Add an option to report panics in a new stack

For particularly nasty errors the stack or stack pointer may be corrupt,
or in a place that we do not want overwritten. Provide and option to
place the stack in a fresh place, assuming you can reach exception_panic().

Note that exception_panic() does not write anything to stack itself.

BUG=chrome-os-partner:10146
TEST=manual:
build for all boards
On snow, cause a panic and see that it is reported correctly.

Change-Id: I21d8b9bb12455758309d54ef20de66640d8a2df6
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/24504

0 files changed, 0 insertions, 0 deletions