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[PULL,05/10] target-arm: A64: Handle blr lr

Message ID 1398956107-7411-6-git-send-email-peter.maydell@linaro.org
State New
Headers show

Commit Message

Peter Maydell May 1, 2014, 2:55 p.m. UTC 
From: "Edgar E. Iglesias" <edgar.iglesias@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.iglesias@xilinx.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Cc: qemu-stable@nongnu.org
Message-id: 1398926097-28097-3-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target-arm/translate-a64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
index e31e069..b62db4d 100644
--- a/target-arm/translate-a64.c
+++ b/target-arm/translate-a64.c
@@ -1509,8 +1509,10 @@  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 */
@@ -1529,7 +1531,6 @@  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;
 }