change magic number when walking across sigtramp frame

show return pc symbolically (to be correct should actually figure
out the address of the call[sg], not just display the return pc, but that's
too much work for me)

use %x not %X

check kernel stack addresses properly; reformat a la Bourne for consistency

updated for revision to signals

fix frame offset for new signal code

print variables ($v) in hex; make $<- re-read current file

works, still with prings

new attempt

non-working version

date and time created 81/05/14 15:19:56 by root