From: Richard Henderson <richard.henderson@linaro.org>
Date: Wed, 8 Oct 2025 21:55:57 +0000 (-0700)
Subject: target/arm: Add gcs record for BLR with PAuth
X-Git-Tag: v10.2.0-rc1~67^2~19
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d28bb06dc8ad5667c26d00765c442ca9cf7f1aa1;p=thirdparty%2Fqemu.git

target/arm: Add gcs record for BLR with PAuth

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20251008215613.300150-58-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index fcfa4223f5..9c3de0cf71 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -1842,21 +1842,21 @@ static bool trans_BRAZ(DisasContext *s, arg_braz *a)
 
 static bool trans_BLRAZ(DisasContext *s, arg_braz *a)
 {
-    TCGv_i64 dst, lr;
+    TCGv_i64 dst, link;
 
     if (!dc_isar_feature(aa64_pauth, s)) {
         return false;
     }
-
     dst = auth_branch_target(s, cpu_reg(s, a->rn), tcg_constant_i64(0), !a->m);
-    lr = cpu_reg(s, 30);
-    if (dst == lr) {
-        TCGv_i64 tmp = tcg_temp_new_i64();
-        tcg_gen_mov_i64(tmp, dst);
-        dst = tmp;
+
+    link = tcg_temp_new_i64();
+    gen_pc_plus_diff(s, link, 4);
+    if (s->gcs_en) {
+        gen_add_gcs_record(s, link);
     }
-    gen_pc_plus_diff(s, lr, curr_insn_len(s));
     gen_a64_set_pc(s, dst);
+    tcg_gen_mov_i64(cpu_reg(s, 30), link);
+
     set_btype_for_blr(s);
     s->base.is_jmp = DISAS_JUMP;
     return true;
@@ -1892,20 +1892,21 @@ static bool trans_BRA(DisasContext *s, arg_bra *a)
 
 static bool trans_BLRA(DisasContext *s, arg_bra *a)
 {
-    TCGv_i64 dst, lr;
+    TCGv_i64 dst, link;
 
     if (!dc_isar_feature(aa64_pauth, s)) {
         return false;
     }
     dst = auth_branch_target(s, cpu_reg(s, a->rn), cpu_reg_sp(s, a->rm), !a->m);
-    lr = cpu_reg(s, 30);
-    if (dst == lr) {
-        TCGv_i64 tmp = tcg_temp_new_i64();
-        tcg_gen_mov_i64(tmp, dst);
-        dst = tmp;
+
+    link = tcg_temp_new_i64();
+    gen_pc_plus_diff(s, link, 4);
+    if (s->gcs_en) {
+        gen_add_gcs_record(s, link);
     }
-    gen_pc_plus_diff(s, lr, curr_insn_len(s));
     gen_a64_set_pc(s, dst);
+    tcg_gen_mov_i64(cpu_reg(s, 30), link);
+
     set_btype_for_blr(s);
     s->base.is_jmp = DISAS_JUMP;
     return true;