use alt signal stack when present for implementation-internal signals

[musl] / src / time / timer_gettime.c

diff --git a/src/time/timer_gettime.c b/src/time/timer_gettime.c
index 3d3156a..21c9d32 100644 (file)
--- a/src/time/timer_gettime.c
+++ b/src/time/timer_gettime.c
@@ -1,7 +1,28 @@
 #include <time.h>
+#include <limits.h>
 #include "pthread_impl.h"
 
 int timer_gettime(timer_t t, struct itimerspec *val)
 {
-       return syscall(SYS_timer_gettime, t->timerid, val);
+       if ((intptr_t)t < 0) {
+               pthread_t td = (void *)((uintptr_t)t << 1);
+               t = (void *)(uintptr_t)(td->timer_id & INT_MAX);
+       }
+#ifdef SYS_timer_gettime64
+       int r = -ENOSYS;
+       if (sizeof(time_t) > 4)
+               r = __syscall(SYS_timer_gettime64, t, val);
+       if (SYS_timer_gettime == SYS_timer_gettime64 || r!=-ENOSYS)
+               return __syscall_ret(r);
+       long val32[4];
+       r = __syscall(SYS_timer_gettime, t, val32);
+       if (!r) {
+               val->it_interval.tv_sec = val32[0];
+               val->it_interval.tv_nsec = val32[1];
+               val->it_value.tv_sec = val32[2];
+               val->it_value.tv_nsec = val32[3];
+       }
+       return __syscall_ret(r);
+#endif
+       return syscall(SYS_timer_gettime, t, val);
 }