Re: [announce] [patch] NX (No eXecute) support for x86,2.6.7-rc2-bk2

[Andi Kleen]

On Tue, 8 Jun 2004 05:07:12 -0400
Jakub Jelinek <jakub@xxxxxxxxxx> wrote:

> On Fri, Jun 04, 2004 at 06:13:04PM +0200, Andi Kleen wrote:
> > Of course that is only for the stack. Making the heap non executable
> > is another can of worms. I don't know if Fedora does that
> > too, SUSE and mainline x86-64 doesn't.
> 
> When I added PT_GNU_STACK, it was meant from the beginning as
> stack+heap+mmap w/o PROT_EXEC executability/non-executability.
> I don't think it makes any sense to have separate bits for heap and stack.
> Any program which assumes PROT_READ implies PROT_EXEC just can be marked
> PT_GNU_STACK PF_X.

heap execution seems to be a lot more common than stack execution.

-Andi
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