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mod.rs
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927 lines (879 loc) · 30.7 KB
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use std::collections::HashSet;
use anyhow::Result;
use crate::{
config::SymbolMappings,
diff::{
code::{diff_code, no_diff_code, process_code_symbol},
data::{
diff_bss_section, diff_bss_symbol, diff_data_section, diff_data_symbol,
diff_generic_section, no_diff_symbol,
},
},
obj::{ObjInfo, ObjIns, ObjSection, ObjSectionKind, ObjSymbol, SymbolRef, SECTION_COMMON},
};
pub mod code;
pub mod data;
pub mod display;
#[derive(
Debug,
Copy,
Clone,
Default,
Eq,
PartialEq,
serde::Deserialize,
serde::Serialize,
strum::VariantArray,
strum::EnumMessage,
)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
pub enum X86Formatter {
#[default]
#[strum(message = "Intel (default)")]
Intel,
#[strum(message = "AT&T")]
Gas,
#[strum(message = "NASM")]
Nasm,
#[strum(message = "MASM")]
Masm,
}
#[derive(
Debug,
Copy,
Clone,
Default,
Eq,
PartialEq,
serde::Deserialize,
serde::Serialize,
strum::VariantArray,
strum::EnumMessage,
)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
pub enum MipsAbi {
#[default]
#[strum(message = "Auto (default)")]
Auto,
#[strum(message = "O32")]
O32,
#[strum(message = "N32")]
N32,
#[strum(message = "N64")]
N64,
}
#[derive(
Debug,
Copy,
Clone,
Default,
Eq,
PartialEq,
serde::Deserialize,
serde::Serialize,
strum::VariantArray,
strum::EnumMessage,
)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
pub enum MipsInstrCategory {
#[default]
#[strum(message = "Auto (default)")]
Auto,
#[strum(message = "CPU")]
Cpu,
#[strum(message = "RSP (N64)")]
Rsp,
#[strum(message = "R3000 GTE (PS1)")]
R3000Gte,
#[strum(message = "R4000 ALLEGREX (PSP)")]
R4000Allegrex,
#[strum(message = "R5900 EE (PS2)")]
R5900,
}
#[derive(
Debug,
Copy,
Clone,
Default,
Eq,
PartialEq,
serde::Deserialize,
serde::Serialize,
strum::VariantArray,
strum::EnumMessage,
)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
pub enum ArmArchVersion {
#[default]
#[strum(message = "Auto (default)")]
Auto,
#[strum(message = "ARMv4T (GBA)")]
V4T,
#[strum(message = "ARMv5TE (DS)")]
V5TE,
#[strum(message = "ARMv6K (3DS)")]
V6K,
}
#[derive(
Debug,
Copy,
Clone,
Default,
Eq,
PartialEq,
serde::Deserialize,
serde::Serialize,
strum::VariantArray,
strum::EnumMessage,
)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
pub enum ArmR9Usage {
#[default]
#[strum(
message = "R9 or V6 (default)",
detailed_message = "Use R9 as a general-purpose register."
)]
GeneralPurpose,
#[strum(
message = "SB (static base)",
detailed_message = "Used for position-independent data (PID)."
)]
Sb,
#[strum(message = "TR (TLS register)", detailed_message = "Used for thread-local storage.")]
