Cleanup find_object_base & better error handling

Another bug caused by object removing ELF null section / symbol
from their iterators.

.github/workflows/build.yml

@@ -1,16 +1,17 @@
 name: Build
 
 on:
+  pull_request:
   push:
     paths-ignore:
       - '*.md'
       - 'LICENSE*'
-  pull_request:
+  workflow_dispatch:
 
 env:
   BUILD_PROFILE: release-lto
-  CARGO_BIN_NAME: dtk
   CARGO_TARGET_DIR: target
+  CARGO_INCREMENTAL: 0
 
 jobs:
   check:
@@ -25,6 +26,8 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
+      - name: Cache Rust workspace
+        uses: Swatinem/rust-cache@v2
       - name: Cargo check
         run: cargo check --all-features --all-targets
       - name: Cargo clippy
@@ -74,11 +77,15 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
+      - name: Cache Rust workspace
+        uses: Swatinem/rust-cache@v2
       - name: Cargo test
         run: cargo test --release --all-features
 
   build:
-    name: Build
+    name: Build dtk
+    env:
+      CARGO_BIN_NAME: dtk
     strategy:
       matrix:
         include:
@@ -94,10 +101,10 @@ jobs:
             target: aarch64-unknown-linux-musl
             name: linux-aarch64
             build: zigbuild
-          - platform: ubuntu-latest
-            target: armv7-unknown-linux-musleabi
-            name: linux-armv7l
-            build: zigbuild
+          - platform: windows-latest
+            target: i686-pc-windows-msvc
+            name: windows-x86
+            build: build
           - platform: windows-latest
             target: x86_64-pc-windows-msvc
             name: windows-x86_64
@@ -119,19 +126,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Check git tag against Cargo version
-        if: startsWith(github.ref, 'refs/tags/')
-        shell: bash
-        run: |
-          set -eou
-          version=$(grep '^version' Cargo.toml | awk -F' = ' '{print $2}' | tr -d '"')
-          version="v$version"
-          tag='${{github.ref}}'
-          tag="${tag#refs/tags/}"
-          if [ "$tag" != "$version" ]; then
-            echo "::error::Git tag doesn't match the Cargo version! ($tag != $version)"
-            exit 1
-          fi
       - name: Install dependencies
         if: matrix.packages != ''
         run: |
@@ -139,20 +133,28 @@ jobs:
           sudo apt-get -y install ${{ matrix.packages }}
       - name: Install cargo-zigbuild
         if: matrix.build == 'zigbuild'
-        run: pip install ziglang==0.12.0 cargo-zigbuild==0.18.4
+        run: |
+          python3 -m venv .venv
+          . .venv/bin/activate
+          echo PATH=$PATH >> $GITHUB_ENV
+          pip install ziglang==0.13.0 cargo-zigbuild==0.19.1
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.target }}
+      - name: Cache Rust workspace
+        uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.target }}
       - name: Cargo build
-        run: cargo ${{ matrix.build }} --profile ${{ env.BUILD_PROFILE }} --all-features --target ${{ matrix.target }} --bin ${{ env.CARGO_BIN_NAME }}
+        run: >
+          cargo ${{ matrix.build }} --profile ${{ env.BUILD_PROFILE }} --target ${{ matrix.target }} 
+          --bin ${{ env.CARGO_BIN_NAME }}
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
-          name: ${{ matrix.name }}
+          name: ${{ env.CARGO_BIN_NAME }}-${{ matrix.name }}
           path: |
-            ${{ env.CARGO_TARGET_DIR }}/${{ env.BUILD_PROFILE }}/${{ env.CARGO_BIN_NAME }}
-            ${{ env.CARGO_TARGET_DIR }}/${{ env.BUILD_PROFILE }}/${{ env.CARGO_BIN_NAME }}.exe
             ${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/${{ env.BUILD_PROFILE }}/${{ env.CARGO_BIN_NAME }}
             ${{ env.CARGO_TARGET_DIR }}/${{ matrix.target }}/${{ env.BUILD_PROFILE }}/${{ env.CARGO_BIN_NAME }}.exe
           if-no-files-found: error
@@ -162,7 +164,23 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     needs: [ build ]
+    permissions:
+      contents: write
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Check git tag against Cargo version
+        shell: bash
+        run: |
+          set -eou pipefail
+          tag='${{github.ref}}'
+          tag="${tag#refs/tags/}"
+          version=$(grep '^version' Cargo.toml | head -1 | awk -F' = ' '{print $2}' | tr -d '"')
+          version="v$version"
+          if [ "$tag" != "$version" ]; then
+            echo "::error::Git tag doesn't match the Cargo version! ($tag != $version)"
+            exit 1
+          fi
       - name: Download artifacts
         uses: actions/download-artifact@v4
         with:
@@ -170,12 +188,28 @@ jobs:
       - name: Rename artifacts
         working-directory: artifacts
         run: |
+          set -euo pipefail
           mkdir ../out
-          for i in */*/$BUILD_PROFILE/$CARGO_BIN_NAME*; do
-            mv "$i" "../out/$(sed -E "s/([^/]+)\/[^/]+\/$BUILD_PROFILE\/($CARGO_BIN_NAME)/\2-\1/" <<< "$i")"
+          for dir in */; do
+            for file in "$dir"*; do
+              base=$(basename "$file")
+              name="${base%.*}"
+              ext="${base##*.}"
+              if [ "$ext" = "$base" ]; then
+                  ext=""
+              else
+                  ext=".$ext"
+              fi
+              arch="${dir%/}" # remove trailing slash
+              arch="${arch##"$name-"}" # remove bin name
+              dst="../out/${name}-${arch}${ext}"
+              mv "$file" "$dst"
+            done
           done
           ls -R ../out
       - name: Release
         uses: softprops/action-gh-release@v2
         with:
           files: out/*
+          draft: true
+          generate_release_notes: true

Cargo.toml

@@ -3,13 +3,13 @@ name = "decomp-toolkit"
 description = "Yet another GameCube/Wii decompilation toolkit."
 authors = ["Luke Street <luke@street.dev>"]
 license = "MIT OR Apache-2.0"
-version = "0.9.3"
+version = "1.1.4"
 edition = "2021"
 publish = false
 repository = "https://github.com/encounter/decomp-toolkit"
 readme = "README.md"
 categories = ["command-line-utilities"]
-rust-version = "1.73.0"
+rust-version = "1.81"
 
 [[bin]]
 name = "dtk"
@@ -20,56 +20,63 @@ panic = "abort"
 
 [profile.release-lto]
 inherits = "release"
-lto = "thin"
+lto = "fat"
 strip = "debuginfo"
+codegen-units = 1
 
 [dependencies]
-anyhow = { version = "1.0.82", features = ["backtrace"] }
+anyhow = { version = "1.0", features = ["backtrace"] }
 ar = { git = "https://github.com/bjorn3/rust-ar.git", branch = "write_symbol_table" }
-argp = "0.3.0"
-base16ct = "0.2.0"
-base64 = "0.22.1"
-crossterm = "0.27.0"
-cwdemangle = "1.0.0"
-enable-ansi-support = "0.2.1"
-filetime = "0.2.23"
-fixedbitset = "0.5.7"
-flagset = { version = "0.4.5", features = ["serde"] }
-glob = "0.3.1"
-hex = "0.4.3"
-indent = "0.1.1"
-indexmap = "2.2.6"
-itertools = "0.12.1"
-log = "0.4.21"
-memchr = "2.7.2"
-memmap2 = "0.9.4"
-multimap = "0.10.0"
-nintendo-lz = "0.1.3"
-nodtool = { git = "https://github.com/encounter/nod-rs", rev = "03b83484cb17f94408fa0ef8e50d94951464d1b2" }
+argp = "0.3"
+base16ct = "0.2"
+base64 = "0.22"
+byteorder = "1.5"
+typed-path = "0.9"
+crossterm = "0.28"
+cwdemangle = "1.0"
+cwextab = "1.0"
+dyn-clone = "1.0"
+enable-ansi-support = "0.2"
+filetime = "0.2"
+fixedbitset = "0.5"
+flagset = { version = "0.4", features = ["serde"] }
+glob = "0.3"
+hex = "0.4"
+indent = "0.1"
+indexmap = "2.6"
+itertools = "0.13"
+log = "0.4"
+memchr = "2.7"
+memmap2 = "0.9"
+multimap = "0.10"
+nodtool = "1.4"
 #nodtool = { path = "../nod-rs/nodtool" }
-num_enum = "0.7.2"
-objdiff-core = { git = "https://github.com/encounter/objdiff", rev = "a5a6a3928e392d5af5d92826e73b77e074b8788c", features = ["ppc"] }
+num_enum = "0.7"
+objdiff-core = { version = "2.2", features = ["ppc"] }
 #objdiff-core = { path = "../objdiff/objdiff-core", features = ["ppc"] }
-object = { version = "0.35.0", features = ["read_core", "std", "elf", "write_std"], default-features = false }
-once_cell = "1.19.0"
-orthrus-ncompress = "0.2.1"
-owo-colors = { version = "4.0.0", features = ["supports-colors"] }
-path-slash = "0.2.1"
-petgraph = { version = "0.6.4", default-features = false }
-ppc750cl = { git = "https://github.com/encounter/ppc750cl", rev = "6cbd7d888c7082c2c860f66cbb9848d633f753ed" }
-rayon = "1.10.0"
-regex = "1.10.4"
-rustc-hash = "1.1.0"
-sanitise-file-name = "1.0.0"
-serde = "1.0.199"
-serde_json = "1.0.116"
-serde_repr = "0.1.19"
-serde_yaml = "0.9.34"
-sha-1 = "0.10.1"
-supports-color = "3.0.0"
-syntect = { version = "5.2.0", features = ["parsing", "regex-fancy", "dump-load"], default-features = false }
-tracing = "0.1.40"
-tracing-attributes = "0.1.27"
-tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
-xxhash-rust = { version = "0.8.10", features = ["xxh3"] }
-zerocopy = { version = "0.7.34", features = ["derive"] }
+object = { version = "0.36", features = ["read_core", "std", "elf", "write_std"], default-features = false }
+once_cell = "1.20"
+orthrus-ncompress = "0.2"
+owo-colors = { version = "4.1", features = ["supports-colors"] }
+petgraph = { version = "0.6", default-features = false }
+ppc750cl = "0.3"
+rayon = "1.10"
+regex = "1.11"
+rustc-hash = "2.0"
+sanitise-file-name = "1.0"
+serde = "1.0"
+serde_json = "1.0"
+serde_repr = "0.1"
+serde_yaml = "0.9"
+sha-1 = "0.10"
+size = "0.4"
+supports-color = "3.0"
+syntect = { version = "5.2", features = ["parsing", "regex-fancy", "dump-load"], default-features = false }
+tracing = "0.1"
+tracing-attributes = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+xxhash-rust = { version = "0.8", features = ["xxh3"] }
+zerocopy = { version = "0.8", features = ["derive"] }
+
+[target.'cfg(target_env = "musl")'.dependencies]
+mimalloc = "0.1"

README.md

@@ -39,12 +39,15 @@ project structure and build system that uses decomp-toolkit under the hood.
   - [rel info](#rel-info)
   - [rel merge](#rel-merge)
   - [rso info](#rso-info)
+  - [rso make](#rso-make)
   - [shasum](#shasum)
   - [nlzss decompress](#nlzss-decompress)
   - [rarc list](#rarc-list)
   - [rarc extract](#rarc-extract)
   - [u8 list](#u8-list)
   - [u8 extract](#u8-extract)
+  - [vfs ls](#vfs-ls)
+  - [vfs cp](#vfs-cp)
   - [yay0 decompress](#yay0-decompress)
   - [yay0 compress](#yay0-compress)
   - [yaz0 decompress](#yaz0-decompress)
@@ -88,8 +91,6 @@ binary that is byte-for-byte identical to the original, then we know that the de
 decomp-toolkit provides tooling for analyzing and splitting the original binary into relocatable objects, as well
 as generating the linker script and other files needed to link the decompiled code.
 
-
-
 ## Analyzer features
 
 **Function boundary analysis**  
@@ -125,11 +126,6 @@ If desired, optionally writes GNU assembler-compatible files alongside the objec
 **Linker script generation**  
 Generates `ldscript.lcf` for `mwldeppc.exe`.
 
-**Future work**
-
-- Support RSO files
-- Add more signatures
-
 ## Commands
 
 ### ar create
@@ -180,6 +176,8 @@ and its `nodtool` command line tool._
 
 Displays information about disc images.
 
+To list the contents of a disc image, use [vfs ls](#vfs-ls).
+
 Supported disc image formats:
 
 - ISO (GCM)
@@ -188,6 +186,7 @@ Supported disc image formats:
 - CISO (+ NKit 2 lossless)
 - NFS (Wii U VC)
 - GCZ
+- TGC
 
 ```shell
 $ dtk disc info /path/to/game.iso
@@ -199,6 +198,9 @@ Extracts the contents of disc images to a directory.
 
 See [disc info](#disc-info) for supported formats.
 
+> [!NOTE]  
+> [vfs cp](#vfs-cp) is more flexible and supports disc images.
+
 ```shell
 $ dtk disc extract /path/to/game.iso [outdir]
 ```
@@ -233,21 +235,23 @@ $ dtk disc verify /path/to/game.iso
 
 Analyzes a DOL file and outputs information section and symbol information.
 
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
 ```shell
 $ dtk dol info input.dol
+# or, directly from a disc image
+$ dtk dol info 'disc.rvz:sys/main.dol'
 ```
 
 ### dol split
 
-> [!NOTE]  
-> This command is a work-in-progress.
+> [!IMPORTANT]  
+> **This command is intended to be used as part of a decompilation project's build system.**  
+> For an example project structure and for documentation on the configuration, see
+> [dtk-template](https://github.com/encounter/dtk-template).
 
 Analyzes and splits a DOL file into relocatable objects based on user configuration.
 
-**This command is intended to be used as part of a decompilation project's build system.**  
-For an example project structure and for documentation on the configuration, see
-[dtk-template](https://github.com/encounter/dtk-template).
-
 ```shell
 $ dtk dol split config.yml target
 ```
@@ -321,6 +325,8 @@ Creates a DOL file from the provided ELF file.
 
 ```shell
 $ dtk elf2dol input.elf output.dol
+# or, to ignore certain sections
+$ dtk elf2dol input.elf output.dol --ignore debug_section1 --ignore debug_section2
 ```
 
 ### map
@@ -344,8 +350,12 @@ $ dtk map symbol Game.MAP 'Function__5ClassFv'
 
 Prints information about a REL file.
 
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
 ```shell
 $ dtk rel info input.rel
+# or, directly from a disc image
+$ dtk rel info 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel'
 ```
 
 ### rel merge
@@ -368,6 +378,22 @@ Prints information about an RSO file.
 $ dtk rso info input.rso
 ```
 
+### rso make
+
+> [!WARNING]  
+> This command does not yet support creating SEL files.
+
+Creates an RSO file from a relocatable ELF file.
+
+Options:
+- `-o`, `--output <File>`: Output RSO file.
+- `-m`, `--module-name <Name>`: Module name (or path). Default: input name
+- `-e`, `--export <File>`: File containing exported symbol names. (Newline separated)
+
+```shell
+$ dtk rso make input.elf -o input.rso
+```
+
 ### shasum
 
 Calculate and verify SHA-1 hashes.
@@ -392,6 +418,10 @@ $ dtk nlzss decompress rels/*.lz -o rels
 
 ### rarc list
 
+> [!NOTE]  
+> [vfs ls](#vfs-ls) is more flexible and supports RARC archives.  
+> This command is now equivalent to `dtk vfs ls -r input.arc:`
+
 Lists the contents of an RARC (older .arc) archive.
 
 ```shell
@@ -400,6 +430,10 @@ $ dtk rarc list input.arc
 
 ### rarc extract
 
+> [!NOTE]  
+> [vfs cp](#vfs-cp) is more flexible and supports RARC archives.  
+> This command is now equivalent to `dtk vfs cp input.arc: output_dir`
+
 Extracts the contents of an RARC (older .arc) archive.
 
 ```shell
@@ -408,6 +442,10 @@ $ dtk rarc extract input.arc -o output_dir
 
 ### u8 list
 
+> [!NOTE]
+> [vfs ls](#vfs-ls) is more flexible and supports U8 archives.  
+> This command is now equivalent to `dtk vfs ls -r input.arc:`
+
 Extracts the contents of a U8 (newer .arc) archive.
 
 ```shell
@@ -416,12 +454,75 @@ $ dtk u8 list input.arc
 
 ### u8 extract
 
+> [!NOTE]
+> [vfs cp](#vfs-cp) is more flexible and supports U8 archives.  
+> This command is now equivalent to `dtk vfs cp input.arc: output_dir`
+
 Extracts the contents of a U8 (newer .arc) archive.
 
