add stub routines stackalloc() and stackfree().
run oldstack on g0's stack, just like newstack does,
so that oldstack can free the old stack.

R=r
DELTA=53  (44 added, 0 deleted, 9 changed)
OCL=20404
CL=20433
5 files changed
tree: e2b3b906ca88ce3e8ce7a528bde4a4f3e69f94c2
  1. doc/
  2. include/
  3. lib/
  4. pkg/
  5. src/
  6. test/
  7. usr/