1 /* $OpenBSD: tss.h,v 1.7 2006/04/27 15:37:53 mickey Exp $ */
2 /* $NetBSD: tss.h,v 1.6 1995/10/11 04:20:28 mycroft Exp $ */
3
4 /*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * 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 * @(#)tss.h 5.4 (Berkeley) 1/18/91
36 */
37
38 #ifndef _I386_TSS_H_
39 #define _I386_TSS_H_
40
41 /*
42 * Intel 386 Context Data Type
43 */
44
45 struct i386tss {
46 int __tss_link;
47 int tss_esp0; /* kernel stack pointer at privilege level 0 */
48 int tss_ss0; /* kernel stack segment at privilege level 0 */
49 int __tss_esp1;
50 int __tss_ss1;
51 int __tss_esp2;
52 int __tss_ss2;
53 int tss_cr3; /* page directory [pointer] paddr */
54 int __tss_eip;
55 int __tss_eflags;
56 int __tss_eax;
57 int __tss_ecx;
58 int __tss_edx;
59 int __tss_ebx;
60 int tss_esp; /* saved stack pointer */
61 int tss_ebp; /* saved frame pointer */
62 int __tss_esi;
63 int __tss_edi;
64 int __tss_es;
65 int tss_cs;
66 int __tss_ss;
67 int __tss_ds;
68 int tss_fs; /* saved segment register */
69 int tss_gs; /* saved segment register */
70 int tss_ldt; /* LDT selector */
71 int tss_ioopt; /* options and I/O permission map offset */
72 };
73
74 #endif /* _I386_TSS_H_ */