+ int r;
+
+#ifdef VDSO_CGT_SYM
+ int (*f)(clockid_t, struct timespec *) =
+ (int (*)(clockid_t, struct timespec *))vdso_func;
+ if (f) {
+ r = f(clk, ts);
+ if (!r) return r;
+ if (r == -EINVAL) return __syscall_ret(r);
+ /* Fall through on errors other than EINVAL. Some buggy
+ * vdso implementations return ENOSYS for clocks they
+ * can't handle, rather than making the syscall. This
+ * also handles the case where cgt_init fails to find
+ * a vdso function to use. */
+ }
+#endif
+
+ r = __syscall(SYS_clock_gettime, clk, ts);
+ if (r == -ENOSYS) {
+ if (clk == CLOCK_REALTIME) {
+ __syscall(SYS_gettimeofday, ts, 0);
+ ts->tv_nsec = (int)ts->tv_nsec * 1000;
+ return 0;
+ }
+ r = -EINVAL;
+ }
+ return __syscall_ret(r);