Tr,
}
#[inline]
const fn default_true() -> bool { true }
#[derive(Debug, Clone, Eq, PartialEq, serde::Deserialize, serde::Serialize)]
#[cfg_attr(feature = "wasm", derive(tsify_next::Tsify))]
#[cfg_attr(feature = "wasm", tsify(from_wasm_abi))]
#[serde(default)]
pub struct DiffObjConfig {
pub relax_reloc_diffs: bool,
#[serde(default = "default_true")]
pub space_between_args: bool,
pub combine_data_sections: bool,
#[serde(default)]
pub symbol_mappings: MappingConfig,
// x86
pub x86_formatter: X86Formatter,
// MIPS
pub mips_abi: MipsAbi,
pub mips_instr_category: MipsInstrCategory,
// ARM
pub arm_arch_version: ArmArchVersion,
pub arm_unified_syntax: bool,
pub arm_av_registers: bool,
pub arm_r9_usage: ArmR9Usage,
pub arm_sl_usage: bool,
pub arm_fp_usage: bool,
pub arm_ip_usage: bool,
}
impl Default for DiffObjConfig {
fn default() -> Self {
Self {
relax_reloc_diffs: false,
space_between_args: true,
combine_data_sections: false,
symbol_mappings: Default::default(),
x86_formatter: Default::default(),
mips_abi: Default::default(),
mips_instr_category: Default::default(),
arm_arch_version: Default::default(),
arm_unified_syntax: true,
arm_av_registers: false,
arm_r9_usage: Default::default(),
arm_sl_usage: false,
arm_fp_usage: false,
arm_ip_usage: false,
}
}
}
impl DiffObjConfig {
pub fn separator(&self) -> &'static str {
if self.space_between_args {
", "
} else {
","
}
}
}
#[derive(Debug, Clone)]
pub struct ObjSectionDiff {
pub symbols: Vec<ObjSymbolDiff>,
pub data_diff: Vec<ObjDataDiff>,
pub match_percent: Option<f32>,
}
impl ObjSectionDiff {
fn merge(&mut self, other: ObjSectionDiff) {
// symbols ignored
self.data_diff = other.data_diff;
self.match_percent = other.match_percent;
}
}
#[derive(Debug, Clone, Default)]
pub struct ObjSymbolDiff {
/// The symbol ref this object
pub symbol_ref: SymbolRef,
/// The symbol ref in the _other_ object that this symbol was diffed against
pub target_symbol: Option<SymbolRef>,
pub instructions: Vec<ObjInsDiff>,
pub match_percent: Option<f32>,
}
#[derive(Debug, Clone, Default)]
pub struct ObjInsDiff {
pub ins: Option<ObjIns>,
/// Diff kind
pub kind: ObjInsDiffKind,
/// Branches from instruction
pub branch_from: Option<ObjInsBranchFrom>,
/// Branches to instruction
pub branch_to: Option<ObjInsBranchTo>,
/// Arg diffs (only contains non-PlainText args)
pub arg_diff: Vec<Option<ObjInsArgDiff>>,
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Default)]
pub enum ObjInsDiffKind {
#[default]
None,
OpMismatch,
ArgMismatch,
Replace,
Delete,
Insert,
}
#[derive(Debug, Clone, Default)]
pub struct ObjDataDiff {
pub data: Vec<u8>,
pub kind: ObjDataDiffKind,
pub len: usize,
pub symbol: String,
}
#[derive(Debug, Copy, Clone, Eq, PartialEq, Default)]
pub enum ObjDataDiffKind {
#[default]
None,
Replace,
Delete,
Insert,
}
#[derive(Debug, Copy, Clone)]
pub struct ObjInsArgDiff {
/// Incrementing index for coloring
pub idx: usize,
}
#[derive(Debug, Clone)]
pub struct ObjInsBranchFrom {
/// Source instruction indices
pub ins_idx: Vec<usize>,
/// Incrementing index for coloring
pub branch_idx: usize,
}
#[derive(Debug, Clone)]
pub struct ObjInsBranchTo {
/// Target instruction index
pub ins_idx: usize,
/// Incrementing index for coloring
pub branch_idx: usize,
}
#[derive(Default)]
pub struct ObjDiff {
/// A list of all section diffs in the object.
pub sections: Vec<ObjSectionDiff>,
/// Common BSS symbols don't live in a section, so they're stored separately.
pub common: Vec<ObjSymbolDiff>,
/// If `selecting_left` or `selecting_right` is set, this is the list of symbols
/// that are being mapped to the other object.
