1/* time -- Get number of seconds since Epoch. 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 <time.h>
20
21#ifdef SHARED
22
23#include <dl-vdso.h>
24#include <errno.h>
25
26static time_t
27__time_syscall (time_t *t)
28{
29 INTERNAL_SYSCALL_DECL (err);
30 return INTERNAL_SYSCALL (time, err, 1, t);
31}
32
33# ifndef time_type
34/* The i386 time.c includes this file with a defined time_type macro.
35 For x86_64 we have to define it to time as the internal symbol is the
36 ifunc'ed one. */
37# define time_type time
38# endif
39
40#undef INIT_ARCH
41#define INIT_ARCH() PREPARE_VERSION_KNOWN (linux26, LINUX_2_6);
42/* If the vDSO is not available we fall back on the syscall. */
43libc_ifunc_hidden (time_type, time,
44 (_dl_vdso_vsym ("__vdso_time", &linux26)
45 ?: &__time_syscall))
46libc_hidden_def (time)
47
48#else
49
50# include <sysdep.h>
51
52time_t
53time (time_t *t)
54{
55 INTERNAL_SYSCALL_DECL (err);
56 return INTERNAL_SYSCALL (time, err, 1, t);
57}
58
59#endif
60