michael@0: // Copyright (c) 2011 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_WOW64_H__
michael@0: #define SANDBOX_SRC_WOW64_H__
michael@0: 
michael@0: #include <windows.h>
michael@0: 
michael@0: #include "base/basictypes.h"
michael@0: #include "sandbox/win/src/sandbox_types.h"
michael@0: 
michael@0: namespace sandbox {
michael@0: 
michael@0: class TargetProcess;
michael@0: 
michael@0: // This class wraps the code needed to interact with the Windows On Windows
michael@0: // subsystem on 64 bit OSes, from the point of view of interceptions.
michael@0: class Wow64 {
michael@0:  public:
michael@0:   Wow64(TargetProcess* child, HMODULE ntdll)
michael@0:       : child_(child), ntdll_(ntdll), dll_load_(NULL), continue_load_(NULL) {}
michael@0:   ~Wow64();
michael@0: 
michael@0:   // Waits for the 32 bit DLL to get loaded on the child process. This function
michael@0:   // will return immediately if not running under WOW, or launch the helper
michael@0:   // process and wait until ntdll is ready.
michael@0:   bool WaitForNtdll();
michael@0: 
michael@0:  private:
michael@0:   // Runs the WOW helper process, passing the address of a buffer allocated on
michael@0:   // the child (one page).
michael@0:   bool RunWowHelper(void* buffer);
michael@0: 
michael@0:   // This method receives "notifications" whenever a DLL is mapped on the child.
michael@0:   bool DllMapped();
michael@0: 
michael@0:   // Returns true if ntdll.dll is mapped on the child.
michael@0:   bool NtdllPresent();
michael@0: 
michael@0:   TargetProcess* child_;  // Child process.
michael@0:   HMODULE ntdll_;         // ntdll on the parent.
michael@0:   HANDLE dll_load_;       // Event that is signaled on dll load.
michael@0:   HANDLE continue_load_;  // Event to signal to continue execution on the child.
michael@0:   DISALLOW_IMPLICIT_CONSTRUCTORS(Wow64);
michael@0: };
michael@0: 
michael@0: }  // namespace sandbox
michael@0: 
michael@0: #endif  // SANDBOX_SRC_WOW64_H__