Octane port - discoveries

[Stanislaw Skowronek <sskowron@ET.PUT.Poznan.PL>]

Well, I've just noticed that get_saved_sp (in asm.h) is purely 32-bit.
After making a 64-bit-clean version (well, the Octane has its kernel_sp in
xkphys, not in ckseg0) the system boots a little farther. Still, it gets a
flagrant SIGSEGV, but at least it does not disappear without trace after
going usermode.

In fact it gets _infinite_ SIGSEGVs in mm/fault.c.

Time to get back to work.

Stanislaw Skowronek

--<=>--
  "You're not as old as the trees, not as young as the leaves.
   Not as free as the breeze, not as open as the seas."