reg.h revision 92761 
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: @(#)reg.h	5.5 (Berkeley) 1/18/91
37 * $FreeBSD: head/sys/i386/include/reg.h 92761 2002-03-20 05:48:58Z alfred $
38 */
39
40#ifndef _MACHINE_REG_H_
41#define	_MACHINE_REG_H_
42
43/*
44 * Indices for registers in `struct trapframe' and `struct regs'.
45 *
46 * This interface is deprecated.  In the kernel, it is only used in FPU
47 * emulators to convert from register numbers encoded in instructions to
48 * register values.  Everything else just accesses the relevant struct
49 * members.  In userland, debuggers tend to abuse this interface since
50 * they don't understand that `struct regs' is a struct.  I hope they have
51 * stopped accessing the registers in the trap frame via PT_{READ,WRITE}_U
52 * and we can stop supporting the user area soon.
53 */
54#define	tFS	(0)
55#define	tES	(1)
56#define	tDS	(2)
57#define	tEDI	(3)
58#define	tESI	(4)
59#define	tEBP	(5)
60#define	tISP	(6)
61#define	tEBX	(7)
62#define	tEDX	(8)
63#define	tECX	(9)
64#define	tEAX	(10)
65#define	tERR	(12)
66#define	tEIP	(13)
67#define	tCS	(14)
68#define	tEFLAGS	(15)
69#define	tESP	(16)
70#define	tSS	(17)
71
72/*
73 * Indices for registers in `struct regs' only.
74 *
75 * Some registers live in the pcb and are only in an "array" with the
76 * other registers in application interfaces that copy all the registers
77 * to or from a `struct regs'.
78 */
79#define	tGS	(18)
80
81/*
82 * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
83 */
84struct reg {
85	unsigned int	r_fs;
86	unsigned int	r_es;
87	unsigned int	r_ds;
88	unsigned int	r_edi;
89	unsigned int	r_esi;
90	unsigned int	r_ebp;
91	unsigned int	r_isp;
92	unsigned int	r_ebx;
93	unsigned int	r_edx;
94	unsigned int	r_ecx;
95	unsigned int	r_eax;
96	unsigned int	r_trapno;
97	unsigned int	r_err;
98	unsigned int	r_eip;
99	unsigned int	r_cs;
100	unsigned int	r_eflags;
101	unsigned int	r_esp;
102	unsigned int	r_ss;
103	unsigned int	r_gs;
104};
105
106/*
107 * Register set accessible via /proc/$pid/fpregs.
108 */
109struct fpreg {
110	/*
111	 * XXX should get struct from npx.h.  Here we give a slightly
112	 * simplified struct.  This may be too much detail.  Perhaps
113	 * an array of unsigned longs is best.
114	 */
115	unsigned long	fpr_env[7];
116	unsigned char	fpr_acc[8][10];
117	unsigned long	fpr_ex_sw;
118	unsigned char	fpr_pad[64];
119};
120
121/*
122 * Register set accessible via /proc/$pid/dbregs.
123 */
124struct dbreg {
125	unsigned int  dr0;	/* debug address register 0 */
126	unsigned int  dr1;	/* debug address register 1 */
127	unsigned int  dr2;	/* debug address register 2 */
128	unsigned int  dr3;	/* debug address register 3 */
129	unsigned int  dr4;	/* reserved */
130	unsigned int  dr5;	/* reserved */
131	unsigned int  dr6;	/* debug status register */
132	unsigned int  dr7;	/* debug control register */
133};
134
135#define DBREG_DR7_EXEC      0x00      /* break on execute       */
136#define DBREG_DR7_WRONLY    0x01      /* break on write         */
137#define DBREG_DR7_RDWR      0x03      /* break on read or write */
138#define DBREG_DRX(d,x) ((&d->dr0)[x]) /* reference dr0 - dr7 by
139                                         register number */
140
141
142#ifdef _KERNEL
143/*
144 * XXX these interfaces are MI, so they should be declared in a MI place.
145 */
146void	setregs(struct thread *, u_long, u_long, u_long);
147int	fill_regs(struct thread *, struct reg *);
148int	set_regs(struct thread *, struct reg *);
149int	fill_fpregs(struct thread *, struct fpreg *);
150int	set_fpregs(struct thread *, struct fpreg *);
151int	fill_dbregs(struct thread *, struct dbreg *);
152int	set_dbregs(struct thread *, struct dbreg *);
153#endif
154
155#endif /* !_MACHINE_REG_H_ */
156