6950178: Zero stack improvements
Summary: Moves the logic for determining the size of the Zero stack into the ZeroStack class.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
6949423: remove tagged stack interpreter for Zero
Summary: Missed Zero changes for 6943304.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>