linux-kernel - Re: Assignment of GDT entries

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Message-Id: <1158183322.16902.8.camel@localhost.localdomain>
Date:	Wed, 13 Sep 2006 22:35:21 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Zachary Amsden <zach@...are.com>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Linus Torvalds <torvalds@...l.org>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <ak@...e.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michael A Fetterman <Michael.Fetterman@...cam.ac.uk>
Subject: Re: Assignment of GDT entries

Ar Mer, 2006-09-13 am 13:59 -0700, ysgrifennodd Zachary Amsden:
> TLS #3 overlaps BIOS 0x40, but code which calls borken APM / PnP BIOS 
> and sets up protected mode 0x40 GDT segment does so by swapping out the 
> TLS segment with the identity simulation of physical 0x400 offset, 
> swapping it back afterwards.  Short of bugs in that code (which there 
> are, btw), you shouldn't need to be concerned with it.

Care to elucidate ?


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