 ```shell
 $ dtk u8 extract input.arc -o output_dir
 ```
 
+### vfs ls
+
+decomp-toolkit has a powerful virtual filesystem (VFS) abstraction that allows you to work with a
+variety of containers. All operations happen in memory with minimal overhead and no temporary files.
+
+Supported containers:
+
+- Disc images (see [disc info](#disc-info) for supported formats)
+- RARC archives (older .arc)
+- U8 archives (newer .arc)
+
+Supported compression formats are handled transparently:
+- Yay0 (SZP) / Yaz0 (SZS)
+- NLZSS (.lz) (Use `:nlzss` in the path)
+
+`vfs ls` lists the contents of a container or directory.
+
+Options:
+
+- `-r`, `--recursive`: Recursively list contents.
+- `-s`, `--short`: Only list file names.
+
+Examples:
+
+```shell
+# List the contents of the `amem` directory inside `RELS.arc` in a disc image
+$ dtk vfs ls 'disc.rvz:files/RELS.arc:amem'
+# List the contents of `RELS.arc` recursively
+$ dtk vfs ls -r 'disc.rvz:files/RELS.arc:'
+
+# All commands that accept a file path can also accept a VFS path
+$ dtk rel info 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel'
+# Example disc image within a disc image
+$ dtk dol info 'disc.rvz:files/zz_demo.tgc:sys/main.dol'
+````
+
+### vfs cp
+
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
+`vfs cp` copies files and directories recursively to the host filesystem.
+
+Options:
+
+- `--no-decompress`: Do not decompress files when copying.
+- `-q`, `--quiet`: Suppresses all output except errors.
+
+Examples:
+
+```shell
+# Extract a file from a nested path in a disc image to the current directory
+$ dtk vfs cp 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel' .
+
+# Directories are copied recursively, making it easy to extract entire archives
+$ dtk vfs cp 'disc.rvz:files/RELS.arc:' rels
+# Or, to disable automatic decompression
+$ dtk vfs cp --no-decompress 'disc.rvz:files/RELS.arc:' rels
+```
+
 ### yay0 decompress
 
 Decompresses Yay0-compressed files.

deny.toml

@@ -9,6 +9,11 @@
 # The values provided in this template are the default values that will be used
 # when any section or field is not specified in your own configuration
 
+# Root options
+
+# The graph table configures how the dependency graph is constructed and thus
+# which crates the checks are performed against
+[graph]
 # If 1 or more target triples (and optionally, target_features) are specified,
 # only the specified targets will be checked when running `cargo deny check`.
 # This means, if a particular package is only ever used as a target specific
@@ -20,53 +25,67 @@
 targets = [
     # The triple can be any string, but only the target triples built in to
     # rustc (as of 1.40) can be checked against actual config expressions
-    #{ triple = "x86_64-unknown-linux-musl" },
+    #"x86_64-unknown-linux-musl",
     # You can also specify which target_features you promise are enabled for a
     # particular target. target_features are currently not validated against
     # the actual valid features supported by the target architecture.
     #{ triple = "wasm32-unknown-unknown", features = ["atomics"] },
 ]
+# When creating the dependency graph used as the source of truth when checks are
+# executed, this field can be used to prune crates from the graph, removing them
+# from the view of cargo-deny. This is an extremely heavy hammer, as if a crate
+# is pruned from the graph, all of its dependencies will also be pruned unless
+# they are connected to another crate in the graph that hasn't been pruned,
+# so it should be used with care. The identifiers are [Package ID Specifications]
+# (https://doc.rust-lang.org/cargo/reference/pkgid-spec.html)
+#exclude = []
+# If true, metadata will be collected with `--all-features`. Note that this can't
+# be toggled off if true, if you want to conditionally enable `--all-features` it
+# is recommended to pass `--all-features` on the cmd line instead
+all-features = false
+# If true, metadata will be collected with `--no-default-features`. The same
+# caveat with `all-features` applies
+no-default-features = false
+# If set, these feature will be enabled when collecting metadata. If `--features`
+# is specified on the cmd line they will take precedence over this option.
+#features = []
+
+# The output table provides options for how/if diagnostics are outputted
+[output]
+# When outputting inclusion graphs in diagnostics that include features, this
+# option can be used to specify the depth at which feature edges will be added.
+# This option is included since the graphs can be quite large and the addition
+# of features from the crate(s) to all of the graph roots can be far too verbose.
+# This option can be overridden via `--feature-depth` on the cmd line
+feature-depth = 1
 
 # This section is considered when running `cargo deny check advisories`
 # More documentation for the advisories section can be found here:
 # https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
 [advisories]
-# The path where the advisory database is cloned/fetched into
-db-path = "~/.cargo/advisory-db"
+# The path where the advisory databases are cloned/fetched into
+#db-path = "$CARGO_HOME/advisory-dbs"
 # The url(s) of the advisory databases to use
-db-urls = ["https://github.com/rustsec/advisory-db"]
-# The lint level for security vulnerabilities
-vulnerability = "deny"
-# The lint level for unmaintained crates
-unmaintained = "warn"
-# The lint level for crates that have been yanked from their source registry
-yanked = "warn"
-# The lint level for crates with security notices. Note that as of
-# 2019-12-17 there are no security notice advisories in
-# https://github.com/rustsec/advisory-db
-notice = "warn"
+#db-urls = ["https://github.com/rustsec/advisory-db"]
 # A list of advisory IDs to ignore. Note that ignored advisories will still
 # output a note when they are encountered.
 ignore = [
     #"RUSTSEC-0000-0000",
+    #{ id = "RUSTSEC-0000-0000", reason = "you can specify a reason the advisory is ignored" },
+    #"a-crate-that-is-yanked@0.1.1", # you can also ignore yanked crate versions if you wish
+    #{ crate = "a-crate-that-is-yanked@0.1.1", reason = "you can specify why you are ignoring the yanked crate" },
 ]
-# Threshold for security vulnerabilities, any vulnerability with a CVSS score
-# lower than the range specified will be ignored. Note that ignored advisories
-# will still output a note when they are encountered.
-# * None - CVSS Score 0.0
-# * Low - CVSS Score 0.1 - 3.9
-# * Medium - CVSS Score 4.0 - 6.9
-# * High - CVSS Score 7.0 - 8.9
-# * Critical - CVSS Score 9.0 - 10.0
-#severity-threshold =
+# If this is true, then cargo deny will use the git executable to fetch advisory database.
+# If this is false, then it uses a built-in git library.
+# Setting this to true can be helpful if you have special authentication requirements that cargo-deny does not support.
+# See Git Authentication for more information about setting up git authentication.
+#git-fetch-with-cli = true
 
 # This section is considered when running `cargo deny check licenses`
 # More documentation for the licenses section can be found here:
 # https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
 [licenses]
-# The lint level for crates which do not have a detectable license
-unlicensed = "deny"
-# List of explictly allowed licenses
+# List of explicitly allowed licenses
 # See https://spdx.org/licenses/ for list of possible licenses
 # [possible values: any SPDX 3.11 short identifier (+ optional exception)].
 allow = [
@@ -77,28 +96,10 @@ allow = [
     "BSL-1.0",
     "ISC",
     "MIT",
+    "MPL-2.0",
     "Unicode-DFS-2016",
+    "Zlib",
 ]
-# List of explictly disallowed licenses
-# See https://spdx.org/licenses/ for list of possible licenses
-# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
-deny = [
-    #"Nokia",
-]
-# Lint level for licenses considered copyleft
-copyleft = "warn"
-# Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
-# * both - The license will be approved if it is both OSI-approved *AND* FSF
-# * either - The license will be approved if it is either OSI-approved *OR* FSF
-# * osi-only - The license will be approved if is OSI-approved *AND NOT* FSF
-# * fsf-only - The license will be approved if is FSF *AND NOT* OSI-approved
-# * neither - This predicate is ignored and the default lint level is used
-allow-osi-fsf-free = "neither"
-# Lint level used when no other predicates are matched
-# 1. License isn't in the allow or deny lists
-# 2. License isn't copyleft
-# 3. License isn't OSI/FSF, or allow-osi-fsf-free = "neither"
-default = "deny"
 # The confidence threshold for detecting a license from license text.
 # The higher the value, the more closely the license text must be to the
 # canonical license text of a valid SPDX license file.
@@ -109,32 +110,32 @@ confidence-threshold = 0.8
 exceptions = [
     # Each entry is the crate and version constraint, and its specific allow
     # list
-    #{ allow = ["Zlib"], name = "adler32", version = "*" },
+    #{ allow = ["Zlib"], crate = "adler32" },
 ]
 
 # Some crates don't have (easily) machine readable licensing information,
 # adding a clarification entry for it allows you to manually specify the
 # licensing information
-[[licenses.clarify]]
-# The name of the crate the clarification applies to
-name = "encoding_rs"
-# The optional version constraint for the crate
-#version = "*"
+#[[licenses.clarify]]
+# The package spec the clarification applies to
+#crate = "ring"
 # The SPDX expression for the license requirements of the crate
-expression = "(Apache-2.0 OR MIT) AND BSD-3-Clause"
+#expression = "MIT AND ISC AND OpenSSL"
 # One or more files in the crate's source used as the "source of truth" for
 # the license expression. If the contents match, the clarification will be used
 # when running the license check, otherwise the clarification will be ignored
 # and the crate will be checked normally, which may produce warnings or errors
 # depending on the rest of your configuration
-license-files = [
-    # Each entry is a crate relative path, and the (opaque) hash of its contents
-    { path = "COPYRIGHT", hash = 0x39f8ad31 }
-]
+#license-files = [
+# Each entry is a crate relative path, and the (opaque) hash of its contents
+#{ path = "LICENSE", hash = 0xbd0eed23 }
+#]
 
 [licenses.private]
 # If true, ignores workspace crates that aren't published, or are only
-# published to private registries
+# published to private registries.
+# To see how to mark a crate as unpublished (to the official registry),
+# visit https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field.
 ignore = false
 # One or more private registries that you might publish crates to, if a crate
 # is only published to private registries, and ignore is true, the crate will
@@ -148,7 +149,7 @@ registries = [
 # https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
 [bans]
 # Lint level for when multiple versions of the same crate are detected
-multiple-versions = "warn"
+multiple-versions = "allow"
 # Lint level for when a crate version requirement is `*`
 wildcards = "allow"
 # The graph highlighting used when creating dotgraphs for crates
@@ -157,30 +158,63 @@ wildcards = "allow"
 # * simplest-path - The path to the version with the fewest edges is highlighted
 # * all - Both lowest-version and simplest-path are used
 highlight = "all"
+# The default lint level for `default` features for crates that are members of
+# the workspace that is being checked. This can be overridden by allowing/denying
+# `default` on a crate-by-crate basis if desired.
+workspace-default-features = "allow"
+# The default lint level for `default` features for external crates that are not
+# members of the workspace. This can be overridden by allowing/denying `default`
+# on a crate-by-crate basis if desired.
+external-default-features = "allow"
 # List of crates that are allowed. Use with care!
 allow = [
-    #{ name = "ansi_term", version = "=0.11.0" },
+    #"ansi_term@0.11.0",
+    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is allowed" },
 ]
 # List of crates to deny
 deny = [
-    # Each entry the name of a crate and a version range. If version is
-    # not specified, all versions will be matched.
-    #{ name = "ansi_term", version = "=0.11.0" },
-    #
+    #"ansi_term@0.11.0",
+    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason it is banned" },
     # Wrapper crates can optionally be specified to allow the crate when it
     # is a direct dependency of the otherwise banned crate
-    #{ name = "ansi_term", version = "=0.11.0", wrappers = [] },
+    #{ crate = "ansi_term@0.11.0", wrappers = ["this-crate-directly-depends-on-ansi_term"] },
 ]
+
+# List of features to allow/deny
+# Each entry the name of a crate and a version range. If version is
+# not specified, all versions will be matched.
+#[[bans.features]]
+#crate = "reqwest"
+# Features to not allow
+#deny = ["json"]
+# Features to allow
+#allow = [
+#    "rustls",
+#    "__rustls",
+#    "__tls",
+#    "hyper-rustls",
+#    "rustls",
+#    "rustls-pemfile",
+#    "rustls-tls-webpki-roots",
+#    "tokio-rustls",
+#    "webpki-roots",
+#]
+# If true, the allowed features must exactly match the enabled feature set. If
+# this is set there is no point setting `deny`
+#exact = true
+
 # Certain crates/versions that will be skipped when doing duplicate detection.
 skip = [
-    #{ name = "ansi_term", version = "=0.11.0" },
+    #"ansi_term@0.11.0",
+    #{ crate = "ansi_term@0.11.0", reason = "you can specify a reason why it can't be updated/removed" },
 ]
 # Similarly to `skip` allows you to skip certain crates during duplicate
 # detection. Unlike skip, it also includes the entire tree of transitive
 # dependencies starting at the specified crate, up to a certain depth, which is
-# by default infinite
+# by default infinite.
 skip-tree = [
-    #{ name = "ansi_term", version = "=0.11.0", depth = 20 },
+    #"ansi_term@0.11.0", # will be skipped along with _all_ of its direct and transitive dependencies
+    #{ crate = "ansi_term@0.11.0", depth = 20 },
 ]
 
 # This section is considered when running `cargo deny check sources`.
@@ -200,9 +234,9 @@ allow-registry = ["https://github.com/rust-lang/crates.io-index"]
 allow-git = []
 
 [sources.allow-org]
-# 1 or more github.com organizations to allow git sources for
-#github = [""]
-# 1 or more gitlab.com organizations to allow git sources for
-#gitlab = [""]
-# 1 or more bitbucket.org organizations to allow git sources for
-#bitbucket = [""]
+# github.com organizations to allow git sources for
+github = ["bjorn3"]
+# gitlab.com organizations to allow git sources for
+gitlab = []
+# bitbucket.org organizations to allow git sources for
+bitbucket = []

src/analysis/cfa.rs

@@ -16,12 +16,15 @@ use crate::{
         vm::{BranchTarget, GprValue, StepResult, VM},
         RelocationTarget,
     },
-    obj::{ObjInfo, ObjSectionKind, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind},
+    obj::{
+        ObjInfo, ObjSectionKind, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
+        SectionIndex,
+    },
 };
 
 #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct SectionAddress {
-    pub section: usize,
+    pub section: SectionIndex,
     pub address: u32,
 }
 
@@ -38,7 +41,7 @@ impl Display for SectionAddress {
 }
 
 impl SectionAddress {
-    pub fn new(section: usize, address: u32) -> Self { Self { section, address } }
+    pub fn new(section: SectionIndex, address: u32) -> Self { Self { section, address } }
 
     pub fn offset(self, offset: i32) -> Self {
         Self { section: self.section, address: self.address.wrapping_add_signed(offset) }
@@ -53,6 +56,10 @@ impl SectionAddress {
     }
 
     pub fn is_aligned(self, align: u32) -> bool { self.address & (align - 1) == 0 }
+
+    pub fn wrapping_add(self, rhs: u32) -> Self {
+        Self { section: self.section, address: self.address.wrapping_add(rhs) }
+    }
 }
 
 impl Add<u32> for SectionAddress {
@@ -116,7 +123,7 @@ pub struct AnalyzerState {
     pub functions: BTreeMap<SectionAddress, FunctionInfo>,
     pub jump_tables: BTreeMap<SectionAddress, u32>,
     pub known_symbols: BTreeMap<SectionAddress, Vec<ObjSymbol>>,
-    pub known_sections: BTreeMap<usize, String>,
+    pub known_sections: BTreeMap<SectionIndex, String>,
 }
 
 impl AnalyzerState {
@@ -597,19 +604,27 @@ pub fn locate_bss_memsets(obj: &mut ObjInfo) -> Result<Vec<(u32, u32)>> {
                 StepResult::Branch(branches) => {
                     for branch in branches {
                         if branch.link {
-                            // ProDG bug? Registers are supposed to start at r3
+                            // Some ProDG crt0.s versions use the wrong registers, some don't
                             if let (
                                 GprValue::Constant(addr),
                                 GprValue::Constant(value),
                                 GprValue::Constant(size),
-                            ) = (vm.gpr_value(4), vm.gpr_value(5), vm.gpr_value(6))
-                            {
+                            ) = {
+                                if vm.gpr_value(4) == GprValue::Constant(0) {
+                                    (vm.gpr_value(3), vm.gpr_value(4), vm.gpr_value(5))
+                                } else {
+                                    (vm.gpr_value(4), vm.gpr_value(5), vm.gpr_value(6))
+                                }
+                            } {
                                 if value == 0 && size > 0 {
                                     bss_sections.push((addr, size));
                                 }
                             }
                         }
                     }
+                    if bss_sections.len() >= 2 {
+                        return Ok(ExecCbResult::End(()));
+                    }
                     Ok(ExecCbResult::Continue)
                 }
             }

src/analysis/executor.rs

@@ -18,7 +18,7 @@ struct VisitedAddresses {
 
 impl VisitedAddresses {
     pub fn new(obj: &ObjInfo) -> Self {
-        let mut inner = Vec::with_capacity(obj.sections.len());
+        let mut inner = Vec::with_capacity(obj.sections.len() as usize);
         for (_, section) in obj.sections.iter() {
             if section.kind == ObjSectionKind::Code {
                 let size = (section.size / 4) as usize;
@@ -32,11 +32,13 @@ impl VisitedAddresses {
     }
 
     pub fn contains(&self, section_address: u32, address: SectionAddress) -> bool {
-        self.inner[address.section].contains(Self::bit_for(section_address, address.address))
+        self.inner[address.section as usize]
+            .contains(Self::bit_for(section_address, address.address))
     }
 
     pub fn insert(&mut self, section_address: u32, address: SectionAddress) {
-        self.inner[address.section].insert(Self::bit_for(section_address, address.address));
+        self.inner[address.section as usize]
+            .insert(Self::bit_for(section_address, address.address));
     }
 
     #[inline]

src/analysis/mod.rs

@@ -6,7 +6,9 @@ use ppc750cl::Ins;
 use crate::{
     analysis::cfa::SectionAddress,
     array_ref,
-    obj::{ObjInfo, ObjKind, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbolKind},
+    obj::{
+        ObjInfo, ObjKind, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbolKind, SectionIndex,
+    },
 };
 
 pub mod cfa;
@@ -36,11 +38,9 @@ fn read_unresolved_relocation_address(
     address: u32,
     reloc_kind: Option<ObjRelocKind>,
 ) -> Result<Option<RelocationTarget>> {
-    if let Some(reloc) = obj
-        .unresolved_relocations
-        .iter()
-        .find(|reloc| reloc.section as usize == section.elf_index && reloc.address == address)
-    {
+    if let Some(reloc) = obj.unresolved_relocations.iter().find(|reloc| {
+        reloc.section as SectionIndex == section.elf_index && reloc.address == address
+    }) {
         if reloc.module_id != obj.module_id {
             return Ok(Some(RelocationTarget::External));
         }
@@ -48,7 +48,7 @@ fn read_unresolved_relocation_address(
             ensure!(reloc.kind == reloc_kind);
         }
         let (target_section_index, target_section) =
-            obj.sections.get_elf_index(reloc.target_section as usize).ok_or_else(|| {
+            obj.sections.get_elf_index(reloc.target_section as SectionIndex).ok_or_else(|| {
                 anyhow!(
                     "Failed to find target section {} for unresolved relocation",
                     reloc.target_section

src/analysis/objects.rs

@@ -1,7 +1,7 @@
 use anyhow::Result;
 
 use crate::{
-    obj::{ObjDataKind, ObjInfo, ObjSectionKind, ObjSymbolKind},
+    obj::{ObjDataKind, ObjInfo, ObjSectionKind, ObjSymbolKind, SymbolIndex},
     util::split::is_linker_generated_label,
 };
 
@@ -64,7 +64,7 @@ pub fn detect_objects(obj: &mut ObjInfo) -> Result<()> {
 }
 
 pub fn detect_strings(obj: &mut ObjInfo) -> Result<()> {
-    let mut symbols_set = Vec::<(usize, ObjDataKind, usize)>::new();
+    let mut symbols_set = Vec::<(SymbolIndex, ObjDataKind, usize)>::new();
     for (section_index, section) in obj
         .sections
         .iter()

src/analysis/pass.rs

@@ -7,7 +7,7 @@ use crate::{
     analysis::cfa::{AnalyzerState, FunctionInfo, SectionAddress},
     obj::{
         ObjInfo, ObjKind, ObjRelocKind, ObjSectionKind, ObjSymbol, ObjSymbolFlagSet,
-        ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbolFlags, ObjSymbolKind, SectionIndex,
     },
 };
 
@@ -147,14 +147,14 @@ impl AnalysisPass for FindRelCtorsDtors {
                 // And the section ends with a null pointer
                 while let Some(reloc) = obj.unresolved_relocations.iter().find(|reloc| {
                     reloc.module_id == obj.module_id
-                        && reloc.section == section.elf_index as u8
+                        && reloc.section as SectionIndex == section.elf_index
                         && reloc.address == current_address
                         && reloc.kind == ObjRelocKind::Absolute
                 }) {
-                    let Some((target_section_index, target_section)) = obj
-                        .sections
-                        .iter()
-                        .find(|(_, section)| section.elf_index == reloc.target_section as usize)
+                    let Some((target_section_index, target_section)) =
+                        obj.sections.iter().find(|(_, section)| {
+                            section.elf_index == reloc.target_section as SectionIndex
+                        })
                     else {
                         return false;
                     };

src/analysis/tracker.rs

@@ -4,6 +4,7 @@ use std::{
 };
 
 use anyhow::{bail, Result};
+use cwextab::decode_extab;
 use ppc750cl::Opcode;
 use tracing::{debug_span, info_span};
 use tracing_attributes::instrument;
@@ -18,7 +19,7 @@ use crate::{
     },
     obj::{
         ObjDataKind, ObjInfo, ObjKind, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind,
-        ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind, SectionIndex, SymbolIndex,
     },
 };
 
@@ -120,6 +121,7 @@ impl Tracker {
                 self.process_data(obj, section_index, section)?;
             }
         }
+        self.check_extab_relocations(obj)?;
         self.reject_invalid_relocations(obj)?;
         Ok(())
     }
@@ -147,6 +149,62 @@ impl Tracker {
         Ok(())
     }
 
+    /// Check all of the extab relocations, and reject any invalid ones by checking against the decoded table data
+    /// of each table.
+    fn check_extab_relocations(&mut self, obj: &ObjInfo) -> Result<()> {
+        let mut to_reject = vec![];
+        let Some((section_index, section)) = obj.sections.by_name("extab")? else {
+            // No extab section found, return
+            return Ok(());
+        };
+        let mut decoded_reloc_addrs: BTreeSet<u32> = BTreeSet::new();
+
+        // Decode each exception table, and collect all of the relocations from the decoded data for each
+        for (_, symbol) in obj.symbols.for_section(section_index) {
+            let extab_name = &symbol.name;
+            let extab_start_addr: u32 = symbol.address as u32;
+            let extab_end_addr: u32 = extab_start_addr + symbol.size as u32;
+            let Ok(extab_data) = section.data_range(extab_start_addr, extab_end_addr) else {
+                log::warn!("Failed to get extab data for symbol {}", extab_name);
+                continue;
+            };
+            let data = match decode_extab(extab_data) {
+                Ok(decoded_data) => decoded_data,
+                Err(e) => {
+                    log::warn!(
+                        "Exception table decoding failed for symbol {}, reason: {}",
+                        extab_name,
+                        e
+                    );
+                    continue;
+                }
+            };
+
+            for reloc in data.relocations {
+                let reloc_addr = extab_start_addr + reloc.offset;
+                decoded_reloc_addrs.insert(reloc_addr);
+            }
+        }
+
+        let section_start_addr = SectionAddress::new(section_index, section.address as u32);
+        let section_end_addr = section_start_addr + (section.size as u32);
+
+        // Check all the extab relocations against the list of relocations from the decoded tables. Any
+        // relocations that aren't in the list are invalid, and are removed (if a table fails to decode,
+        // however, its relocations are all removed).
+        for (&address, _) in self.relocations.range(section_start_addr..section_end_addr) {
+            if !decoded_reloc_addrs.contains(&address.address) {
+                log::debug!("Rejecting invalid extab relocation @ {}", address);
+                to_reject.push(address);
+            }
+        }
+
+        for address in to_reject {
+            self.relocations.remove(&address);
+        }
+        Ok(())
+    }
+
     fn process_code(&mut self, obj: &ObjInfo) -> Result<()> {
         if let Some(entry) = obj.entry {
             let (section_index, _) = obj.sections.at_address(entry as u32)?;
@@ -240,7 +298,7 @@ impl Tracker {
                                     debug_assert_ne!(
                                         value,
                                         RelocationTarget::Address(SectionAddress::new(
-                                            usize::MAX,
+                                            SectionIndex::MAX,
                                             0
                                         ))
                                     );
@@ -301,7 +359,7 @@ impl Tracker {
                                     debug_assert_ne!(
                                         address,
                                         RelocationTarget::Address(SectionAddress::new(
-                                            usize::MAX,
+                                            SectionIndex::MAX,
                                             0
                                         ))
                                     );
@@ -322,7 +380,7 @@ impl Tracker {
                                     debug_assert_ne!(
                                         address,
                                         RelocationTarget::Address(SectionAddress::new(
-                                            usize::MAX,
+                                            SectionIndex::MAX,
                                             0
                                         ))
                                     );
@@ -406,7 +464,7 @@ impl Tracker {
                             {
                                 (addr, is_function_addr(addr))
                             } else {
-                                (SectionAddress::new(usize::MAX, 0), false)
+                                (SectionAddress::new(SectionIndex::MAX, 0), false)
                             };
                             if branch.link || !is_fn_addr {
                                 self.relocations.insert(ins_addr, match ins.op {
@@ -491,7 +549,7 @@ impl Tracker {
     fn process_data(
         &mut self,
         obj: &ObjInfo,
-        section_index: usize,
+        section_index: SectionIndex,
         section: &ObjSection,
     ) -> Result<()> {
         let mut addr = SectionAddress::new(section_index, section.address as u32);
@@ -544,7 +602,7 @@ impl Tracker {
         } else {
             // Check known relocations (function signature matching)
             if self.known_relocations.contains(&from) {
-                return Some(SectionAddress::new(usize::MAX, addr));
+                return Some(SectionAddress::new(SectionIndex::MAX, addr));
             }
             // Check special symbols
             if self.stack_address == Some(addr)
@@ -555,7 +613,7 @@ impl Tracker {
                 || self.sda2_base == Some(addr)
                 || self.sda_base == Some(addr)
             {
-                return Some(SectionAddress::new(usize::MAX, addr));
+                return Some(SectionAddress::new(SectionIndex::MAX, addr));
             }
             // Not valid
             None
@@ -567,7 +625,7 @@ impl Tracker {
         obj: &mut ObjInfo,
         addr: u32,
         reloc_kind: ObjRelocKind,
-    ) -> Option<usize> {
+    ) -> Option<SymbolIndex> {
         if !matches!(
             reloc_kind,
             ObjRelocKind::PpcAddr16Ha | ObjRelocKind::PpcAddr16Lo
@@ -583,7 +641,7 @@ impl Tracker {
         //         return generate_special_symbol(obj, addr, &name).ok();
         //     }
         // }
-        let mut check_symbol = |opt: Option<u32>, name: &str| -> Option<usize> {
+        let mut check_symbol = |opt: Option<u32>, name: &str| -> Option<SymbolIndex> {
             if let Some(value) = opt {
                 if addr == value {
                     return generate_special_symbol(obj, value, name).ok();
@@ -808,7 +866,7 @@ fn data_kind_from_op(op: Opcode) -> DataKind {
     }
 }
 
-fn generate_special_symbol(obj: &mut ObjInfo, addr: u32, name: &str) -> Result<usize> {
+fn generate_special_symbol(obj: &mut ObjInfo, addr: u32, name: &str) -> Result<SymbolIndex> {
     obj.add_symbol(
         ObjSymbol {
             name: name.to_string(),

src/analysis/vm.rs

@@ -208,11 +208,11 @@ impl VM {
                     (
                         GprValue::Address(RelocationTarget::Address(left)),
                         GprValue::Constant(right),
-                    ) => GprValue::Address(RelocationTarget::Address(left + right)),
+                    ) => GprValue::Address(RelocationTarget::Address(left.wrapping_add(right))),
                     (
                         GprValue::Constant(left),
                         GprValue::Address(RelocationTarget::Address(right)),
-                    ) => GprValue::Address(RelocationTarget::Address(right + left)),
+                    ) => GprValue::Address(RelocationTarget::Address(right.wrapping_add(left))),
                     _ => GprValue::Unknown,
                 };
                 self.gpr[ins.field_rd() as usize].set_direct(value);

src/cmd/alf.rs

@@ -1,18 +1,18 @@
-use std::{
-    io::{stdout, Write},
-    path::PathBuf,
-};
+use std::io::{stdout, Write};
 
 use anyhow::Result;
 use argp::FromArgs;
+use typed_path::Utf8NativePathBuf;
 
 use crate::{
     cmd,
     util::{
         alf::AlfFile,
-        file::{buf_writer, map_file},
+        file::buf_writer,
+        path::native_path,
         reader::{Endian, FromReader},
     },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -34,21 +34,21 @@ enum SubCommand {
 /// Prints information about an alf file. (Same as `dol info`)
 #[argp(subcommand, name = "info")]
 pub struct InfoArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// alf file
-    file: PathBuf,
+    file: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Extracts symbol hashes from an alf file.
 #[argp(subcommand, name = "hashes")]
 pub struct HashesArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// alf file
-    alf_file: PathBuf,
-    #[argp(positional)]
+    alf_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// output file
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 pub fn run(args: Args) -> Result<()> {
@@ -60,11 +60,10 @@ pub fn run(args: Args) -> Result<()> {
 
 fn hashes(args: HashesArgs) -> Result<()> {
     let alf_file = {
-        let file = map_file(&args.alf_file)?;
-        let mut reader = file.as_reader();
-        AlfFile::from_reader(&mut reader, Endian::Little)?
+        let mut file = open_file(&args.alf_file, true)?;
+        AlfFile::from_reader(file.as_mut(), Endian::Little)?
     };
-    let mut w: Box<dyn Write> = if let Some(output) = args.output {
+    let mut w: Box<dyn Write> = if let Some(output) = &args.output {
         Box::new(buf_writer(output)?)
     } else {
         Box::new(stdout())

src/cmd/ar.rs

@@ -2,14 +2,20 @@ use std::{
     collections::{btree_map::Entry, BTreeMap},
     fs::File,
     io::Write,
-    path::PathBuf,
 };
 
 use anyhow::{anyhow, bail, Context, Result};
 use argp::FromArgs;
 use object::{Object, ObjectSymbol, SymbolScope};
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::file::{buf_writer, map_file, map_file_basic, process_rsp};
+use crate::{
+    util::{
+        file::{buf_writer, process_rsp},
+        path::native_path,
+    },
+    vfs::open_file,
+};
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing static libraries.
@@ -30,24 +36,24 @@ enum SubCommand {
 /// Creates a static library.
 #[argp(subcommand, name = "create")]
 pub struct CreateArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// output file
-    out: PathBuf,
-    #[argp(positional)]
+    out: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// input files
-    files: Vec<PathBuf>,
+    files: Vec<Utf8NativePathBuf>,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Extracts a static library.
 #[argp(subcommand, name = "extract")]
 pub struct ExtractArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input files
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// output directory
-    out: Option<PathBuf>,
+    out: Option<Utf8NativePathBuf>,
     #[argp(switch, short = 'q')]
     /// quiet output
     quiet: bool,
@@ -71,17 +77,16 @@ fn create(args: CreateArgs) -> Result<()> {
     let mut identifiers = Vec::with_capacity(files.len());
     let mut symbol_table = BTreeMap::new();
     for path in &files {
-        let path_str =
-            path.to_str().ok_or_else(|| anyhow!("'{}' is not valid UTF-8", path.display()))?;
-        let identifier = path_str.as_bytes().to_vec();
+        let unix_path = path.with_unix_encoding();
+        let identifier = unix_path.as_str().as_bytes().to_vec();
         identifiers.push(identifier.clone());
 
         let entries = match symbol_table.entry(identifier) {
             Entry::Vacant(e) => e.insert(Vec::new()),
-            Entry::Occupied(_) => bail!("Duplicate file name '{path_str}'"),
+            Entry::Occupied(_) => bail!("Duplicate file name '{unix_path}'"),
         };
-        let file = map_file_basic(path)?;
-        let obj = object::File::parse(file.as_slice())?;
+        let mut file = open_file(path, false)?;
+        let obj = object::File::parse(file.map()?)?;
         for symbol in obj.symbols() {
             if symbol.scope() == SymbolScope::Dynamic {
                 entries.push(symbol.name_bytes()?.to_vec());
@@ -99,10 +104,8 @@ fn create(args: CreateArgs) -> Result<()> {
         symbol_table,
     )?;
     for path in files {
-        let path_str =
-            path.to_str().ok_or_else(|| anyhow!("'{}' is not valid UTF-8", path.display()))?;
         let mut file = File::open(&path)?;
-        builder.append_file(path_str.as_bytes(), &mut file)?;
+        builder.append_file(path.as_str().as_bytes(), &mut file)?;
     }
     builder.into_inner()?.flush()?;
     Ok(())
@@ -115,7 +118,8 @@ fn extract(args: ExtractArgs) -> Result<()> {
     // Extract files
     let mut num_files = 0;
     for path in &files {
-        let mut out_dir = if let Some(out) = &args.out { out.clone() } else { PathBuf::new() };
+        let mut out_dir =
+            if let Some(out) = &args.out { out.clone() } else { Utf8NativePathBuf::new() };
         // If there are multiple files, extract to separate directories
         if files.len() > 1 {
             out_dir
@@ -123,14 +127,13 @@ fn extract(args: ExtractArgs) -> Result<()> {
         }
         std::fs::create_dir_all(&out_dir)?;
         if !args.quiet {
-            println!("Extracting {} to {}", path.display(), out_dir.display());
+            println!("Extracting {} to {}", path, out_dir);
         }
 
-        let file = map_file(path)?;
-        let mut archive = ar::Archive::new(file.as_slice());
+        let mut file = open_file(path, false)?;
+        let mut archive = ar::Archive::new(file.map()?);
         while let Some(entry) = archive.next_entry() {
-            let mut entry =
-                entry.with_context(|| format!("Processing entry in {}", path.display()))?;
+            let mut entry = entry.with_context(|| format!("Processing entry in {}", path))?;
             let file_name = std::str::from_utf8(entry.header().identifier())?;
             if !args.quiet && args.verbose {
                 println!("\t{}", file_name);
@@ -143,7 +146,7 @@ fn extract(args: ExtractArgs) -> Result<()> {
                 std::fs::create_dir_all(parent)?;
             }
             let mut file = File::create(&file_path)
-                .with_context(|| format!("Failed to create file {}", file_path.display()))?;
+                .with_context(|| format!("Failed to create file {}", file_path))?;
             std::io::copy(&mut entry, &mut file)?;
             file.flush()?;
 

src/cmd/dwarf.rs

@@ -2,7 +2,6 @@ use std::{
     collections::{btree_map, BTreeMap},
     io::{stdout, Cursor, Read, Write},
     ops::Bound::{Excluded, Unbounded},
-    path::PathBuf,
     str::from_utf8,
 };
 
@@ -15,13 +14,18 @@ use syntect::{
     highlighting::{Color, HighlightIterator, HighlightState, Highlighter, Theme, ThemeSet},
     parsing::{ParseState, ScopeStack, SyntaxReference, SyntaxSet},
 };
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
+use crate::{
+    util::{
         dwarf::{
             process_compile_unit, process_cu_tag, process_overlay_branch, read_debug_section,
             should_skip_tag, tag_type_string, AttributeKind, TagKind,
         },
-    file::{buf_writer, map_file},
+        file::buf_writer,
+        path::native_path,
+    },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -42,12 +46,12 @@ enum SubCommand {
 /// Dumps DWARF 1.1 info from an object or archive.
 #[argp(subcommand, name = "dump")]
 pub struct DumpArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// Input object. (ELF or archive)
-    in_file: PathBuf,
-    #[argp(option, short = 'o')]
+    in_file: Utf8NativePathBuf,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file. (Or directory, for archive)
-    out: Option<PathBuf>,
+    out: Option<Utf8NativePathBuf>,
     #[argp(switch)]
     /// Disable color output.
     no_color: bool,
@@ -73,8 +77,8 @@ fn dump(args: DumpArgs) -> Result<()> {
     let theme = theme_set.themes.get("Solarized (dark)").context("Failed to load theme")?;
     let syntax = syntax_set.find_syntax_by_name("C++").context("Failed to find syntax")?.clone();
 
-    let file = map_file(&args.in_file)?;
-    let buf = file.as_slice();
+    let mut file = open_file(&args.in_file, true)?;
+    let buf = file.map()?;
     if buf.starts_with(b"!<arch>\n") {
         let mut archive = ar::Archive::new(buf);
         while let Some(result) = archive.next_entry() {
@@ -101,7 +105,7 @@ fn dump(args: DumpArgs) -> Result<()> {
                 let name = name.trim_start_matches("D:").replace('\\', "/");
                 let name = name.rsplit_once('/').map(|(_, b)| b).unwrap_or(&name);
                 let file_path = out_path.join(format!("{}.txt", name));
-                let mut file = buf_writer(file_path)?;
+                let mut file = buf_writer(&file_path)?;
                 dump_debug_section(&args, &mut file, &obj_file, debug_section)?;
                 file.flush()?;
             } else if args.no_color {

src/cmd/elf.rs

@@ -3,7 +3,6 @@ use std::{
     fs,
     fs::DirBuilder,
     io::{Cursor, Write},
-    path::PathBuf,
 };
 
 use anyhow::{anyhow, bail, ensure, Context, Result};
@@ -15,6 +14,7 @@ use object::{
     FileFlags, Object, ObjectSection, ObjectSymbol, RelocationTarget, SectionFlags, SectionIndex,
     SectionKind, SymbolFlags, SymbolIndex, SymbolKind, SymbolScope, SymbolSection,
 };
+use typed_path::{Utf8NativePath, Utf8NativePathBuf};
 
 use crate::{
     obj::ObjKind,
@@ -24,6 +24,7 @@ use crate::{
         config::{write_splits_file, write_symbols_file},
         elf::{process_elf, write_elf},
         file::{buf_writer, process_rsp},
+        path::native_path,
         reader::{Endian, FromReader},
         signatures::{compare_signature, generate_signature, FunctionSignature},
         split::split_obj,
@@ -54,72 +55,72 @@ enum SubCommand {
 /// Disassembles an ELF file.
 #[argp(subcommand, name = "disasm")]
 pub struct DisasmArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file
-    elf_file: PathBuf,
-    #[argp(positional)]
+    elf_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// output file (.o) or directory (.elf)
-    out: PathBuf,
+    out: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Fixes issues with GNU assembler built object files.
 #[argp(subcommand, name = "fixup")]
 pub struct FixupArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file
-    in_file: PathBuf,
-    #[argp(positional)]
+    in_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// output file
-    out_file: PathBuf,
+    out_file: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Splits an executable ELF into relocatable objects.
 #[argp(subcommand, name = "split")]
 pub struct SplitArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file
-    in_file: PathBuf,
-    #[argp(positional)]
+    in_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// output directory
-    out_dir: PathBuf,
+    out_dir: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Generates configuration files from an executable ELF.
 #[argp(subcommand, name = "config")]
 pub struct ConfigArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file
-    in_file: PathBuf,
-    #[argp(positional)]
+    in_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// output directory
-    out_dir: PathBuf,
+    out_dir: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Builds function signatures from an ELF file.
 #[argp(subcommand, name = "sigs")]
 pub struct SignaturesArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file(s)
-    files: Vec<PathBuf>,
+    files: Vec<Utf8NativePathBuf>,
     #[argp(option, short = 's')]
     /// symbol name
     symbol: String,
-    #[argp(option, short = 'o')]
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// output yml
-    out_file: PathBuf,
+    out_file: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Prints information about an ELF file.
 #[argp(subcommand, name = "info")]
 pub struct InfoArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file
-    input: PathBuf,
+    input: Utf8NativePathBuf,
 }
 
 pub fn run(args: Args) -> Result<()> {
@@ -134,17 +135,17 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn config(args: ConfigArgs) -> Result<()> {
-    log::info!("Loading {}", args.in_file.display());
+    log::info!("Loading {}", args.in_file);
     let obj = process_elf(&args.in_file)?;
 
     DirBuilder::new().recursive(true).create(&args.out_dir)?;
-    write_symbols_file(args.out_dir.join("symbols.txt"), &obj, None)?;
-    write_splits_file(args.out_dir.join("splits.txt"), &obj, false, None)?;
+    write_symbols_file(&args.out_dir.join("symbols.txt"), &obj, None)?;
+    write_splits_file(&args.out_dir.join("splits.txt"), &obj, false, None)?;
     Ok(())
 }
 
 fn disasm(args: DisasmArgs) -> Result<()> {
-    log::info!("Loading {}", args.elf_file.display());
+    log::info!("Loading {}", args.elf_file);
     let obj = process_elf(&args.elf_file)?;
     match obj.kind {
         ObjKind::Executable => {
@@ -156,12 +157,12 @@ fn disasm(args: DisasmArgs) -> Result<()> {
             DirBuilder::new().recursive(true).create(&include_dir)?;
             fs::write(include_dir.join("macros.inc"), include_bytes!("../../assets/macros.inc"))?;
 
-            let mut files_out = buf_writer(args.out.join("link_order.txt"))?;
+            let mut files_out = buf_writer(&args.out.join("link_order.txt"))?;
             for (unit, split_obj) in obj.link_order.iter().zip(&split_objs) {
                 let out_path = asm_dir.join(file_name_from_unit(&unit.name, ".s"));
-                log::info!("Writing {}", out_path.display());
+                log::info!("Writing {}", out_path);
 
-                let mut w = buf_writer(out_path)?;
+                let mut w = buf_writer(&out_path)?;
                 write_asm(&mut w, split_obj)?;
                 w.flush()?;
 
@@ -170,7 +171,7 @@ fn disasm(args: DisasmArgs) -> Result<()> {
             files_out.flush()?;
         }
         ObjKind::Relocatable => {
-            let mut w = buf_writer(args.out)?;
+            let mut w = buf_writer(&args.out)?;
             write_asm(&mut w, &obj)?;
             w.flush()?;
         }
@@ -193,18 +194,17 @@ fn split(args: SplitArgs) -> Result<()> {
         };
     }
 
-    let mut rsp_file = buf_writer("rsp")?;
