Re: Regression on prelinked-sepdebug-shlibs

[Tristan Gingold <gingold@adacore.com>]

On Jan 7, 2010, at 12:09 PM, Jan Kratochvil wrote:

> On Thu, 07 Jan 2010 12:03:04 +0100, Tristan Gingold wrote:
> ...
>> I am not sure that you can create a linux native executable with a section whose vma is 0.
>> But unfortunately linux refuses to execute that (I got a sigkill very very
>> early) so I can't play with that.
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=434714
> 
> From Chuck Ebbert:
> echo "0" >/proc/sys/vm/mmap_min_addr
> That should fix it -- at least on F8 changing that from 0 to 32768 made it fail.
> (The executable code starts at 0.)
> 
> From Roland McGrath:
> Yup, I think this is pretty much expected behavior.
> i.e. an ET_EXEC with a p_vaddr at 0 is asking for a mmap that it is often
> security policy to refuse.  Unfortunately there really isn't much better than
> SIGKILL death that you can expect for this.

Ah, ah, you already tried that!

Unfortunately I am not root on these linux machine.  However, I can execute it with qemu.  So I can now play.

Thanks,
Tristan.