concurrent sysctl implementation

[Ed Schouten]

* Jeremie Le Hen <jeremie at le-hen.org> wrote:
> On Fri, Jul 24, 2009 at 11:18:42AM +0300, Kostik Belousov wrote:
> > On Fri, Jul 24, 2009 at 09:34:51AM +0200, Jeremie Le Hen wrote:
> > > Hi Ed,
> > > 
> > > Sorry for the late reply.
> > > 
> > > On Sat, May 09, 2009 at 02:13:13PM +0200, Ed Schouten wrote:
> > > > We probably could. I think I discussed this with Robert Watson some time
> > > > ago and we could use things like ELF hints. But still, that doesn't
> > > > prevent us from reaching this limitation later on.
> > > 
> > > Can you elaborate a little?  Are you talking about elf-hints.h?
> > > I don't see where we can get randomness from it.
> > 
> > The thing is called ELF auxillary information vector. It is used to
> > supply some useful information for interpreter from the kernel,
> > see include/machine/elf.h for AT_* entries.
> 
> Ah ok, so the idea is to generate a new hint, for instance AT_RANDOM,
> generated at link time, that will be used to fill the canary at exec(2)
> time?

Very short answer: yes!

-- 
 Ed Schouten <ed at 80386.nl>
 WWW: http://80386.nl/
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