xref: /freebsd/sys/i386/include/sigframe.h (revision e9e8876a4d6afc1ad5315faaa191b25121a813d7)
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
41 struct 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 */
78 struct 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 freebsd4_ucontext 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