xref: /freebsd/sys/i386/include/signal.h (revision 6780ab54325a71e7e70112b11657973edde8655e)
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  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  *	@(#)signal.h	8.1 (Berkeley) 6/11/93
34  * $FreeBSD$
35  */
36 
37 #ifndef _MACHINE_SIGNAL_H_
38 #define	_MACHINE_SIGNAL_H_
39 
40 #include <sys/cdefs.h>
41 #include <sys/_sigset.h>
42 
43 /*
44  * Machine-dependent signal definitions
45  */
46 
47 typedef int sig_atomic_t;
48 
49 #if __XSI_VISIBLE
50 /*
51  * Minimum signal stack size. The current signal frame
52  * for i386 is 408 bytes large.
53  */
54 #define	MINSIGSTKSZ	(512 * 4)
55 #endif
56 
57 #if __BSD_VISIBLE
58 #include <machine/trap.h>	/* codes for SIGILL, SIGFPE */
59 
60 /*
61  * Only the kernel should need these old type definitions.
62  */
63 #if defined(_KERNEL) && defined(COMPAT_43)
64 /*
65  * Information pushed on stack when a signal is delivered.
66  * This is used by the kernel to restore state following
67  * execution of the signal handler.  It is also made available
68  * to the handler to allow it to restore state properly if
69  * a non-standard exit is performed.
70  */
71 struct osigcontext {
72 	int	sc_onstack;		/* sigstack state to restore */
73 	osigset_t sc_mask;		/* signal mask to restore */
74 	int	sc_esp;			/* machine state follows: */
75 	int	sc_ebp;
76 	int	sc_isp;
77 	int	sc_eip;
78 	int	sc_efl;
79 	int	sc_es;
80 	int	sc_ds;
81 	int	sc_cs;
82 	int	sc_ss;
83 	int	sc_edi;
84 	int	sc_esi;
85 	int	sc_ebx;
86 	int	sc_edx;
87 	int	sc_ecx;
88 	int	sc_eax;
89 	int	sc_gs;
90 	int	sc_fs;
91 	int	sc_trapno;
92 	int	sc_err;
93 };
94 #endif
95 
96 /*
97  * The sequence of the fields/registers in struct sigcontext should match
98  * those in mcontext_t.
99  */
100 struct sigcontext {
101 	struct __sigset sc_mask;	/* signal mask to restore */
102 	int	sc_onstack;		/* sigstack state to restore */
103 	int	sc_gs;			/* machine state (struct trapframe) */
104 	int	sc_fs;
105 	int	sc_es;
106 	int	sc_ds;
107 	int	sc_edi;
108 	int	sc_esi;
109 	int	sc_ebp;
110 	int	sc_isp;
111 	int	sc_ebx;
112 	int	sc_edx;
113 	int	sc_ecx;
114 	int	sc_eax;
115 	int	sc_trapno;
116 	int	sc_err;
117 	int	sc_eip;
118 	int	sc_cs;
119 	int	sc_efl;
120 	int	sc_esp;
121 	int	sc_ss;
122 	int	sc_len;			/* sizeof(mcontext_t) */
123 	/*
124 	 * XXX - See <machine/ucontext.h> and <machine/npx.h> for
125 	 *       the following fields.
126 	 */
127 	int	sc_fpformat;
128 	int	sc_ownedfp;
129 	int	sc_spare1[1];
130 	int	sc_fpstate[128] __aligned(16);
131 	int	sc_spare2[8];
132 };
133 
134 #define	sc_sp		sc_esp
135 #define	sc_fp		sc_ebp
136 #define	sc_pc		sc_eip
137 #define	sc_ps		sc_efl
138 #define	sc_eflags	sc_efl
139 
140 #endif /* __BSD_VISIBLE */
141 
142 #endif /* !_MACHINE_SIGNAL_H_ */
143