pub mapping_symbols: Vec<ObjSymbolDiff>,
}
impl ObjDiff {
pub fn new_from_obj(obj: &ObjInfo) -> Self {
let mut result = Self {
sections: Vec::with_capacity(obj.sections.len()),
common: Vec::with_capacity(obj.common.len()),
mapping_symbols: vec![],
};
for (section_idx, section) in obj.sections.iter().enumerate() {
let mut symbols = Vec::with_capacity(section.symbols.len());
for (symbol_idx, _) in section.symbols.iter().enumerate() {
symbols.push(ObjSymbolDiff {
symbol_ref: SymbolRef { section_idx, symbol_idx },
target_symbol: None,
instructions: vec![],
match_percent: None,
});
}
result.sections.push(ObjSectionDiff {
symbols,
data_diff: vec![ObjDataDiff {
data: section.data.clone(),
kind: ObjDataDiffKind::None,
len: section.data.len(),
symbol: section.name.clone(),
}],
match_percent: None,
});
}
for (symbol_idx, _) in obj.common.iter().enumerate() {
result.common.push(ObjSymbolDiff {
symbol_ref: SymbolRef { section_idx: SECTION_COMMON, symbol_idx },
target_symbol: None,
instructions: vec![],
match_percent: None,
});
}
result
}
#[inline]
pub fn section_diff(&self, section_idx: usize) -> &ObjSectionDiff {
&self.sections[section_idx]
}
#[inline]
pub fn section_diff_mut(&mut self, section_idx: usize) -> &mut ObjSectionDiff {
&mut self.sections[section_idx]
}
#[inline]
pub fn symbol_diff(&self, symbol_ref: SymbolRef) -> &ObjSymbolDiff {
if symbol_ref.section_idx == SECTION_COMMON {
&self.common[symbol_ref.symbol_idx]
} else {
&self.section_diff(symbol_ref.section_idx).symbols[symbol_ref.symbol_idx]
}
}
#[inline]
pub fn symbol_diff_mut(&mut self, symbol_ref: SymbolRef) -> &mut ObjSymbolDiff {
if symbol_ref.section_idx == SECTION_COMMON {
&mut self.common[symbol_ref.symbol_idx]
} else {
&mut self.section_diff_mut(symbol_ref.section_idx).symbols[symbol_ref.symbol_idx]
}
}
}
#[derive(Default)]
pub struct DiffObjsResult {
pub left: Option<ObjDiff>,
pub right: Option<ObjDiff>,
pub prev: Option<ObjDiff>,
}
pub fn diff_objs(
config: &DiffObjConfig,
left: Option<&ObjInfo>,
right: Option<&ObjInfo>,
prev: Option<&ObjInfo>,
) -> Result<DiffObjsResult> {
let symbol_matches = matching_symbols(left, right, prev, &config.symbol_mappings)?;
let section_matches = matching_sections(left, right)?;
let mut left = left.map(|p| (p, ObjDiff::new_from_obj(p)));
let mut right = right.map(|p| (p, ObjDiff::new_from_obj(p)));
let mut prev = prev.map(|p| (p, ObjDiff::new_from_obj(p)));
for symbol_match in symbol_matches {
match symbol_match {
SymbolMatch {
left: Some(left_symbol_ref),
right: Some(right_symbol_ref),
prev: prev_symbol_ref,
section_kind,
} => {
let (left_obj, left_out) = left.as_mut().unwrap();
let (right_obj, right_out) = right.as_mut().unwrap();
match section_kind {
ObjSectionKind::Code => {
let left_code = process_code_symbol(left_obj, left_symbol_ref, config)?;
let right_code = process_code_symbol(right_obj, right_symbol_ref, config)?;
let (left_diff, right_diff) = diff_code(
left_obj,
right_obj,
&left_code,
&right_code,
left_symbol_ref,
right_symbol_ref,
config,
)?;
*left_out.symbol_diff_mut(left_symbol_ref) = left_diff;
*right_out.symbol_diff_mut(right_symbol_ref) = right_diff;
if let Some(prev_symbol_ref) = prev_symbol_ref {
let (prev_obj, prev_out) = prev.as_mut().unwrap();
let prev_code = process_code_symbol(prev_obj, prev_symbol_ref, config)?;
let (_, prev_diff) = diff_code(
left_obj,
right_obj,
&right_code,
&prev_code,
right_symbol_ref,
prev_symbol_ref,
config,
)?;
*prev_out.symbol_diff_mut(prev_symbol_ref) = prev_diff;
}
}
ObjSectionKind::Data => {
let (left_diff, right_diff) = diff_data_symbol(
left_obj,
right_obj,
left_symbol_ref,
right_symbol_ref,
)?;
*left_out.symbol_diff_mut(left_symbol_ref) = left_diff;
