osfmk/mach/shared_memory_server.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  *
  27  *      File: mach/shared_memory_server.h
  28  *
  29  *      protos and struct definitions for shared library
  30  *      server and interface
  31  */
  32 #ifndef _MACH_SHARED_MEMORY_SERVER_H_
  33 #define _MACH_SHARED_MEMORY_SERVER_H_
  34
  35 #define SHARED_LIBRARY_SERVER_SUPPORTED
  36 #define GLOBAL_SHARED_TEXT_SEGMENT 0x90000000
  37 #define GLOBAL_SHARED_DATA_SEGMENT 0xA0000000
  38 #define GLOBAL_SHARED_SEGMENT_MASK 0xF0000000
  39
  40 #define         SHARED_TEXT_REGION_SIZE 0x10000000
  41 #define         SHARED_DATA_REGION_SIZE 0x10000000
  42 #define         SHARED_ALTERNATE_LOAD_BASE 0x9000000
  43
  44 /*
  45  *  Note: the two masks below are useful because the assumption is
  46  *  made that these shared regions will always be mapped on natural boundaries
  47  *  i.e. if the size is 0x10000000 the object can be mapped at
  48  *  0x20000000, or 0x30000000, but not 0x1000000
  49  */
  50 #define         SHARED_TEXT_REGION_MASK 0xFFFFFFF
  51 #define         SHARED_DATA_REGION_MASK 0xFFFFFFF
  52
  53
  54 #include <mach/vm_prot.h>
  55 #include <mach/mach_types.h>
  56
  57 #define SHARED_LIB_ALIAS  0x10
  58
  59
  60 /* flags field aliases for copyin_shared_file and load_shared_file */
  61
  62 /* IN */
  63 #define ALTERNATE_LOAD_SITE 0x1
  64 #define NEW_LOCAL_SHARED_REGIONS 0x2
  65 #define QUERY_IS_SYSTEM_REGION 0x4
  66
  67 /* OUT */
  68 #define SF_PREV_LOADED    0x1
  69 #define SYSTEM_REGION_BACKED 0x2
  70
  71
  72 #define load_file_hash(file_object, size) \
  73                 ((((natural_t)file_object) & 0xffffff) % size)
  74
  75 #define VM_PROT_COW  0x8  /* must not interfere with normal prot assignments */
  76 #define VM_PROT_ZF  0x10  /* must not interfere with normal prot assignments */
  77
  78 struct sf_mapping {
  79         vm_offset_t     mapping_offset;
  80         vm_size_t       size;
  81         vm_offset_t     file_offset;
  82         vm_prot_t       protection;  /* read/write/execute/COW/ZF */
  83         vm_offset_t     cksum;
  84 };
  85
  86 typedef struct sf_mapping sf_mapping_t;
  87
  88 #endif /* _MACH_SHARED_MEMORY_SERVER_H_ */