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| author | Richard Henderson <richard.henderson@linaro.org> | 2024-08-13 10:04:00 +1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2024-10-08 06:40:31 -0700 |
| commit | 352cc9f300d83ea48b8154bfd2ff985fece887d0 (patch) | |
| tree | d1e160b155b286da3fa89681d4ac96b8742a9e95 | |
| parent | 3213da7b9539581c6df95f8ced5b09d0b02d425f (diff) | |
| download | qemu-352cc9f300d83ea48b8154bfd2ff985fece887d0.zip qemu-352cc9f300d83ea48b8154bfd2ff985fece887d0.tar.gz qemu-352cc9f300d83ea48b8154bfd2ff985fece887d0.tar.bz2 | |
target/m68k: Always return a temporary from gen_lea_mode
Returning a raw areg does not preserve the value if the areg
is subsequently modified. Fixes, e.g. "jsr (sp)", where the
return address is pushed before the branch.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2483
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240813000737.228470-1-richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
| -rw-r--r-- | target/m68k/translate.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/target/m68k/translate.c b/target/m68k/translate.c index 445966f..ad3ce34 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -720,7 +720,9 @@ static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s, } /* fallthru */ case 2: /* Indirect register */ - return get_areg(s, reg0); + tmp = tcg_temp_new(); + tcg_gen_mov_i32(tmp, get_areg(s, reg0)); + return tmp; case 4: /* Indirect predecrememnt. */ if (opsize == OS_UNSIZED) { return NULL_QREG; @@ -747,20 +749,23 @@ static TCGv gen_lea_mode(CPUM68KState *env, DisasContext *s, switch (reg0) { case 0: /* Absolute short. */ offset = (int16_t)read_im16(env, s); - return tcg_constant_i32(offset); + break; case 1: /* Absolute long. */ offset = read_im32(env, s); - return tcg_constant_i32(offset); + break; case 2: /* pc displacement */ offset = s->pc; offset += (int16_t)read_im16(env, s); - return tcg_constant_i32(offset); + break; case 3: /* pc index+displacement. */ return gen_lea_indexed(env, s, NULL_QREG); case 4: /* Immediate. */ default: return NULL_QREG; } + tmp = tcg_temp_new(); + tcg_gen_movi_i32(tmp, offset); + return tmp; } /* Should never happen. */ return NULL_QREG; |