nx-bit and TPM

[metadev]

On 3/30/07, Alexander Leidinger <Alexander at leidinger.net> wrote:
> Quoting Dag-Erling Smørgrav <des at des.no> (from Thu, 29 Mar 2007
> 23:36:24 +0200):
>
> > Igor <runixd at 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 Module).
> >
> > 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.html

Bogdan