objdiff-cli diff & report changes, support .splitmeta object section

- Add `objdiff-cli report changes` for diffing two reports
- Unify some click-to-highlight logic between CLI and GUI
- Load .splitmeta section for extra object metadata (original virtual addr, etc)
- More work on objdiff-cli diff

Cargo.lock

@@ -2977,6 +2977,7 @@ dependencies = [
  "serde",
  "serde_json",
  "supports-color",
+ "time",
  "tracing",
  "tracing-attributes",
  "tracing-subscriber",

objdiff-cli/Cargo.toml

@@ -14,16 +14,17 @@ publish = false
 build = "build.rs"
 
 [dependencies]
-crossterm = "0.27.0"
 anyhow = "1.0.80"
 argp = "0.3.0"
+crossterm = "0.27.0"
 enable-ansi-support = "0.2.1"
 log = "0.4.20"
 objdiff-core = { path = "../objdiff-core", features = ["all"] }
+rayon = "1.8.1"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1.0.111"
 supports-color = "3.0.0"
+time = { version = "0.3.31", features = ["formatting", "local-offset"] }
 tracing = "0.1.40"
 tracing-attributes = "0.1.27"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
-serde = { version = "1", features = ["derive"] }
-serde_json = "1.0.111"
-rayon = "1.8.1"

objdiff-cli/src/cmd/diff.rs

@@ -20,10 +20,11 @@ use crossterm::{
 };
 use event::KeyModifiers;
 use objdiff_core::{
+    config::ProjectConfig,
     diff,
-    diff::display::{display_diff, DiffText},
+    diff::display::{display_diff, DiffText, HighlightKind},
     obj,
-    obj::{ObjInfo, ObjInsArgValue, ObjInsDiffKind, ObjSection, ObjSectionKind, ObjSymbol},
+    obj::{ObjInfo, ObjInsDiffKind, ObjSectionKind, ObjSymbol},
 };
 
 use crate::util::term::crossterm_panic_handler;
@@ -32,33 +33,71 @@ use crate::util::term::crossterm_panic_handler;
 /// Diff two object files.
 #[argp(subcommand, name = "diff")]
 pub struct Args {
-    #[argp(positional)]
+    #[argp(option, short = '1')]
     /// Target object file
-    target: PathBuf,
+    target: Option<PathBuf>,
-    #[argp(positional)]
+    #[argp(option, short = '2')]
     /// Base object file
-    base: PathBuf,
+    base: Option<PathBuf>,
+    #[argp(option, short = 'p')]
+    /// Project directory
+    project: Option<PathBuf>,
+    #[argp(option, short = 'u')]
+    /// Unit name within project
+    unit: Option<String>,
     #[argp(option, short = 's')]
     /// Function symbol to diff
     symbol: String,
 }
 
 pub fn run(args: Args) -> Result<()> {
-    let mut target = obj::elf::read(&args.target)
+    let (target_path, base_path, project_config) =
-        .with_context(|| format!("Loading {}", args.target.display()))?;
+        match (&args.target, &args.base, &args.project, &args.unit) {
-    let mut base =
+            (Some(t), Some(b), _, _) => (Some(t.clone()), Some(b.clone()), None),
-        obj::elf::read(&args.base).with_context(|| format!("Loading {}", args.base.display()))?;
+            (_, _, Some(p), Some(u)) => {
-    let config = diff::DiffObjConfig::default();
+                let Some((project_config, project_config_info)) =
-    diff::diff_objs(&config, Some(&mut target), Some(&mut base))?;
+                    objdiff_core::config::try_project_config(p)
-
+                else {
-    let left_sym = find_function(&target, &args.symbol);
+                    bail!("Project config not found in {}", p.display())
-    let right_sym = find_function(&base, &args.symbol);
-    let max_len = match (left_sym, right_sym) {
-        (Some((_, l)), Some((_, r))) => l.instructions.len().max(r.instructions.len()),
-        (Some((_, l)), None) => l.instructions.len(),
-        (None, Some((_, r))) => r.instructions.len(),
-        (None, None) => bail!("Symbol not found: {}", args.symbol),
                 };
+                let mut project_config = project_config.with_context(|| {
+                    format!("Reading project config {}", project_config_info.path.display())
+                })?;
+                let Some(object) = project_config.objects.iter_mut().find(|obj| obj.name() == u)
+                else {
+                    bail!("Unit not found: {}", u)
+                };
+                object.resolve_paths(
+                    p,
+                    project_config.target_dir.as_deref(),
+                    project_config.base_dir.as_deref(),
+                );
+                let target_path = object.target_path.clone();
+                let base_path = object.base_path.clone();
+                (target_path, base_path, Some(project_config))
+            }
+            _ => bail!("Either target and base or project and unit must be specified"),
+        };
+    let mut state = FunctionDiffUi {
+        clear: true,
+        redraw: true,
+        size: (0, 0),
+        click_xy: None,
+        left_highlight: HighlightKind::None,
+        right_highlight: HighlightKind::None,
+        skip: 0,
+        y_offset: 2,
+        per_page: 0,
+        max_len: 0,
+        symbol_name: args.symbol.clone(),
+        target_path,
+        base_path,
+        project_config,
+        left_sym: None,
+        right_sym: None,
+        reload_time: time::OffsetDateTime::now_local()?,
+    };
+    state.reload()?;
 
     crossterm_panic_handler();
     enable_raw_mode()?;
@@ -69,175 +108,26 @@ pub fn run(args: Args) -> Result<()> {
         Hide,
         EnableMouseCapture,
     )?;
+    state.size = terminal_size()?;
 
