[v1] target/arm: Implement FEAT_GCS

[PATCH 67/82] target/arm: Load gcs record for RET with PAuth

Posted by Richard Henderson 4 months, 2 weeks ago

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/tcg/translate-a64.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 49e17548c1..23186850f8 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -1890,7 +1890,12 @@ static bool trans_RETA(DisasContext *s, arg_reta *a)
     }
 
     dst = auth_branch_target(s, cpu_reg(s, 30), cpu_X[31], !a->m);
-    gen_a64_set_pc(s, dst);
+    if (s->gcs_en) {
+        GCSInstructionType it = a->m ? GCS_IT_RET_PauthB : GCS_IT_RET_PauthA;
+        gen_load_check_gcs_record(s, dst, it, 30);
+    } else {
+        gen_a64_set_pc(s, dst);
+    }
     s->base.is_jmp = DISAS_JUMP;
     return true;
 }
-- 
2.43.0

Re: [PATCH 67/82] target/arm: Load gcs record for RET with PAuth

Posted by Pierrick Bouvier 4 months, 2 weeks ago

On 7/27/25 1:02 AM, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   target/arm/tcg/translate-a64.c | 7 ++++++-
>   1 file changed, 6 insertions(+), 1 deletion(-)

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>