1 /* $OpenBSD: tss.h,v 1.8 2011/03/23 16:54:35 pirofti 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 _MACHINE_TSS_H_ 39 #define _MACHINE_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 /* _MACHINE_TSS_H_ */ 75