+    let mut rsp_file = buf_writer(Utf8NativePath::new("rsp"))?;
     for unit in &obj.link_order {
         let object = file_map
             .get(&unit.name)
             .ok_or_else(|| anyhow!("Failed to find object file for unit '{}'", unit.name))?;
         let out_path = args.out_dir.join(file_name_from_unit(&unit.name, ".o"));
-        writeln!(rsp_file, "{}", out_path.display())?;
+        writeln!(rsp_file, "{}", out_path)?;
         if let Some(parent) = out_path.parent() {
             DirBuilder::new().recursive(true).create(parent)?;
         }
-        fs::write(&out_path, object)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+        fs::write(&out_path, object).with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     rsp_file.flush()?;
     Ok(())
@@ -237,7 +237,7 @@ const ASM_SUFFIX: &str = " (asm)";
 
 fn fixup(args: FixupArgs) -> Result<()> {
     let in_buf = fs::read(&args.in_file)
-        .with_context(|| format!("Failed to open input file: '{}'", args.in_file.display()))?;
+        .with_context(|| format!("Failed to open input file: '{}'", args.in_file))?;
     let in_file = object::read::File::parse(&*in_buf).context("Failed to parse input ELF")?;
     let mut out_file =
         object::write::Object::new(in_file.format(), in_file.architecture(), in_file.endianness());
@@ -262,10 +262,7 @@ fn fixup(args: FixupArgs) -> Result<()> {
         let file_name = args
             .in_file
             .file_name()
-            .ok_or_else(|| anyhow!("'{}' is not a file path", args.in_file.display()))?;
-        let file_name = file_name
-            .to_str()
-            .ok_or_else(|| anyhow!("'{}' is not valid UTF-8", file_name.to_string_lossy()))?;
+            .ok_or_else(|| anyhow!("'{}' is not a file path", args.in_file))?;
         let mut name_bytes = file_name.as_bytes().to_vec();
         name_bytes.append(&mut ASM_SUFFIX.as_bytes().to_vec());
         out_file.add_symbol(object::write::Symbol {
@@ -281,7 +278,7 @@ fn fixup(args: FixupArgs) -> Result<()> {
     }
 
     // Write section symbols & sections
-    let mut section_ids: Vec<Option<SectionId>> = vec![];
+    let mut section_ids: Vec<Option<SectionId>> = vec![None /* ELF null section */];
     for section in in_file.sections() {
         // Skip empty sections or metadata sections
         if section.size() == 0 || section.kind() == SectionKind::Metadata {
@@ -304,11 +301,11 @@ fn fixup(args: FixupArgs) -> Result<()> {
     }
 
     // Write symbols
-    let mut symbol_ids: Vec<Option<SymbolId>> = vec![];
+    let mut symbol_ids: Vec<Option<SymbolId>> = vec![None /* ELF null symbol */];
     let mut addr_to_sym: BTreeMap<SectionId, BTreeMap<u32, SymbolId>> = BTreeMap::new();
     for symbol in in_file.symbols() {
         // Skip section and file symbols, we wrote them above
-        if matches!(symbol.kind(), SymbolKind::Section | SymbolKind::File | SymbolKind::Null) {
+        if matches!(symbol.kind(), SymbolKind::Section | SymbolKind::File) {
             symbol_ids.push(None);
             continue;
         }
@@ -445,7 +442,7 @@ fn signatures(args: SignaturesArgs) -> Result<()> {
 
     let mut signatures: HashMap<String, FunctionSignature> = HashMap::new();
     for path in files {
-        log::info!("Processing {}", path.display());
+        log::info!("Processing {}", path);
         let signature = match generate_signature(&path, &args.symbol) {
             Ok(Some(signature)) => signature,
             Ok(None) => continue,
@@ -472,7 +469,7 @@ fn signatures(args: SignaturesArgs) -> Result<()> {
 
 fn info(args: InfoArgs) -> Result<()> {
     let in_buf = fs::read(&args.input)
-        .with_context(|| format!("Failed to open input file: '{}'", args.input.display()))?;
+        .with_context(|| format!("Failed to open input file: '{}'", args.input))?;
     let in_file = object::read::File::parse(&*in_buf).context("Failed to parse input ELF")?;
 
     println!("ELF type: {:?}", in_file.kind());
@@ -488,7 +485,7 @@ fn info(args: InfoArgs) -> Result<()> {
         "{: >15} | {: <10} | {: <10} | {: <10} | {: <10}",
         "Name", "Type", "Size", "File Off", "Index"
     );
-    for section in in_file.sections().skip(1) {
+    for section in in_file.sections() {
         let kind_str = match section.kind() {
             SectionKind::Text => "code".to_cow(),
             SectionKind::Data => "data".to_cow(),
@@ -565,6 +562,7 @@ fn info(args: InfoArgs) -> Result<()> {
             );
             println!("\tUnsafe global reg vars: {}", header.unsafe_global_reg_vars);
             println!("\n{: >10} | {: <6} | {: <6} | {: <10}", "Align", "Vis", "Active", "Symbol");
+            CommentSym::from_reader(&mut reader, Endian::Big)?; // ELF null symbol
             for symbol in in_file.symbols() {
                 let comment_sym = CommentSym::from_reader(&mut reader, Endian::Big)?;
                 if symbol.is_definition() {
@@ -603,7 +601,7 @@ fn info(args: InfoArgs) -> Result<()> {
             if let Some(virtual_addresses) = &meta.virtual_addresses {
                 println!("\tVirtual addresses:");
                 println!("\t{: >10} | {: <10}", "Addr", "Symbol");
-                for (symbol, addr) in in_file.symbols().zip(virtual_addresses) {
+                for (symbol, addr) in in_file.symbols().zip(virtual_addresses.iter().skip(1)) {
                     if symbol.is_definition() {
                         println!("\t{: >10} | {: <10}", format!("{:#X}", addr), symbol.name()?);
                     }

src/cmd/elf2dol.rs

@@ -1,24 +1,28 @@
-use std::{
-    io::{Seek, SeekFrom, Write},
-    path::PathBuf,
-};
+use std::io::{Seek, SeekFrom, Write};
 
 use anyhow::{anyhow, bail, ensure, Result};
 use argp::FromArgs;
 use object::{Architecture, Endianness, Object, ObjectKind, ObjectSection, SectionKind};
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::file::{buf_writer, map_file};
+use crate::{
+    util::{file::buf_writer, path::native_path},
+    vfs::open_file,
+};
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Converts an ELF file to a DOL file.
 #[argp(subcommand, name = "elf2dol")]
 pub struct Args {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// path to input ELF
-    elf_file: PathBuf,
-    #[argp(positional)]
+    elf_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// path to output DOL
-    dol_file: PathBuf,
+    dol_file: Utf8NativePathBuf,
+    /// sections (by name) to ignore
+    #[argp(option, long = "ignore")]
+    deny_sections: Vec<String>,
 }
 
 #[derive(Debug, Clone, Default)]
@@ -43,8 +47,8 @@ const MAX_TEXT_SECTIONS: usize = 7;
 const MAX_DATA_SECTIONS: usize = 11;
 
 pub fn run(args: Args) -> Result<()> {
-    let file = map_file(&args.elf_file)?;
-    let obj_file = object::read::File::parse(file.as_slice())?;
+    let mut file = open_file(&args.elf_file, true)?;
+    let obj_file = object::read::File::parse(file.map()?)?;
     match obj_file.architecture() {
         Architecture::PowerPc => {}
         arch => bail!("Unexpected architecture: {arch:?}"),
@@ -61,9 +65,11 @@ pub fn run(args: Args) -> Result<()> {
     out.seek(SeekFrom::Start(offset as u64))?;
 
     // Text sections
-    for section in
-        obj_file.sections().filter(|s| section_kind(s) == SectionKind::Text && is_alloc(s.flags()))
-    {
+    for section in obj_file.sections().filter(|s| {
+        section_kind(s) == SectionKind::Text
+            && is_alloc(s.flags())
+            && is_name_allowed(s, &args.deny_sections)
+    }) {
         log::debug!("Processing text section '{}'", section.name().unwrap_or("[error]"));
         let address = section.address() as u32;
         let size = align32(section.size() as u32);
@@ -79,9 +85,11 @@ pub fn run(args: Args) -> Result<()> {
     }
 
     // Data sections
-    for section in
-        obj_file.sections().filter(|s| section_kind(s) == SectionKind::Data && is_alloc(s.flags()))
-    {
+    for section in obj_file.sections().filter(|s| {
+        section_kind(s) == SectionKind::Data
+            && is_alloc(s.flags())
+            && is_name_allowed(s, &args.deny_sections)
+    }) {
         log::debug!("Processing data section '{}'", section.name().unwrap_or("[error]"));
         let address = section.address() as u32;
         let size = align32(section.size() as u32);
@@ -97,10 +105,11 @@ pub fn run(args: Args) -> Result<()> {
     }
 
     // BSS sections
-    for section in obj_file
-        .sections()
-        .filter(|s| section_kind(s) == SectionKind::UninitializedData && is_alloc(s.flags()))
-    {
+    for section in obj_file.sections().filter(|s| {
+        section_kind(s) == SectionKind::UninitializedData
+            && is_alloc(s.flags())
+            && is_name_allowed(s, &args.deny_sections)
+    }) {
         let address = section.address() as u32;
         let size = section.size() as u32;
         if header.bss_address == 0 {
@@ -184,3 +193,8 @@ fn section_kind(section: &object::Section) -> SectionKind {
 fn is_alloc(flags: object::SectionFlags) -> bool {
     matches!(flags, object::SectionFlags::Elf { sh_flags } if sh_flags & object::elf::SHF_ALLOC as u64 != 0)
 }
+
+#[inline]
+fn is_name_allowed(s: &object::Section, denied: &[String]) -> bool {
+    !denied.contains(&s.name().unwrap_or("[error]").to_string())
+}

src/cmd/map.rs

@@ -1,12 +1,19 @@
-use std::path::PathBuf;
+use std::fs::DirBuilder;
 
 use anyhow::{bail, ensure, Result};
 use argp::FromArgs;
 use cwdemangle::{demangle, DemangleOptions};
+use tracing::error;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::map_file,
-    map::{process_map, SymbolEntry, SymbolRef},
+use crate::{
+    util::{
+        config::{write_splits_file, write_symbols_file},
+        map::{create_obj, process_map, SymbolEntry, SymbolRef},
+        path::native_path,
+        split::update_splits,
+    },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -22,15 +29,16 @@ pub struct Args {
 enum SubCommand {
     Entries(EntriesArgs),
     Symbol(SymbolArgs),
+    Config(ConfigArgs),
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Displays all entries for a particular TU.
 #[argp(subcommand, name = "entries")]
 pub struct EntriesArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// path to input map
-    map_file: PathBuf,
+    map_file: Utf8NativePathBuf,
     #[argp(positional)]
     /// TU to display entries for
     unit: String,
@@ -40,24 +48,37 @@ pub struct EntriesArgs {
 /// Displays all references to a symbol.
 #[argp(subcommand, name = "symbol")]
 pub struct SymbolArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// path to input map
-    map_file: PathBuf,
+    map_file: Utf8NativePathBuf,
     #[argp(positional)]
     /// symbol to display references for
     symbol: String,
 }
 
+#[derive(FromArgs, PartialEq, Eq, Debug)]
+/// Generates project configuration files from a map. (symbols.txt, splits.txt)
+#[argp(subcommand, name = "config")]
+pub struct ConfigArgs {
+    #[argp(positional, from_str_fn(native_path))]
+    /// path to input map
+    map_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
+    /// output directory for symbols.txt and splits.txt
+    out_dir: Utf8NativePathBuf,
+}
+
 pub fn run(args: Args) -> Result<()> {
     match args.command {
         SubCommand::Entries(c_args) => entries(c_args),
         SubCommand::Symbol(c_args) => symbol(c_args),
+        SubCommand::Config(c_args) => config(c_args),
     }
 }
 
 fn entries(args: EntriesArgs) -> Result<()> {
-    let file = map_file(&args.map_file)?;
-    let entries = process_map(&mut file.as_reader(), None, None)?;
+    let mut file = open_file(&args.map_file, true)?;
+    let entries = process_map(file.as_mut(), None, None)?;
     match entries.unit_entries.get_vec(&args.unit) {
         Some(vec) => {
             println!("Entries for {}:", args.unit);
@@ -87,9 +108,9 @@ fn entries(args: EntriesArgs) -> Result<()> {
 }
 
 fn symbol(args: SymbolArgs) -> Result<()> {
-    let file = map_file(&args.map_file)?;
+    let mut file = open_file(&args.map_file, true)?;
     log::info!("Processing map...");
-    let entries = process_map(&mut file.as_reader(), None, None)?;
+    let entries = process_map(file.as_mut(), None, None)?;
     log::info!("Done!");
     let mut opt_ref: Option<(String, SymbolEntry)> = None;
 
@@ -160,3 +181,18 @@ fn symbol(args: SymbolArgs) -> Result<()> {
     println!("\n");
     Ok(())
 }
+
+fn config(args: ConfigArgs) -> Result<()> {
+    let mut file = open_file(&args.map_file, true)?;
+    log::info!("Processing map...");
+    let entries = process_map(file.as_mut(), None, None)?;
+    let mut obj = create_obj(&entries)?;
+    if let Err(e) = update_splits(&mut obj, None, false) {
+        error!("Failed to update splits: {}", e)
+    }
+    DirBuilder::new().recursive(true).create(&args.out_dir)?;
+    write_symbols_file(&args.out_dir.join("symbols.txt"), &obj, None)?;
+    write_splits_file(&args.out_dir.join("splits.txt"), &obj, false, None)?;
+    log::info!("Done!");
+    Ok(())
+}

src/cmd/metroidbuildinfo.rs

@@ -1,48 +0,0 @@
-use std::path::PathBuf;
-
-use anyhow::{bail, ensure, Context, Result};
-use argp::FromArgs;
-use memchr::memmem;
-use memmap2::MmapOptions;
-
-#[derive(FromArgs, PartialEq, Eq, Debug)]
-/// Sets the MetroidBuildInfo tag value in a given binary.
-#[argp(subcommand, name = "metroidbuildinfo")]
-pub struct Args {
-    #[argp(positional)]
-    /// path to source binary
-    binary: PathBuf,
-    #[argp(positional)]
-    /// path to build info string
-    build_info: PathBuf,
-}
-
-const BUILD_STRING_MAX: usize = 35;
-const BUILD_STRING_TAG: &str = "!#$MetroidBuildInfo!#$";
-
-pub fn run(args: Args) -> Result<()> {
-    let build_string = std::fs::read_to_string(&args.build_info).with_context(|| {
-        format!("Failed to read build info string from '{}'", args.build_info.display())
-    })?;
-    let build_string_trim = build_string.trim_end();
-    let build_string_bytes = build_string_trim.as_bytes();
-    ensure!(
-        build_string_bytes.len() <= BUILD_STRING_MAX,
-        "Build string '{build_string_trim}' is greater than maximum size of {BUILD_STRING_MAX}"
-    );
-
-    let binary_file =
-        std::fs::File::options().read(true).write(true).open(&args.binary).with_context(|| {
-            format!("Failed to open binary for writing: '{}'", args.binary.display())
-        })?;
-    let mut map = unsafe { MmapOptions::new().map_mut(&binary_file) }
-        .with_context(|| format!("Failed to mmap binary: '{}'", args.binary.display()))?;
-    let start = match memmem::find(&map, BUILD_STRING_TAG.as_bytes()) {
-        Some(idx) => idx + BUILD_STRING_TAG.as_bytes().len(),
-        None => bail!("Failed to find build string tag in binary"),
-    };
-    let end = start + build_string_bytes.len();
-    map[start..end].copy_from_slice(build_string_bytes);
-    map[end] = 0;
-    Ok(())
-}

src/cmd/mod.rs

@@ -7,12 +7,12 @@ pub mod dwarf;
 pub mod elf;
 pub mod elf2dol;
 pub mod map;
-pub mod metroidbuildinfo;
 pub mod nlzss;
 pub mod rarc;
 pub mod rel;
 pub mod rso;
 pub mod shasum;
 pub mod u8_arc;
+pub mod vfs;
 pub mod yay0;
 pub mod yaz0;

src/cmd/nlzss.rs

@@ -1,11 +1,12 @@
-use std::{fs, path::PathBuf};
+use std::fs;
 
 use anyhow::{anyhow, Context, Result};
 use argp::FromArgs;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::{open_file, process_rsp},
-    IntoCow, ToCow,
+use crate::{
+    util::{file::process_rsp, nlzss, path::native_path, IntoCow, ToCow},
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -26,13 +27,13 @@ enum SubCommand {
 /// Decompresses NLZSS-compressed files.
 #[argp(subcommand, name = "decompress")]
 pub struct DecompressArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// NLZSS-compressed file(s)
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file (or directory, if multiple files are specified).
     /// If not specified, decompresses in-place.
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 pub fn run(args: Args) -> Result<()> {
@@ -45,8 +46,9 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let files = process_rsp(&args.files)?;
     let single_file = files.len() == 1;
     for path in files {
-        let data = nintendo_lz::decompress(&mut open_file(&path)?)
-            .map_err(|e| anyhow!("Failed to decompress '{}' with NLZSS: {}", path.display(), e))?;
+        let mut file = open_file(&path, false)?;
+        let data = nlzss::decompress(file.as_mut())
+            .map_err(|e| anyhow!("Failed to decompress '{}' with NLZSS: {}", path, e))?;
         let out_path = if let Some(output) = &args.output {
             if single_file {
                 output.as_path().to_cow()
@@ -57,7 +59,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
             path.as_path().to_cow()
         };
         fs::write(out_path.as_ref(), data)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     Ok(())
 }

src/cmd/rarc.rs

@@ -1,12 +1,9 @@
-use std::{fs, fs::DirBuilder, path::PathBuf};
-
-use anyhow::{Context, Result};
+use anyhow::Result;
 use argp::FromArgs;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::{decompress_if_needed, map_file},
-    rarc::{Node, RarcReader},
-};
+use super::vfs;
+use crate::util::path::native_path;
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing RSO files.
@@ -27,23 +24,29 @@ enum SubCommand {
 /// Views RARC file information.
 #[argp(subcommand, name = "list")]
 pub struct ListArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// RARC file
-    file: PathBuf,
+    file: Utf8NativePathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    short: bool,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Extracts RARC file contents.
 #[argp(subcommand, name = "extract")]
 pub struct ExtractArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// RARC file
-    file: PathBuf,
-    #[argp(option, short = 'o')]
+    file: Utf8NativePathBuf,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// output directory
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    no_decompress: bool,
     #[argp(switch, short = 'q')]
-    /// quiet output
+    /// Quiet output. Don't print anything except errors.
     quiet: bool,
 }
 
@@ -55,71 +58,16 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn list(args: ListArgs) -> Result<()> {
-    let file = map_file(&args.file)?;
-    let rarc = RarcReader::new(&mut file.as_reader())
-        .with_context(|| format!("Failed to process RARC file '{}'", args.file.display()))?;
-
-    let mut current_path = PathBuf::new();
-    for node in rarc.nodes() {
-        match node {
-            Node::DirectoryBegin { name } => {
-                current_path.push(name.name);
-            }
-            Node::DirectoryEnd { name: _ } => {
-                current_path.pop();
-            }
-            Node::File { name, offset, size } => {
-                let path = current_path.join(name.name);
-                println!("{}: {} bytes, offset {:#X}", path.display(), size, offset);
-            }
-            Node::CurrentDirectory => {}
-            Node::ParentDirectory => {}
-        }
-    }
-    Ok(())
+    let path = Utf8NativePathBuf::from(format!("{}:", args.file));
+    vfs::ls(vfs::LsArgs { path, short: args.short, recursive: true })
 }
 
 fn extract(args: ExtractArgs) -> Result<()> {
-    let file = map_file(&args.file)?;
-    let rarc = RarcReader::new(&mut file.as_reader())
-        .with_context(|| format!("Failed to process RARC file '{}'", args.file.display()))?;
-
-    let mut current_path = PathBuf::new();
-    for node in rarc.nodes() {
-        match node {
-            Node::DirectoryBegin { name } => {
-                current_path.push(name.name);
-            }
-            Node::DirectoryEnd { name: _ } => {
-                current_path.pop();
-            }
-            Node::File { name, offset, size } => {
-                let file_data = decompress_if_needed(
-                    &file.as_slice()[offset as usize..offset as usize + size as usize],
-                )?;
-                let file_path = current_path.join(&name.name);
-                let output_path = args
-                    .output
-                    .as_ref()
-                    .map(|p| p.join(&file_path))
-                    .unwrap_or_else(|| file_path.clone());
-                if !args.quiet {
-                    println!(
-                        "Extracting {} to {} ({} bytes)",
-                        file_path.display(),
-                        output_path.display(),
-                        size
-                    );
-                }
-                if let Some(parent) = output_path.parent() {
-                    DirBuilder::new().recursive(true).create(parent)?;
-                }
-                fs::write(&output_path, file_data)
-                    .with_context(|| format!("Failed to write file '{}'", output_path.display()))?;
-            }
-            Node::CurrentDirectory => {}
-            Node::ParentDirectory => {}
-        }
-    }
-    Ok(())
+    let path = Utf8NativePathBuf::from(format!("{}:", args.file));
+    let output = args.output.unwrap_or_else(|| Utf8NativePathBuf::from("."));
+    vfs::cp(vfs::CpArgs {
+        paths: vec![path, output],
+        no_decompress: args.no_decompress,
+        quiet: args.quiet,
+    })
 }

src/cmd/rel.rs

@@ -1,8 +1,7 @@
 use std::{
     collections::{btree_map, BTreeMap},
     fs,
-    io::Write,
-    path::PathBuf,
+    io::{Cursor, Write},
     time::Instant,
 };
 
@@ -15,6 +14,7 @@ use object::{
 use rayon::prelude::*;
 use rustc_hash::FxHashMap;
 use tracing::{info, info_span};
+use typed_path::Utf8NativePathBuf;
 
 use crate::{
     analysis::{
@@ -27,20 +27,25 @@ use crate::{
         tracker::Tracker,
     },
     array_ref_mut,
-    cmd::dol::{ModuleConfig, ProjectConfig},
-    obj::{ObjInfo, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbol},
+    cmd::dol::{find_object_base, ModuleConfig, ObjectBase, ProjectConfig},
+    obj::{
+        ObjInfo, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbol,
+        SectionIndex as ObjSectionIndex,
+    },
     util::{
         config::{is_auto_symbol, read_splits_sections, SectionDef},
         dol::process_dol,
         elf::{to_obj_reloc_kind, write_elf},
-        file::{buf_reader, buf_writer, map_file, process_rsp, verify_hash, FileIterator},
+        file::{buf_writer, process_rsp, verify_hash, FileIterator},
         nested::NestedMap,
+        path::native_path,
         rel::{
             print_relocations, process_rel, process_rel_header, process_rel_sections, write_rel,
             RelHeader, RelReloc, RelSectionHeader, RelWriteInfo, PERMITTED_SECTIONS,
         },
         IntoCow, ToCow,
     },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -63,9 +68,9 @@ enum SubCommand {
 /// Views REL file information.
 #[argp(subcommand, name = "info")]
 pub struct InfoArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// REL file
-    rel_file: PathBuf,
+    rel_file: Utf8NativePathBuf,
     #[argp(switch, short = 'r')]
     /// print relocations
     relocations: bool,
@@ -75,27 +80,27 @@ pub struct InfoArgs {
 /// Merges a DOL + REL(s) into an ELF.
 #[argp(subcommand, name = "merge")]
 pub struct MergeArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// DOL file
-    dol_file: PathBuf,
-    #[argp(positional)]
+    dol_file: Utf8NativePathBuf,
+    #[argp(positional, from_str_fn(native_path))]
     /// REL file(s)
-    rel_files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    rel_files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// output ELF
-    out_file: PathBuf,
+    out_file: Utf8NativePathBuf,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Creates RELs from an ELF + PLF(s).
 #[argp(subcommand, name = "make")]
 pub struct MakeArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// input file(s)
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'c')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'c', from_str_fn(native_path))]
     /// (optional) project configuration file
-    config: Option<PathBuf>,
+    config: Option<Utf8NativePathBuf>,
     #[argp(option, short = 'n')]
     /// (optional) module names
     names: Vec<String>,
@@ -162,16 +167,17 @@ fn match_section_index(
     //     })
 }
 
-fn load_rel(module_config: &ModuleConfig) -> Result<RelInfo> {
-    let file = map_file(&module_config.object)?;
+fn load_rel(module_config: &ModuleConfig, object_base: &ObjectBase) -> Result<RelInfo> {
+    let mut file = object_base.open(&module_config.object)?;
+    let data = file.map()?;
     if let Some(hash_str) = &module_config.hash {
-        verify_hash(file.as_slice(), hash_str)?;
+        verify_hash(data, hash_str)?;
     }
-    let mut reader = file.as_reader();
+    let mut reader = Cursor::new(data);
     let header = process_rel_header(&mut reader)?;
     let sections = process_rel_sections(&mut reader, &header)?;
     let section_defs = if let Some(splits_path) = &module_config.splits {
-        read_splits_sections(splits_path)?
+        read_splits_sections(&splits_path.with_encoding())?
     } else {
         None
     };
@@ -181,7 +187,7 @@ fn load_rel(module_config: &ModuleConfig) -> Result<RelInfo> {
 struct LoadedModule<'a> {
     module_id: u32,
     file: File<'a>,
-    path: PathBuf,
+    path: Utf8NativePathBuf,
 }
 
 fn resolve_relocations(
@@ -261,15 +267,19 @@ fn make(args: MakeArgs) -> Result<()> {
     let mut existing_headers = BTreeMap::<u32, RelInfo>::new();
     let mut name_to_module_id = FxHashMap::<String, u32>::default();
     if let Some(config_path) = &args.config {
-        let config: ProjectConfig = serde_yaml::from_reader(&mut buf_reader(config_path)?)?;
+        let config: ProjectConfig = {
+            let mut file = open_file(config_path, true)?;
+            serde_yaml::from_reader(file.as_mut())?
+        };
+        let object_base = find_object_base(&config)?;
         for module_config in &config.modules {
             let module_name = module_config.name();
-            if !args.names.is_empty() && !args.names.iter().any(|n| n == &module_name) {
+            if !args.names.is_empty() && !args.names.iter().any(|n| n == module_name) {
                 continue;
             }
             let _span = info_span!("module", name = %module_name).entered();
-            let info = load_rel(module_config).with_context(|| {
-                format!("While loading REL '{}'", module_config.object.display())
+            let info = load_rel(module_config, &object_base).with_context(|| {
+                format!("While loading REL '{}'", object_base.join(&module_config.object))
             })?;
             name_to_module_id.insert(module_name.to_string(), info.0.module_id);
             match existing_headers.entry(info.0.module_id) {
@@ -287,9 +297,9 @@ fn make(args: MakeArgs) -> Result<()> {
     }
 
     // Load all modules
-    let files = paths.iter().map(map_file).collect::<Result<Vec<_>>>()?;
+    let mut files = paths.iter().map(|p| open_file(p, true)).collect::<Result<Vec<_>>>()?;
     let modules = files
-        .par_iter()
+        .par_iter_mut()
         .enumerate()
         .zip(&paths)
         .map(|((idx, file), path)| {
@@ -301,9 +311,9 @@ fn make(args: MakeArgs) -> Result<()> {
                 .and_then(|n| name_to_module_id.get(n))
                 .copied()
                 .unwrap_or(idx as u32);
-            load_obj(file.as_slice())
+            load_obj(file.map()?)
                 .map(|o| LoadedModule { module_id, file: o, path: path.clone() })
-                .with_context(|| format!("Failed to load '{}'", path.display()))
+                .with_context(|| format!("Failed to load '{}'", path))
         })
         .collect::<Result<Vec<_>>>()?;
 
@@ -311,7 +321,7 @@ fn make(args: MakeArgs) -> Result<()> {
     let start = Instant::now();
     let mut symbol_map = FxHashMap::<&[u8], (u32, SymbolIndex)>::default();
     for module_info in modules.iter() {
-        let _span = info_span!("file", path = %module_info.path.display()).entered();
+        let _span = info_span!("file", path = %module_info.path).entered();
         for symbol in module_info.file.symbols() {
             if symbol.scope() == object::SymbolScope::Dynamic {
                 symbol_map
@@ -326,7 +336,7 @@ fn make(args: MakeArgs) -> Result<()> {
     let mut relocations = Vec::<Vec<RelReloc>>::with_capacity(modules.len() - 1);
     relocations.resize_with(modules.len() - 1, Vec::new);
     for (module_info, relocations) in modules.iter().skip(1).zip(&mut relocations) {
-        let _span = info_span!("file", path = %module_info.path.display()).entered();
+        let _span = info_span!("file", path = %module_info.path).entered();
         resolved += resolve_relocations(
             &module_info.file,
             &existing_headers,
@@ -335,9 +345,7 @@ fn make(args: MakeArgs) -> Result<()> {
             &modules,
             relocations,
         )
-        .with_context(|| {
-            format!("While resolving relocations in '{}'", module_info.path.display())
-        })?;
+        .with_context(|| format!("While resolving relocations in '{}'", module_info.path))?;
     }
 
     if !args.quiet {
@@ -353,7 +361,7 @@ fn make(args: MakeArgs) -> Result<()> {
     // Write RELs
     let start = Instant::now();
     for (module_info, relocations) in modules.iter().skip(1).zip(relocations) {
-        let _span = info_span!("file", path = %module_info.path.display()).entered();
+        let _span = info_span!("file", path = %module_info.path).entered();
         let mut info = RelWriteInfo {
             module_id: module_info.module_id,
             version: 3,
@@ -384,7 +392,7 @@ fn make(args: MakeArgs) -> Result<()> {
         let rel_path = module_info.path.with_extension("rel");
         let mut w = buf_writer(&rel_path)?;
         write_rel(&mut w, &info, &module_info.file, relocations)
-            .with_context(|| format!("Failed to write '{}'", rel_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", rel_path))?;
         w.flush()?;
     }
 
@@ -399,8 +407,8 @@ fn make(args: MakeArgs) -> Result<()> {
 }
 
 fn info(args: InfoArgs) -> Result<()> {
-    let file = map_file(args.rel_file)?;
-    let (header, mut module_obj) = process_rel(&mut file.as_reader(), "")?;
+    let mut file = open_file(&args.rel_file, true)?;
+    let (header, mut module_obj) = process_rel(file.as_mut(), "")?;
 
     let mut state = AnalyzerState::default();
     state.detect_functions(&module_obj)?;
@@ -458,7 +466,7 @@ fn info(args: InfoArgs) -> Result<()> {
     if args.relocations {
         println!("\nRelocations:");
         println!("    [Source] section:address RelocType -> [Target] module:section:address");
-        print_relocations(&mut file.as_reader(), &header)?;
+        print_relocations(file.as_mut(), &header)?;
     }
     Ok(())
 }
@@ -467,11 +475,11 @@ fn info(args: InfoArgs) -> Result<()> {
 const fn align32(x: u32) -> u32 { (x + 31) & !31 }
 
 fn merge(args: MergeArgs) -> Result<()> {
-    log::info!("Loading {}", args.dol_file.display());
+    log::info!("Loading {}", args.dol_file);
     let mut obj = {
-        let file = map_file(&args.dol_file)?;
-        let name = args.dol_file.file_stem().map(|s| s.to_string_lossy()).unwrap_or_default();
-        process_dol(file.as_slice(), name.as_ref())?
+        let mut file = open_file(&args.dol_file, true)?;
+        let name = args.dol_file.file_stem().unwrap_or_default();
+        process_dol(file.map()?, name)?
     };
 
     log::info!("Performing signature analysis");
@@ -481,10 +489,10 @@ fn merge(args: MergeArgs) -> Result<()> {
     let mut processed = 0;
     let mut module_map = BTreeMap::<u32, ObjInfo>::new();
     for result in FileIterator::new(&args.rel_files)? {
-        let (path, entry) = result?;
-        log::info!("Loading {}", path.display());
-        let name = path.file_stem().map(|s| s.to_string_lossy()).unwrap_or_default();
-        let (_, obj) = process_rel(&mut entry.as_reader(), name.as_ref())?;
+        let (path, mut entry) = result?;
+        log::info!("Loading {}", path);
+        let name = path.file_stem().unwrap_or_default();
+        let (_, obj) = process_rel(&mut entry, name)?;
         match module_map.entry(obj.module_id) {
             btree_map::Entry::Vacant(e) => e.insert(obj),
             btree_map::Entry::Occupied(_) => bail!("Duplicate module ID {}", obj.module_id),
@@ -493,7 +501,7 @@ fn merge(args: MergeArgs) -> Result<()> {
     }
 
     log::info!("Merging {} REL(s)", processed);
-    let mut section_map: BTreeMap<u32, BTreeMap<u32, u32>> = BTreeMap::new();
+    let mut section_map: BTreeMap<u32, BTreeMap<ObjSectionIndex, u32>> = BTreeMap::new();
     let mut offset = align32(arena_lo + 0x2000);
     for module in module_map.values() {
         for (mod_section_index, mod_section) in module.sections.iter() {
@@ -512,7 +520,7 @@ fn merge(args: MergeArgs) -> Result<()> {
                 section_known: mod_section.section_known,
                 splits: mod_section.splits.clone(),
             });
-            section_map.nested_insert(module.module_id, mod_section.elf_index as u32, offset)?;
+            section_map.nested_insert(module.module_id, mod_section.elf_index, offset)?;
             for (_, mod_symbol) in module.symbols.for_section(mod_section_index) {
                 obj.symbols.add_direct(ObjSymbol {
                     name: mod_symbol.name.clone(),
@@ -536,7 +544,8 @@ fn merge(args: MergeArgs) -> Result<()> {
     log::info!("Applying REL relocations");
     for module in module_map.values() {
         for rel_reloc in &module.unresolved_relocations {
-            let source_addr = (section_map[&module.module_id][&(rel_reloc.section as u32)]
+            let source_addr = (section_map[&module.module_id]
+                [&(rel_reloc.section as ObjSectionIndex)]
                 + rel_reloc.address)
                 & !3;
             let target_addr = if rel_reloc.module_id == 0 {
@@ -600,7 +609,7 @@ fn merge(args: MergeArgs) -> Result<()> {
     tracker.apply(&mut obj, false)?;
 
     // Write ELF
-    log::info!("Writing {}", args.out_file.display());
+    log::info!("Writing {}", args.out_file);
     fs::write(&args.out_file, write_elf(&obj, false)?)?;
     Ok(())
 }

src/cmd/rso.rs

@@ -1,9 +1,26 @@
-use std::path::PathBuf;
+use std::io::{BufRead, Seek, Write};
 
-use anyhow::Result;
+use anyhow::{bail, ensure, Context, Result};
 use argp::FromArgs;
+use object::{
+    elf::{R_PPC_NONE, R_PPC_REL24},
+    Architecture, Endianness, Object, ObjectKind, ObjectSection, ObjectSymbol, SectionKind,
+    SymbolIndex, SymbolKind, SymbolSection,
+};
+use typed_path::{Utf8NativePath, Utf8NativePathBuf};
 
-use crate::util::{file::map_file, rso::process_rso};
+use crate::{
+    util::{
+        file::buf_writer,
+        path::native_path,
+        reader::{Endian, ToWriter},
+        rso::{
+            process_rso, symbol_hash, RsoHeader, RsoRelocation, RsoSectionHeader, RsoSymbol,
+            RSO_SECTION_NAMES,
+        },
+    },
+    vfs::open_file,
+};
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing RSO files.
@@ -17,30 +34,486 @@ pub struct Args {
 #[argp(subcommand)]
 enum SubCommand {
     Info(InfoArgs),
+    Make(MakeArgs),
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Views RSO file information.
 #[argp(subcommand, name = "info")]
 pub struct InfoArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// RSO file
-    rso_file: PathBuf,
+    rso_file: Utf8NativePathBuf,
+}
+
+#[derive(FromArgs, PartialEq, Eq, Debug)]
+/// Creates an RSO from an ELF.
+#[argp(subcommand, name = "make")]
+pub struct MakeArgs {
+    #[argp(positional, arg_name = "ELF File", from_str_fn(native_path))]
+    /// elf file
+    input: Utf8NativePathBuf,
+
+    #[argp(option, short = 'o', arg_name = "File", from_str_fn(native_path))]
+    /// output file path
+    output: Utf8NativePathBuf,
+
+    #[argp(option, short = 'm', arg_name = "Name")]
+    /// module name (or path). Default: input name
+    module_name: Option<String>,
+
+    #[argp(option, short = 'e', arg_name = "File", from_str_fn(native_path))]
+    /// file containing exported symbol names (newline separated)
+    export: Option<Utf8NativePathBuf>,
 }
 
 pub fn run(args: Args) -> Result<()> {
     match args.command {
         SubCommand::Info(c_args) => info(c_args),
+        SubCommand::Make(c_args) => make(c_args),
     }
 }
 
 fn info(args: InfoArgs) -> Result<()> {
     let rso = {
-        let file = map_file(args.rso_file)?;
-        let obj = process_rso(&mut file.as_reader())?;
-        #[allow(clippy::let_and_return)]
-        obj
+        let mut file = open_file(&args.rso_file, true)?;
+        process_rso(file.as_mut())?
     };
     println!("Read RSO module {}", rso.name);
     Ok(())
 }
+
+fn make(args: MakeArgs) -> Result<()> {
+    let mut file = open_file(&args.input, true)?;
+    let obj_file = object::read::File::parse(file.map()?)?;
+    match obj_file.architecture() {
+        Architecture::PowerPc => {}
+        arch => bail!("Unexpected architecture: {arch:?}"),
+    };
+    ensure!(obj_file.endianness() == Endianness::Big, "Expected big endian");
+
+    let module_name = match args.module_name {
+        Some(n) => n,
+        None => args.input.to_string(),
+    };
+
+    let symbols_to_export = match &args.export {
+        Some(export_file_path) => {
+            let export_file_reader = open_file(export_file_path, true)?;
+            export_file_reader.lines().map_while(Result::ok).collect()
+        }
+        None => vec![],
+    };
+
+    match obj_file.kind() {
+        ObjectKind::Executable => {
+            make_sel(obj_file, &args.output, &module_name, symbols_to_export)?
+        }
+        ObjectKind::Relocatable => {
+            make_rso(obj_file, &args.output, &module_name, symbols_to_export)?
+        }
+        kind => bail!("Unexpected ELF type: {kind:?}"),
+    }
+
+    Ok(())
+}
+
+fn make_sel(
+    _file: object::File,
+    _output: &Utf8NativePath,
+    _module_name: &str,
+    _symbols_to_export: Vec<String>,
+) -> Result<()> {
+    bail!("Creating SEL files is not supported yet.");
+}
+
+fn make_rso(
+    file: object::File,
+    output: &Utf8NativePath,
+    module_name: &str,
+    symbols_to_export: Vec<String>,
+) -> Result<()> {
+    let mut out = buf_writer(output)?;
+
+    let try_populate_symbol_index_and_offset =
+        |name: &str, index: &mut u8, offset: &mut u32| -> Result<()> {
+            let Some(sym) = file.symbol_by_name(name) else {
+                return Ok(());
+            };
+
+            let si = sym
+                .section_index()
+                .with_context(|| format!("Failed to find symbol `{}` section index", name))?;
+            let addr = sym.address();
+
+            *index = si.0 as u8;
+            *offset = addr as u32;
+
+            Ok(())
+        };
+
+    let pad_to_alignment =
+        |out: &mut std::io::BufWriter<std::fs::File>, alignment: u64| -> Result<()> {
+            if alignment == 0 {
+                return Ok(());
+            }
+
+            const ZERO_BUF: [u8; 32] = [0u8; 32];
+            let pos = out.stream_position()?;
+            let mut count = (!(alignment - 1) & ((alignment + pos) - 1)) - pos;
+
+            while count > 0 {
+                let slice_size = std::cmp::min(ZERO_BUF.len(), count as usize);
+                out.write_all(&ZERO_BUF[0..slice_size])?;
+                count -= slice_size as u64;
+            }
+
+            Ok(())
+        };
+
+    let mut header = RsoHeader::new();
+
+    try_populate_symbol_index_and_offset(
+        "_prolog",
+        &mut header.prolog_section,
+        &mut header.prolog_offset,
+    )?;
+    try_populate_symbol_index_and_offset(
+        "_epilog",
+        &mut header.epilog_section,
+        &mut header.epilog_offset,
+    )?;
+    try_populate_symbol_index_and_offset(
+        "_unresolved",
+        &mut header.unresolved_section,
+        &mut header.unresolved_offset,
+    )?;
+
+    header.to_writer(&mut out, Endian::Big)?;
+    header.section_info_offset = out.stream_position()? as u32;
+    {
+        // Write Sections Info Table (Blank)
+        let blank_section = RsoSectionHeader::default();
+        // Include ELF null section
+        for _ in 0..file.sections().count() + 1 {
+            header.num_sections += 1;
+            blank_section.to_writer(&mut out, Endian::Big)?;
+        }
+    }
+
+    let mut rso_sections: Vec<RsoSectionHeader> =
+        vec![RsoSectionHeader::default() /* ELF null section */];
+    for section in file.sections() {
+        let is_valid_section =
+            section.name().is_ok_and(|n| RSO_SECTION_NAMES.iter().any(|&s| s == n));
+        let section_size = section.size();
+
+        if !is_valid_section || section_size == 0 {
+            rso_sections.push(RsoSectionHeader::default());
+            continue;
+        }
+
+        if section.kind() == SectionKind::UninitializedData {
+            header.bss_size += section_size as u32;
+            rso_sections.push(RsoSectionHeader { offset_and_flags: 0, size: section_size as u32 });
+            continue;
+        }
+
+        pad_to_alignment(&mut out, section.align())?;
+        let section_offset_in_file = out.stream_position()?;
+        let section_data = section.data()?;
+        out.write_all(section_data)?;
+        rso_sections.push(RsoSectionHeader {
+            offset_and_flags: section_offset_in_file as u32,
+            size: section_size as u32,
+        });
+    }
+
+    pad_to_alignment(&mut out, 4)?;
+    header.name_offset = out.stream_position()? as u32;
+
+    // Rewind and write the correct section info table
+    out.seek(std::io::SeekFrom::Start(header.section_info_offset as u64))?;
+    for section in &rso_sections {
+        section.to_writer(&mut out, Endian::Big)?;
+    }
+
+    // Write the module name
+    out.seek(std::io::SeekFrom::Start(header.name_offset as u64))?;
+
+    let module_name = module_name.as_bytes();
+    out.write_all(module_name)?;
+    header.name_size = module_name.len() as u32;
+
+    // Accumulate exported and imported symbol
+    let mut import_symbol_table: Vec<RsoSymbol> = vec![];
+    let mut export_symbol_table: Vec<RsoSymbol> = vec![];
+    for symbol in file.symbols() {
+        let sym_binding = match symbol.flags() {
+            object::SymbolFlags::Elf { st_info, st_other: _ } => st_info >> 4,
+            flag => bail!("Unknown symbol flag found `{:?}`", flag),
+        };
+
+        let symbol_name = match symbol.name() {
+            Ok(n) => {
+                if n.is_empty() {
+                    continue;
+                }
+
+                n
+            }
+            Err(_) => continue,
+        };
+
+        // In the [`RsoSymbol::name_offset`] field we would store the symbol index temp
+        match symbol.section_index() {
+            Some(section_index)
+                if sym_binding != object::elf::STB_LOCAL && section_index.0 != 0 =>
+            {
+                // Symbol to export
+                if !symbols_to_export.iter().any(|s| s == symbol_name) {
+                    continue;
+                }
+
+                let hash = symbol_hash(symbol_name);
+                export_symbol_table.push(RsoSymbol {
+                    name_offset: symbol.index().0 as u32,
+                    offset: symbol.address() as u32,
+                    section_index: section_index.0 as u32,
+                    hash: Some(hash),
+                });
+            }
+            None => {
+                if matches!(symbol.kind(), SymbolKind::File) {
+                    continue;
+                }
+
+                if symbol.section() == SymbolSection::Absolute {
+                    if !symbols_to_export.iter().any(|s| s == symbol_name) {
+                        continue;
+                    }
+
+                    // Special Symbols
+                    let hash = symbol_hash(symbol_name);
+                    export_symbol_table.push(RsoSymbol {
+                        name_offset: symbol.index().0 as u32,
+                        offset: symbol.address() as u32,
+                        section_index: 0xFFF1_u32,
+                        hash: Some(hash),
+                    });
+                    continue;
+                }
+
+                // Symbol to import
+                import_symbol_table.push(RsoSymbol {
+                    name_offset: symbol.index().0 as u32,
+                    offset: symbol.address() as u32,
+                    section_index: 0, // Relocation offset
+                    hash: None,
+                });
+            }
+            _ => continue,
+        }
+    }
+
+    // Accumulate relocations
+    let mut imported_relocations: Vec<RsoRelocation> = vec![];
+    let mut exported_relocations: Vec<RsoRelocation> = vec![];
+
+    for section in file.sections() {
+        let is_valid_section =
+            section.name().is_ok_and(|n| RSO_SECTION_NAMES.iter().any(|&s| s == n));
+        if !is_valid_section {
+            continue;
+        }
+
+        let relocation_section_idx = section.index().0 as u32;
+        let relocation_section_offset =
+            rso_sections[relocation_section_idx as usize].offset_and_flags;
+
+        for (reloc_addr, reloc) in section.relocations() {
+            let reloc_target_symbol_idx = match reloc.target() {
+                object::RelocationTarget::Symbol(t) => t,
+                _ => continue,
+            };
+
+            let Ok(reloc_target_symbol) = file.symbol_by_index(reloc_target_symbol_idx) else {
+                bail!(
