* Does Linux support Data Exectiion Protection ?
@ 2009-07-29 14:08 Aaron Gray
2009-07-29 14:36 ` Arjan van de Ven
0 siblings, 1 reply; 2+ messages in thread
From: Aaron Gray @ 2009-07-29 14:08 UTC (permalink / raw)
To: Linux Kernel Mailing List
Does Linux suppoert DEP, on newer x86 CPU's ?
I am wondering as this does effect alot of VM's using JIT technology if they
are wriiten without proper code memory allocation. This is a problem for
StrongTalk and FoNC' IDC. If EP is availiable how configurable is it ?
Many thanks in advance,
Aaron
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Does Linux support Data Exectiion Protection ?
2009-07-29 14:08 Does Linux support Data Exectiion Protection ? Aaron Gray
@ 2009-07-29 14:36 ` Arjan van de Ven
0 siblings, 0 replies; 2+ messages in thread
From: Arjan van de Ven @ 2009-07-29 14:36 UTC (permalink / raw)
To: Aaron Gray; +Cc: Linux Kernel Mailing List
On Wed, 29 Jul 2009 15:08:35 +0100
"Aaron Gray" <aaronngray.lists@googlemail.com> wrote:
> Does Linux suppoert DEP, on newer x86 CPU's ?
it does and has been for the better part of at least 5 years.
> I am wondering as this does effect alot of VM's using JIT technology
> if they are wriiten without proper code memory allocation.
given how old our support is, all JITs seem to be working.
In addition there is a compatibility provision for legacy binaries
implemented.
> This is a
> problem for StrongTalk and FoNC' IDC. If EP is availiable how
> configurable is it ?
just make sure you use 64 bit pagetables (either a 64 bit kernel or a
32 bit kernel with PAE support) and you get the support.
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
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