ucontext.h revision 331722 
1/*-
2 * Copyright (c) 1999 Marcel Moolenaar
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 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
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 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * $FreeBSD: stable/11/sys/sys/ucontext.h 331722 2018-03-29 02:50:57Z eadler $
29 */
30
31#ifndef _SYS_UCONTEXT_H_
32#define	_SYS_UCONTEXT_H_
33
34#include <sys/signal.h>
35#include <machine/ucontext.h>
36#include <sys/_ucontext.h>
37
38#define	UCF_SWAPPED	0x00000001	/* Used by swapcontext(3). */
39
40#if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
41#if defined(__i386__)
42struct ucontext4 {
43	sigset_t	uc_sigmask;
44	struct mcontext4 uc_mcontext;
45	struct ucontext4 *uc_link;
46	stack_t		uc_stack;
47	int		__spare__[8];
48};
49#else	/* __i386__ */
50#define ucontext4 ucontext
51#endif	/* __i386__ */
52#endif	/* _KERNEL */
53
54#ifndef _KERNEL
55
56__BEGIN_DECLS
57
58int	getcontext(ucontext_t *) __returns_twice;
59ucontext_t *getcontextx(void);
60int	setcontext(const ucontext_t *);
61void	makecontext(ucontext_t *, void (*)(void), int, ...);
62int	signalcontext(ucontext_t *, int, __sighandler_t *);
63int	swapcontext(ucontext_t *, const ucontext_t *);
64
65#if __BSD_VISIBLE
66int __getcontextx_size(void);
67int __fillcontextx(char *ctx) __returns_twice;
68int __fillcontextx2(char *ctx);
69#endif
70
71__END_DECLS
72
73#else /* _KERNEL */
74
75struct thread;
76
77/*
78 * Flags for get_mcontext().  The low order 4 bits (i.e a mask of 0x0f) are
79 * reserved for use by machine independent code.  All other bits are for use
80 * by machine dependent code.
81 */
82#define	GET_MC_CLEAR_RET	1
83
84/* Machine-dependent functions: */
85int	get_mcontext(struct thread *, mcontext_t *, int);
86int	set_mcontext(struct thread *, mcontext_t *);
87
88#endif /* !_KERNEL */
89
90#endif /* !_SYS_UCONTEXT_H_ */
91