* Jeremy Fitzhardinge <[email protected]> wrote:
> > that loads (and uses) a single selector value for %fs, and doesnt do
> > any mixed use as far as i can see.
>
> I'm not sure what you're getting at. Each loop iteration is analogous
> to a user->kernel->user transition with respect to the
> save/reload/use/restore pattern on the segment register. In this
> case, %fs starts as a null selector, gets reloaded with a non NULL
> selector, and then is restored to null. Do you mean some other
> mixing?
yeah, mixed use: i.e. set up /two/ selector values and load them into
%gs and read+write memory through them. It might not change the results,
but that's what i meant under 'mixed use'.
Ingo
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