osfmk/mach/shared_memory_server.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  *
  24  *      File: mach/shared_memory_server.h
  25  *
  26  *      protos and struct definitions for shared library
  27  *      server and interface
  28  */
  29 #ifndef _MACH_SHARED_MEMORY_SERVER_H_
  30 #define _MACH_SHARED_MEMORY_SERVER_H_
  31
  32 #include <sys/cdefs.h>
  33 #include <mach/vm_prot.h>
  34 #include <mach/vm_types.h>
  35 #include <mach/mach_types.h>
  36
  37 #define VM_PROT_COW  0x8  /* must not interfere with normal prot assignments */
  38 #define VM_PROT_ZF  0x10  /* must not interfere with normal prot assignments */
  39
  40
  41 #if !defined(__LP64__)
  42
  43 #define SHARED_LIBRARY_SERVER_SUPPORTED
  44 #define GLOBAL_SHARED_TEXT_SEGMENT      0x90000000
  45 #define GLOBAL_SHARED_DATA_SEGMENT      0xA0000000
  46 #define GLOBAL_SHARED_SEGMENT_MASK      0xF0000000
  47
  48 #define SHARED_TEXT_REGION_SIZE         0x10000000
  49 #define SHARED_DATA_REGION_SIZE         0x10000000
  50 #define SHARED_ALTERNATE_LOAD_BASE      0x09000000
  51
  52 /*
  53  *  Note: the two masks below are useful because the assumption is
  54  *  made that these shared regions will always be mapped on natural boundaries
  55  *  i.e. if the size is 0x10000000 the object can be mapped at
  56  *  0x20000000, or 0x30000000, but not 0x1000000
  57  */
  58 #define SHARED_TEXT_REGION_MASK         0x0FFFFFFF
  59 #define SHARED_DATA_REGION_MASK         0x0FFFFFFF
  60
  61 #define SHARED_LIB_ALIAS  0x10
  62
  63
  64 /* flags field aliases for copyin_shared_file and load_shared_file */
  65
  66 /* IN */
  67 #define ALTERNATE_LOAD_SITE 0x1
  68 #define NEW_LOCAL_SHARED_REGIONS 0x2
  69 #define QUERY_IS_SYSTEM_REGION 0x4
  70
  71 /* OUT */
  72 #define SF_PREV_LOADED    0x1
  73 #define SYSTEM_REGION_BACKED 0x2
  74
  75
  76 struct sf_mapping {
  77         vm_offset_t     mapping_offset;
  78         vm_size_t       size;
  79         vm_offset_t     file_offset;
  80         vm_prot_t       protection;  /* read/write/execute/COW/ZF */
  81         vm_offset_t     cksum;
  82 };
  83 typedef struct sf_mapping sf_mapping_t;
  84
  85 #ifndef KERNEL
  86 /* load_shared_file and friends is deprecated */
  87 __BEGIN_DECLS
  88 int     load_shared_file(char *, caddr_t, u_long,
  89                 caddr_t *, int, sf_mapping_t *, int *);
  90 int     reset_shared_file(caddr_t *, int, sf_mapping_t *);
  91 int     new_system_shared_regions(void);
  92 __END_DECLS
  93 #endif /* !KERNEL */
  94
  95 #endif  /* !defined(__LP64__) */
  96
  97 /*
  98  * All shared_region_* declarations are a private interface
  99  * between dyld and the kernel.
 100  *
 101  */
 102 struct shared_file_mapping_np {
 103         mach_vm_address_t       sfm_address;
 104         mach_vm_size_t          sfm_size;
 105         mach_vm_offset_t        sfm_file_offset;
 106         vm_prot_t               sfm_max_prot;
 107         vm_prot_t               sfm_init_prot;
 108 };
 109
 110 struct shared_region_range_np {
 111         mach_vm_address_t       srr_address;
 112         mach_vm_size_t          srr_size;
 113 };
 114
 115 #ifndef KERNEL
 116
 117 __BEGIN_DECLS
 118 int     shared_region_map_file_np(int fd,
 119                                   uint32_t mappingCount,
 120                                   const struct shared_file_mapping_np *mappings,
 121                                   int64_t *slide_p);
 122 int     shared_region_make_private_np(uint32_t rangeCount,
 123                                       const struct shared_region_range_np *ranges);
 124 __END_DECLS
 125
 126 #endif /* !KERNEL */
 127
 128 #endif /* _MACH_SHARED_MEMORY_SERVER_H_ */