/* * 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) #endif /* _MACH_VM_PROT_H_ */