question regarding StgRun / StgReturn

[Joe Buehler]

Peter Tanski wrote:

> would grow) it moves up the stack (addl back up into the stack).  This
> would save memory (RESERVED_C_STACK_BYTES is defined in Constants.h as
> (2048 * SIZEOF_LONG)) but only if it is already known that the stack
> space above was used by the GHC program.  The point being that knowing
> what is controlling the stack you are using--GHC or the C
> compiler--would help.  Am I way off here?

I got the hppa registerised port running.  StgRun is supposed to push
registers on the stack and then allocate a further RESERVED_C_STACK_BYTES
before calling into STG-world.  The STG code ends up with
RESERVED_C_STACK_BYTES at top of stack for whatever it wants to use it for.
-- 
Joe Buehler