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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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