[Qemu-devel] [PATCH 035/108] target-arm: A64: Handle blr lr

[Michael Roth]

From: "Edgar E. Iglesias" <edgar.igles...@xilinx.com>

For linked branches, updates to the link register happen
conceptually after the read of the branch target register.

Signed-off-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Cc: qemu-sta...@nongnu.org
Message-id: 1398926097-28097-3-git-send-email-edgar.igles...@gmail.com
Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
(cherry picked from commit 1b505f93bcf605e7c4144fef83bd039b0d4f2576)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
 target-arm/translate-a64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index a780366..e041f11 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1432,8 +1432,10 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t 
insn)
     switch (opc) {
     case 0: /* BR */
     case 2: /* RET */
+        tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
         break;
     case 1: /* BLR */
+        tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
         tcg_gen_movi_i64(cpu_reg(s, 30), s->pc);
         break;
     case 4: /* ERET */
@@ -1449,7 +1451,6 @@ static void disas_uncond_b_reg(DisasContext *s, uint32_t 
insn)
         return;
     }
 
-    tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn));
     s->is_jmp = DISAS_JUMP;
 }
 
-- 
1.9.1