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8c28bbc6 | 1 | /* ABI compatibility for 'system' symbol in libpthread ABI. |
bfff8b1b | 2 | Copyright (C) 2002-2017 Free Software Foundation, Inc. |
76a50749 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
76a50749 | 19 | |
76a50749 | 20 | #include <stdlib.h> |
8c28bbc6 | 21 | #include <shlib-compat.h> |
76a50749 | 22 | |
8c28bbc6 RM |
23 | /* libpthread once had its own 'system', though there was no apparent |
24 | reason for it. There is no use in having a separate symbol in | |
25 | libpthread, but the historical ABI requires it. For static linking, | |
26 | there is no need to provide anything here--the libc version will be | |
27 | linked in. For shared library ABI compatibility, there must be a | |
28 | 'system' symbol in libpthread.so; so we define it using IFUNC to | |
29 | redirect to the libc function. */ | |
76a50749 | 30 | |
8c28bbc6 RM |
31 | #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) |
32 | ||
33 | # if HAVE_IFUNC | |
34 | ||
75685c4d SL |
35 | extern __typeof(system) system_ifunc; |
36 | # undef INIT_ARCH | |
37 | # define INIT_ARCH() | |
38 | libc_ifunc (system_ifunc, &__libc_system) | |
8c28bbc6 RM |
39 | |
40 | # else /* !HAVE_IFUNC */ | |
41 | ||
42 | static int __attribute__ ((used)) | |
43 | system_compat (const char *line) | |
76a50749 | 44 | { |
270d9d47 | 45 | return __libc_system (line); |
76a50749 | 46 | } |
8c28bbc6 RM |
47 | strong_alias (system_compat, system_ifunc) |
48 | ||
49 | # endif /* HAVE_IFUNC */ | |
50 | ||
51 | compat_symbol (libpthread, system_ifunc, system, GLIBC_2_0); | |
52f3d213 | 52 | |
8c28bbc6 | 53 | #endif |