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[AIX] Fix XCOFF metadata #118905

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Merged
merged 3 commits into from
Dec 18, 2023
Merged

[AIX] Fix XCOFF metadata #118905

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14e6f3f
Fix XCOFF metadata
Dec 13, 2023
ce9a02e
Address comment
Dec 14, 2023
a8e1da3
Address comment
bzEq Dec 18, 2023
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Kai Luo committed Dec 14, 2023
commit ce9a02eaac80ad5f4843dd93228e72f04ec1cb4c
7 changes: 5 additions & 2 deletions compiler/rustc_codegen_ssa/src/back/metadata.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -159,7 +159,7 @@ pub(super) fn get_metadata_xcoff<'a>(path: &Path, data: &'a [u8]) -> Result<&'a
{
let offset = metadata_symbol.address() as usize;
// The offset specifies the location of rustc metadata in the .info section of XCOFF.
// Each string stored in .info section of XCOFF is preceded by a 4-byte lenght field.
// Each string stored in .info section of XCOFF is preceded by a 4-byte length field.
if offset < 4 {
return Err(format!("Invalid metadata symbol offset: {offset}"));
}
Expand Down Expand Up @@ -480,7 +480,10 @@ pub fn create_wrapper_file(
file.section_mut(section).flags =
SectionFlags::Xcoff { s_flags: xcoff::STYP_INFO as u32 };
// Encode string stored in .info section of XCOFF.
let len = data.len() as u32;
// FIXME: The length of data here is not guaranteed to fit in a u32.
// We may have to split the data into multiple pieces in order to
// store in .info section.
let len: u32 = data.len().try_into().unwrap();
let offset = file.append_section_data(section, &len.to_be_bytes(), 1);
// Add a symbol referring to the data in .info section.
file.add_symbol(Symbol {
Expand Down