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objdump.rs
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objdump.rs
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use object::read::archive::ArchiveFile;
use object::read::macho::{DyldCache, FatArch, FatHeader};
use object::{Endianness, Object, ObjectComdat, ObjectSection, ObjectSymbol};
use std::io::{Result, Write};
pub fn print<W: Write, E: Write>(
w: &mut W,
e: &mut E,
file: &[u8],
extra_files: &[&[u8]],
member_names: Vec<String>,
) -> Result<()> {
let mut member_names: Vec<_> = member_names.into_iter().map(|name| (name, false)).collect();
if let Ok(archive) = ArchiveFile::parse(file) {
writeln!(w, "Format: Archive (kind: {:?})", archive.kind())?;
for member in archive.members() {
match member {
Ok(member) => {
if find_member(&mut member_names, member.name()) {
writeln!(w)?;
writeln!(w, "{}:", String::from_utf8_lossy(member.name()))?;
if let Ok(data) = member.data(file) {
dump_object(w, e, data)?;
}
}
}
Err(err) => writeln!(e, "Failed to parse archive member: {}", err)?,
}
}
} else if let Ok(arches) = FatHeader::parse_arch32(file) {
writeln!(w, "Format: Mach-O Fat 32")?;
for arch in arches {
writeln!(w)?;
writeln!(w, "Fat Arch: {:?}", arch.architecture())?;
match arch.data(file) {
Ok(data) => dump_object(w, e, data)?,
Err(err) => writeln!(e, "Failed to parse Fat 32 data: {}", err)?,
}
}
} else if let Ok(arches) = FatHeader::parse_arch64(file) {
writeln!(w, "Format: Mach-O Fat 64")?;
for arch in arches {
writeln!(w)?;
writeln!(w, "Fat Arch: {:?}", arch.architecture())?;
match arch.data(file) {
Ok(data) => dump_object(w, e, data)?,
Err(err) => writeln!(e, "Failed to parse Fat 64 data: {}", err)?,
}
}
} else if let Ok(cache) = DyldCache::<Endianness>::parse(file, extra_files) {
writeln!(w, "Format: dyld cache {:?}-endian", cache.endianness())?;
writeln!(w, "Architecture: {:?}", cache.architecture())?;
for image in cache.images() {
let path = match image.path() {
Ok(path) => path,
Err(err) => {
writeln!(e, "Failed to parse dydld image name: {}", err)?;
continue;
}
};
if !find_member(&mut member_names, path.as_bytes()) {
continue;
}
writeln!(w)?;
writeln!(w, "{}:", path)?;
let file = match image.parse_object() {
Ok(file) => file,
Err(err) => {
writeln!(e, "Failed to parse file: {}", err)?;
continue;
}
};
dump_parsed_object(w, e, &file)?;
}
} else {
dump_object(w, e, file)?;
}
for (name, found) in member_names {
if !found {
writeln!(e, "Failed to find member '{}", name)?;
}
}
Ok(())
}
fn find_member(member_names: &mut [(String, bool)], name: &[u8]) -> bool {
if member_names.is_empty() {
return true;
}
match member_names.iter().position(|x| x.0.as_bytes() == name) {
Some(i) => {
member_names[i].1 = true;
true
}
None => false,
}
}
fn dump_object<W: Write, E: Write>(w: &mut W, e: &mut E, data: &[u8]) -> Result<()> {
match object::File::parse(data) {
Ok(file) => {
dump_parsed_object(w, e, &file)?;
}
Err(err) => {
writeln!(e, "Failed to parse file: {}", err)?;
}
}
Ok(())
}
fn dump_parsed_object<W: Write, E: Write>(w: &mut W, e: &mut E, file: &object::File) -> Result<()> {
writeln!(
w,
"Format: {:?} {:?}-endian {}-bit",
file.format(),
file.endianness(),
if file.is_64() { "64" } else { "32" }
)?;
writeln!(w, "Kind: {:?}", file.kind())?;
writeln!(w, "Architecture: {:?}", file.architecture())?;
writeln!(w, "Flags: {:x?}", file.flags())?;
writeln!(
w,
"Relative Address Base: {:x?}",
file.relative_address_base()
)?;
writeln!(w, "Entry Address: {:x?}", file.entry())?;
match file.mach_uuid() {
Ok(Some(uuid)) => writeln!(w, "Mach UUID: {:x?}", uuid)?,
Ok(None) => {}
Err(err) => writeln!(e, "Failed to parse Mach UUID: {}", err)?,
}
match file.build_id() {
Ok(Some(build_id)) => writeln!(w, "Build ID: {:x?}", build_id)?,
Ok(None) => {}
Err(err) => writeln!(e, "Failed to parse build ID: {}", err)?,
}
match file.gnu_debuglink() {
Ok(Some((filename, crc))) => writeln!(
w,
"GNU debug link: {} CRC: {:08x}",
String::from_utf8_lossy(filename),
crc,
)?,
Ok(None) => {}
Err(err) => writeln!(e, "Failed to parse GNU debug link: {}", err)?,
}
match file.gnu_debugaltlink() {
Ok(Some((filename, build_id))) => writeln!(
w,
"GNU debug alt link: {}, build ID: {:x?}",
String::from_utf8_lossy(filename),
build_id,
)?,
Ok(None) => {}
Err(err) => writeln!(e, "Failed to parse GNU debug alt link: {}", err)?,
}
match file.pdb_info() {
Ok(Some(info)) => writeln!(
w,
"PDB file: {}, GUID: {:x?}, Age: {}",
String::from_utf8_lossy(info.path()),
info.guid(),
info.age()
)?,
Ok(None) => {}
Err(err) => writeln!(e, "Failed to parse PE CodeView info: {}", err)?,
}
for segment in file.segments() {
writeln!(w, "{:x?}", segment)?;
}
for section in file.sections() {
writeln!(w, "{}: {:x?}", section.index().0, section)?;
}
for comdat in file.comdats() {
write!(w, "{:?} Sections:", comdat)?;
for section in comdat.sections() {
write!(w, " {}", section.0)?;
}
writeln!(w)?;
}
writeln!(w)?;
writeln!(w, "Symbols")?;
for symbol in file.symbols() {
writeln!(w, "{}: {:x?}", symbol.index().0, symbol)?;
}
for section in file.sections() {
if section.relocations().next().is_some() {
writeln!(
w,
"\n{} relocations",
section.name().unwrap_or("<invalid name>")
)?;
for relocation in section.relocations() {
writeln!(w, "{:x?}", relocation)?;
}
}
}
writeln!(w)?;
writeln!(w, "Dynamic symbols")?;
for symbol in file.dynamic_symbols() {
writeln!(w, "{}: {:x?}", symbol.index().0, symbol)?;
}
if let Some(relocations) = file.dynamic_relocations() {
writeln!(w)?;
writeln!(w, "Dynamic relocations")?;
for relocation in relocations {
writeln!(w, "{:x?}", relocation)?;
}
}
match file.imports() {
Ok(imports) => {
if !imports.is_empty() {
writeln!(w)?;
for import in imports {
writeln!(w, "{:x?}", import)?;
}
}
}
Err(err) => writeln!(e, "Failed to parse imports: {}", err)?,
}
match file.exports() {
Ok(exports) => {
if !exports.is_empty() {
writeln!(w)?;
for export in exports {
writeln!(w, "{:x?}", export)?;
}
}
}
Err(err) => writeln!(e, "Failed to parse exports: {}", err)?,
}
Ok(())
}