gettimeofday() vdso support

libc/sysdeps/linux/common/gettimeofday.c

@@ -9,5 +9,28 @@
 #include <sys/syscall.h>
 #include <sys/time.h>
 
-_syscall2(int, gettimeofday, struct timeval *, tv, __timezone_ptr_t, tz)
+#include "ldso.h"
+
+
+
+#ifdef __VDSO_SUPPORT__
+typedef int (*gettimeofday_func)(struct timeval * tv, __timezone_ptr_t tz);
+#endif
+
+int gettimeofday(struct timeval * tv, __timezone_ptr_t tz) {
+
+    #ifdef __VDSO_SUPPORT__
+        if ( _dl__vdso_gettimeofday != 0 ){
+            gettimeofday_func func= _dl__vdso_gettimeofday;
+            return func( tv, tz );
+
+        }else{
+            _syscall2_body(int, gettimeofday, struct timeval *, tv, __timezone_ptr_t, tz)
+        }
+    #else
+        _syscall2_body(int, gettimeofday, struct timeval *, tv, __timezone_ptr_t, tz)
+    #endif
+}
+
+
 libc_hidden_def(gettimeofday)