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beff1d13 | 1 | /* ABI compatibility for 'fork' 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 UD |
19 | |
20 | #include <unistd.h> | |
beff1d13 | 21 | #include <shlib-compat.h> |
76a50749 | 22 | |
beff1d13 RM |
23 | /* libpthread once had its own fork, though there was no apparent reason |
24 | for it. There is no use in having a separate symbol in libpthread, but | |
25 | the historical ABI requires it. For static linking, there is no need to | |
26 | provide anything here--the libc version will be linked in. For shared | |
27 | library ABI compatibility, there must be __fork and fork symbols in | |
f06f3f05 | 28 | libpthread.so. |
76a50749 | 29 | |
f06f3f05 FW |
30 | With an IFUNC resolver, it would be possible to avoid the |
31 | indirection, but the IFUNC resolver might run before the | |
32 | __libc_fork symbol has been relocated, in which case the IFUNC | |
33 | resolver would not be able to provide the correct address. */ | |
beff1d13 | 34 | |
f06f3f05 | 35 | #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) |
beff1d13 RM |
36 | |
37 | static pid_t __attribute__ ((used)) | |
38 | fork_compat (void) | |
76a50749 UD |
39 | { |
40 | return __libc_fork (); | |
41 | } | |
beff1d13 | 42 | |
f06f3f05 FW |
43 | strong_alias (fork_compat, fork_alias) |
44 | compat_symbol (libpthread, fork_alias, fork, GLIBC_2_0); | |
beff1d13 | 45 | |
f06f3f05 FW |
46 | strong_alias (fork_compat, __fork_alias) |
47 | compat_symbol (libpthread, __fork_alias, __fork, GLIBC_2_0); | |
beff1d13 RM |
48 | |
49 | #endif |