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Re: [Xen-users] Re: Xen and TLS, -mno-tls-direct-seg-refs needed?

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Subject: Re: [Xen-users] Re: Xen and TLS, -mno-tls-direct-seg-refs needed?
From: Sven Köhler <skoehler@xxxxxx>
Date: Mon, 14 Aug 2006 13:43:32 +0200
Cc: Molle Bestefich <molle.bestefich@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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> However, there is a fix in the later models of Opteron/Athlon64 processors 
> that allows segments to be used. Intel, I think, hasn't got this feature 
> (yet?)... 

And 64-Bit VMWare doesn't run without it, and my Athlon64-CPU doesn't
have segmentation-support yet :-(

(And so i guess, Intel CPUs have that feature)

> So for backwards compatibility reasons and such, the 64-bit version of Xen 
> uses a different method for protecting itself from being overwritten, and 
> therfore negative segment references work fine. 

I see. Thanks for the clarification.

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