On Sat, Aug 20, 2005 at 04:02:29PM +0100, segv wrote:
> sometimes it crashes in pthreads library with SIGBUS, sometimes in Xft library
> with SIGSEGV

I think this are two problems, the font rendering code might have alignement
(and other) bugs; the second effect is a register window handling problem
that effectively zeros a whole bunch of registers on return from a syscall.
My guess is the return path to userland eroneously restoring registers from
the trapframe instead of the window save area in the pcb - but I don't see
how it could happen.

Martin