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Re: [autoconf] Problems Configuring (C Compiler cannot produce executabl


From: Jeffrey Walton
Subject: Re: [autoconf] Problems Configuring (C Compiler cannot produce executables)
Date: Thu, 23 Aug 2012 10:59:03 -0400

On Thu, Aug 23, 2012 at 9:13 AM, Jeffrey Walton <address@hidden> wrote:
> On Wed, Aug 22, 2012 at 9:41 PM, Mike Frysinger <address@hidden> wrote:
>> On Wednesday 22 August 2012 18:28:52 Russ Allbery wrote:
>>> special exceptions.  Being able to turn off executable stack as at least
>>> another easily-accessible option is an interesting idea, and I may raise
>>> that on debian-devel.  (Although it can be a little hard to predict which
>>> packages need that.
>>
>> it's trivial to locate:
>>         readelf -lW /bin/bash | grep GNU_STACK
>> if it's set as RWE, that's bad.  if the ELF lacks a GNU_STACK, that's bad.
> I believe there is more to it. The PT_GNU_STACK marking must be
> present *and* have a size of 0. See Ian Lance Taylor's blog
Bad reference (my apologies). Try Ian's blog on Executable Stacks
instead http://www.airs.com/blog/archives/518.

Jeff



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