powerpc: Fix Text randomization

[Vineeth Vijayan]

ping !

any update on this ? As i understand, only powerpc and s390 uses the
randomize_et_dyn call; for all other architecture this is an obsolete
function call.

this call for another patch where randomize_et_dyn is removed.

Vineeth

On Wed, Oct 15, 2014 at 12:08 PM, Vineeth Vijayan <vvijayan at mvista.com>
wrote:

> On Wed, Oct 15, 2014 at 7:38 AM, Michael Ellerman <mpe at ellerman.id.au>
> wrote:
> > On Fri, 2014-10-10 at 05:45:26 UTC, Vineeth Vijayan wrote:
> >> Right now there is no way to disable TEXT randomization on a PPC32
> >> machine. text randomization happens even in the case of "echo 0 >
> >> /proc/sys/kernel/randomize_va_space"
> >
> > Yeah it seems to happen on ppc64 too.
> >
> >> This happens due to the incorrect definition of ELF_ET_DYN_BASE at
> >> arch/powerpc/include/asm/elf.h
> >
> > What is incorrect about it? We are not the only arch that does that.
> >
>
> I think we are one of the arch which does it.
> The same has been tested on x86 and arm, where ELF_ET_DYN_BASE doesn’t
> use randomize_et_dyn call, and it works properly as per the user-space
> definition of randomization;
>
> (i.e when at "echo 0 > /proc/sys/kernel/randomize_va_space", TEXT
> randomization should not happen.)
>
> > I'm not clear on what has changed to break this?
> >
> > cheers
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20141114/8059819a/attachment.html>