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linux-user/s390x: Save/restore fpc when handling a signal

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Linux kernel does this in fpregs_store() and fpregs_load(), so
qemu-user should do this as well.

Found by running valgrind's none/tests/s390x/test_sig.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220817123902.585623-1-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Ilya Leoshkevich 2022-08-17 14:39:02 +02:00 committed by Laurent Vivier
parent 9e59899f8c
commit 2941e0fa05
1 changed files with 2 additions and 0 deletions
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linux-user/s390x/signal.c
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@ -146,6 +146,7 @@ static void save_sigregs(CPUS390XState *env, target_sigregs *sregs)
* We have to store the fp registers to current->thread.fp_regs
* to merge them with the emulated registers.
*/
__put_user(env->fpc, &sregs->fpregs.fpc);
for (i = 0; i < 16; i++) {
__put_user(*get_freg(env, i), &sregs->fpregs.fprs[i]);
}
@ -331,6 +332,7 @@ static void restore_sigregs(CPUS390XState *env, target_sigregs *sc)
for (i = 0; i < 16; i++) {
__get_user(env->aregs[i], &sc->regs.acrs[i]);
}
__get_user(env->fpc, &sc->fpregs.fpc);
for (i = 0; i < 16; i++) {
__get_user(*get_freg(env, i), &sc->fpregs.fprs[i]);
}