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

[Andi Kleen]

On Sun, Feb 06, 2005 at 02:04:57PM +0100, Arjan van de Ven wrote:
> 
> > Hmm, I got a report that it doesn't work anymore with 
> > 2.6.11rcs on x86-64. I haven't looked  closely yet,
> > but it wouldn't surprise me if this change isn't also involved.
> 
> PT_GNU_STACK change is there since like 2.6.6 (and was put in by a suse person)
> To me that is a strong indication that you are wrong on your
> suspicion...

Nah, the change to break 32bit userland mmap/mprotect like this was only 
put in after 2.6.10. 

64bit userland on the other hand always honored PROT_EXEC, but 
before PT_GNU_STACK it would run by default with executable stack. 

Hmm, I admit that my patch will break this case too, but fixing
that (setting READ_IMPLIES_EXEC only for 32bit) 
would require more complicated changes that may not be appropiate
for 2.6.11. If it's deemed appropiate I could do such a patch too
though.

-Andi
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