*right_out.symbol_diff_mut(right_symbol_ref) = right_diff;
}
ObjSectionKind::Bss => {
let (left_diff, right_diff) = diff_bss_symbol(
left_obj,
right_obj,
left_symbol_ref,
right_symbol_ref,
)?;
*left_out.symbol_diff_mut(left_symbol_ref) = left_diff;
*right_out.symbol_diff_mut(right_symbol_ref) = right_diff;
}
}
}
SymbolMatch { left: Some(left_symbol_ref), right: None, prev: _, section_kind } => {
let (left_obj, left_out) = left.as_mut().unwrap();
match section_kind {
ObjSectionKind::Code => {
let code = process_code_symbol(left_obj, left_symbol_ref, config)?;
*left_out.symbol_diff_mut(left_symbol_ref) =
no_diff_code(&code, left_symbol_ref)?;
}
ObjSectionKind::Data | ObjSectionKind::Bss => {
*left_out.symbol_diff_mut(left_symbol_ref) =
no_diff_symbol(left_obj, left_symbol_ref);
}
}
}
SymbolMatch { left: None, right: Some(right_symbol_ref), prev: _, section_kind } => {
let (right_obj, right_out) = right.as_mut().unwrap();
match section_kind {
ObjSectionKind::Code => {
let code = process_code_symbol(right_obj, right_symbol_ref, config)?;
*right_out.symbol_diff_mut(right_symbol_ref) =
no_diff_code(&code, right_symbol_ref)?;
}
ObjSectionKind::Data | ObjSectionKind::Bss => {
*right_out.symbol_diff_mut(right_symbol_ref) =
no_diff_symbol(right_obj, right_symbol_ref);
}
}
}
SymbolMatch { left: None, right: None, .. } => {
// Should not happen
}
}
}
for section_match in section_matches {
if let 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();
let left_section = &left_obj.sections[left_section_idx];
let right_section = &right_obj.sections[right_section_idx];
match section_kind {
ObjSectionKind::Code => {
let left_section_diff = left_out.section_diff(left_section_idx);
let right_section_diff = right_out.section_diff(right_section_idx);
let (left_diff, right_diff) = diff_generic_section(
left_section,
right_section,
left_section_diff,
right_section_diff,
)?;
left_out.section_diff_mut(left_section_idx).merge(left_diff);
right_out.section_diff_mut(right_section_idx).merge(right_diff);
}
ObjSectionKind::Data => {
let left_section_diff = left_out.section_diff(left_section_idx);
let right_section_diff = right_out.section_diff(right_section_idx);
let (left_diff, right_diff) = diff_data_section(
left_section,
right_section,
left_section_diff,
right_section_diff,
)?;
left_out.section_diff_mut(left_section_idx).merge(left_diff);
right_out.section_diff_mut(right_section_idx).merge(right_diff);
}
ObjSectionKind::Bss => {
let left_section_diff = left_out.section_diff(left_section_idx);
let right_section_diff = right_out.section_diff(right_section_idx);
let (left_diff, right_diff) = diff_bss_section(
left_section,
right_section,
left_section_diff,
right_section_diff,
)?;
left_out.section_diff_mut(left_section_idx).merge(left_diff);
right_out.section_diff_mut(right_section_idx).merge(right_diff);
}
}
}
}
if let (Some((right_obj, right_out)), Some((left_obj, left_out))) =
(right.as_mut(), left.as_mut())
{
if let Some(right_name) = &config.symbol_mappings.selecting_left {
generate_mapping_symbols(right_obj, right_name, left_obj, left_out, config)?;
}
if let Some(left_name) = &config.symbol_mappings.selecting_right {
generate_mapping_symbols(left_obj, left_name, right_obj, right_out, config)?;
}
}
Ok(DiffObjsResult {
left: left.map(|(_, o)| o),
right: right.map(|(_, o)| o),
prev: prev.map(|(_, o)| o),
})
}
/// When we're selecting a symbol to use as a comparison, we'll create comparisons for all
/// symbols in the other object that match the selected symbol's section and kind. This allows
/// us to display match percentages for all symbols in the other object that could be selected.
