diff --git a/JavaScriptCore/kjs/ExecState.h b/JavaScriptCore/kjs/ExecState.h
new file mode 100644
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+++ b/JavaScriptCore/kjs/ExecState.h
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+/*
+ *  This file is part of the KDE libraries
+ *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
+ *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ *  Copyright (C) 2003 Apple Computer, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public License
+ *  along with this library; see the file COPYING.LIB.  If not, write to
+ *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef ExecState_H
+#define ExecState_H
+
+#include "value.h"
+#include "types.h"
+
+namespace KJS {
+    class Context;
+    
+  /**
+   * Represents the current state of script execution. This object allows you
+   * obtain a handle the interpreter that is currently executing the script,
+   * and also the current execution context.
+   */
+  class ExecState {
+    friend class Interpreter;
+    friend class FunctionImp;
+    friend class RuntimeMethodImp;
+    friend class GlobalFuncImp;
+  public:
+    /**
+     * Returns the interpreter associated with this execution state
+     *
+     * @return The interpreter executing the script
+     */
+    Interpreter* dynamicInterpreter() const { return m_interpreter; }
+
+    /**
+     * Returns the interpreter associated with the current scope's
+     * global object
+     *
+     * @return The interpreter currently in scope
+     */
+    Interpreter* lexicalInterpreter() const;
+
+    /**
+     * Returns the execution context associated with this execution state
+     *
+     * @return The current execution state context
+     */
+    Context* context() const { return m_context; }
+
+    void setException(JSValue* e) { m_exception = e; }
+    void clearException() { m_exception = 0; }
+    JSValue* exception() const { return m_exception; }
+    bool hadException() const { return m_exception; }
+
+  private:
+    ExecState(Interpreter* interp, Context* con)
+        : m_interpreter(interp)
+        , m_context(con)
+        , m_exception(0)
+    { 
+    }
+    Interpreter* m_interpreter;
+    Context* m_context;
+    JSValue* m_exception;
+  };
+
+} // namespace KJS
+
+#endif // ExecState_H