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