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  * 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 #define SHARED_LIBRARY_SERVER_SUPPORTED
  33 #define GLOBAL_SHARED_TEXT_SEGMENT 0x90000000
  34 #define GLOBAL_SHARED_DATA_SEGMENT 0xA0000000
  35 #define GLOBAL_SHARED_SEGMENT_MASK 0xF0000000
  36
  37 #define         SHARED_TEXT_REGION_SIZE 0x10000000
  38 #define         SHARED_DATA_REGION_SIZE 0x10000000
  39 #define         SHARED_ALTERNATE_LOAD_BASE 0x9000000
  40
  41 /*
  42  *  Note: the two masks below are useful because the assumption is
  43  *  made that these shared regions will always be mapped on natural boundaries
  44  *  i.e. if the size is 0x10000000 the object can be mapped at
  45  *  0x20000000, or 0x30000000, but not 0x1000000
  46  */
  47 #define         SHARED_TEXT_REGION_MASK 0xFFFFFFF
  48 #define         SHARED_DATA_REGION_MASK 0xFFFFFFF
  49
  50
  51 #include <mach/vm_prot.h>
  52 #include <mach/mach_types.h>
  53
  54 #define SHARED_LIB_ALIAS  0x10
  55
  56
  57 /* flags field aliases for copyin_shared_file and load_shared_file */
  58
  59 /* IN */
  60 #define ALTERNATE_LOAD_SITE 0x1
  61 #define NEW_LOCAL_SHARED_REGIONS 0x2
  62 #define QUERY_IS_SYSTEM_REGION 0x4
  63
  64 /* OUT */
  65 #define SF_PREV_LOADED    0x1
  66 #define SYSTEM_REGION_BACKED 0x2
  67
  68
  69 #define load_file_hash(file_object, size) \
  70                 ((((natural_t)file_object) & 0xffffff) % size)
  71
  72 #define VM_PROT_COW  0x8  /* must not interfere with normal prot assignments */
  73 #define VM_PROT_ZF  0x10  /* must not interfere with normal prot assignments */
  74
  75 struct sf_mapping {
  76         vm_offset_t     mapping_offset;
  77         vm_size_t       size;
  78         vm_offset_t     file_offset;
  79         vm_prot_t       protection;  /* read/write/execute/COW/ZF */
  80         vm_offset_t     cksum;
  81 };
  82
  83 typedef struct sf_mapping sf_mapping_t;
  84
  85 #endif /* _MACH_SHARED_MEMORY_SERVER_H_ */