FreeBSD/Linux Kernel Cross Reference
sys/sys/ucontext.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1999 Marcel Moolenaar
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in this position and unchanged.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * $FreeBSD$
31 */
32
33 #ifndef _SYS_UCONTEXT_H_
34 #define _SYS_UCONTEXT_H_
35
36 #include <sys/signal.h>
37 #include <machine/ucontext.h>
38 #include <sys/_ucontext.h>
39
40 #define UCF_SWAPPED 0x00000001 /* Used by swapcontext(3). */
41
42 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
43 #if defined(__i386__)
44 struct ucontext4 {
45 sigset_t uc_sigmask;
46 struct mcontext4 uc_mcontext;
47 struct ucontext4 *uc_link;
48 stack_t uc_stack;
49 int __spare__[8];
50 };
51 #else /* __i386__ */
52 #define ucontext4 ucontext
53 #endif /* __i386__ */
54 #endif /* _KERNEL */
55
56 #ifndef _KERNEL
57
58 __BEGIN_DECLS
59
60 int getcontext(ucontext_t *) __returns_twice;
61 ucontext_t *getcontextx(void);
62 int setcontext(const ucontext_t *);
63 void makecontext(ucontext_t *, void (*)(void), int, ...);
64 int signalcontext(ucontext_t *, int, __sighandler_t *);
65 int swapcontext(ucontext_t *, const ucontext_t *);
66
67 #if __BSD_VISIBLE
68 int __getcontextx_size(void);
69 int __fillcontextx(char *ctx) __returns_twice;
70 int __fillcontextx2(char *ctx);
71 #endif
72
73 __END_DECLS
74
75 #else /* _KERNEL */
76
77 struct thread;
78
79 /*
80 * Flags for get_mcontext(). The low order 4 bits (i.e a mask of 0x0f) are
81 * reserved for use by machine independent code. All other bits are for use
82 * by machine dependent code.
83 */
84 #define GET_MC_CLEAR_RET 1
85
86 /* Machine-dependent functions: */
87 int get_mcontext(struct thread *, mcontext_t *, int);
88 int set_mcontext(struct thread *, mcontext_t *);
89
90 #endif /* !_KERNEL */
91
92 #endif /* !_SYS_UCONTEXT_H_ */
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