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ec2a88b3 | 1 | /* ABI compatibility for 'longjmp' and 'siglongjmp' symbols in libpthread ABI. |
d614a753 | 2 | Copyright (C) 2002-2020 Free Software Foundation, Inc. |
e2982bf0 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 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
e2982bf0 UD |
19 | |
20 | #include <setjmp.h> | |
ec2a88b3 | 21 | #include <shlib-compat.h> |
e2982bf0 | 22 | |
ec2a88b3 RM |
23 | /* libpthread once had its own longjmp (and siglongjmp alias), though there |
24 | was no apparent reason for it. There is no use in having a separate | |
25 | symbol in libpthread, but the historical ABI requires it. For static | |
26 | linking, there is no need to provide anything here--the libc version | |
27 | will be linked in. For shared library ABI compatibility, there must be | |
fc5ad702 | 28 | longjmp and siglongjmp symbols in libpthread.so. |
ec2a88b3 | 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_longjmp symbol has | |
32 | been relocated, in which case the IFUNC resolver would not be able to | |
33 | provide the correct address. */ | |
ec2a88b3 | 34 | |
fc5ad702 | 35 | #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) |
ec2a88b3 RM |
36 | |
37 | static void __attribute__ ((noreturn, used)) | |
38 | longjmp_compat (jmp_buf env, int val) | |
e2982bf0 UD |
39 | { |
40 | __libc_longjmp (env, val); | |
41 | } | |
ec2a88b3 | 42 | |
fc5ad702 AS |
43 | strong_alias (longjmp_compat, longjmp_alias) |
44 | compat_symbol (libpthread, longjmp_alias, longjmp, GLIBC_2_0); | |
ec2a88b3 | 45 | |
fc5ad702 AS |
46 | strong_alias (longjmp_alias, siglongjmp_alias) |
47 | compat_symbol (libpthread, siglongjmp_alias, siglongjmp, GLIBC_2_0); | |
ec2a88b3 RM |
48 | |
49 | #endif |