use weak aliase rather than weak reference for vdso clock_gettime

[musl] / src / time / clock_gettime.c

diff --git a/src/time/clock_gettime.c b/src/time/clock_gettime.c
index dab09d5..ad5c09d 100644 (file)
--- a/src/time/clock_gettime.c
+++ b/src/time/clock_gettime.c
@@ -1,7 +1,33 @@
 #include <time.h>
+#include <errno.h>
+#include <stdint.h>
 #include "syscall.h"
+#include "libc.h"
 
-int clock_gettime(clockid_t clk, struct timespec *ts)
+static int sc_clock_gettime(clockid_t clk, struct timespec *ts)
 {
-       return syscall2(__NR_clock_gettime, clk, (long)ts);
+       int r = __syscall(SYS_clock_gettime, clk, ts);
+       if (!r) return r;
+       if (r == -ENOSYS) {
+               if (clk == CLOCK_REALTIME) {
+                       __syscall(SYS_gettimeofday, clk, ts, 0);
+                       ts->tv_nsec = (int)ts->tv_nsec * 1000;
+                       return 0;
+               }
+               r = -EINVAL;
+       }
+       errno = -r;
+       return -1;
 }
+
+weak_alias(sc_clock_gettime, __vdso_clock_gettime);
+
+int (*__cgt)(clockid_t, struct timespec *) = __vdso_clock_gettime;
+
+int __clock_gettime(clockid_t clk, struct timespec *ts)
+{
+       /* Conditional is to make this work prior to dynamic linking */
+       return __cgt ? __cgt(clk, ts) : sc_clock_gettime(clk, ts);
+}
+
+weak_alias(__clock_gettime, clock_gettime);