Passing the tswapped structure to strace means that
our internal si_type is also gone, which then aborts
in print_siginfo.
Fixes: 4d6d8a05a0a ("linux-user: Move tswap_siginfo out of target code")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/signal.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/linux-user/signal.c b/linux-user/signal.c
index a93148a4cb..05dc4afb52 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -1173,6 +1173,7 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
CPUState *cpu = env_cpu(cpu_env);
abi_ulong handler;
sigset_t set;
+ target_siginfo_t unswapped;
target_sigset_t target_old_set;
struct target_sigaction *sa;
TaskState *ts = get_task_state(cpu);
@@ -1182,9 +1183,14 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
k->pending = 0;
/*
- * Writes out siginfo values byteswapped, accordingly to the target. It also
- * cleans the si_type from si_code making it correct for the target.
+ * Writes out siginfo values byteswapped, accordingly to the target.
+ * It also cleans the si_type from si_code making it correct for
+ * the target. We must hold on to the original unswapped copy for
+ * strace below, because si_type is still required there.
*/
+ if (unlikely(qemu_loglevel_mask(LOG_STRACE))) {
+ unswapped = k->info;
+ }
tswap_siginfo(&k->info, &k->info);
sig = gdb_handlesig(cpu, sig, NULL, &k->info, sizeof(k->info));
@@ -1197,7 +1203,7 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
}
if (unlikely(qemu_loglevel_mask(LOG_STRACE))) {
- print_taken_signal(sig, &k->info);
+ print_taken_signal(sig, &unswapped);
}
if (handler == TARGET_SIG_DFL) {
--
2.34.1