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libdwarf: make catch type field singly referenced #192

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sb10q merged 1 commits from occheung/artiq-zynq:target2-rel into master 2022-05-31 18:26:30 +08:00
Conversation 0 Commits 1 Files Changed 1 +11 -8
1 changed files with 11 additions and 8 deletions
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17
src/libdwarf/src/eh.rs
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@ -72,7 +72,7 @@ unsafe fn get_ttype_entry(
encoding: u8,
ttype_base: usize,
ttype: *const u8,
) -> Result<*const u8, ()> {
) -> Result<Option<*const u8>, ()> {
let i = (offset * size_of_encoded_value(encoding)) as isize;
read_encoded_pointer_with_base(
&mut DwarfReader::new(ttype.offset(-i)),
@ -83,7 +83,10 @@ unsafe fn get_ttype_entry(
encoding | DW_EH_PE_pcrel,
ttype_base,
)
.map(|v| v as *const u8)
.map(|v| match v {
ttype_base => None,
ttype_entry => Some(ttype_entry as *const u8),
})
}
pub unsafe fn find_eh_action(
@ -163,12 +166,12 @@ pub unsafe fn find_eh_action(
ttype_base,
ttype_table,
)?;
let clause_ptr = *(catch_type as *const *const u32);
if clause_ptr.is_null() {
return Ok(EHAction::Catch(lpad));
match catch_type {
Some(clause_ptr) if *(clause_ptr as *const u32) == id => {
return Ok(EHAction::Catch(lpad))
}
if *clause_ptr == id {
return Ok(EHAction::Catch(lpad));
None => return Ok(EHAction::Catch(lpad)),
_ => {}
}
} else if ar_filter < 0 {
// FIXME: how to handle this?