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8c28bbc6 | 1 | /* ABI compatibility for 'system' symbol in libpthread ABI. |
04277e02 | 2 | Copyright (C) 2002-2019 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 | |
fc5ad702 | 28 | 'system' symbol in libpthread.so. |
76a50749 | 29 | |
fc5ad702 AS |
30 | With an IFUNC resolver, it would be possible to avoid the indirection, |
31 | but the IFUNC resolver might run before the __libc_system symbol has | |
32 | been relocated, in which case the IFUNC resolver would not be able to | |
33 | provide the correct address. */ | |
8c28bbc6 | 34 | |
fc5ad702 | 35 | #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) |
8c28bbc6 RM |
36 | |
37 | static int __attribute__ ((used)) | |
38 | system_compat (const char *line) | |
76a50749 | 39 | { |
270d9d47 | 40 | return __libc_system (line); |
76a50749 | 41 | } |
fc5ad702 AS |
42 | strong_alias (system_compat, system_alias) |
43 | compat_symbol (libpthread, system_alias, system, GLIBC_2_0); | |
52f3d213 | 44 | |
8c28bbc6 | 45 | #endif |