| 1 | /* __errno_location -- helper function for locating per-thread errno value |
|---|
| 2 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
|---|
| 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 |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #if IS_IN (rtld) |
|---|
| 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. */ |
|---|
| 25 | static int rtld_errno; |
|---|
| 26 | int * weak_function |
|---|
| 27 | __errno_location (void) |
|---|
| 28 | { |
|---|
| 29 | return &rtld_errno; |
|---|
| 30 | } |
|---|
| 31 | libc_hidden_weak (__errno_location) |
|---|
| 32 | #else |
|---|
| 33 | #include "../../../csu/errno-loc.c" |
|---|
| 34 | #endif |
|---|
| 35 | |
|---|
