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 _MACHINE_SIGFRAME_H_
34#define	_MACHINE_SIGFRAME_H_
35
36/*
37 * Signal frames, arguments passed to application signal handlers.
38 */
39#ifdef _KERNEL
40#ifdef COMPAT_43
41struct osigframe {
42	/*
43	 * The first four members may be used by applications.
44	 */
45
46	register_t	sf_signum;
47
48	/*
49	 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
50	 * pointing to sf_siginfo for SA_SIGINFO handlers.
51	 */
52	register_t	sf_arg2;
53
54	/* Points to sf_siginfo.si_sc. */
55	register_t	sf_scp;
56
57	register_t	sf_addr;
58
59	/*
60	 * The following arguments are not constrained by the
61	 * function call protocol.
62	 * Applications are not supposed to access these members,
63	 * except using the pointers we provide in the first three
64	 * arguments.
65	 */
66
67	union {
68		__osiginfohandler_t	*sf_action;
69		__sighandler_t		*sf_handler;
70	} sf_ahu;
71
72	/* In the SA_SIGINFO case, sf_arg2 points here. */
73	osiginfo_t	sf_siginfo;
74};
75#endif
76#ifdef COMPAT_FREEBSD4
77/* FreeBSD 4.x */
78struct sigframe4 {
79	register_t	sf_signum;
80	register_t	sf_siginfo;	/* code or pointer to sf_si */
81	register_t	sf_ucontext;	/* points to sf_uc */
82	register_t	sf_addr;	/* undocumented 4th arg */
83
84	union {
85		__siginfohandler_t	*sf_action;
86		__sighandler_t		*sf_handler;
87	} sf_ahu;
88	struct ucontext4 sf_uc;		/* = *sf_ucontext */
89	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
90};
91#endif
92#endif
93
94#include <x86/sigframe.h>
95
96#endif /* !_MACHINE_SIGFRAME_H_ */
97