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1 // Copyright (c) 2006-2010 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Defines InterceptionManager, the class in charge of setting up interceptions | |
6 // for the sandboxed process. For more details see: | |
7 // http://dev.chromium.org/developers/design-documents/sandbox . | |
8 | |
9 #ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
10 #define SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
11 | |
12 #include <stddef.h> | |
13 | |
14 #include "sandbox/win/src/sandbox_types.h" | |
15 | |
16 namespace sandbox { | |
17 | |
18 const int kMaxThunkDataBytes = 64; | |
19 | |
20 enum InterceptorId; | |
21 | |
22 // The following structures contain variable size fields at the end, and will be | |
23 // used to transfer information between two processes. In order to guarantee | |
24 // our ability to follow the chain of structures, the alignment should be fixed, | |
25 // hence this pragma. | |
26 #pragma pack(push, 4) | |
27 | |
28 // Structures for the shared memory that contains patching information | |
29 // for the InterceptionAgent. | |
30 // A single interception: | |
31 struct FunctionInfo { | |
32 size_t record_bytes; // rounded to sizeof(size_t) bytes | |
33 InterceptionType type; | |
34 InterceptorId id; | |
35 const void* interceptor_address; | |
36 char function[1]; // placeholder for null terminated name | |
37 // char interceptor[] // followed by the interceptor function | |
38 }; | |
39 | |
40 // A single dll: | |
41 struct DllPatchInfo { | |
42 size_t record_bytes; // rounded to sizeof(size_t) bytes | |
43 size_t offset_to_functions; | |
44 int num_functions; | |
45 bool unload_module; | |
46 wchar_t dll_name[1]; // placeholder for null terminated name | |
47 // FunctionInfo function_info[] // followed by the functions to intercept | |
48 }; | |
49 | |
50 // All interceptions: | |
51 struct SharedMemory { | |
52 int num_intercepted_dlls; | |
53 void* interceptor_base; | |
54 DllPatchInfo dll_list[1]; // placeholder for the list of dlls | |
55 }; | |
56 | |
57 // Dummy single thunk: | |
58 struct ThunkData { | |
59 char data[kMaxThunkDataBytes]; | |
60 }; | |
61 | |
62 // In-memory representation of the interceptions for a given dll: | |
63 struct DllInterceptionData { | |
64 size_t data_bytes; | |
65 size_t used_bytes; | |
66 void* base; | |
67 int num_thunks; | |
68 #if defined(_WIN64) | |
69 int dummy; // Improve alignment. | |
70 #endif | |
71 ThunkData thunks[1]; | |
72 }; | |
73 | |
74 #pragma pack(pop) | |
75 | |
76 } // namespace sandbox | |
77 | |
78 #endif // SANDBOX_SRC_INTERCEPTION_INTERNAL_H_ | |
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