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+@c
+@c  COPYRIGHT (c) 1988-2002.
+@c  On-Line Applications Research Corporation (OAR).
+@c  All rights reserved.
+@c
+@c  $Id$
+@c
+
+@chapter Default Fatal Error Processing
+
+@section Introduction
+
+Upon detection of a fatal error by either the
+application or RTEMS the fatal error manager is invoked.  The
+fatal error manager will invoke the user-supplied fatal error
+handlers.  If no user-supplied handlers are configured,  the
+RTEMS provided default fatal error handler is invoked.  If the
+user-supplied fatal error handlers return to the executive the
+default fatal error handler is then invoked.  This chapter
+describes the precise operations of the default fatal error
+handler.
+
+@section Default Fatal Error Handler Operations
+
+The default fatal error handler which is invoked by
+the @code{rtems_fatal_error_occurred} directive when there is no user handler
+configured or the user handler returns control to RTEMS.  The
+default fatal error handler performs the following actions:
+
+@itemize @bullet
+
+@item places the error code in r3, and
+
+@item executes a trap instruction which results in a Program Exception.
+
+@end itemize
+
+If the Program Exception returns, then the following actions are performed:
+
+@itemize @bullet
+
+@item disables all processor exceptions by loading a 0 into the MSR, and
+
+@item goes into an infinite loop to simulate a halt processor instruction.
+
+@end itemize
+