1 /* $OpenBSD: freebsd_machdep.h,v 1.7 2003/06/02 23:27:47 millert Exp $ */
2 /* $NetBSD: freebsd_machdep.h,v 1.1 1995/10/10 01:22:35 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1986, 1989, 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * from: @(#)signal.h 8.1 (Berkeley) 6/11/93
36 * from: Id: signal.h,v 1.4 1994/08/21 04:55:30 paul Exp
37 *
38 * from: @(#)frame.h 5.2 (Berkeley) 1/18/91
39 * from: Id: frame.h,v 1.10 1995/03/16 18:11:42 bde Exp
40 */
41 #ifndef _FREEBSD_MACHDEP_H
42 #define _FREEBSD_MACHDEP_H
43
44 /*
45 * signal support
46 */
47
48 struct freebsd_sigcontext {
49 int sc_onstack; /* sigstack state to restore */
50 int sc_mask; /* signal mask to restore */
51 int sc_esp; /* machine state */
52 int sc_ebp;
53 int sc_isp;
54 int sc_eip;
55 int sc_eflags;
56 int sc_es;
57 int sc_ds;
58 int sc_cs;
59 int sc_ss;
60 int sc_edi;
61 int sc_esi;
62 int sc_ebx;
63 int sc_edx;
64 int sc_ecx;
65 int sc_eax;
66 };
67
68 struct freebsd_sigframe {
69 int sf_signum;
70 int sf_code;
71 struct freebsd_sigcontext *sf_scp;
72 char *sf_addr;
73 sig_t sf_handler;
74 struct freebsd_sigcontext sf_sc;
75 };
76
77 /*
78 * freebsd_ptrace(2) support
79 */
80
81 #define FREEBSD_USRSTACK 0xefbfe000 /* USRSTACK */
82 #define FREEBSD_U_AR0_OFFSET 0x0000045c /* offsetof(struct user, u_ar0) */
83 #define FREEBSD_U_SAVEFP_OFFSET 0x00000070
84 /* offsetof(struct user, u_pcb) + offsetof(struct pcb, pcb_savefpu) */
85
86 /* Exception/Trap Stack Frame */
87 struct freebsd_trapframe {
88 int tf_es;
89 int tf_ds;
90 int tf_edi;
91 int tf_esi;
92 int tf_ebp;
93 int tf_isp;
94 int tf_ebx;
95 int tf_edx;
96 int tf_ecx;
97 int tf_eax;
98 int tf_trapno;
99 /* below portion defined in 386 hardware */
100 int tf_err;
101 int tf_eip;
102 int tf_cs;
103 int tf_eflags;
104 /* below only when transitting rings (e.g. user to kernel) */
105 int tf_esp;
106 int tf_ss;
107 };
108
109 /* Environment information of floating point unit */
110 struct freebsd_env87 {
111 long en_cw; /* control word (16bits) */
112 long en_sw; /* status word (16bits) */
113 long en_tw; /* tag word (16bits) */
114 long en_fip; /* floating point instruction pointer */
115 u_short en_fcs; /* floating code segment selector */
116 u_short en_opcode; /* opcode last executed (11 bits ) */
117 long en_foo; /* floating operand offset */
118 long en_fos; /* floating operand segment selector */
119 };
120
121 /* Contents of each floating point accumulator */
122 struct freebsd_fpacc87 {
123 #ifdef dontdef /* too unportable */
124 u_long fp_mantlo; /* mantissa low (31:0) */
125 u_long fp_manthi; /* mantissa high (63:32) */
126 int fp_exp:15; /* exponent */
127 int fp_sgn:1; /* mantissa sign */
128 #else
129 u_char fp_bytes[10];
130 #endif
131 };
132
133 /* Floating point context */
134 struct freebsd_save87 {
135 struct freebsd_env87 sv_env; /* floating point control/status */
136 struct freebsd_fpacc87 sv_ac[8]; /* accumulator contents, 0-7 */
137 u_long sv_ex_sw; /* status word for last exception */
138 /*
139 * Bogus padding for emulators. Emulators should use their own
140 * struct and arrange to store into this struct (ending here)
141 * before it is inspected for ptracing or for core dumps. Some
142 * emulators overwrite the whole struct. We have no good way of
143 * knowing how much padding to leave. Leave just enough for the
144 * GPL emulator's i387_union (176 bytes total).
145 */
146 u_char sv_pad[64]; /* padding; used by emulators */
147 };
148
149 struct freebsd_ptrace_reg {
150 struct freebsd_trapframe freebsd_ptrace_regs;
151 struct freebsd_save87 freebsd_ptrace_fpregs;
152 };
153
154 /* sys/i386/include/exec.h */
155 #define FREEBSD___LDPGSZ 4096
156
157 #ifdef _KERNEL
158 void freebsd_sendsig(sig_t, int, int, u_long, int, union sigval);
159 #endif
160
161 #endif /* _FREEBSD_MACHDEP_H */