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-rw-r--r--src/time/clock_gettime.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/src/time/clock_gettime.c b/src/time/clock_gettime.c
index ce9f2209..799251d8 100644
--- a/src/time/clock_gettime.c
+++ b/src/time/clock_gettime.c
@@ -3,6 +3,7 @@
 #include <stdint.h>
 #include "syscall.h"
 #include "libc.h"
+#include "atomic.h"
 
 static int sc_clock_gettime(clockid_t clk, struct timespec *ts)
 {
@@ -20,14 +21,21 @@ static int sc_clock_gettime(clockid_t clk, struct timespec *ts)
 	return -1;
 }
 
-weak_alias(sc_clock_gettime, __vdso_clock_gettime);
-
-int (*__cgt)(clockid_t, struct timespec *) = __vdso_clock_gettime;
+void *__vdsosym(const char *, const char *);
 
 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);
+#ifdef VDSO_CGT_SYM
+	static int (*cgt)(clockid_t, struct timespec *);
+	if (!cgt) {
+		void *f = __vdsosym(VDSO_CGT_VER, VDSO_CGT_SYM);
+		if (!f) f = (void *)sc_clock_gettime;
+		a_cas_p(&cgt, 0, f);
+	}
+	return cgt(clk, ts);
+#else
+	return sc_clock_gettime(clk, ts);
+#endif
 }
 
 weak_alias(__clock_gettime, clock_gettime);