On 7/8/21 5:05 AM, Peter Maydell wrote:
On Wed, 30 Jun 2021 at 19:47, Richard Henderson
<richard.hender...@linaro.org> wrote:

Using gen_goto_tb directly misses the single-step check.

Cc: qemu-...@nongnu.org
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
  target/arm/translate.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/target/arm/translate.c b/target/arm/translate.c
index a0c6cfa902..8cd31feeaa 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -8582,7 +8582,7 @@ static bool trans_ISB(DisasContext *s, arg_ISB *a)
       * self-modifying code correctly and also to take
       * any pending interrupts immediately.
       */
-    gen_goto_tb(s, 0, s->base.pc_next);
+    gen_jmp(s, s->base.pc_next);
      return true;
  }

@@ -8596,7 +8596,7 @@ static bool trans_SB(DisasContext *s, arg_SB *a)
       * for TCG; MB and end the TB instead.
       */
      tcg_gen_mb(TCG_MO_ALL | TCG_BAR_SC);
-    gen_goto_tb(s, 0, s->base.pc_next);
+    gen_jmp(s, s->base.pc_next);
      return true;

Why isn't it enough here just to set is_jmp to DISAS_NEXT ?

You mean DISAS_TOO_MANY?  That would work, yes.
At the time I was just thinking of replacing one jump with another.


r~


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