1 | /* gettimeofday - get the time. Linux/x86 version. |
2 | Copyright (C) 2015-2017 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 | |
26 | static 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. */ |
42 | libc_ifunc_hidden (__gettimeofday_type, __gettimeofday, |
43 | (_dl_vdso_vsym ("__vdso_gettimeofday" , &linux26) |
44 | ?: &__gettimeofday_syscall)) |
45 | libc_hidden_def (__gettimeofday) |
46 | |
47 | #else |
48 | |
49 | # include <sysdep.h> |
50 | # include <errno.h> |
51 | |
52 | int |
53 | __gettimeofday (struct timeval *tv, struct timezone *tz) |
54 | { |
55 | return INLINE_SYSCALL (gettimeofday, 2, tv, tz); |
56 | } |
57 | libc_hidden_def (__gettimeofday) |
58 | |
59 | #endif |
60 | weak_alias (__gettimeofday, gettimeofday) |
61 | libc_hidden_weak (gettimeofday) |
62 | |