Re: [PATCH v3 3/3] MIPS: set stack/data protection as non-executable

[David Daney]

On 12/05/2014 11:44 AM, Christoph Lameter wrote:
> On Fri, 5 Dec 2014, David Daney wrote:
>
> > The problem is not with "modern" executables that are properly annotated with
> > PT_GNU_STACK.
> >
> > My objection is to the intentional breaking of old executables that have no
> > PT_GNU_STACK annotation, but require an executable stack.  Since we usually
> > try not to break userspace, we cannot merge a patch like this one.
>
> How old are these and how many are still around?

As far as I can determine, no official GCC release defaults to 
generating PT_GNU_STACK for MIPS, I could be mistaken though.  So to 
answer your questions:  Very young, and all of them.


> Can the annotation be added with a tool?

I don't know, although I seem to recall that such a tool existed, and I 
may have even used it in the past.  But, my google fu is not 
sufficiently advanced to find it now, if it exists.

David Daney

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