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authorbors <bors@rust-lang.org>2025-09-24 13:04:19 +0000
committerbors <bors@rust-lang.org>2025-09-24 13:04:19 +0000
commit15283f6fe95e5b604273d13a428bab5fc0788f5a (patch)
tree0dc36ced16f62c9c3445da41a4d9866ff73b3071 /compiler/rustc_session
parente9385f9eea0221ef295a188d49d16f8f5189abf1 (diff)
parent08020def99d2851af0dabde12cc6d203017fa72c (diff)
downloadrust-15283f6fe95e5b604273d13a428bab5fc0788f5a.tar.gz
rust-15283f6fe95e5b604273d13a428bab5fc0788f5a.zip
Auto merge of #146338 - CrooseGit:dev/reucru01/AArch64-enable-GCS, r=Urgau,davidtwco
Extends AArch64 branch protection support to include GCS

Extends existing support for AArch64 branch protection to include support for [Guarded Control Stacks](https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/arm-a-profile-architecture-2022#guarded-control-stack-gcs:~:text=Extraction%20or%20tracking.-,Guarded%20Control%20Stack%20(GCS),-With%20the%202022).
Diffstat (limited to 'compiler/rustc_session')
-rw-r--r--compiler/rustc_session/src/config.rs1
-rw-r--r--compiler/rustc_session/src/options.rs3
2 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 81ada79dd43..ebb6a93b1dd 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -1621,6 +1621,7 @@ pub struct PacRet {
 pub struct BranchProtection {
     pub bti: bool,
     pub pac_ret: Option<PacRet>,
+    pub gcs: bool,
 }
 
 pub(crate) const fn default_lib_output() -> CrateType {
diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 3b9d8117786..b2cc169f12c 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -866,7 +866,7 @@ mod desc {
     pub(crate) const parse_polonius: &str = "either no value or `legacy` (the default), or `next`";
     pub(crate) const parse_stack_protector: &str =
         "one of (`none` (default), `basic`, `strong`, or `all`)";
-    pub(crate) const parse_branch_protection: &str = "a `,` separated combination of `bti`, `pac-ret`, followed by a combination of `pc`, `b-key`, or `leaf`";
+    pub(crate) const parse_branch_protection: &str = "a `,` separated combination of `bti`, `gcs`, `pac-ret`, (optionally with `pc`, `b-key`, `leaf` if `pac-ret` is set)";
     pub(crate) const parse_proc_macro_execution_strategy: &str =
         "one of supported execution strategies (`same-thread`, or `cross-thread`)";
     pub(crate) const parse_remap_path_scope: &str =
@@ -1905,6 +1905,7 @@ pub mod parse {
                             Some(pac) => pac.pc = true,
                             _ => return false,
                         },
+                        "gcs" => slot.gcs = true,
                         _ => return false,
                     };
                 }