2 * Copyright (c) 1999 Marcel Moolenaar
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
31 #ifndef _SYS_UCONTEXT_H_
32 #define _SYS_UCONTEXT_H_
34 #include <sys/signal.h>
35 #include <machine/ucontext.h>
37 typedef struct __ucontext {
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.
47 mcontext_t uc_mcontext;
49 struct __ucontext *uc_link;
52 #define UCF_SWAPPED 0x00000001 /* Used by swapcontext(3). */
56 #if defined(_KERNEL) && defined(COMPAT_FREEBSD4)
60 struct mcontext4 uc_mcontext;
61 struct ucontext4 *uc_link;
66 #define ucontext4 ucontext
74 int getcontext(ucontext_t *) __returns_twice;
75 ucontext_t *getcontextx(void);
76 int setcontext(const ucontext_t *);
77 void makecontext(ucontext_t *, void (*)(void), int, ...);
78 int signalcontext(ucontext_t *, int, __sighandler_t *);
79 int swapcontext(ucontext_t *, const ucontext_t *);
82 int __getcontextx_size(void);
83 int __fillcontextx(char *ctx);
93 * Flags for get_mcontext(). The low order 4 bits (i.e a mask of 0x0f) are
94 * reserved for use by machine independent code. All other bits are for use
95 * by machine dependent code.
97 #define GET_MC_CLEAR_RET 1
99 /* Machine-dependent functions: */
100 int get_mcontext(struct thread *, mcontext_t *, int);
101 int set_mcontext(struct thread *, const mcontext_t *);
103 #endif /* !_KERNEL */
105 #endif /* !_SYS_UCONTEXT_H_ */