[Info-vax] An old VMS vulnerability, was: Re: Calling standards, was: Re: Byte range locking - was Re: Oracle
Stephen Hoffman
seaohveh at hoffmanlabs.invalid
Tue Nov 29 09:43:53 EST 2016
On 2016-11-29 13:12:20 +0000, Simon Clubley said:
> Also, I really hope that VSI are making liberal use of the no-execute
> capability in x86-64 for what should be data-only memory pages.
No-execute is only part of the puzzle.
https://en.wikipedia.org/wiki/Return-oriented_programming ASLR and
other details are also involved.
With OpenVMS memory management on x86-64, the VSI plan to compress
user, supervisor and executive modes into one processor ring — with
some sort of software enforcement — looks rather different from
previous designs. How this all works and how this all performs, we
shall learn.
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