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Annotation of XNU/osfmk/mach/shared_memory_server.h, revision 1.1

1.1     ! root        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: kern/shared_memory_server.h
        !            25:  *
        !            26:  *     protos and struct definitions for shared library
        !            27:  *     server and interface
        !            28:  */
        !            29: #ifndef _SHARED_MEMORY_SERVER_H_
        !            30: #define _SHARED_MEMORY_SERVER_H_
        !            31: 
        !            32: #include <mach/vm_prot.h>
        !            33: 
        !            34: #ifdef MACH_KERNEL_PRIVATE
        !            35: 
        !            36: #include <kern/queue.h>
        !            37: #include <vm/vm_object.h>
        !            38: 
        !            39: extern ipc_port_t      shared_text_region_handle;
        !            40: extern ipc_port_t      shared_data_region_handle;
        !            41: #else /* MACH_KERNEL_PRIVATE */
        !            42: 
        !            43: #ifdef KERNEL_PRIVATE
        !            44: extern mach_port_t      shared_text_region_handle;
        !            45: extern mach_port_t      shared_data_region_handle;
        !            46: #endif
        !            47: #endif /* MACH_KERNEL_PRIVATE*/
        !            48: 
        !            49: #ifdef KERNEL_PRIVATE
        !            50: extern vm_offset_t     shared_file_mapping_array;
        !            51: #endif
        !            52: 
        !            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: 
        !            62: /* OUT */
        !            63: #define SF_PREV_LOADED    0x1
        !            64: 
        !            65: 
        !            66: #define load_file_hash(file_object, size) \
        !            67:                ((((natural_t)file_object) & 0xffffff) % size)
        !            68: 
        !            69: #define VM_PROT_COW  0x8  /* must not interfere with normal prot assignments */
        !            70: 
        !            71: struct sf_mapping {
        !            72:        vm_offset_t     mapping_offset;
        !            73:        vm_size_t       size;
        !            74:        vm_offset_t     file_offset;
        !            75:        vm_prot_t       protection;  /* read/write/execute/COW */
        !            76:        
        !            77:        struct sf_mapping *next;
        !            78: };
        !            79: 
        !            80: typedef struct sf_mapping sf_mapping_t;
        !            81: 
        !            82: #ifdef MACH_KERNEL_PRIVATE
        !            83: 
        !            84: struct load_struct {
        !            85:        queue_chain_t   links;  
        !            86:        int             file_object;
        !            87:        vm_offset_t     base_address;
        !            88:        int             mapping_cnt;
        !            89:        sf_mapping_t    *mappings;
        !            90: };
        !            91: 
        !            92: #endif /* MACH_KERNEL_PRIVATE */
        !            93: 
        !            94: typedef struct load_struct load_struct_t;
        !            95: typedef struct load_struct *load_struct_ptr_t;
        !            96: 
        !            97: #ifdef MACH_KERNEL_PRIVATE
        !            98: 
        !            99: struct load_file_ele {
        !           100:        union {
        !           101:                sf_mapping_t    mapping;
        !           102:                load_struct_t   element;
        !           103:        } u;
        !           104: };
        !           105: 
        !           106: struct shared_file_info {
        !           107:        mutex_t         lock;   /* lock for the structure */
        !           108:        queue_head_t    *hash;  /* for later perf enhance */
        !           109:        int             hash_size;
        !           110:        boolean_t       hash_init;
        !           111: };
        !           112: 
        !           113: typedef struct shared_file_info shared_file_info_t;
        !           114: 
        !           115: extern kern_return_t                                   
        !           116: copyin_shared_file(
        !           117:         vm_offset_t     mapped_file,
        !           118:         vm_size_t       mapped_file_size,
        !           119:         vm_offset_t     *base_address,
        !           120:         int             map_cnt,
        !           121:         sf_mapping_t    *mappings,
        !           122:         vm_object_t     file_object,
        !           123:         int             *flags);
        !           124: 
        !           125: extern kern_return_t           
        !           126: shared_file_init(               
        !           127:         ipc_port_t      *shared_text_region_handle,
        !           128:         vm_size_t       text_region_size,
        !           129:         ipc_port_t      *shared_data_region_handle,
        !           130:         vm_size_t       data_region_size, 
        !           131:         vm_offset_t     *shared_file_mapping_array);
        !           132: 
        !           133: extern load_struct_t  *
        !           134: lsf_hash_lookup(   
        !           135:         queue_head_t    *hash_table,
        !           136:         void           *file_object,  
        !           137:         int            size,
        !           138:        boolean_t       alternate);
        !           139: 
        !           140: extern load_struct_t *
        !           141: lsf_hash_delete(
        !           142:         void            *file_object);
        !           143: 
        !           144: extern void    
        !           145: lsf_hash_insert(
        !           146:         load_struct_t   *entry);
        !           147: 
        !           148: extern kern_return_t                   
        !           149: lsf_load(
        !           150:         vm_offset_t     mapped_file,
        !           151:         vm_size_t       mapped_file_size,
        !           152:         vm_offset_t     *base_address,
        !           153:         sf_mapping_t    *mappings,
        !           154:         int             map_cnt,
        !           155:         void            *file_object,
        !           156:         int             flags);
        !           157: 
        !           158: extern void
        !           159: lsf_unload(
        !           160:         void     *file_object);
        !           161: 
        !           162: #endif /* MACH_KERNEL_PRIVATE */
        !           163: #endif /* _SHARED_MEMORY_SERVER_H_ */

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