Re: IA64/x86-64 and execution protection support?

[David Mosberger]

>>>>> On Mon, 3 Nov 2003 08:49:33 -0600, Joseph Pingenot <trelane@xxxxxxxxxxxxxx> said:

  Joseph> Hello.  I was reading El Reg this morning when they
  Joseph> discussed "execution protection" on the new Intel (IA64) and
  Joseph> AMD (K8 and above) chips.  Does the Linux kernel have
  Joseph> support for preventing execution of certain memory regions
  Joseph> on those architectures?

Yes, on ia64, data and stack do not get mapped executable by default.
Also, return addresses (under the discretion of the compiler) are
virtually always stored on a separate register stack, making it more
difficult to use memory stack overflows to overwrite return addresses.

	--daviid
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