+                    "Failed to find relocation `{:08X}` symbol ({})",
+                    reloc_addr,
+                    reloc_target_symbol_idx.0
+                );
+            };
+
+            let reloc_type = match reloc.flags() {
+                object::RelocationFlags::Elf { r_type } => r_type,
+                _ => continue,
+            };
+
+            if reloc_type == R_PPC_NONE {
+                continue;
+            }
+
+            match reloc_target_symbol.section_index() {
+                None => {
+                    // Imported symbol relocation
+                    // Get the symbol index inside the import symbol table
+                    let symbol_table_idx = match import_symbol_table
+                        .iter()
+                        .position(|s| s.name_offset == reloc_target_symbol_idx.0 as u32)
+                    {
+                        Some(idx) => idx,
+                        // We should always find the symbol. If not, it means a logic error in the symbol accumulator loop
+                        // panic?
+                        None => {
+                            bail!("Failed to find imported symbol in the accumulated symbol table.")
+                        }
+                    };
+
+                    let id_and_type = ((symbol_table_idx as u32) << 8) | (reloc_type & 0xFF);
+                    imported_relocations.push(RsoRelocation {
+                        // Convert the relocation offset from being section relative to file relative
+                        offset: relocation_section_offset + reloc_addr as u32,
+                        id_and_type,
+                        target_offset: 0,
+                    });
+                }
+                Some(reloc_symbol_section_idx) => {
+                    // Exported symbol relocation
+                    let id_and_type =
+                        ((reloc_symbol_section_idx.0 as u32) << 8) | (reloc_type & 0xFF);
+                    exported_relocations.push(RsoRelocation {
+                        // Convert the relocation offset from being section relative to file relative
+                        offset: relocation_section_offset + reloc_addr as u32,
+                        id_and_type,
+                        target_offset: reloc.addend() as u32 + reloc_target_symbol.address() as u32,
+                    });
+                }
+            }
+
+            // Apply relocation with the `_unresolved` as the symbol, if the module export the function
+            if reloc_type == R_PPC_REL24
+                && header.unresolved_offset != 0
+                && header.unresolved_section == relocation_section_idx as u8
+            {
+                let target_section = file
+                    .section_by_index(object::SectionIndex(relocation_section_idx as usize))
+                    .unwrap();
+                let target_section_data = target_section.data().unwrap();
+
+                // Copy instruction
+                let mut intruction_buff = [0u8; 4];
+                intruction_buff.copy_from_slice(
+                    &target_section_data[(reloc_addr as usize)..(reloc_addr + 4) as usize],
+                );
+                let target_instruction = u32::from_be_bytes(intruction_buff);
+
+                let off_diff = header.unresolved_offset as i64 - reloc_addr as i64;
+                let replacement_instruction =
+                    (off_diff as u32 & 0x3fffffcu32) | (target_instruction & 0xfc000003u32);
+                let intruction_buff = replacement_instruction.to_be_bytes();
+
+                let relocation_file_offset = relocation_section_offset as u64 + reloc_addr;
+                let current_stream_pos = out.stream_position()?;
+                out.seek(std::io::SeekFrom::Start(relocation_file_offset))?;
+                out.write_all(&intruction_buff)?;
+                out.seek(std::io::SeekFrom::Start(current_stream_pos))?;
+            }
+        }
+    }
+
+    // Sort imported relocation, by symbol index
+    imported_relocations.sort_by(|lhs, rhs| {
+        let lhs_symbol_idx = lhs.id();
+        let rhs_symbol_idx = rhs.id();
+        rhs_symbol_idx.cmp(&lhs_symbol_idx)
+    });
+
+    // Sort Export Symbol by Hash
+    export_symbol_table.sort_by(|lhs, rhs| rhs.hash.unwrap().cmp(&lhs.hash.unwrap()));
+
+    {
+        // Write Export Symbol Table
+        pad_to_alignment(&mut out, 4)?;
+        header.export_table_offset = out.stream_position()? as u32;
+        header.export_table_size = (export_symbol_table.len() * 16) as u32;
+
+        let mut export_symbol_name_table: Vec<u8> = vec![];
+        for export_symbol in &mut export_symbol_table {
+            let export_elf_symbol =
+                file.symbol_by_index(SymbolIndex(export_symbol.name_offset as usize)).unwrap();
+            let export_elf_symbol_name = export_elf_symbol.name().unwrap();
+            export_symbol.name_offset = export_symbol_name_table.len() as u32;
+            export_symbol.to_writer(&mut out, Endian::Big)?;
+
+            export_symbol_name_table.extend_from_slice(export_elf_symbol_name.as_bytes());
+            export_symbol_name_table.push(0u8); // '\0'
+        }
+
+        // Write Export Symbol Name Table
+        pad_to_alignment(&mut out, 4)?;
+        header.export_table_name_offset = out.stream_position()? as u32;
+        out.write_all(&export_symbol_name_table)?;
+    }
+
+    {
+        // Write Imported Symbol Relocation
+        pad_to_alignment(&mut out, 4)?;
+        header.external_rel_offset = out.stream_position()? as u32;
+        header.external_rel_size = (imported_relocations.len() * 12) as u32;
+
+        for reloc in &imported_relocations {
+            reloc.to_writer(&mut out, Endian::Big)?;
+        }
+    }
+
+    {
+        pad_to_alignment(&mut out, 4)?;
+        header.import_table_offset = out.stream_position()? as u32;
+        header.import_table_size = (import_symbol_table.len() * 12) as u32;
+
+        let mut import_symbol_name_table: Vec<u8> = vec![];
+
+        for (import_symbol_idx, import_symbol) in import_symbol_table.iter_mut().enumerate() {
+            let import_elf_symbol_idx = import_symbol.name_offset as usize;
+            let import_elf_symbol =
+                file.symbol_by_index(SymbolIndex(import_elf_symbol_idx)).unwrap();
+            let import_elf_symbol_name = import_elf_symbol.name().unwrap();
+            import_symbol.name_offset = import_symbol_name_table.len() as u32;
+
+            // Gather the index of the first relocation that utilize this symbol
+            let first_relocation_offset = imported_relocations
+                .iter()
+                .position(|r| r.id() == import_symbol_idx as u32)
+                .map(|idx| idx * 12)
+                .unwrap_or(usize::MAX) as u32;
+            import_symbol.section_index = first_relocation_offset;
+            import_symbol.to_writer(&mut out, Endian::Big)?;
+
+            import_symbol_name_table.extend_from_slice(import_elf_symbol_name.as_bytes());
+            import_symbol_name_table.push(0u8); // '\0'
+        }
+
+        // Write Export Symbol Name Table
+        pad_to_alignment(&mut out, 4)?;
+        header.import_table_name_offset = out.stream_position()? as u32;
+        out.write_all(&import_symbol_name_table)?;
+    }
+
+    {
+        // Write Internal Relocation Table
+        pad_to_alignment(&mut out, 4)?;
+        header.internal_rel_offset = out.stream_position()? as u32;
+        header.internal_rel_size = (exported_relocations.len() * 12) as u32;
+
+        for reloc in &exported_relocations {
+            reloc.to_writer(&mut out, Endian::Big)?;
+        }
+    }
+
+    pad_to_alignment(&mut out, 32)?;
+    out.seek(std::io::SeekFrom::Start(0))?;
+    header.to_writer(&mut out, Endian::Big)?;
+
+    Ok(())
+}

src/cmd/shasum.rs

@@ -1,16 +1,21 @@
 use std::{
     fs::File,
-    io::{stdout, BufRead, BufReader, Read, Write},
-    path::{Path, PathBuf},
+    io::{stdout, BufRead, Read, Write},
 };
 
 use anyhow::{anyhow, bail, Context, Result};
 use argp::FromArgs;
 use owo_colors::{OwoColorize, Stream};
-use path_slash::PathExt;
 use sha1::{Digest, Sha1};
+use typed_path::{Utf8NativePath, Utf8NativePathBuf};
 
-use crate::util::file::{buf_writer, open_file, process_rsp, touch};
+use crate::{
+    util::{
+        file::{buf_writer, process_rsp, touch},
+        path::native_path,
+    },
+    vfs::open_file,
+};
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Print or check SHA1 (160-bit) checksums.
@@ -19,13 +24,13 @@ pub struct Args {
     #[argp(switch, short = 'c')]
     /// check SHA sums against given list
     check: bool,
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// path to input file(s)
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// (check) touch output file on successful check
     /// (hash) write hash(es) to output file
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
     #[argp(switch, short = 'q')]
     /// only print failures and a summary
     quiet: bool,
@@ -36,25 +41,25 @@ const DEFAULT_BUF_SIZE: usize = 8192;
 pub fn run(args: Args) -> Result<()> {
     if args.check {
         for path in process_rsp(&args.files)? {
-            let file = open_file(&path)?;
-            check(&args, &mut BufReader::new(file))?;
+            let mut file = open_file(&path, false)?;
+            check(&args, file.as_mut())?;
         }
         if let Some(out_path) = &args.output {
             touch(out_path)
-                .with_context(|| format!("Failed to touch output file '{}'", out_path.display()))?;
+                .with_context(|| format!("Failed to touch output file '{}'", out_path))?;
         }
     } else {
-        let mut w: Box<dyn Write> =
-            if let Some(out_path) = &args.output {
-                Box::new(buf_writer(out_path).with_context(|| {
-                    format!("Failed to open output file '{}'", out_path.display())
-                })?)
+        let mut w: Box<dyn Write> = if let Some(out_path) = &args.output {
+            Box::new(
+                buf_writer(out_path)
+                    .with_context(|| format!("Failed to open output file '{}'", out_path))?,
+            )
         } else {
             Box::new(stdout())
         };
         for path in process_rsp(&args.files)? {
-            let mut file = open_file(&path)?;
-            hash(w.as_mut(), &mut file, &path)?
+            let mut file = open_file(&path, false)?;
+            hash(w.as_mut(), file.as_mut(), &path)?
         }
     }
     Ok(())
@@ -111,7 +116,7 @@ where R: BufRead + ?Sized {
     Ok(())
 }
 
-fn hash<R, W>(w: &mut W, reader: &mut R, path: &Path) -> Result<()>
+fn hash<R, W>(w: &mut W, reader: &mut R, path: &Utf8NativePath) -> Result<()>
 where
     R: Read + ?Sized,
     W: Write + ?Sized,
@@ -120,7 +125,7 @@ where
     let mut hash_buf = [0u8; 40];
     let hash_str = base16ct::lower::encode_str(&hash, &mut hash_buf)
         .map_err(|e| anyhow!("Failed to encode hash: {e}"))?;
-    writeln!(w, "{}  {}", hash_str, path.to_slash_lossy())?;
+    writeln!(w, "{}  {}", hash_str, path.with_unix_encoding())?;
     Ok(())
 }
 

src/cmd/u8_arc.rs

@@ -1,13 +1,9 @@
-use std::{borrow::Cow, fs, fs::DirBuilder, path::PathBuf};
-
-use anyhow::{anyhow, Context, Result};
+use anyhow::Result;
 use argp::FromArgs;
-use itertools::Itertools;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::{decompress_if_needed, map_file},
-    u8_arc::{U8Node, U8View},
-};
+use super::vfs;
+use crate::util::path::native_path;
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing U8 (arc) files.
@@ -28,23 +24,29 @@ enum SubCommand {
 /// Views U8 (arc) file information.
 #[argp(subcommand, name = "list")]
 pub struct ListArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// U8 (arc) file
-    file: PathBuf,
+    file: Utf8NativePathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    short: bool,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Extracts U8 (arc) file contents.
 #[argp(subcommand, name = "extract")]
 pub struct ExtractArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// U8 (arc) file
-    file: PathBuf,
-    #[argp(option, short = 'o')]
+    file: Utf8NativePathBuf,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// output directory
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    no_decompress: bool,
     #[argp(switch, short = 'q')]
-    /// quiet output
+    /// Quiet output. Don't print anything except errors.
     quiet: bool,
 }
 
@@ -56,66 +58,16 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn list(args: ListArgs) -> Result<()> {
-    let file = map_file(&args.file)?;
-    let view = U8View::new(file.as_slice())
-        .map_err(|e| anyhow!("Failed to open U8 file '{}': {}", args.file.display(), e))?;
-    visit_files(&view, |_, node, path| {
-        println!("{}: {} bytes, offset {:#X}", path, node.length(), node.offset());
-        Ok(())
-    })
+    let path = Utf8NativePathBuf::from(format!("{}:", args.file));
+    vfs::ls(vfs::LsArgs { path, short: args.short, recursive: true })
 }
 
 fn extract(args: ExtractArgs) -> Result<()> {
-    let file = map_file(&args.file)?;
-    let view = U8View::new(file.as_slice())
-        .map_err(|e| anyhow!("Failed to open U8 file '{}': {}", args.file.display(), e))?;
-    visit_files(&view, |_, node, path| {
-        let offset = node.offset();
-        let size = node.length();
-        let file_data = decompress_if_needed(
-            &file.as_slice()[offset as usize..offset as usize + size as usize],
-        )?;
-        let output_path = args
-            .output
-            .as_ref()
-            .map(|p| p.join(&path))
-            .unwrap_or_else(|| PathBuf::from(path.clone()));
-        if !args.quiet {
-            println!("Extracting {} to {} ({} bytes)", path, output_path.display(), size);
-        }
-        if let Some(parent) = output_path.parent() {
-            DirBuilder::new().recursive(true).create(parent)?;
-        }
-        fs::write(&output_path, file_data)
-            .with_context(|| format!("Failed to write file '{}'", output_path.display()))?;
-        Ok(())
+    let path = Utf8NativePathBuf::from(format!("{}:", args.file));
+    let output = args.output.unwrap_or_else(|| Utf8NativePathBuf::from("."));
+    vfs::cp(vfs::CpArgs {
+        paths: vec![path, output],
+        no_decompress: args.no_decompress,
+        quiet: args.quiet,
     })
 }
-
-fn visit_files(
-    view: &U8View,
-    mut visitor: impl FnMut(usize, &U8Node, String) -> Result<()>,
-) -> Result<()> {
-    let mut path_segments = Vec::<(Cow<str>, usize)>::new();
-    for (idx, node, name) in view.iter() {
-        // Remove ended path segments
-        let mut new_size = 0;
-        for (_, end) in path_segments.iter() {
-            if *end == idx {
-                break;
-            }
-            new_size += 1;
-        }
-        path_segments.truncate(new_size);
-
-        // Add the new path segment
-        let end = if node.is_dir() { node.length() as usize } else { idx + 1 };
-        path_segments.push((name.map_err(|e| anyhow!("{}", e))?, end));
-
-        let path = path_segments.iter().map(|(name, _)| name.as_ref()).join("/");
-        if !node.is_dir() {
-            visitor(idx, node, path)?;
-        }
-    }
-    Ok(())
-}

src/cmd/vfs.rs

@@ -0,0 +1,286 @@
+use std::{fs, fs::File, io::Write};
+
+use anyhow::{anyhow, bail, Context};
+use argp::FromArgs;
+use size::Size;
+use typed_path::{Utf8NativePath, Utf8NativePathBuf, Utf8UnixPath};
+
+use crate::{
+    util::{file::buf_copy, path::native_path},
+    vfs::{
+        decompress_file, detect, open_path, FileFormat, OpenResult, Vfs, VfsFile, VfsFileType,
+        VfsMetadata,
+    },
+};
+
+#[derive(FromArgs, PartialEq, Debug)]
+/// Commands for interacting with discs and containers.
+#[argp(subcommand, name = "vfs")]
+pub struct Args {
+    #[argp(subcommand)]
+    command: SubCommand,
+}
+
+#[derive(FromArgs, PartialEq, Debug)]
+#[argp(subcommand)]
+enum SubCommand {
+    Ls(LsArgs),
+    Cp(CpArgs),
+}
+
+#[derive(FromArgs, PartialEq, Eq, Debug)]
+/// List files in a directory or container.
+#[argp(subcommand, name = "ls")]
+pub struct LsArgs {
+    #[argp(positional, from_str_fn(native_path))]
+    /// Directory or container path.
+    pub path: Utf8NativePathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    pub short: bool,
+    #[argp(switch, short = 'r')]
+    /// Recursively list files in directories.
+    pub recursive: bool,
+}
+
+#[derive(FromArgs, PartialEq, Eq, Debug)]
+/// Copy files from a container.
+#[argp(subcommand, name = "cp")]
+pub struct CpArgs {
+    #[argp(positional, from_str_fn(native_path))]
+    /// Source path(s) and destination path.
+    pub paths: Vec<Utf8NativePathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    pub no_decompress: bool,
+    #[argp(switch, short = 'q')]
+    /// Quiet output. Don't print anything except errors.
+    pub quiet: bool,
+}
+
+pub fn run(args: Args) -> anyhow::Result<()> {
+    match args.command {
+        SubCommand::Ls(args) => ls(args),
+        SubCommand::Cp(args) => cp(args),
+    }
+}
+
+const SEPARATOR: &str = " | ";
+type Columns<const N: usize> = [String; N];
+
+fn column_widths<const N: usize>(entries: &[Columns<N>]) -> [usize; N] {
+    let mut widths = [0usize; N];
+    for text in entries {
+        for (i, column) in text.iter().enumerate() {
+            widths[i] = widths[i].max(column.len());
+        }
+    }
+    widths
+}
+
+fn file_info(
+    filename: &str,
+    file: &mut dyn VfsFile,
+    metadata: &VfsMetadata,
+) -> anyhow::Result<Columns<5>> {
+    let format =
+        detect(file).with_context(|| format!("Failed to detect file format for {}", filename))?;
+    let mut info: Columns<5> = [
+        Size::from_bytes(metadata.len).to_string(),
+        filename.to_string(),
+        format.to_string(),
+        String::new(),
+        String::new(),
+    ];
+    if let FileFormat::Compressed(kind) = format {
+        let mut decompressed = decompress_file(file, kind)?;
+        let metadata = decompressed
+            .metadata()
+            .with_context(|| format!("Failed to fetch metadata for {}", filename))?;
+        let format = detect(decompressed.as_mut())
+            .with_context(|| format!("Failed to detect file format for {}", filename))?;
+        info[3] = format!("Decompressed: {}", Size::from_bytes(metadata.len));
+        info[4] = format.to_string();
+    }
+    Ok(info)
+}
+
+pub fn ls(args: LsArgs) -> anyhow::Result<()> {
+    let mut files = Vec::new();
+    match open_path(&args.path, false)? {
+        OpenResult::File(mut file, path) => {
+            let filename = path.file_name().ok_or_else(|| anyhow!("Path has no filename"))?;
+            if args.short {
+                println!("{}", filename);
+            } else {
+                let metadata = file
+                    .metadata()
+                    .with_context(|| format!("Failed to fetch metadata for {}", path))?;
+                files.push(file_info(filename, file.as_mut(), &metadata)?);
+            }
+        }
+        OpenResult::Directory(mut fs, path) => {
+            ls_directory(fs.as_mut(), &path, Utf8UnixPath::new(""), &args, &mut files)?;
+        }
+    }
+    if !args.short {
+        let widths = column_widths(&files);
+        for entry in files {
+            let mut written = 0;
+            for (i, column) in entry.iter().enumerate() {
+                if widths[i] > 0 {
+                    if written > 0 {
+                        print!("{}", SEPARATOR);
+                    }
+                    written += 1;
+                    print!("{:width$}", column, width = widths[i]);
+                }
+            }
+            println!();
+        }
+    }
+    Ok(())
+}
+
+fn ls_directory(
+    fs: &mut dyn Vfs,
+    path: &Utf8UnixPath,
+    base_filename: &Utf8UnixPath,
+    args: &LsArgs,
+    files: &mut Vec<Columns<5>>,
+) -> anyhow::Result<()> {
+    let entries = fs.read_dir(path)?;
+    files.reserve(entries.len());
+    for filename in entries {
+        let entry_path = path.join(&filename);
+        let display_path = base_filename.join(&filename);
+        let metadata = fs
+            .metadata(&entry_path)
+            .with_context(|| format!("Failed to fetch metadata for {}", entry_path))?;
+        match metadata.file_type {
+            VfsFileType::File => {
+                let mut file = fs
+                    .open(&entry_path)
+                    .with_context(|| format!("Failed to open file {}", entry_path))?;
+                if args.short {
+                    println!("{}", display_path);
+                } else {
+                    files.push(file_info(display_path.as_str(), file.as_mut(), &metadata)?);
+                }
+            }
+            VfsFileType::Directory => {
+                if args.short {
+                    println!("{}/", display_path);
+                } else {
+                    files.push([
+                        "        ".to_string(),
+                        format!("{}/", display_path),
+                        "Directory".to_string(),
+                        String::new(),
+                        String::new(),
+                    ]);
+                }
+                if args.recursive {
+                    ls_directory(fs, &entry_path, &display_path, args, files)?;
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn cp(mut args: CpArgs) -> anyhow::Result<()> {
+    if args.paths.len() < 2 {
+        bail!("Both source and destination paths must be provided");
+    }
+    let dest = args.paths.pop().unwrap();
+    let dest_is_dir = args.paths.len() > 1 || fs::metadata(&dest).ok().is_some_and(|m| m.is_dir());
+    let auto_decompress = !args.no_decompress;
+    for path in args.paths {
+        match open_path(&path, auto_decompress)? {
+            OpenResult::File(file, path) => {
+                let dest = if dest_is_dir {
+                    fs::create_dir_all(&dest)
+                        .with_context(|| format!("Failed to create directory {}", dest))?;
+                    let filename =
+                        path.file_name().ok_or_else(|| anyhow!("Path has no filename"))?;
+                    dest.join(filename)
+                } else {
+                    dest.clone()
+                };
+                cp_file(file, &path, &dest, auto_decompress, args.quiet)?;
+            }
+            OpenResult::Directory(mut fs, path) => {
+                cp_recursive(fs.as_mut(), &path, &dest, auto_decompress, args.quiet)?;
+            }
+        }
+    }
+    Ok(())
+}
+
+fn cp_file(
+    mut file: Box<dyn VfsFile>,
+    path: &Utf8UnixPath,
+    dest: &Utf8NativePath,
+    auto_decompress: bool,
+    quiet: bool,
+) -> anyhow::Result<()> {
+    let mut compression = None;
+    if let FileFormat::Compressed(kind) = detect(file.as_mut())? {
+        if auto_decompress {
+            file = decompress_file(file.as_mut(), kind)
+                .with_context(|| format!("Failed to decompress file {}", dest))?;
+            compression = Some(kind);
+        }
+    }
+    let metadata =
+        file.metadata().with_context(|| format!("Failed to fetch metadata for {}", dest))?;
+    if !quiet {
+        if let Some(kind) = compression {
+            println!(
+                "{} -> {} ({}) [Decompressed {}]",
+                path,
+                dest,
+                Size::from_bytes(metadata.len),
+                kind
+            );
+        } else {
+            println!("{} -> {} ({})", path, dest, Size::from_bytes(metadata.len));
+        }
+    }
+    let mut dest_file =
+        File::create(dest).with_context(|| format!("Failed to create file {}", dest))?;
+    buf_copy(file.as_mut(), &mut dest_file)
+        .with_context(|| format!("Failed to copy file {}", dest))?;
+    dest_file.flush().with_context(|| format!("Failed to flush file {}", dest))?;
+    Ok(())
+}
+
+fn cp_recursive(
+    fs: &mut dyn Vfs,
+    path: &Utf8UnixPath,
+    dest: &Utf8NativePath,
+    auto_decompress: bool,
+    quiet: bool,
+) -> anyhow::Result<()> {
+    fs::create_dir_all(dest).with_context(|| format!("Failed to create directory {}", dest))?;
+    let entries = fs.read_dir(path)?;
+    for filename in entries {
+        let entry_path = path.join(&filename);
+        let metadata = fs
+            .metadata(&entry_path)
+            .with_context(|| format!("Failed to fetch metadata for {}", entry_path))?;
+        match metadata.file_type {
+            VfsFileType::File => {
+                let file = fs
+                    .open(&entry_path)
+                    .with_context(|| format!("Failed to open file {}", entry_path))?;
+                cp_file(file, &entry_path, &dest.join(filename), auto_decompress, quiet)?;
+            }
+            VfsFileType::Directory => {
+                cp_recursive(fs, &entry_path, &dest.join(filename), auto_decompress, quiet)?;
+            }
+        }
+    }
+    Ok(())
+}

src/cmd/yay0.rs

@@ -1,12 +1,17 @@
-use std::{fs, path::PathBuf};
+use std::fs;
 
 use anyhow::{Context, Result};
 use argp::FromArgs;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::{map_file_basic, process_rsp},
+use crate::{
+    util::{
+        file::process_rsp,
         ncompress::{compress_yay0, decompress_yay0},
+        path::native_path,
         IntoCow, ToCow,
+    },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -28,26 +33,26 @@ enum SubCommand {
 /// Compresses files using YAY0.
 #[argp(subcommand, name = "compress")]
 pub struct CompressArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// Files to compress
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file (or directory, if multiple files are specified).
     /// If not specified, compresses in-place.
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Decompresses YAY0-compressed files.
 #[argp(subcommand, name = "decompress")]
 pub struct DecompressArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// YAY0-compressed files
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file (or directory, if multiple files are specified).
     /// If not specified, decompresses in-place.
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 pub fn run(args: Args) -> Result<()> {
@@ -62,8 +67,8 @@ fn compress(args: CompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let file = map_file_basic(&path)?;
-            compress_yay0(file.as_slice())
+            let mut file = open_file(&path, false)?;
+            compress_yay0(file.map()?)
         };
         let out_path = if let Some(output) = &args.output {
             if single_file {
@@ -75,7 +80,7 @@ fn compress(args: CompressArgs) -> Result<()> {
             path.as_path().to_cow()
         };
         fs::write(out_path.as_ref(), data)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     Ok(())
 }
@@ -85,9 +90,9 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let file = map_file_basic(&path)?;
-            decompress_yay0(file.as_slice())
-                .with_context(|| format!("Failed to decompress '{}' using Yay0", path.display()))?
+            let mut file = open_file(&path, true)?;
+            decompress_yay0(file.map()?)
+                .with_context(|| format!("Failed to decompress '{}' using Yay0", path))?
         };
         let out_path = if let Some(output) = &args.output {
             if single_file {
@@ -99,7 +104,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
             path.as_path().to_cow()
         };
         fs::write(out_path.as_ref(), data)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     Ok(())
 }

src/cmd/yaz0.rs

@@ -1,12 +1,17 @@
-use std::{fs, path::PathBuf};
+use std::fs;
 
 use anyhow::{Context, Result};
 use argp::FromArgs;
+use typed_path::Utf8NativePathBuf;
 
-use crate::util::{
-    file::{map_file_basic, process_rsp},
+use crate::{
+    util::{
+        file::process_rsp,
         ncompress::{compress_yaz0, decompress_yaz0},
+        path::native_path,
         IntoCow, ToCow,
+    },
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -28,26 +33,26 @@ enum SubCommand {
 /// Compresses files using YAZ0.
 #[argp(subcommand, name = "compress")]
 pub struct CompressArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// Files to compress
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file (or directory, if multiple files are specified).
     /// If not specified, compresses in-place.
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Decompresses YAZ0-compressed files.
 #[argp(subcommand, name = "decompress")]
 pub struct DecompressArgs {
-    #[argp(positional)]
+    #[argp(positional, from_str_fn(native_path))]
     /// YAZ0-compressed files
-    files: Vec<PathBuf>,
-    #[argp(option, short = 'o')]
+    files: Vec<Utf8NativePathBuf>,
+    #[argp(option, short = 'o', from_str_fn(native_path))]
     /// Output file (or directory, if multiple files are specified).
     /// If not specified, decompresses in-place.
-    output: Option<PathBuf>,
+    output: Option<Utf8NativePathBuf>,
 }
 
 pub fn run(args: Args) -> Result<()> {
@@ -62,8 +67,8 @@ fn compress(args: CompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let file = map_file_basic(&path)?;
-            compress_yaz0(file.as_slice())
+            let mut file = open_file(&path, false)?;
+            compress_yaz0(file.map()?)
         };
         let out_path = if let Some(output) = &args.output {
             if single_file {
@@ -75,7 +80,7 @@ fn compress(args: CompressArgs) -> Result<()> {
             path.as_path().to_cow()
         };
         fs::write(out_path.as_ref(), data)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     Ok(())
 }
@@ -85,9 +90,9 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let file = map_file_basic(&path)?;
-            decompress_yaz0(file.as_slice())
-                .with_context(|| format!("Failed to decompress '{}' using Yaz0", path.display()))?
+            let mut file = open_file(&path, false)?;
+            decompress_yaz0(file.map()?)
+                .with_context(|| format!("Failed to decompress '{}' using Yaz0", path))?
         };
         let out_path = if let Some(output) = &args.output {
             if single_file {
@@ -99,7 +104,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
             path.as_path().to_cow()
         };
         fs::write(out_path.as_ref(), data)
-            .with_context(|| format!("Failed to write '{}'", out_path.display()))?;
+            .with_context(|| format!("Failed to write '{}'", out_path))?;
     }
     Ok(())
 }

src/main.rs

@@ -1,3 +1,4 @@
+#![deny(unused_crate_dependencies)]
 use std::{env, ffi::OsStr, fmt::Display, path::PathBuf, process::exit, str::FromStr};
 
 use anyhow::Error;
@@ -12,6 +13,13 @@ pub mod argp_version;
 pub mod cmd;
 pub mod obj;
 pub mod util;
+pub mod vfs;
+
+// musl's allocator is very slow, so use mimalloc when targeting musl.
+// Otherwise, use the system allocator to avoid extra code size.
+#[cfg(target_env = "musl")]
+#[global_allocator]
+static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]
 enum LogLevel {
@@ -89,13 +97,13 @@ enum SubCommand {
     Elf(cmd::elf::Args),
     Elf2Dol(cmd::elf2dol::Args),
     Map(cmd::map::Args),
-    MetroidBuildInfo(cmd::metroidbuildinfo::Args),
     Nlzss(cmd::nlzss::Args),
     Rarc(cmd::rarc::Args),
     Rel(cmd::rel::Args),
     Rso(cmd::rso::Args),
     Shasum(cmd::shasum::Args),
     U8(cmd::u8_arc::Args),
+    Vfs(cmd::vfs::Args),
     Yay0(cmd::yay0::Args),
     Yaz0(cmd::yaz0::Args),
 }
@@ -164,13 +172,13 @@ fn main() {
         SubCommand::Elf(c_args) => cmd::elf::run(c_args),
         SubCommand::Elf2Dol(c_args) => cmd::elf2dol::run(c_args),
         SubCommand::Map(c_args) => cmd::map::run(c_args),
-        SubCommand::MetroidBuildInfo(c_args) => cmd::metroidbuildinfo::run(c_args),
         SubCommand::Nlzss(c_args) => cmd::nlzss::run(c_args),
         SubCommand::Rarc(c_args) => cmd::rarc::run(c_args),
         SubCommand::Rel(c_args) => cmd::rel::run(c_args),
         SubCommand::Rso(c_args) => cmd::rso::run(c_args),
         SubCommand::Shasum(c_args) => cmd::shasum::run(c_args),
         SubCommand::U8(c_args) => cmd::u8_arc::run(c_args),
+        SubCommand::Vfs(c_args) => cmd::vfs::run(c_args),
         SubCommand::Yay0(c_args) => cmd::yay0::run(c_args),
         SubCommand::Yaz0(c_args) => cmd::yaz0::run(c_args),
     });

src/obj/mod.rs

@@ -13,7 +13,9 @@ use std::{
 use anyhow::{anyhow, bail, ensure, Result};
 use objdiff_core::obj::split_meta::SplitMeta;
 pub use relocations::{ObjReloc, ObjRelocKind, ObjRelocations};
-pub use sections::{ObjSection, ObjSectionKind, ObjSections};
+pub use sections::{
+    section_kind_for_section, ObjSection, ObjSectionKind, ObjSections, SectionIndex,
+};
 pub use splits::{ObjSplit, ObjSplits};
 pub use symbols::{
     best_match_for_reloc, ObjDataKind, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
@@ -47,6 +49,8 @@ pub struct ObjUnit {
     pub autogenerated: bool,
     /// MW `.comment` section version.
     pub comment_version: Option<u8>,
+    /// Influences the order of this unit relative to other ordered units.
+    pub order: Option<i32>,
 }
 
 #[derive(Debug, Clone)]
@@ -130,7 +134,12 @@ impl ObjInfo {
         self.symbols.add(in_symbol, replace)
     }
 
-    pub fn add_split(&mut self, section_index: usize, address: u32, split: ObjSplit) -> Result<()> {
+    pub fn add_split(
+        &mut self,
+        section_index: SectionIndex,
+        address: u32,
+        split: ObjSplit,
+    ) -> Result<()> {
         let section = self
             .sections
             .get_mut(section_index)
@@ -320,8 +329,8 @@ impl ObjInfo {
                 // Include common symbols
                 self.symbols
                     .iter()
-                    .filter(|&symbol| symbol.flags.is_common())
-                    .map(|s| s.size as u32),
+                    .filter(|&(_, symbol)| symbol.flags.is_common())
+                    .map(|(_, s)| s.size as u32),
             )
             .sum()
     }

src/obj/sections.rs

@@ -7,7 +7,10 @@ use std::{
 use anyhow::{anyhow, bail, ensure, Result};
 use itertools::Itertools;
 
-use crate::obj::{ObjKind, ObjRelocations, ObjSplit, ObjSplits, ObjSymbol};
+use crate::{
+    analysis::cfa::SectionAddress,
+    obj::{ObjKind, ObjRelocations, ObjSplit, ObjSplits, ObjSymbol},
+};
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub enum ObjSectionKind {
@@ -26,7 +29,7 @@ pub struct ObjSection {
     pub data: Vec<u8>,
     pub align: u64,
     /// REL files reference the original ELF section indices
-    pub elf_index: usize,
+    pub elf_index: SectionIndex,
     pub relocations: ObjRelocations,
     pub virtual_address: Option<u64>,
     pub file_offset: u64,
@@ -40,38 +43,45 @@ pub struct ObjSections {
     sections: Vec<ObjSection>,
 }
 
+pub type SectionIndex = u32;
+
 impl ObjSections {
     pub fn new(obj_kind: ObjKind, sections: Vec<ObjSection>) -> Self { Self { obj_kind, sections } }
 
-    pub fn iter(&self) -> impl DoubleEndedIterator<Item = (usize, &ObjSection)> {
-        self.sections.iter().enumerate()
+    pub fn iter(&self) -> impl DoubleEndedIterator<Item = (SectionIndex, &ObjSection)> {
+        self.sections.iter().enumerate().map(|(i, s)| (i as SectionIndex, s))
     }
 
-    pub fn iter_mut(&mut self) -> impl DoubleEndedIterator<Item = (usize, &mut ObjSection)> {
-        self.sections.iter_mut().enumerate()
+    pub fn iter_mut(&mut self) -> impl DoubleEndedIterator<Item = (SectionIndex, &mut ObjSection)> {
+        self.sections.iter_mut().enumerate().map(|(i, s)| (i as SectionIndex, s))
     }
 
-    pub fn len(&self) -> usize { self.sections.len() }
+    pub fn len(&self) -> SectionIndex { self.sections.len() as SectionIndex }
 
     pub fn is_empty(&self) -> bool { self.sections.is_empty() }
 
-    pub fn next_section_index(&self) -> usize { self.sections.len() }
+    pub fn next_section_index(&self) -> SectionIndex { self.sections.len() as SectionIndex }
 
-    pub fn get(&self, index: usize) -> Option<&ObjSection> { self.sections.get(index) }
-
-    pub fn get_mut(&mut self, index: usize) -> Option<&mut ObjSection> {
-        self.sections.get_mut(index)
+    pub fn get(&self, index: SectionIndex) -> Option<&ObjSection> {
+        self.sections.get(index as usize)
     }
 
-    pub fn get_elf_index(&self, elf_index: usize) -> Option<(usize, &ObjSection)> {
+    pub fn get_mut(&mut self, index: SectionIndex) -> Option<&mut ObjSection> {
+        self.sections.get_mut(index as usize)
+    }
+
+    pub fn get_elf_index(&self, elf_index: SectionIndex) -> Option<(SectionIndex, &ObjSection)> {
         self.iter().find(|&(_, s)| s.elf_index == elf_index)
     }
 
-    pub fn get_elf_index_mut(&mut self, elf_index: usize) -> Option<(usize, &mut ObjSection)> {
+    pub fn get_elf_index_mut(
+        &mut self,
+        elf_index: SectionIndex,
+    ) -> Option<(SectionIndex, &mut ObjSection)> {
         self.iter_mut().find(|(_, s)| s.elf_index == elf_index)
     }
 
-    pub fn at_address(&self, addr: u32) -> Result<(usize, &ObjSection)> {
+    pub fn at_address(&self, addr: u32) -> Result<(SectionIndex, &ObjSection)> {
         ensure!(
             self.obj_kind == ObjKind::Executable,
             "Use of ObjSections::at_address in relocatable object"
@@ -81,7 +91,7 @@ impl ObjSections {
             .ok_or_else(|| anyhow!("Failed to locate section @ {:#010X}", addr))
     }
 
-    pub fn at_address_mut(&mut self, addr: u32) -> Result<(usize, &mut ObjSection)> {
+    pub fn at_address_mut(&mut self, addr: u32) -> Result<(SectionIndex, &mut ObjSection)> {
         ensure!(
             self.obj_kind == ObjKind::Executable,
             "Use of ObjSections::at_address_mut in relocatable object"
@@ -91,7 +101,7 @@ impl ObjSections {
             .ok_or_else(|| anyhow!("Failed to locate section @ {:#010X}", addr))
     }
 
-    pub fn with_range(&self, range: Range<u32>) -> Result<(usize, &ObjSection)> {
+    pub fn with_range(&self, range: Range<u32>) -> Result<(SectionIndex, &ObjSection)> {
         ensure!(
             self.obj_kind == ObjKind::Executable,
             "Use of ObjSections::with_range in relocatable object"
@@ -104,46 +114,52 @@ impl ObjSections {
     pub fn by_kind(
         &self,
         kind: ObjSectionKind,
-    ) -> impl DoubleEndedIterator<Item = (usize, &ObjSection)> {
+    ) -> impl DoubleEndedIterator<Item = (SectionIndex, &ObjSection)> {
         self.iter().filter(move |(_, s)| s.kind == kind)
     }
 
-    pub fn by_name(&self, name: &str) -> Result<Option<(usize, &ObjSection)>> {
+    pub fn by_name(&self, name: &str) -> Result<Option<(SectionIndex, &ObjSection)>> {
         self.iter()
             .filter(move |(_, s)| s.name == name)
             .at_most_one()
             .map_err(|_| anyhow!("Multiple sections with name {}", name))
     }
 
-    pub fn push(&mut self, section: ObjSection) -> usize {
+    pub fn push(&mut self, section: ObjSection) -> SectionIndex {
         let index = self.sections.len();
         self.sections.push(section);
-        index
+        index as SectionIndex
     }
 
     pub fn all_splits(
         &self,
-    ) -> impl DoubleEndedIterator<Item = (usize, &ObjSection, u32, &ObjSplit)> {
+    ) -> impl DoubleEndedIterator<Item = (SectionIndex, &ObjSection, u32, &ObjSplit)> {
         self.iter()
             .flat_map(|(idx, s)| s.splits.iter().map(move |(addr, split)| (idx, s, addr, split)))
     }
 
-    pub fn common_bss_start(&self) -> Option<(usize, u32)> {
+    pub fn common_bss_start(&self) -> Option<SectionAddress> {
         let Ok(Some((section_index, section))) = self.by_name(".bss") else {
             return None;
         };
-        section.splits.iter().find(|(_, split)| split.common).map(|(addr, _)| (section_index, addr))
+        section
+            .splits
+            .iter()
+            .find(|(_, split)| split.common)
+            .map(|(addr, _)| SectionAddress::new(section_index, addr))
     }
 }
 
-impl Index<usize> for ObjSections {
+impl Index<SectionIndex> for ObjSections {
     type Output = ObjSection;
 
-    fn index(&self, index: usize) -> &Self::Output { &self.sections[index] }
+    fn index(&self, index: SectionIndex) -> &Self::Output { &self.sections[index as usize] }
 }
 
-impl IndexMut<usize> for ObjSections {
-    fn index_mut(&mut self, index: usize) -> &mut Self::Output { &mut self.sections[index] }
+impl IndexMut<SectionIndex> for ObjSections {
+    fn index_mut(&mut self, index: SectionIndex) -> &mut Self::Output {
+        &mut self.sections[index as usize]
+    }
 }
 
 impl ObjSection {
@@ -218,7 +234,7 @@ impl ObjSection {
     }
 }
 
-fn section_kind_for_section(section_name: &str) -> Result<ObjSectionKind> {
+pub fn section_kind_for_section(section_name: &str) -> Result<ObjSectionKind> {
     Ok(match section_name {
         ".init" | ".text" | ".dbgtext" | ".vmtext" => ObjSectionKind::Code,
         ".ctors" | ".dtors" | ".rodata" | ".sdata2" | "extab" | "extabindex" | ".BINARY" => {

src/obj/splits.rs

@@ -4,7 +4,7 @@ use anyhow::{anyhow, Result};
 use itertools::Itertools;
 
 use crate::{
-    obj::{ObjInfo, ObjSection},
+    obj::{ObjInfo, ObjSection, SectionIndex},
     util::{nested::NestedVec, split::default_section_align},
 };
 
@@ -28,7 +28,7 @@ impl ObjSplit {
     pub fn alignment(
         &self,
         obj: &ObjInfo,
-        section_index: usize,
+        section_index: SectionIndex,
         section: &ObjSection,
         split_addr: u32,
     ) -> u32 {

src/obj/symbols.rs

@@ -12,7 +12,7 @@ use serde_repr::{Deserialize_repr, Serialize_repr};
 
 use crate::{
     analysis::cfa::SectionAddress,
-    obj::{ObjKind, ObjRelocKind, ObjSections},
+    obj::{sections::SectionIndex, ObjKind, ObjRelocKind, ObjSections},
     util::{
         config::{is_auto_jump_table, is_auto_label, is_auto_symbol, parse_u32},
         nested::NestedVec,
@@ -187,7 +187,7 @@ pub struct ObjSymbol {
     pub name: String,
     pub demangled_name: Option<String>,
     pub address: u64,
-    pub section: Option<usize>,
+    pub section: Option<SectionIndex>,
     pub size: u64,
     pub size_known: bool,
     pub flags: ObjSymbolFlagSet,
@@ -199,7 +199,7 @@ pub struct ObjSymbol {
     pub demangled_name_hash: Option<u32>,
 }
 
-pub type SymbolIndex = usize;
+pub type SymbolIndex = u32;
 
 #[derive(Debug, Clone)]
 pub struct ObjSymbols {
@@ -216,8 +216,10 @@ impl ObjSymbols {
         let mut symbols_by_section: Vec<BTreeMap<u32, Vec<SymbolIndex>>> = vec![];
         let mut symbols_by_name = HashMap::<String, Vec<SymbolIndex>>::new();
         for (idx, symbol) in symbols.iter().enumerate() {
+            let idx = idx as SymbolIndex;
             symbols_by_address.nested_push(symbol.address as u32, idx);
             if let Some(section_idx) = symbol.section {
+                let section_idx = section_idx as usize;
                 if section_idx >= symbols_by_section.len() {
                     symbols_by_section.resize_with(section_idx + 1, BTreeMap::new);
                 }
@@ -312,7 +314,7 @@ impl ObjSymbols {
             }
             symbol_idx
         } else {
-            let target_symbol_idx = self.symbols.len();
+            let target_symbol_idx = self.symbols.len() as SymbolIndex;
             self.add_direct(ObjSymbol {
                 name: in_symbol.name,
                 demangled_name: in_symbol.demangled_name,
@@ -333,9 +335,10 @@ impl ObjSymbols {
     }
 
     pub fn add_direct(&mut self, in_symbol: ObjSymbol) -> Result<SymbolIndex> {
-        let symbol_idx = self.symbols.len();
+        let symbol_idx = self.symbols.len() as SymbolIndex;
         self.symbols_by_address.nested_push(in_symbol.address as u32, symbol_idx);
         if let Some(section_idx) = in_symbol.section {
+            let section_idx = section_idx as usize;
             if section_idx >= self.symbols_by_section.len() {
                 self.symbols_by_section.resize_with(section_idx + 1, BTreeMap::new);
             }
@@ -355,28 +358,30 @@ impl ObjSymbols {
         Ok(symbol_idx)
     }
 
-    pub fn iter(&self) -> impl DoubleEndedIterator<Item = &ObjSymbol> { self.symbols.iter() }
+    pub fn iter(&self) -> impl DoubleEndedIterator<Item = (SymbolIndex, &ObjSymbol)> {
+        self.symbols.iter().enumerate().map(|(i, s)| (i as SymbolIndex, s))
+    }
 
-    pub fn count(&self) -> usize { self.symbols.len() }
+    pub fn count(&self) -> SymbolIndex { self.symbols.len() as SymbolIndex }
 
     pub fn at_section_address(
         &self,
-        section_idx: usize,
+        section_idx: SectionIndex,
         addr: u32,
     ) -> impl DoubleEndedIterator<Item = (SymbolIndex, &ObjSymbol)> {
         self.symbols_by_section
-            .get(section_idx)
+            .get(section_idx as usize)
             .and_then(|v| v.get(&addr))
             .into_iter()
             .flatten()
-            .map(move |&idx| (idx, &self.symbols[idx]))
+            .map(move |&idx| (idx, &self.symbols[idx as usize]))
             // "Stripped" symbols don't actually exist at the address
             .filter(|(_, sym)| !sym.flags.is_stripped())
     }
 
     pub fn kind_at_section_address(
         &self,
-        section_idx: usize,
+        section_idx: SectionIndex,
         addr: u32,
         kind: ObjSymbolKind,
     ) -> Result<Option<(SymbolIndex, &ObjSymbol)>> {
@@ -397,7 +402,7 @@ impl ObjSymbols {
         self.symbols_by_section
             .iter()
             .flat_map(|v| v.iter().map(|(_, v)| v))
-            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u])))
