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ca677d3c | 1 | /* gettimeofday - get the time. Linux/x86 version. |
f7a9f785 | 2 | Copyright (C) 2015-2016 Free Software Foundation, Inc. |
ca677d3c AZ |
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> | |
7cbeabac AZ |
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 | } | |
ca677d3c AZ |
31 | |
32 | void *gettimeofday_ifunc (void) __asm__ ("__gettimeofday"); | |
33 | ||
34 | void * | |
35 | gettimeofday_ifunc (void) | |
36 | { | |
37 | PREPARE_VERSION_KNOWN (linux26, LINUX_2_6); | |
38 | ||
7cbeabac | 39 | /* If the vDSO is not available we fall back to syscall. */ |
ca677d3c | 40 | return (_dl_vdso_vsym ("__vdso_gettimeofday", &linux26) |
7cbeabac | 41 | ?: (void*) (&__gettimeofday_syscall)); |
ca677d3c AZ |
42 | } |
43 | asm (".type __gettimeofday, %gnu_indirect_function"); | |
44 | ||
45 | libc_ifunc_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) |