ARMv4T (GBA) and ARMv6K (3DS) support (#75)

* Initial ARM support

* Disassemble const pool reloc

* Disasm ARM/Thumb/data based on mapping symbols

* Fallback to mapping symbol `$a`

* Support multiple DWARF sequences

* Update line info

* Rework DWARF line info parsing

- Properly handles multiple sections
  in DWARF 1
- line_info moved into ObjSection
- DWARF 2 parser no longer errors with
  no .text section
- Both parsers properly skip empty
  sections

* Simplify line_info (no Option)

* Get line info from section; output formatted ins string

* Unwrap code section in `arm.rs`

* Handle reloc `R_ARM_SBREL32`

* Update ARM disassembler

* Update README.md

* Format

* Revert "Update README.md"

This reverts commit 8bbfcc6f45.

* Update README.md

* Detect ARM version; support ARMv4T and v6K

* Combobox to force ARM version

* Clear LSB in ARM symbol addresses

* Support big-endian ARM ELF files

* Bump `unarm`, `arm-attr`

* Handle ARM implicit addends

* Update README.md

* Explicitly handle all ARM argument types

* Format

* Display more ARM relocs

* Mask LSB on ARM code symbols only

* Read ARM implicit addends

* Format

---------

Co-authored-by: Luke Street <luke.street@encounterpc.com>

objdiff-core/Cargo.toml

@@ -19,7 +19,7 @@ dwarf = ["gimli"]
 mips = ["any-arch", "rabbitizer"]
 ppc = ["any-arch", "cwdemangle", "ppc750cl"]
 x86 = ["any-arch", "cpp_demangle", "iced-x86", "msvc-demangler"]
-arm = ["any-arch", "cpp_demangle", "unarm"]
+arm = ["any-arch", "cpp_demangle", "unarm", "arm-attr"]
 
 [dependencies]
 anyhow = "1.0.82"
@@ -56,4 +56,5 @@ iced-x86 = { version = "1.21.0", default-features = false, features = ["std", "d
 msvc-demangler = { version = "0.10.0", optional = true }
 
 # arm
-unarm = { version = "1.0.0", optional = true }
+unarm = { version = "1.3.0", optional = true }
+arm-attr = { version = "0.1.1", optional = true }