tree 0963b346d63cc7ee44e3e769cc8435d224e17a87
parent 858c5e9abc5c614b2eceb6a361118f31821ac968
author Graf Yang <graf.yang@analog.com> 1248263784 +0000
committer Mike Frysinger <vapier@gentoo.org> 1253151117 -0400

Blackfin: improve double fault debug handling

Since the hardware only provides reporting for the last exception handled,
and the values are valid only when executing the exception handler, we
need to save the context for reporting at a later point.  While we do this
for one exception, it doesn't work properly when handling a second one as
the original exception is clobbered by the double fault.  So when double
fault debugging is enabled, create a dedicated shadow of these values and
save/restore out of there.  Now the crash report properly displays the
first exception as well as the second one.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>