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
31#ifndef _X86_SIGFRAME_H_
32#define	_X86_SIGFRAME_H_
33
34/*
35 * Signal frames, arguments passed to application signal handlers.
36 */
37
38#ifdef __i386__
39struct sigframe {
40	/*
41	 * The first four members may be used by applications.
42	 *
43	 * NOTE: The 4th argument is undocumented, ill commented
44	 * on and seems to be somewhat BSD "standard".  Handlers
45	 * installed with sigvec may be using it.
46	 */
47	register_t	sf_signum;
48	register_t	sf_siginfo;	/* code or pointer to sf_si */
49	register_t	sf_ucontext;	/* points to sf_uc */
50	register_t	sf_addr;	/* undocumented 4th arg */
51
52	union {
53		__siginfohandler_t	*sf_action;
54		__sighandler_t		*sf_handler;
55	} sf_ahu;
56	ucontext_t	sf_uc;		/* = *sf_ucontext */
57	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
58};
59#endif /* __i386__ */
60
61#ifdef __amd64__
62struct sigframe {
63	union {
64		__siginfohandler_t	*sf_action;
65		__sighandler_t		*sf_handler;
66	} sf_ahu;
67	ucontext_t	sf_uc;		/* = *sf_ucontext */
68	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
69};
70#endif /* __amd64__ */
71
72#endif /* _X86_SIGFRAME_H_ */