72805df917
Map kernel stacks only at unique addresses. Use one TSS per process. Add sysarch calls for modifying IOPL and the I/O permission bitmap. Add a compacting GDT entry allocator, for TSS and LDT selectors. Enable modifying %fs and %gs with PT_SETREGS. Sanitize various bits of code.
73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/* $NetBSD: tss.h,v 1.6 1995/10/11 04:20:28 mycroft 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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
|
|
*/
|
|
|
|
/*
|
|
* 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_ioopt; /* options and I/O permission map offset */
|
|
};
|