reg.h revision 4 
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 *	@(#)reg.h	5.5 (Berkeley) 1/18/91
37 */
38
39/*
40 * Location of the users' stored
41 * registers within appropriate frame of 'trap' and 'syscall', relative to
42 * base of stack frame.
43 * Normal usage is u.u_ar0[XX] in kernel.
44 */
45
46/* When referenced during a trap/exception, registers are at these offsets */
47
48#define	tES	(0)
49#define	tDS	(1)
50#define	tEDI	(2)
51#define	tESI	(3)
52#define	tEBP	(4)
53
54#define	tEBX	(6)
55#define	tEDX	(7)
56#define	tECX	(8)
57#define	tEAX	(9)
58
59#define	tEIP	(12)
60#define	tCS	(13)
61#define	tEFLAGS	(14)
62#define	tESP	(15)
63#define	tSS	(16)
64
65/* During a system call, registers are at these offsets instead of above. */
66
67#define	sEDI	(0)
68#define	sESI	(1)
69#define	sEBP	(2)
70
71#define	sEBX	(4)
72#define	sEDX	(5)
73#define	sECX	(6)
74#define	sEAX	(7)
75#define	sEFLAGS	(8)
76#define	sEIP	(9)
77#define	sCS	(10)
78#define	sESP	(11)
79#define	sSS	(12)
80
81#define	PC	sEIP
82#define	SP	sESP
83#define	PS	sEFLAGS
84#define	R0	sEDX
85#define	R1	sECX
86/*
87 * Registers accessible to ptrace(2) syscall for debugger
88 */
89#ifdef IPCREG
90#define	NIPCREG 14
91int ipcreg[NIPCREG] =
92  { tES,tDS,tEDI,tESI,tEBP,tEBX,tEDX,tECX,tEAX,tEIP,tCS,tEFLAGS,tESP,tSS };
93#endif
94