question regarding StgRun / StgReturn

[Duncan Coutts]

On Tue, 2007-07-24 at 15:16 -0400, Joe Buehler wrote:
> 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.

Well done!

If you think it's all working and have patches against ghc-6.6.1 then
we'd be glad to use them in the Gentoo ebuild. We've got an hppa build,
but unregisterised of course.

Duncan