fn generate_mapping_symbols(
base_obj: &ObjInfo,
base_name: &str,
target_obj: &ObjInfo,
target_out: &mut ObjDiff,
config: &DiffObjConfig,
) -> Result<()> {
let Some(base_symbol_ref) = symbol_ref_by_name(base_obj, base_name) else {
return Ok(());
};
let (base_section, _base_symbol) = base_obj.section_symbol(base_symbol_ref);
let Some(base_section) = base_section else {
return Ok(());
};
let base_code = match base_section.kind {
ObjSectionKind::Code => Some(process_code_symbol(base_obj, base_symbol_ref, config)?),
_ => None,
};
for (target_section_index, target_section) in
target_obj.sections.iter().enumerate().filter(|(_, s)| s.kind == base_section.kind)
{
for (target_symbol_index, _target_symbol) in target_section.symbols.iter().enumerate() {
let target_symbol_ref =
SymbolRef { section_idx: target_section_index, symbol_idx: target_symbol_index };
match base_section.kind {
ObjSectionKind::Code => {
let target_code = process_code_symbol(target_obj, target_symbol_ref, config)?;
let (left_diff, _right_diff) = diff_code(
target_obj,
base_obj,
&target_code,
base_code.as_ref().unwrap(),
target_symbol_ref,
base_symbol_ref,
config,
)?;
target_out.mapping_symbols.push(left_diff);
}
ObjSectionKind::Data => {
let (left_diff, _right_diff) =
diff_data_symbol(target_obj, base_obj, target_symbol_ref, base_symbol_ref)?;
target_out.mapping_symbols.push(left_diff);
}
ObjSectionKind::Bss => {
let (left_diff, _right_diff) =
diff_bss_symbol(target_obj, base_obj, target_symbol_ref, base_symbol_ref)?;
target_out.mapping_symbols.push(left_diff);
}
}
}
}
Ok(())
}
#[derive(Copy, Clone, Eq, PartialEq)]
struct SymbolMatch {
left: Option<SymbolRef>,
right: Option<SymbolRef>,
prev: Option<SymbolRef>,
section_kind: ObjSectionKind,
}
#[derive(Copy, Clone, Eq, PartialEq)]
struct SectionMatch {
left: Option<usize>,
right: Option<usize>,
section_kind: ObjSectionKind,
}
#[derive(Debug, Clone, PartialEq, Eq, Hash, Default, serde::Deserialize, serde::Serialize)]
pub struct MappingConfig {
/// Manual symbol mappings
pub mappings: SymbolMappings,
/// The right object symbol name that we're selecting a left symbol for
pub selecting_left: Option<String>,
/// The left object symbol name that we're selecting a right symbol for
pub selecting_right: Option<String>,
}
fn symbol_ref_by_name(obj: &ObjInfo, name: &str) -> Option<SymbolRef> {
for (section_idx, section) in obj.sections.iter().enumerate() {
for (symbol_idx, symbol) in section.symbols.iter().enumerate() {
if symbol.name == name {
return Some(SymbolRef { section_idx, symbol_idx });
}
}
}
None
}
fn apply_symbol_mappings(
left: &ObjInfo,
right: &ObjInfo,
mapping_config: &MappingConfig,
left_used: &mut HashSet<SymbolRef>,
right_used: &mut HashSet<SymbolRef>,
matches: &mut Vec<SymbolMatch>,
) -> Result<()> {
// If we're selecting a symbol to use as a comparison, mark it as used
// This ensures that we don't match it to another symbol at any point
if let Some(left_name) = &mapping_config.selecting_left {
if let Some(left_symbol) = symbol_ref_by_name(left, left_name) {
left_used.insert(left_symbol);
}
}
if let Some(right_name) = &mapping_config.selecting_right {
if let Some(right_symbol) = symbol_ref_by_name(right, right_name) {
right_used.insert(right_symbol);
