1/* gettimeofday - get the time. Linux/x86 version.
2 Copyright (C) 2015-2019 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
32# ifndef __gettimeofday_type
33/* The i386 gettimeofday.c includes this file with a defined
34 __gettimeofday_type macro. For x86_64 we have to define it to __gettimeofday
35 as the internal symbol is the ifunc'ed one. */
36# define __gettimeofday_type __gettimeofday
37# endif
38
39# undef INIT_ARCH
40# define INIT_ARCH() PREPARE_VERSION_KNOWN (linux26, LINUX_2_6)
41/* If the vDSO is not available we fall back to syscall. */
42libc_ifunc_hidden (__gettimeofday_type, __gettimeofday,
43 (_dl_vdso_vsym ("__vdso_gettimeofday", &linux26)
44 ?: &__gettimeofday_syscall))
45libc_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