| /* |
| * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. |
| * |
| * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| * |
| * This file contains Original Code and/or Modifications of Original Code |
| * as defined in and that are subject to the Apple Public Source License |
| * Version 2.0 (the 'License'). You may not use this file except in |
| * compliance with the License. The rights granted to you under the License |
| * may not be used to create, or enable the creation or redistribution of, |
| * unlawful or unlicensed copies of an Apple operating system, or to |
| * circumvent, violate, or enable the circumvention or violation of, any |
| * terms of an Apple operating system software license agreement. |
| * |
| * Please obtain a copy of the License at |
| * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| * |
| * The Original Code and all software distributed under the License are |
| * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| * Please see the License for the specific language governing rights and |
| * limitations under the License. |
| * |
| * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| */ |
| /* |
| * @OSF_COPYRIGHT@ |
| */ |
| /* |
| * Mach Operating System |
| * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University |
| * All Rights Reserved. |
| * |
| * Permission to use, copy, modify and distribute this software and its |
| * documentation is hereby granted, provided that both the copyright |
| * notice and this permission notice appear in all copies of the |
| * software, derivative works or modified versions, and any portions |
| * thereof, and that both notices appear in supporting documentation. |
| * |
| * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" |
| * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR |
| * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
| * |
| * Carnegie Mellon requests users of this software to return to |
| * |
| * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
| * School of Computer Science |
| * Carnegie Mellon University |
| * Pittsburgh PA 15213-3890 |
| * |
| * any improvements or extensions that they make and grant Carnegie Mellon |
| * the rights to redistribute these changes. |
| */ |
| /* |
| */ |
| /* |
| * File: mach/vm_prot.h |
| * Author: Avadis Tevanian, Jr., Michael Wayne Young |
| * |
| * Virtual memory protection definitions. |
| * |
| */ |
| |
| #ifndef _MACH_VM_PROT_H_ |
| #define _MACH_VM_PROT_H_ |
| |
| /* |
| * Types defined: |
| * |
| * vm_prot_t VM protection values. |
| */ |
| |
| typedef int vm_prot_t; |
| |
| /* |
| * Protection values, defined as bits within the vm_prot_t type |
| */ |
| |
| #define VM_PROT_NONE ((vm_prot_t) 0x00) |
| |
| #define VM_PROT_READ ((vm_prot_t) 0x01) /* read permission */ |
| #define VM_PROT_WRITE ((vm_prot_t) 0x02) /* write permission */ |
| #define VM_PROT_EXECUTE ((vm_prot_t) 0x04) /* execute permission */ |
| |
| /* |
| * The default protection for newly-created virtual memory |
| */ |
| |
| #define VM_PROT_DEFAULT (VM_PROT_READ|VM_PROT_WRITE) |
| |
| /* |
| * The maximum privileges possible, for parameter checking. |
| */ |
| |
| #define VM_PROT_ALL (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) |
| |
| /* |
| * An invalid protection value. |
| * Used only by memory_object_lock_request to indicate no change |
| * to page locks. Using -1 here is a bad idea because it |
| * looks like VM_PROT_ALL and then some. |
| */ |
| |
| #define VM_PROT_NO_CHANGE ((vm_prot_t) 0x08) |
| |
| /* |
| * When a caller finds that he cannot obtain write permission on a |
| * mapped entry, the following flag can be used. The entry will |
| * be made "needs copy" effectively copying the object (using COW), |
| * and write permission will be added to the maximum protections |
| * for the associated entry. |
| */ |
| |
| #define VM_PROT_COPY ((vm_prot_t) 0x10) |
| |
| |
| /* |
| * Another invalid protection value. |
| * Used only by memory_object_data_request upon an object |
| * which has specified a copy_call copy strategy. It is used |
| * when the kernel wants a page belonging to a copy of the |
| * object, and is only asking the object as a result of |
| * following a shadow chain. This solves the race between pages |
| * being pushed up by the memory manager and the kernel |
| * walking down the shadow chain. |
| */ |
| |
| #define VM_PROT_WANTS_COPY ((vm_prot_t) 0x10) |
| |
| |
| /* |
| * Another invalid protection value. |
| * Indicates that the other protection bits are to be applied as a mask |
| * against the actual protection bits of the map entry. |
| */ |
| #define VM_PROT_IS_MASK ((vm_prot_t) 0x40) |
| |
| #endif /* _MACH_VM_PROT_H_ */ |
