Re: [PROPOSAL/PATCH] Remove PT_GNU_STACK support before 2.6.11

[Ingo Molnar]

* Andi Kleen <ak@xxxxxxx> wrote:

> > RWE. But if it triggers it shows up immediately so it's not like you
> > have no sign that something wrong is going on. Only grub-install
> > triggers it and no boot/install kernel i know of defaults to
> > PAE-enabled, that's what caused grub-install being used in an NX
> > scenario so infrequently.)
> > 
> > anyway, this particular flamewar might have made more sense last Summer.
> 
> Last summer nobody did change the 32bit ABI on x86-64.
> 
> I only started it because the bug reports are appearing now and it's
> clear now that we have a problem. 

the vanilla 2.6.10 x64 kernel, using 32-bit fedora userland boots fine
here, and gives a noexec stack:

 $ ./test-stack
 Segmentation fault
 $
 $ uname -a
 Linux saturn 2.6.10 #1 Sun Feb 6 15:52:44 CET 2005 x86_64 x86_64 x86_64 GNU/Linux
 $
 $ readelf -l test-stack | grep STA
   GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RW  0x4

	Ingo
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