[rescue] A perverse thought (SGI security division)

Janet L. Campbell janet at foonly.com
Mon Mar 15 13:07:15 CST 2004

On Fri, 12 Mar 2004, Francisco Javier Mesa-Martinez wrote:

> I believe that the openBSD people went a step further and made the stack
> non executable, openBSD is still rather annoying in some things but maybe

The SPARC V9 ABI mandates a nonexecutable stack.  Solaris with the
noexec_user_stack variable set will also mark stack space as nonexecutable
for 32-bit apps.  This breaks the V8 ABI slightly, but it only really
messes up trampolines and some LISPy stuff.

Note that this does nothing for an exploit in heap space.

> is just because I have had to read posts from Theo taling out of his arse
> sometimes on architectural concepts. But I sort of understand what they
> are aiming for and I must respect that (then again I am also old school
> netBSD and freeBSD so I stick to those BSDs whenever possible).

Theo is out there sometimes, and I have my differences of opinion with 
him, but he has managed to accomplish quite a bit of useful stuff.


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