In article
<[EMAIL PROTECTED]>, Daniel
Eischen <[EMAIL PROTECTED]> wrote:
> I think the only reason we used %fs instead of %gs was WINE. I
> think Linux uses %gs for TSD, so if WINE were to ever depend on
> linuxthreads, one of them would have to change.
At least on Red Hat 7.0 (glibc-2.1.92-14), Linux does not use a
segment register to find TSD. It aligns all stacks at a multpile
of 2MB and then does bit ops on the current stack pointer to find a
thread control block at the base (highest address) of the stack.
There is an alternate implementation in that version of glibc which
uses %gs to find TSD. However, it is not used in this version of
Linux. I don't know whether it's used in other versions or not.
John
--
John Polstra [EMAIL PROTECTED]
John D. Polstra & Co., Inc. Seattle, Washington USA
"Disappointment is a good sign of basic intelligence." -- Chögyam Trungpa
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