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// Copyright 2021-2026 Vector 35 Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use gimli::{EndianRcSlice, Endianity, RunTimeEndian, SectionId};
use object::{Object, ObjectSection};
use binaryninja::{
binary_view::{BinaryView, BinaryViewBase},
settings::Settings,
Endianness,
};
use binaryninja::settings::QueryOptions;
use std::rc::Rc;
//////////////////////
// Dwarf Validation
#[derive(thiserror::Error, Debug)]
pub enum Error {
#[error("unknown section compression method {0:#x}")]
UnknownCompressionMethod(u32),
#[error("{0}")]
GimliError(#[from] gimli::Error),
#[error("{0}")]
IoError(#[from] std::io::Error),
#[error("{0}")]
ObjectError(#[from] object::Error),
}
pub fn is_non_dwo_dwarf(view: &BinaryView) -> bool {
view.section_by_name(".debug_info").is_some() || view.section_by_name("__debug_info").is_some()
}
pub fn is_dwo_dwarf(view: &BinaryView) -> bool {
view.section_by_name(".debug_info.dwo").is_some()
}
pub fn is_raw_non_dwo_dwarf(view: &BinaryView) -> bool {
if let Some(raw_view) = view.raw_view() {
raw_view.section_by_name(".debug_info").is_some()
|| view.section_by_name("__debug_info").is_some()
} else {
false
}
}
pub fn is_raw_dwo_dwarf(view: &BinaryView) -> bool {
if let Some(raw_view) = view.raw_view() {
raw_view.section_by_name(".debug_info.dwo").is_some()
} else {
false
}
}
pub fn can_use_debuginfod(view: &BinaryView) -> bool {
let mut query_options = QueryOptions::new_with_view(view);
has_build_id_section(view)
&& Settings::new().get_bool_with_opts("network.enableDebuginfod", &mut query_options)
}
pub fn has_build_id_section(view: &BinaryView) -> bool {
if let Some(raw_view) = view.raw_view() {
return raw_view.section_by_name(".note.gnu.build-id").is_some();
}
false
}
pub fn is_valid(view: &BinaryView) -> bool {
is_non_dwo_dwarf(view)
|| is_raw_non_dwo_dwarf(view)
|| is_dwo_dwarf(view)
|| is_raw_dwo_dwarf(view)
}
pub fn get_endian(view: &BinaryView) -> RunTimeEndian {
match view.default_endianness() {
Endianness::LittleEndian => RunTimeEndian::Little,
Endianness::BigEndian => RunTimeEndian::Big,
}
}
pub fn create_section_reader<Endian: Endianity>(
section_id: SectionId,
view: &BinaryView,
endian: Endian,
is_dwo: bool,
) -> Result<RelocateOwned<gimli::EndianRcSlice<Endian>>, Error> {
let raw_view = view.raw_view().unwrap();
let view_data = raw_view.read_vec(0, raw_view.len() as usize);
let file = object::File::parse(&*view_data)?;
create_section_reader_object(section_id, &file, endian, is_dwo)
}
#[derive(Debug, Clone)]
pub struct RelocationMap(Rc<object::read::RelocationMap>);
impl Default for RelocationMap {
fn default() -> Self {
Self(Rc::new(object::read::RelocationMap::default()))
}
}
impl RelocationMap {
fn add(&mut self, file: &object::File, section: &object::Section) -> Result<(), Error> {
let map =
Rc::get_mut(&mut self.0).expect("Failed to get mutable reference to RelocationMap");
for (offset, relocation) in section.relocations() {
map.add(file, offset, relocation)?
}
Ok(())
}
}
impl gimli::read::Relocate for RelocationMap {
fn relocate_address(&self, offset: usize, value: u64) -> gimli::Result<u64> {
Ok(self.0.relocate(offset as u64, value))
}
fn relocate_offset(&self, offset: usize, value: usize) -> gimli::Result<usize> {
<usize as gimli::ReaderOffset>::from_u64(self.0.relocate(offset as u64, value as u64))
}
}
type RelocateOwned<R> = gimli::RelocateReader<R, RelocationMap>;
pub fn create_section_reader_object<Endian: gimli::Endianity>(
id: gimli::SectionId,
file: &object::File,
endian: Endian,
is_dwo: bool,
) -> Result<RelocateOwned<gimli::EndianRcSlice<Endian>>, Error> {
let mut relocations = RelocationMap::default();
let name = if is_dwo {
id.dwo_name()
} else if file.format() == object::BinaryFormat::Xcoff {
id.xcoff_name()
} else {
Some(id.name())
};
let data = match name.and_then(|name| file.section_by_name(name)) {
Some(ref section) => {
// DWO sections never have relocations, so don't bother.
if !is_dwo {
relocations.add(file, section)?;
}
section.uncompressed_data()?.into_owned()
}
// Use a non-zero capacity so that `ReaderOffsetId`s are unique.
None => Vec::with_capacity(1),
};
let section = EndianRcSlice::new(Rc::from(data.into_boxed_slice()), endian);
Ok(gimli::RelocateReader::new(section, relocations))
}
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