lkml.org 
[lkml]   [2007]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: how to determine if the noexec stack is defined by an application
From
Date
On Sat, 2007-06-30 at 00:15 +0200, Andreas Schwab wrote:
> Arjan van de Ven <arjan@infradead.org> writes:
>
> > like this:
> >
> > $ eu-readelf -l /bin/true | grep STACK
> > GNU_STACK 0x000000 0x00000000 0x00000000 0x000000 0x000000 RW 0x4
> >
> >
> > (replace /bin/true with the binary or library you want to check)
> >
> > if it says "RW" like here, it'll have non-executable stack. If it says
> > "RWX" or if this line is absent entirely, the stack will be executable.
>
> The last part is not true. Some architectures (especially newer ones)
> default to non-exec stack. The absense of a GNU_STACK header represents
> the default.

ok you're right; powerpc64 defaults to non-executable stack
(all others default to executable stack)

--
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-06-30 00:31    [W:0.059 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site