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target/m68k: don't word align SP in stack frame if M68K_FEATURE_UNALIGNED_DATA feature enabled 

Commit a9431a03f7 ("target/m68k: add M68K_FEATURE_UNALIGNED_DATA feature") added
a new feature for processors from the 68020 onwards which do not require data
accesses to be word aligned.

Unfortunately the original commit missed an additional case whereby the SP is
still word aligned when setting up an additional format 1 stack frame so add the
necessary M68K_FEATURE_UNALIGNED_DATA feature guard.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Fixes: a9431a03f7 ("target/m68k: add M68K_FEATURE_UNALIGNED_DATA feature")
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220108180453.18680-1-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Mark Cave-Ayland 2022-01-08 18:04:53 +00:00 committed by Laurent Vivier
parent 4e136629f0
commit 31144eb639
1 changed files with 4 additions and 1 deletions
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5
target/m68k/op_helper.c
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@ -415,7 +415,10 @@ static void m68k_interrupt_all(CPUM68KState *env, int is_hw)
oldsr = sr;
env->aregs[7] = sp;
cpu_m68k_set_sr(env, sr &= ~SR_M);
sp = env->aregs[7] & ~1;
sp = env->aregs[7];
if (!m68k_feature(env, M68K_FEATURE_UNALIGNED_DATA)) {
sp &= ~1;
}
do_stack_frame(env, &sp, 1, oldsr, 0, retaddr);
} else {
do_stack_frame(env, &sp, 0, oldsr, 0, retaddr);