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Annotation of XNU/osfmk/i386/tss.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * @OSF_COPYRIGHT@
        !            24:  */
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: /*
        !            51:  */
        !            52: 
        !            53: #ifndef        _I386_TSS_H_
        !            54: #define        _I386_TSS_H_
        !            55: 
        !            56: /*
        !            57:  *     i386 Task State Segment
        !            58:  */
        !            59: struct i386_tss {
        !            60:        int             back_link;      /* segment number of previous task,
        !            61:                                           if nested */
        !            62:        int             esp0;           /* initial stack pointer ... */
        !            63:        int             ss0;            /* and segment for ring 0 */
        !            64:        int             esp1;           /* initial stack pointer ... */
        !            65:        int             ss1;            /* and segment for ring 1 */
        !            66:        int             esp2;           /* initial stack pointer ... */
        !            67:        int             ss2;            /* and segment for ring 2 */
        !            68:        int             cr3;            /* CR3 - page table directory
        !            69:                                                 physical address */
        !            70:        int             eip;
        !            71:        int             eflags;
        !            72:        int             eax;
        !            73:        int             ecx;
        !            74:        int             edx;
        !            75:        int             ebx;
        !            76:        int             esp;            /* current stack pointer */
        !            77:        int             ebp;
        !            78:        int             esi;
        !            79:        int             edi;
        !            80:        int             es;
        !            81:        int             cs;
        !            82:        int             ss;             /* current stack segment */
        !            83:        int             ds;
        !            84:        int             fs;
        !            85:        int             gs;
        !            86:        int             ldt;            /* local descriptor table segment */
        !            87:        unsigned short  trace_trap;     /* trap on switch to this task */
        !            88:        unsigned short  io_bit_map_offset;
        !            89:                                        /* offset to start of IO permission
        !            90:                                           bit map */
        !            91: };
        !            92: 
        !            93: #endif /* _I386_TSS_H_ */

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