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dwarf

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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
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13
src/dwarf/divination.rs
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@ -37,7 +37,6 @@ pub struct DwarfInfo {
/// The `.eh_frame_hdr` section.
/// 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>.
#[repr(C)]
struct EhFrameHeader {
version: u8,
eh_frame_ptr_enc: EhHeaderEncoded,
@ -51,7 +50,7 @@ impl EhFrameHeader {
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 {
return None;
};
@ -61,7 +60,11 @@ impl EhFrameHeader {
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> {
@ -150,14 +153,14 @@ pub fn dwarf_info(addr: *const ffi::c_void) -> Option<DwarfInfo> {
}
let header = &*out.dlfo_eh_frame.cast::<EhFrameHeader>();
if header.version != 1 {
trace!("eh_frame_hdr version is not 1");
return None;
}
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");
return None;
};