On Tue, Sep 28, 2004 at 12:03:10 +0200, Martin Husemann wrote:

> On Tue, Sep 28, 2004 at 07:00:59PM +0900, TAMURA Kent wrote:
> > IMO, the issue seems not significant if no other applications
> > use %fs register.
> 
> What does the ABI say about %fs?

%cs, %ds, %es, %ss

    The segment registers are initialized so that the user process can
    address the code, data, and stack segments using a 32-bit virtual
    address. A program that alters their values does not conform to
    the ABI and has undefined behavior.

It doesn't mention %fs and %gs, I'd assume they are to be treated no
differently from %ds and %es.

SY, Uwe
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