-    let mut clear = true;
-    let mut redraw = true;
-    let mut skip = 0;
-    let mut click_xy = None;
-    let mut highlight = HighlightKind::None;
-    let (mut sx, mut sy) = terminal_size()?;
     loop {
-        let y_offset = 2;
+        let reload = loop {
-        let per_page = sy as usize - y_offset;
+            if state.redraw {
-        if redraw {
+                state.draw()?;
-            let mut w = stdout().lock();
+                if state.redraw {
-            if clear {
+                    continue;
-                crossterm::queue!(w, Clear(ClearType::All))?;
-            }
-            crossterm::queue!(
-                w,
-                MoveTo(0, 0),
-                PrintStyledContent(args.symbol.clone().with(Color::White)),
-                MoveTo(0, 1),
-                PrintStyledContent(" ".repeat(sx as usize).underlined()),
-                MoveTo(0, 1),
-                PrintStyledContent("TARGET ".underlined()),
-                MoveTo(sx / 2, 0),
-                PrintStyledContent("Last built: 18:24:20".with(Color::White)),
-                MoveTo(sx / 2, 1),
-                PrintStyledContent("BASE ".underlined()),
-            )?;
-            if let Some(percent) = right_sym.and_then(|(_, s)| s.match_percent) {
-                crossterm::queue!(
-                    w,
-                    PrintStyledContent(
-                        format!("{:.2}%", percent).with(match_percent_color(percent)).underlined()
-                    )
-                )?;
-            }
-
-            if skip > max_len - per_page {
-                skip = max_len - per_page;
-            }
-            let mut new_highlight = None;
-            if let Some((_, symbol)) = left_sym {
-                let h = print_sym(
-                    &mut w,
-                    symbol,
-                    0,
-                    y_offset as u16,
-                    sx / 2 - 1,
-                    sy,
-                    skip,
-                    &mut highlight,
-                    click_xy,
-                )?;
-                if let Some(h) = h {
-                    new_highlight = Some(h);
                 }
             }
-            if let Some((_, symbol)) = right_sym {
+            match state.handle_event(event::read()?) {
-                let h = print_sym(
+                FunctionDiffResult::Break => break false,
-                    &mut w,
+                FunctionDiffResult::Continue => {}
-                    symbol,
+                FunctionDiffResult::Reload => break true,
-                    sx / 2,
-                    y_offset as u16,
-                    sx,
-                    sy,
-                    skip,
-                    &mut highlight,
-                    click_xy,
-                )?;
-                if let Some(h) = h {
-                    new_highlight = Some(h);
             }
-            }
+        };
-            w.flush()?;
+        if reload {
-            if let Some(new_highlight) = new_highlight {
+            state.reload()?;
-                highlight = new_highlight;
-                redraw = true;
-                click_xy = None;
-                clear = false;
-                continue; // Redraw now
         } else {
-                redraw = false;
+            break;
-                click_xy = None;
-                clear = true;
-            }
-        }
-
-        match event::read()? {
-            Event::Key(event)
-                if matches!(event.kind, KeyEventKind::Press | KeyEventKind::Repeat) =>
-            {
-                match event.code {
-                    // Quit
-                    KeyCode::Esc | KeyCode::Char('q') => break,
-                    // Page up
-                    KeyCode::PageUp => {
-                        skip = skip.saturating_sub(per_page);
-                        redraw = true;
-                    }
-                    // Page up (shift + space)
-                    KeyCode::Char(' ') if event.modifiers.contains(KeyModifiers::SHIFT) => {
-                        skip = skip.saturating_sub(per_page);
-                        redraw = true;
-                    }
-                    // Page down
-                    KeyCode::Char(' ') | KeyCode::PageDown => {
-                        skip += per_page;
-                        redraw = true;
-                    }
-                    KeyCode::Char('f') if event.modifiers.contains(KeyModifiers::CONTROL) => {
-                        skip += per_page;
-                        redraw = true;
-                    }
-                    KeyCode::Char('b') if event.modifiers.contains(KeyModifiers::CONTROL) => {
-                        skip = skip.saturating_sub(per_page);
-                        redraw = true;
-                    }
-                    KeyCode::Char('d') if event.modifiers.contains(KeyModifiers::CONTROL) => {
-                        skip += per_page / 2;
-                        redraw = true;
-                    }
-                    KeyCode::Char('u') if event.modifiers.contains(KeyModifiers::CONTROL) => {
-                        skip = skip.saturating_sub(per_page / 2);
-                        redraw = true;
-                    }
-                    // Scroll down
-                    KeyCode::Down | KeyCode::Char('j') => {
-                        skip += 1;
-                        redraw = true;
-                    }
-                    // Scroll up
-                    KeyCode::Up | KeyCode::Char('k') => {
-                        skip = skip.saturating_sub(1);
-                        redraw = true;
-                    }
-                    // Scroll to start
-                    KeyCode::Char('g') => {
-                        skip = 0;
-                        redraw = true;
-                    }
-                    // Scroll to end
-                    KeyCode::Char('G') => {
-                        skip = max_len;
-                        redraw = true;
-                    }
-                    _ => {}
-                }
-            }
-            Event::Mouse(event) => match event.kind {
-                MouseEventKind::ScrollDown => {
-                    skip += 3;
-                    redraw = true;
-                }
-                MouseEventKind::ScrollUp => {
-                    skip = skip.saturating_sub(3);
-                    redraw = true;
-                }
-                MouseEventKind::Down(MouseButton::Left) => {
-                    click_xy = Some((event.column, event.row));
-                    redraw = true;
-                }
-                _ => {}
-            },
-            Event::Resize(x, y) => {
-                sx = x;
-                sy = y;
-                redraw = true;
-            }
-            _ => {}
         }
     }
 
@@ -247,39 +137,256 @@ pub fn run(args: Args) -> Result<()> {
     Ok(())
 }
 
-fn find_function<'a>(obj: &'a ObjInfo, name: &str) -> Option<(&'a ObjSection, &'a ObjSymbol)> {
+fn find_function(obj: &ObjInfo, name: &str) -> Option<ObjSymbol> {
     for section in &obj.sections {
         if section.kind != ObjSectionKind::Code {
             continue;
         }
         for symbol in &section.symbols {
             if symbol.name == name {
-                return Some((section, symbol));
+                return Some(symbol.clone());
             }
         }
     }
     None
 }
 
