sigframe.h revision 90776 
1/*-
2 * Copyright (c) 1999 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
16 *
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.
27 *
28 * $FreeBSD: head/sys/i386/include/sigframe.h 90776 2002-02-17 17:40:34Z deischen $
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
38struct osigframe {
39	/*
40	 * The first four members may be used by applications.
41	 */
42
43	register_t	sf_signum;
44
45	/*
46	 * Either 'int' for old-style FreeBSD handler or 'siginfo_t *'
47	 * pointing to sf_siginfo for SA_SIGINFO handlers.
48	 */
49	register_t	sf_arg2;
50
51	/* Points to sf_siginfo.si_sc. */
52	register_t	sf_scp;
53
54	register_t	sf_addr;
55
56	/*
57	 * The following arguments are not constrained by the
58	 * function call protocol.
59	 * Applications are not supposed to access these members,
60	 * except using the pointers we provide in the first three
61	 * arguments.
62	 */
63
64	union {
65		__osiginfohandler_t	*sf_action;
66		__sighandler_t		*sf_handler;
67	} sf_ahu;
68
69	/* In the SA_SIGINFO case, sf_arg2 points here. */
70	osiginfo_t	sf_siginfo;
71};
72#endif
73
74struct sigframe {
75	/*
76	 * The first four members may be used by applications.
77	 *
78	 * NOTE: The 4th argument is undocumented, ill commented
79	 * on and seems to be somewhat BSD "standard".  Handlers
80	 * installed with sigvec may be using it.
81	 */
82	register_t	sf_signum;
83	register_t	sf_siginfo;	/* code or pointer to sf_si */
84	register_t	sf_ucontext;	/* points to sf_uc */
85	register_t	sf_addr;	/* undocumented 4th arg */
86
87	union {
88		__siginfohandler_t	*sf_action;
89		__sighandler_t		*sf_handler;
90	} sf_ahu;
91	ucontext_t	sf_uc;		/* = *sf_ucontext */
92	siginfo_t	sf_si;		/* = *sf_siginfo (SA_SIGINFO case) */
93};
94
95#endif /* !_MACHINE_SIGFRAME_H_ */
96