Noratrieb/uwuwind
1
0
Fork 0
mirror of https://github.com/Noratrieb/uwuwind.git synced 2026-01-14 16:45:08 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

dwarf

Browse source
This commit is contained in:
nora 2023-06-13 20:49:38 +02:00
parent b5ee24f896
commit 37a2259f6f
1 changed files with 8 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/dwarf/divination.rs
View file

@ -37,7 +37,6 @@ pub struct DwarfInfo {
/// The `.eh_frame_hdr` section. /// The `.eh_frame_hdr` section.
/// See <https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html> /// See <https://refspecs.linuxfoundation.org/LSB_1.3.0/gLSB/gLSB/ehframehdr.html>
/// and <https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html>. /// and <https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html>.
#[repr(C)]
struct EhFrameHeader { struct EhFrameHeader {
version: u8, version: u8,
eh_frame_ptr_enc: EhHeaderEncoded, eh_frame_ptr_enc: EhHeaderEncoded,
@ -51,7 +50,7 @@ impl EhFrameHeader {
addr_of!((*self).encoded_fields).cast::<u8>() addr_of!((*self).encoded_fields).cast::<u8>()
} }
unsafe fn eh_frame(&self, pc: *const ffi::c_void) -> Option<*const u8> { unsafe fn eh_frame(&self) -> Option<*const u8> {
let ValueFormat::DW_EH_PE_sdata4 = self.eh_frame_ptr_enc.format() else { let ValueFormat::DW_EH_PE_sdata4 = self.eh_frame_ptr_enc.format() else {
return None; return None;
}; };
@ -61,7 +60,11 @@ impl EhFrameHeader {
let eh_frame_ptr = unsafe { self.encoded_fields().cast::<i32>().read_unaligned() }; let eh_frame_ptr = unsafe { self.encoded_fields().cast::<i32>().read_unaligned() };
Some(pc.cast::<u8>().offset(eh_frame_ptr as isize)) Some(
self.encoded_fields()
.cast::<u8>()
.offset(eh_frame_ptr as isize),
)
} }
fn fde_count(&self) -> Option<u64> { fn fde_count(&self) -> Option<u64> {
@ -150,14 +153,14 @@ pub fn dwarf_info(addr: *const ffi::c_void) -> Option<DwarfInfo> {
} }
let header = &*out.dlfo_eh_frame.cast::<EhFrameHeader>(); let header = &*out.dlfo_eh_frame.cast::<EhFrameHeader>();
if header.version != 1 { if header.version != 1 {
trace!("eh_frame_hdr version is not 1"); trace!("eh_frame_hdr version is not 1");
return None; return None;
} }
trace!("eh_frame_hdr: {:#?}", header); trace!("eh_frame_hdr: {:#?}", header);
let Some(ptr) = header.eh_frame(addr) else { let Some(ptr) = header.eh_frame() else {
trace!("could not find .eh_frame"); trace!("could not find .eh_frame");
return None; return None;
}; };