15b9bcb121
is an application space macro and the applications are supposed to be free to use it as they please (but cannot). This is consistant with the other BSD's who made this change quite some time ago. More commits to come.
92 lines
3.6 KiB
C
92 lines
3.6 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)tss.h 5.4 (Berkeley) 1/18/91
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* $FreeBSD$
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*/
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#ifndef _MACHINE_TSS_H_
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#define _MACHINE_TSS_H_ 1
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#include <machine/globals.h>
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/*
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* Intel 386 Context Data Type
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*/
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struct i386tss {
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int tss_link; /* actually 16 bits: top 16 bits must be zero */
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int tss_esp0; /* kernel stack pointer privilege level 0 */
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#define tss_ksp tss_esp0
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int tss_ss0; /* actually 16 bits: top 16 bits must be zero */
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int tss_esp1; /* kernel stack pointer privilege level 1 */
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int tss_ss1; /* actually 16 bits: top 16 bits must be zero */
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int tss_esp2; /* kernel stack pointer privilege level 2 */
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int tss_ss2; /* actually 16 bits: top 16 bits must be zero */
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int tss_cr3; /* page table directory */
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#define tss_ptd tss_cr3
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int tss_eip; /* program counter */
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#define tss_pc tss_eip
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int tss_eflags; /* program status longword */
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#define tss_psl tss_eflags
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int tss_eax;
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int tss_ecx;
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int tss_edx;
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int tss_ebx;
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int tss_esp; /* user stack pointer */
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#define tss_usp tss_esp
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int tss_ebp; /* user frame pointer */
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#define tss_fp tss_ebp
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int tss_esi;
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int tss_edi;
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int tss_es; /* actually 16 bits: top 16 bits must be zero */
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int tss_cs; /* actually 16 bits: top 16 bits must be zero */
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int tss_ss; /* actually 16 bits: top 16 bits must be zero */
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int tss_ds; /* actually 16 bits: top 16 bits must be zero */
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int tss_fs; /* actually 16 bits: top 16 bits must be zero */
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int tss_gs; /* actually 16 bits: top 16 bits must be zero */
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int tss_ldt; /* actually 16 bits: top 16 bits must be zero */
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int tss_ioopt; /* options & io offset bitmap: currently zero */
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/* XXX unimplemented .. i/o permission bitmap */
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};
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#ifdef _KERNEL
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#ifndef common_tss
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extern struct i386tss common_tss;
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#endif
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#endif
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#endif /* _MACHINE_TSS_H_ */
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