1 /*-
2 * Copyright (c) 2005 David Xu <davidxu@freebsd.org>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/9/lib/libthr/arch/arm/include/pthread_md.h 237397 2012-06-21 13:53:28Z marius $
27 */
28
29 /*
30 * Machine-dependent thread prototypes/definitions.
31 */
32 #ifndef _PTHREAD_MD_H_
33 #define _PTHREAD_MD_H_
34
35 #include <sys/types.h>
36 #include <machine/sysarch.h>
37 #include <stddef.h>
38
39 #define CPU_SPINWAIT
40 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
41
42 /*
43 * Variant II tcb, first two members are required by rtld.
44 */
45 struct tcb {
46 void *tcb_dtv; /* required by rtld */
47 struct pthread *tcb_thread; /* our hook */
48 };
49
50 /*
51 * The tcb constructors.
52 */
53 struct tcb *_tcb_ctor(struct pthread *, int);
54 void _tcb_dtor(struct tcb *);
55
56 /* Called from the thread to set its private data. */
57 static __inline void
_tcb_set(struct tcb * tcb)58 _tcb_set(struct tcb *tcb)
59 {
60 *((struct tcb **)ARM_TP_ADDRESS) = tcb;
61 }
62
63 /*
64 * Get the current tcb.
65 */
66 static __inline struct tcb *
_tcb_get(void)67 _tcb_get(void)
68 {
69 return (*((struct tcb **)ARM_TP_ADDRESS));
70 }
71
72 extern struct pthread *_thr_initial;
73
74 static __inline struct pthread *
_get_curthread(void)75 _get_curthread(void)
76 {
77 if (_thr_initial)
78 return (_tcb_get()->tcb_thread);
79 return (NULL);
80 }
81
82 #endif /* _PTHREAD_MD_H_ */
83