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

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- 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
This commit is contained in:
Luke Street
2024-02-28 21:44:53 -07:00
parent 28348606bf
commit 39a13f4d36
11 changed files with 1018 additions and 406 deletions
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objdiff-core/src/obj/elf.rs
+67 -18
View File
@@ -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,
RelocationTarget, SectionIndex, SectionKind, Symbol, SymbolKind, SymbolScope, SymbolSection,
elf, Architecture, File, Object, ObjectSection, ObjectSymbol, RelocationKind, RelocationTarget,
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,
Endianness::Big => gimli::RunTimeEndian::Big,
object::Endianness::Little => gimli::RunTimeEndian::Little,
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)?,
common: common_symbols(&obj_file)?,
sections: filter_sections(&obj_file, split_meta.as_ref())?,
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.relocations = relocations_by_section(architecture, &obj_file, section)?;
section.symbols = symbols_by_section(&obj_file, section, split_meta.as_ref())?;
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
})
}