osfmk/mach/shared_memory_server.h

   1 /*
   2  * Copyright (c) 2000-2005 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  *
  30  *      File: mach/shared_memory_server.h
  31  *
  32  *      protos and struct definitions for shared library
  33  *      server and interface
  34  */
  35 #ifndef _MACH_SHARED_MEMORY_SERVER_H_
  36 #define _MACH_SHARED_MEMORY_SERVER_H_
  37
  38 #include <sys/cdefs.h>
  39 #include <mach/vm_prot.h>
  40 #include <mach/vm_types.h>
  41 #include <mach/mach_types.h>
  42
  43 #define VM_PROT_COW  0x8  /* must not interfere with normal prot assignments */
  44 #define VM_PROT_ZF  0x10  /* must not interfere with normal prot assignments */
  45
  46
  47 #if !defined(__LP64__)
  48
  49 #define SHARED_LIBRARY_SERVER_SUPPORTED
  50 #define GLOBAL_SHARED_TEXT_SEGMENT      0x90000000
  51 #define GLOBAL_SHARED_DATA_SEGMENT      0xA0000000
  52 #define GLOBAL_SHARED_SEGMENT_MASK      0xF0000000
  53
  54 #define SHARED_TEXT_REGION_SIZE         0x10000000
  55 #define SHARED_DATA_REGION_SIZE         0x10000000
  56 #define SHARED_ALTERNATE_LOAD_BASE      0x09000000
  57
  58 /*
  59  *  Note: the two masks below are useful because the assumption is
  60  *  made that these shared regions will always be mapped on natural boundaries
  61  *  i.e. if the size is 0x10000000 the object can be mapped at
  62  *  0x20000000, or 0x30000000, but not 0x1000000
  63  */
  64 #define SHARED_TEXT_REGION_MASK         0x0FFFFFFF
  65 #define SHARED_DATA_REGION_MASK         0x0FFFFFFF
  66
  67 #define SHARED_LIB_ALIAS  0x10
  68
  69
  70 /* flags field aliases for copyin_shared_file and load_shared_file */
  71
  72 /* IN */
  73 #define ALTERNATE_LOAD_SITE 0x1
  74 #define NEW_LOCAL_SHARED_REGIONS 0x2
  75 #define QUERY_IS_SYSTEM_REGION 0x4
  76
  77 /* OUT */
  78 #define SF_PREV_LOADED    0x1
  79 #define SYSTEM_REGION_BACKED 0x2
  80
  81
  82 struct sf_mapping {
  83         vm_offset_t     mapping_offset;
  84         vm_size_t       size;
  85         vm_offset_t     file_offset;
  86         vm_prot_t       protection;  /* read/write/execute/COW/ZF */
  87         vm_offset_t     cksum;
  88 };
  89 typedef struct sf_mapping sf_mapping_t;
  90
  91 #ifndef KERNEL
  92 /* load_shared_file and friends is deprecated */
  93 __BEGIN_DECLS
  94 int     load_shared_file(char *, caddr_t, u_long,
  95                 caddr_t *, int, sf_mapping_t *, int *);
  96 int     reset_shared_file(caddr_t *, int, sf_mapping_t *);
  97 int     new_system_shared_regions(void);
  98 __END_DECLS
  99 #endif /* !KERNEL */
 100
 101 #endif  /* !defined(__LP64__) */
 102
 103 /*
 104  * All shared_region_* declarations are a private interface
 105  * between dyld and the kernel.
 106  *
 107  */
 108 struct shared_file_mapping_np {
 109         mach_vm_address_t       sfm_address;
 110         mach_vm_size_t          sfm_size;
 111         mach_vm_offset_t        sfm_file_offset;
 112         vm_prot_t               sfm_max_prot;
 113         vm_prot_t               sfm_init_prot;
 114 };
 115
 116 struct shared_region_range_np {
 117         mach_vm_address_t       srr_address;
 118         mach_vm_size_t          srr_size;
 119 };
 120
 121 #ifndef KERNEL
 122
 123 __BEGIN_DECLS
 124 int     shared_region_map_file_np(int fd,
 125                                   uint32_t mappingCount,
 126                                   const struct shared_file_mapping_np *mappings,
 127                                   int64_t *slide_p);
 128 int     shared_region_make_private_np(uint32_t rangeCount,
 129                                       const struct shared_region_range_np *ranges);
 130 __END_DECLS
 131
 132 #endif /* !KERNEL */
 133
 134 #endif /* _MACH_SHARED_MEMORY_SERVER_H_ */