diff --git a/src/accessors.h b/src/accessors.h
new file mode 100644
index 0000000..51d322e
--- /dev/null
+++ b/src/accessors.h
@@ -0,0 +1,112 @@
+// Copyright 2006-2008 the V8 project authors. 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 V8_ACCESSORS_H_
+#define V8_ACCESSORS_H_
+
+namespace v8 {
+namespace internal {
+
+// The list of accessor descriptors. This is a second-order macro
+// taking a macro to be applied to all accessor descriptor names.
+#define ACCESSOR_DESCRIPTOR_LIST(V) \
+  V(FunctionPrototype)              \
+  V(FunctionLength)                 \
+  V(FunctionName)                   \
+  V(FunctionArguments)              \
+  V(FunctionCaller)                 \
+  V(ArrayLength)                    \
+  V(StringLength)                   \
+  V(ScriptSource)                   \
+  V(ScriptName)                     \
+  V(ScriptId)                       \
+  V(ScriptLineOffset)               \
+  V(ScriptColumnOffset)             \
+  V(ScriptData)                     \
+  V(ScriptType)                     \
+  V(ScriptCompilationType)          \
+  V(ScriptLineEnds)                 \
+  V(ScriptContextData)              \
+  V(ScriptEvalFromFunction)         \
+  V(ScriptEvalFromPosition)         \
+  V(ObjectPrototype)
+
+// Accessors contains all predefined proxy accessors.
+
+class Accessors : public AllStatic {
+ public:
+  // Accessor descriptors.
+#define ACCESSOR_DESCRIPTOR_DECLARATION(name) \
+  static const AccessorDescriptor name;
+  ACCESSOR_DESCRIPTOR_LIST(ACCESSOR_DESCRIPTOR_DECLARATION)
+#undef ACCESSOR_DESCRIPTOR_DECLARATION
+
+  enum DescriptorId {
+#define ACCESSOR_DESCRIPTOR_DECLARATION(name) \
+    k##name,
+  ACCESSOR_DESCRIPTOR_LIST(ACCESSOR_DESCRIPTOR_DECLARATION)
+#undef ACCESSOR_DESCRIPTOR_DECLARATION
+    descriptorCount
+  };
+
+  // Accessor functions called directly from the runtime system.
+  static Object* FunctionGetPrototype(Object* object, void*);
+  static Object* FunctionSetPrototype(JSObject* object, Object* value, void*);
+ private:
+  // Accessor functions only used through the descriptor.
+  static Object* FunctionGetLength(Object* object, void*);
+  static Object* FunctionGetName(Object* object, void*);
+  static Object* FunctionGetArguments(Object* object, void*);
+  static Object* FunctionGetCaller(Object* object, void*);
+  static Object* ArraySetLength(JSObject* object, Object* value, void*);
+  static Object* ArrayGetLength(Object* object, void*);
+  static Object* StringGetLength(Object* object, void*);
+  static Object* ScriptGetName(Object* object, void*);
+  static Object* ScriptGetId(Object* object, void*);
+  static Object* ScriptGetSource(Object* object, void*);
+  static Object* ScriptGetLineOffset(Object* object, void*);
+  static Object* ScriptGetColumnOffset(Object* object, void*);
+  static Object* ScriptGetData(Object* object, void*);
+  static Object* ScriptGetType(Object* object, void*);
+  static Object* ScriptGetCompilationType(Object* object, void*);
+  static Object* ScriptGetLineEnds(Object* object, void*);
+  static Object* ScriptGetContextData(Object* object, void*);
+  static Object* ScriptGetEvalFromFunction(Object* object, void*);
+  static Object* ScriptGetEvalFromPosition(Object* object, void*);
+  static Object* ObjectGetPrototype(Object* receiver, void*);
+  static Object* ObjectSetPrototype(JSObject* receiver, Object* value, void*);
+
+  // Helper functions.
+  static Object* FlattenNumber(Object* value);
+  static Object* IllegalSetter(JSObject*, Object*, void*);
+  static Object* IllegalGetAccessor(Object* object, void*);
+  static Object* ReadOnlySetAccessor(JSObject*, Object* value, void*);
+};
+
+} }  // namespace v8::internal
+
+#endif  // V8_ACCESSORS_H_