FreeBSD/Linux Kernel Cross Reference
sys/i386/include/reg.h
1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * from: @(#)reg.h 5.5 (Berkeley) 1/18/91
33 * $FreeBSD$
34 */
35
36 #ifndef _MACHINE_REG_H_
37 #define _MACHINE_REG_H_
38
39 /*
40 * Indices for registers in `struct trapframe' and `struct regs'.
41 *
42 * This interface is deprecated. In the kernel, it is only used in FPU
43 * emulators to convert from register numbers encoded in instructions to
44 * register values. Everything else just accesses the relevant struct
45 * members. In userland, debuggers tend to abuse this interface since
46 * they don't understand that `struct regs' is a struct. I hope they have
47 * stopped accessing the registers in the trap frame via PT_{READ,WRITE}_U
48 * and we can stop supporting the user area soon.
49 */
50 #define tFS (0)
51 #define tES (1)
52 #define tDS (2)
53 #define tEDI (3)
54 #define tESI (4)
55 #define tEBP (5)
56 #define tISP (6)
57 #define tEBX (7)
58 #define tEDX (8)
59 #define tECX (9)
60 #define tEAX (10)
61 #define tERR (12)
62 #define tEIP (13)
63 #define tCS (14)
64 #define tEFLAGS (15)
65 #define tESP (16)
66 #define tSS (17)
67
68 /*
69 * Indices for registers in `struct regs' only.
70 *
71 * Some registers live in the pcb and are only in an "array" with the
72 * other registers in application interfaces that copy all the registers
73 * to or from a `struct regs'.
74 */
75 #define tGS (18)
76
77 /*
78 * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
79 */
80 struct reg {
81 unsigned int r_fs;
82 unsigned int r_es;
83 unsigned int r_ds;
84 unsigned int r_edi;
85 unsigned int r_esi;
86 unsigned int r_ebp;
87 unsigned int r_isp;
88 unsigned int r_ebx;
89 unsigned int r_edx;
90 unsigned int r_ecx;
91 unsigned int r_eax;
92 unsigned int r_trapno;
93 unsigned int r_err;
94 unsigned int r_eip;
95 unsigned int r_cs;
96 unsigned int r_eflags;
97 unsigned int r_esp;
98 unsigned int r_ss;
99 unsigned int r_gs;
100 };
101
102 /*
103 * Register set accessible via /proc/$pid/fpregs.
104 */
105 struct fpreg {
106 /*
107 * XXX should get struct from npx.h. Here we give a slightly
108 * simplified struct. This may be too much detail. Perhaps
109 * an array of unsigned longs is best.
110 */
111 unsigned long fpr_env[7];
112 unsigned char fpr_acc[8][10];
113 unsigned long fpr_ex_sw;
114 unsigned char fpr_pad[64];
115 };
116
117 /*
118 * Register set accessible via /proc/$pid/dbregs.
119 */
120 struct dbreg {
121 unsigned int dr[8]; /* debug registers */
122 /* Index 0-3: debug address registers */
123 /* Index 4-5: reserved */
124 /* Index 6: debug status */
125 /* Index 7: debug control */
126 };
127
128 #define DBREG_DR7_EXEC 0x00 /* break on execute */
129 #define DBREG_DR7_WRONLY 0x01 /* break on write */
130 #define DBREG_DR7_RDWR 0x03 /* break on read or write */
131 #define DBREG_DRX(d,x) ((d)->dr[(x)]) /* reference dr0 - dr7 by
132 register number */
133
134
135 #ifdef _KERNEL
136 /*
137 * XXX these interfaces are MI, so they should be declared in a MI place.
138 */
139 int fill_regs(struct thread *, struct reg *);
140 int set_regs(struct thread *, struct reg *);
141 int fill_fpregs(struct thread *, struct fpreg *);
142 int set_fpregs(struct thread *, struct fpreg *);
143 int fill_dbregs(struct thread *, struct dbreg *);
144 int set_dbregs(struct thread *, struct dbreg *);
145 #endif
146
147 #endif /* !_MACHINE_REG_H_ */
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