-#[allow(clippy::too_many_arguments)]
+#[allow(dead_code)]
-fn print_sym<W>(
+struct FunctionDiffUi {
+    clear: bool,
+    redraw: bool,
+    size: (u16, u16),
+    click_xy: Option<(u16, u16)>,
+    left_highlight: HighlightKind,
+    right_highlight: HighlightKind,
+    skip: usize,
+    y_offset: usize,
+    per_page: usize,
+    max_len: usize,
+    symbol_name: String,
+    target_path: Option<PathBuf>,
+    base_path: Option<PathBuf>,
+    project_config: Option<ProjectConfig>,
+    left_sym: Option<ObjSymbol>,
+    right_sym: Option<ObjSymbol>,
+    reload_time: time::OffsetDateTime,
+}
+
+enum FunctionDiffResult {
+    Break,
+    Continue,
+    Reload,
+}
+
+impl FunctionDiffUi {
+    fn draw(&mut self) -> Result<()> {
+        let mut w = stdout().lock();
+        if self.clear {
+            crossterm::queue!(w, Clear(ClearType::All))?;
+        }
+        let format = time::format_description::parse("[hour]:[minute]:[second]").unwrap();
+        let reload_time = self.reload_time.format(&format).unwrap();
+        crossterm::queue!(
+            w,
+            MoveTo(0, 0),
+            PrintStyledContent(self.symbol_name.clone().with(Color::White)),
+            MoveTo(0, 1),
+            PrintStyledContent(" ".repeat(self.size.0 as usize).underlined()),
+            MoveTo(0, 1),
+            PrintStyledContent("TARGET ".underlined()),
+            MoveTo(self.size.0 / 2, 0),
+            PrintStyledContent(format!("Last reload: {}", reload_time).with(Color::White)),
+            MoveTo(self.size.0 / 2, 1),
+            PrintStyledContent("BASE ".underlined()),
+        )?;
+        if let Some(percent) = self.right_sym.as_ref().and_then(|s| s.match_percent) {
+            crossterm::queue!(
+                w,
+                PrintStyledContent(
+                    format!("{:.2}%", percent).with(match_percent_color(percent)).underlined()
+                )
+            )?;
+        }
+
+        self.per_page = self.size.1 as usize - self.y_offset;
+        let max_skip = self.max_len.saturating_sub(self.per_page);
+        if self.skip > max_skip {
+            self.skip = max_skip;
+        }
+        let mut left_highlight = None;
+        if let Some(symbol) = &self.left_sym {
+            let h = self.print_sym(
+                &mut w,
+                symbol,
+                (0, self.y_offset as u16),
+                (self.size.0 / 2 - 1, self.size.1),
+                &self.left_highlight,
+            )?;
+            if let Some(h) = h {
+                left_highlight = Some(h);
+            }
+        }
+        let mut right_highlight = None;
+        if let Some(symbol) = &self.right_sym {
+            let h = self.print_sym(
+                &mut w,
+                symbol,
+                (self.size.0 / 2, self.y_offset as u16),
+                self.size,
+                &self.right_highlight,
+            )?;
+            if let Some(h) = h {
+                right_highlight = Some(h);
+            }
+        }
+        w.flush()?;
+        if let Some(new_highlight) = left_highlight {
+            if new_highlight == self.left_highlight {
+                if self.left_highlight != self.right_highlight {
+                    self.right_highlight = self.left_highlight.clone();
+                } else {
+                    self.left_highlight = HighlightKind::None;
+                    self.right_highlight = HighlightKind::None;
+                }
+            } else {
+                self.left_highlight = new_highlight;
+            }
+            self.redraw = true;
+            self.click_xy = None;
+            self.clear = false;
+        } else if let Some(new_highlight) = right_highlight {
+            if new_highlight == self.right_highlight {
+                if self.left_highlight != self.right_highlight {
+                    self.left_highlight = self.right_highlight.clone();
+                } else {
+                    self.left_highlight = HighlightKind::None;
+                    self.right_highlight = HighlightKind::None;
+                }
+            } else {
+                self.right_highlight = new_highlight;
+            }
+            self.redraw = true;
+            self.click_xy = None;
+            self.clear = false;
+        } else {
+            self.redraw = false;
+            self.click_xy = None;
+            self.clear = true;
+        }
+        Ok(())
+    }
+
+    fn handle_event(&mut self, event: Event) -> FunctionDiffResult {
+        match event {
+            Event::Key(event)
+                if matches!(event.kind, KeyEventKind::Press | KeyEventKind::Repeat) =>
+            {
+                match event.code {
+                    // Quit
+                    KeyCode::Esc | KeyCode::Char('q') => return FunctionDiffResult::Break,
+                    // Page up
+                    KeyCode::PageUp => {
+                        self.skip = self.skip.saturating_sub(self.per_page);
+                        self.redraw = true;
+                    }
+                    // Page up (shift + space)
+                    KeyCode::Char(' ') if event.modifiers.contains(KeyModifiers::SHIFT) => {
+                        self.skip = self.skip.saturating_sub(self.per_page);
+                        self.redraw = true;
+                    }
+                    // Page down
+                    KeyCode::Char(' ') | KeyCode::PageDown => {
+                        self.skip += self.per_page;
+                        self.redraw = true;
+                    }
+                    // Page down (ctrl + f)
+                    KeyCode::Char('f') if event.modifiers.contains(KeyModifiers::CONTROL) => {
+                        self.skip += self.per_page;
+                        self.redraw = true;
+                    }
+                    // Page up (ctrl + b)
+                    KeyCode::Char('b') if event.modifiers.contains(KeyModifiers::CONTROL) => {
+                        self.skip = self.skip.saturating_sub(self.per_page);
+                        self.redraw = true;
+                    }
+                    // Half page down (ctrl + d)
+                    KeyCode::Char('d') if event.modifiers.contains(KeyModifiers::CONTROL) => {
+                        self.skip += self.per_page / 2;
+                        self.redraw = true;
+                    }
+                    // Half page up (ctrl + u)
+                    KeyCode::Char('u') if event.modifiers.contains(KeyModifiers::CONTROL) => {
+                        self.skip = self.skip.saturating_sub(self.per_page / 2);
+                        self.redraw = true;
+                    }
+                    // Scroll down
+                    KeyCode::Down | KeyCode::Char('j') => {
+                        self.skip += 1;
+                        self.redraw = true;
+                    }
+                    // Scroll up
+                    KeyCode::Up | KeyCode::Char('k') => {
+                        self.skip = self.skip.saturating_sub(1);
+                        self.redraw = true;
+                    }
+                    // Scroll to start
+                    KeyCode::Char('g') => {
+                        self.skip = 0;
+                        self.redraw = true;
+                    }
+                    // Scroll to end
+                    KeyCode::Char('G') => {
+                        self.skip = self.max_len;
+                        self.redraw = true;
+                    }
+                    // Reload
+                    KeyCode::Char('r') => {
+                        self.redraw = true;
+                        return FunctionDiffResult::Reload;
+                    }
+                    _ => {}
+                }
+            }
+            Event::Mouse(event) => match event.kind {
+                MouseEventKind::ScrollDown => {
+                    self.skip += 3;
+                    self.redraw = true;
+                }
+                MouseEventKind::ScrollUp => {
+                    self.skip = self.skip.saturating_sub(3);
+                    self.redraw = true;
+                }
+                MouseEventKind::Down(MouseButton::Left) => {
+                    self.click_xy = Some((event.column, event.row));
+                    self.redraw = true;
+                }
+                _ => {}
+            },
+            Event::Resize(x, y) => {
+                self.size = (x, y);
+                self.redraw = true;
+            }
+            _ => {}
+        }
+        FunctionDiffResult::Continue
+    }
+
+    fn print_sym<W>(
+        &self,
         w: &mut W,
         symbol: &ObjSymbol,
-    sx: u16,
+        origin: (u16, u16),
-    mut sy: u16,
+        max: (u16, u16),
-    max_sx: u16,
+        highlight: &HighlightKind,
-    max_sy: u16,
+    ) -> Result<Option<HighlightKind>>
-    skip: usize,
+    where
-    highlight: &mut HighlightKind,
-    click_xy: Option<(u16, u16)>,
-) -> Result<Option<HighlightKind>>
-where
         W: Write,
-{
+    {
         let base_addr = symbol.address as u32;
         let mut new_highlight = None;
-    for ins_diff in symbol.instructions.iter().skip(skip) {
+        let mut sy = origin.1;
-        let mut sx = sx;
+        for ins_diff in symbol.instructions.iter().skip(self.skip) {
+            let mut sx = origin.0;
             if ins_diff.kind != ObjInsDiffKind::None && sx > 2 {
                 crossterm::queue!(w, MoveTo(sx - 2, sy))?;
                 let s = match ins_diff.kind {
@@ -294,15 +401,14 @@ where
             display_diff(ins_diff, base_addr, |text| -> Result<()> {
                 let mut label_text;
                 let mut base_color = match ins_diff.kind {
-                ObjInsDiffKind::None | ObjInsDiffKind::OpMismatch | ObjInsDiffKind::ArgMismatch => {
+                    ObjInsDiffKind::None
-                    Color::Grey
+                    | ObjInsDiffKind::OpMismatch
-                }
+                    | ObjInsDiffKind::ArgMismatch => Color::Grey,
                     ObjInsDiffKind::Replace => Color::DarkCyan,
                     ObjInsDiffKind::Delete => Color::DarkRed,
                     ObjInsDiffKind::Insert => Color::DarkGreen,
                 };
                 let mut pad_to = 0;
-            let mut highlight_kind = HighlightKind::None;
                 match text {
                     DiffText::Basic(text) => {
                         label_text = text.to_string();
@@ -319,32 +425,27 @@ where
                     DiffText::Address(addr) => {
                         label_text = format!("{:x}:", addr);
                         pad_to = 5;
-                    highlight_kind = HighlightKind::Address(addr);
                     }
-                DiffText::Opcode(mnemonic, op) => {
+                    DiffText::Opcode(mnemonic, _op) => {
                         label_text = mnemonic.to_string();
                         if ins_diff.kind == ObjInsDiffKind::OpMismatch {
                             base_color = Color::Blue;
                         }
                         pad_to = 8;
-                    highlight_kind = HighlightKind::Opcode(op);
                     }
                     DiffText::Argument(arg, diff) => {
                         label_text = arg.to_string();
                         if let Some(diff) = diff {
                             base_color = COLOR_ROTATION[diff.idx % COLOR_ROTATION.len()]
                         }
-                    highlight_kind = HighlightKind::Arg(arg.clone());
                     }
                     DiffText::BranchTarget(addr) => {
                         label_text = format!("{addr:x}");
-                    highlight_kind = HighlightKind::Address(addr);
                     }
                     DiffText::Symbol(sym) => {
                         let name = sym.demangled_name.as_ref().unwrap_or(&sym.name);
                         label_text = name.clone();
                         base_color = Color::White;
-                    highlight_kind = HighlightKind::Symbol(name.clone());
                     }
                     DiffText::Spacing(n) => {
                         crossterm::queue!(w, MoveRight(n as u16))?;
@@ -357,20 +458,16 @@ where
                     }
                 }
                 let len = label_text.len();
-            if sx >= max_sx {
+                if sx >= max.0 {
                     return Ok(());
                 }
-            let highlighted = highlight == &highlight_kind;
+                let highlighted = *highlight == text;
-            if let Some((cx, cy)) = click_xy {
+                if let Some((cx, cy)) = self.click_xy {
                     if cx >= sx && cx < sx + len as u16 && cy == sy {
-                    if highlighted {
+                        new_highlight = Some(text.into());
-                        new_highlight = Some(HighlightKind::None);
-                    } else {
-                        new_highlight = Some(highlight_kind);
                     }
                 }
-            }
+                label_text.truncate(max.0 as usize - sx as usize);
-            label_text.truncate(max_sx as usize - sx as usize);
                 let mut content = label_text.with(base_color);
                 if highlighted {
                     content = content.on_dark_grey();
@@ -384,11 +481,40 @@ where
                 }
                 Ok(())
             })?;
-        if sy >= max_sy {
+            if sy >= max.1 {
                 break;
             }
         }
         Ok(new_highlight)
+    }
+
+    fn reload(&mut self) -> Result<()> {
+        let mut target = self
+            .target_path
+            .as_deref()
+            .map(|p| obj::elf::read(p).with_context(|| format!("Loading {}", p.display())))
+            .transpose()?;
+        let mut base = self
+            .base_path
+            .as_deref()
+            .map(|p| obj::elf::read(p).with_context(|| format!("Loading {}", p.display())))
+            .transpose()?;
+        let config = diff::DiffObjConfig::default();
+        diff::diff_objs(&config, target.as_mut(), base.as_mut())?;
+
+        let left_sym = target.as_ref().and_then(|o| find_function(o, &self.symbol_name));
+        let right_sym = base.as_ref().and_then(|o| find_function(o, &self.symbol_name));
+        self.max_len = match (&left_sym, &right_sym) {
+            (Some(l), Some(r)) => l.instructions.len().max(r.instructions.len()),
+            (Some(l), None) => l.instructions.len(),
+            (None, Some(r)) => r.instructions.len(),
+            (None, None) => bail!("Symbol not found: {}", self.symbol_name),
+        };
+        self.left_sym = left_sym;
+        self.right_sym = right_sym;
+        self.reload_time = time::OffsetDateTime::now_local()?;
+        Ok(())
+    }
 }
 
