Date: Fri, 11 Feb 2005 09:30:34 -0500 From: Coleman Kane <zombyfork@gmail.com> To: Jimmy <freebsd@oranged.to> Cc: freebsd-amd64@freebsd.org Subject: Re: FreeBSD x86 vs x86-64 Questions about Security Message-ID: <346a8022050211063022cb57e2@mail.gmail.com> In-Reply-To: <420C649D.8070502@oranged.to> References: <420C649D.8070502@oranged.to>
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Hi Jimmy. On Fri, 11 Feb 2005 07:54:05 +0000, Jimmy <freebsd@oranged.to> wrote: > Hello, > > I Am interested to know several questions.. > > - Currently I am using FreeBSD x86-64 I have compiled the majority of my > applications up using the right compiler flags to support the 64bit OS. > Is there any way within the Operating system that I can turn off 32bit > support? You should be able to remove COMPAT_IA32 from your kernel config. > > - Are applications that have been compiled for the amd-64 platform still > vulnerable to x86 style attacks because of the backwards compatability > mode? (eg remote buffer overflows in say.. openssh?). > AMD64 has a per-page NX (non-executable) bit, I however am not aware if FreeBSD uses this in the code pages. --coleman > Thanks > > J > _______________________________________________ > freebsd-amd64@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 > To unsubscribe, send any mail to "freebsd-amd64-unsubscribe@freebsd.org" >
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