1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2019 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #ifndef _PICOTLS_H_
37 #define _PICOTLS_H_
38
39 #include <sys/cdefs.h>
40
41 #ifdef PICOLIBC_TLS
42
43 #include <sys/types.h>
44
45 _BEGIN_STD_C
46
47 extern char __tls_size[];
48
_tls_size(void)49 static inline size_t _tls_size(void) { return (size_t) (uintptr_t) __tls_size; }
50
51 extern char __tls_align[];
52
_tls_align(void)53 static inline size_t _tls_align(void) { return (size_t) (uintptr_t) __tls_align; }
54
55 /*
56 * Initialize a TLS block, copying the data segment from flash and
57 * zeroing the BSS segment.
58 */
59 void
60 _init_tls(void *tls);
61
62 /* Set the TLS pointer to the specific block */
63 void
64 _set_tls(void *tls);
65
66 _END_STD_C
67
68 #endif
69
70 #endif /* _PICOTLS_H_ */
71
