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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SANDBOX_SRC_WOW64_H__
#define SANDBOX_SRC_WOW64_H__
#include <windows.h>
#include "base/basictypes.h"
#include "sandbox/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), init_(false), 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(DWORD timeout_ms);
// Returns true if this is a 32 bit process running on a 64 bit OS.
bool IsWow64();
private:
// Runs the WOW helper process, passing the address of a buffer allocated on
// the child (one page).
bool RunWowHelper(void* buffer, DWORD timeout_ms);
// This method receives "notifications" whenever a DLL is mapped on the child.
bool DllMapped(DWORD timeout_ms);
// 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.
bool init_; // Initialization control.
bool is_wow64_; // true on WOW64 environments.
DISALLOW_IMPLICIT_CONSTRUCTORS(Wow64);
};
} // namespace sandbox
#endif // SANDBOX_SRC_WOW64_H__
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