1 | /* Initialization code run first thing by the ELF startup code. Linux/x86-64. |
2 | Copyright (C) 2007-2018 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 | #ifdef SHARED |
20 | # include <time.h> |
21 | # include <sysdep.h> |
22 | # include <dl-vdso.h> |
23 | # include <libc-vdso.h> |
24 | |
25 | long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *) |
26 | attribute_hidden; |
27 | long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *) |
28 | attribute_hidden; |
29 | |
30 | extern __typeof (clock_gettime) __syscall_clock_gettime attribute_hidden; |
31 | |
32 | |
33 | static inline void |
34 | __vdso_platform_setup (void) |
35 | { |
36 | PREPARE_VERSION (linux26, "LINUX_2.6" , 61765110); |
37 | |
38 | void *p = _dl_vdso_vsym ("__vdso_clock_gettime" , &linux26); |
39 | if (p == NULL) |
40 | p = __syscall_clock_gettime; |
41 | PTR_MANGLE (p); |
42 | VDSO_SYMBOL(clock_gettime) = p; |
43 | |
44 | p = _dl_vdso_vsym ("__vdso_getcpu" , &linux26); |
45 | PTR_MANGLE (p); |
46 | VDSO_SYMBOL(getcpu) = p; |
47 | } |
48 | |
49 | # define VDSO_SETUP __vdso_platform_setup |
50 | #endif |
51 | |
52 | #include <csu/init-first.c> |
53 | |