reg.h revision 146818 
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: head/sys/i386/include/reg.h 146818 2005-05-31 09:43:04Z dfr $
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/$pid/regs and PT_{SET,GET}REGS.
79 */
80struct reg {
81	unsigned int	r_fs;
82	unsigned int	r_es;
83	unsigned int	r_ds;
84	unsigned int	r_edi;
85	unsigned int	r_esi;
86	unsigned int	r_ebp;
87	unsigned int	r_isp;
88	unsigned int	r_ebx;
89	unsigned int	r_edx;
90	unsigned int	r_ecx;
91	unsigned int	r_eax;
92	unsigned int	r_trapno;
93	unsigned int	r_err;
94	unsigned int	r_eip;
95	unsigned int	r_cs;
96	unsigned int	r_eflags;
97	unsigned int	r_esp;
98	unsigned int	r_ss;
99	unsigned int	r_gs;
100};
101
102/*
103 * Register set accessible via /proc/$pid/fpregs.
104 */
105struct 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
117struct xmmreg {
118	/*
119	 * XXX should get struct from npx.h.  Here we give a slightly
120	 * simplified struct.  This may be too much detail.  Perhaps
121	 * an array of unsigned longs is best.
122	 */
123	unsigned long	xmm_env[8];
124	unsigned char	xmm_acc[8][16];
125	unsigned char	xmm_reg[8][16];
126	unsigned char	xmm_pad[224];
127};
128
129/*
130 * Register set accessible via /proc/$pid/dbregs.
131 */
132struct dbreg {
133	unsigned int  dr[8];	/* debug registers */
134				/* Index 0-3: debug address registers */
135				/* Index 4-5: reserved */
136				/* Index 6: debug status */
137				/* Index 7: debug control */
138};
139
140#define DBREG_DR7_EXEC      0x00      /* break on execute       */
141#define DBREG_DR7_WRONLY    0x01      /* break on write         */
142#define DBREG_DR7_RDWR      0x03      /* break on read or write */
143#define DBREG_DRX(d,x) ((d)->dr[(x)]) /* reference dr0 - dr7 by
144                                         register number */
145
146
147#ifdef _KERNEL
148/*
149 * XXX these interfaces are MI, so they should be declared in a MI place.
150 */
151int	fill_regs(struct thread *, struct reg *);
152int	set_regs(struct thread *, struct reg *);
153int	fill_fpregs(struct thread *, struct fpreg *);
154int	set_fpregs(struct thread *, struct fpreg *);
155int	fill_dbregs(struct thread *, struct dbreg *);
156int	set_dbregs(struct thread *, struct dbreg *);
157#endif
158
159#endif /* !_MACHINE_REG_H_ */
160