summaryrefslogtreecommitdiff
path: root/src/signal
diff options
context:
space:
mode:
authorTimo Teräs <timo.teras@iki.fi>2013-07-30 09:14:56 -0400
committerRich Felker <dalias@aerifal.cx>2013-07-30 09:14:56 -0400
commit48748143a34fb534e51378ec82816d7bbfb22df7 (patch)
tree079a45f547fa0ac4a45dd60ad9817e227b8a8f69 /src/signal
parent372a948b8139c6583045b2cd91b6b91fcb2e5881 (diff)
downloadmusl-48748143a34fb534e51378ec82816d7bbfb22df7.tar.gz
musl-48748143a34fb534e51378ec82816d7bbfb22df7.tar.bz2
musl-48748143a34fb534e51378ec82816d7bbfb22df7.tar.xz
musl-48748143a34fb534e51378ec82816d7bbfb22df7.zip
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.
Diffstat (limited to 'src/signal')
-rw-r--r--src/signal/sigaction.c10
-rw-r--r--src/signal/signal.c6
2 files changed, 8 insertions, 8 deletions
diff --git a/src/signal/sigaction.c b/src/signal/sigaction.c
index 7a72a44b..1f09bb96 100644
--- a/src/signal/sigaction.c
+++ b/src/signal/sigaction.c
@@ -14,7 +14,7 @@ weak_alias(dummy, __pthread_self_def);
int __libc_sigaction(int sig, const struct sigaction *restrict sa, struct sigaction *restrict old)
{
- struct k_sigaction ksa;
+ struct k_sigaction ksa, ksa_old;
if (sa) {
if ((uintptr_t)sa->sa_handler > 1UL)
__pthread_self_def();
@@ -23,12 +23,12 @@ int __libc_sigaction(int sig, const struct sigaction *restrict sa, struct sigact
ksa.restorer = (sa->sa_flags & SA_SIGINFO) ? __restore_rt : __restore;
memcpy(&ksa.mask, &sa->sa_mask, sizeof ksa.mask);
}
- if (syscall(SYS_rt_sigaction, sig, sa?&ksa:0, old?&ksa:0, sizeof ksa.mask))
+ if (syscall(SYS_rt_sigaction, sig, sa?&ksa:0, old?&ksa_old:0, sizeof ksa.mask))
return -1;
if (old) {
- old->sa_handler = ksa.handler;
- old->sa_flags = ksa.flags;
- memcpy(&old->sa_mask, &ksa.mask, sizeof ksa.mask);
+ old->sa_handler = ksa_old.handler;
+ old->sa_flags = ksa_old.flags;
+ memcpy(&old->sa_mask, &ksa_old.mask, sizeof ksa_old.mask);
}
return 0;
}
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);