}
}
// Apply manual symbol mappings
for (left_name, right_name) in &mapping_config.mappings {
let Some(left_symbol) = symbol_ref_by_name(left, left_name) else {
continue;
};
if left_used.contains(&left_symbol) {
continue;
}
let Some(right_symbol) = symbol_ref_by_name(right, right_name) else {
continue;
};
if right_used.contains(&right_symbol) {
continue;
}
let left_section = &left.sections[left_symbol.section_idx];
let right_section = &right.sections[right_symbol.section_idx];
if left_section.kind != right_section.kind {
log::warn!(
"Symbol section kind mismatch: {} ({:?}) vs {} ({:?})",
left_name,
left_section.kind,
right_name,
right_section.kind
);
continue;
}
matches.push(SymbolMatch {
left: Some(left_symbol),
right: Some(right_symbol),
prev: None, // TODO
section_kind: left_section.kind,
});
left_used.insert(left_symbol);
right_used.insert(right_symbol);
}
Ok(())
}
/// Find matching symbols between each object.
fn matching_symbols(
left: Option<&ObjInfo>,
right: Option<&ObjInfo>,
prev: Option<&ObjInfo>,
mappings: &MappingConfig,
) -> Result<Vec<SymbolMatch>> {
let mut matches = Vec::new();
let mut left_used = HashSet::new();
let mut right_used = HashSet::new();
if let Some(left) = left {
if let Some(right) = right {
apply_symbol_mappings(
left,
right,
mappings,
&mut left_used,
&mut right_used,
&mut matches,
)?;
}
for (section_idx, section) in left.sections.iter().enumerate() {
for (symbol_idx, symbol) in section.symbols.iter().enumerate() {
let symbol_ref = SymbolRef { section_idx, symbol_idx };
if left_used.contains(&symbol_ref) {
continue;
}
let symbol_match = SymbolMatch {
left: Some(symbol_ref),
right: find_symbol(right, symbol, section, Some(&right_used)),
prev: find_symbol(prev, symbol, section, None),
section_kind: section.kind,
};
matches.push(symbol_match);
if let Some(right) = symbol_match.right {
right_used.insert(right);
}
}
}
for (symbol_idx, symbol) in left.common.iter().enumerate() {
let symbol_ref = SymbolRef { section_idx: SECTION_COMMON, symbol_idx };
if left_used.contains(&symbol_ref) {
continue;
}
let symbol_match = SymbolMatch {
left: Some(symbol_ref),
right: find_common_symbol(right, symbol),
prev: find_common_symbol(prev, symbol),
section_kind: ObjSectionKind::Bss,
};
matches.push(symbol_match);
if let Some(right) = symbol_match.right {
right_used.insert(right);
}
}
}
if let Some(right) = right {
for (section_idx, section) in right.sections.iter().enumerate() {
for (symbol_idx, symbol) in section.symbols.iter().enumerate() {
let symbol_ref = SymbolRef { section_idx, symbol_idx };
if right_used.contains(&symbol_ref) {
continue;
}
matches.push(SymbolMatch {
left: None,
right: Some(symbol_ref),
prev: find_symbol(prev, symbol, section, None),
section_kind: section.kind,
});
}
}
for (symbol_idx, symbol) in right.common.iter().enumerate() {
let symbol_ref = SymbolRef { section_idx: SECTION_COMMON, symbol_idx };
if right_used.contains(&symbol_ref) {
continue;
}
matches.push(SymbolMatch {
left: None,
right: Some(symbol_ref),
prev: find_common_symbol(prev, symbol),
section_kind: ObjSectionKind::Bss,
});
}
}
Ok(matches)
}
fn unmatched_symbols<'section, 'used>(
section: &'section ObjSection,
section_idx: usize,
