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Annotation of Net2/arch/i386/include/tss.h, revision 1.1.1.2

1.1       root        1: /*-
                      2:  * Copyright (c) 1990 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * William Jolitz.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  *
                     36:  *     @(#)tss.h       5.4 (Berkeley) 1/18/91
                     37:  */
                     38: 
                     39: /*
                     40:  * Intel 386 Context Data Type
                     41:  */
                     42: 
                     43: struct i386tss {
                     44:        int     tss_link;       /* actually 16 bits: top 16 bits must be zero */
                     45:        int     tss_esp0;       /* kernel stack pointer priviledge level 0 */
                     46: #define        tss_ksp tss_esp0
                     47:        int     tss_ss0;        /* actually 16 bits: top 16 bits must be zero */
                     48:        int     tss_esp1;       /* kernel stack pointer priviledge level 1 */
                     49:        int     tss_ss1;        /* actually 16 bits: top 16 bits must be zero */
                     50:        int     tss_esp2;       /* kernel stack pointer priviledge level 2 */
                     51:        int     tss_ss2;        /* actually 16 bits: top 16 bits must be zero */
1.1.1.2 ! root       52:        /* struct  ptd *tss_cr3;        ** page table directory */
1.1       root       53:        int     tss_cr3;        /* page table directory */
                     54: #define        tss_ptd tss_cr3
                     55:        int     tss_eip;        /* program counter */
                     56: #define        tss_pc  tss_eip
                     57:        int     tss_eflags;     /* program status longword */
                     58: #define        tss_psl tss_eflags
                     59:        int     tss_eax; 
                     60:        int     tss_ecx; 
                     61:        int     tss_edx; 
                     62:        int     tss_ebx; 
                     63:        int     tss_esp;        /* user stack pointer */
                     64: #define        tss_usp tss_esp
                     65:        int     tss_ebp;        /* user frame pointer */
                     66: #define        tss_fp  tss_ebp
                     67:        int     tss_esi; 
                     68:        int     tss_edi; 
                     69:        int     tss_es;         /* actually 16 bits: top 16 bits must be zero */
                     70:        int     tss_cs;         /* actually 16 bits: top 16 bits must be zero */
                     71:        int     tss_ss;         /* actually 16 bits: top 16 bits must be zero */
                     72:        int     tss_ds;         /* actually 16 bits: top 16 bits must be zero */
                     73:        int     tss_fs;         /* actually 16 bits: top 16 bits must be zero */
                     74:        int     tss_gs;         /* actually 16 bits: top 16 bits must be zero */
                     75:        int     tss_ldt;        /* actually 16 bits: top 16 bits must be zero */
                     76:        int     tss_ioopt;      /* options & io offset bitmap: currently zero */
                     77:                                /* XXX unimplemented .. i/o permission bitmap */
                     78: };

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