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@@ -0,0 +1,117 @@
+#ifndef CYGONCE_KERNEL_EXCEPT_HXX
+#define CYGONCE_KERNEL_EXCEPT_HXX
+
+//==========================================================================
+//
+//	except.hxx
+//
+//	Exception handling declarations
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): 	nickg
+// Contributors:	nickg
+// Date:	1997-04-09
+// Purpose:	Define exception interfaces
+// Description:	The classes defined here collectively implement the
+//              internal API used to register, manage and deliver
+//              exceptions.
+// Usage:	#include <cyg/kernel/thread.hxx>
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <cyg/kernel/ktypes.h>
+#include <cyg/infra/cyg_ass.h>          // assertion macros
+#include <cyg/hal/hal_intr.h>           // exception defines
+
+// -------------------------------------------------------------------------
+// Exception handler function prototype
+
+typedef void cyg_exception_handler(
+    CYG_ADDRWORD        data,                   // user supplied data
+    cyg_code            exception_number,       // exception being raised
+    CYG_ADDRWORD        exception_info          // any exception specific info
+    );
+
+// -------------------------------------------------------------------------
+// Exception delivery interface. This function is exported to the HAL which
+// invokes it for all exceptions that it is not able to handle itself.
+
+externC void deliver_exception( CYG_WORD code, CYG_ADDRWORD data );
+
+// -------------------------------------------------------------------------
+// Exception control class. Depending on the configuration there is either
+// one of these per thread, or one for the entire system.
+
+#ifdef CYGPKG_KERNEL_EXCEPTIONS
+
+class Cyg_Exception_Control
+{
+
+#ifdef CYGSEM_KERNEL_EXCEPTIONS_DECODE
+    cyg_exception_handler   *exception_handler[CYG_EXCEPTION_COUNT];
+    
+    CYG_ADDRWORD            exception_data[CYG_EXCEPTION_COUNT];
+#else
+    cyg_exception_handler   *exception_handler; // Handler function
+    
+    CYG_ADDRWORD            exception_data;     // Handler data
+#endif
+
+public:
+
+    Cyg_Exception_Control();
+
+    // Register an exception handler for either the specific exception
+    // or for all exceptions.
+    void register_exception(
+        cyg_code                exception_number,       // exception number
+        cyg_exception_handler   handler,                // handler function
+        CYG_ADDRWORD            data,                   // data argument
+        cyg_exception_handler   **old_handler,          // handler function
+        CYG_ADDRWORD            *old_data               // data argument
+        );
+
+    // Remove an exception handler.
+    void deregister_exception(
+        cyg_code                exception_number        // exception number
+        );
+
+    // Deliver the given exception now by invoking the appropriate
+    // exception handler.
+    void deliver_exception(
+        cyg_code            exception_number,       // exception being raised
+        CYG_ADDRWORD        exception_info          // exception specific info
+        );
+};
+
+#endif
+
+// -------------------------------------------------------------------------
+#endif // ifndef CYGONCE_KERNEL_EXCEPT_HXX
+// EOF except.hxx