use separate sigaction buffers for old and new data

in signal() it is needed since __sigaction uses restrict in parameters
and sharing the buffer is technically an aliasing error. do the same
for the syscall, as at least qemu-user does not handle it properly.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/signal/signal.c b/src/signal/signal.c
index 07346a8a..9d2f23ab 100644
--- a/src/signal/signal.c
+++ b/src/signal/signal.c
@@ -7,10 +7,10 @@ int __sigaction(int, const struct sigaction *, struct sigaction *);
 
 void (*signal(int sig, void (*func)(int)))(int)
 {
-	struct sigaction sa = { .sa_handler = func, .sa_flags = SA_RESTART };
-	if (__sigaction(sig, &sa, &sa) < 0)
+	struct sigaction sa_old, sa = { .sa_handler = func, .sa_flags = SA_RESTART };
+	if (__sigaction(sig, &sa, &sa_old) < 0)
 		return SIG_ERR;
-	return sa.sa_handler;
+	return sa_old.sa_handler;
 }
 
 weak_alias(signal, bsd_signal);