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@c  COPYRIGHT (c) 1988-2002.

@c  On-Line Applications Research Corporation (OAR).

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@c  fatalerr.t,v 1.6 2002/01/17 21:47:46 joel Exp

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@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 a user-supplied fatal error

handler.  If no user-supplied handler is configured,  the RTEMS

provided default fatal error handler is invoked.  If the

user-supplied fatal error handler returns 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 fatal_error_occurred directive when there is no user handler

configured or the user handler returns control to RTEMS.  The

default fatal error handler disables processor interrupts (i.e.

sets the I bit in the PSW register to 0), places the error code

in r1, and executes a break instruction to simulate a halt

processor instruction.