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target/s390x: Skip wout, cout helpers if op helper does not return

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When op raises an exception, it may not have initialized the output
temps that would be written back by wout or cout.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2018-08-20 19:56:24 -07:00
parent 0c9fa16805
commit 72d8ad67ba
1 changed files with 15 additions and 5 deletions
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20
target/s390x/translate.c
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@ -1128,11 +1128,19 @@ struct DisasInsn {
const char *name;
/* Pre-process arguments before HELP_OP. */
void (*help_in1)(DisasContext *, DisasFields *, DisasOps *);
void (*help_in2)(DisasContext *, DisasFields *, DisasOps *);
void (*help_prep)(DisasContext *, DisasFields *, DisasOps *);
/*
* Post-process output after HELP_OP.
* Note that these are not called if HELP_OP returns DISAS_NORETURN.
*/
void (*help_wout)(DisasContext *, DisasFields *, DisasOps *);
void (*help_cout)(DisasContext *, DisasOps *);
/* Implement the operation itself. */
DisasJumpType (*help_op)(DisasContext *, DisasOps *);
uint64_t data;
@ -6125,11 +6133,13 @@ static DisasJumpType translate_one(CPUS390XState *env, DisasContext *s)
if (insn->help_op) {
ret = insn->help_op(s, &o);
}
if (insn->help_wout) {
insn->help_wout(s, &f, &o);
}
if (insn->help_cout) {
insn->help_cout(s, &o);
if (ret != DISAS_NORETURN) {
if (insn->help_wout) {
insn->help_wout(s, &f, &o);
}
if (insn->help_cout) {
insn->help_cout(s, &o);
}
}
/* Free any temporaries created by the helpers. */