 pub const COLOR_ROTATION: [Color; 8] = [
@@ -411,26 +537,3 @@ pub fn match_percent_color(match_percent: f32) -> Color {
         Color::Red
     }
 }
-
-#[derive(Default)]
-pub enum HighlightKind {
-    #[default]
-    None,
-    Opcode(u8),
-    Arg(ObjInsArgValue),
-    Symbol(String),
-    Address(u32),
-}
-
-impl PartialEq for HighlightKind {
-    fn eq(&self, other: &Self) -> bool {
-        match (self, other) {
-            (HighlightKind::None, HighlightKind::None) => false,
-            (HighlightKind::Opcode(a), HighlightKind::Opcode(b)) => a == b,
-            (HighlightKind::Arg(a), HighlightKind::Arg(b)) => a.loose_eq(b),
-            (HighlightKind::Symbol(a), HighlightKind::Symbol(b)) => a == b,
-            (HighlightKind::Address(a), HighlightKind::Address(b)) => a == b,
-            _ => false,
-        }
-    }
-}

objdiff-cli/src/cmd/report.rs

@@ -1,7 +1,7 @@
 use std::{
     collections::HashSet,
     fs::File,
-    io::{BufWriter, Write},
+    io::{BufReader, BufWriter, Write},
     path::{Path, PathBuf},
     time::Instant,
 };
@@ -16,9 +16,24 @@ use objdiff_core::{
 use rayon::iter::{IntoParallelRefMutIterator, ParallelIterator};
 
 #[derive(FromArgs, PartialEq, Debug)]
-/// Generate a report from a project.
+/// Commands for processing NVIDIA Shield TV alf files.
 #[argp(subcommand, name = "report")]
 pub struct Args {
+    #[argp(subcommand)]
+    command: SubCommand,
+}
+
+#[derive(FromArgs, PartialEq, Debug)]
+#[argp(subcommand)]
+pub enum SubCommand {
+    Generate(GenerateArgs),
+    Changes(ChangesArgs),
+}
+
+#[derive(FromArgs, PartialEq, Debug)]
+/// Generate a report from a project.
+#[argp(subcommand, name = "generate")]
+pub struct GenerateArgs {
     #[argp(option, short = 'p')]
     /// Project directory
     project: Option<PathBuf>,
@@ -30,7 +45,22 @@ pub struct Args {
     deduplicate: bool,
 }
 
-#[derive(Debug, Clone, Default, serde::Serialize)]
+#[derive(FromArgs, PartialEq, Debug)]
+/// List any changes from a previous report.
+#[argp(subcommand, name = "changes")]
+pub struct ChangesArgs {
+    #[argp(positional)]
+    /// Previous report JSON file
+    previous: PathBuf,
+    #[argp(positional)]
+    /// Current report JSON file
+    current: PathBuf,
+    #[argp(option, short = 'o')]
+    /// Output JSON file
+    output: Option<PathBuf>,
+}
+
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
 struct Report {
     fuzzy_match_percent: f32,
     total_size: u64,
@@ -42,29 +72,46 @@ struct Report {
     units: Vec<ReportUnit>,
 }
 
-#[derive(Debug, Clone, Default, serde::Serialize)]
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
 struct ReportUnit {
     name: String,
-    match_percent: f32,
+    fuzzy_match_percent: f32,
     total_size: u64,
     matched_size: u64,
     total_functions: u32,
     matched_functions: u32,
     #[serde(skip_serializing_if = "Option::is_none")]
     complete: Option<bool>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    module_name: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    module_id: Option<u32>,
     functions: Vec<ReportFunction>,
 }
 
-#[derive(Debug, Clone, Default, serde::Serialize)]
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
 struct ReportFunction {
     name: String,
     #[serde(skip_serializing_if = "Option::is_none")]
     demangled_name: Option<String>,
+    #[serde(
+        skip_serializing_if = "Option::is_none",
+        serialize_with = "serialize_hex",
+        deserialize_with = "deserialize_hex"
+    )]
+    address: Option<u64>,
     size: u64,
-    match_percent: f32,
+    fuzzy_match_percent: f32,
 }
 
 pub fn run(args: Args) -> Result<()> {
+    match args.command {
+        SubCommand::Generate(args) => generate(args),
+        SubCommand::Changes(args) => changes(args),
+    }
+}
+
+fn generate(args: GenerateArgs) -> Result<()> {
     let project_dir = args.project.as_deref().unwrap_or_else(|| Path::new("."));
     log::info!("Loading project {}", project_dir.display());
 
