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: releng/11.2/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__)
42 struct 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
58 int getcontext(ucontext_t *) __returns_twice;
59 ucontext_t *getcontextx(void);
60 int setcontext(const ucontext_t *);
61 void makecontext(ucontext_t *, void (*)(void), int, ...);
62 int signalcontext(ucontext_t *, int, __sighandler_t *);
63 int swapcontext(ucontext_t *, const ucontext_t *);
64
65 #if __BSD_VISIBLE
66 int __getcontextx_size(void);
67 int __fillcontextx(char *ctx) __returns_twice;
68 int __fillcontextx2(char *ctx);
69 #endif
70
71 __END_DECLS
72
73 #else /* _KERNEL */
74
75 struct 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: */
85 int get_mcontext(struct thread *, mcontext_t *, int);
86 int set_mcontext(struct thread *, mcontext_t *);
87
88 #endif /* !_KERNEL */
89
90 #endif /* !_SYS_UCONTEXT_H_ */
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