+            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u as usize])))
     }
 
     // Iterate over all ABS symbols
@@ -405,24 +410,24 @@ impl ObjSymbols {
         debug_assert!(self.obj_kind == ObjKind::Executable);
         self.symbols_by_address
             .iter()
-            .flat_map(|(_, v)| v.iter().map(|&u| (u, &self.symbols[u])))
+            .flat_map(|(_, v)| v.iter().map(|&u| (u, &self.symbols[u as usize])))
             .filter(|(_, s)| s.section.is_none())
     }
 
     // Iterate over range in address ascending order, excluding ABS symbols
     pub fn for_section_range<R>(
         &self,
-        section_index: usize,
+        section_index: SectionIndex,
         range: R,
     ) -> impl DoubleEndedIterator<Item = (SymbolIndex, &ObjSymbol)>
     where
         R: RangeBounds<u32> + Clone,
     {
         self.symbols_by_section
-            .get(section_index)
+            .get(section_index as usize)
             .into_iter()
             .flat_map(move |v| v.range(range.clone()))
-            .flat_map(move |(_, v)| v.iter().map(move |u| (*u, &self.symbols[*u])))
+            .flat_map(move |(_, v)| v.iter().map(move |u| (*u, &self.symbols[*u as usize])))
     }
 
     pub fn indexes_for_range<R>(
@@ -438,13 +443,13 @@ impl ObjSymbols {
 
     pub fn for_section(
         &self,
-        section_idx: usize,
+        section_idx: SectionIndex,
     ) -> impl DoubleEndedIterator<Item = (SymbolIndex, &ObjSymbol)> {
         self.symbols_by_section
-            .get(section_idx)
+            .get(section_idx as usize)
             .into_iter()
             .flat_map(|v| v.iter().map(|(_, v)| v))
-            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u])))
+            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u as usize])))
     }
 
     pub fn for_name(
@@ -454,7 +459,7 @@ impl ObjSymbols {
         self.symbols_by_name
             .get(name)
             .into_iter()
-            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u])))
+            .flat_map(move |v| v.iter().map(move |u| (*u, &self.symbols[*u as usize])))
     }
 
     pub fn by_name(&self, name: &str) -> Result<Option<(SymbolIndex, &ObjSymbol)>> {
@@ -515,11 +520,11 @@ impl ObjSymbols {
         &self,
         kind: ObjSymbolKind,
     ) -> impl DoubleEndedIterator<Item = (SymbolIndex, &ObjSymbol)> {
-        self.symbols.iter().enumerate().filter(move |(_, sym)| sym.kind == kind)
+        self.iter().filter(move |(_, sym)| sym.kind == kind)
     }
 
     pub fn replace(&mut self, index: SymbolIndex, symbol: ObjSymbol) -> Result<()> {
-        let symbol_ref = &mut self.symbols[index];
+        let symbol_ref = &mut self.symbols[index as usize];
         ensure!(symbol_ref.address == symbol.address, "Can't modify address with replace_symbol");
         ensure!(symbol_ref.section == symbol.section, "Can't modify section with replace_symbol");
         if symbol_ref.name != symbol.name {
@@ -545,7 +550,7 @@ impl ObjSymbols {
         for (_addr, symbol_idxs) in self.indexes_for_range(..=target_addr.address).rev() {
             let symbols = symbol_idxs
                 .iter()
-                .map(|&idx| (idx, &self.symbols[idx]))
+                .map(|&idx| (idx, &self.symbols[idx as usize]))
                 .filter(|(_, sym)| {
                     (sym.section.is_none() || sym.section == Some(target_addr.section))
                         && sym.referenced_by(reloc_kind)
@@ -570,14 +575,14 @@ impl ObjSymbols {
 
     #[inline]
     pub fn flags(&mut self, idx: SymbolIndex) -> &mut ObjSymbolFlagSet {
-        &mut self.symbols[idx].flags
+        &mut self.symbols[idx as usize].flags
     }
 }
 
 impl Index<SymbolIndex> for ObjSymbols {
     type Output = ObjSymbol;
 
-    fn index(&self, index: usize) -> &Self::Output { &self.symbols[index] }
+    fn index(&self, index: SymbolIndex) -> &Self::Output { &self.symbols[index as usize] }
 }
 
 impl ObjSymbol {

src/util/alf.rs

@@ -7,7 +7,7 @@ use anyhow::Result;
 use io::{Error, ErrorKind};
 
 use crate::{
-    obj::{ObjSymbol, ObjSymbolKind},
+    obj::{ObjSymbol, ObjSymbolKind, SectionIndex},
     util::{
         dol::{DolLike, DolSection, DolSectionKind},
         reader::{
@@ -55,7 +55,7 @@ impl FromReader for AlfFile {
                 data_size: section.data_size,
                 size: section.size,
                 kind,
-                index: sections.len(),
+                index: sections.len() as SectionIndex,
             });
         }
         for sym in &symtab.symbols {
@@ -230,7 +230,7 @@ impl AlfSymbol {
             name,
             demangled_name,
             address: self.address as u64,
-            section: Some(self.section as usize - 1),
+            section: Some(self.section as SectionIndex - 1),
             size: self.size as u64,
             size_known: true,
             flags: Default::default(),

src/util/asm.rs

@@ -11,7 +11,7 @@ use ppc750cl::{Argument, Ins, InsIter, Opcode};
 use crate::{
     obj::{
         ObjDataKind, ObjInfo, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbol,
-        ObjSymbolKind,
+        ObjSymbolKind, SymbolIndex,
     },
     util::nested::NestedVec,
 };
@@ -25,7 +25,7 @@ enum SymbolEntryKind {
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 struct SymbolEntry {
-    index: usize,
+    index: SymbolIndex,
     kind: SymbolEntryKind,
 }
 
@@ -44,7 +44,7 @@ where W: Write + ?Sized {
     }
 
     // We'll append generated symbols to the end
-    let mut symbols: Vec<ObjSymbol> = obj.symbols.iter().cloned().collect();
+    let mut symbols: Vec<ObjSymbol> = obj.symbols.iter().map(|(_, s)| s.clone()).collect();
     let mut section_entries: Vec<BTreeMap<u32, Vec<SymbolEntry>>> = vec![];
     let mut section_relocations: Vec<BTreeMap<u32, ObjReloc>> = vec![];
     for (section_idx, section) in obj.sections.iter() {
@@ -90,7 +90,7 @@ where W: Write + ?Sized {
                         .map(|e| e.index);
                     if target_symbol_idx.is_none() {
                         let display_address = address as u64 + section.virtual_address.unwrap_or(0);
-                        let symbol_idx = symbols.len();
+                        let symbol_idx = symbols.len() as SymbolIndex;
                         symbols.push(ObjSymbol {
                             name: format!(".L_{display_address:08X}"),
                             address: display_address,
@@ -131,7 +131,7 @@ where W: Write + ?Sized {
             if reloc.addend == 0 {
                 continue;
             }
-            let target = &symbols[reloc.target_symbol];
+            let target = &symbols[reloc.target_symbol as usize];
             let target_section_idx = match target.section {
                 Some(v) => v,
                 None => continue,
@@ -140,7 +140,7 @@ where W: Write + ?Sized {
                 anyhow!("Invalid relocation target section: {:#010X} {:?}", reloc_address, target)
             })?;
             let address = (target.address as i64 + reloc.addend) as u64;
-            let vec = match section_entries[target_section_idx].entry(address as u32) {
+            let vec = match section_entries[target_section_idx as usize].entry(address as u32) {
                 btree_map::Entry::Occupied(e) => e.into_mut(),
                 btree_map::Entry::Vacant(e) => e.insert(vec![]),
             };
@@ -149,7 +149,7 @@ where W: Write + ?Sized {
                 .any(|e| e.kind == SymbolEntryKind::Label || e.kind == SymbolEntryKind::Start)
             {
                 let display_address = address + target_section.virtual_address.unwrap_or(0);
-                let symbol_idx = symbols.len();
+                let symbol_idx = symbols.len() as SymbolIndex;
                 symbols.push(ObjSymbol {
                     name: format!(".L_{display_address:08X}"),
                     address: display_address,
@@ -181,13 +181,17 @@ where W: Write + ?Sized {
     }
 
     for (section_index, section) in obj.sections.iter() {
-        let entries = &section_entries[section_index];
-        let relocations = &section_relocations[section_index];
+        let entries = &section_entries[section_index as usize];
+        let relocations = &section_relocations[section_index as usize];
 
         let mut current_address = section.address as u32;
         let section_end = (section.address + section.size) as u32;
-        let subsection =
-            obj.sections.iter().take(section_index).filter(|(_, s)| s.name == section.name).count();
+        let subsection = obj
+            .sections
+            .iter()
+            .take(section_index as usize)
+            .filter(|(_, s)| s.name == section.name)
+            .count();
 
         loop {
             if current_address >= section_end {
@@ -369,7 +373,7 @@ fn write_symbol_entry<W>(
 where
     W: Write + ?Sized,
 {
-    let symbol = &symbols[entry.index];
+    let symbol = &symbols[entry.index as usize];
 
     // Skip writing certain symbols
     if symbol.kind == ObjSymbolKind::Section {
@@ -432,9 +436,37 @@ where
         write_symbol_name(w, &symbol.name)?;
         writeln!(w)?;
     }
+
+    if entry.kind == SymbolEntryKind::Start && section.name == "extab" {
+        writeln!(w, "/*")?;
+        match parse_extab(symbols, entry, section) {
+            Ok(s) => {
+                for line in s.trim_end().lines() {
+                    writeln!(w, " * {}", line)?;
+                }
+            }
+            Err(e) => {
+                log::warn!("Failed to decode extab entry {}: {}", symbol.name, e);
+                writeln!(w, " * Failed to decode extab entry: {}", e)?;
+            }
+        }
+        writeln!(w, " */")?;
+    }
     Ok(())
 }
 
+fn parse_extab(symbols: &[ObjSymbol], entry: &SymbolEntry, section: &ObjSection) -> Result<String> {
+    let symbol = &symbols[entry.index as usize];
+    let data = section.symbol_data(symbol)?;
+    let decoded = cwextab::decode_extab(data)?;
+    let function_names = section
+        .relocations
+        .range(symbol.address as u32..(symbol.address + symbol.size) as u32)
+        .map(|(_, reloc)| symbols[reloc.target_symbol as usize].name.clone())
+        .collect_vec();
+    decoded.to_string(function_names).ok_or_else(|| anyhow!("Failed to print extab entry"))
+}
+
 #[allow(clippy::too_many_arguments)]
 fn write_data<W>(
     w: &mut W,
@@ -476,7 +508,7 @@ where
                     .with_context(|| format!("At address {:#010X}", sym_addr))?;
                 entry = entry_iter.next();
             } else if current_address > sym_addr {
-                let dbg_symbols = vec.iter().map(|e| &symbols[e.index]).collect_vec();
+                let dbg_symbols = vec.iter().map(|e| &symbols[e.index as usize]).collect_vec();
                 bail!(
                     "Unaligned symbol entry @ {:#010X}:\n\t{:?}",
                     section.virtual_address.unwrap_or(0) as u32 + sym_addr,
@@ -557,7 +589,7 @@ fn find_symbol_kind(
     for entry in entries {
         match entry.kind {
             SymbolEntryKind::Start => {
-                let new_kind = symbols[entry.index].kind;
+                let new_kind = symbols[entry.index as usize].kind;
                 if !matches!(new_kind, ObjSymbolKind::Unknown | ObjSymbolKind::Section) {
                     ensure!(
                         !found || new_kind == kind,
@@ -583,11 +615,11 @@ fn find_data_kind(
     for entry in entries {
         match entry.kind {
             SymbolEntryKind::Start => {
-                let new_kind = symbols[entry.index].data_kind;
+                let new_kind = symbols[entry.index as usize].data_kind;
                 if !matches!(new_kind, ObjDataKind::Unknown) {
                     if found && new_kind != kind {
                         for entry in entries {
-                            log::error!("Symbol {:?}", symbols[entry.index]);
+                            log::error!("Symbol {:?}", symbols[entry.index as usize]);
                         }
                         bail!(
                             "Conflicting data kinds found: {kind:?} and {new_kind:?}",
@@ -778,14 +810,14 @@ where
         ObjRelocKind::Absolute => {
             // Attempt to use .rel macro for relative relocations
             if reloc.addend != 0 {
-                let target = &symbols[reloc.target_symbol];
+                let target = &symbols[reloc.target_symbol as usize];
                 let target_addr = (target.address as i64 + reloc.addend) as u32;
                 if let Some(entry) = target
                     .section
-                    .and_then(|section_idx| section_entries[section_idx].get(&target_addr))
+                    .and_then(|section_idx| section_entries[section_idx as usize].get(&target_addr))
                     .and_then(|entries| entries.iter().find(|e| e.kind == SymbolEntryKind::Label))
                 {
-                    let symbol = &symbols[entry.index];
+                    let symbol = &symbols[entry.index as usize];
                     write!(w, "\t.rel ")?;
                     write_symbol_name(w, &target.name)?;
                     write!(w, ", ")?;
@@ -931,7 +963,7 @@ fn write_reloc_symbol<W>(
 where
     W: Write + ?Sized,
 {
-    write_symbol_name(w, &symbols[reloc.target_symbol].name)?;
+    write_symbol_name(w, &symbols[reloc.target_symbol as usize].name)?;
     match reloc.addend.cmp(&0i64) {
         Ordering::Greater => write!(w, "+{:#X}", reloc.addend),
         Ordering::Less => write!(w, "-{:#X}", -reloc.addend),

src/util/config.rs

@@ -2,7 +2,6 @@ use std::{
     fs,
     io::{BufRead, Write},
     num::ParseIntError,
-    path::Path,
     str::FromStr,
 };
 
@@ -12,18 +11,20 @@ use filetime::FileTime;
 use once_cell::sync::Lazy;
 use regex::{Captures, Regex};
 use tracing::{debug, info, warn};
+use typed_path::Utf8NativePath;
 use xxhash_rust::xxh3::xxh3_64;
 
 use crate::{
     analysis::cfa::SectionAddress,
     obj::{
         ObjDataKind, ObjInfo, ObjKind, ObjSectionKind, ObjSplit, ObjSymbol, ObjSymbolFlagSet,
-        ObjSymbolFlags, ObjSymbolKind, ObjUnit,
+        ObjSymbolFlags, ObjSymbolKind, ObjUnit, SectionIndex,
     },
     util::{
-        file::{buf_writer, map_file, FileReadInfo},
+        file::{buf_writer, FileReadInfo},
         split::default_section_align,
     },
+    vfs::open_file,
 };
 
 pub fn parse_u32(s: &str) -> Result<u32, ParseIntError> {
@@ -34,12 +35,24 @@ pub fn parse_u32(s: &str) -> Result<u32, ParseIntError> {
     }
 }
 
-pub fn apply_symbols_file<P>(path: P, obj: &mut ObjInfo) -> Result<Option<FileReadInfo>>
-where P: AsRef<Path> {
-    Ok(if path.as_ref().is_file() {
-        let file = map_file(path)?;
-        let cached = FileReadInfo::new(&file)?;
-        for result in file.as_reader().lines() {
+pub fn parse_i32(s: &str) -> Result<i32, ParseIntError> {
+    if let Some(s) = s.strip_prefix("-0x").or_else(|| s.strip_prefix("-0X")) {
+        i32::from_str_radix(s, 16).map(|v| -v)
+    } else if let Some(s) = s.strip_prefix("0x").or_else(|| s.strip_prefix("0X")) {
+        i32::from_str_radix(s, 16)
+    } else {
+        s.parse::<i32>()
+    }
+}
+
+pub fn apply_symbols_file(
+    path: &Utf8NativePath,
+    obj: &mut ObjInfo,
+) -> Result<Option<FileReadInfo>> {
+    Ok(if fs::metadata(path).is_ok_and(|m| m.is_file()) {
+        let mut file = open_file(path, true)?;
+        let cached = FileReadInfo::new(file.as_mut())?;
+        for result in file.lines() {
             let line = match result {
                 Ok(line) => line,
                 Err(e) => bail!("Failed to process symbols file: {e:?}"),
@@ -187,19 +200,21 @@ pub fn is_auto_label(symbol: &ObjSymbol) -> bool { symbol.name.starts_with("lbl_
 
 pub fn is_auto_jump_table(symbol: &ObjSymbol) -> bool { symbol.name.starts_with("jumptable_") }
 
-fn write_if_unchanged<P, Cb>(path: P, cb: Cb, cached_file: Option<FileReadInfo>) -> Result<()>
+fn write_if_unchanged<Cb>(
+    path: &Utf8NativePath,
+    cb: Cb,
+    cached_file: Option<FileReadInfo>,
+) -> Result<()>
 where
-    P: AsRef<Path>,
     Cb: FnOnce(&mut dyn Write) -> Result<()>,
 {
     if let Some(cached_file) = cached_file {
         // Check file mtime
-        let path = path.as_ref();
         let new_mtime = fs::metadata(path).ok().map(|m| FileTime::from_last_modification_time(&m));
-        if let Some(new_mtime) = new_mtime {
-            if new_mtime != cached_file.mtime {
+        if let (Some(new_mtime), Some(old_mtime)) = (new_mtime, cached_file.mtime) {
+            if new_mtime != old_mtime {
                 // File changed, don't write
-                warn!(path = %path.display(), "File changed since read, not updating");
+                warn!(path = %path, "File changed since read, not updating");
                 return Ok(());
             }
         }
@@ -209,12 +224,12 @@ where
         cb(&mut buf)?;
         if xxh3_64(&buf) == cached_file.hash {
             // No changes
-            debug!(path = %path.display(), "File unchanged");
+            debug!(path = %path, "File unchanged");
             return Ok(());
         }
 
         // Write to file
-        info!("Writing updated {}", path.display());
+        info!("Writing updated {}", path);
         fs::write(path, &buf)?;
     } else {
         // Write directly
@@ -226,14 +241,11 @@ where
 }
 
 #[inline]
-pub fn write_symbols_file<P>(
-    path: P,
+pub fn write_symbols_file(
+    path: &Utf8NativePath,
     obj: &ObjInfo,
     cached_file: Option<FileReadInfo>,
-) -> Result<()>
-where
-    P: AsRef<Path>,
-{
+) -> Result<()> {
     write_if_unchanged(path, |w| write_symbols(w, obj), cached_file)
 }
 
@@ -401,15 +413,12 @@ fn section_kind_to_str(kind: ObjSectionKind) -> &'static str {
 }
 
 #[inline]
-pub fn write_splits_file<P>(
-    path: P,
+pub fn write_splits_file(
+    path: &Utf8NativePath,
     obj: &ObjInfo,
     all: bool,
     cached_file: Option<FileReadInfo>,
-) -> Result<()>
-where
-    P: AsRef<Path>,
-{
+) -> Result<()> {
     write_if_unchanged(path, |w| write_splits(w, obj, all), cached_file)
 }
 
@@ -428,6 +437,9 @@ where W: Write + ?Sized {
         if let Some(comment_version) = unit.comment_version {
             write!(w, " comment:{}", comment_version)?;
         }
+        if let Some(order) = unit.order {
+            write!(w, " order:{}", order)?;
+        }
         writeln!(w)?;
         let mut split_iter = obj.sections.all_splits().peekable();
         while let Some((_section_index, section, addr, split)) = split_iter.next() {
@@ -475,6 +487,8 @@ struct SplitUnit {
     name: String,
     /// MW `.comment` section version
     comment_version: Option<u8>,
+    /// Influences the order of this unit relative to other ordered units.
+    order: Option<i32>,
 }
 
 pub struct SectionDef {
@@ -515,12 +529,13 @@ fn parse_unit_line(captures: Captures) -> Result<SplitLine> {
     if name == "Sections" {
         return Ok(SplitLine::SectionsStart);
     }
-    let mut unit = SplitUnit { name: name.to_string(), comment_version: None };
+    let mut unit = SplitUnit { name: name.to_string(), comment_version: None, order: None };
 
     for attr in captures["attrs"].split(' ').filter(|&s| !s.is_empty()) {
         if let Some((attr, value)) = attr.split_once(':') {
             match attr {
                 "comment" => unit.comment_version = Some(u8::from_str(value)?),
+                "order" => unit.order = Some(parse_i32(value)?),
                 _ => bail!("Unknown unit attribute '{}'", attr),
             }
         } else {
@@ -603,16 +618,15 @@ fn parse_section_line(captures: Captures, state: &SplitState) -> Result<SplitLin
 
 enum SplitState {
     None,
-    Sections(usize),
+    Sections(SectionIndex),
     Unit(String),
 }
 
-pub fn apply_splits_file<P>(path: P, obj: &mut ObjInfo) -> Result<Option<FileReadInfo>>
-where P: AsRef<Path> {
-    Ok(if path.as_ref().is_file() {
-        let file = map_file(path)?;
-        let cached = FileReadInfo::new(&file)?;
-        apply_splits(&mut file.as_reader(), obj)?;
+pub fn apply_splits_file(path: &Utf8NativePath, obj: &mut ObjInfo) -> Result<Option<FileReadInfo>> {
+    Ok(if fs::metadata(path).is_ok_and(|m| m.is_file()) {
+        let mut file = open_file(path, true)?;
+        let cached = FileReadInfo::new(file.as_mut())?;
+        apply_splits(file.as_mut(), obj)?;
         Some(cached)
     } else {
         None
@@ -631,12 +645,13 @@ where R: BufRead + ?Sized {
         match (&mut state, split_line) {
             (
                 SplitState::None | SplitState::Unit(_) | SplitState::Sections(_),
-                SplitLine::Unit(SplitUnit { name, comment_version }),
+                SplitLine::Unit(SplitUnit { name, comment_version, order }),
             ) => {
                 obj.link_order.push(ObjUnit {
                     name: name.clone(),
                     autogenerated: false,
                     comment_version,
+                    order,
                 });
                 state = SplitState::Unit(name);
             }
@@ -718,16 +733,14 @@ where R: BufRead + ?Sized {
     Ok(())
 }
 
-pub fn read_splits_sections<P>(path: P) -> Result<Option<Vec<SectionDef>>>
-where P: AsRef<Path> {
-    if !path.as_ref().is_file() {
+pub fn read_splits_sections(path: &Utf8NativePath) -> Result<Option<Vec<SectionDef>>> {
+    if !fs::metadata(path).is_ok_and(|m| m.is_file()) {
         return Ok(None);
     }
-    let file = map_file(path)?;
-    let r = file.as_reader();
+    let file = open_file(path, true)?;
     let mut sections = Vec::new();
     let mut state = SplitState::None;
-    for result in r.lines() {
+    for result in file.lines() {
         let line = match result {
             Ok(line) => line,
             Err(e) => return Err(e.into()),

src/util/dep.rs

@@ -1,40 +1,39 @@
-use std::{
-    io::Write,
-    path::{Path, PathBuf},
-};
+use std::io::Write;
 
 use itertools::Itertools;
-use path_slash::PathBufExt;
-
-use crate::util::file::split_path;
+use typed_path::{Utf8NativePath, Utf8NativePathBuf, Utf8UnixPathBuf};
 
 pub struct DepFile {
-    pub name: PathBuf,
-    pub dependencies: Vec<PathBuf>,
+    pub name: Utf8UnixPathBuf,
+    pub dependencies: Vec<Utf8UnixPathBuf>,
+}
+
+fn normalize_path(path: Utf8NativePathBuf) -> Utf8UnixPathBuf {
+    if let Some((a, _)) = path.as_str().split_once(':') {
+        Utf8NativePath::new(a).with_unix_encoding()
+    } else {
+        path.with_unix_encoding()
+    }
 }
 
 impl DepFile {
-    pub fn new(name: PathBuf) -> Self { Self { name, dependencies: vec![] } }
-
-    pub fn push<P>(&mut self, dependency: P)
-    where P: AsRef<Path> {
-        let path = split_path(dependency.as_ref())
-            .map(|(p, _)| p)
-            .unwrap_or_else(|_| dependency.as_ref().to_path_buf());
-        self.dependencies.push(path);
+    pub fn new(name: Utf8NativePathBuf) -> Self {
+        Self { name: name.with_unix_encoding(), dependencies: vec![] }
     }
 
-    pub fn extend(&mut self, dependencies: Vec<PathBuf>) {
-        self.dependencies.extend(dependencies.iter().map(|dependency| {
-            split_path(dependency).map(|(p, _)| p).unwrap_or_else(|_| dependency.clone())
-        }));
+    pub fn push(&mut self, dependency: Utf8NativePathBuf) {
+        self.dependencies.push(normalize_path(dependency));
+    }
+
+    pub fn extend(&mut self, dependencies: Vec<Utf8NativePathBuf>) {
+        self.dependencies.extend(dependencies.into_iter().map(normalize_path));
     }
 
     pub fn write<W>(&self, w: &mut W) -> std::io::Result<()>
     where W: Write + ?Sized {
-        write!(w, "{}:", self.name.to_slash_lossy())?;
+        write!(w, "{}:", self.name)?;
         for dep in self.dependencies.iter().unique() {
-            write!(w, " \\\n  {}", dep.to_slash_lossy().replace(' ', "\\ "))?;
+            write!(w, " \\\n  {}", dep.as_str().replace(' ', "\\ "))?;
         }
         Ok(())
     }

src/util/diff.rs

@@ -1,4 +1,5 @@
 //! This includes helpers to convert between decomp-toolkit types and objdiff-core types.
+//!
 //! Eventually it'd be nice to share [ObjInfo] and related types between decomp-toolkit and
 //! objdiff-core to avoid this conversion.
 use std::{
@@ -28,7 +29,7 @@ pub fn process_code(
     section: &ObjSection,
     config: &DiffObjConfig,
 ) -> Result<ProcessCodeResult> {
-    let arch = objdiff_core::arch::ppc::ObjArchPpc {};
+    let arch = objdiff_core::arch::ppc::ObjArchPpc { extab: None };
     let orig_relocs = section
         .relocations
         .range(symbol.address as u32..symbol.address as u32 + symbol.size as u32)
@@ -39,7 +40,7 @@ pub fn process_code(
     arch.process_code(
         symbol.address,
         orig_data,
-        section.elf_index,
+        section.elf_index as usize,
         &orig_relocs,
         &Default::default(),
         config,
@@ -224,8 +225,11 @@ fn print_line(ins_diff: &ObjInsDiff, base_addr: u64) -> Vec<Span> {
                     base_color = COLOR_ROTATION[diff.idx % COLOR_ROTATION.len()]
                 }
             }
-            DiffText::BranchDest(addr) => {
+            DiffText::BranchDest(addr, diff) => {
                 label_text = format!("{addr:x}");
+                if let Some(diff) = diff {
+                    base_color = COLOR_ROTATION[diff.idx % COLOR_ROTATION.len()]
+                }
             }
             DiffText::Symbol(sym) => {
                 let name = sym.demangled_name.as_ref().unwrap_or(&sym.name);
@@ -287,6 +291,7 @@ fn to_objdiff_symbol(
     if symbol.flags.is_hidden() {
         flags.0 |= objdiff_core::obj::ObjSymbolFlags::Hidden;
     }
+    let bytes = section.and_then(|s| s.symbol_data(symbol).ok()).map_or(vec![], |d| d.to_vec());
     objdiff_core::obj::ObjSymbol {
         name: symbol.name.clone(),
         demangled_name: symbol.demangled_name.clone(),
@@ -297,6 +302,8 @@ fn to_objdiff_symbol(
         flags,
         addend,
         virtual_address: None,
+        original_index: None,
+        bytes,
     }
 }
 

src/util/dol.rs

@@ -11,7 +11,7 @@ use crate::{
     array_ref,
     obj::{
         ObjArchitecture, ObjInfo, ObjKind, ObjSection, ObjSectionKind, ObjSymbol, ObjSymbolFlagSet,
-        ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbolFlags, ObjSymbolKind, SectionIndex,
     },
     util::{
         alf::{AlfFile, AlfSymbol, ALF_MAGIC},
@@ -75,7 +75,7 @@ pub struct DolSection {
     pub size: u32,
     pub kind: DolSectionKind,
     // TODO remove
-    pub index: usize,
+    pub index: SectionIndex,
 }
 
 #[derive(Debug, Clone)]
@@ -103,7 +103,7 @@ impl FromReader for DolFile {
                 data_size: size,
                 size,
                 kind: DolSectionKind::Text,
-                index: sections.len(),
+                index: sections.len() as SectionIndex,
             });
         }
         for (idx, &size) in header.data_sizes.iter().enumerate() {
@@ -116,7 +116,7 @@ impl FromReader for DolFile {
                 data_size: size,
                 size,
                 kind: DolSectionKind::Data,
-                index: sections.len(),
+                index: sections.len() as SectionIndex,
             });
         }
         sections.push(DolSection {
@@ -125,7 +125,7 @@ impl FromReader for DolFile {
             data_size: 0,
             size: header.bss_size,
             kind: DolSectionKind::Bss,
-            index: sections.len(),
+            index: sections.len() as SectionIndex,
         });
         Ok(Self { header, sections })
     }
@@ -286,8 +286,8 @@ pub fn process_dol(buf: &[u8], name: &str) -> Result<ObjInfo> {
         dol.sections().iter().filter(|section| section.kind == DolSectionKind::Text).count();
     let mut eti_entries: Vec<EtiEntry> = Vec::new();
     let mut eti_init_info_range: Option<(u32, u32)> = None;
-    let mut extab_section: Option<usize> = None;
-    let mut extabindex_section: Option<usize> = None;
+    let mut extab_section: Option<SectionIndex> = None;
+    let mut extabindex_section: Option<SectionIndex> = None;
     'outer: for dol_section in
         dol.sections().iter().filter(|section| section.kind == DolSectionKind::Data)
     {
@@ -537,8 +537,9 @@ pub fn process_dol(buf: &[u8], name: &str) -> Result<ObjInfo> {
     }
 
     // Apply section indices
-    let mut init_section_index = None;
+    let mut init_section_index: Option<SectionIndex> = None;
     for (idx, section) in sections.iter_mut().enumerate() {
+        let idx = idx as SectionIndex;
         match section.name.as_str() {
             ".init" => {
                 init_section_index = Some(idx);

src/util/dwarf.rs

@@ -274,6 +274,7 @@ pub enum AttributeKind {
     Prototyped = 0x0270 | (FormKind::String as u16),
     Public = 0x0280 | (FormKind::String as u16),
     PureVirtual = 0x0290 | (FormKind::String as u16),
+    PureVirtualBlock2 = 0x0290 | (FormKind::Block2 as u16),
     ReturnAddr = 0x02a0 | (FormKind::Block2 as u16),
     Specification = 0x02b0 | (FormKind::Ref as u16),
     StartScope = 0x02c0 | (FormKind::Data4 as u16),
@@ -283,6 +284,7 @@ pub enum AttributeKind {
     UpperBoundData4 = 0x02f0 | (FormKind::Data4 as u16),
     UpperBoundData8 = 0x02f0 | (FormKind::Data8 as u16),
     Virtual = 0x0300 | (FormKind::String as u16),
+    VirtualBlock2 = 0x0300 | (FormKind::Block2 as u16),
     LoUser = 0x2000,
     HiUser = 0x3ff0,
     // User types

src/util/elf.rs

@@ -12,7 +12,7 @@ use indexmap::IndexMap;
 use objdiff_core::obj::split_meta::{SplitMeta, SHT_SPLITMETA, SPLITMETA_SECTION};
 use object::{
     elf,
-    elf::{SHF_ALLOC, SHF_EXECINSTR, SHF_WRITE, SHT_NOBITS, SHT_PROGBITS},
+    elf::{SHF_ALLOC, SHF_EXECINSTR, SHF_WRITE, SHT_LOUSER, SHT_NOBITS, SHT_PROGBITS},
     write::{
         elf::{ProgramHeader, Rel, SectionHeader, SectionIndex, SymbolIndex, Writer},
         StringId,
@@ -20,20 +20,24 @@ use object::{
     Architecture, Endianness, Object, ObjectKind, ObjectSection, ObjectSymbol, Relocation,
     RelocationFlags, RelocationTarget, SectionKind, Symbol, SymbolKind, SymbolScope, SymbolSection,
 };
+use typed_path::Utf8NativePath;
 
 use crate::{
     array_ref,
     obj::{
         ObjArchitecture, ObjInfo, ObjKind, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind,
         ObjSplit, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind, ObjUnit,
+        SectionIndex as ObjSectionIndex, SymbolIndex as ObjSymbolIndex,
     },
     util::{
         comment::{CommentSym, MWComment},
-        file::map_file,
         reader::{Endian, FromReader, ToWriter},
     },
+    vfs::open_file,
 };
 
+pub const SHT_MWCATS: u32 = SHT_LOUSER + 0x4A2A82C2;
+
 enum BoundaryState {
     /// Looking for a file symbol, any section symbols are queued
     LookForFile(Vec<(u64, String)>),
@@ -43,10 +47,9 @@ enum BoundaryState {
     FilesEnded,
 }
 
-pub fn process_elf<P>(path: P) -> Result<ObjInfo>
-where P: AsRef<Path> {
-    let file = map_file(path)?;
-    let obj_file = object::read::File::parse(file.as_slice())?;
+pub fn process_elf(path: &Utf8NativePath) -> Result<ObjInfo> {
+    let mut file = open_file(path, true)?;
+    let obj_file = object::read::File::parse(file.map()?)?;
     let architecture = match obj_file.architecture() {
         Architecture::PowerPc => ObjArchitecture::PowerPc,
         arch => bail!("Unexpected architecture: {arch:?}"),
@@ -68,7 +71,7 @@ where P: AsRef<Path> {
     let mut sda2_base: Option<u32> = None;
 
     let mut sections: Vec<ObjSection> = vec![];
-    let mut section_indexes: Vec<Option<usize>> = vec![];
+    let mut section_indexes: Vec<Option<usize>> = vec![None /* ELF null section */];
     for section in obj_file.sections() {
         if section.size() == 0 {
             section_indexes.push(None);
@@ -94,7 +97,7 @@ where P: AsRef<Path> {
             size: section.size(),
             data: section.uncompressed_data()?.to_vec(),
             align: section.align(),
-            elf_index: section.index().0,
+            elf_index: section.index().0 as ObjSectionIndex,
             relocations: Default::default(),
             virtual_address: None, // Loaded from section symbol
             file_offset: section.file_range().map(|(v, _)| v).unwrap_or_default(),
@@ -113,6 +116,7 @@ where P: AsRef<Path> {
                 .context("While reading .comment section")?;
             log::debug!("Loaded .comment section header {:?}", header);
             let mut comment_syms = Vec::with_capacity(obj_file.symbols().count());
+            comment_syms.push(CommentSym::from_reader(&mut reader, Endian::Big)?); // ELF null symbol
             for symbol in obj_file.symbols() {
                 let comment_sym = CommentSym::from_reader(&mut reader, Endian::Big)?;
                 log::debug!("Symbol {:?} -> Comment {:?}", symbol, comment_sym);
@@ -147,7 +151,7 @@ where P: AsRef<Path> {
     };
 
     let mut symbols: Vec<ObjSymbol> = vec![];
-    let mut symbol_indexes: Vec<Option<usize>> = vec![];
+    let mut symbol_indexes: Vec<Option<ObjSymbolIndex>> = vec![None /* ELF null symbol */];
     let mut section_starts = IndexMap::<String, Vec<(u64, String)>>::new();
     let mut name_to_index = HashMap::<String, usize>::new(); // for resolving duplicate names
     let mut boundary_state = BoundaryState::LookForFile(Default::default());
@@ -235,7 +239,9 @@ where P: AsRef<Path> {
                     .and_then(|m| m.virtual_addresses.as_ref())
                     .and_then(|v| v.get(symbol.index().0).cloned())
                 {
-                    sections[section_index.0].virtual_address = Some(addr);
+                    if let Some(section_index) = section_indexes[section_index.0] {
+                        sections[section_index].virtual_address = Some(addr);
+                    }
                 }
 
                 let section = obj_file.section_by_index(section_index)?;
@@ -297,13 +303,13 @@ where P: AsRef<Path> {
         }
 
         // Generate symbols
-        if matches!(symbol.kind(), SymbolKind::Null | SymbolKind::File)
+        if matches!(symbol.kind(), SymbolKind::File)
             || matches!(symbol.section_index(), Some(idx) if section_indexes[idx.0].is_none())
         {
             symbol_indexes.push(None);
             continue;
         }
-        symbol_indexes.push(Some(symbols.len()));
+        symbol_indexes.push(Some(symbols.len() as ObjSymbolIndex));
         let align = mw_comment.as_ref().map(|(_, vec)| vec[symbol.index().0].align);
         symbols.push(to_obj_symbol(&obj_file, &symbol, &section_indexes, align)?);
     }
@@ -316,6 +322,7 @@ where P: AsRef<Path> {
                 name: file_name.clone(),
                 autogenerated: false,
                 comment_version: None,
+                order: None,
             });
         }
 
@@ -345,8 +352,9 @@ where P: AsRef<Path> {
         // TODO rebuild common symbols
     }
 
-    for (section_idx, section) in obj_file.sections().enumerate() {
-        let out_section = match section_indexes[section_idx].and_then(|idx| sections.get_mut(idx)) {
+    for section in obj_file.sections() {
+        let out_section =
+            match section_indexes[section.index().0].and_then(|idx| sections.get_mut(idx)) {
                 Some(s) => s,
                 None => continue,
             };
@@ -396,7 +404,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     }
 
     writer.reserve_null_section_index();
-    let mut out_sections: Vec<OutSection> = Vec::with_capacity(obj.sections.len());
+    let mut out_sections: Vec<OutSection> = Vec::with_capacity(obj.sections.len() as usize);
     for (_, section) in obj.sections.iter() {
         let name = writer.add_section_name(section.name.as_bytes());
         let index = writer.reserve_section_index();
@@ -411,7 +419,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
         });
     }
 
-    let mut rela_names: Vec<String> = vec![Default::default(); obj.sections.len()];
+    let mut rela_names: Vec<String> = vec![Default::default(); obj.sections.len() as usize];
     for (((_, section), out_section), rela_name) in
         obj.sections.iter().zip(&mut out_sections).zip(&mut rela_names)
     {
@@ -444,7 +452,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
         });
 
         // Generate .comment data
-        let mut comment_data = Vec::<u8>::with_capacity(0x2C + obj.symbols.count() * 8);
+        let mut comment_data = Vec::<u8>::with_capacity(0x2C + obj.symbols.count() as usize * 8);
         mw_comment.to_writer_static(&mut comment_data, Endian::Big)?;
         // Null symbol
         CommentSym { align: 0, vis_flags: 0, active_flags: 0 }
@@ -455,7 +463,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     };
 
     // Generate .note.split section
-    let mut split_meta = if let Some(metadata) = &obj.split_meta {
+    let mut split_meta = if let (Some(metadata), Some(_)) = (&obj.split_meta, &obj.mw_comment) {
         // Reserve section
         let name = writer.add_section_name(SPLITMETA_SECTION.as_bytes());
         let index = writer.reserve_section_index();
@@ -480,8 +488,8 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
         None
     };
 
-    let mut out_symbols: Vec<OutSymbol> = Vec::with_capacity(obj.symbols.count());
-    let mut symbol_map = vec![None; obj.symbols.count()];
+    let mut out_symbols: Vec<OutSymbol> = Vec::with_capacity(obj.symbols.count() as usize);
+    let mut symbol_map = vec![None; obj.symbols.count() as usize];
     let mut section_symbol_offset = 0;
     let mut num_local = 0;
 
@@ -527,7 +535,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     // Add section symbols for relocatable objects
     if obj.kind == ObjKind::Relocatable {
         for (section_index, section) in obj.sections.iter() {
-            let out_section_index = out_sections.get(section_index).map(|s| s.index);
+            let out_section_index = out_sections.get(section_index as usize).map(|s| s.index);
             let index = writer.reserve_symbol_index(out_section_index);
             let sym = object::write::elf::Sym {
                 name: None,
@@ -556,19 +564,19 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     for (symbol_index, symbol) in obj
         .symbols
         .iter()
-        .enumerate()
         .filter(|&(_, s)| s.flags.is_local())
-        .chain(obj.symbols.iter().enumerate().filter(|&(_, s)| !s.flags.is_local()))
+        .chain(obj.symbols.iter().filter(|&(_, s)| !s.flags.is_local()))
     {
         if obj.kind == ObjKind::Relocatable && symbol.kind == ObjSymbolKind::Section {
             // We wrote section symbols above, so skip them here
             let section_index =
                 symbol.section.ok_or_else(|| anyhow!("section symbol without section index"))?;
-            symbol_map[symbol_index] = Some(section_symbol_offset + section_index as u32);
+            symbol_map[symbol_index as usize] =
+                Some(section_symbol_offset as ObjSectionIndex + section_index);
             continue;
         }
 
-        let section = symbol.section.and_then(|idx| out_sections.get(idx));
+        let section = symbol.section.and_then(|idx| out_sections.get(idx as usize));
         let section_index = section.map(|s| s.index);
         let index = writer.reserve_symbol_index(section_index);
         let name_index = if symbol.name.is_empty() {
@@ -612,7 +620,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
             num_local = writer.symbol_count();
         }
         out_symbols.push(OutSymbol { index, sym });
-        symbol_map[symbol_index] = Some(index.0);
+        symbol_map[symbol_index as usize] = Some(index.0);
         if let Some((comment_data, _)) = &mut comment_data {
             CommentSym::from(symbol, export_all).to_writer_static(comment_data, Endian::Big)?;
         }
@@ -630,7 +638,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     writer.reserve_file_header();
 
     if obj.kind == ObjKind::Executable {
-        writer.reserve_program_headers(obj.sections.len() as u32);
+        writer.reserve_program_headers(obj.sections.len());
     }
 
     for ((_, section), out_section) in obj.sections.iter().zip(&mut out_sections) {
@@ -729,7 +737,7 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
         ensure!(writer.len() == out_section.rela_offset);
         for (addr, reloc) in section.relocations.iter() {
             let (r_offset, r_type) = reloc.to_elf(addr);
-            let r_sym = symbol_map[reloc.target_symbol]
+            let r_sym = symbol_map[reloc.target_symbol as usize]
                 .ok_or_else(|| anyhow!("Relocation against stripped symbol"))?;
             writer.write_relocation(true, &Rel { r_offset, r_sym, r_type, r_addend: reloc.addend });
         }
@@ -824,9 +832,16 @@ pub fn write_elf(obj: &ObjInfo, export_all: bool) -> Result<Vec<u8>> {
     // Write .note.split section header
     if let Some((metadata, idx)) = &split_meta {
         let out_section = &out_sections[*idx];
+        let mut sh_type = SHT_SPLITMETA;
+        if matches!(&obj.mw_comment, Some(comment) if comment.version < 14) {
+            // Prior to mwld GC 3.0a3, the linker doesn't support ELF .note sections
+            // properly. With GC 2.7, it crashes if the section type is SHT_NOTE.
+            // Use the same section type as .mwcats.* so the linker ignores it.
+            sh_type = SHT_MWCATS;
+        }
         writer.write_section_header(&SectionHeader {
             name: Some(out_section.name),
-            sh_type: SHT_SPLITMETA,
+            sh_type,
             sh_flags: 0,
             sh_addr: 0,
             sh_offset: out_section.offset as u64,
@@ -881,7 +896,7 @@ fn to_obj_symbol(
         name: name.to_string(),
         demangled_name: demangle(name, &Default::default()),
         address: symbol.address(),
-        section: section_idx,
+        section: section_idx.map(|s| s as ObjSectionIndex),
         size: symbol.size(),
         size_known: true,
         flags,
@@ -915,7 +930,7 @@ pub fn to_obj_reloc_kind(flags: RelocationFlags) -> Result<ObjRelocKind> {
 
 fn to_obj_reloc(
     obj_file: &object::File<'_>,
-    symbol_indexes: &[Option<usize>],
+    symbol_indexes: &[Option<ObjSymbolIndex>],
     section_data: &[u8],
     address: u64,
     reloc: Relocation,

src/util/file.rs

@@ -1,234 +1,48 @@
 use std::{
-    ffi::OsStr,
+    fs,
     fs::{DirBuilder, File, OpenOptions},
-    io::{BufRead, BufReader, BufWriter, Cursor, Read, Seek, SeekFrom},
-    path::{Component, Path, PathBuf},
+    io,
+    io::{BufRead, BufWriter, Read, Seek, SeekFrom, Write},
 };
 
-use anyhow::{anyhow, bail, Context, Result};
+use anyhow::{anyhow, Context, Result};
 use filetime::{set_file_mtime, FileTime};
-use memmap2::{Mmap, MmapOptions};
-use path_slash::PathBufExt;
-use rarc::RarcReader;
 use sha1::{Digest, Sha1};
+use typed_path::{Utf8NativePath, Utf8NativePathBuf, Utf8UnixPathBuf};
 use xxhash_rust::xxh3::xxh3_64;
 
 use crate::{
     array_ref,
     util::{
         ncompress::{decompress_yay0, decompress_yaz0, YAY0_MAGIC, YAZ0_MAGIC},
-        rarc,
-        rarc::{Node, RARC_MAGIC},
-        take_seek::{TakeSeek, TakeSeekExt},
-        u8_arc::{U8View, U8_MAGIC},
+        path::check_path_buf,
         Bytes,
     },
+    vfs::{open_file, VfsFile},
 };
 
-pub struct MappedFile {
-    mmap: Mmap,
-    mtime: FileTime,
-    offset: u64,
-    len: u64,
-}
-
-impl MappedFile {
-    pub fn as_reader(&self) -> Cursor<&[u8]> { Cursor::new(self.as_slice()) }
-
-    pub fn as_slice(&self) -> &[u8] {
-        &self.mmap[self.offset as usize..self.offset as usize + self.len as usize]
-    }
-
-    pub fn len(&self) -> u64 { self.len }
-
-    pub fn is_empty(&self) -> bool { self.len == 0 }
-
-    pub fn into_inner(self) -> Mmap { self.mmap }
-}
-
-pub fn split_path<P>(path: P) -> Result<(PathBuf, Option<PathBuf>)>
-where P: AsRef<Path> {
-    let mut base_path = PathBuf::new();
-    let mut sub_path: Option<PathBuf> = None;
-    for component in path.as_ref().components() {
-        if let Component::Normal(str) = component {
-            let str = str.to_str().ok_or(anyhow!("Path is not valid UTF-8"))?;
-            if let Some((a, b)) = str.split_once(':') {
-                base_path.push(a);
-                sub_path = Some(PathBuf::from(b));
-                continue;
-            }
-        }
-        if let Some(sub_path) = &mut sub_path {
-            sub_path.push(component);
-        } else {
-            base_path.push(component);
-        }
-    }
-    Ok((base_path, sub_path))
-}
-
-/// Opens a memory mapped file, and decompresses it if needed.
-pub fn map_file<P>(path: P) -> Result<FileEntry>
-where P: AsRef<Path> {
-    let (base_path, sub_path) = split_path(path.as_ref())?;
-    let file = File::open(&base_path)
-        .with_context(|| format!("Failed to open file '{}'", base_path.display()))?;
-    let mtime = FileTime::from_last_modification_time(&file.metadata()?);
-    let mmap = unsafe { MmapOptions::new().map(&file) }
-        .with_context(|| format!("Failed to mmap file: '{}'", base_path.display()))?;
-    let (offset, len) = if let Some(sub_path) = sub_path {
-        if sub_path.as_os_str() == OsStr::new("nlzss") {
-            return Ok(FileEntry::Buffer(
-                nintendo_lz::decompress(&mut mmap.as_ref())
-                    .map_err(|e| {
-                        anyhow!(
-                            "Failed to decompress '{}' with NLZSS: {}",
-                            path.as_ref().display(),
-                            e
-                        )
-                    })?
-                    .into_boxed_slice(),
-                mtime,
-            ));
-        } else if sub_path.as_os_str() == OsStr::new("yaz0") {
-            return Ok(FileEntry::Buffer(
