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Date:      Tue, 3 Apr 2007 17:43:08 +0300
From:      metadev <metadev@gmail.com>
To:        freebsd-security@freebsd.org
Subject:   Re: nx-bit and TPM
Message-ID:  <323b75e10704030743x46b25c41p6108dce5e93d58a8@mail.gmail.com>
In-Reply-To: <20070330100318.wbqww1rilcksskok@webmail.leidinger.net>
References:  <e318b01b0703291334q1e05eda4y36cdd8a86cb3c597@mail.gmail.com> <86648johpj.fsf@dwp.des.no> <20070330100318.wbqww1rilcksskok@webmail.leidinger.net>

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On 3/30/07, Alexander Leidinger <Alexander@leidinger.net> wrote:
> Quoting Dag-Erling Sm=F8rgrav <des@des.no> (from Thu, 29 Mar 2007
> 23:36:24 +0200):
>
> > Igor <runixd@gmail.com> writes:
> >> I'm was looking through handbook and wikipedia and it appears FreeBSD
> >> doesn't support hardware (nor software) nx bit.
> >> There also doesn't seem to be any support for TPM (Trusted Platform Mo=
dule).
> >
> > I believe NX support was never implemented because Intel's version of
> > AMD64 didn't support it.  As for TPM, I don't see the point.
>
> This should not stop us in using it on amd64 if available. I think one
> of the problem was/is the lack of time/man-power. So if someone comes
> up with a good (enough) implementation which works on our supported
> hardware, I don't think it will be rejected.
>

Please see this post for more info on the implications of using a
non-executable stack
http://lists.freebsd.org/pipermail/freebsd-security/2005-November/003318.ht=
ml

Bogdan



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