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On Fri, Jul 15, 2016 at 12:52:33PM +0200, Florian Weimer wrote:
> On 07/15/2016 02:45 AM, Paul Eggert wrote:
> >On 07/14/2016 01:27 PM, Florian Weimer wrote:
> >>GDB does this to disable randomization:
> >
> >Thanks. Emacs disables ASLR by invoking the 'setfattr -n user.pax.flags
> >-v er' shell command on the Emacs executable before running it ('paxctl
> >+a' on older systems). Does this approach not work on ppc64? If not,
> >what shell command would work?
>
> I have never seen these commands before. On mainline Linux, you need to
> use setarch (perhaps from a shell script wrapper), and this calls
> personality internally.
One has to use personality(personality(0xffffffff)|ADDR_NO_RANDOMIZE)
approach as implemented in GDB, a simple shell script wrapper cannot
implement this.
user.pax.flags is a PaX specific, mainline linux kernel doesn't recognize
this attribute.
--
ldv
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