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deal with a stack probe symbol on windows

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Folkert 2022-10-29 23:19:45 +02:00
parent b3f151fd53
commit 5a67687bba
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18
crates/linker/src/pe.rs
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@ -387,9 +387,27 @@ pub(crate) fn surgery_pe(executable_path: &Path, metadata_path: &Path, roc_app_b
destination - section_virtual_address as i64 - *offset_in_section as i64
+ relocation.addend();
executable[offset + *offset_in_section as usize..][..4]
.copy_from_slice(&(delta as i32).to_le_bytes());
} else if name == "___chkstk_ms" {
// this is a stack probe that is inserted when a function uses more than 2
// pages of stack space. The source of this function is not linked in, so we
// have to get a bit creative: we just jump to a `ret` instruction, so this
// function call becomes a no-op.
// the last byte of the section should be a `ret` instruction
assert_eq!(slice.last(), Some(0xc3).as_ref());
let delta =
(slice.len() - 1) as i64 - *offset_in_section as i64 + relocation.addend();
executable[offset + *offset_in_section as usize..][..4]
.copy_from_slice(&(delta as i32).to_le_bytes());
} else {
if *address == 0 {
eprintln!("I don't know the address of the {} function!", name);
}
match relocation.kind() {
object::RelocationKind::Relative => {
// we implicitly only do 32-bit relocations