michael@0: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
michael@0: // Use of this source code is governed by a BSD-style license that can be
michael@0: // found in the LICENSE file.
michael@0: 
michael@0: #ifndef SANDBOX_SRC_SERVICE_RESOLVER_H__
michael@0: #define SANDBOX_SRC_SERVICE_RESOLVER_H__
michael@0: 
michael@0: #include "sandbox/win/src/nt_internals.h"
michael@0: #include "sandbox/win/src/resolver.h"
michael@0: 
michael@0: namespace sandbox {
michael@0: 
michael@0: // This is the concrete resolver used to perform service-call type functions
michael@0: // inside ntdll.dll.
michael@0: class ServiceResolverThunk : public ResolverThunk {
michael@0:  public:
michael@0:   // The service resolver needs a child process to write to.
michael@0:   ServiceResolverThunk(HANDLE process, bool relaxed)
michael@0:       : process_(process), ntdll_base_(NULL), win2k_(false),
michael@0:         relaxed_(relaxed), relative_jump_(0) {}
michael@0:   virtual ~ServiceResolverThunk() {}
michael@0: 
michael@0:   // Implementation of Resolver::Setup.
michael@0:   virtual NTSTATUS Setup(const void* target_module,
michael@0:                          const void* interceptor_module,
michael@0:                          const char* target_name,
michael@0:                          const char* interceptor_name,
michael@0:                          const void* interceptor_entry_point,
michael@0:                          void* thunk_storage,
michael@0:                          size_t storage_bytes,
michael@0:                          size_t* storage_used);
michael@0: 
michael@0:   // Implementation of Resolver::ResolveInterceptor.
michael@0:   virtual NTSTATUS ResolveInterceptor(const void* module,
michael@0:                                       const char* function_name,
michael@0:                                       const void** address);
michael@0: 
michael@0:   // Implementation of Resolver::ResolveTarget.
michael@0:   virtual NTSTATUS ResolveTarget(const void* module,
michael@0:                                  const char* function_name,
michael@0:                                  void** address);
michael@0: 
michael@0:   // Implementation of Resolver::GetThunkSize.
michael@0:   virtual size_t GetThunkSize() const;
michael@0: 
michael@0:  protected:
michael@0:   // The unit test will use this member to allow local patch on a buffer.
michael@0:   HMODULE ntdll_base_;
michael@0: 
michael@0:   // Handle of the child process.
michael@0:   HANDLE process_;
michael@0: 
michael@0:  protected:
michael@0:   // Keeps track of a Windows 2000 resolver.
michael@0:   bool win2k_;
michael@0: 
michael@0:  private:
michael@0:   // Returns true if the code pointer by target_ corresponds to the expected
michael@0:   // type of function. Saves that code on the first part of the thunk pointed
michael@0:   // by local_thunk (should be directly accessible from the parent).
michael@0:   virtual bool IsFunctionAService(void* local_thunk) const;
michael@0: 
michael@0:   // Performs the actual patch of target_.
michael@0:   // local_thunk must be already fully initialized, and the first part must
michael@0:   // contain the original code. The real type of this buffer is ServiceFullThunk
michael@0:   // (yes, private). remote_thunk (real type ServiceFullThunk), must be
michael@0:   // allocated on the child, and will contain the thunk data, after this call.
michael@0:   // Returns the apropriate status code.
michael@0:   virtual NTSTATUS PerformPatch(void* local_thunk, void* remote_thunk);
michael@0: 
michael@0:   // Provides basically the same functionality as IsFunctionAService but it
michael@0:   // continues even if it does not recognize the function code. remote_thunk
michael@0:   // is the address of our memory on the child.
michael@0:   bool SaveOriginalFunction(void* local_thunk, void* remote_thunk);
michael@0: 
michael@0:   // true if we are allowed to patch already-patched functions.
michael@0:   bool relaxed_;
michael@0:   ULONG relative_jump_;
michael@0: 
michael@0:   DISALLOW_COPY_AND_ASSIGN(ServiceResolverThunk);
michael@0: };
michael@0: 
michael@0: // This is the concrete resolver used to perform service-call type functions
michael@0: // inside ntdll.dll on WOW64 (32 bit ntdll on 64 bit Vista).
michael@0: class Wow64ResolverThunk : public ServiceResolverThunk {
michael@0:  public:
michael@0:   // The service resolver needs a child process to write to.
michael@0:   Wow64ResolverThunk(HANDLE process, bool relaxed)
michael@0:       : ServiceResolverThunk(process, relaxed) {}
michael@0:   virtual ~Wow64ResolverThunk() {}
michael@0: 
michael@0:  private:
michael@0:   virtual bool IsFunctionAService(void* local_thunk) const;
michael@0: 
michael@0:   DISALLOW_COPY_AND_ASSIGN(Wow64ResolverThunk);
michael@0: };
michael@0: 
michael@0: // This is the concrete resolver used to perform service-call type functions
michael@0: // inside ntdll.dll on WOW64 for Windows 8.
michael@0: class Wow64W8ResolverThunk : public ServiceResolverThunk {
michael@0:  public:
michael@0:   // The service resolver needs a child process to write to.
michael@0:   Wow64W8ResolverThunk(HANDLE process, bool relaxed)
michael@0:       : ServiceResolverThunk(process, relaxed) {}
michael@0:   virtual ~Wow64W8ResolverThunk() {}
michael@0: 
michael@0:  private:
michael@0:   virtual bool IsFunctionAService(void* local_thunk) const;
michael@0: 
michael@0:   DISALLOW_COPY_AND_ASSIGN(Wow64W8ResolverThunk);
michael@0: };
michael@0: 
michael@0: // This is the concrete resolver used to perform service-call type functions
michael@0: // inside ntdll.dll on Windows 2000 and XP pre SP2.
michael@0: class Win2kResolverThunk : public ServiceResolverThunk {
michael@0:  public:
michael@0:   // The service resolver needs a child process to write to.
michael@0:   Win2kResolverThunk(HANDLE process, bool relaxed)
michael@0:       : ServiceResolverThunk(process, relaxed) {
michael@0:     win2k_ = true;
michael@0:   }
michael@0:   virtual ~Win2kResolverThunk() {}
michael@0: 
michael@0:  private:
michael@0:   virtual bool IsFunctionAService(void* local_thunk) const;
michael@0: 
michael@0:   DISALLOW_COPY_AND_ASSIGN(Win2kResolverThunk);
michael@0: };
michael@0: 
michael@0: // This is the concrete resolver used to perform service-call type functions
michael@0: // inside ntdll.dll on Windows 8.
michael@0: class Win8ResolverThunk : public ServiceResolverThunk {
michael@0:  public:
michael@0:   // The service resolver needs a child process to write to.
michael@0:   Win8ResolverThunk(HANDLE process, bool relaxed)
michael@0:       : ServiceResolverThunk(process, relaxed) {}
michael@0:   virtual ~Win8ResolverThunk() {}
michael@0: 
michael@0:  private:
michael@0:   virtual bool IsFunctionAService(void* local_thunk) const;
michael@0: 
michael@0:   DISALLOW_COPY_AND_ASSIGN(Win8ResolverThunk);
michael@0: };
michael@0: 
michael@0: }  // namespace sandbox
michael@0: 
michael@0: 
michael@0: #endif  // SANDBOX_SRC_SERVICE_RESOLVER_H__