tree 325e53d05818f83356f82aebfdc338b0d6119774
parent e5cdcd582c7224467a6e5bc4ade5accce80fa09d
author Nathaniel Wesley Filardo <wes.filardo@scisemi.com> 1730225866 +0000
committer Nathaniel Wesley Filardo <VP331RHQ115POU58JFRLKB7OPA0L18E3@cmx.ietfng.org> 1732228104 +0000

switcher: ensure that MTCC is really NULL on fault

As @davidchisnall points out, just because sp's address is zero doesn't
mean that the rest of the cap is too.  So, if it looks like we're dead
in the water, make sure we're actually dead by zeroing mtcc completely.

While here, slightly tidy the code by flipping the condition and moving
the wedging operation out of line.  Add an instruction guaranteed to
trap after nulling MTCC.