Date: Sun, 30 Jan 2000 10:41:43 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Martin Stromberg <eplmst AT lu DOT erisoft DOT se>
cc: djgpp AT delorie DOT com
Subject: Re: posix threads with djgpp
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On 26 Jan 2000, Martin Stromberg wrote:

> What would happen in the DOZE calls if the signal
> machinery invalidated CS instead of DS?

An instant crash ;-).

You cannot invalidate CS because then the code of the
interrupt/exception handler cannot run.  CS is the only segment
register which is guaranteed to be loaded with a correct selector when
the handler is called, precisely for this reason.