-                decompress_yaz0(mmap.as_ref()).with_context(|| {
-                    format!("Failed to decompress '{}' with Yaz0", path.as_ref().display())
-                })?,
-                mtime,
-            ));
-        } else if sub_path.as_os_str() == OsStr::new("yay0") {
-            return Ok(FileEntry::Buffer(
-                decompress_yay0(mmap.as_ref()).with_context(|| {
-                    format!("Failed to decompress '{}' with Yay0", path.as_ref().display())
-                })?,
-                mtime,
-            ));
-        }
-
-        let buf = mmap.as_ref();
-        match *array_ref!(buf, 0, 4) {
-            RARC_MAGIC => {
-                let rarc = RarcReader::new(&mut Cursor::new(mmap.as_ref())).with_context(|| {
-                    format!("Failed to open '{}' as RARC archive", base_path.display())
-                })?;
-                let (offset, size) = rarc.find_file(&sub_path)?.ok_or_else(|| {
-                    anyhow!("File '{}' not found in '{}'", sub_path.display(), base_path.display())
-                })?;
-                (offset, size as u64)
-            }
-            U8_MAGIC => {
-                let arc = U8View::new(buf).map_err(|e| {
-                    anyhow!("Failed to open '{}' as U8 archive: {}", base_path.display(), e)
-                })?;
-                let (_, node) = arc.find(sub_path.to_slash_lossy().as_ref()).ok_or_else(|| {
-                    anyhow!("File '{}' not found in '{}'", sub_path.display(), base_path.display())
-                })?;
-                (node.offset() as u64, node.length() as u64)
-            }
-            _ => bail!("Couldn't detect archive type for '{}'", path.as_ref().display()),
-        }
-    } else {
-        (0, mmap.len() as u64)
-    };
-    let map = MappedFile { mmap, mtime, offset, len };
-    let buf = map.as_slice();
-    // Auto-detect compression if there's a magic number.
-    if buf.len() > 4 {
-        match *array_ref!(buf, 0, 4) {
-            YAZ0_MAGIC => {
-                return Ok(FileEntry::Buffer(
-                    decompress_yaz0(buf).with_context(|| {
-                        format!("Failed to decompress '{}' with Yaz0", path.as_ref().display())
-                    })?,
-                    mtime,
-                ));
-            }
-            YAY0_MAGIC => {
-                return Ok(FileEntry::Buffer(
-                    decompress_yay0(buf).with_context(|| {
-                        format!("Failed to decompress '{}' with Yay0", path.as_ref().display())
-                    })?,
-                    mtime,
-                ));
-            }
-            _ => {}
-        }
-    }
-    Ok(FileEntry::MappedFile(map))
-}
-
-/// Opens a memory mapped file without decompression or archive handling.
-pub fn map_file_basic<P>(path: P) -> Result<FileEntry>
-where P: AsRef<Path> {
-    let path = path.as_ref();
-    let file =
-        File::open(path).with_context(|| format!("Failed to open file '{}'", path.display()))?;
-    let mtime = FileTime::from_last_modification_time(&file.metadata()?);
-    let mmap = unsafe { MmapOptions::new().map(&file) }
-        .with_context(|| format!("Failed to mmap file: '{}'", path.display()))?;
-    let len = mmap.len() as u64;
-    Ok(FileEntry::MappedFile(MappedFile { mmap, mtime, offset: 0, len }))
-}
-
-pub type OpenedFile = TakeSeek<File>;
-
-/// Opens a file (not memory mapped). No decompression is performed.
-pub fn open_file<P>(path: P) -> Result<OpenedFile>
-where P: AsRef<Path> {
-    let (base_path, sub_path) = split_path(path)?;
-    let mut file = File::open(&base_path)
-        .with_context(|| format!("Failed to open file '{}'", base_path.display()))?;
-    let (offset, size) = if let Some(sub_path) = sub_path {
-        let rarc = RarcReader::new(&mut BufReader::new(&file))
-            .with_context(|| format!("Failed to read RARC '{}'", base_path.display()))?;
-        rarc.find_file(&sub_path)?.map(|(o, s)| (o, s as u64)).ok_or_else(|| {
-            anyhow!("File '{}' not found in '{}'", sub_path.display(), base_path.display())
-        })?
-    } else {
-        (0, file.seek(SeekFrom::End(0))?)
-    };
-    file.seek(SeekFrom::Start(offset))?;
-    Ok(file.take_seek(size))
-}
-
-pub trait Reader: BufRead + Seek {}
-
-impl Reader for Cursor<&[u8]> {}
-
-/// Creates a buffered reader around a file (not memory mapped).
-pub fn buf_reader<P>(path: P) -> Result<BufReader<File>>
-where P: AsRef<Path> {
-    let file = File::open(&path)
-        .with_context(|| format!("Failed to open file '{}'", path.as_ref().display()))?;
-    Ok(BufReader::new(file))
-}
-
 /// Creates a buffered writer around a file (not memory mapped).
-pub fn buf_writer<P>(path: P) -> Result<BufWriter<File>>
-where P: AsRef<Path> {
-    if let Some(parent) = path.as_ref().parent() {
+pub fn buf_writer(path: &Utf8NativePath) -> Result<BufWriter<File>> {
+    if let Some(parent) = path.parent() {
         DirBuilder::new().recursive(true).create(parent)?;
     }
-    let file = File::create(&path)
-        .with_context(|| format!("Failed to create file '{}'", path.as_ref().display()))?;
+    let file = File::create(path).with_context(|| format!("Failed to create file '{}'", path))?;
     Ok(BufWriter::new(file))
 }
 
 /// Reads a string with known size at the specified offset.
-pub fn read_string<R>(reader: &mut R, off: u64, size: usize) -> Result<String>
+pub fn read_string<R>(reader: &mut R, off: u64, size: usize) -> io::Result<String>
 where R: Read + Seek + ?Sized {
     let mut data = vec![0u8; size];
     let pos = reader.stream_position()?;
     reader.seek(SeekFrom::Start(off))?;
     reader.read_exact(&mut data)?;
     reader.seek(SeekFrom::Start(pos))?;
-    Ok(String::from_utf8(data)?)
+    String::from_utf8(data).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
 }
 
 /// Reads a zero-terminated string at the specified offset.
-pub fn read_c_string<R>(reader: &mut R, off: u64) -> Result<String>
+pub fn read_c_string<R>(reader: &mut R, off: u64) -> io::Result<String>
 where R: Read + Seek + ?Sized {
     let pos = reader.stream_position()?;
     reader.seek(SeekFrom::Start(off))?;
@@ -246,22 +60,21 @@ where R: Read + Seek + ?Sized {
 }
 
 /// Process response files (starting with '@') and glob patterns (*).
-pub fn process_rsp(files: &[PathBuf]) -> Result<Vec<PathBuf>> {
-    let mut out = Vec::with_capacity(files.len());
+pub fn process_rsp(files: &[Utf8NativePathBuf]) -> Result<Vec<Utf8NativePathBuf>> {
+    let mut out = Vec::<Utf8NativePathBuf>::with_capacity(files.len());
     for path in files {
-        let path_str =
-            path.to_str().ok_or_else(|| anyhow!("'{}' is not valid UTF-8", path.display()))?;
-        if let Some(rsp_file) = path_str.strip_prefix('@') {
-            let reader = buf_reader(rsp_file)?;
-            for result in reader.lines() {
+        if let Some(rsp_file) = path.as_str().strip_prefix('@') {
+            let file = open_file(Utf8NativePath::new(rsp_file), true)?;
+            for result in file.lines() {
                 let line = result?;
                 if !line.is_empty() {
-                    out.push(PathBuf::from_slash(line));
+                    out.push(Utf8UnixPathBuf::from(line).with_encoding());
                 }
             }
-        } else if path_str.contains('*') {
-            for entry in glob::glob(path_str)? {
-                out.push(entry?);
+        } else if path.as_str().contains('*') {
+            for entry in glob::glob(path.as_str())? {
+                let path = check_path_buf(entry?)?;
+                out.push(path.with_encoding());
             }
         } else {
             out.push(path.clone());
@@ -270,120 +83,20 @@ pub fn process_rsp(files: &[PathBuf]) -> Result<Vec<PathBuf>> {
     Ok(out)
 }
 
-/// Iterator over files in a RARC archive.
-struct RarcIterator {
-    file: MappedFile,
-    base_path: PathBuf,
-    paths: Vec<(PathBuf, u64, u32)>,
-    index: usize,
-}
-
-impl RarcIterator {
-    pub fn new(file: MappedFile, base_path: &Path) -> Result<Self> {
-        let reader = RarcReader::new(&mut file.as_reader())?;
-        let paths = Self::collect_paths(&reader, base_path);
-        Ok(Self { file, base_path: base_path.to_owned(), paths, index: 0 })
-    }
-
-    fn collect_paths(reader: &RarcReader, base_path: &Path) -> Vec<(PathBuf, u64, u32)> {
-        let mut current_path = PathBuf::new();
-        let mut paths = vec![];
-        for node in reader.nodes() {
-            match node {
-                Node::DirectoryBegin { name } => {
-                    current_path.push(name.name);
-                }
-                Node::DirectoryEnd { name: _ } => {
-                    current_path.pop();
-                }
-                Node::File { name, offset, size } => {
-                    let path = base_path.join(&current_path).join(name.name);
-                    paths.push((path, offset, size));
-                }
-                Node::CurrentDirectory => {}
-                Node::ParentDirectory => {}
-            }
-        }
-        paths
-    }
-}
-
-impl Iterator for RarcIterator {
-    type Item = Result<(PathBuf, Box<[u8]>)>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.index >= self.paths.len() {
-            return None;
-        }
-
-        let (path, off, size) = self.paths[self.index].clone();
-        self.index += 1;
-
-        let slice = &self.file.as_slice()[off as usize..off as usize + size as usize];
-        match decompress_if_needed(slice) {
-            Ok(buf) => Some(Ok((path, buf.into_owned()))),
-            Err(e) => Some(Err(e)),
-        }
-    }
-}
-
-/// A file entry, either a memory mapped file or an owned buffer.
-pub enum FileEntry {
-    MappedFile(MappedFile),
-    Buffer(Box<[u8]>, FileTime),
-}
-
-impl FileEntry {
-    /// Creates a reader for the file.
-    pub fn as_reader(&self) -> Cursor<&[u8]> {
-        match self {
-            Self::MappedFile(file) => file.as_reader(),
-            Self::Buffer(slice, _) => Cursor::new(slice),
-        }
-    }
-
-    pub fn as_slice(&self) -> &[u8] {
-        match self {
-            Self::MappedFile(file) => file.as_slice(),
-            Self::Buffer(slice, _) => slice,
-        }
-    }
-
-    pub fn len(&self) -> u64 {
-        match self {
-            Self::MappedFile(file) => file.len(),
-            Self::Buffer(slice, _) => slice.len() as u64,
-        }
-    }
-
-    pub fn is_empty(&self) -> bool {
-        match self {
-            Self::MappedFile(file) => file.is_empty(),
-            Self::Buffer(slice, _) => slice.is_empty(),
-        }
-    }
-
-    pub fn mtime(&self) -> FileTime {
-        match self {
-            Self::MappedFile(file) => file.mtime,
-            Self::Buffer(_, mtime) => *mtime,
-        }
-    }
-}
-
 /// Information about a file when it was read.
 /// Used to determine if a file has changed since it was read (mtime)
 /// and if it needs to be written (hash).
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct FileReadInfo {
-    pub mtime: FileTime,
+    pub mtime: Option<FileTime>,
     pub hash: u64,
 }
 
 impl FileReadInfo {
-    pub fn new(entry: &FileEntry) -> Result<Self> {
-        let hash = xxh3_64(entry.as_slice());
-        Ok(Self { mtime: entry.mtime(), hash })
+    pub fn new(entry: &mut dyn VfsFile) -> Result<Self> {
+        let hash = xxh3_64(entry.map()?);
+        let metadata = entry.metadata()?;
+        Ok(Self { mtime: metadata.mtime, hash })
     }
 }
 
@@ -391,108 +104,37 @@ impl FileReadInfo {
 /// If a file is a RARC archive, iterate over its contents.
 /// If a file is a Yaz0 compressed file, decompress it.
 pub struct FileIterator {
-    paths: Vec<PathBuf>,
+    paths: Vec<Utf8NativePathBuf>,
     index: usize,
-    rarc: Option<RarcIterator>,
 }
 
 impl FileIterator {
-    pub fn new(paths: &[PathBuf]) -> Result<Self> {
-        Ok(Self { paths: process_rsp(paths)?, index: 0, rarc: None })
+    pub fn new(paths: &[Utf8NativePathBuf]) -> Result<Self> {
+        Ok(Self { paths: process_rsp(paths)?, index: 0 })
     }
 
-    fn next_rarc(&mut self) -> Option<Result<(PathBuf, FileEntry)>> {
-        if let Some(rarc) = &mut self.rarc {
-            match rarc.next() {
-                Some(Ok((path, buf))) => {
-                    let mut path_str = rarc.base_path.as_os_str().to_os_string();
-                    path_str.push(OsStr::new(":"));
-                    path_str.push(path.as_os_str());
-                    return Some(Ok((path, FileEntry::Buffer(buf, rarc.file.mtime))));
-                }
-                Some(Err(err)) => return Some(Err(err)),
-                None => self.rarc = None,
-            }
-        }
-        None
-    }
-
-    fn next_path(&mut self) -> Option<Result<(PathBuf, FileEntry)>> {
+    fn next_path(&mut self) -> Option<Result<(Utf8NativePathBuf, Box<dyn VfsFile>)>> {
         if self.index >= self.paths.len() {
             return None;
         }
 
         let path = self.paths[self.index].clone();
         self.index += 1;
-        match map_file(&path) {
-            Ok(FileEntry::MappedFile(map)) => self.handle_file(map, path),
-            Ok(FileEntry::Buffer(_, _)) => todo!(),
-            Err(err) => Some(Err(err)),
+        match open_file(&path, true) {
+            Ok(file) => Some(Ok((path, file))),
+            Err(e) => Some(Err(e)),
         }
     }
-
-    fn handle_file(
-        &mut self,
-        file: MappedFile,
-        path: PathBuf,
-    ) -> Option<Result<(PathBuf, FileEntry)>> {
-        let buf = file.as_slice();
-        if buf.len() <= 4 {
-            return Some(Ok((path, FileEntry::MappedFile(file))));
-        }
-
-        match *array_ref!(buf, 0, 4) {
-            YAZ0_MAGIC => self.handle_yaz0(file, path),
-            YAY0_MAGIC => self.handle_yay0(file, path),
-            RARC_MAGIC => self.handle_rarc(file, path),
-            _ => Some(Ok((path, FileEntry::MappedFile(file)))),
-        }
-    }
-
-    fn handle_yaz0(
-        &mut self,
-        file: MappedFile,
-        path: PathBuf,
-    ) -> Option<Result<(PathBuf, FileEntry)>> {
-        Some(match decompress_yaz0(file.as_slice()) {
-            Ok(buf) => Ok((path, FileEntry::Buffer(buf, file.mtime))),
-            Err(e) => Err(e),
-        })
-    }
-
-    fn handle_yay0(
-        &mut self,
-        file: MappedFile,
-        path: PathBuf,
-    ) -> Option<Result<(PathBuf, FileEntry)>> {
-        Some(match decompress_yay0(file.as_slice()) {
-            Ok(buf) => Ok((path, FileEntry::Buffer(buf, file.mtime))),
-            Err(e) => Err(e),
-        })
-    }
-
-    fn handle_rarc(
-        &mut self,
-        file: MappedFile,
-        path: PathBuf,
-    ) -> Option<Result<(PathBuf, FileEntry)>> {
-        self.rarc = match RarcIterator::new(file, &path) {
-            Ok(iter) => Some(iter),
-            Err(e) => return Some(Err(e)),
-        };
-        self.next()
-    }
 }
 
 impl Iterator for FileIterator {
-    type Item = Result<(PathBuf, FileEntry)>;
+    type Item = Result<(Utf8NativePathBuf, Box<dyn VfsFile>)>;
 
-    fn next(&mut self) -> Option<Self::Item> { self.next_rarc().or_else(|| self.next_path()) }
+    fn next(&mut self) -> Option<Self::Item> { self.next_path() }
 }
 
-pub fn touch<P>(path: P) -> std::io::Result<()>
-where P: AsRef<Path> {
-    if path.as_ref().exists() {
+pub fn touch(path: &Utf8NativePath) -> io::Result<()> {
+    if fs::exists(path)? {
         set_file_mtime(path, FileTime::now())
     } else {
         match OpenOptions::new().create(true).truncate(true).write(true).open(path) {
@@ -514,13 +156,16 @@ pub fn decompress_if_needed(buf: &[u8]) -> Result<Bytes> {
 }
 
 pub fn verify_hash(buf: &[u8], expected_str: &str) -> Result<()> {
+    let mut hasher = Sha1::new();
+    hasher.update(buf);
+    check_hash_str(hasher.finalize().into(), expected_str)
+}
+
+pub fn check_hash_str(hash_bytes: [u8; 20], expected_str: &str) -> Result<()> {
     let mut expected_bytes = [0u8; 20];
     hex::decode_to_slice(expected_str, &mut expected_bytes)
         .with_context(|| format!("Invalid SHA-1 '{expected_str}'"))?;
-    let mut hasher = Sha1::new();
-    hasher.update(buf);
-    let hash_bytes = hasher.finalize();
-    if hash_bytes.as_ref() == expected_bytes {
+    if hash_bytes == expected_bytes {
         Ok(())
     } else {
         Err(anyhow!(
@@ -530,3 +175,44 @@ pub fn verify_hash(buf: &[u8], expected_str: &str) -> Result<()> {
         ))
     }
 }
+
+/// Copies from a buffered reader to a writer without extra allocations.
+pub fn buf_copy<R, W>(reader: &mut R, writer: &mut W) -> io::Result<u64>
+where
+    R: BufRead + ?Sized,
+    W: Write + ?Sized,
+{
+    let mut copied = 0;
+    loop {
+        let buf = reader.fill_buf()?;
+        let len = buf.len();
+        if len == 0 {
+            break;
+        }
+        writer.write_all(buf)?;
+        reader.consume(len);
+        copied += len as u64;
+    }
+    Ok(copied)
+}
+
+/// Copies from a buffered reader to a writer without extra allocations.
+/// Generates an SHA-1 hash of the data as it is copied.
+pub fn buf_copy_with_hash<R, W>(reader: &mut R, writer: &mut W) -> io::Result<[u8; 20]>
+where
+    R: BufRead + ?Sized,
+    W: Write + ?Sized,
+{
+    let mut hasher = Sha1::new();
+    loop {
+        let buf = reader.fill_buf()?;
+        let len = buf.len();
+        if len == 0 {
+            break;
+        }
+        hasher.update(buf);
+        writer.write_all(buf)?;
+        reader.consume(len);
+    }
+    Ok(hasher.finalize().into())
+}

src/util/lcf.rs

@@ -1,8 +1,6 @@
-use std::path::PathBuf;
-
 use anyhow::Result;
 use itertools::Itertools;
-use path_slash::PathBufExt;
+use typed_path::{Utf8NativePathBuf, Utf8UnixPath};
 
 use crate::obj::{ObjInfo, ObjKind};
 
@@ -33,11 +31,11 @@ pub fn generate_ldscript(
     let mut force_files = Vec::with_capacity(obj.link_order.len());
     for unit in &obj.link_order {
         let obj_path = obj_path_for_unit(&unit.name);
-        force_files.push(obj_path.file_name().unwrap().to_str().unwrap().to_string());
+        force_files.push(obj_path.file_name().unwrap().to_string());
     }
 
     let mut force_active = force_active.to_vec();
-    for symbol in obj.symbols.iter() {
+    for (_, symbol) in obj.symbols.iter() {
         if symbol.flags.is_exported() && symbol.flags.is_global() && !symbol.flags.is_no_write() {
             force_active.push(symbol.name.clone());
         }
@@ -82,11 +80,11 @@ pub fn generate_ldscript_partial(
     let mut force_files = Vec::with_capacity(obj.link_order.len());
     for unit in &obj.link_order {
         let obj_path = obj_path_for_unit(&unit.name);
-        force_files.push(obj_path.file_name().unwrap().to_str().unwrap().to_string());
+        force_files.push(obj_path.file_name().unwrap().to_string());
     }
 
     let mut force_active = force_active.to_vec();
-    for symbol in obj.symbols.iter() {
+    for (_, symbol) in obj.symbols.iter() {
         if symbol.flags.is_exported() && symbol.flags.is_global() && !symbol.flags.is_no_write() {
             force_active.push(symbol.name.clone());
         }
@@ -99,6 +97,10 @@ pub fn generate_ldscript_partial(
     Ok(out)
 }
 
-pub fn obj_path_for_unit(unit: &str) -> PathBuf { PathBuf::from_slash(unit).with_extension("o") }
+pub fn obj_path_for_unit(unit: &str) -> Utf8NativePathBuf {
+    Utf8UnixPath::new(unit).with_encoding().with_extension("o")
+}
 
-pub fn asm_path_for_unit(unit: &str) -> PathBuf { PathBuf::from_slash(unit).with_extension("s") }
+pub fn asm_path_for_unit(unit: &str) -> Utf8NativePathBuf {
+    Utf8UnixPath::new(unit).with_encoding().with_extension("s")
+}

src/util/map.rs

@@ -5,23 +5,26 @@ use std::{
     hash::Hash,
     io::BufRead,
     mem::{replace, take},
-    path::Path,
 };
 
 use anyhow::{anyhow, bail, Error, Result};
 use cwdemangle::{demangle, DemangleOptions};
 use flagset::FlagSet;
+use indexmap::IndexMap;
 use itertools::Itertools;
 use multimap::MultiMap;
 use once_cell::sync::Lazy;
 use regex::{Captures, Regex};
+use typed_path::Utf8NativePath;
 
 use crate::{
     obj::{
-        ObjInfo, ObjKind, ObjSplit, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
-        ObjUnit,
+        section_kind_for_section, ObjArchitecture, ObjInfo, ObjKind, ObjSection, ObjSectionKind,
+        ObjSections, ObjSplit, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbols, ObjUnit, SectionIndex,
     },
-    util::{file::map_file, nested::NestedVec},
+    util::nested::NestedVec,
+    vfs::open_file,
 };
 
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
@@ -127,7 +130,7 @@ pub struct MapInfo {
     pub unit_references: MultiMap<SymbolRef, String>,
     pub sections: Vec<SectionInfo>,
     pub link_map_symbols: HashMap<SymbolRef, SymbolEntry>,
-    pub section_symbols: HashMap<String, BTreeMap<u32, Vec<SymbolEntry>>>,
+    pub section_symbols: IndexMap<String, BTreeMap<u32, Vec<SymbolEntry>>>,
     pub section_units: HashMap<String, Vec<(u32, String)>>,
     // For common BSS inflation correction
     pub common_bss_start: Option<u32>,
@@ -711,26 +714,61 @@ where
     Ok(sm.result)
 }
 
-pub fn apply_map_file<P>(
-    path: P,
+pub fn apply_map_file(
+    path: &Utf8NativePath,
     obj: &mut ObjInfo,
     common_bss_start: Option<u32>,
     mw_comment_version: Option<u8>,
-) -> Result<()>
-where
-    P: AsRef<Path>,
-{
-    let file = map_file(&path)?;
-    let info = process_map(&mut file.as_reader(), common_bss_start, mw_comment_version)?;
-    apply_map(&info, obj)
+) -> Result<()> {
+    let mut file = open_file(path, true)?;
+    let info = process_map(file.as_mut(), common_bss_start, mw_comment_version)?;
+    apply_map(info, obj)
 }
 
-pub fn apply_map(result: &MapInfo, obj: &mut ObjInfo) -> Result<()> {
+const DEFAULT_REL_SECTIONS: &[&str] =
+    &[".init", ".text", ".ctors", ".dtors", ".rodata", ".data", ".bss"];
+
+fn normalize_section_name(name: &str) -> &str {
+    match name {
+        ".extabindex" => "extabindex",
+        ".extab" => "extab",
+        _ => name,
+    }
+}
+
+pub fn apply_map(mut result: MapInfo, obj: &mut ObjInfo) -> Result<()> {
+    if result.sections.is_empty() && obj.kind == ObjKind::Executable {
+        log::warn!("Memory map section missing, attempting to recreate");
+        for (section_name, symbol_map) in &result.section_symbols {
+            let mut address = u32::MAX;
+            let mut size = 0;
+            for symbol_entry in symbol_map.values().flatten() {
+                if symbol_entry.address < address {
+                    address = symbol_entry.address;
+                }
+                if symbol_entry.address + symbol_entry.size > address + size {
+                    size = symbol_entry.address + symbol_entry.size - address;
+                }
+            }
+            log::info!("Recreated section {} @ {:#010X} ({:#X})", section_name, address, size);
+            result.sections.push(SectionInfo {
+                name: normalize_section_name(section_name).to_string(),
+                address,
+                size,
+                file_offset: 0,
+            });
+        }
+    }
+
     for (section_index, section) in obj.sections.iter_mut() {
         let opt = if obj.kind == ObjKind::Executable {
-            result.sections.iter().find(|s| s.address == section.address as u32)
+            result.sections.iter().find(|s| {
+                // Slightly fuzzy match for postprocess/broken maps (TP, SMG)
+                s.address >= section.address as u32
+                    && (s.address + s.size) <= (section.address + section.size) as u32
+            })
         } else {
-            result.sections.iter().filter(|s| s.size > 0).nth(section_index)
+            result.sections.iter().filter(|s| s.size > 0).nth(section_index as usize)
         };
         if let Some(info) = opt {
             if section.section_known && section.name != info.name {
@@ -753,8 +791,171 @@ pub fn apply_map(result: &MapInfo, obj: &mut ObjInfo) -> Result<()> {
             section.rename(info.name.clone())?;
         } else {
             log::warn!("Section {} @ {:#010X} not found in map", section.name, section.address);
+            if obj.kind == ObjKind::Relocatable {
+                let new_name = match section.kind {
+                    ObjSectionKind::Code => {
+                        if section.elf_index == 0 {
+                            ".init"
+                        } else {
+                            ".text"
                         }
                     }
+                    ObjSectionKind::Data | ObjSectionKind::ReadOnlyData => {
+                        if section.elf_index == 4 {
+                            if result
+                                .section_symbols
+                                .get(".rodata")
+                                .map_or(false, |m| !m.is_empty())
+                            {
+                                ".rodata"
+                            } else {
+                                ".data"
+                            }
+                        } else if let Some(section_name) =
+                            DEFAULT_REL_SECTIONS.get(section.elf_index as usize)
+                        {
+                            section_name
+                        } else {
+                            ".data"
+                        }
+                    }
+                    ObjSectionKind::Bss => ".bss",
+                };
+                log::warn!("Defaulting to {}", new_name);
+                section.rename(new_name.to_string())?;
+            }
+        }
+    }
+
+    // If every symbol the map has alignment 4, it's likely bogus
+    let bogus_alignment =
+        result.section_symbols.values().flatten().flat_map(|(_, m)| m).all(|s| s.align == Some(4));
+    if bogus_alignment {
+        log::warn!("Bogus alignment detected, ignoring");
+    }
+
+    // Add section symbols
+    for (section_name, symbol_map) in &result.section_symbols {
+        if section_name == ".dead" {
+            continue;
+        }
+        let section_name = normalize_section_name(section_name);
+        let (section_index, _) = obj
+            .sections
+            .by_name(section_name)?
+            .ok_or_else(|| anyhow!("Failed to locate section {section_name} from map"))?;
+        for symbol_entry in symbol_map.values().flatten() {
+            add_symbol(obj, symbol_entry, Some(section_index), bogus_alignment)?;
+        }
+    }
+
+    // Add absolute symbols
+    // TODO
+    // for symbol_entry in result.link_map_symbols.values().filter(|s| s.unit.is_none()) {
+    //     add_symbol(obj, symbol_entry, None)?;
+    // }
+
+    // Add splits
+    for (section_name, unit_order) in &result.section_units {
+        if section_name == ".dead" {
+            continue;
+        }
+        let section_name = normalize_section_name(section_name);
+        let (_, section) = obj
+            .sections
+            .iter_mut()
+            .find(|(_, s)| s.name == *section_name)
+            .ok_or_else(|| anyhow!("Failed to locate section '{}'", section_name))?;
+        let mut iter = unit_order.iter().peekable();
+        while let Some((addr, unit)) = iter.next() {
+            let next = iter
+                .peek()
+                .map(|(addr, _)| *addr)
+                .unwrap_or_else(|| (section.address + section.size) as u32);
+            let common = section_name == ".bss"
+                && matches!(result.common_bss_start, Some(start) if *addr >= start);
+            let unit = unit.replace(' ', "/");
+
+            // Disable mw_comment_version for assembly units
+            if unit.ends_with(".s") && !obj.link_order.iter().any(|u| u.name == unit) {
+                obj.link_order.push(ObjUnit {
+                    name: unit.clone(),
+                    autogenerated: false,
+                    comment_version: Some(0),
+                    order: None,
+                });
+            }
+
+            section.splits.push(*addr, ObjSplit {
+                unit,
+                end: next,
+                align: None,
+                common,
+                autogenerated: false,
+                skip: false,
+                rename: None,
+            });
+        }
+    }
+    Ok(())
+}
+
+pub fn create_obj(result: &MapInfo) -> Result<ObjInfo> {
+    let sections = result
+        .sections
+        .iter()
+        .map(|s| {
+            let name = s.name.clone();
+            let address = s.address as u64;
+            let size = s.size as u64;
+            let file_offset = s.file_offset as u64;
+            let kind = section_kind_for_section(&name).unwrap_or(ObjSectionKind::ReadOnlyData);
+            ObjSection {
+                name,
+                kind,
+                address,
+                size,
+                data: vec![],
+                align: 0,
+                elf_index: 0,
+                relocations: Default::default(),
+                virtual_address: None,
+                file_offset,
+                section_known: true,
+                splits: Default::default(),
+            }
+        })
+        .collect();
+    let mut obj = ObjInfo {
+        kind: ObjKind::Executable,
+        architecture: ObjArchitecture::PowerPc,
+        name: "".to_string(),
+        symbols: ObjSymbols::new(ObjKind::Executable, vec![]),
+        sections: ObjSections::new(ObjKind::Executable, sections),
+        entry: None, // TODO result.entry_point
+        mw_comment: None,
+        split_meta: None,
+        sda2_base: None,
+        sda_base: None,
+        stack_address: None,
+        stack_end: None,
+        db_stack_addr: None,
+        arena_lo: None,
+        arena_hi: None,
+        link_order: vec![],
+        blocked_relocation_sources: Default::default(),
+        blocked_relocation_targets: Default::default(),
+        known_functions: Default::default(),
+        module_id: 0,
+        unresolved_relocations: vec![],
+    };
+
+    // If every symbol the map has alignment 4, it's likely bogus
+    let bogus_alignment =
+        result.section_symbols.values().flatten().flat_map(|(_, m)| m).all(|s| s.align == Some(4));
+    if bogus_alignment {
+        log::warn!("Bogus alignment detected, ignoring");
+    }
 
     // Add section symbols
     for (section_name, symbol_map) in &result.section_symbols {
@@ -763,16 +964,10 @@ pub fn apply_map(result: &MapInfo, obj: &mut ObjInfo) -> Result<()> {
             .by_name(section_name)?
             .ok_or_else(|| anyhow!("Failed to locate section {section_name} from map"))?;
         for symbol_entry in symbol_map.values().flatten() {
-            add_symbol(obj, symbol_entry, Some(section_index))?;
+            add_symbol(&mut obj, symbol_entry, Some(section_index), bogus_alignment)?;
         }
     }
 
-    // Add absolute symbols
-    // TODO
-    // for symbol_entry in result.link_map_symbols.values().filter(|s| s.unit.is_none()) {
-    //     add_symbol(obj, symbol_entry, None)?;
-    // }
-
     // Add splits
     for (section_name, unit_order) in &result.section_units {
         let (_, section) = obj
@@ -796,6 +991,7 @@ pub fn apply_map(result: &MapInfo, obj: &mut ObjInfo) -> Result<()> {
                     name: unit.clone(),
                     autogenerated: false,
                     comment_version: Some(0),
+                    order: None,
                 });
             }
 
@@ -810,10 +1006,15 @@ pub fn apply_map(result: &MapInfo, obj: &mut ObjInfo) -> Result<()> {
             });
         }
     }
-    Ok(())
+    Ok(obj)
 }
 
-fn add_symbol(obj: &mut ObjInfo, symbol_entry: &SymbolEntry, section: Option<usize>) -> Result<()> {
+fn add_symbol(
+    obj: &mut ObjInfo,
+    symbol_entry: &SymbolEntry,
+    section: Option<SectionIndex>,
+    ignore_alignment: bool,
+) -> Result<()> {
     let demangled_name = demangle(&symbol_entry.name, &DemangleOptions::default());
     let mut flags: FlagSet<ObjSymbolFlags> = match symbol_entry.visibility {
         SymbolVisibility::Unknown => Default::default(),
@@ -843,7 +1044,7 @@ fn add_symbol(obj: &mut ObjInfo, symbol_entry: &SymbolEntry, section: Option<usi
                 SymbolKind::Section => ObjSymbolKind::Section,
                 SymbolKind::NoType => ObjSymbolKind::Unknown,
             },
-            align: symbol_entry.align,
+            align: if ignore_alignment { None } else { symbol_entry.align },
             ..Default::default()
         },
         true,

src/util/mod.rs

@@ -15,6 +15,8 @@ pub mod lcf;
 pub mod map;
 pub mod ncompress;
 pub mod nested;
+pub mod nlzss;
+pub mod path;
 pub mod rarc;
 pub mod reader;
 pub mod rel;

src/util/nlzss.rs

@@ -0,0 +1,305 @@
+// BSD 2-Clause License
+//
+// Copyright (c) 2018, Charlotte D
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice, this
+//   list of conditions and the following disclaimer.
+//
+// * Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Source: https://gitlab.com/DarkKirb/nintendo-lz
+// Modified to compile with latest edition, use anyhow::Error, and fix various issues.
+
+use std::io::{Cursor, Read, Write};
+
+use anyhow::{bail, ensure, Result};
+use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
+
+/// Decompresses an LZ10/LZ11 compressed file. It returns an error when:
+///
+/// - The file is not a valid LZ10/LZ11 file
+/// - The file is truncated (More data was expected than present)
+///
+/// # Example
+///
+/// ```rust,ignore
+/// let mut f = File::open("Archive.bin.cmp");
+/// let mut decompressed = nintendo_lz::decompress(&mut f).unwrap();
+/// ```
+pub fn decompress<R>(inp: &mut R) -> Result<Vec<u8>>
+where R: Read + ?Sized {
+    let mut length = inp.read_u32::<LittleEndian>()? as usize;
+    let ver = match length & 0xFF {
+        0x10 => 0,
+        0x11 => 1,
+        _ => bail!("Invalid magic number"),
+    };
+    length >>= 8;
+    if length == 0 && ver == 1 {
+        length = inp.read_u32::<LittleEndian>()? as usize;
+    }
+    let mut out = Vec::<u8>::with_capacity(length);
+    while out.len() < length {
+        let byte = inp.read_u8()?;
+        for bit_no in (0..8).rev() {
+            if out.len() >= length {
+                break;
+            }
+            if ((byte >> bit_no) & 1) == 0 {
+                let data = inp.read_u8()?;
+                out.push(data);
+            } else {
+                let lenmsb = inp.read_u8()? as usize;
+                let lsb = inp.read_u8()? as usize;
+                let mut length: usize = lenmsb >> 4;
+                let mut disp: usize = ((lenmsb & 15) << 8) + lsb;
+                if ver == 0 {
+                    length += 3;
+                } else if length > 1 {
+                    length += 1;
+                } else if length == 0 {
+                    length = (lenmsb & 15) << 4;
+                    length += lsb >> 4;
+                    length += 0x11;
+                    let msb = inp.read_u8()? as usize;
+                    disp = ((lsb & 15) << 8) + msb;
+                } else {
+                    length = (lenmsb & 15) << 12;
+                    length += lsb << 4;
+                    let byte1 = inp.read_u8()? as usize;
+                    let byte2 = inp.read_u8()? as usize;
+                    length += byte1 >> 4;
+                    length += 0x111;
+                    disp = ((byte1 & 15) << 8) + byte2;
+                }
+                let start: usize = out.len() - disp - 1;
+
+                for i in 0..length {
+                    let val = out[start + i];
+                    out.push(val);
+                }
+            }
+        }
+    }
+    Ok(out)
+}
+
+/// This function is a convenience wrapper around `decompress` for decompressing slices, arrays or
+/// vectors.
+pub fn decompress_arr(input: &[u8]) -> Result<Vec<u8>> {
+    let mut reader = Cursor::new(input);
+    decompress(&mut reader)
+}
+
+/// This enum contains the possible compression levels for LZ compression.
+pub enum CompressionLevel {
+    /// LZ10 compression. Maximum repeat size: 18 bytes
+    LZ10,
+    /// LZ11 compression. Maximum repeat size: 65809 bytes
+    ///
+    /// Argument: Maximum repeat size (0..65810), lower means worse compression but higher speed.
+    /// for values < 3 compression is disabled
+    LZ11(u32),
+}
+
+fn find_longest_match(data: &[u8], off: usize, max: usize) -> Option<(usize, usize)> {
+    if off < 4 || data.len() - off < 4 {
+        return None;
+    }
+    let mut longest_pos: usize = 0;
+    let mut longest_len: usize = 0;
+    let mut start = 0;
+    if off > 0x1000 {
+        start = off - 0x1000;
+    }
+    for pos in search(&data[start..off + 2], &data[off..off + 3]) {
+        let mut length = 0;
+        for (i, p) in (off..data.len()).enumerate() {
+            if length == max {
+                return Some((start + pos, length));
+            }
+            if data[p] != data[start + pos + i] {
+                break;
+            }
+            length += 1;
+        }
+        if length > longest_len {
+            longest_pos = pos;
+            longest_len = length;
+        }
+    }
+    if longest_len < 3 {
+        return None;
+    }
+    Some((start + longest_pos, longest_len))
+}
+
+/// Compresses data to LZ10/LZ11. It returns an error when:
+///
+/// - The input is too large for the selected LZ version (LZ10 supports at most 16MiB)
+/// - The maximum repeat length is out of range (for LZ11, has to be in the range (0..65810)
+/// - Writing to the output file failed
+///
+/// # Example
+///
+/// ```rust,ignore
+/// let mut f = File::create("Archive.bin.cmp");
+/// let data = b"This is an example text. This is an example text";
+/// nintendo_lz::compress(&data, &mut f, nintendo_lz::CompressionLevel::LZ11(65809)).unwrap();
+/// ```
+pub fn compress<W>(inp: &[u8], out: &mut W, level: CompressionLevel) -> Result<()>
+where W: Write + ?Sized {
+    let ver = match level {
+        CompressionLevel::LZ10 => 0,
+        CompressionLevel::LZ11(_) => 1,
+    };
+    if ver == 0 && inp.len() > 16777216 {
+        bail!("Input data too large for LZ10");
+    }
+    if ver == 1 && inp.len() as u64 > 0xFFFFFFFF {
+        bail!("Input data too large for LZ11");
+    }
+    let repeat_size = match level {
+        CompressionLevel::LZ10 => 18,
+        CompressionLevel::LZ11(max) => max,
+    };
+    ensure!(repeat_size < 65810, "Maximum repeat size out of range. (0..65810)");
+
+    let size: usize = inp.len();
+
+    if size < 16777216 && (size != 0 || ver == 0) {
+        let header = 0x10 + ver + ((size as u32) << 8);
+        out.write_u32::<LittleEndian>(header)?;
+    } else {
+        out.write_u32::<LittleEndian>(0x11)?;
+        out.write_u32::<LittleEndian>(size as u32)?;
+    }
+
+    let mut off: usize = 0;
+    let mut byte: u8 = 0;
+    let mut index = 7;
+    let mut cmpbuf: Vec<u8> = Vec::new();
+
+    while off < size {
+        match find_longest_match(inp, off, repeat_size as usize) {
+            None => {
+                index -= 1;
+                cmpbuf.push(inp[off]);
+                off += 1;
+            }
+            Some((pos, len)) => {
+                let lz_off: usize = off - pos - 1;
+                byte |= 1 << index;
+                index -= 1;
+                if ver == 0 {
+                    let l = len - 3;
+                    let cmp: [u8; 2] = [((lz_off >> 8) as u8) + ((l << 4) as u8), lz_off as u8];
+                    cmpbuf.extend_from_slice(&cmp);
+                } else if len < 0x11 {
+                    let l = len - 1;
+                    let cmp: [u8; 2] = [((lz_off >> 8) as u8) + ((l << 4) as u8), lz_off as u8];
+                    cmpbuf.extend_from_slice(&cmp);
+                } else if len < 0x111 {
+                    let l = len - 0x11;
+                    let cmp: [u8; 3] =
+                        [(l >> 4) as u8, ((lz_off >> 8) as u8) + ((l << 4) as u8), lz_off as u8];
+                    cmpbuf.extend_from_slice(&cmp);
+                } else {
+                    let l = len - 0x111;
+                    let cmp: [u8; 4] = [
+                        (l >> 12) as u8 + 0x10,
+                        (l >> 4) as u8,
+                        ((lz_off >> 8) as u8) + ((l << 4) as u8),
+                        lz_off as u8,
+                    ];
+                    cmpbuf.extend_from_slice(&cmp);
+                }
+                off += len;
+            }
+        };
+        if index < 0 {
+            out.write_u8(byte)?;
+            out.write_all(&cmpbuf)?;
+            byte = 0;
+            index = 7;
+            cmpbuf.clear();
+        }
+    }
+    if !cmpbuf.is_empty() {
+        out.write_u8(byte)?;
+        out.write_all(&cmpbuf)?;
+    }
+    out.write_u8(0xFF)?;
+
+    Ok(())
+}
+
+/// This function is a convenience wrapper around `compress` for compressing to a Vec<u8>.
+/// Additionally, it uses LZ11 as compression algorithm by default.
+pub fn compress_arr(input: &[u8]) -> Result<Vec<u8>> {
+    let mut out: Vec<u8> = Vec::new();
+    {
+        let mut writer = Cursor::new(&mut out);
+        compress(input, &mut writer, CompressionLevel::LZ11(65809))?;
+    }
+    Ok(out)
+}
+
+fn get_needle_table(needle: &[u8]) -> [usize; 256] {
+    let mut needle_table = [needle.len(); 256];
+    for (i, c) in needle.iter().enumerate() {
+        needle_table[*c as usize] = needle.len() - i;
+    }
+    needle_table
+}
+
+pub fn search_one(haystack: &[u8], needle: &[u8], needle_table: &[usize; 256]) -> Option<usize> {
+    let mut cur = 0;
+    while haystack.len() - cur >= needle.len() {
+        let mut output = None;
+        for i in (0..needle.len()).rev() {
+            if haystack[cur + i] == needle[i] {
+                output = Some(cur);
+                break;
+            }
+        }
+        if output.is_some() {
+            return output;
+        }
+        cur += needle_table[haystack[cur + needle.len() - 1] as usize];
+    }
+    None
+}
+
+fn search(haystack: &[u8], needle: &[u8]) -> Vec<usize> {
+    let needle_table = get_needle_table(needle);
+    let mut cur = 0usize;
+    let mut positions = Vec::new();
+    while cur + needle.len() < haystack.len() {
+        let found_pos = search_one(&haystack[cur..], needle, &needle_table);
+        if let Some(pos) = found_pos {
+            positions.push(pos);
+            cur += pos + needle.len() + 1;
+        } else {
+            return positions;
+        }
+    }
+    positions
+}

src/util/path.rs

@@ -0,0 +1,26 @@
+use std::{
+    path::{Path, PathBuf},
+    str::Utf8Error,
+    string::FromUtf8Error,
+};
+
+use typed_path::{NativePath, NativePathBuf, Utf8NativePath, Utf8NativePathBuf};
+
+// For argp::FromArgs
+pub fn native_path(value: &str) -> Result<Utf8NativePathBuf, String> {
+    Ok(Utf8NativePathBuf::from(value))
+}
+
+/// Checks if the path is valid UTF-8 and returns it as a [`Utf8NativePath`].
+#[inline]
+pub fn check_path(path: &Path) -> Result<&Utf8NativePath, Utf8Error> {
+    Utf8NativePath::from_bytes_path(NativePath::new(path.as_os_str().as_encoded_bytes()))
+}
+
+/// Checks if the path is valid UTF-8 and returns it as a [`Utf8NativePathBuf`].
+#[inline]
+pub fn check_path_buf(path: PathBuf) -> Result<Utf8NativePathBuf, FromUtf8Error> {
+    Utf8NativePathBuf::from_bytes_path_buf(NativePathBuf::from(
+        path.into_os_string().into_encoded_bytes(),
+    ))
+}

src/util/rarc.rs

@@ -1,425 +1,283 @@
-// Source: https://github.com/Julgodis/picori/blob/650da9f4fe6050b39b80d5360416591c748058d5/src/rarc.rs
-// License: MIT
-// Modified to use `std::io::Cursor<&[u8]>` and project's FromReader trait
-use std::{
-    collections::HashMap,
-    fmt::Display,
-    hash::{Hash, Hasher},
-    io,
-    io::{Read, Seek, SeekFrom},
-    path::{Component, Path, PathBuf},
-};
+use std::{borrow::Cow, ffi::CStr};
 
-use anyhow::{anyhow, bail, ensure, Result};
+use typed_path::Utf8UnixPath;
+use zerocopy::{big_endian::*, FromBytes, Immutable, IntoBytes, KnownLayout};
 
-use crate::util::{
-    file::read_c_string,
-    reader::{struct_size, Endian, FromReader},
-};
-
-#[derive(Debug, Clone)]
-pub struct NamedHash {
-    pub name: String,
-    pub hash: u16,
-}
-
-impl Display for NamedHash {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.name)
-    }
-}
-
-impl Hash for NamedHash {
-    fn hash<H>(&self, state: &mut H)
-    where H: Hasher {
-        self.hash.hash(state);
-    }
-}
-
-impl PartialEq for NamedHash {
-    fn eq(&self, other: &Self) -> bool {
-        if self.hash == other.hash {
-            self.name == other.name
-        } else {
-            false
-        }
-    }
-}
-
-impl Eq for NamedHash {}
-
-#[derive(Debug, Clone)]
-enum RarcDirectory {
-    File {
-        /// Name of the file.
-        name: NamedHash,
-        /// Offset of the file in the RARC file. This offset is relative to the start of the RARC file.
-        offset: u64,
-        /// Size of the file.
-        size: u32,
-    },
-    Folder {
-        /// Name of the folder.
-        name: NamedHash,
-    },
-    CurrentFolder,
-    ParentFolder,
-}
-
-#[derive(Debug, Clone)]
-struct RarcNode {
-    /// Index of first directory.
-    pub index: u32,
-    /// Number of directories.
-    pub count: u32,
-}
-
-pub struct RarcReader {
-    directories: Vec<RarcDirectory>,
-    nodes: HashMap<NamedHash, RarcNode>,
-    root_node: NamedHash,
-}
+use crate::{static_assert, vfs::next_non_empty};
 
 pub const RARC_MAGIC: [u8; 4] = *b"RARC";
 
-struct RarcHeader {
+#[derive(Copy, Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
+#[repr(C, align(4))]
+pub struct RarcHeader {
+    /// Magic identifier. (Always "RARC")
     magic: [u8; 4],
