FreeBSD/Linux Kernel Cross Reference
sys/sys/ucontext.h
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 * $FreeBSD$
29 */
30
31 #ifndef _SYS_UCONTEXT_H_
32 #define _SYS_UCONTEXT_H_
33
34 #include <sys/signal.h>
35 #include <machine/ucontext.h>
36
37 typedef struct __ucontext {
38 /*
39 * Keep the order of the first two fields. Also,
40 * keep them the first two fields in the structure.
41 * This way we can have a union with struct
42 * sigcontext and ucontext_t. This allows us to
43 * support them both at the same time.
44 * note: the union is not defined, though.
45 */
46 sigset_t uc_sigmask;
47 mcontext_t uc_mcontext;
48
49 struct __ucontext *uc_link;
50 stack_t uc_stack;
51 int uc_flags;
52 #define UCF_SWAPPED 0x00000001 /* Used by swapcontext(3). */
53 int __spare__[4];
54 } ucontext_t;
55
56 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
57 #if defined(__i386__)
58 struct ucontext4 {
59 sigset_t uc_sigmask;
60 struct mcontext4 uc_mcontext;
61 struct ucontext4 *uc_link;
62 stack_t uc_stack;
63 int __spare__[8];
64 };
65 #else /* __i386__ */
66 #define ucontext4 ucontext
67 #endif /* __i386__ */
68 #endif /* _KERNEL */
69
70 #ifndef _KERNEL
71
72 __BEGIN_DECLS
73
74 int getcontext(ucontext_t *);
75 int setcontext(const ucontext_t *);
76 void makecontext(ucontext_t *, void (*)(void), int, ...);
77 int signalcontext(ucontext_t *, int, __sighandler_t *);
78 int swapcontext(ucontext_t *, const ucontext_t *);
79
80 __END_DECLS
81
82 #else /* _KERNEL */
83
84 struct thread;
85
86 /*
87 * Flags for get_mcontext(). The low order 4 bits (i.e a mask of 0x0f) are
88 * reserved for use by machine independent code. All other bits are for use
89 * by machine dependent code.
90 */
91 #define GET_MC_CLEAR_RET 1
92
93 /* Machine-dependent functions: */
94 int get_mcontext(struct thread *, mcontext_t *, int);
95 int set_mcontext(struct thread *, const mcontext_t *);
96
97 #endif /* !_KERNEL */
98
99 #endif /* !_SYS_UCONTEXT_H_ */
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