Re: machine independent protection from stack-smashing attack

[Michael Nelson <mikenel () IAPETUS COM>]

On Mon, 11 Sep 2000, Yarrow Charnot wrote:

> In other words, if the attribute READ is set, the page is automatically made
> EXECUTABLE. If you trace NT and 9X kernels up to the point where they set
> that attribute, they ignore your request to make it READ-ONLY
> (NON-EXECUTABLE) on purpose. What purpose? Who on Earth would want to keep
> your data segments executable??? If you want to make it executable, one call
> to this function enables it for you! Why did they restrict its behaviour
> completely disallowing *READ ONLY* pages???

Intel X86 does not support exec/noexec on a per-page basis.

-mike