-    _file_length: u32,
-    header_length: u32,
-    file_offset: u32,
-    _file_length_2: u32,
-    _unk0: u32,
-    _unk1: u32,
-    _unk2: u32,
-    node_count: u32,
-    node_offset: u32,
-    directory_count: u32,
-    directory_offset: u32,
-    string_table_length: u32,
-    string_table_offset: u32,
-    _file_count: u16,
-    _unk3: u16,
-    _unk4: u32,
+    /// Length of the RARC file.
+    file_len: U32,
+    /// Length of the header. (Always 32)
+    header_len: U32,
+    /// Start of the file data, relative to the end of the file header.
+    data_offset: U32,
+    /// Length of the file data.
+    data_len: U32,
+    _unk1: U32,
+    _unk2: U32,
+    _unk3: U32,
 }
 
-impl FromReader for RarcHeader {
-    type Args = ();
+static_assert!(size_of::<RarcHeader>() == 0x20);
 
-    const STATIC_SIZE: usize = struct_size([
-        4,                // magic
-        u32::STATIC_SIZE, // file_length
-        u32::STATIC_SIZE, // header_length
-        u32::STATIC_SIZE, // file_offset
-        u32::STATIC_SIZE, // file_length
-        u32::STATIC_SIZE, // unk0
-        u32::STATIC_SIZE, // unk1
-        u32::STATIC_SIZE, // unk2
-        u32::STATIC_SIZE, // node_count
-        u32::STATIC_SIZE, // node_offset
-        u32::STATIC_SIZE, // directory_count
-        u32::STATIC_SIZE, // directory_offset
-        u32::STATIC_SIZE, // string_table_length
-        u32::STATIC_SIZE, // string_table_offset
-        u16::STATIC_SIZE, // file_count
-        u16::STATIC_SIZE, // unk3
-        u32::STATIC_SIZE, // unk4
-    ]);
+impl RarcHeader {
+    /// Length of the RARC file.
+    pub fn file_len(&self) -> u32 { self.file_len.get() }
 
-    fn from_reader_args<R>(reader: &mut R, e: Endian, _args: Self::Args) -> io::Result<Self>
-    where R: Read + Seek + ?Sized {
-        let header = Self {
-            magic: <[u8; 4]>::from_reader(reader, e)?,
-            _file_length: u32::from_reader(reader, e)?,
-            header_length: u32::from_reader(reader, e)?,
-            file_offset: u32::from_reader(reader, e)?,
-            _file_length_2: u32::from_reader(reader, e)?,
-            _unk0: u32::from_reader(reader, e)?,
-            _unk1: u32::from_reader(reader, e)?,
-            _unk2: u32::from_reader(reader, e)?,
-            node_count: u32::from_reader(reader, e)?,
-            node_offset: u32::from_reader(reader, e)?,
-            directory_count: u32::from_reader(reader, e)?,
-            directory_offset: u32::from_reader(reader, e)?,
-            string_table_length: u32::from_reader(reader, e)?,
-            string_table_offset: u32::from_reader(reader, e)?,
-            _file_count: u16::from_reader(reader, e)?,
-            _unk3: u16::from_reader(reader, e)?,
-            _unk4: u32::from_reader(reader, e)?,
+    /// Length of the header.
+    pub fn header_len(&self) -> u32 { self.header_len.get() }
+
+    /// Start of the file data, relative to the end of the file header.
+    pub fn data_offset(&self) -> u32 { self.data_offset.get() }
+
+    /// Length of the file data.
+    pub fn data_len(&self) -> u32 { self.data_len.get() }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
+#[repr(C, align(4))]
+struct RarcInfo {
+    /// Number of directories in the directory table.
+    directory_count: U32,
+    /// Offset to the start of the directory table, relative to the end of the file header.
+    directory_offset: U32,
+    /// Number of nodes in the node table.
+    node_count: U32,
+    /// Offset to the start of the node table, relative to the end of the file header.
+    node_offset: U32,
+    /// Length of the string table.
+    string_table_len: U32,
+    /// Offset to the start of the string table, relative to the end of the file header.
+    string_table_offset: U32,
+    /// Number of files in the node table.
+    _file_count: U16,
+    _unk4: U16,
+    _unk5: U32,
+}
+
+static_assert!(size_of::<RarcInfo>() == 0x20);
+
+#[derive(Copy, Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
+#[repr(C, align(4))]
+pub struct RarcNode {
+    /// Index of the node. (0xFFFF for directories)
+    index: U16,
+    /// Hash of the node name.
+    name_hash: U16,
+    /// Unknown. (0x200 for folders, 0x1100 for files)
+    _unk0: U16,
+    /// Offset in the string table to the node name.
+    name_offset: U16,
+    /// Files: Offset in the data to the file data.
+    /// Directories: Index of the directory in the directory table.
+    data_offset: U32,
+    /// Files: Length of the data.
+    /// Directories: Unknown. Always 16.
+    data_length: U32,
+    _unk1: U32,
+}
+
+static_assert!(size_of::<RarcNode>() == 0x14);
+
+impl RarcNode {
+    /// Whether the node is a file.
+    pub fn is_file(&self) -> bool { self.index.get() != 0xFFFF }
+
+    /// Whether the node is a directory.
+    pub fn is_dir(&self) -> bool { self.index.get() == 0xFFFF }
+
+    /// Offset in the string table to the node name.
+    pub fn name_offset(&self) -> u32 { self.name_offset.get() as u32 }
+
+    /// Files: Offset in the data to the file data.
+    /// Directories: Index of the directory in the directory table.
+    pub fn data_offset(&self) -> u32 { self.data_offset.get() }
+
+    /// Files: Length of the data.
+    /// Directories: Unknown. Always 16.
+    pub fn data_length(&self) -> u32 { self.data_length.get() }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
+#[repr(C, align(4))]
+pub struct RarcDirectory {
+    /// Identifier of the directory.
+    identifier: [u8; 4],
+    /// Offset in the string table to the directory name.
+    name_offset: U32,
+    /// Hash of the directory name.
+    name_hash: U16,
+    /// Number of nodes in the directory.
+    count: U16,
+    /// Index of the first node in the directory.
+    index: U32,
+}
+
+static_assert!(size_of::<RarcDirectory>() == 0x10);
+
+impl RarcDirectory {
+    /// Offset in the string table to the directory name.
+    pub fn name_offset(&self) -> u32 { self.name_offset.get() }
+
+    /// Index of the first node in the directory.
+    pub fn node_index(&self) -> u32 { self.index.get() }
+
+    /// Number of nodes in the directory.
+    pub fn node_count(&self) -> u16 { self.count.get() }
+}
+
+/// A view into a RARC archive.
+pub struct RarcView<'a> {
+    /// The RARC archive header.
+    pub header: &'a RarcHeader,
+    /// The directories in the RARC archive.
+    pub directories: &'a [RarcDirectory],
+    /// The nodes in the RARC archive.
+    pub nodes: &'a [RarcNode],
+    /// The string table containing all file and directory names.
+    pub string_table: &'a [u8],
+    /// The file data.
+    pub data: &'a [u8],
+}
+
+impl<'a> RarcView<'a> {
+    /// Create a new RARC view from a buffer.
+    pub fn new(buf: &'a [u8]) -> Result<Self, &'static str> {
+        let Ok((header, remaining)) = RarcHeader::ref_from_prefix(buf) else {
+            return Err("Buffer not large enough for RARC header");
         };
         if header.magic != RARC_MAGIC {
-            return Err(io::Error::new(
-                io::ErrorKind::InvalidData,
-                format!("invalid RARC magic: {:?}", header.magic),
-            ));
+            return Err("RARC magic mismatch");
         }
-        if header.node_count >= 0x10000 {
-            return Err(io::Error::new(
-                io::ErrorKind::InvalidData,
-                format!("invalid node count: {}", header.node_count),
-            ));
+        if header.header_len.get() as usize != size_of::<RarcHeader>() {
+            return Err("RARC header size mismatch");
         }
-        if header.directory_count >= 0x10000 {
-            return Err(io::Error::new(
-                io::ErrorKind::InvalidData,
-                format!("invalid directory count: {}", header.directory_count),
-            ));
+
+        // All offsets are relative to the _end_ of the header, so we can
+        // just trim the header from the buffer and use the offsets as is.
+        let Ok((info, _)) = RarcInfo::ref_from_prefix(remaining) else {
+            return Err("Buffer not large enough for RARC info");
+        };
+
+        let directory_table_offset = info.directory_offset.get() as usize;
+        let directory_table_size = info.directory_count.get() as usize * size_of::<RarcDirectory>();
+        let directories_buf = remaining
+            .get(directory_table_offset..directory_table_offset + directory_table_size)
+            .ok_or("RARC directory table out of bounds")?;
+        let directories = <[RarcDirectory]>::ref_from_bytes(directories_buf)
+            .map_err(|_| "RARC directory table not aligned")?;
+        if directories.is_empty() || directories[0].identifier != *b"ROOT" {
+            return Err("RARC root directory not found");
         }
-        Ok(header)
+
+        let node_table_offset = info.node_offset.get() as usize;
+        let node_table_size = info.node_count.get() as usize * size_of::<RarcNode>();
+        let nodes_buf = remaining
+            .get(node_table_offset..node_table_offset + node_table_size)
+            .ok_or("RARC node table out of bounds")?;
+        let nodes =
+            <[RarcNode]>::ref_from_bytes(nodes_buf).map_err(|_| "RARC node table not aligned")?;
+
+        let string_table_offset = info.string_table_offset.get() as usize;
+        let string_table_size = info.string_table_len.get() as usize;
+        let string_table = remaining
+            .get(string_table_offset..string_table_offset + string_table_size)
+            .ok_or("RARC string table out of bounds")?;
+
+        let data_offset = header.data_offset.get() as usize;
+        let data_size = header.data_len.get() as usize;
+        let data =
+            buf.get(data_offset..data_offset + data_size).ok_or("RARC file data out of bounds")?;
+
+        Ok(Self { header, directories, nodes, string_table, data })
     }
-}
 
-struct RarcFileNode {
-    index: u16,
-    name_hash: u16,
-    _unk0: u16, // 0x200 for folders, 0x1100 for files
-    name_offset: u16,
-    data_offset: u32,
-    data_length: u32,
-    _unk1: u32,
-}
-
-impl FromReader for RarcFileNode {
-    type Args = ();
-
-    const STATIC_SIZE: usize = struct_size([
-        u16::STATIC_SIZE, // index
-        u16::STATIC_SIZE, // name_hash
-        u16::STATIC_SIZE, // unk0
-        u16::STATIC_SIZE, // name_offset
-        u32::STATIC_SIZE, // data_offset
-        u32::STATIC_SIZE, // data_length
-        u32::STATIC_SIZE, // unk1
-    ]);
-
-    fn from_reader_args<R>(reader: &mut R, e: Endian, _args: Self::Args) -> io::Result<Self>
-    where R: Read + Seek + ?Sized {
-        Ok(Self {
-            index: u16::from_reader(reader, e)?,
-            name_hash: u16::from_reader(reader, e)?,
-            _unk0: u16::from_reader(reader, e)?,
-            name_offset: u16::from_reader(reader, e)?,
-            data_offset: u32::from_reader(reader, e)?,
-            data_length: u32::from_reader(reader, e)?,
-            _unk1: u32::from_reader(reader, e)?,
-        })
+    /// Get a string from the string table at the given offset.
+    pub fn get_string(&self, offset: u32) -> Result<Cow<str>, String> {
+        let name_buf = self.string_table.get(offset as usize..).ok_or_else(|| {
+            format!(
+                "RARC: name offset {} out of bounds (string table size: {})",
+                offset,
+                self.string_table.len()
+            )
+        })?;
+        let c_string = CStr::from_bytes_until_nul(name_buf)
+            .map_err(|_| format!("RARC: name at offset {} not null-terminated", offset))?;
+        Ok(c_string.to_string_lossy())
     }
-}
 
-struct RarcDirectoryNode {
-    _identifier: u32,
-    name_offset: u32,
-    name_hash: u16,
-    count: u16,
-    index: u32,
-}
-
-impl FromReader for RarcDirectoryNode {
-    type Args = ();
-
-    const STATIC_SIZE: usize = struct_size([
-        u32::STATIC_SIZE, // identifier
-        u32::STATIC_SIZE, // name_offset
-        u16::STATIC_SIZE, // name_hash
-        u16::STATIC_SIZE, // count
-        u32::STATIC_SIZE, // index
-    ]);
-
-    fn from_reader_args<R>(reader: &mut R, e: Endian, _args: Self::Args) -> io::Result<Self>
-    where R: Read + Seek + ?Sized {
-        Ok(Self {
-            _identifier: u32::from_reader(reader, e)?,
-            name_offset: u32::from_reader(reader, e)?,
-            name_hash: u16::from_reader(reader, e)?,
-            count: u16::from_reader(reader, e)?,
-            index: u32::from_reader(reader, e)?,
-        })
+    /// Get the data for a file node.
+    pub fn get_data(&self, node: RarcNode) -> Result<&[u8], &'static str> {
+        if node.is_dir() {
+            return Err("Cannot get data for a directory node");
+        }
+        let offset = node.data_offset.get() as usize;
+        let size = node.data_length.get() as usize;
+        self.data.get(offset..offset + size).ok_or("RARC file data out of bounds")
     }
-}
 
-impl RarcReader {
-    /// Creates a new RARC reader.
-    pub fn new<R>(reader: &mut R) -> Result<Self>
-    where R: Read + Seek + ?Sized {
-        let base = reader.stream_position()?;
-        let header = RarcHeader::from_reader(reader, Endian::Big)?;
+    /// Finds a particular file or directory by path.
+    pub fn find(&self, path: &Utf8UnixPath) -> Option<RarcNodeKind> {
+        let mut split = path.as_str().split('/');
+        let mut current = next_non_empty(&mut split);
 
-        let base = base + header.header_length as u64;
-        let directory_base = base + header.directory_offset as u64;
-        let data_base = base + header.file_offset as u64;
-        let mut directories = Vec::with_capacity(header.directory_count as usize);
-        for i in 0..header.directory_count {
-            reader.seek(SeekFrom::Start(directory_base + 20 * i as u64))?;
-            let node = RarcFileNode::from_reader(reader, Endian::Big)?;
+        let mut dir_idx = 0;
+        let mut dir = self.directories[dir_idx];
+        // Allow matching the root directory by name optionally
+        if let Ok(root_name) = self.get_string(dir.name_offset()) {
+            if root_name.eq_ignore_ascii_case(current) {
+                current = next_non_empty(&mut split);
+            }
+        }
+        if current.is_empty() {
+            return Some(RarcNodeKind::Directory(dir_idx, dir));
+        }
 
-            let name = {
-                let offset = header.string_table_offset as u64;
-                let offset = offset + node.name_offset as u64;
-                ensure!(
-                    (node.name_offset as u32) < header.string_table_length,
-                    "invalid string table offset"
-                );
-                read_c_string(reader, base + offset)
-            }?;
-
-            if node.index == 0xFFFF {
-                if name == "." {
-                    directories.push(RarcDirectory::CurrentFolder);
-                } else if name == ".." {
-                    directories.push(RarcDirectory::ParentFolder);
+        let mut idx = dir.index.get() as usize;
+        while idx < dir.index.get() as usize + dir.count.get() as usize {
+            let node = self.nodes.get(idx).copied()?;
+            let Ok(name) = self.get_string(node.name_offset()) else {
+                idx += 1;
+                continue;
+            };
+            if name.eq_ignore_ascii_case(current) {
+                current = next_non_empty(&mut split);
+                if node.is_dir() {
+                    dir_idx = node.data_offset.get() as usize;
+                    dir = self.directories.get(dir_idx).cloned()?;
+                    idx = dir.index.get() as usize;
+                    if current.is_empty() {
+                        return Some(RarcNodeKind::Directory(dir_idx, dir));
                     } else {
-                    directories.push(RarcDirectory::Folder {
-                        name: NamedHash { name, hash: node.name_hash },
-                    });
+                        continue;
                     }
                 } else {
-                directories.push(RarcDirectory::File {
-                    name: NamedHash { name, hash: node.name_hash },
-                    offset: data_base + node.data_offset as u64,
-                    size: node.data_length,
-                });
+                    return Some(RarcNodeKind::File(idx, node));
                 }
             }
+            idx += 1;
+        }
 
-        let node_base = base + header.node_offset as u64;
-        let mut root_node: Option<NamedHash> = None;
-        let mut nodes = HashMap::with_capacity(header.node_count as usize);
-        for i in 0..header.node_count {
-            reader.seek(SeekFrom::Start(node_base + 16 * i as u64))?;
-            let node = RarcDirectoryNode::from_reader(reader, Endian::Big)?;
-
-            ensure!(node.index < header.directory_count, "first directory index out of bounds");
-
-            let last_index = node.index.checked_add(node.count as u32);
-            ensure!(
-                last_index.is_some() && last_index.unwrap() <= header.directory_count,
-                "last directory index out of bounds"
-            );
-
-            let name = {
-                let offset = header.string_table_offset as u64;
-                let offset = offset + node.name_offset as u64;
-                ensure!(
-                    node.name_offset < header.string_table_length,
-                    "invalid string table offset"
-                );
-                read_c_string(reader, base + offset)
-            }?;
-
-            // FIXME: this assumes that the root node is the first node in the list
-            if root_node.is_none() {
-                root_node = Some(NamedHash { name: name.clone(), hash: node.name_hash });
-            }
-
-            let name = NamedHash { name, hash: node.name_hash };
-            nodes.insert(name.clone(), RarcNode { index: node.index, count: node.count as u32 });
-        }
-
-        if let Some(root_node) = root_node {
-            Ok(Self { directories, nodes, root_node })
-        } else {
-            Err(anyhow!("no root node"))
-        }
-    }
-
-    /// Get a iterator over the nodes in the RARC file.
-    pub fn nodes(&self) -> Nodes<'_> {
-        let root_node = self.root_node.clone();
-        Nodes { parent: self, stack: vec![NodeState::Begin(root_node)] }
-    }
-
-    /// Find a file in the RARC file.
-    pub fn find_file<P>(&self, path: P) -> Result<Option<(u64, u32)>>
-    where P: AsRef<Path> {
-        let mut cmp_path = PathBuf::new();
-        for component in path.as_ref().components() {
-            match component {
-                Component::Normal(name) => cmp_path.push(name.to_ascii_lowercase()),
-                Component::RootDir => {}
-                component => bail!("Invalid path component: {:?}", component),
-            }
-        }
-
-        let mut current_path = PathBuf::new();
-        for node in self.nodes() {
-            match node {
-                Node::DirectoryBegin { name } => {
-                    current_path.push(name.name.to_ascii_lowercase());
-                }
-                Node::DirectoryEnd { name: _ } => {
-                    current_path.pop();
-                }
-                Node::File { name, offset, size } => {
-                    if current_path.join(name.name.to_ascii_lowercase()) == cmp_path {
-                        return Ok(Some((offset, size)));
-                    }
-                }
-                Node::CurrentDirectory => {}
-                Node::ParentDirectory => {}
-            }
-        }
-        Ok(None)
-    }
-}
-
-/// A node in an RARC file.
-pub enum Node {
-    /// A directory that has been entered.
-    DirectoryBegin { name: NamedHash },
-    /// A directory that has been exited.
-    DirectoryEnd { name: NamedHash },
-    /// A file in the current directory.
-    File { name: NamedHash, offset: u64, size: u32 },
-    /// The current directory. This is equivalent to ".".
-    CurrentDirectory,
-    /// The parent directory. This is equivalent to "..".
-    ParentDirectory,
-}
-
-enum NodeState {
-    Begin(NamedHash),
-    End(NamedHash),
-    File(NamedHash, u32),
-}
-
-/// An iterator over the nodes in an RARC file.
-pub struct Nodes<'parent> {
-    parent: &'parent RarcReader,
-    stack: Vec<NodeState>,
-}
-
-impl<'parent> Iterator for Nodes<'parent> {
-    type Item = Node;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        match self.stack.pop()? {
-            NodeState::Begin(name) => {
-                self.stack.push(NodeState::File(name.clone(), 0));
-                Some(Node::DirectoryBegin { name })
-            }
-            NodeState::End(name) => Some(Node::DirectoryEnd { name }),
-            NodeState::File(name, index) => {
-                if let Some(node) = self.parent.nodes.get(&name) {
-                    if index + 1 >= node.count {
-                        self.stack.push(NodeState::End(name.clone()));
-                    } else {
-                        self.stack.push(NodeState::File(name.clone(), index + 1));
-                    }
-                    let directory = &self.parent.directories[(node.index + index) as usize];
-                    match directory {
-                        RarcDirectory::CurrentFolder => Some(Node::CurrentDirectory),
-                        RarcDirectory::ParentFolder => Some(Node::ParentDirectory),
-                        RarcDirectory::Folder { name } => {
-                            self.stack.push(NodeState::Begin(name.clone()));
-                            self.next()
-                        }
-                        RarcDirectory::File { name, offset, size } => {
-                            Some(Node::File { name: name.clone(), offset: *offset, size: *size })
-                        }
-                    }
-                } else {
         None
     }
-            }
-        }
+
+    /// Get the children of a directory.
+    pub fn children(&self, dir: RarcDirectory) -> &[RarcNode] {
+        let start = dir.node_index() as usize;
+        let end = start + dir.node_count() as usize;
+        self.nodes.get(start..end).unwrap_or(&[])
     }
 }
+
+#[derive(Debug)]
+pub enum RarcNodeKind {
+    File(usize, RarcNode),
+    Directory(usize, RarcDirectory),
+}

src/util/rel.rs

@@ -13,7 +13,7 @@ use crate::{
     array_ref_mut,
     obj::{
         ObjArchitecture, ObjInfo, ObjKind, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbol,
-        ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind, SectionIndex,
     },
     util::{
         align_up,
@@ -418,7 +418,7 @@ where R: Read + Seek + ?Sized {
                 _ => None, // determined later
             }
             .unwrap_or_default() as u64,
-            elf_index: idx,
+            elf_index: idx as SectionIndex,
             relocations: Default::default(),
             virtual_address: None, // TODO option to set?
             file_offset: offset as u64,
@@ -440,7 +440,7 @@ where R: Read + Seek + ?Sized {
                 let (section_index, _) = sections
                     .iter()
                     .enumerate()
-                    .find(|&(_, section)| section.elf_index == rel_section_idx as usize)
+                    .find(|&(_, section)| section.elf_index == rel_section_idx as SectionIndex)
                     .ok_or_else(|| anyhow!("Failed to locate {name} section {rel_section_idx}"))?;
                 log::debug!("Adding {name} section {rel_section_idx} offset {offset:#X}");
                 let mut flags = ObjSymbolFlagSet(ObjSymbolFlags::Global.into());
@@ -450,7 +450,7 @@ where R: Read + Seek + ?Sized {
                 symbols.push(ObjSymbol {
                     name: name.to_string(),
                     address: offset as u64,
-                    section: Some(section_index),
+                    section: Some(section_index as SectionIndex),
                     flags,
                     kind: ObjSymbolKind::Function,
                     ..Default::default()
@@ -853,8 +853,10 @@ where
         offset = (offset + align) & !align;
         offset += section.size() as u32;
     }
+    if info.version >= 3 {
         // Align to 4 after section data
         offset = (offset + 3) & !3;
+    }
 
     fn do_relocation_layout(
         relocations: &[RelReloc],
@@ -1047,8 +1049,8 @@ where
         }
         w.write_all(&section_data)?;
     }
+    if info.version >= 3 {
         // Align to 4 after section data
-    {
         let position = w.stream_position()?;
         w.write_all(&vec![0u8; calculate_padding(position, 4) as usize])?;
     }

src/util/rso.rs

@@ -9,7 +9,7 @@ use cwdemangle::{demangle, DemangleOptions};
 use crate::{
     obj::{
         ObjArchitecture, ObjInfo, ObjKind, ObjSection, ObjSectionKind, ObjSymbol, ObjSymbolFlagSet,
-        ObjSymbolFlags, ObjSymbolKind,
+        ObjSymbolFlags, ObjSymbolKind, SectionIndex,
     },
     util::{
         file::{read_c_string, read_string},
@@ -34,11 +34,16 @@ pub const DOL_SECTION_NAMES: [Option<&str>; 14] = [
     Some(".sbss2"),
     None, // s_zero2
 ];
+
+pub const RSO_SECTION_NAMES: [&str; 7] =
+    [".init", ".text", ".ctors", ".dtors", ".rodata", ".data", ".bss"];
+
 /// extabindex section index.
 pub const DOL_SECTION_ETI: u32 = 241;
 /// ABS symbol section index.
 pub const DOL_SECTION_ABS: u32 = 65521;
 
+#[derive(Default)]
 pub struct RsoHeader {
     // Pointer to the next module, forming a linked list. Always 0, filled in at runtime.
     // pub next: u32,
@@ -101,6 +106,10 @@ pub struct RsoHeader {
     pub import_table_name_offset: u32,
 }
 
+impl RsoHeader {
+    pub fn new() -> Self { Self { version: 1, ..Default::default() } }
+}
+
 impl FromReader for RsoHeader {
     type Args = ();
 
@@ -205,13 +214,46 @@ impl FromReader for RsoHeader {
     }
 }
 
-#[derive(Copy, Clone, Debug)]
+impl ToWriter for RsoHeader {
+    fn to_writer<W>(&self, writer: &mut W, e: Endian) -> io::Result<()>
+    where W: Write + ?Sized {
+        (0u64).to_writer(writer, e)?; // next and prev
+        self.num_sections.to_writer(writer, e)?;
+        self.section_info_offset.to_writer(writer, e)?;
+        self.name_offset.to_writer(writer, e)?;
+        self.name_size.to_writer(writer, e)?;
+        self.version.to_writer(writer, e)?;
+        self.bss_size.to_writer(writer, e)?;
+        self.prolog_section.to_writer(writer, e)?;
+        self.epilog_section.to_writer(writer, e)?;
+        self.unresolved_section.to_writer(writer, e)?;
+        (0u8).to_writer(writer, e)?; // bss_section
+        self.prolog_offset.to_writer(writer, e)?;
+        self.epilog_offset.to_writer(writer, e)?;
+        self.unresolved_offset.to_writer(writer, e)?;
+        self.internal_rel_offset.to_writer(writer, e)?;
+        self.internal_rel_size.to_writer(writer, e)?;
+        self.external_rel_offset.to_writer(writer, e)?;
+        self.external_rel_size.to_writer(writer, e)?;
+        self.export_table_offset.to_writer(writer, e)?;
+        self.export_table_size.to_writer(writer, e)?;
+        self.export_table_name_offset.to_writer(writer, e)?;
+        self.import_table_offset.to_writer(writer, e)?;
+        self.import_table_size.to_writer(writer, e)?;
+        self.import_table_name_offset.to_writer(writer, e)?;
+        Ok(())
+    }
+
+    fn write_size(&self) -> usize { Self::STATIC_SIZE }
+}
+
+#[derive(Copy, Clone, Debug, Default)]
 pub struct RsoSectionHeader {
     /// Absolute offset of the section.
     /// The lowest bit is set if the section is executable.
-    offset_and_flags: u32,
+    pub offset_and_flags: u32,
     /// Size of the section.
-    size: u32,
+    pub size: u32,
 }
 
 impl FromReader for RsoSectionHeader {
@@ -255,17 +297,17 @@ impl RsoSectionHeader {
     pub fn exec(&self) -> bool { self.offset_and_flags & 1 != 0 }
 }
 
-struct RsoRelocation {
+pub struct RsoRelocation {
     /// Absolute offset of this relocation (relative to the start of the RSO file).
-    offset: u32,
+    pub offset: u32,
     /// For internal relocations, this is the section index of the symbol being patched to.
     /// For external relocations, this is the index of the symbol within the import symbol table.
     /// The lowest 8 bits are the relocation type.
-    id_and_type: u32,
+    pub id_and_type: u32,
     /// For internal relocations, this is the section-relative offset of the target symbol.
     /// For external relocations, this is unused and always 0 (the offset is calculated using the
     /// import symbol table).
-    target_offset: u32,
+    pub target_offset: u32,
 }
 
 impl FromReader for RsoRelocation {
@@ -315,22 +357,23 @@ impl RsoRelocation {
 }
 
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
-enum RsoSymbolKind {
+pub enum RsoSymbolKind {
     Import,
     Export,
 }
 
-struct RsoSymbol {
+#[derive(Debug)]
+pub struct RsoSymbol {
     /// Relative offset into the name table pointed to in the header,
     /// which points to the name of this symbol.
-    name_offset: u32,
+    pub name_offset: u32,
     /// The section-relative offset to the symbol. This is always 0 for imports.
-    offset: u32,
+    pub offset: u32,
     /// For exports, index of the section that contains this symbol.
-    /// For imports, appears to be an offset?
-    section_index: u32,
+    /// For imports, offset of the first relocation that use this symbol
+    pub section_index: u32,
     /// A hash of the symbol name. Only present for exports.
-    hash: Option<u32>,
+    pub hash: Option<u32>,
 }
 
 impl FromReader for RsoSymbol {
@@ -360,7 +403,8 @@ impl ToWriter for RsoSymbol {
         self.offset.to_writer(writer, e)?;
         self.section_index.to_writer(writer, e)?;
         if let Some(hash) = self.hash {
-            hash.to_writer(writer, e)?;
+            // Since the nature of the value is not numeric, we must preserve the order of the bytes
+            writer.write_all(&hash.to_ne_bytes())?;
         }
         Ok(())
     }
@@ -408,7 +452,7 @@ where R: Read + Seek + ?Sized {
             size: size as u64,
             data,
             align: 0,
-            elf_index: idx as usize,
+            elf_index: idx as SectionIndex,
             relocations: Default::default(),
             virtual_address: None, // TODO option to set?
             file_offset: offset as u64,
@@ -432,13 +476,13 @@ where R: Read + Seek + ?Sized {
             let (section_index, _) = sections
                 .iter()
                 .enumerate()
-                .find(|&(_, section)| section.elf_index == rel_section_idx as usize)
+                .find(|&(_, section)| section.elf_index == rel_section_idx as SectionIndex)
                 .ok_or_else(|| anyhow!("Failed to locate {name} section {rel_section_idx}"))?;
             log::debug!("Adding {name} section {rel_section_idx} offset {offset:#X}");
             symbols.push(ObjSymbol {
                 name: name.to_string(),
                 address: offset as u64,
-                section: Some(section_index),
+                section: Some(section_index as SectionIndex),
                 flags: ObjSymbolFlagSet(ObjSymbolFlags::Global.into()),
                 kind: ObjSymbolKind::Function,
                 ..Default::default()
@@ -482,7 +526,7 @@ where R: Read + Seek + ?Sized {
         let section = sections
             .iter()
             .enumerate()
-            .find(|&(_, section)| section.elf_index == symbol.section_index as usize)
+            .find(|&(_, section)| section.elf_index == symbol.section_index as SectionIndex)
             .map(|(idx, _)| idx)
             // HACK: selfiles won't have any sections
             .unwrap_or(symbol.section_index as usize);
@@ -497,7 +541,7 @@ where R: Read + Seek + ?Sized {
             name,
             demangled_name,
             address: symbol.offset as u64,
-            section: Some(section),
+            section: Some(section as SectionIndex),
             ..Default::default()
         });
     }
@@ -524,7 +568,7 @@ where R: Read + Seek + ?Sized {
     Ok(obj)
 }
 
-fn symbol_hash(s: &str) -> u32 {
+pub fn symbol_hash(s: &str) -> u32 {
     s.bytes().fold(0u32, |hash, c| {
         let mut m = (hash << 4).wrapping_add(c as u32);
         let n = m & 0xF0000000;

src/util/signatures.rs

@@ -1,13 +1,11 @@
-use std::{
-    collections::{btree_map, BTreeMap},
-    path::Path,
-};
+use std::collections::{btree_map, BTreeMap};
 
 use anyhow::{anyhow, bail, ensure, Result};
 use base64::{engine::general_purpose::STANDARD, Engine};
 use cwdemangle::{demangle, DemangleOptions};
 use serde::{Deserialize, Serialize};
 use sha1::{Digest, Sha1};
+use typed_path::Utf8NativePath;
 
 use crate::{
     analysis::{
@@ -18,7 +16,7 @@ use crate::{
     array_ref,
     obj::{
         ObjInfo, ObjKind, ObjReloc, ObjRelocKind, ObjSection, ObjSymbol, ObjSymbolFlagSet,
-        ObjSymbolKind,
+        ObjSymbolKind, SectionIndex, SymbolIndex,
     },
     util::elf::process_elf,
 };
@@ -36,13 +34,13 @@ pub struct OutSymbol {
 pub struct OutReloc {
     pub offset: u32,
     pub kind: ObjRelocKind,
-    pub symbol: usize,
+    pub symbol: u32,
     pub addend: i32,
 }
 
 #[derive(Debug, Clone, Hash, Eq, PartialEq, Serialize, Deserialize)]
 pub struct FunctionSignature {
-    pub symbol: usize,
+    pub symbol: u32,
     pub hash: String,
     pub signature: String,
     pub symbols: Vec<OutSymbol>,
@@ -92,12 +90,12 @@ pub fn check_signatures(
     let mut name = None;
     for signature in signatures {
         if name.is_none() {
-            name = Some(signature.symbols[signature.symbol].name.clone());
+            name = Some(signature.symbols[signature.symbol as usize].name.clone());
         }
         if check_signature(data, signature)? {
             log::debug!(
                 "Found {} @ {:#010X} (hash {})",
-                signature.symbols[signature.symbol].name,
+                signature.symbols[signature.symbol as usize].name,
                 addr,
                 signature.hash
             );
@@ -114,9 +112,9 @@ pub fn apply_symbol(
     obj: &mut ObjInfo,
     target: SectionAddress,
     sig_symbol: &OutSymbol,
-) -> Result<usize> {
+) -> Result<SymbolIndex> {
     let mut target_section_index =
-        if target.section == usize::MAX { None } else { Some(target.section) };
+        if target.section == SectionIndex::MAX { None } else { Some(target.section) };
     if let Some(target_section_index) = target_section_index {
         let target_section = &mut obj.sections[target_section_index];
         if !target_section.section_known {
@@ -154,7 +152,7 @@ pub fn apply_signature(
     addr: SectionAddress,
     signature: &FunctionSignature,
 ) -> Result<()> {
-    let in_symbol = &signature.symbols[signature.symbol];
+    let in_symbol = &signature.symbols[signature.symbol as usize];
     let symbol_idx = apply_symbol(obj, addr, in_symbol)?;
     let mut tracker = Tracker::new(obj);
     for reloc in &signature.relocations {
@@ -185,7 +183,7 @@ pub fn apply_signature(
             }
             _ => bail!("Relocation mismatch: {:?} != {:?}", reloc, sig_reloc.kind),
         };
-        let sig_symbol = &signature.symbols[sig_reloc.symbol];
+        let sig_symbol = &signature.symbols[sig_reloc.symbol as usize];
         // log::info!("Processing relocation {:#010X} {:?} -> {:#010X} {:?}", reloc_addr, reloc, target, sig_symbol);
         let target_symbol_idx = apply_symbol(obj, target, sig_symbol)?;
         let obj_reloc = ObjReloc {
@@ -200,7 +198,7 @@ pub fn apply_signature(
     for reloc in &signature.relocations {
         let addr = addr + reloc.offset;
         if !tracker.relocations.contains_key(&addr) {
-            let sig_symbol = &signature.symbols[reloc.symbol];
+            let sig_symbol = &signature.symbols[reloc.symbol as usize];
             bail!("Missing relocation @ {:#010X}: {:?} -> {:?}", addr, reloc, sig_symbol);
         }
     }
@@ -246,11 +244,13 @@ pub fn compare_signature(existing: &mut FunctionSignature, new: &FunctionSignatu
     Ok(())
 }
 
-pub fn generate_signature<P>(path: P, symbol_name: &str) -> Result<Option<FunctionSignature>>
-where P: AsRef<Path> {
+pub fn generate_signature(
+    path: &Utf8NativePath,
+    symbol_name: &str,
+) -> Result<Option<FunctionSignature>> {
     let mut out_symbols: Vec<OutSymbol> = Vec::new();
     let mut out_relocs: Vec<OutReloc> = Vec::new();
-    let mut symbol_map: BTreeMap<usize, usize> = BTreeMap::new();
+    let mut symbol_map: BTreeMap<SymbolIndex, u32> = BTreeMap::new();
 
     let mut obj = process_elf(path)?;
     if obj.kind == ObjKind::Executable
@@ -312,7 +312,7 @@ where P: AsRef<Path> {
                 let symbol_idx = match symbol_map.entry(reloc.target_symbol) {
                     btree_map::Entry::Vacant(e) => {
                         let target = &obj.symbols[reloc.target_symbol];
-                        let symbol_idx = out_symbols.len();
+                        let symbol_idx = out_symbols.len() as u32;
                         e.insert(symbol_idx);
                         out_symbols.push(OutSymbol {
                             kind: target.kind,

src/util/split.rs

@@ -1,6 +1,6 @@
 use std::{
     cmp::{max, min, Ordering},
-    collections::{BTreeMap, HashMap, HashSet},
+    collections::{btree_map, BTreeMap, HashMap, HashSet},
 };
 
 use anyhow::{anyhow, bail, ensure, Context, Result};
@@ -15,7 +15,7 @@ use crate::{
     obj::{
         ObjArchitecture, ObjInfo, ObjKind, ObjReloc, ObjRelocations, ObjSection, ObjSectionKind,
         ObjSplit, ObjSymbol, ObjSymbolFlagSet, ObjSymbolFlags, ObjSymbolKind, ObjSymbolScope,
-        ObjUnit,
+        ObjUnit, SectionIndex, SymbolIndex,
     },
     util::{align_up, comment::MWComment},
 };
@@ -444,8 +444,8 @@ fn create_gap_splits(obj: &mut ObjInfo) -> Result<()> {
 
 /// Ensures that all .bss splits following a common split are also marked as common.
 fn update_common_splits(obj: &mut ObjInfo, common_start: Option<u32>) -> Result<()> {
-    let Some((bss_section_index, common_bss_start)) = (match common_start {
-        Some(addr) => Some((
+    let Some(common_bss_start) = (match common_start {
+        Some(addr) => Some(SectionAddress::new(
             obj.sections.by_name(".bss")?.ok_or_else(|| anyhow!("Failed to find .bss section"))?.0,
             addr,
         )),
@@ -454,8 +454,8 @@ fn update_common_splits(obj: &mut ObjInfo, common_start: Option<u32>) -> Result<
         return Ok(());
     };
     log::debug!("Found common BSS start at {:#010X}", common_bss_start);
-    let bss_section = &mut obj.sections[bss_section_index];
-    for (addr, split) in bss_section.splits.for_range_mut(common_bss_start..) {
+    let bss_section = &mut obj.sections[common_bss_start.section];
+    for (addr, split) in bss_section.splits.for_range_mut(common_bss_start.address..) {
         if !split.common {
             split.common = true;
             log::debug!("Added common flag to split {} at {:#010X}", split.unit, addr);
@@ -593,8 +593,8 @@ fn add_padding_symbols(obj: &mut ObjInfo) -> Result<()> {
             .peekable();
         while let Some((_, symbol)) = iter.next() {
             // Common BSS is allowed to have gaps and overlaps to accurately match the common BSS inflation bug
-            if matches!(common_bss, Some((idx, addr)) if
-                section_index == idx && symbol.address as u32 >= addr)
+            if matches!(common_bss, Some(addr) if
+                section_index == addr.section && symbol.address as u32 >= addr.address)
             {
                 continue;
             }
@@ -758,19 +758,24 @@ fn trim_linker_generated_symbols(obj: &mut ObjInfo) -> Result<()> {
 pub fn update_splits(obj: &mut ObjInfo, common_start: Option<u32>, fill_gaps: bool) -> Result<()> {
     // Create splits for extab and extabindex entries
     if let Some((section_index, section)) = obj.sections.by_name("extabindex")? {
+        if !section.data.is_empty() {
             let start = SectionAddress::new(section_index, section.address as u32);
             split_extabindex(obj, start)?;
         }
+    }
 
     // Create splits for .ctors entries
     if let Some((section_index, section)) = obj.sections.by_name(".ctors")? {
+        if !section.data.is_empty() {
             let start = SectionAddress::new(section_index, section.address as u32);
             let end = start + (section.size as u32 - 4);
             split_ctors_dtors(obj, start, end)?;
         }
+    }
 
     // Create splits for .dtors entries
     if let Some((section_index, section)) = obj.sections.by_name(".dtors")? {
+        if !section.data.is_empty() {
             let mut start = SectionAddress::new(section_index, section.address as u32);
             let end = start + (section.size as u32 - 4);
             if obj.kind == ObjKind::Executable {
@@ -779,6 +784,7 @@ pub fn update_splits(obj: &mut ObjInfo, common_start: Option<u32>, fill_gaps: bo
             }
             split_ctors_dtors(obj, start, end)?;
         }
+    }
 
     // Remove linker generated symbols from splits
     trim_linker_generated_symbols(obj)?;
@@ -816,8 +822,8 @@ fn resolve_link_order(obj: &ObjInfo) -> Result<Vec<ObjUnit>> {
     #[allow(dead_code)]
     #[derive(Debug, Copy, Clone)]
     struct SplitEdge {
-        from: u32,
-        to: u32,
+        from: i64,
+        to: i64,
     }
 
     let mut graph = Graph::<String, SplitEdge>::new();
@@ -852,11 +858,36 @@ fn resolve_link_order(obj: &ObjInfo) -> Result<Vec<ObjUnit>> {
                 );
                 let a_index = *unit_to_index_map.get(&a.unit).unwrap();
                 let b_index = *unit_to_index_map.get(&b.unit).unwrap();
-                graph.add_edge(a_index, b_index, SplitEdge { from: a_addr, to: b_addr });
+                graph.add_edge(a_index, b_index, SplitEdge {
+                    from: a_addr as i64,
+                    to: b_addr as i64,
+                });
             }
         }
     }
 
+    // Apply link order constraints provided by the user
+    let mut ordered_units = BTreeMap::<i32, String>::new();
+    for unit in &obj.link_order {
+        if let Some(order) = unit.order {
+            match ordered_units.entry(order) {
+                btree_map::Entry::Vacant(entry) => {
+                    entry.insert(unit.name.clone());
+                }
+                btree_map::Entry::Occupied(entry) => {
+                    bail!("Duplicate order {} for units {} and {}", order, entry.get(), unit.name);
+                }
+            }
+        }
+    }
+    let mut iter = ordered_units
+        .into_iter()
+        .filter_map(|(order, unit)| unit_to_index_map.get(&unit).map(|&index| (order, index)))
+        .peekable();
+    while let (Some((a_order, a_index)), Some((b_order, b_index))) = (iter.next(), iter.peek()) {
+        graph.add_edge(a_index, *b_index, SplitEdge { from: a_order as i64, to: *b_order as i64 });
+    }
+
     // use petgraph::{
     //     dot::{Config, Dot},
     //     graph::EdgeReference,
@@ -886,6 +917,7 @@ fn resolve_link_order(obj: &ObjInfo) -> Result<Vec<ObjUnit>> {
                         name: name.clone(),
                         autogenerated: obj.is_unit_autogenerated(name),
                         comment_version: None,
+                        order: None,
                     }
                 }
             })
@@ -901,11 +933,11 @@ fn resolve_link_order(obj: &ObjInfo) -> Result<Vec<ObjUnit>> {
 #[instrument(level = "debug", skip(obj))]
 pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo>> {
     let mut objects: Vec<ObjInfo> = vec![];
-    let mut object_symbols: Vec<Vec<Option<usize>>> = vec![];
+    let mut object_symbols: Vec<Vec<Option<SymbolIndex>>> = vec![];
     let mut name_to_obj: HashMap<String, usize> = HashMap::new();
     for unit in &obj.link_order {
         name_to_obj.insert(unit.name.clone(), objects.len());
-        object_symbols.push(vec![None; obj.symbols.count()]);
+        object_symbols.push(vec![None; obj.symbols.count() as usize]);
         let mut split_obj = ObjInfo::new(
             ObjKind::Relocatable,
             ObjArchitecture::PowerPc,
@@ -1047,7 +1079,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
                     s.section == Some(section_index) && !is_linker_generated_label(&s.name)
                 })
             {
-                if symbol_idxs[symbol_idx].is_some() {
+                if symbol_idxs[symbol_idx as usize].is_some() {
                     continue; // should never happen?
                 }
 
@@ -1060,7 +1092,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
                     continue;
                 }
 
-                symbol_idxs[symbol_idx] = Some(split_obj.symbols.add_direct(ObjSymbol {
+                let new_index = split_obj.symbols.add_direct(ObjSymbol {
                     name: symbol.name.clone(),
                     demangled_name: symbol.demangled_name.clone(),
                     address: if split.common {
@@ -1081,7 +1113,8 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
                     data_kind: symbol.data_kind,
                     name_hash: symbol.name_hash,
                     demangled_name_hash: symbol.demangled_name_hash,
-                })?);
+                })?;
+                symbol_idxs[symbol_idx as usize] = Some(new_index);
             }
 
             // For mwldeppc 2.7 and above, a .comment section is required to link without error
@@ -1124,7 +1157,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
         let symbol_idxs = &mut object_symbols[obj_idx];
         for (_section_index, section) in out_obj.sections.iter_mut() {
             for (reloc_address, reloc) in section.relocations.iter_mut() {
