| 1 | /*␊ |
| 2 | * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.␊ |
| 3 | *␊ |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@␊ |
| 5 | * ␊ |
| 6 | * This file contains Original Code and/or Modifications of Original Code␊ |
| 7 | * as defined in and that are subject to the Apple Public Source License␊ |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in␊ |
| 9 | * compliance with the License. The rights granted to you under the License␊ |
| 10 | * may not be used to create, or enable the creation or redistribution of,␊ |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to␊ |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any␊ |
| 13 | * terms of an Apple operating system software license agreement.␊ |
| 14 | * ␊ |
| 15 | * Please obtain a copy of the License at␊ |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file.␊ |
| 17 | * ␊ |
| 18 | * The Original Code and all software distributed under the License are␊ |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.␊ |
| 23 | * Please see the License for the specific language governing rights and␊ |
| 24 | * limitations under the License.␊ |
| 25 | * ␊ |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@␊ |
| 27 | */␊ |
| 28 | /*␊ |
| 29 | * @OSF_COPYRIGHT@␊ |
| 30 | */␊ |
| 31 | /* ␊ |
| 32 | * Mach Operating System␊ |
| 33 | * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University␊ |
| 34 | * All Rights Reserved.␊ |
| 35 | * ␊ |
| 36 | * Permission to use, copy, modify and distribute this software and its␊ |
| 37 | * documentation is hereby granted, provided that both the copyright␊ |
| 38 | * notice and this permission notice appear in all copies of the␊ |
| 39 | * software, derivative works or modified versions, and any portions␊ |
| 40 | * thereof, and that both notices appear in supporting documentation.␊ |
| 41 | * ␊ |
| 42 | * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"␊ |
| 43 | * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR␊ |
| 44 | * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.␊ |
| 45 | * ␊ |
| 46 | * Carnegie Mellon requests users of this software to return to␊ |
| 47 | * ␊ |
| 48 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU␊ |
| 49 | * School of Computer Science␊ |
| 50 | * Carnegie Mellon University␊ |
| 51 | * Pittsburgh PA 15213-3890␊ |
| 52 | * ␊ |
| 53 | * any improvements or extensions that they make and grant Carnegie Mellon␊ |
| 54 | * the rights to redistribute these changes.␊ |
| 55 | */␊ |
| 56 | /*␊ |
| 57 | */␊ |
| 58 | /*␊ |
| 59 | *␉File:␉mach/vm_prot.h␊ |
| 60 | *␉Author:␉Avadis Tevanian, Jr., Michael Wayne Young␊ |
| 61 | *␊ |
| 62 | *␉Virtual memory protection definitions.␊ |
| 63 | *␊ |
| 64 | */␊ |
| 65 | ␊ |
| 66 | #ifndef␉_MACH_VM_PROT_H_␊ |
| 67 | #define␉_MACH_VM_PROT_H_␊ |
| 68 | ␊ |
| 69 | /*␊ |
| 70 | *␉Types defined:␊ |
| 71 | *␊ |
| 72 | *␉vm_prot_t␉␉VM protection values.␊ |
| 73 | */␊ |
| 74 | ␊ |
| 75 | typedef int␉␉vm_prot_t;␊ |
| 76 | ␊ |
| 77 | /*␊ |
| 78 | *␉Protection values, defined as bits within the vm_prot_t type␊ |
| 79 | */␊ |
| 80 | ␊ |
| 81 | #define␉VM_PROT_NONE␉((vm_prot_t) 0x00)␊ |
| 82 | ␊ |
| 83 | #define VM_PROT_READ␉((vm_prot_t) 0x01)␉/* read permission */␊ |
| 84 | #define VM_PROT_WRITE␉((vm_prot_t) 0x02)␉/* write permission */␊ |
| 85 | #define VM_PROT_EXECUTE␉((vm_prot_t) 0x04)␉/* execute permission */␊ |
| 86 | ␊ |
| 87 | /*␊ |
| 88 | *␉The default protection for newly-created virtual memory␊ |
| 89 | */␊ |
| 90 | ␊ |
| 91 | #define VM_PROT_DEFAULT␉(VM_PROT_READ|VM_PROT_WRITE)␊ |
| 92 | ␊ |
| 93 | /*␊ |
| 94 | *␉The maximum privileges possible, for parameter checking.␊ |
| 95 | */␊ |
| 96 | ␊ |
| 97 | #define VM_PROT_ALL␉(VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)␊ |
| 98 | ␊ |
| 99 | /*␊ |
| 100 | *␉An invalid protection value.␊ |
| 101 | *␉Used only by memory_object_lock_request to indicate no change␊ |
| 102 | *␉to page locks. Using -1 here is a bad idea because it␊ |
| 103 | *␉looks like VM_PROT_ALL and then some.␊ |
| 104 | */␊ |
| 105 | ␊ |
| 106 | #define VM_PROT_NO_CHANGE␉((vm_prot_t) 0x08)␊ |
| 107 | ␊ |
| 108 | /* ␊ |
| 109 | * When a caller finds that he cannot obtain write permission on a␊ |
| 110 | * mapped entry, the following flag can be used. The entry will␊ |
| 111 | * be made "needs copy" effectively copying the object (using COW),␊ |
| 112 | * and write permission will be added to the maximum protections␊ |
| 113 | * for the associated entry. ␊ |
| 114 | */ ␊ |
| 115 | ␊ |
| 116 | #define VM_PROT_COPY ((vm_prot_t) 0x10)␊ |
| 117 | ␊ |
| 118 | ␊ |
| 119 | /*␊ |
| 120 | *␉Another invalid protection value.␊ |
| 121 | *␉Used only by memory_object_data_request upon an object␊ |
| 122 | *␉which has specified a copy_call copy strategy. It is used␊ |
| 123 | *␉when the kernel wants a page belonging to a copy of the␊ |
| 124 | *␉object, and is only asking the object as a result of␊ |
| 125 | *␉following a shadow chain. This solves the race between pages␊ |
| 126 | *␉being pushed up by the memory manager and the kernel␊ |
| 127 | *␉walking down the shadow chain.␊ |
| 128 | */␊ |
| 129 | ␊ |
| 130 | #define VM_PROT_WANTS_COPY␉((vm_prot_t) 0x10)␊ |
| 131 | ␊ |
| 132 | ␊ |
| 133 | /*␊ |
| 134 | *␉The caller wants this memory region treated as if it had a valid␊ |
| 135 | *␉code signature.␊ |
| 136 | */␊ |
| 137 | ␊ |
| 138 | #define VM_PROT_TRUSTED␉␉((vm_prot_t) 0x20)␊ |
| 139 | ␊ |
| 140 | ␊ |
| 141 | #endif␉/* _MACH_VM_PROT_H_ */␊ |
| 142 | |
