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Re: libffi & powerpc
Patrick Olinet writes:
> Finally, I've tried it the dirty way, ie by commenting out all the
> "stfd" instructions at the beginning of the ppc_closure.S file and
> things seem to work !!!
>
> "stfd" are used to save fpu registers and were always executed, even
> if no float/double arguments were involved in the call and if no fpu
> is present.
>
> Of course, I'm still unable to use float/double with the libffi but I
> don't need it so I don't think I'm going to dig into this. As far as I
> understand, calls to the soft float ABI would be required to fix this.
I guess that's ok.
> What worries me a bit is that "stfd" instructions are used to save fpu
> registers states before the call (it's my guess) and I would expect
> them to be restored afterwards, probably with "lfd" assembly
> instructions (that I would need to comment out as well). But I can't
> see such instructions...
>
> Any thoughts about that ?
It doen't matter, because the caller knows that these registers will
not be saved.
> And should I report a new bug for this libffi/powerpc problem ?
It wouldn't hurt.
Andrew.