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diff --git a/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp b/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp
new file mode 100644
index 000000000..1e8ed078d
--- /dev/null
+++ b/src/os_cpu/windows_x86/vm/unwind_windows_x86.hpp
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+
+#ifdef AMD64
+typedef unsigned char UBYTE;
+
+#define UNW_FLAG_EHANDLER  0x01
+#define UNW_FLAG_UHANDLER  0x02
+#define UNW_FLAG_CHAININFO 0x04
+
+// This structure is used to define an UNWIND_INFO that
+// only has an ExceptionHandler.  There are no UnwindCodes
+// declared.
+typedef struct _UNWIND_INFO_EH_ONLY {
+    UBYTE Version       : 3;
+    UBYTE Flags         : 5;
+    UBYTE SizeOfProlog;
+    UBYTE CountOfCodes;
+    UBYTE FrameRegister : 4;
+    UBYTE FrameOffset   : 4;
+    union {
+       OPTIONAL ULONG ExceptionHandler;
+       OPTIONAL ULONG FunctionEntry;
+    };
+    OPTIONAL ULONG ExceptionData[1];
+} UNWIND_INFO_EH_ONLY, *PUNWIND_INFO_EH_ONLY;
+
+
+/*
+typedef struct _RUNTIME_FUNCTION {
+    ULONG BeginAddress;
+    ULONG EndAddress;
+    ULONG UnwindData;
+} RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;
+*/
+
+typedef struct _DISPATCHER_CONTEXT {
+    ULONG64 ControlPc;
+    ULONG64 ImageBase;
+    PRUNTIME_FUNCTION FunctionEntry;
+    ULONG64 EstablisherFrame;
+    ULONG64 TargetIp;
+    PCONTEXT ContextRecord;
+//    PEXCEPTION_ROUTINE LanguageHandler;
+    char * LanguageHandler; // double dependency problem
+    PVOID HandlerData;
+} DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;
+
+typedef EXCEPTION_DISPOSITION (*PEXCEPTION_ROUTINE) (
+    IN PEXCEPTION_RECORD ExceptionRecord,
+    IN ULONG64 EstablisherFrame,
+    IN OUT PCONTEXT ContextRecord,
+    IN OUT PDISPATCHER_CONTEXT DispatcherContext
+);
+
+#endif // AMD64