-                match symbol_idxs[reloc.target_symbol] {
+                match symbol_idxs[reloc.target_symbol as usize] {
                     Some(out_sym_idx) => {
                         reloc.target_symbol = out_sym_idx;
                     }
@@ -1157,7 +1190,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
                             globalize_symbols.push((reloc.target_symbol, new_name));
                         }
 
-                        symbol_idxs[reloc.target_symbol] = Some(out_sym_idx);
+                        symbol_idxs[reloc.target_symbol as usize] = Some(out_sym_idx);
                         out_obj.symbols.add_direct(ObjSymbol {
                             name: target_sym.name.clone(),
                             demangled_name: target_sym.demangled_name.clone(),
@@ -1201,7 +1234,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
     // Upgrade local symbols to global if necessary
     for (obj, symbol_map) in objects.iter_mut().zip(&object_symbols) {
         for (globalize_idx, new_name) in &globalize_symbols {
-            if let Some(symbol_idx) = symbol_map[*globalize_idx] {
+            if let Some(symbol_idx) = symbol_map[*globalize_idx as usize] {
                 let mut symbol = obj.symbols[symbol_idx].clone();
                 symbol.name.clone_from(new_name);
                 if symbol.flags.is_local() {
@@ -1216,7 +1249,7 @@ pub fn split_obj(obj: &ObjInfo, module_name: Option<&str>) -> Result<Vec<ObjInfo
     // Extern linker generated symbols
     for obj in &mut objects {
         let mut replace_symbols = vec![];
-        for (symbol_idx, symbol) in obj.symbols.iter().enumerate() {
+        for (symbol_idx, symbol) in obj.symbols.iter() {
             if is_linker_generated_label(&symbol.name) && symbol.section.is_some() {
                 log::debug!("Externing {:?} in {}", symbol, obj.name);
                 replace_symbols.push((symbol_idx, ObjSymbol {
@@ -1320,12 +1353,15 @@ pub fn is_linker_generated_object(name: &str) -> bool {
 }
 
 /// Locate the end address of a section when excluding linker generated objects
-pub fn end_for_section(obj: &ObjInfo, section_index: usize) -> Result<SectionAddress> {
+pub fn end_for_section(obj: &ObjInfo, section_index: SectionIndex) -> Result<SectionAddress> {
     let section = obj
         .sections
         .get(section_index)
         .ok_or_else(|| anyhow!("Invalid section index: {}", section_index))?;
     let mut section_end = (section.address + section.size) as u32;
+    if section.data.is_empty() {
+        return Ok(SectionAddress::new(section_index, section_end));
+    }
     // .ctors and .dtors end with a linker-generated null pointer,
     // adjust section size appropriately
     if matches!(section.name.as_str(), ".ctors" | ".dtors")

src/util/u8_arc.rs

@@ -1,14 +1,15 @@
 use std::{borrow::Cow, ffi::CStr, mem::size_of};
 
 use anyhow::Result;
-use zerocopy::{big_endian::U32, AsBytes, FromBytes, FromZeroes};
+use typed_path::Utf8UnixPath;
+use zerocopy::{big_endian::U32, FromBytes, Immutable, IntoBytes, KnownLayout};
 
-use crate::static_assert;
+use crate::{static_assert, vfs::next_non_empty};
 
 pub const U8_MAGIC: [u8; 4] = [0x55, 0xAA, 0x38, 0x2D];
 
 /// U8 archive header.
-#[derive(Clone, Debug, PartialEq, FromBytes, FromZeroes, AsBytes)]
+#[derive(Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
 #[repr(C, align(4))]
 pub struct U8Header {
     magic: [u8; 4],
@@ -32,7 +33,7 @@ pub enum U8NodeKind {
 }
 
 /// An individual file system node.
-#[derive(Clone, Debug, PartialEq, FromBytes, FromZeroes, AsBytes)]
+#[derive(Copy, Clone, Debug, PartialEq, FromBytes, IntoBytes, Immutable, KnownLayout)]
 #[repr(C, align(4))]
 pub struct U8Node {
     kind: u8,
@@ -91,7 +92,7 @@ pub struct U8View<'a> {
 impl<'a> U8View<'a> {
     /// Create a new U8 view from a buffer.
     pub fn new(buf: &'a [u8]) -> Result<Self, &'static str> {
-        let Some(header) = U8Header::ref_from_prefix(buf) else {
+        let Ok((header, _)) = U8Header::ref_from_prefix(buf) else {
             return Err("Buffer not large enough for U8 header");
         };
         if header.magic != U8_MAGIC {
@@ -101,7 +102,8 @@ impl<'a> U8View<'a> {
         let nodes_buf = buf
             .get(node_table_offset..node_table_offset + header.node_table_size.get() as usize)
             .ok_or("U8 node table out of bounds")?;
-        let root_node = U8Node::ref_from_prefix(nodes_buf).ok_or("U8 root node not aligned")?;
+        let (root_node, _) =
+            U8Node::ref_from_prefix(nodes_buf).map_err(|_| "U8 root node not aligned")?;
         if root_node.kind() != U8NodeKind::Directory {
             return Err("U8 root node is not a directory");
         }
@@ -113,7 +115,8 @@ impl<'a> U8View<'a> {
             return Err("U8 node table size mismatch");
         }
         let (nodes_buf, string_table) = nodes_buf.split_at(node_count * size_of::<U8Node>());
-        let nodes = U8Node::slice_from(nodes_buf).ok_or("U8 node table not aligned")?;
+        let nodes =
+            <[U8Node]>::ref_from_bytes(nodes_buf).map_err(|_| "U8 node table not aligned")?;
         Ok(Self { header, nodes, string_table })
     }
 
@@ -121,7 +124,7 @@ impl<'a> U8View<'a> {
     pub fn iter(&self) -> U8Iter { U8Iter { inner: self, idx: 1 } }
 
     /// Get the name of a node.
-    pub fn get_name(&self, node: &U8Node) -> Result<Cow<str>, String> {
+    pub fn get_name(&self, node: U8Node) -> Result<Cow<str>, String> {
         let name_buf = self.string_table.get(node.name_offset() as usize..).ok_or_else(|| {
             format!(
                 "U8: name offset {} out of bounds (string table size: {})",
@@ -136,22 +139,29 @@ impl<'a> U8View<'a> {
     }
 
     /// Finds a particular file or directory by path.
-    pub fn find(&self, path: &str) -> Option<(usize, &U8Node)> {
-        let mut split = path.trim_matches('/').split('/');
-        let mut current = split.next()?;
+    pub fn find(&self, path: &Utf8UnixPath) -> Option<(usize, U8Node)> {
+        let mut split = path.as_str().split('/');
+        let mut current = next_non_empty(&mut split);
+        if current.is_empty() {
+            return Some((0, self.nodes[0]));
+        }
+
         let mut idx = 1;
         let mut stop_at = None;
-        while let Some(node) = self.nodes.get(idx) {
-            if self.get_name(node).as_ref().map_or(false, |name| name.eq_ignore_ascii_case(current))
-            {
-                if let Some(next) = split.next() {
-                    current = next;
-                } else {
+        while let Some(node) = self.nodes.get(idx).copied() {
+            if self.get_name(node).map_or(false, |name| name.eq_ignore_ascii_case(current)) {
+                current = next_non_empty(&mut split);
+                if current.is_empty() {
                     return Some((idx, node));
                 }
+                if node.is_dir() {
                     // Descend into directory
                     idx += 1;
                     stop_at = Some(node.length() as usize + idx);
+                } else {
+                    // Not a directory
+                    break;
+                }
             } else if node.is_dir() {
                 // Skip directory
                 idx = node.length() as usize;
@@ -176,11 +186,11 @@ pub struct U8Iter<'a> {
 }
 
 impl<'a> Iterator for U8Iter<'a> {
-    type Item = (usize, &'a U8Node, Result<Cow<'a, str>, String>);
+    type Item = (usize, U8Node, Result<Cow<'a, str>, String>);
 
     fn next(&mut self) -> Option<Self::Item> {
         let idx = self.idx;
-        let node = self.inner.nodes.get(idx)?;
+        let node = self.inner.nodes.get(idx).copied()?;
         let name = self.inner.get_name(node);
         self.idx += 1;
         Some((idx, node, name))

src/vfs/common.rs

@@ -0,0 +1,130 @@
+use std::{
+    io,
+    io::{BufRead, Cursor, Read, Seek, SeekFrom},
+    sync::Arc,
+};
+
+use filetime::FileTime;
+
+use super::{DiscStream, VfsFileType, VfsMetadata};
+use crate::vfs::VfsFile;
+
+#[derive(Clone)]
+pub struct StaticFile {
+    inner: Cursor<Arc<[u8]>>,
+    mtime: Option<FileTime>,
+}
+
+impl StaticFile {
+    pub fn new(data: Arc<[u8]>, mtime: Option<FileTime>) -> Self {
+        Self { inner: Cursor::new(data), mtime }
+    }
+}
+
+impl BufRead for StaticFile {
+    fn fill_buf(&mut self) -> io::Result<&[u8]> { self.inner.fill_buf() }
+
+    fn consume(&mut self, amt: usize) { self.inner.consume(amt) }
+}
+
+impl Read for StaticFile {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.inner.read(buf) }
+}
+
+impl Seek for StaticFile {
+    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { self.inner.seek(pos) }
+}
+
+impl VfsFile for StaticFile {
+    fn map(&mut self) -> io::Result<&[u8]> { Ok(self.inner.get_ref()) }
+
+    fn metadata(&mut self) -> io::Result<VfsMetadata> {
+        Ok(VfsMetadata {
+            file_type: VfsFileType::File,
+            len: self.inner.get_ref().len() as u64,
+            mtime: self.mtime,
+        })
+    }
+
+    fn into_disc_stream(self: Box<Self>) -> Box<dyn DiscStream> { self }
+}
+
+#[derive(Clone)]
+pub struct WindowedFile {
+    base: Box<dyn VfsFile>,
+    pos: u64,
+    begin: u64,
+    end: u64,
+}
+
+impl WindowedFile {
+    pub fn new(mut base: Box<dyn VfsFile>, offset: u64, size: u64) -> io::Result<Self> {
+        base.seek(SeekFrom::Start(offset))?;
+        Ok(Self { base, pos: offset, begin: offset, end: offset + size })
+    }
+
+    #[inline]
+    pub fn len(&self) -> u64 { self.end - self.begin }
+}
+
+impl BufRead for WindowedFile {
+    fn fill_buf(&mut self) -> io::Result<&[u8]> {
+        let buf = self.base.fill_buf()?;
+        let remaining = self.end.saturating_sub(self.pos);
+        Ok(&buf[..buf.len().min(remaining as usize)])
+    }
+
+    fn consume(&mut self, amt: usize) {
+        let remaining = self.end.saturating_sub(self.pos);
+        let amt = amt.min(remaining as usize);
+        self.base.consume(amt);
+        self.pos += amt as u64;
+    }
+}
+
+impl Read for WindowedFile {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let remaining = self.end.saturating_sub(self.pos);
+        if remaining == 0 {
+            return Ok(0);
+        }
+        let len = buf.len().min(remaining as usize);
+        self.base.read(&mut buf[..len])
+    }
+}
+
+impl Seek for WindowedFile {
+    #[inline]
+    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
+        let mut pos = match pos {
+            SeekFrom::Start(p) => self.begin + p,
+            SeekFrom::End(p) => self.end.saturating_add_signed(p),
+            SeekFrom::Current(p) => self.pos.saturating_add_signed(p),
+        };
+        if pos < self.begin {
+            pos = self.begin;
+        } else if pos > self.end {
+            pos = self.end;
+        }
+        let result = self.base.seek(SeekFrom::Start(pos))?;
+        self.pos = result;
+        Ok(result - self.begin)
+    }
+
+    #[inline]
+    fn stream_position(&mut self) -> io::Result<u64> { Ok(self.pos) }
+}
+
+impl VfsFile for WindowedFile {
+    fn map(&mut self) -> io::Result<&[u8]> {
+        let buf = self.base.map()?;
+        Ok(&buf[self.pos as usize..self.end as usize])
+    }
+
+    fn metadata(&mut self) -> io::Result<VfsMetadata> {
+        let metadata = self.base.metadata()?;
+        Ok(VfsMetadata { file_type: VfsFileType::File, len: self.len(), mtime: metadata.mtime })
+    }
+
+    fn into_disc_stream(self: Box<Self>) -> Box<dyn DiscStream> { self }
+}

src/vfs/disc.rs

@@ -0,0 +1,337 @@
+use std::{
+    io,
+    io::{BufRead, Cursor, Read, Seek, SeekFrom},
+    sync::Arc,
+};
+
+use filetime::FileTime;
+use nodtool::{
+    nod,
+    nod::{Disc, DiscStream, Fst, NodeKind, OwnedFileStream, PartitionBase, PartitionMeta},
+};
+use typed_path::Utf8UnixPath;
+use zerocopy::IntoBytes;
+
+use super::{
+    next_non_empty, StaticFile, Vfs, VfsError, VfsFile, VfsFileType, VfsMetadata, VfsResult,
+};
+
+#[derive(Clone)]
+pub struct DiscFs {
+    disc: Arc<Disc>,
+    base: Box<dyn PartitionBase>,
+    meta: Box<PartitionMeta>,
+    mtime: Option<FileTime>,
+}
+
+enum SpecialDir {
+    Root,
+    Sys,
+    Disc,
+}
+
+enum DiscNode<'a> {
+    None,
+    Special(SpecialDir),
+    Node(Fst<'a>, usize, nod::Node),
+    Static(&'a [u8]),
+}
+
+impl DiscFs {
+    pub fn new(
+        disc: Arc<Disc>,
+        mut base: Box<dyn PartitionBase>,
+        mtime: Option<FileTime>,
+    ) -> io::Result<Self> {
+        let meta = base.meta().map_err(nod_to_io_error)?;
+        Ok(Self { disc, base, meta, mtime })
+    }
+
+    fn find(&self, path: &Utf8UnixPath) -> VfsResult<DiscNode> {
+        let path = path.as_str().trim_matches('/');
+        let mut split = path.split('/');
+        let mut segment = next_non_empty(&mut split);
+        match segment.to_ascii_lowercase().as_str() {
+            "" => Ok(DiscNode::Special(SpecialDir::Root)),
+            "files" => {
+                let fst = Fst::new(&self.meta.raw_fst)?;
+                if next_non_empty(&mut split).is_empty() {
+                    let root = fst.nodes[0];
+                    return Ok(DiscNode::Node(fst, 0, root));
+                }
+                let remainder = &path[segment.len() + 1..];
+                match fst.find(remainder) {
+                    Some((idx, node)) => Ok(DiscNode::Node(fst, idx, node)),
+                    None => Ok(DiscNode::None),
+                }
+            }
+            "sys" => {
+                segment = next_non_empty(&mut split);
+                // No directories in sys
+                if !next_non_empty(&mut split).is_empty() {
+                    return Ok(DiscNode::None);
+                }
+                match segment.to_ascii_lowercase().as_str() {
+                    "" => Ok(DiscNode::Special(SpecialDir::Sys)),
+                    "boot.bin" => Ok(DiscNode::Static(self.meta.raw_boot.as_slice())),
+                    "bi2.bin" => Ok(DiscNode::Static(self.meta.raw_bi2.as_slice())),
+                    "apploader.img" => Ok(DiscNode::Static(self.meta.raw_apploader.as_ref())),
+                    "fst.bin" => Ok(DiscNode::Static(self.meta.raw_fst.as_ref())),
+                    "main.dol" => Ok(DiscNode::Static(self.meta.raw_dol.as_ref())),
+                    _ => Ok(DiscNode::None),
+                }
+            }
+            "disc" => {
+                if !self.disc.header().is_wii() {
+                    return Ok(DiscNode::None);
+                }
+                segment = next_non_empty(&mut split);
+                // No directories in disc
+                if !next_non_empty(&mut split).is_empty() {
+                    return Ok(DiscNode::None);
+                }
+                match segment.to_ascii_lowercase().as_str() {
+                    "" => Ok(DiscNode::Special(SpecialDir::Disc)),
+                    "header.bin" => Ok(DiscNode::Static(&self.disc.header().as_bytes()[..0x100])),
+                    "region.bin" => {
+                        Ok(DiscNode::Static(self.disc.region().ok_or(VfsError::NotFound)?))
+                    }
+                    _ => Ok(DiscNode::None),
+                }
+            }
+            "ticket.bin" => {
+                Ok(DiscNode::Static(self.meta.raw_ticket.as_deref().ok_or(VfsError::NotFound)?))
+            }
+            "tmd.bin" => {
+                Ok(DiscNode::Static(self.meta.raw_tmd.as_deref().ok_or(VfsError::NotFound)?))
+            }
+            "cert.bin" => {
+                Ok(DiscNode::Static(self.meta.raw_cert_chain.as_deref().ok_or(VfsError::NotFound)?))
+            }
+            "h3.bin" => {
+                Ok(DiscNode::Static(self.meta.raw_h3_table.as_deref().ok_or(VfsError::NotFound)?))
+            }
+            _ => Ok(DiscNode::None),
+        }
+    }
+}
+
+impl Vfs for DiscFs {
+    fn open(&mut self, path: &Utf8UnixPath) -> VfsResult<Box<dyn VfsFile>> {
+        match self.find(path)? {
+            DiscNode::None => Err(VfsError::NotFound),
+            DiscNode::Special(_) => Err(VfsError::IsADirectory),
+            DiscNode::Node(_, _, node) => match node.kind() {
+                NodeKind::File => {
+                    if node.length() > 2048 {
+                        let file = self.base.clone().into_open_file(node)?;
+                        Ok(Box::new(DiscFile::new(file, self.mtime)))
+                    } else {
+                        let len = node.length() as usize;
+                        let mut file = self.base.open_file(node)?;
+                        let mut data = vec![0u8; len];
+                        file.read_exact(&mut data)?;
+                        Ok(Box::new(StaticFile::new(Arc::from(data.as_slice()), self.mtime)))
+                    }
+                }
+                NodeKind::Directory => Err(VfsError::IsADirectory),
+                NodeKind::Invalid => Err(VfsError::from("FST: Invalid node kind")),
+            },
+            DiscNode::Static(data) => Ok(Box::new(StaticFile::new(Arc::from(data), self.mtime))),
+        }
+    }
+
+    fn exists(&mut self, path: &Utf8UnixPath) -> VfsResult<bool> {
+        Ok(!matches!(self.find(path)?, DiscNode::None))
+    }
+
+    fn read_dir(&mut self, path: &Utf8UnixPath) -> VfsResult<Vec<String>> {
+        match self.find(path)? {
+            DiscNode::None => Err(VfsError::NotFound),
+            DiscNode::Special(SpecialDir::Root) => {
+                let mut entries = vec!["files".to_string(), "sys".to_string()];
+                if self.disc.header().is_wii() {
+                    entries.push("disc".to_string());
+                }
+                if self.meta.raw_cert_chain.is_some() {
+                    entries.push("cert.bin".to_string());
+                }
+                if self.meta.raw_h3_table.is_some() {
+                    entries.push("h3.bin".to_string());
+                }
+                if self.meta.raw_ticket.is_some() {
+                    entries.push("ticket.bin".to_string());
+                }
+                if self.meta.raw_tmd.is_some() {
+                    entries.push("tmd.bin".to_string());
+                }
+                Ok(entries)
+            }
+            DiscNode::Special(SpecialDir::Sys) => Ok(vec![
+                "boot.bin".to_string(),
+                "bi2.bin".to_string(),
+                "apploader.img".to_string(),
+                "fst.bin".to_string(),
+                "main.dol".to_string(),
+            ]),
+            DiscNode::Special(SpecialDir::Disc) => {
+                let mut entries = Vec::new();
+                if self.disc.header().is_wii() {
+                    entries.push("header.bin".to_string());
+                    if self.disc.region().is_some() {
+                        entries.push("region.bin".to_string());
+                    }
+                }
+                Ok(entries)
+            }
+            DiscNode::Node(fst, idx, node) => {
+                match node.kind() {
+                    NodeKind::File => return Err(VfsError::NotADirectory),
+                    NodeKind::Directory => {}
+                    NodeKind::Invalid => return Err(VfsError::from("FST: Invalid node kind")),
+                }
+                let mut entries = Vec::new();
+                let mut idx = idx + 1;
+                let end = node.length() as usize;
+                while idx < end {
+                    let child = fst
+                        .nodes
+                        .get(idx)
+                        .copied()
+                        .ok_or_else(|| VfsError::from("FST: Node index out of bounds"))?;
+                    entries.push(fst.get_name(child)?.to_string());
+                    if child.is_dir() {
+                        idx = child.length() as usize;
+                    } else {
+                        idx += 1;
+                    }
+                }
+                Ok(entries)
+            }
+            DiscNode::Static(_) => Err(VfsError::NotADirectory),
+        }
+    }
+
+    fn metadata(&mut self, path: &Utf8UnixPath) -> VfsResult<VfsMetadata> {
+        match self.find(path)? {
+            DiscNode::None => Err(VfsError::NotFound),
+            DiscNode::Special(_) => {
+                Ok(VfsMetadata { file_type: VfsFileType::Directory, len: 0, mtime: self.mtime })
+            }
+            DiscNode::Node(_, _, node) => {
+                let (file_type, len) = match node.kind() {
+                    NodeKind::File => (VfsFileType::File, node.length()),
+                    NodeKind::Directory => (VfsFileType::Directory, 0),
+                    NodeKind::Invalid => return Err(VfsError::from("FST: Invalid node kind")),
+                };
+                Ok(VfsMetadata { file_type, len, mtime: self.mtime })
+            }
+            DiscNode::Static(data) => Ok(VfsMetadata {
+                file_type: VfsFileType::File,
+                len: data.len() as u64,
+                mtime: self.mtime,
+            }),
+        }
+    }
+}
+
+#[derive(Clone)]
+enum DiscFileInner {
+    Stream(OwnedFileStream),
+    Mapped(Cursor<Arc<[u8]>>),
+}
+
+#[derive(Clone)]
+struct DiscFile {
+    inner: DiscFileInner,
+    mtime: Option<FileTime>,
+}
+
+impl DiscFile {
+    pub fn new(file: OwnedFileStream, mtime: Option<FileTime>) -> Self {
+        Self { inner: DiscFileInner::Stream(file), mtime }
+    }
+
+    fn convert_to_mapped(&mut self) {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => {
+                let pos = stream.stream_position().unwrap();
+                stream.seek(SeekFrom::Start(0)).unwrap();
+                let mut data = vec![0u8; stream.len() as usize];
+                stream.read_exact(&mut data).unwrap();
+                let mut cursor = Cursor::new(Arc::from(data.as_slice()));
+                cursor.set_position(pos);
+                self.inner = DiscFileInner::Mapped(cursor);
+            }
+            DiscFileInner::Mapped(_) => {}
+        };
+    }
+}
+
+impl BufRead for DiscFile {
+    fn fill_buf(&mut self) -> io::Result<&[u8]> {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => stream.fill_buf(),
+            DiscFileInner::Mapped(data) => data.fill_buf(),
+        }
+    }
+
+    fn consume(&mut self, amt: usize) {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => stream.consume(amt),
+            DiscFileInner::Mapped(data) => data.consume(amt),
+        }
+    }
+}
+
+impl Read for DiscFile {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => stream.read(buf),
+            DiscFileInner::Mapped(data) => data.read(buf),
+        }
+    }
+}
+
+impl Seek for DiscFile {
+    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => stream.seek(pos),
+            DiscFileInner::Mapped(data) => data.seek(pos),
+        }
+    }
+}
+
+impl VfsFile for DiscFile {
+    fn map(&mut self) -> io::Result<&[u8]> {
+        self.convert_to_mapped();
+        match &mut self.inner {
+            DiscFileInner::Stream(_) => unreachable!(),
+            DiscFileInner::Mapped(data) => Ok(data.get_ref()),
+        }
+    }
+
+    fn metadata(&mut self) -> io::Result<VfsMetadata> {
+        match &mut self.inner {
+            DiscFileInner::Stream(stream) => Ok(VfsMetadata {
+                file_type: VfsFileType::File,
+                len: stream.len(),
+                mtime: self.mtime,
+            }),
+            DiscFileInner::Mapped(data) => Ok(VfsMetadata {
+                file_type: VfsFileType::File,
+                len: data.get_ref().len() as u64,
+                mtime: self.mtime,
+            }),
+        }
+    }
+
+    fn into_disc_stream(self: Box<Self>) -> Box<dyn DiscStream> { self }
+}
+
+pub fn nod_to_io_error(e: nod::Error) -> io::Error {
+    match e {
+        nod::Error::Io(msg, e) => io::Error::new(e.kind(), format!("{}: {}", msg, e)),
+        e => io::Error::new(io::ErrorKind::InvalidData, e),
+    }
+}

src/vfs/mod.rs

@@ -0,0 +1,373 @@
+mod common;
+mod disc;
+mod rarc;
+mod std_fs;
+mod u8_arc;
+
+use std::{
+    error::Error,
+    fmt::{Debug, Display, Formatter},
+    io,
+    io::{BufRead, Read, Seek, SeekFrom},
+    sync::Arc,
+};
+
+use anyhow::{anyhow, Context};
+use common::{StaticFile, WindowedFile};
+use disc::{nod_to_io_error, DiscFs};
+use dyn_clone::DynClone;
+use filetime::FileTime;
+use nodtool::{nod, nod::DiscStream};
+use rarc::RarcFs;
+pub use std_fs::StdFs;
+use typed_path::{Utf8NativePath, Utf8UnixPath, Utf8UnixPathBuf};
+use u8_arc::U8Fs;
+
+use crate::util::{
+    ncompress::{YAY0_MAGIC, YAZ0_MAGIC},
+    nlzss,
+    rarc::RARC_MAGIC,
+    u8_arc::U8_MAGIC,
+};
+
+pub trait Vfs: DynClone + Send + Sync {
+    fn open(&mut self, path: &Utf8UnixPath) -> VfsResult<Box<dyn VfsFile>>;
+
+    fn exists(&mut self, path: &Utf8UnixPath) -> VfsResult<bool>;
+
+    fn read_dir(&mut self, path: &Utf8UnixPath) -> VfsResult<Vec<String>>;
+
+    fn metadata(&mut self, path: &Utf8UnixPath) -> VfsResult<VfsMetadata>;
+}
+
+dyn_clone::clone_trait_object!(Vfs);
+
+pub trait VfsFile: DiscStream + BufRead {
+    fn map(&mut self) -> io::Result<&[u8]>;
+
+    fn metadata(&mut self) -> io::Result<VfsMetadata>;
+
+    fn into_disc_stream(self: Box<Self>) -> Box<dyn DiscStream>;
+}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+pub enum VfsFileType {
+    File,
+    Directory,
+}
+
+pub struct VfsMetadata {
+    pub file_type: VfsFileType,
+    pub len: u64,
+    pub mtime: Option<FileTime>,
+}
+
+impl VfsMetadata {
+    pub fn is_file(&self) -> bool { self.file_type == VfsFileType::File }
+
+    pub fn is_dir(&self) -> bool { self.file_type == VfsFileType::Directory }
+}
+
+dyn_clone::clone_trait_object!(VfsFile);
+
+#[derive(Debug)]
+pub enum VfsError {
+    NotFound,
+    NotADirectory,
+    IsADirectory,
+    IoError(io::Error),
+    Other(String),
+}
+
+pub type VfsResult<T, E = VfsError> = Result<T, E>;
+
+impl From<io::Error> for VfsError {
+    fn from(e: io::Error) -> Self {
+        match e.kind() {
+            io::ErrorKind::NotFound => VfsError::NotFound,
+            // TODO: stabilized in Rust 1.83
+            // io::ErrorKind::NotADirectory => VfsError::NotADirectory,
+            // io::ErrorKind::IsADirectory => VfsError::IsADirectory,
+            _ => VfsError::IoError(e),
+        }
+    }
+}
+
+impl From<String> for VfsError {
+    fn from(e: String) -> Self { VfsError::Other(e) }
+}
+
+impl From<&str> for VfsError {
+    fn from(e: &str) -> Self { VfsError::Other(e.to_string()) }
+}
+
+impl Display for VfsError {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            VfsError::NotFound => write!(f, "File or directory not found"),
+            VfsError::IoError(e) => write!(f, "{}", e),
+            VfsError::Other(e) => write!(f, "{}", e),
+            VfsError::NotADirectory => write!(f, "Path is a file, not a directory"),
+            VfsError::IsADirectory => write!(f, "Path is a directory, not a file"),
+        }
+    }
+}
+
+impl Error for VfsError {}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum FileFormat {
+    Regular,
+    Compressed(CompressionKind),
+    Archive(ArchiveKind),
+}
+
+impl Display for FileFormat {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            FileFormat::Regular => write!(f, "File"),
+            FileFormat::Compressed(kind) => write!(f, "Compressed: {}", kind),
+            FileFormat::Archive(kind) => write!(f, "Archive: {}", kind),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum CompressionKind {
+    Yay0,
+    Yaz0,
+    Nlzss,
+}
+
+impl Display for CompressionKind {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            CompressionKind::Yay0 => write!(f, "Yay0"),
+            CompressionKind::Yaz0 => write!(f, "Yaz0"),
+            CompressionKind::Nlzss => write!(f, "NLZSS"),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
+pub enum ArchiveKind {
+    Rarc,
+    U8,
+    Disc(nod::Format),
+}
+
+impl Display for ArchiveKind {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            ArchiveKind::Rarc => write!(f, "RARC"),
+            ArchiveKind::U8 => write!(f, "U8"),
+            ArchiveKind::Disc(format) => write!(f, "Disc ({})", format),
+        }
+    }
+}
+
+pub fn detect<R>(file: &mut R) -> io::Result<FileFormat>
+where R: Read + Seek + ?Sized {
+    file.seek(SeekFrom::Start(0))?;
+    let mut magic = [0u8; 4];
+    match file.read_exact(&mut magic) {
+        Ok(_) => {}
+        Err(e) if e.kind() == io::ErrorKind::UnexpectedEof => return Ok(FileFormat::Regular),
+        Err(e) => return Err(e),
+    }
+    file.seek_relative(-4)?;
+    match magic {
+        YAY0_MAGIC => Ok(FileFormat::Compressed(CompressionKind::Yay0)),
+        YAZ0_MAGIC => Ok(FileFormat::Compressed(CompressionKind::Yaz0)),
+        RARC_MAGIC => Ok(FileFormat::Archive(ArchiveKind::Rarc)),
+        U8_MAGIC => Ok(FileFormat::Archive(ArchiveKind::U8)),
+        _ => {
+            let format = nod::Disc::detect(file)?;
+            file.seek(SeekFrom::Start(0))?;
+            match format {
+                Some(format) => Ok(FileFormat::Archive(ArchiveKind::Disc(format))),
+                None => Ok(FileFormat::Regular),
+            }
+        }
+    }
+}
+
+pub enum OpenResult {
+    File(Box<dyn VfsFile>, Utf8UnixPathBuf),
+    Directory(Box<dyn Vfs>, Utf8UnixPathBuf),
+}
+
+pub fn open_path(path: &Utf8NativePath, auto_decompress: bool) -> anyhow::Result<OpenResult> {
+    open_path_with_fs(Box::new(StdFs), path, auto_decompress)
+}
+
+pub fn open_path_with_fs(
+    mut fs: Box<dyn Vfs>,
+    path: &Utf8NativePath,
+    auto_decompress: bool,
+) -> anyhow::Result<OpenResult> {
+    let path = path.with_unix_encoding();
+    let mut split = path.as_str().split(':').peekable();
+    let mut current_path = String::new();
+    let mut file: Option<Box<dyn VfsFile>> = None;
+    let mut segment = Utf8UnixPath::new("");
+    loop {
+        // Open the next segment if necessary
+        if file.is_none() {
+            segment = Utf8UnixPath::new(split.next().unwrap());
+            if !current_path.is_empty() {
+                current_path.push(':');
+            }
+            current_path.push_str(segment.as_str());
+            let file_type = match fs.metadata(segment) {
+                Ok(metadata) => metadata.file_type,
+                Err(VfsError::NotFound) => return Err(anyhow!("{} not found", current_path)),
+                Err(e) => return Err(e).context(format!("Failed to open {}", current_path)),
+            };
+            match file_type {
+                VfsFileType::File => {
+                    file = Some(
+                        fs.open(segment)
+                            .with_context(|| format!("Failed to open {}", current_path))?,
+                    );
+                }
+                VfsFileType::Directory => {
+                    return if split.peek().is_some() {
+                        Err(anyhow!("{} is not a file", current_path))
+                    } else {
+                        Ok(OpenResult::Directory(fs, segment.to_path_buf()))
+                    }
+                }
+            }
+        }
+        let mut current_file = file.take().unwrap();
+        let format = detect(current_file.as_mut())
+            .with_context(|| format!("Failed to detect file type for {}", current_path))?;
+        if let Some(&next) = split.peek() {
+            match next {
+                "nlzss" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Nlzss)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with NLZSS", current_path)
+                            })?,
+                    );
+                }
+                "yay0" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Yay0)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with Yay0", current_path)
+                            })?,
+                    );
+                }
+                "yaz0" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Yaz0)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with Yaz0", current_path)
+                            })?,
+                    );
+                }
+                _ => match format {
+                    FileFormat::Regular => {
+                        return Err(anyhow!("{} is not an archive", current_path))
+                    }
+                    FileFormat::Compressed(kind) => {
+                        file =
+                            Some(decompress_file(current_file.as_mut(), kind).with_context(
+                                || format!("Failed to decompress {}", current_path),
+                            )?);
+                        // Continue the loop to detect the new format
+                    }
+                    FileFormat::Archive(kind) => {
+                        fs = open_fs(current_file, kind).with_context(|| {
+                            format!("Failed to open container {}", current_path)
+                        })?;
+                        // Continue the loop to open the next segment
+                    }
+                },
+            }
+        } else {
+            // No more segments, return as-is
+            return match format {
+                FileFormat::Compressed(kind) if auto_decompress => Ok(OpenResult::File(
+                    decompress_file(current_file.as_mut(), kind)
+                        .with_context(|| format!("Failed to decompress {}", current_path))?,
+                    segment.to_path_buf(),
+                )),
+                _ => Ok(OpenResult::File(current_file, segment.to_path_buf())),
+            };
+        }
+    }
+}
+
+pub fn open_file(path: &Utf8NativePath, auto_decompress: bool) -> anyhow::Result<Box<dyn VfsFile>> {
+    open_file_with_fs(Box::new(StdFs), path, auto_decompress)
+}
+
+pub fn open_file_with_fs(
+    fs: Box<dyn Vfs>,
+    path: &Utf8NativePath,
+    auto_decompress: bool,
+) -> anyhow::Result<Box<dyn VfsFile>> {
+    match open_path_with_fs(fs, path, auto_decompress)? {
+        OpenResult::File(file, _) => Ok(file),
+        OpenResult::Directory(_, _) => Err(VfsError::IsADirectory.into()),
+    }
+}
+
+pub fn open_fs(mut file: Box<dyn VfsFile>, kind: ArchiveKind) -> io::Result<Box<dyn Vfs>> {
+    let metadata = file.metadata()?;
+    match kind {
+        ArchiveKind::Rarc => Ok(Box::new(RarcFs::new(file)?)),
+        ArchiveKind::U8 => Ok(Box::new(U8Fs::new(file)?)),
+        ArchiveKind::Disc(_) => {
+            let disc =
+                Arc::new(nod::Disc::new_stream(file.into_disc_stream()).map_err(nod_to_io_error)?);
+            let partition =
+                disc.open_partition_kind(nod::PartitionKind::Data).map_err(nod_to_io_error)?;
+            Ok(Box::new(DiscFs::new(disc, partition, metadata.mtime)?))
+        }
+    }
+}
+
+pub fn decompress_file(
+    file: &mut dyn VfsFile,
+    kind: CompressionKind,
+) -> io::Result<Box<dyn VfsFile>> {
+    let metadata = file.metadata()?;
+    match kind {
+        CompressionKind::Yay0 => {
+            let data = file.map()?;
+            let result = orthrus_ncompress::yay0::Yay0::decompress_from(data)
+                .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
+            Ok(Box::new(StaticFile::new(Arc::from(result), metadata.mtime)))
+        }
+        CompressionKind::Yaz0 => {
+            let data = file.map()?;
+            let result = orthrus_ncompress::yaz0::Yaz0::decompress_from(data)
+                .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
+            Ok(Box::new(StaticFile::new(Arc::from(result), metadata.mtime)))
+        }
+        CompressionKind::Nlzss => {
+            let result = nlzss::decompress(file)
+                .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
+            Ok(Box::new(StaticFile::new(Arc::from(result.as_slice()), metadata.mtime)))
+        }
+    }
+}
+
+#[inline]
+pub fn next_non_empty<'a>(iter: &mut impl Iterator<Item = &'a str>) -> &'a str {
+    loop {
+        match iter.next() {
+            Some("") => continue,
+            Some(next) => break next,
+            None => break "",
+        }
+    }
+}

src/vfs/rarc.rs

@@ -0,0 +1,78 @@
+use std::io;
+
+use typed_path::Utf8UnixPath;
+
+use super::{Vfs, VfsError, VfsFile, VfsFileType, VfsMetadata, VfsResult, WindowedFile};
+use crate::util::rarc::{RarcNodeKind, RarcView};
+
+#[derive(Clone)]
+pub struct RarcFs {
+    file: Box<dyn VfsFile>,
+}
+
+impl RarcFs {
+    pub fn new(file: Box<dyn VfsFile>) -> io::Result<Self> { Ok(Self { file }) }
+
+    fn view(&mut self) -> io::Result<RarcView> {
+        let data = self.file.map()?;
+        RarcView::new(data).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
+    }
+}
+
+impl Vfs for RarcFs {
+    fn open(&mut self, path: &Utf8UnixPath) -> VfsResult<Box<dyn VfsFile>> {
+        let view = self.view()?;
+        match view.find(path) {
+            Some(RarcNodeKind::File(_, node)) => {
+                let offset = view.header.header_len() as u64
+                    + view.header.data_offset() as u64
+                    + node.data_offset() as u64;
+                let len = node.data_length() as u64;
+                let file = WindowedFile::new(self.file.clone(), offset, len)?;
+                Ok(Box::new(file))
+            }
+            Some(RarcNodeKind::Directory(_, _)) => Err(VfsError::IsADirectory),
+            None => Err(VfsError::NotFound),
+        }
+    }
+
+    fn exists(&mut self, path: &Utf8UnixPath) -> VfsResult<bool> {
+        let view = self.view()?;
+        Ok(view.find(path).is_some())
+    }
+
+    fn read_dir(&mut self, path: &Utf8UnixPath) -> VfsResult<Vec<String>> {
+        let view = self.view()?;
+        match view.find(path) {
+            Some(RarcNodeKind::Directory(_, dir)) => {
+                let mut entries = Vec::new();
+                for node in view.children(dir) {
+                    let name = view.get_string(node.name_offset())?;
+                    if name == "." || name == ".." {
+                        continue;
+                    }
+                    entries.push(name.to_string());
+                }
+                Ok(entries)
+            }
+            Some(RarcNodeKind::File(_, _)) => Err(VfsError::NotADirectory),
+            None => Err(VfsError::NotFound),
+        }
+    }
+
+    fn metadata(&mut self, path: &Utf8UnixPath) -> VfsResult<VfsMetadata> {
+        let metadata = self.file.metadata()?;
+        let view = self.view()?;
+        match view.find(path) {
+            Some(RarcNodeKind::File(_, node)) => Ok(VfsMetadata {
+                file_type: VfsFileType::File,
+                len: node.data_length() as u64,
+                mtime: metadata.mtime,
+            }),
+            Some(RarcNodeKind::Directory(_, _)) => {
+                Ok(VfsMetadata { file_type: VfsFileType::Directory, len: 0, mtime: metadata.mtime })
+            }
+            None => Err(VfsError::NotFound),
+        }
+    }
+}

src/vfs/std_fs.rs

@@ -0,0 +1,108 @@
+use std::{
+    fs, io,
+    io::{BufRead, BufReader, Read, Seek, SeekFrom},
+};
+
+use filetime::FileTime;
+use typed_path::{Utf8NativePathBuf, Utf8UnixPath};
+
+use super::{DiscStream, Vfs, VfsFile, VfsFileType, VfsMetadata, VfsResult};
+
+#[derive(Clone)]
+pub struct StdFs;
+
+impl Vfs for StdFs {
+    fn open(&mut self, path: &Utf8UnixPath) -> VfsResult<Box<dyn VfsFile>> {
+        let mut file = StdFile::new(path.with_encoding());
+        file.file()?; // Open the file now to check for errors
+        Ok(Box::new(file))
+    }
+
+    fn exists(&mut self, path: &Utf8UnixPath) -> VfsResult<bool> {
+        Ok(fs::exists(path.with_encoding())?)
+    }
+
+    fn read_dir(&mut self, path: &Utf8UnixPath) -> VfsResult<Vec<String>> {
+        let entries = fs::read_dir(path.with_encoding())?
+            .map(|entry| entry.map(|e| e.file_name().to_string_lossy().into_owned()))
+            .collect::<Result<Vec<_>, _>>()?;
+        Ok(entries)
+    }
+
+    fn metadata(&mut self, path: &Utf8UnixPath) -> VfsResult<VfsMetadata> {
+        let metadata = fs::metadata(path.with_encoding())?;
+        Ok(VfsMetadata {
+            file_type: if metadata.is_dir() { VfsFileType::Directory } else { VfsFileType::File },
+            len: metadata.len(),
+            mtime: Some(FileTime::from_last_modification_time(&metadata)),
+        })
+    }
+}
+
+pub struct StdFile {
+    path: Utf8NativePathBuf,
+    file: Option<BufReader<fs::File>>,
+    mmap: Option<memmap2::Mmap>,
+}
+
+impl Clone for StdFile {
+    #[inline]
+    fn clone(&self) -> Self { Self { path: self.path.clone(), file: None, mmap: None } }
+}
+
+impl StdFile {
+    #[inline]
+    pub fn new(path: Utf8NativePathBuf) -> Self { StdFile { path, file: None, mmap: None } }
+
+    pub fn file(&mut self) -> io::Result<&mut BufReader<fs::File>> {
+        if self.file.is_none() {
+            self.file = Some(BufReader::new(fs::File::open(&self.path)?));
+        }
+        Ok(self.file.as_mut().unwrap())
+    }
+}
+
+impl BufRead for StdFile {
+    #[inline]
+    fn fill_buf(&mut self) -> io::Result<&[u8]> { self.file()?.fill_buf() }
+
+    #[inline]
+    fn consume(&mut self, amt: usize) {
+        if let Ok(file) = self.file() {
+            file.consume(amt);
+        }
+    }
+}
+
+impl Read for StdFile {
+    #[inline]
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.file()?.read(buf) }
+}
+
+impl Seek for StdFile {
+    #[inline]
+    fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> { self.file()?.seek(pos) }
+}
+
+impl VfsFile for StdFile {
+    fn map(&mut self) -> io::Result<&[u8]> {
+        if self.file.is_none() {
+            self.file = Some(BufReader::new(fs::File::open(&self.path)?));
+        }
+        if self.mmap.is_none() {
+            self.mmap = Some(unsafe { memmap2::Mmap::map(self.file.as_ref().unwrap().get_ref())? });
+        }
+        Ok(self.mmap.as_ref().unwrap())
+    }
+
+    fn metadata(&mut self) -> io::Result<VfsMetadata> {
+        let metadata = fs::metadata(&self.path)?;
+        Ok(VfsMetadata {
+            file_type: if metadata.is_dir() { VfsFileType::Directory } else { VfsFileType::File },
+            len: metadata.len(),
+            mtime: Some(FileTime::from_last_modification_time(&metadata)),
+        })
+    }
+
+    fn into_disc_stream(self: Box<Self>) -> Box<dyn DiscStream> { self }
+}

src/vfs/u8_arc.rs

@@ -0,0 +1,91 @@
+use std::io;
+
+use typed_path::Utf8UnixPath;
+
+use super::{Vfs, VfsError, VfsFile, VfsFileType, VfsMetadata, VfsResult, WindowedFile};
+use crate::util::u8_arc::{U8NodeKind, U8View};
+
+#[derive(Clone)]
+pub struct U8Fs {
+    file: Box<dyn VfsFile>,
+}
+
+impl U8Fs {
+    pub fn new(file: Box<dyn VfsFile>) -> io::Result<Self> { Ok(Self { file }) }
+
+    fn view(&mut self) -> io::Result<U8View> {
+        let data = self.file.map()?;
+        U8View::new(data).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
+    }
+}
+
+impl Vfs for U8Fs {
+    fn open(&mut self, path: &Utf8UnixPath) -> VfsResult<Box<dyn VfsFile>> {
+        let view = self.view()?;
+        match view.find(path) {
+            Some((_, node)) => match node.kind() {
+                U8NodeKind::File => {
+                    let offset = node.offset() as u64;
+                    let len = node.length() as u64;
+                    let file = WindowedFile::new(self.file.clone(), offset, len)?;
+                    Ok(Box::new(file))
+                }
+                U8NodeKind::Directory => Err(VfsError::IsADirectory),
+                U8NodeKind::Invalid => Err(VfsError::from("U8: Invalid node kind")),
+            },
+            None => Err(VfsError::NotFound),
+        }
+    }
+
+    fn exists(&mut self, path: &Utf8UnixPath) -> VfsResult<bool> {
+        let view = self.view()?;
+        Ok(view.find(path).is_some())
+    }
+
+    fn read_dir(&mut self, path: &Utf8UnixPath) -> VfsResult<Vec<String>> {
+        let view = self.view()?;
+        match view.find(path) {
+            Some((idx, node)) => match node.kind() {
+                U8NodeKind::File => Err(VfsError::NotADirectory),
+                U8NodeKind::Directory => {
+                    let mut entries = Vec::new();
+                    let mut idx = idx + 1;
+                    let end = node.length() as usize;
+                    while idx < end {
+                        let child = view.nodes.get(idx).copied().ok_or(VfsError::NotFound)?;
+                        entries.push(view.get_name(child)?.to_string());
+                        if child.is_dir() {
+                            idx = child.length() as usize;
+                        } else {
+                            idx += 1;
+                        }
+                    }
+                    Ok(entries)
+                }
+                U8NodeKind::Invalid => Err(VfsError::from("U8: Invalid node kind")),
+            },
+            None => Err(VfsError::NotFound),
+        }
+    }
+
+    fn metadata(&mut self, path: &Utf8UnixPath) -> VfsResult<VfsMetadata> {
+        let metdata = self.file.metadata()?;
+        let view = self.view()?;
+        match view.find(path) {
+            Some((_, node)) => match node.kind() {
+                U8NodeKind::File => Ok(VfsMetadata {
+                    file_type: VfsFileType::File,
+                    len: node.length() as u64,
+                    mtime: metdata.mtime,
+                }),
+                U8NodeKind::Directory => Ok(VfsMetadata {
+                    file_type: VfsFileType::Directory,
+                    len: 0,
+                    mtime: metdata.mtime,
+                }),
+                U8NodeKind::Invalid => Err(VfsError::from("U8: Invalid node kind")),
+            },
+            None => Err(VfsError::NotFound),
+        }
+    }
+}