used: Option<&'used HashSet<SymbolRef>>,
) -> impl Iterator<Item = (usize, &'section ObjSymbol)> + 'used
where
'section: 'used,
{
section.symbols.iter().enumerate().filter(move |&(symbol_idx, _)| {
// Skip symbols that have already been matched
!used.map(|u| u.contains(&SymbolRef { section_idx, symbol_idx })).unwrap_or(false)
})
}
fn find_symbol(
obj: Option<&ObjInfo>,
in_symbol: &ObjSymbol,
in_section: &ObjSection,
used: Option<&HashSet<SymbolRef>>,
) -> Option<SymbolRef> {
let obj = obj?;
// Try to find an exact name match
for (section_idx, section) in obj.sections.iter().enumerate() {
if section.kind != in_section.kind {
continue;
}
if let Some((symbol_idx, _)) = unmatched_symbols(section, section_idx, used)
.find(|(_, symbol)| symbol.name == in_symbol.name)
{
return Some(SymbolRef { section_idx, symbol_idx });
}
}
// Match compiler-generated symbols against each other (e.g. @251 -> @60)
// If they are at the same address in the same section
if in_symbol.name.starts_with('@')
&& matches!(in_section.kind, ObjSectionKind::Data | ObjSectionKind::Bss)
{
if let Some((section_idx, section)) =
obj.sections.iter().enumerate().find(|(_, s)| s.name == in_section.name)
{
if let Some((symbol_idx, _)) =
unmatched_symbols(section, section_idx, used).find(|(_, symbol)| {
symbol.address == in_symbol.address && symbol.name.starts_with('@')
})
{
return Some(SymbolRef { section_idx, symbol_idx });
}
}
}
// Match Metrowerks symbol$1234 against symbol$2345
if let Some((prefix, suffix)) = in_symbol.name.split_once('$') {
if !suffix.chars().all(char::is_numeric) {
return None;
}
for (section_idx, section) in obj.sections.iter().enumerate() {
if section.kind != in_section.kind {
continue;
}
if let Some((symbol_idx, _)) =
unmatched_symbols(section, section_idx, used).find(|&(_, symbol)| {
if let Some((p, s)) = symbol.name.split_once('$') {
prefix == p && s.chars().all(char::is_numeric)
} else {
false
}
})
{
return Some(SymbolRef { section_idx, symbol_idx });
}
}
}
None
}
fn find_common_symbol(obj: Option<&ObjInfo>, in_symbol: &ObjSymbol) -> Option<SymbolRef> {
let obj = obj?;
for (symbol_idx, symbol) in obj.common.iter().enumerate() {
if symbol.name == in_symbol.name {
return Some(SymbolRef { section_idx: SECTION_COMMON, symbol_idx });
}
}
None
}
/// Find matching sections between each object.
fn matching_sections(left: Option<&ObjInfo>, right: Option<&ObjInfo>) -> Result<Vec<SectionMatch>> {
let mut matches = Vec::new();
if let Some(left) = left {
for (section_idx, section) in left.sections.iter().enumerate() {
matches.push(SectionMatch {
left: Some(section_idx),
right: find_section(right, §ion.name, section.kind),
section_kind: section.kind,
});
}
}
if let Some(right) = right {
for (section_idx, section) in right.sections.iter().enumerate() {
if matches.iter().any(|m| m.right == Some(section_idx)) {
continue;
}
matches.push(SectionMatch {
left: None,
right: Some(section_idx),
section_kind: section.kind,
});
}
}
Ok(matches)
}
fn find_section(obj: Option<&ObjInfo>, name: &str, section_kind: ObjSectionKind) -> Option<usize> {
for (section_idx, section) in obj?.sections.iter().enumerate() {
if section.kind != section_kind {
continue;
}
if section.name == name {
return Some(section_idx);
}
}
None
}