1/* gettimeofday - get the time. Linux/x86 version.
2 Copyright (C) 2015-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <sys/time.h>
20
21#ifdef SHARED
22
23# include <dl-vdso.h>
24# include <errno.h>
25
26static int
27__gettimeofday_syscall (struct timeval *tv, struct timezone *tz)
28{
29 return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
30}
31
32void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday");
33
34void *
35gettimeofday_ifunc (void)
36{
37 PREPARE_VERSION_KNOWN (linux26, LINUX_2_6);
38
39 /* If the vDSO is not available we fall back to syscall. */
40 return (_dl_vdso_vsym ("__vdso_gettimeofday", &linux26)
41 ?: (void*) (&__gettimeofday_syscall));
42}
43asm (".type __gettimeofday, %gnu_indirect_function");
44
45libc_ifunc_hidden_def(__gettimeofday)
46
47#else
48
49# include <sysdep.h>
50# include <errno.h>
51
52int
53__gettimeofday (struct timeval *tv, struct timezone *tz)
54{
55 return INLINE_SYSCALL (gettimeofday, 2, tv, tz);
56}
57libc_hidden_def (__gettimeofday)
58
59#endif
60weak_alias (__gettimeofday, gettimeofday)
61libc_hidden_weak (gettimeofday)
62