signal.h revision 139790 
1/*-
2 * Copyright (c) 1986, 1989, 1991, 1993
3 *	The Regents of the University of California.  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 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)signal.h	8.1 (Berkeley) 6/11/93
30 * $FreeBSD: head/sys/i386/include/signal.h 139790 2005-01-06 22:18:23Z imp $
31 */
32
33#ifndef _MACHINE_SIGNAL_H_
34#define	_MACHINE_SIGNAL_H_
35
36#include <sys/cdefs.h>
37#include <sys/_sigset.h>
38
39/*
40 * Machine-dependent signal definitions
41 */
42
43typedef int sig_atomic_t;
44
45#if __XSI_VISIBLE
46/*
47 * Minimum signal stack size. The current signal frame
48 * for i386 is 408 bytes large.
49 */
50#define	MINSIGSTKSZ	(512 * 4)
51#endif
52
53#if __BSD_VISIBLE
54#include <machine/trap.h>	/* codes for SIGILL, SIGFPE */
55
56/*
57 * Only the kernel should need these old type definitions.
58 */
59#if defined(_KERNEL) && defined(COMPAT_43)
60/*
61 * Information pushed on stack when a signal is delivered.
62 * This is used by the kernel to restore state following
63 * execution of the signal handler.  It is also made available
64 * to the handler to allow it to restore state properly if
65 * a non-standard exit is performed.
66 */
67struct osigcontext {
68	int	sc_onstack;		/* sigstack state to restore */
69	osigset_t sc_mask;		/* signal mask to restore */
70	int	sc_esp;			/* machine state follows: */
71	int	sc_ebp;
72	int	sc_isp;
73	int	sc_eip;
74	int	sc_efl;
75	int	sc_es;
76	int	sc_ds;
77	int	sc_cs;
78	int	sc_ss;
79	int	sc_edi;
80	int	sc_esi;
81	int	sc_ebx;
82	int	sc_edx;
83	int	sc_ecx;
84	int	sc_eax;
85	int	sc_gs;
86	int	sc_fs;
87	int	sc_trapno;
88	int	sc_err;
89};
90#endif
91
92/*
93 * The sequence of the fields/registers in struct sigcontext should match
94 * those in mcontext_t.
95 */
96struct sigcontext {
97	struct __sigset sc_mask;	/* signal mask to restore */
98	int	sc_onstack;		/* sigstack state to restore */
99	int	sc_gs;			/* machine state (struct trapframe) */
100	int	sc_fs;
101	int	sc_es;
102	int	sc_ds;
103	int	sc_edi;
104	int	sc_esi;
105	int	sc_ebp;
106	int	sc_isp;
107	int	sc_ebx;
108	int	sc_edx;
109	int	sc_ecx;
110	int	sc_eax;
111	int	sc_trapno;
112	int	sc_err;
113	int	sc_eip;
114	int	sc_cs;
115	int	sc_efl;
116	int	sc_esp;
117	int	sc_ss;
118	int	sc_len;			/* sizeof(mcontext_t) */
119	/*
120	 * XXX - See <machine/ucontext.h> and <machine/npx.h> for
121	 *       the following fields.
122	 */
123	int	sc_fpformat;
124	int	sc_ownedfp;
125	int	sc_spare1[1];
126	int	sc_fpstate[128] __aligned(16);
127	int	sc_spare2[8];
128};
129
130#define	sc_sp		sc_esp
131#define	sc_fp		sc_ebp
132#define	sc_pc		sc_eip
133#define	sc_ps		sc_efl
134#define	sc_eflags	sc_efl
135
136#endif /* __BSD_VISIBLE */
137
138#endif /* !_MACHINE_SIGNAL_H_ */
139