/* $NetBSD: tss.h,v 1.12 2018/07/07 21:35:16 kamil Exp $ */ /*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tss.h 5.4 (Berkeley) 1/18/91 */ #ifndef _I386_TSS_H_ #define _I386_TSS_H_ /* * Intel 386 Context Data Type */ struct i386tss { int __tss_link; int tss_esp0; /* kernel stack pointer at privilege level 0 */ int tss_ss0; /* kernel stack segment at privilege level 0 */ int __tss_esp1; int __tss_ss1; int __tss_esp2; int __tss_ss2; int tss_cr3; /* page directory paddr */ int __tss_eip; int __tss_eflags; int __tss_eax; int __tss_ecx; int __tss_edx; int __tss_ebx; int tss_esp; /* saved stack pointer */ int tss_ebp; /* saved frame pointer */ int __tss_esi; int __tss_edi; int __tss_es; int __tss_cs; int __tss_ss; int __tss_ds; int tss_fs; /* saved segment register */ int tss_gs; /* saved segment register */ int tss_ldt; /* LDT selector */ int tss_iobase; /* options and I/O permission map offset */ }; /* * I/O bitmap offset beyond TSS's segment limit means no bitmaps. * (i.e. any I/O attempt generates an exception.) */ #define IOMAP_INVALOFF 0xffffu /* * If we have an I/O bitmap, there is only one valid offset. */ #define IOMAP_VALIDOFF sizeof(struct i386tss) #endif /* #ifndef _I386_TSS_H_ */ |