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Fix data section not showing when there is no section on the other side

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This commit is contained in:
LagoLunatic 2025-08-06 16:09:18 -04:00
parent a015971c20
commit 34e4513c69
2 changed files with 102 additions and 44 deletions
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26
objdiff-core/src/diff/data.rs
View File

@ -127,6 +127,28 @@ fn diff_data_relocs_for_range<'left, 'right>(
diffs
}
pub fn no_diff_data_section(obj: &Object, section_idx: usize) -> Result<SectionDiff> {
let section = &obj.sections[section_idx];
let len = section.data.len();
let data = &section.data[0..len];
let data_diff =
vec![DataDiff { data: data.to_vec(), kind: DataDiffKind::None, len, ..Default::default() }];
let mut reloc_diffs = Vec::new();
for reloc in section.relocations.iter() {
let reloc_len = obj.arch.data_reloc_size(reloc.flags);
let range = reloc.address as usize..reloc.address as usize + reloc_len;
reloc_diffs.push(DataRelocationDiff {
reloc: reloc.clone(),
kind: DataDiffKind::None,
range,
});
}
Ok(SectionDiff { match_percent: Some(0.0), data_diff, reloc_diff: reloc_diffs })
}
/// Compare the data sections of two object files.
pub fn diff_data_section(
left_obj: &Object,
@ -415,6 +437,10 @@ pub fn diff_generic_section(
))
}
pub fn no_diff_bss_section() -> Result<SectionDiff> {
Ok(SectionDiff { match_percent: Some(0.0), data_diff: vec![], reloc_diff: vec![] })
}
/// Compare the addresses and sizes of each symbol in the BSS sections.
pub fn diff_bss_section(
left_obj: &Object,

40
objdiff-core/src/diff/mod.rs
View File

@ -13,7 +13,7 @@ use crate::{
code::{diff_code, no_diff_code},
data::{
diff_bss_section, diff_bss_symbol, diff_data_section, diff_data_symbol,
diff_generic_section,
diff_generic_section, no_diff_bss_section, no_diff_data_section,
},
},
obj::{InstructionRef, Object, Relocation, SectionKind, Symbol, SymbolFlag},
@ -288,12 +288,12 @@ pub fn diff_objs(
}
for section_match in section_matches {
if let SectionMatch {
match section_match {
SectionMatch {
left: Some(left_section_idx),
right: Some(right_section_idx),
section_kind,
} = section_match
{
} => {
let (left_obj, left_out) = left.as_mut().unwrap();
let (right_obj, right_out) = right.as_mut().unwrap();
match section_kind {
@ -336,6 +336,38 @@ pub fn diff_objs(
SectionKind::Unknown => unreachable!(),
}
}
SectionMatch { left: Some(left_section_idx), right: None, section_kind } => {
let (left_obj, left_out) = left.as_mut().unwrap();
match section_kind {
SectionKind::Code => {}
SectionKind::Data => {
left_out.sections[left_section_idx] =
no_diff_data_section(left_obj, left_section_idx)?;
}
SectionKind::Bss | SectionKind::Common => {
left_out.sections[left_section_idx] = no_diff_bss_section()?;
}
SectionKind::Unknown => unreachable!(),
}
}
SectionMatch { left: None, right: Some(right_section_idx), section_kind } => {
let (right_obj, right_out) = right.as_mut().unwrap();
match section_kind {
SectionKind::Code => {}
SectionKind::Data => {
right_out.sections[right_section_idx] =
no_diff_data_section(right_obj, right_section_idx)?;
}
SectionKind::Bss | SectionKind::Common => {
right_out.sections[right_section_idx] = no_diff_bss_section()?;
}
SectionKind::Unknown => unreachable!(),
}
}
SectionMatch { left: None, right: None, .. } => {
// Should not happen
}
}
}
if let (Some((right_obj, right_out)), Some((left_obj, left_out))) =