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Re: [Patch] libffi: Add MIPS64 support.
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