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. */
29void ** __attribute__ ((const))
30_dl_initial_error_catch_tsd (void)
31{
32 static __thread void *data;
33 return &data;
34}
35void **(*_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
44void ** __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