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Subject: Re: Using %cr2 to reference "current"
To: torvalds@transmeta.com (Linus Torvalds)
Date: Tue, 6 Nov 2001 17:46:05 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org
In-Reply-To: <9s956o$24b$1@penguin.transmeta.com> from "Linus Torvalds" at Nov 06, 2001 05:04:24 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> We pretty much know the _theory_ is not correct, just by virtue of
> depending on non-architected behaviour.  The only thing -ac can do is
> test whether it works in practice.  Which is a totally different thing. 

Yep

> Especially on x86 chips.

Well so far I've found one laptop that eats %cr2 on APM calls, and we have
some mystery cases. Peter's suggestion of using %fs or %gs looks more
promising at the moment

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