@@ -111,7 +158,7 @@ pub fn run(args: Args) -> Result<()> {
         report.units = units.into_iter().flatten().collect();
     }
     for unit in &report.units {
-        report.fuzzy_match_percent += unit.match_percent * unit.total_size as f32;
+        report.fuzzy_match_percent += unit.fuzzy_match_percent * unit.total_size as f32;
         report.total_size += unit.total_size;
         report.matched_size += unit.matched_size;
         report.total_functions += unit.total_functions;
@@ -180,7 +227,16 @@ fn report_object(
         .transpose()?;
     let config = diff::DiffObjConfig { relax_reloc_diffs: true };
     diff::diff_objs(&config, target.as_mut(), base.as_mut())?;
-    let mut unit = ReportUnit { name: object.name().to_string(), ..Default::default() };
+    let mut unit = ReportUnit {
+        name: object.name().to_string(),
+        complete: object.complete,
+        module_name: target
+            .as_ref()
+            .and_then(|o| o.split_meta.as_ref())
+            .and_then(|m| m.module_name.clone()),
+        module_id: target.as_ref().and_then(|o| o.split_meta.as_ref()).and_then(|m| m.module_id),
+        ..Default::default()
+    };
     let obj = target.as_ref().or(base.as_ref()).unwrap();
     for section in &obj.sections {
         if section.kind != ObjSectionKind::Code {
@@ -207,7 +263,7 @@ fn report_object(
                     0.0
                 }
             });
-            unit.match_percent += match_percent * symbol.size as f32;
+            unit.fuzzy_match_percent += match_percent * symbol.size as f32;
             unit.total_size += symbol.size;
             if match_percent == 100.0 {
                 unit.matched_size += symbol.size;
@@ -216,7 +272,8 @@ fn report_object(
                 name: symbol.name.clone(),
                 demangled_name: symbol.demangled_name.clone(),
                 size: symbol.size,
-                match_percent,
+                fuzzy_match_percent: match_percent,
+                address: symbol.virtual_address,
             });
             if match_percent == 100.0 {
                 unit.matched_functions += 1;
@@ -225,9 +282,212 @@ fn report_object(
         }
     }
     if unit.total_size == 0 {
-        unit.match_percent = 100.0;
+        unit.fuzzy_match_percent = 100.0;
     } else {
-        unit.match_percent /= unit.total_size as f32;
+        unit.fuzzy_match_percent /= unit.total_size as f32;
     }
     Ok(Some(unit))
 }
+
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
+struct Changes {
+    from: ChangeInfo,
+    to: ChangeInfo,
+    units: Vec<ChangeUnit>,
+}
+
+#[derive(Debug, Clone, Default, PartialEq, serde::Serialize, serde::Deserialize)]
+struct ChangeInfo {
+    fuzzy_match_percent: f32,
+    total_size: u64,
+    matched_size: u64,
+    matched_size_percent: f32,
+    total_functions: u32,
+    matched_functions: u32,
+    matched_functions_percent: f32,
+}
+
+impl From<&Report> for ChangeInfo {
+    fn from(report: &Report) -> Self {
+        Self {
+            fuzzy_match_percent: report.fuzzy_match_percent,
+            total_size: report.total_size,
+            matched_size: report.matched_size,
+            matched_size_percent: report.matched_size_percent,
+            total_functions: report.total_functions,
+            matched_functions: report.matched_functions,
+            matched_functions_percent: report.matched_functions_percent,
+        }
+    }
+}
+
+impl From<&ReportUnit> for ChangeInfo {
+    fn from(value: &ReportUnit) -> Self {
+        Self {
+            fuzzy_match_percent: value.fuzzy_match_percent,
+            total_size: value.total_size,
+            matched_size: value.matched_size,
+            matched_size_percent: if value.total_size == 0 {
+                100.0
+            } else {
+                value.matched_size as f32 / value.total_size as f32 * 100.0
+            },
+            total_functions: value.total_functions,
+            matched_functions: value.matched_functions,
+            matched_functions_percent: if value.total_functions == 0 {
+                100.0
+            } else {
+                value.matched_functions as f32 / value.total_functions as f32 * 100.0
+            },
+        }
+    }
+}
+
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
+struct ChangeUnit {
+    name: String,
+    from: Option<ChangeInfo>,
+    to: Option<ChangeInfo>,
+    functions: Vec<ChangeFunction>,
+}
+
+#[derive(Debug, Clone, Default, serde::Serialize, serde::Deserialize)]
+struct ChangeFunction {
+    name: String,
+    from: Option<ChangeFunctionInfo>,
+    to: Option<ChangeFunctionInfo>,
+}
+
+#[derive(Debug, Clone, Default, PartialEq, serde::Serialize, serde::Deserialize)]
+struct ChangeFunctionInfo {
+    fuzzy_match_percent: f32,
+    size: u64,
+}
+
+impl From<&ReportFunction> for ChangeFunctionInfo {
+    fn from(value: &ReportFunction) -> Self {
+        Self { fuzzy_match_percent: value.fuzzy_match_percent, size: value.size }
+    }
+}
+
+fn changes(args: ChangesArgs) -> Result<()> {
+    let previous = read_report(&args.previous)?;
+    let current = read_report(&args.current)?;
+    let mut changes = Changes {
+        from: ChangeInfo::from(&previous),
+        to: ChangeInfo::from(&current),
+        units: vec![],
+    };
+    for prev_unit in &previous.units {
+        let prev_unit_info = ChangeInfo::from(prev_unit);
+        let curr_unit = current.units.iter().find(|u| u.name == prev_unit.name);
+        let curr_unit_info = curr_unit.map(ChangeInfo::from);
+        let mut functions = vec![];
+        if let Some(curr_unit) = curr_unit {
+            for prev_func in &prev_unit.functions {
+                let prev_func_info = ChangeFunctionInfo::from(prev_func);
+                let curr_func = curr_unit.functions.iter().find(|f| f.name == prev_func.name);
+                let curr_func_info = curr_func.map(ChangeFunctionInfo::from);
+                if let Some(curr_func_info) = curr_func_info {
+                    if prev_func_info != curr_func_info {
+                        functions.push(ChangeFunction {
+                            name: prev_func.name.clone(),
+                            from: Some(prev_func_info),
+                            to: Some(curr_func_info),
+                        });
+                    }
+                } else {
+                    functions.push(ChangeFunction {
+                        name: prev_func.name.clone(),
+                        from: Some(prev_func_info),
+                        to: None,
+                    });
+                }
+            }
+            for curr_func in &curr_unit.functions {
+                if !prev_unit.functions.iter().any(|f| f.name == curr_func.name) {
+                    functions.push(ChangeFunction {
+                        name: curr_func.name.clone(),
+                        from: None,
+                        to: Some(ChangeFunctionInfo::from(curr_func)),
+                    });
+                }
+            }
+        } else {
+            for prev_func in &prev_unit.functions {
+                functions.push(ChangeFunction {
+                    name: prev_func.name.clone(),
+                    from: Some(ChangeFunctionInfo::from(prev_func)),
+                    to: None,
+                });
+            }
+        }
+        if !functions.is_empty() || !matches!(&curr_unit_info, Some(v) if v == &prev_unit_info) {
+            changes.units.push(ChangeUnit {
+                name: prev_unit.name.clone(),
+                from: Some(prev_unit_info),
+                to: curr_unit_info,
+                functions,
+            });
+        }
+    }
+    for curr_unit in &current.units {
+        if !previous.units.iter().any(|u| u.name == curr_unit.name) {
+            changes.units.push(ChangeUnit {
+                name: curr_unit.name.clone(),
+                from: None,
+                to: Some(ChangeInfo::from(curr_unit)),
+                functions: curr_unit
+                    .functions
+                    .iter()
+                    .map(|f| ChangeFunction {
+                        name: f.name.clone(),
+                        from: None,
+                        to: Some(ChangeFunctionInfo::from(f)),
+                    })
+                    .collect(),
+            });
+        }
+    }
+    if let Some(output) = &args.output {
+        log::info!("Writing to {}", output.display());
+        let mut output = BufWriter::new(
+            File::create(output)
+                .with_context(|| format!("Failed to create file {}", output.display()))?,
+        );
+        serde_json::to_writer_pretty(&mut output, &changes)?;
+        output.flush()?;
+    } else {
+        serde_json::to_writer_pretty(std::io::stdout(), &changes)?;
+    }
+    Ok(())
+}
+
+fn read_report(path: &Path) -> Result<Report> {
+    serde_json::from_reader(BufReader::new(
+        File::open(path).with_context(|| format!("Failed to open {}", path.display()))?,
+    ))
+    .with_context(|| format!("Failed to read report {}", path.display()))
+}
+
+fn serialize_hex<S>(x: &Option<u64>, s: S) -> Result<S::Ok, S::Error>
+where S: serde::Serializer {
+    if let Some(x) = x {
+        s.serialize_str(&format!("{:#x}", x))
+    } else {
+        s.serialize_none()
+    }
+}
+
+fn deserialize_hex<'de, D>(d: D) -> Result<Option<u64>, D::Error>
+where D: serde::Deserializer<'de> {
+    use serde::Deserialize;
+    let s = String::deserialize(d)?;
+    if s.is_empty() {
+        Ok(None)
+    } else if !s.starts_with("0x") {
+        Err(serde::de::Error::custom("expected hex string"))
+    } else {
+        u64::from_str_radix(&s[2..], 16).map(Some).map_err(serde::de::Error::custom)
+    }
+}

objdiff-cli/src/util/term.rs

@@ -3,13 +3,12 @@ use std::panic;
 pub fn crossterm_panic_handler() {
     let original_hook = panic::take_hook();
     panic::set_hook(Box::new(move |panic_info| {
-        crossterm::execute!(
+        let _ = crossterm::execute!(
             std::io::stderr(),
             crossterm::terminal::LeaveAlternateScreen,
             crossterm::event::DisableMouseCapture
-        )
+        );
-        .unwrap();
+        let _ = crossterm::terminal::disable_raw_mode();
-        crossterm::terminal::disable_raw_mode().unwrap();
         original_hook(panic_info);
     }));
 }

objdiff-core/src/diff/display.rs

@@ -28,6 +28,16 @@ pub enum DiffText<'a> {
     Eol,
 }
 
+#[derive(Default, Clone, PartialEq, Eq)]
+pub enum HighlightKind {
+    #[default]
+    None,
+    Opcode(u8),
+    Arg(ObjInsArgValue),
+    Symbol(String),
+    Address(u32),
+}
+
 pub fn display_diff<E>(
     ins_diff: &ObjInsDiff,
     base_addr: u32,
@@ -177,3 +187,31 @@ fn display_reloc<E>(
     }
     Ok(())
 }
+
+impl PartialEq<DiffText<'_>> for HighlightKind {
+    fn eq(&self, other: &DiffText) -> bool {
+        match (self, other) {
+            (HighlightKind::Opcode(a), DiffText::Opcode(_, b)) => a == b,
+            (HighlightKind::Arg(a), DiffText::Argument(b, _)) => a.loose_eq(b),
+            (HighlightKind::Symbol(a), DiffText::Symbol(b)) => a == &b.name,
+            (HighlightKind::Address(a), DiffText::Address(b) | DiffText::BranchTarget(b)) => a == b,
+            _ => false,
+        }
+    }
+}
+
+impl PartialEq<HighlightKind> for DiffText<'_> {
+    fn eq(&self, other: &HighlightKind) -> bool { other.eq(self) }
+}
+
+impl From<DiffText<'_>> for HighlightKind {
+    fn from(value: DiffText<'_>) -> Self {
+        match value {
+            DiffText::Opcode(_, op) => HighlightKind::Opcode(op),
+            DiffText::Argument(arg, _) => HighlightKind::Arg(arg.clone()),
+            DiffText::Symbol(sym) => HighlightKind::Symbol(sym.name.to_string()),
+            DiffText::Address(addr) | DiffText::BranchTarget(addr) => HighlightKind::Address(addr),
+            _ => HighlightKind::None,
+        }
+    }
+}

