For SIGILL, SIGFPE and SIGTRAP the PSW must point after the
instruction, and at the instruction for other signals. Currently under
qemu-user for SIGFILL and SIGFPE it points at the instruction.
Fix by advancing psw.addr for these signals.
Buglink: https://gitlab.com/qemu-project/qemu/-/issues/319
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Co-developed-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
---
linux-user/s390x/cpu_loop.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/linux-user/s390x/cpu_loop.c b/linux-user/s390x/cpu_loop.c
index 30568139df..6e7dfb290a 100644
--- a/linux-user/s390x/cpu_loop.c
+++ b/linux-user/s390x/cpu_loop.c
@@ -64,7 +64,13 @@ void cpu_loop(CPUS390XState *env)
case EXCP_DEBUG:
sig = TARGET_SIGTRAP;
n = TARGET_TRAP_BRKPT;
- goto do_signal_pc;
+ /*
+ * For SIGTRAP the PSW must point after the instruction, which it
+ * already does thanks to s390x_tr_tb_stop(). si_addr doesn't need
+ * to be filled.
+ */
+ addr = 0;
+ goto do_signal;
case EXCP_PGM:
n = env->int_pgm_code;
switch (n) {
@@ -133,6 +139,10 @@ void cpu_loop(CPUS390XState *env)
do_signal_pc:
addr = env->psw.addr;
+ /*
+ * For SIGILL and SIGFPE the PSW must point after the instruction.
+ */
+ env->psw.addr += env->int_pgm_ilen;
do_signal:
info.si_signo = sig;
info.si_errno = 0;