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On Mon, Dec 09, 2013 at 22:20:47 +1100, matthew green wrote:
> > On Mon, 09 Dec 2013, Mouse wrote:
> > > I actually don't see anything that promises that a pointer to a
> > > function type may be converted to a pointer to void, nor back
> > > again (except, in each direction, when the original pointer is
> > > nil), much less promising anything about the results if it is
> > > done. But I haven't read over the whole thing recently enough
> > > to be sure there isn't such a promise hiding somewhere.
> > Sorry, I did not express myself clearly enough. C does not
> > promise that function pointers can be converted to or from void*
> > pointers, but I believe that all existing NetBSD implementations
> > do allow such conversions.
> if you include the powerpc64 port in the list of existing
> netbsd implementations, then we do have one.. or at least
> sort of. i don't recall the details, but they're not just
> simple pointers you jump to, and the descriptors take up
> more space than a normal pointer.
Itanium has fat function pointers - they point to a struct of code
address plus gp register value.
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