objdiff-core/src/obj/elf.rs

@@ -1,15 +1,16 @@
-use std::{borrow::Cow, collections::BTreeMap, fs, io::Cursor, path::Path};
+use std::{collections::BTreeMap, fs, io::Cursor, path::Path};
 
 use anyhow::{anyhow, bail, ensure, Context, Result};
 use byteorder::{BigEndian, ReadBytesExt};
 use filetime::FileTime;
 use flagset::Flags;
 use object::{
-    elf, Architecture, Endianness, File, Object, ObjectSection, ObjectSymbol, RelocationKind,
+    elf, Architecture, File, Object, ObjectSection, ObjectSymbol, RelocationKind, RelocationTarget,
-    RelocationTarget, SectionIndex, SectionKind, Symbol, SymbolKind, SymbolScope, SymbolSection,
+    SectionIndex, SectionKind, Symbol, SymbolKind, SymbolScope, SymbolSection,
 };
 
 use crate::obj::{
+    split_meta::{SplitMeta, SPLITMETA_SECTION},
     ObjArchitecture, ObjInfo, ObjReloc, ObjRelocKind, ObjSection, ObjSectionKind, ObjSymbol,
     ObjSymbolFlagSet, ObjSymbolFlags,
 };
@@ -23,7 +24,12 @@ fn to_obj_section_kind(kind: SectionKind) -> Option<ObjSectionKind> {
     }
 }
 
-fn to_obj_symbol(obj_file: &File<'_>, symbol: &Symbol<'_, '_>, addend: i64) -> Result<ObjSymbol> {
+fn to_obj_symbol(
+    obj_file: &File<'_>,
+    symbol: &Symbol<'_, '_>,
+    addend: i64,
+    split_meta: Option<&SplitMeta>,
+) -> Result<ObjSymbol> {
     let mut name = symbol.name().context("Failed to process symbol name")?;
     if name.is_empty() {
         log::warn!("Found empty sym: {symbol:?}");
@@ -57,6 +63,10 @@ fn to_obj_symbol(obj_file: &File<'_>, symbol: &Symbol<'_, '_>, addend: i64) -> R
     if obj_file.architecture() == Architecture::PowerPc {
         demangled_name = cwdemangle::demangle(name, &Default::default());
     }
+    // Find the virtual address for the symbol if available
+    let virtual_address = split_meta
+        .and_then(|m| m.virtual_addresses.as_ref())
+        .and_then(|v| v.get(symbol.index().0).cloned());
     Ok(ObjSymbol {
         name: name.to_string(),
         demangled_name,
@@ -66,13 +76,14 @@ fn to_obj_symbol(obj_file: &File<'_>, symbol: &Symbol<'_, '_>, addend: i64) -> R
         size_known: symbol.size() != 0,
         flags,
         addend,
+        virtual_address,
         diff_symbol: None,
         instructions: vec![],
         match_percent: None,
     })
 }
 
-fn filter_sections(obj_file: &File<'_>) -> Result<Vec<ObjSection>> {
+fn filter_sections(obj_file: &File<'_>, split_meta: Option<&SplitMeta>) -> Result<Vec<ObjSection>> {
     let mut result = Vec::<ObjSection>::new();
     for section in obj_file.sections() {
         if section.size() == 0 {
@@ -83,6 +94,17 @@ fn filter_sections(obj_file: &File<'_>) -> Result<Vec<ObjSection>> {
         };
         let name = section.name().context("Failed to process section name")?;
         let data = section.uncompressed_data().context("Failed to read section data")?;
+
+        // Find the virtual address for the section symbol if available
+        let section_symbol = obj_file.symbols().find(|s| {
+            s.kind() == SymbolKind::Section && s.section_index() == Some(section.index())
+        });
+        let virtual_address = section_symbol.and_then(|s| {
+            split_meta
+                .and_then(|m| m.virtual_addresses.as_ref())
+                .and_then(|v| v.get(s.index().0).cloned())
+        });
+
         result.push(ObjSection {
             name: name.to_string(),
             kind,
@@ -92,6 +114,7 @@ fn filter_sections(obj_file: &File<'_>) -> Result<Vec<ObjSection>> {
             index: section.index().0,
             symbols: Vec::new(),
             relocations: Vec::new(),
+            virtual_address,
             data_diff: vec![],
             match_percent: 0.0,
         });
@@ -100,7 +123,11 @@ fn filter_sections(obj_file: &File<'_>) -> Result<Vec<ObjSection>> {
     Ok(result)
 }
 
-fn symbols_by_section(obj_file: &File<'_>, section: &ObjSection) -> Result<Vec<ObjSymbol>> {
+fn symbols_by_section(
+    obj_file: &File<'_>,
+    section: &ObjSection,
+    split_meta: Option<&SplitMeta>,
+) -> Result<Vec<ObjSymbol>> {
     let mut result = Vec::<ObjSymbol>::new();
     for symbol in obj_file.symbols() {
         if symbol.kind() == SymbolKind::Section {
@@ -115,7 +142,7 @@ fn symbols_by_section(obj_file: &File<'_>, section: &ObjSection) -> Result<Vec<O
                         continue;
                     }
                 }
-                result.push(to_obj_symbol(obj_file, &symbol, 0)?);
+                result.push(to_obj_symbol(obj_file, &symbol, 0, split_meta)?);
             }
         }
     }
@@ -133,11 +160,11 @@ fn symbols_by_section(obj_file: &File<'_>, section: &ObjSection) -> Result<Vec<O
     Ok(result)
 }
 
-fn common_symbols(obj_file: &File<'_>) -> Result<Vec<ObjSymbol>> {
+fn common_symbols(obj_file: &File<'_>, split_meta: Option<&SplitMeta>) -> Result<Vec<ObjSymbol>> {
     obj_file
         .symbols()
         .filter(Symbol::is_common)
-        .map(|symbol| to_obj_symbol(obj_file, &symbol, 0))
+        .map(|symbol| to_obj_symbol(obj_file, &symbol, 0, split_meta))
         .collect::<Result<Vec<ObjSymbol>>>()
 }
 
