1 | /* Thread-local data used by error handling for runtime dynamic linker. |
2 | Copyright (C) 2002-2016 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 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #ifdef _LIBC_REENTRANT |
20 | |
21 | # include <ldsodefs.h> |
22 | # include <tls.h> |
23 | |
24 | # ifndef SHARED |
25 | |
26 | /* _dl_error_catch_tsd points to this for the single-threaded case. |
27 | It's reset by the thread library for multithreaded programs |
28 | if we're not using __thread. */ |
29 | void ** __attribute__ ((const)) |
30 | _dl_initial_error_catch_tsd (void) |
31 | { |
32 | static __thread void *data; |
33 | return &data; |
34 | } |
35 | void **(*_dl_error_catch_tsd) (void) __attribute__ ((const)) |
36 | = &_dl_initial_error_catch_tsd; |
37 | |
38 | # else |
39 | |
40 | /* libpthread sets _dl_error_catch_tsd to point to this function. |
41 | We define it here instead of in libpthread so that it doesn't |
42 | need to have a TLS segment of its own just for this one pointer. */ |
43 | |
44 | void ** __attribute__ ((const)) |
45 | __libc_dl_error_tsd (void) |
46 | { |
47 | static __thread void *data attribute_tls_model_ie; |
48 | return &data; |
49 | } |
50 | |
51 | # endif /* SHARED */ |
52 | |
53 | #endif /* _LIBC_REENTRANT */ |
54 | |