diff --git a/reactos/include/ntos/except.h b/reactos/include/ntos/except.h
new file mode 100644
index 00000000000..c7d24b7a633
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+++ b/reactos/include/ntos/except.h
@@ -0,0 +1,145 @@
+/*
+ * COPYRIGHT:    See COPYING in the top level directory
+ * PROJECT:      ReactOS kernel
+ * FILE:         include/ntos/except.h
+ * PURPOSE:      Exception handling structures
+ * PROGRAMMER:   Casper S. Hornstrup <chorns@users.sourceforge.net>
+ */
+
+#ifndef __INCLUDE_EXCEPT_H
+#define __INCLUDE_EXCEPT_H
+
+typedef enum {
+	ExceptionContinueExecution = 0,
+	ExceptionContinueSearch,
+	ExceptionNestedException,
+	ExceptionCollidedUnwind,
+  ExceptionDismiss  // ???
+} EXCEPTION_DISPOSITION;
+
+
+struct _EXCEPTION_RECORD;
+struct _EXCEPTION_REGISTRATION;
+
+/*
+ * The type of function that is expected as an exception handler to be
+ * installed with _try1.
+ */
+typedef EXCEPTION_DISPOSITION CDECL (*PEXCEPTION_HANDLER)(
+  struct _EXCEPTION_RECORD* ExceptionRecord,
+  struct _EXCEPTION_REGISTRATION* ExceptionRegistration,
+  struct _CONTEXT* Context,
+  PVOID DispatcherContext);
+
+
+#define EXCEPTION_MAXIMUM_PARAMETERS	(15)
+
+typedef struct _EXCEPTION_RECORD {
+  DWORD ExceptionCode;
+  DWORD ExceptionFlags;
+  struct _EXCEPTION_RECORD *ExceptionRecord;
+  PVOID ExceptionAddress;
+  DWORD NumberParameters;
+  DWORD ExceptionInformation[EXCEPTION_MAXIMUM_PARAMETERS];
+} EXCEPTION_RECORD, *PEXCEPTION_RECORD, *LPEXCEPTION_RECORD;
+
+/* ExceptionFlags */
+#ifndef _GNU_H_WINDOWS32_DEFINES
+#ifdef __NTOSKRNL__
+#define	EXCEPTION_NONCONTINUABLE	0x01
+#endif /* __NTOSKRNL__ */
+#endif /* _GNU_H_WINDOWS32_DEFINES */
+#define	EXCEPTION_UNWINDING       0x02
+#define	EXCEPTION_EXIT_UNWIND		  0x04
+#define	EXCEPTION_STACK_INVALID	  0x08
+#define	EXCEPTION_NESTED_CALL		  0x10
+
+
+typedef struct _EXCEPTION_POINTERS { 
+  PEXCEPTION_RECORD ExceptionRecord; 
+  PCONTEXT ContextRecord; 
+} EXCEPTION_POINTERS, *PEXCEPTION_POINTERS, *LPEXCEPTION_POINTERS; 
+
+
+typedef struct _EXCEPTION_REGISTRATION
+{
+	struct _EXCEPTION_REGISTRATION*	prev;
+	PEXCEPTION_HANDLER		handler;
+} EXCEPTION_REGISTRATION, *PEXCEPTION_REGISTRATION;
+
+typedef EXCEPTION_REGISTRATION EXCEPTION_REGISTRATION_RECORD;
+typedef PEXCEPTION_REGISTRATION PEXCEPTION_REGISTRATION_RECORD;
+
+
+/*
+ * A macro which installs the supplied exception handler.
+ * Push the pointer to the new handler onto the stack,
+ * then push the pointer to the old registration structure (at fs:0)
+ * onto the stack, then put a pointer to the new registration
+ * structure (i.e. the current stack pointer) at fs:0.
+ */
+#define __try1(pHandler) \
+	__asm__ ("pushl %0;pushl %%fs:0;movl %%esp,%%fs:0;" : : "g" (pHandler));
+
+
+/*
+ * A macro which (dispite its name) *removes* an installed
+ * exception handler. Should be used only in conjunction with the above
+ * install routine __try1.
+ * Move the pointer to the old reg. struct (at the current stack
+ * position) to fs:0, replacing the pointer we installed above,
+ * then add 8 to the stack pointer to get rid of the space we
+ * used when we pushed on our new reg. struct above. Notice that
+ * the stack must be in the exact state at this point that it was
+ * after we did _try1 or this will smash things.
+ */
+#define	__except1	\
+	__asm__ ("movl (%%esp),%%eax;movl %%eax,%%fs:0;addl $8,%%esp;" \
+	 : : : "%eax");
+
+
+#if 1
+
+// Runtime DLL structures
+
+#ifndef _GNU_H_WINDOWS32_DEFINES
+#ifdef __NTOSKRNL__
+#define EXCEPTION_EXECUTE_HANDLER     1
+#define EXCEPTION_CONTINUE_SEARCH     0
+#define EXCEPTION_CONTINUE_EXECUTION -1
+#endif /* __NTOSKRNL__ */
+#endif /* _GNU_H_WINDOWS32_DEFINES */
+
+// Functions of the following prototype return one of the above constants
+typedef DWORD CDECL (*PSCOPE_EXCEPTION_FILTER)(VOID);
+typedef VOID CDECL (*PSCOPE_EXCEPTION_HANDLER)(VOID);
+
+typedef struct _SCOPETABLE_ENTRY
+{
+  DWORD                    PreviousTryLevel;
+  PSCOPE_EXCEPTION_FILTER  FilterRoutine;
+  PSCOPE_EXCEPTION_HANDLER HandlerRoutine;
+} SCOPETABLE_ENTRY, *PSCOPETABLE_ENTRY;
+
+/*
+   Other structures preceeding this structure:
+     ULONG_PTR              StandardESPInFrame;
+     LPEXCEPTION_POINTERS   ExceptionPointers;
+ */
+typedef struct _RTL_EXCEPTION_REGISTRATION_I386
+{
+  EXCEPTION_REGISTRATION OS;
+  PSCOPETABLE_ENTRY ScopeTable;
+  DWORD             TryLevel;
+  /* Value of EBP before the EXCEPTION_REGISTRATION was created */
+  ULONG_PTR         Ebp;
+} RTL_EXCEPTION_REGISTRATION_I386, *PRTL_EXCEPTION_REGISTRATION_I386;
+
+#define TRYLEVEL_NONE -1
+
+typedef RTL_EXCEPTION_REGISTRATION_I386 RTL_EXCEPTION_REGISTRATION;
+typedef PRTL_EXCEPTION_REGISTRATION_I386 PRTL_EXCEPTION_REGISTRATION;
+
+#endif
+
+#endif /* __INCLUDE_EXCEPT_H */