@@ -145,6 +172,7 @@ fn find_section_symbol(
     obj_file: &File<'_>,
     target: &Symbol<'_, '_>,
     address: u64,
+    split_meta: Option<&SplitMeta>,
 ) -> Result<ObjSymbol> {
     let section_index =
         target.section_index().ok_or_else(|| anyhow::Error::msg("Unknown section index"))?;
@@ -164,7 +192,7 @@ fn find_section_symbol(
             }
             continue;
         }
-        return to_obj_symbol(obj_file, &symbol, 0);
+        return to_obj_symbol(obj_file, &symbol, 0, split_meta);
     }
     let (name, offset) = closest_symbol
         .and_then(|s| s.name().map(|n| (n, s.address())).ok())
@@ -180,6 +208,7 @@ fn find_section_symbol(
         size_known: false,
         flags: Default::default(),
         addend: offset_addr as i64,
+        virtual_address: None,
         diff_symbol: None,
         instructions: vec![],
         match_percent: None,
@@ -190,6 +219,7 @@ fn relocations_by_section(
     arch: ObjArchitecture,
     obj_file: &File<'_>,
     section: &ObjSection,
+    split_meta: Option<&SplitMeta>,
 ) -> Result<Vec<ObjReloc>> {
     let obj_section = obj_file.section_by_index(SectionIndex(section.index))?;
     let mut relocations = Vec::<ObjReloc>::new();
@@ -259,11 +289,11 @@ fn relocations_by_section(
         // println!("Reloc: {reloc:?}, symbol: {symbol:?}, addend: {addend:#X}");
         let target = match symbol.kind() {
             SymbolKind::Text | SymbolKind::Data | SymbolKind::Label | SymbolKind::Unknown => {
-                to_obj_symbol(obj_file, &symbol, addend)
+                to_obj_symbol(obj_file, &symbol, addend, split_meta)
             }
             SymbolKind::Section => {
                 ensure!(addend >= 0, "Negative addend in reloc: {addend}");
-                find_section_symbol(obj_file, &symbol, addend as u64)
+                find_section_symbol(obj_file, &symbol, addend as u64, split_meta)
             }
             kind => Err(anyhow!("Unhandled relocation symbol type {kind:?}")),
         }?;
@@ -298,6 +328,7 @@ fn line_info(obj_file: &File<'_>) -> Result<Option<BTreeMap<u64, u64>>> {
     // DWARF 2+
     #[cfg(feature = "dwarf")]
     {
+        use std::borrow::Cow;
         let dwarf_cow = gimli::Dwarf::load(|id| {
             Ok::<_, gimli::Error>(
                 obj_file
@@ -307,8 +338,8 @@ fn line_info(obj_file: &File<'_>) -> Result<Option<BTreeMap<u64, u64>>> {
             )
         })?;
         let endian = match obj_file.endianness() {
-            Endianness::Little => gimli::RunTimeEndian::Little,
+            object::Endianness::Little => gimli::RunTimeEndian::Little,
-            Endianness::Big => gimli::RunTimeEndian::Big,
+            object::Endianness::Big => gimli::RunTimeEndian::Big,
         };
         let dwarf = dwarf_cow.borrow(|section| gimli::EndianSlice::new(section, endian));
         let mut iter = dwarf.units();
@@ -344,17 +375,35 @@ pub fn read(obj_path: &Path) -> Result<ObjInfo> {
         Architecture::Mips => ObjArchitecture::Mips,
         _ => bail!("Unsupported architecture: {:?}", obj_file.architecture()),
     };
+    let split_meta = split_meta(&obj_file)?;
     let mut result = ObjInfo {
         architecture,
         path: obj_path.to_owned(),
         timestamp,
-        sections: filter_sections(&obj_file)?,
+        sections: filter_sections(&obj_file, split_meta.as_ref())?,
-        common: common_symbols(&obj_file)?,
+        common: common_symbols(&obj_file, split_meta.as_ref())?,
         line_info: line_info(&obj_file)?,
+        split_meta: None,
     };
     for section in &mut result.sections {
-        section.symbols = symbols_by_section(&obj_file, section)?;
+        section.symbols = symbols_by_section(&obj_file, section, split_meta.as_ref())?;
-        section.relocations = relocations_by_section(architecture, &obj_file, section)?;
+        section.relocations =
+            relocations_by_section(architecture, &obj_file, section, split_meta.as_ref())?;
     }
+    result.split_meta = split_meta;
     Ok(result)
 }
+
+fn split_meta(obj_file: &File<'_>) -> Result<Option<SplitMeta>> {
+    Ok(if let Some(section) = obj_file.section_by_name(SPLITMETA_SECTION) {
+        if section.size() != 0 {
+            let data = section.uncompressed_data()?;
+            let mut reader = data.as_ref();
+            Some(SplitMeta::from_reader(&mut reader, obj_file.endianness(), obj_file.is_64())?)
+        } else {
+            None
+        }
+    } else {
+        None
+    })
+}

objdiff-core/src/obj/mod.rs

@@ -3,11 +3,13 @@ pub mod elf;
 pub mod mips;
 #[cfg(feature = "ppc")]
 pub mod ppc;
+pub mod split_meta;
 
 use std::{collections::BTreeMap, fmt, path::PathBuf};
 
 use filetime::FileTime;
 use flagset::{flags, FlagSet};
+use split_meta::SplitMeta;
 
 use crate::util::ReallySigned;
 
@@ -39,6 +41,7 @@ pub struct ObjSection {
     pub index: usize,
     pub symbols: Vec<ObjSymbol>,
     pub relocations: Vec<ObjReloc>,
+    pub virtual_address: Option<u64>,
 
     // Diff
     pub data_diff: Vec<ObjDataDiff>,
@@ -139,7 +142,7 @@ pub struct ObjIns {
     pub args: Vec<ObjInsArg>,
     pub reloc: Option<ObjReloc>,
     pub branch_dest: Option<u32>,
-    /// Line info
+    /// Line number
     pub line: Option<u64>,
     /// Original (unsimplified) instruction
     pub orig: Option<String>,
@@ -185,6 +188,8 @@ pub struct ObjSymbol {
     pub size_known: bool,
     pub flags: ObjSymbolFlagSet,
     pub addend: i64,
+    /// Original virtual address (from .splitmeta section)
+    pub virtual_address: Option<u64>,
 
     // Diff
     pub diff_symbol: Option<String>,
@@ -206,8 +211,12 @@ pub struct ObjInfo {
     pub path: PathBuf,
     pub timestamp: FileTime,
     pub sections: Vec<ObjSection>,
+    /// Common BSS symbols
     pub common: Vec<ObjSymbol>,
+    /// Line number info (.line or .debug_line section)
     pub line_info: Option<BTreeMap<u64, u64>>,
+    /// Split object metadata (.splitmeta section)
+    pub split_meta: Option<SplitMeta>,
 }
 
 #[derive(Debug, Eq, PartialEq, Copy, Clone)]

objdiff-core/src/obj/split_meta.rs

@@ -0,0 +1,169 @@
+use std::{
+    io,
+    io::{Read, Write},
+};
+
+use object::{elf::SHT_LOUSER, Endian};
+
+pub const SPLITMETA_SECTION: &str = ".splitmeta";
+// Use the same section type as .mwcats.* so the linker ignores it
+pub const SHT_SPLITMETA: u32 = SHT_LOUSER + 0x4A2A82C2;
+
+/// This is used to store metadata about the source of an object file,
+/// such as the original virtual addresses and the tool that wrote it.
+#[derive(Debug, Default, Clone)]
+pub struct SplitMeta {
+    /// The tool that generated the object. Informational only.
+    pub generator: Option<String>,
+    /// The name of the source module. (e.g. the DOL or REL name)
+    pub module_name: Option<String>,
+    /// The ID of the source module. (e.g. the DOL or REL ID)
+    pub module_id: Option<u32>,
+    /// Original virtual addresses of each symbol in the object.
+    /// Index 0 is the ELF null symbol.
+    pub virtual_addresses: Option<Vec<u64>>,
+}
+
+/**
+ * .splitmeta section format:
+ * - Magic: "SPMD"
+ * - Section: Magic: 4 bytes, Data size: 4 bytes, Data: variable
+ *     Section size can be used to skip unknown sections
+ * - Repeat section until EOF
+ * Endianness matches the object file
+ *
+ * Sections:
+ * - Generator: Magic: "GENR", Data size: 4 bytes, Data: UTF-8 string (no null terminator)
+ * - Virtual addresses: Magic: "VIRT", Data size: 4 bytes, Data: array
+ *     Data is u32 array for 32-bit objects, u64 array for 64-bit objects
+ *     Count is size / 4 (32-bit) or size / 8 (64-bit)
+ */
+
+const SPLIT_META_MAGIC: [u8; 4] = *b"SPMD";
+const GENERATOR_MAGIC: [u8; 4] = *b"GENR";
+const MODULE_NAME_MAGIC: [u8; 4] = *b"MODN";
+const MODULE_ID_MAGIC: [u8; 4] = *b"MODI";
+const VIRTUAL_ADDRESS_MAGIC: [u8; 4] = *b"VIRT";
+
+impl SplitMeta {
+    pub fn from_reader<E, R>(reader: &mut R, e: E, is_64: bool) -> io::Result<Self>
+    where
+        E: Endian,
+        R: Read + ?Sized,
+    {
+        let mut magic = [0; 4];
+        reader.read_exact(&mut magic)?;
+        if magic != SPLIT_META_MAGIC {
+            return Err(io::Error::new(io::ErrorKind::InvalidData, "Invalid split metadata magic"));
+        }
+        let mut result = SplitMeta::default();
+        loop {
+            let mut magic = [0; 4];
+            match reader.read_exact(&mut magic) {
+                Ok(()) => {}
+                Err(e) if e.kind() == io::ErrorKind::UnexpectedEof => break,
+                Err(e) => return Err(e),
+            };
+            let mut size_bytes = [0; 4];
+            reader.read_exact(&mut size_bytes)?;
+            let size = e.read_u32_bytes(size_bytes);
+            let mut data = vec![0; size as usize];
+            reader.read_exact(&mut data)?;
+            match magic {
+                GENERATOR_MAGIC => {
+                    let string = String::from_utf8(data)
+                        .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
+                    result.generator = Some(string);
+                }
+                MODULE_NAME_MAGIC => {
+                    let string = String::from_utf8(data)
+                        .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
+                    result.module_name = Some(string);
+                }
+                MODULE_ID_MAGIC => {
+                    let id = e.read_u32_bytes(data.as_slice().try_into().map_err(|_| {
+                        io::Error::new(io::ErrorKind::InvalidData, "Invalid module ID size")
+                    })?);
+                    result.module_id = Some(id);
+                }
+                VIRTUAL_ADDRESS_MAGIC => {
+                    let vec = if is_64 {
+                        let mut vec = vec![0u64; data.len() / 8];
+                        for i in 0..vec.len() {
+                            vec[i] = e.read_u64_bytes(data[i * 8..(i + 1) * 8].try_into().unwrap());
+                        }
+                        vec
+                    } else {
+                        let mut vec = vec![0u64; data.len() / 4];
+                        for i in 0..vec.len() {
+                            vec[i] = e.read_u32_bytes(data[i * 4..(i + 1) * 4].try_into().unwrap())
+                                as u64;
+                        }
+                        vec
+                    };
+                    result.virtual_addresses = Some(vec);
+                }
+                _ => {
+                    // Ignore unknown sections
+                }
+            }
+        }
+        Ok(result)
+    }
+
+    pub fn to_writer<E, W>(&self, writer: &mut W, e: E, is_64: bool) -> io::Result<()>
+    where
+        E: Endian,
+        W: Write + ?Sized,
+    {
+        writer.write_all(&SPLIT_META_MAGIC)?;
+        if let Some(generator) = &self.generator {
+            writer.write_all(&GENERATOR_MAGIC)?;
+            writer.write_all(&e.write_u32_bytes(generator.len() as u32))?;
+            writer.write_all(generator.as_bytes())?;
+        }
+        if let Some(module_name) = &self.module_name {
+            writer.write_all(&MODULE_NAME_MAGIC)?;
+            writer.write_all(&e.write_u32_bytes(module_name.len() as u32))?;
+            writer.write_all(module_name.as_bytes())?;
+        }
+        if let Some(module_id) = self.module_id {
+            writer.write_all(&MODULE_ID_MAGIC)?;
+            writer.write_all(&e.write_u32_bytes(4))?;
+            writer.write_all(&e.write_u32_bytes(module_id))?;
+        }
+        if let Some(virtual_addresses) = &self.virtual_addresses {
+            writer.write_all(&VIRTUAL_ADDRESS_MAGIC)?;
+            let count = virtual_addresses.len() as u32;
+            if is_64 {
+                writer.write_all(&e.write_u32_bytes(count * 8))?;
+                for &addr in virtual_addresses {
+                    writer.write_all(&e.write_u64_bytes(addr))?;
+                }
+            } else {
+                writer.write_all(&e.write_u32_bytes(count * 4))?;
+                for &addr in virtual_addresses {
+                    writer.write_all(&e.write_u32_bytes(addr as u32))?;
+                }
+            }
+        }
+        Ok(())
+    }
+
+    pub fn write_size(&self, is_64: bool) -> usize {
+        let mut size = 4;
+        if let Some(generator) = self.generator.as_deref() {
+            size += 8 + generator.len();
+        }
+        if let Some(module_name) = self.module_name.as_deref() {
+            size += 8 + module_name.len();
+        }
+        if self.module_id.is_some() {
+            size += 12;
+        }
+        if let Some(virtual_addresses) = self.virtual_addresses.as_deref() {
+            size += 8 + if is_64 { 8 } else { 4 } * virtual_addresses.len();
+        }
+        size
+    }
+}

