Re: [Announcement] "Exec Shield", new Linux security feature

[H. Peter Anvin]

Andi Kleen wrote:
>>
>>x86-64 definitely does, and it's the default on Linux/x86-64.
> 
> No we had to turn it off and now it's too late to turn it back on again.
> There is also one bug left that prevents it.
> 

Why is that?  And, in particular, why is it "too late to turn it back
on"?  It seems as long as it's clearly defined as the ABI that change
can be made later, effectively as a bug fix.

	-hpa