Re: [Xen-devel] Re: NPTL/TLS "emulation" idea (fwd)

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

> On Wed, Oct 20, 2004 at 12:55:22PM -0400, Rik van Riel wrote:
> >    4. Provide an alternative libc that does the +ve accesses (which are
> >       libc private, afaik) in another segment.  This does not break the
> >       ABI for userland programs and -ve accesses aren't that bad when
> >       there are no +ve accesses in the same segment.
> 
> No, the ABI uses -ve accesses and %gs:0 (4 bytes there), +ve accesses
> above +4 are glibc private.

Could we duplicate %gs:0 at %gs:-4 and update the ABI? Or is the ABI
now set in stone?

 -- Keir


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