[Patch] libffi: Add MIPS64 support.

[Maciej W. Rozycki]

On Thu, 9 Aug 2007, Richard Sandiford wrote:

> > In the first case, you are probably correct. We are copying the pointer 
> > into a wider  type.   In practice it does not matter because all valid 
> > user space pointers have the high bit clear so there would never be a 
> > case where the not sign extending would produce a different result than 
> > if you did sign extend.
> 
> Ah, so we don't support running libffi from kernel space?  I was assuming
> we needed to cope with both.  If we don't, it is indeed a non-issue.

 It sounds like carelessness to me -- I would watch out.

  Maciej