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Rollup merge of #132259 - mrkajetanp:branch-protection-pauth-lr, r=davidtwco

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rustc_codegen_llvm: Add a new 'pc' option to branch-protection

Add a new 'pc' option to -Z branch-protection for aarch64 that enables the use of PC as a diversifier in PAC branch protection code.

When the pauth-lr target feature is enabled in combination with -Z branch-protection=pac-ret,pc, the new 9.5-a instructions (pacibsppc, retaasppc, etc) will be generated.
This commit is contained in:
Matthias Krüger 2024-11-05 20:10:49 +01:00 • committed by GitHub
commit c8247c0a19
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12 changed files with 97 additions and 17 deletions
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compiler/rustc_session/src/config.rs
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@ -1320,6 +1320,7 @@ pub enum PAuthKey {
#[derive(Clone, Copy, Hash, Debug, PartialEq)]
pub struct PacRet {
pub leaf: bool,
pub pc: bool,
pub key: PAuthKey,
}