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Annotation of kernel/machdep/i386/pc_support/PCtaskInline.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1993 NeXT Computer, Inc.
        !            27:  *
        !            28:  * Inline functions to access the task address space.
        !            29:  *
        !            30:  * HISTORY
        !            31:  *
        !            32:  * 15 Jan 1993 ? at NeXT
        !            33:  *     Created.
        !            34:  */
        !            35: 
        !            36: #if    KERNEL_PRIVATE
        !            37: 
        !            38: #import <mach/mach_types.h>
        !            39: 
        !            40: static __inline__
        !            41: boolean_t
        !            42: fetchByte(
        !            43:     thread_t                   thread,
        !            44:     vm_offset_t                        address,
        !            45:     unsigned char              *data
        !            46: )
        !            47: {    
        !            48:     thread->recover = (vm_offset_t)&&fault;
        !            49: 
        !            50:     asm volatile(
        !            51:        "movb %%fs:%1,%0"
        !            52:                : "=q" (*data)
        !            53:                : "m" (*(unsigned char *)address));
        !            54:                                
        !            55:     thread->recover = 0;
        !            56:     return (TRUE);
        !            57:     
        !            58: fault:
        !            59:     thread->recover = 0;
        !            60:     return (FALSE);
        !            61: }
        !            62: 
        !            63: static __inline__
        !            64: boolean_t
        !            65: fetch2Byte(
        !            66:     thread_t                   thread,
        !            67:     vm_offset_t                        address,
        !            68:     unsigned short             *data
        !            69: )
        !            70: {    
        !            71:     thread->recover = (vm_offset_t)&&fault;
        !            72:     
        !            73:     asm volatile(
        !            74:        "movw %%fs:%1,%0"
        !            75:                : "=q" (*data)
        !            76:                : "m" (*(unsigned short *)address));
        !            77:                
        !            78:     thread->recover = 0;
        !            79:     return (TRUE);
        !            80:     
        !            81: fault:
        !            82:     thread->recover = 0;
        !            83:     return (FALSE);
        !            84: }
        !            85: 
        !            86: static __inline__
        !            87: boolean_t
        !            88: store2Byte(
        !            89:     thread_t                   thread,
        !            90:     vm_offset_t                        address,
        !            91:     unsigned short             data
        !            92: )
        !            93: {
        !            94:     thread->recover = (vm_offset_t)&&fault;
        !            95:     
        !            96:     asm volatile(
        !            97:        "movw %0,%%fs:%1"
        !            98:                :
        !            99:                : "r" (data), "m" (*(unsigned short *)address));
        !           100:                
        !           101:     thread->recover = 0;
        !           102:     return (TRUE);
        !           103:     
        !           104: fault:
        !           105:     thread->recover = 0;
        !           106:     return (FALSE);
        !           107: }
        !           108: 
        !           109: static __inline__
        !           110: boolean_t
        !           111: fetch4Byte(
        !           112:     thread_t                   thread,
        !           113:     vm_offset_t                        address,
        !           114:     unsigned long              *data
        !           115: )
        !           116: {    
        !           117:     thread->recover = (vm_offset_t)&&fault;
        !           118:     
        !           119:     asm volatile(
        !           120:        "movl %%fs:%1,%0"
        !           121:                : "=r" (*data)
        !           122:                : "m" (*(unsigned long *)address));
        !           123:                
        !           124:     thread->recover = 0;
        !           125:     return (TRUE);
        !           126:     
        !           127: fault:
        !           128:     thread->recover = 0;
        !           129:     return (FALSE);
        !           130: }
        !           131: 
        !           132: static __inline__
        !           133: boolean_t
        !           134: store4Byte(
        !           135:     thread_t                   thread,
        !           136:     vm_offset_t                        address,
        !           137:     unsigned long              data
        !           138: )
        !           139: {
        !           140:     thread->recover = (vm_offset_t)&&fault;
        !           141:     
        !           142:     asm volatile(
        !           143:        "movl %0,%%fs:%1"
        !           144:                :
        !           145:                : "r" (data), "m" (*(unsigned long *)address));
        !           146:                
        !           147:     thread->recover = 0;
        !           148:     return (TRUE);
        !           149:     
        !           150: fault:
        !           151:     thread->recover = 0;
        !           152:     return (FALSE);
        !           153: }
        !           154: 
        !           155: static __inline__
        !           156: boolean_t
        !           157: fetch8Byte(
        !           158:     thread_t                   thread,
        !           159:     vm_offset_t                        address,
        !           160:     void                       *data
        !           161: )
        !           162: {
        !           163:     thread->recover = (vm_offset_t)&&fault;
        !           164:     
        !           165:     asm volatile(
        !           166:        "movl %%fs:%1,%0"
        !           167:                : "=r" ( *(unsigned long *)data )
        !           168:                : "m" ( *(unsigned long *)address ));
        !           169:     asm volatile(
        !           170:        "movl %%fs:%1,%0"
        !           171:                : "=r" ( *(((unsigned long *)data)+1) )
        !           172:                : "m" ( *(((unsigned long *)address)+1) ));
        !           173:                
        !           174:     thread->recover = 0;
        !           175:     return (TRUE);
        !           176:     
        !           177: fault:
        !           178:     thread->recover = 0;
        !           179:     return (FALSE);
        !           180: }
        !           181: 
        !           182: #endif

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