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Sparc: fix exceptions in delay slot 

Fix a case where an exception happens with the
instruction in the delay slot.

Recovery of branch condition in the exception handling
code was not converted to TCG. Because the condition
was bogus, wrong NPC could be selected from the two
candidates.

A nice bug report with a test case can be found in:
https://bugs.launchpad.net/qemu/+bug/551814

Fix based on patch by Fabrice Bellard.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2010-04-11 19:47:49 +00:00
parent 73f190352d
commit d7da2a1040
1 changed files with 4 additions and 4 deletions
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8
target-sparc/translate.c
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@ -4932,12 +4932,12 @@ void gen_pc_load(CPUState *env, TranslationBlock *tb,
if (npc == 1) {
/* dynamic NPC: already stored */
} else if (npc == 2) {
target_ulong t2 = (target_ulong)(unsigned long)puc;
/* jump PC: use T2 and the jump targets of the translation */
if (t2)
/* jump PC: use 'cond' and the jump targets of the translation */
if (env->cond) {
env->npc = gen_opc_jump_pc[0];
else
} else {
env->npc = gen_opc_jump_pc[1];
}
} else {
env->npc = npc;
}