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 _MACHINE_SIGFRAME_H_
32#define	_MACHINE_SIGFRAME_H_
33
34/*
35 * Signal frames, arguments passed to application signal handlers.
36 */
37#ifdef _KERNEL
38#ifdef COMPAT_43
39struct osigframe {
40	/*
41	 * The first four members may be used by applications.
42	 */
43
44	register_t	sf_signum;
45
46	/*
47	 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
48	 * pointing to sf_siginfo for SA_SIGINFO handlers.
49	 */
50	register_t	sf_arg2;
51
52	/* Points to sf_siginfo.si_sc. */
53	register_t	sf_scp;
54
55	register_t	sf_addr;
56
57	/*
58	 * The following arguments are not constrained by the
59	 * function call protocol.
60	 * Applications are not supposed to access these members,
61	 * except using the pointers we provide in the first three
62	 * arguments.
63	 */
64
65	union {
66		__osiginfohandler_t	*sf_action;
67		__sighandler_t		*sf_handler;
68	} sf_ahu;
69
70	/* In the SA_SIGINFO case, sf_arg2 points here. */
71	osiginfo_t	sf_siginfo;
72};
73#endif
74#ifdef COMPAT_FREEBSD4
75/* FreeBSD 4.x */
76struct freebsd4_sigframe {
77	register_t	sf_signum;
78	register_t	sf_siginfo;	/* code or pointer to sf_si */
79	register_t	sf_ucontext;	/* points to sf_uc */
80	register_t	sf_addr;	/* undocumented 4th arg */
81
82	union {
83		__siginfohandler_t	*sf_action;
84		__sighandler_t		*sf_handler;
85	} sf_ahu;
86	struct freebsd4_ucontext sf_uc;		/* = *sf_ucontext */
87	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
88};
89#endif
90#endif
91
92#include <x86/sigframe.h>
93
94#endif /* !_MACHINE_SIGFRAME_H_ */