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Annotation of XNU/EXTERNAL_HEADERS/architecture/i386/tss.h, revision 1.1.1.1

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:  * Copyright (c) 1992 NeXT Computer, Inc.
                     24:  *
                     25:  * Intel386 Family:    Task State Segment.
                     26:  *
                     27:  * HISTORY
                     28:  *
                     29:  * 29 March 1992 ? at NeXT
                     30:  *     Created.
                     31:  */
                     32: 
                     33: #import <architecture/i386/sel.h>
                     34: 
                     35: /*
                     36:  * Task State segment.
                     37:  */
                     38: 
                     39: typedef struct tss {
                     40:     sel_t              oldtss;
                     41:     unsigned int               :0;
                     42:     unsigned int       esp0;
                     43:     sel_t              ss0;
                     44:     unsigned int               :0;
                     45:     unsigned int       esp1;
                     46:     sel_t              ss1;
                     47:     unsigned int               :0;
                     48:     unsigned int       esp2;
                     49:     sel_t              ss2;
                     50:     unsigned int               :0;
                     51:     unsigned int       cr3;
                     52:     unsigned int       eip;
                     53:     unsigned int       eflags;
                     54:     unsigned int       eax;
                     55:     unsigned int       ecx;
                     56:     unsigned int       edx;
                     57:     unsigned int       ebx;
                     58:     unsigned int       esp;
                     59:     unsigned int       ebp;
                     60:     unsigned int       esi;
                     61:     unsigned int       edi;
                     62:     sel_t              es;
                     63:     unsigned int               :0;
                     64:     sel_t              cs;
                     65:     unsigned int               :0;
                     66:     sel_t              ss;
                     67:     unsigned int               :0;
                     68:     sel_t              ds;
                     69:     unsigned int               :0;
                     70:     sel_t              fs;
                     71:     unsigned int               :0;
                     72:     sel_t              gs;
                     73:     unsigned int               :0;
                     74:     sel_t              ldt;
                     75:     unsigned int               :0;
                     76:     unsigned int       t       :1,
                     77:                                :15,
                     78:                        io_bmap :16;
                     79: } tss_t;
                     80: 
                     81: #define TSS_SIZE(n)    (sizeof (struct tss) + (n))
                     82: 
                     83: /*
                     84:  * Task State segment descriptor.
                     85:  */
                     86: 
                     87: typedef struct tss_desc {
                     88:     unsigned short     limit00;
                     89:     unsigned short     base00;
                     90:     unsigned char      base16;
                     91:     unsigned char      type    :5,
                     92: #define DESC_TSS       0x09
                     93:                        dpl     :2,
                     94:                        present :1;
                     95:     unsigned char      limit16 :4,
                     96:                                :3,
                     97:                        granular:1;
                     98:     unsigned char      base24;
                     99: } tss_desc_t;
                    100: 
                    101: /*
                    102:  * Task gate descriptor.
                    103:  */
                    104:  
                    105: typedef struct task_gate {
                    106:     unsigned short             :16;
                    107:     sel_t              tss;
                    108:     unsigned int               :8,
                    109:                        type    :5,
                    110: #define DESC_TASK_GATE 0x05
                    111:                        dpl     :2,
                    112:                        present :1,
                    113:                                :0;
                    114: } task_gate_t;

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