Date: Thu, 29 Mar 2007 15:08:30 -0700 From: Chuck Swiger <cswiger@mac.com> To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= <des@des.no> Cc: freebsd-security@freebsd.org, Igor <runixd@gmail.com> Subject: Re: nx-bit and TPM Message-ID: <790D20BF-A432-454A-B203-AD7A901B1309@mac.com> In-Reply-To: <86648johpj.fsf@dwp.des.no> References: <e318b01b0703291334q1e05eda4y36cdd8a86cb3c597@mail.gmail.com> <86648johpj.fsf@dwp.des.no>
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On Mar 29, 2007, at 2:36 PM, Dag-Erling Sm=F8rgrav wrote: >> 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 =20 >> 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. Intel supports the same capability in newer revisions of their EM64T =20 CPUs, but they call it the "XD" bit instead (for eXecute Disabled). =20 There's a reasonable set of documentation here: http://en.wikipedia.org/wiki/NX_bit#FreeBSD --=20 -Chuck
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