forked from Imagelibrary/rtems
6449498bc7
* SUPPORT, LICENSE: New files. * Numerous files touched as part of merging the 4.5 branch onto the mainline development trunk and ensuring that the script that cuts snapshots and releases works on the documentation.
48 lines
1.3 KiB
Perl
48 lines
1.3 KiB
Perl
@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
|
|
|