PATCH: Add x32 gettimeofday

["H.J. Lu" <hongjiu dot lu at intel dot com>]

Hi,

X32 always has gettimeofday in vDSO.  Here is a patch to use it.  Tested
on Linux/x32.  OK to install?

Thanks.

H.J.
---
	* sysdeps/unix/sysv/linux/x86_64/x32/gettimeofday.c: New file.

diff --git a/sysdeps/unix/sysv/linux/x86_64/x32/gettimeofday.c b/sysdeps/unix/sysv/linux/x86_64/x32/gettimeofday.c
new file mode 100644
index 0000000..4e94d53
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/x32/gettimeofday.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifdef SHARED
+# include <dl-vdso.h>
+
+void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday");
+
+void *
+gettimeofday_ifunc (void)
+{
+  PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
+
+  return _dl_vdso_vsym ("__vdso_gettimeofday", &linux26);
+}
+__asm (".type __gettimeofday, %gnu_indirect_function");
+#else
+# include <errno.h>
+# include <sysdep.h>
+# include <sys/time.h>
+
+int
+__gettimeofday (struct timeval *tv, struct timezone *tz)
+{
+  return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
+}
+#endif
+
+weak_alias (__gettimeofday, gettimeofday)
+strong_alias (__gettimeofday, __gettimeofday_internal)