Alessandro Rubini authored Feb 22, 2017 and Adam Wujek committed Feb 28, 2017

This also allows to see how assert behaves (and verify it works):

    wrc# devmem 1d800 0
    Assertion failed (check_stack:18): Stack overflow! (0)
    Assertion failed (check_stack:18): Stack overflow! (0)
    [...]

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>