From 913f0836f69f67ffb5678fa148b9df85d3f46539 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 17 Oct 2022 08:23:03 +1000 Subject: [PATCH] target/i386: Save and restore pc_save before tcg_remove_ops_after Restore pc_save while undoing any state change that may have happened while decoding the instruction. Leave a TODO about removing all of that when the table-based decoder is complete. Cc: Paolo Bonzini Suggested-by: Peter Maydell Signed-off-by: Richard Henderson Message-Id: <20221016222303.288551-1-richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini --- target/i386/tcg/translate.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 279a3ae999..75ca99084e 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -4817,6 +4817,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) int modrm, reg, rm, mod, op, opreg, val; bool orig_cc_op_dirty = s->cc_op_dirty; CCOp orig_cc_op = s->cc_op; + target_ulong orig_pc_save = s->pc_save; s->pc = s->base.pc_next; s->override = -1; @@ -4838,8 +4839,15 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) case 2: /* Restore state that may affect the next instruction. */ s->pc = s->base.pc_next; + /* + * TODO: These save/restore can be removed after the table-based + * decoder is complete; we will be decoding the insn completely + * before any code generation that might affect these variables. + */ s->cc_op_dirty = orig_cc_op_dirty; s->cc_op = orig_cc_op; + s->pc_save = orig_pc_save; + /* END TODO */ s->base.num_insns--; tcg_remove_ops_after(s->prev_insn_end); s->base.is_jmp = DISAS_TOO_MANY;