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Annotation of Net2/arch/i386/include/tss.h, revision 1.1

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 */
        !            52:        /* struct  ptd *tss_cr3;        /* page table directory */
        !            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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