* Copyright 2006 Andi Kleen, SUSE Labs.
* Subject to the GNU Public License, v.2
*
- * Fast user context implementation of clock_gettime and gettimeofday.
+ * Fast user context implementation of clock_gettime, gettimeofday, and time.
*
* The code should have no internal unresolved relocations.
* Check with readelf after changing.
}
int gettimeofday(struct timeval *, struct timezone *)
__attribute__((weak, alias("__vdso_gettimeofday")));
+
+/* This will break when the xtime seconds get inaccurate, but that is
+ * unlikely */
+
+static __always_inline long time_syscall(long *t)
+{
+ long secs;
+ asm volatile("syscall"
+ : "=a" (secs)
+ : "0" (__NR_time), "D" (t) : "cc", "r11", "cx", "memory");
+ return secs;
+}
+
+notrace time_t __vdso_time(time_t *t)
+{
+ unsigned seq;
+ time_t result;
+ if (unlikely(!VVAR(vsyscall_gtod_data).sysctl_enabled))
+ return time_syscall(t);
+
+ do {
+ seq = read_seqbegin(&VVAR(vsyscall_gtod_data).lock);
+
+ result = VVAR(vsyscall_gtod_data).wall_time_sec;
+
+ } while (read_seqretry(&VVAR(vsyscall_gtod_data).lock, seq));
+
+ if (t)
+ *t = result;
+ return result;
+}
+int time(time_t *t)
+ __attribute__((weak, alias("__vdso_time")));