objdiff-gui/src/views/function_diff.rs

@@ -3,7 +3,7 @@ use std::default::Default;
 use egui::{text::LayoutJob, Align, Label, Layout, Sense, Vec2, Widget};
 use egui_extras::{Column, TableBuilder, TableRow};
 use objdiff_core::{
-    diff::display::{display_diff, DiffText},
+    diff::display::{display_diff, DiffText, HighlightKind},
     obj::{ObjInfo, ObjIns, ObjInsArg, ObjInsArgValue, ObjInsDiff, ObjInsDiffKind, ObjSymbol},
 };
 use time::format_description;
@@ -13,29 +13,6 @@ use crate::views::{
     symbol_diff::{match_color_for_symbol, DiffViewState, SymbolReference, View},
 };
 
-#[derive(Default)]
-pub enum HighlightKind {
-    #[default]
-    None,
-    Opcode(u8),
-    Arg(ObjInsArgValue),
-    Symbol(String),
-    Address(u32),
-}
-
-impl PartialEq for HighlightKind {
-    fn eq(&self, other: &Self) -> bool {
-        match (self, other) {
-            (HighlightKind::None, HighlightKind::None) => false,
-            (HighlightKind::Opcode(a), HighlightKind::Opcode(b)) => a == b,
-            (HighlightKind::Arg(a), HighlightKind::Arg(b)) => a.loose_eq(b),
-            (HighlightKind::Symbol(a), HighlightKind::Symbol(b)) => a == b,
-            (HighlightKind::Address(a), HighlightKind::Address(b)) => a == b,
-            _ => false,
-        }
-    }
-}
-
 #[derive(Default)]
 pub struct FunctionViewState {
     pub highlight: HighlightKind,
@@ -159,7 +136,6 @@ fn diff_text_ui(
         ObjInsDiffKind::Insert => appearance.insert_color,
     };
     let mut pad_to = 0;
-    let mut highlight_kind = HighlightKind::None;
     match text {
         DiffText::Basic(text) => {
             label_text = text.to_string();
@@ -176,32 +152,27 @@ fn diff_text_ui(
         DiffText::Address(addr) => {
             label_text = format!("{:x}:", addr);
             pad_to = 5;
-            highlight_kind = HighlightKind::Address(addr);
         }
-        DiffText::Opcode(mnemonic, op) => {
+        DiffText::Opcode(mnemonic, _op) => {
             label_text = mnemonic.to_string();
             if ins_diff.kind == ObjInsDiffKind::OpMismatch {
                 base_color = appearance.replace_color;
             }
             pad_to = 8;
-            highlight_kind = HighlightKind::Opcode(op);
         }
         DiffText::Argument(arg, diff) => {
             label_text = arg.to_string();
             if let Some(diff) = diff {
                 base_color = appearance.diff_colors[diff.idx % appearance.diff_colors.len()]
             }
-            highlight_kind = HighlightKind::Arg(arg.clone());
         }
         DiffText::BranchTarget(addr) => {
             label_text = format!("{addr:x}");
-            highlight_kind = HighlightKind::Address(addr);
         }
         DiffText::Symbol(sym) => {
             let name = sym.demangled_name.as_ref().unwrap_or(&sym.name);
             label_text = name.clone();
             base_color = appearance.emphasized_text_color;
-            highlight_kind = HighlightKind::Symbol(name.clone());
         }
         DiffText::Spacing(n) => {
             ui.add_space(n as f32 * space_width);
@@ -213,7 +184,7 @@ fn diff_text_ui(
     }
 
     let len = label_text.len();
-    let highlight = ins_view_state.highlight == highlight_kind;
+    let highlight = ins_view_state.highlight == text;
     let response = Label::new(LayoutJob::single_section(
         label_text,
         appearance.code_text_format(base_color, highlight),
@@ -225,7 +196,7 @@ fn diff_text_ui(
         if highlight {
             ins_view_state.highlight = HighlightKind::None;
         } else {
-            ins_view_state.highlight = highlight_kind;
+            ins_view_state.highlight = text.into();
         }
     }
     if len < pad_to {

objdiff-gui/src/views/symbol_diff.rs

@@ -143,6 +143,12 @@ fn symbol_context_menu_ui(ui: &mut Ui, symbol: &ObjSymbol) {
             ui.output_mut(|output| output.copied_text = symbol.name.clone());
             ui.close_menu();
         }
+        if let Some(address) = symbol.virtual_address {
+            if ui.button(format!("Copy \"{:#x}\" (virtual address)", address)).clicked() {
+                ui.output_mut(|output| output.copied_text = format!("{:#x}", address));
+                ui.close_menu();
+            }
+        }
     });
 }
 
@@ -161,6 +167,12 @@ fn symbol_hover_ui(ui: &mut Ui, symbol: &ObjSymbol, appearance: &Appearance) {
                 format!("Size: {:x} (assumed)", symbol.size),
             );
         }
+        if let Some(address) = symbol.virtual_address {
+            ui.colored_label(
+                appearance.highlight_color,
+                format!("Virtual address: {:#x}", address),
+            );
+        }
     });
 }