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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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