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7d55d698 | 1 | /* __errno_location -- helper function for locating per-thread errno value |
2b778ceb | 2 | Copyright (C) 2002-2021 Free Software Foundation, Inc. |
7d55d698 RM |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
7d55d698 | 18 | |
dc33bef3 | 19 | #if IS_IN (rtld) |
79962d89 ST |
20 | /* rtld can not access TLS too early, thus rtld_errno. |
21 | ||
22 | Instead of making __open/__close pass errno from TLS to rtld_errno, simply | |
23 | use a weak __errno_location using rtld_errno, which will be overriden by the | |
24 | libc definition. */ | |
dc33bef3 ST |
25 | static int rtld_errno; |
26 | int * weak_function | |
7d55d698 RM |
27 | __errno_location (void) |
28 | { | |
dc33bef3 | 29 | return &rtld_errno; |
7d55d698 | 30 | } |
dc33bef3 ST |
31 | libc_hidden_weak (__errno_location) |
32 | #else | |
33 | #include "../../../csu/errno-loc.c" | |
34 | #endif |