1/* $NetBSD: tls.h,v 1.2 2017/11/19 07:41:52 kamil Exp $ */
2/*-
3 * Copyright (c) 2011 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Joerg Sonnenberger.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef _SYS_TLS_H_
32#define _SYS_TLS_H_
33
34#include <sys/cdefs.h>
35#include <machine/types.h>
36
37#if defined(__HAVE_TLS_VARIANT_I) || defined(__HAVE_TLS_VARIANT_II)
38
39#if defined(__HAVE_TLS_VARIANT_I) && defined(__HAVE_TLS_VARIANT_II)
40#error Only one TLS variant can be supported at a time
41#endif
42
43struct tls_tcb {
44#ifdef __HAVE_TLS_VARIANT_I
45 void **tcb_dtv;
46 void *tcb_pthread;
47#else
48 void *tcb_self;
49 void **tcb_dtv;
50 void *tcb_pthread;
51#endif
52};
53
54__BEGIN_PUBLIC_DECLS
55struct tls_tcb *_rtld_tls_allocate(void);
56void _rtld_tls_free(struct tls_tcb *);
57__END_PUBLIC_DECLS
58#endif /* __HAVE_TLS_VARIANT_I || __HAVE_TLS_VARIANT_II */
59
60#endif /* _SYS_TLS_H_ */
61