68 lines
2.3 KiB
Rust
68 lines
2.3 KiB
Rust
//! A simple example of parsing `.debug_info`.
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use object::{Object, ObjectSection};
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use std::{borrow, env, fs};
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fn main() {
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for path in env::args().skip(1) {
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let file = fs::File::open(&path).unwrap();
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let mmap = unsafe { memmap::Mmap::map(&file).unwrap() };
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let object = object::File::parse(&*mmap).unwrap();
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let endian = if object.is_little_endian() {
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gimli::RunTimeEndian::Little
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} else {
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gimli::RunTimeEndian::Big
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};
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dump_file(&object, endian).unwrap();
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}
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}
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fn dump_file(object: &object::File, endian: gimli::RunTimeEndian) -> Result<(), gimli::Error> {
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// Load a section and return as `Cow<[u8]>`.
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let load_section = |id: gimli::SectionId| -> Result<borrow::Cow<[u8]>, gimli::Error> {
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match object.section_by_name(id.name()) {
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Some(ref section) => Ok(section
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.uncompressed_data()
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.unwrap_or(borrow::Cow::Borrowed(&[][..]))),
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None => Ok(borrow::Cow::Borrowed(&[][..])),
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}
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};
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// Load all of the sections.
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let dwarf_cow = gimli::Dwarf::load(&load_section)?;
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// Borrow a `Cow<[u8]>` to create an `EndianSlice`.
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let borrow_section: &dyn for<'a> Fn(
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&'a borrow::Cow<[u8]>,
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) -> gimli::EndianSlice<'a, gimli::RunTimeEndian> =
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&|section| gimli::EndianSlice::new(&*section, endian);
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// Create `EndianSlice`s for all of the sections.
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let dwarf = dwarf_cow.borrow(&borrow_section);
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// Iterate over the compilation units.
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let mut iter = dwarf.units();
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while let Some(header) = iter.next()? {
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println!(
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"Unit at <.debug_info+0x{:x}>",
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header.offset().as_debug_info_offset().unwrap().0
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);
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let unit = dwarf.unit(header)?;
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// Iterate over the Debugging Information Entries (DIEs) in the unit.
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let mut depth = 0;
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let mut entries = unit.entries();
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while let Some((delta_depth, entry)) = entries.next_dfs()? {
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depth += delta_depth;
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println!("<{}><{:x}> {}", depth, entry.offset().0, entry.tag());
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// Iterate over the attributes in the DIE.
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let mut attrs = entry.attrs();
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while let Some(attr) = attrs.next()? {
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println!(" {}: {:?}", attr.name(), attr.value());
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}
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}
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}
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Ok(())
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}
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