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1 // Copyright (c) 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 #ifndef SANDBOX_SRC_SIDESTEP_RESOLVER_H__ | |
6 #define SANDBOX_SRC_SIDESTEP_RESOLVER_H__ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include "base/macros.h" | |
11 #include "sandbox/win/src/nt_internals.h" | |
12 #include "sandbox/win/src/resolver.h" | |
13 | |
14 namespace sandbox { | |
15 | |
16 // This is the concrete resolver used to perform sidestep interceptions. | |
17 class SidestepResolverThunk : public ResolverThunk { | |
18 public: | |
19 SidestepResolverThunk() {} | |
20 ~SidestepResolverThunk() override {} | |
21 | |
22 // Implementation of Resolver::Setup. | |
23 NTSTATUS Setup(const void* target_module, | |
24 const void* interceptor_module, | |
25 const char* target_name, | |
26 const char* interceptor_name, | |
27 const void* interceptor_entry_point, | |
28 void* thunk_storage, | |
29 size_t storage_bytes, | |
30 size_t* storage_used) override; | |
31 | |
32 // Implementation of Resolver::GetThunkSize. | |
33 size_t GetThunkSize() const override; | |
34 | |
35 private: | |
36 DISALLOW_COPY_AND_ASSIGN(SidestepResolverThunk); | |
37 }; | |
38 | |
39 // This is the concrete resolver used to perform smart sidestep interceptions. | |
40 // This means basically a sidestep interception that skips the interceptor when | |
41 // the caller resides on the same dll being intercepted. It is intended as | |
42 // a helper only, because that determination is not infallible. | |
43 class SmartSidestepResolverThunk : public SidestepResolverThunk { | |
44 public: | |
45 SmartSidestepResolverThunk() {} | |
46 ~SmartSidestepResolverThunk() override {} | |
47 | |
48 // Implementation of Resolver::Setup. | |
49 NTSTATUS Setup(const void* target_module, | |
50 const void* interceptor_module, | |
51 const char* target_name, | |
52 const char* interceptor_name, | |
53 const void* interceptor_entry_point, | |
54 void* thunk_storage, | |
55 size_t storage_bytes, | |
56 size_t* storage_used) override; | |
57 | |
58 // Implementation of Resolver::GetThunkSize. | |
59 size_t GetThunkSize() const override; | |
60 | |
61 private: | |
62 // Performs the actual call to the interceptor if the conditions are correct | |
63 // (as determined by IsInternalCall). | |
64 static void SmartStub(); | |
65 | |
66 // Returns true if return_address is inside the module loaded at base. | |
67 static bool IsInternalCall(const void* base, void* return_address); | |
68 | |
69 DISALLOW_COPY_AND_ASSIGN(SmartSidestepResolverThunk); | |
70 }; | |
71 | |
72 } // namespace sandbox | |
73 | |
74 | |
75 #endif // SANDBOX_SRC_SIDESTEP_RESOLVER_H__ | |
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