1 /* $NetBSD: tss.h,v 1.6 1995/10/11 04:20:28 mycroft Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)tss.h 5.4 (Berkeley) 1/18/91 39 */ 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 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