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