Re: 64bit port
H. Peter Anvin (hpa@transmeta.com)
Sat, 01 May 1999 03:32:48 -0700
David Miller wrote:
>
> Date: Sat, 1 May 1999 11:11:21 +0100 (GMT)
> From: Alex Buell <alex.buell@tahallah.demon.co.uk>
>
> Ie. on loading of a binary could quickly scan it for illegal
> sequences and overwrite with NOPs, then execute it. Of course, this
> doesn't cater for things that does J-I-T compilation & execution
> though.
>
> You roughly have described how we hope to work around it.
>
> IRIX does something very similar to work around cpu lockup
> bugs on early MIPS r4k parts.
>
I'd be really curious to hear the details. Are you making it illegal to
map a page both writable and executable?
-hpa
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