On 11/04/2013 05:43 PM, Joseph S. Myers wrote:
On Mon, 4 Nov 2013, Jeff Law wrote:
You might also be referring to Greg McGary's work on bounded pointers, I don't
think that ever got integrated or if it did, it got pulled long ago.
It was integrated in 2000, removed in 2002/2003 (I removed the relics from
glibc earlier this year). By using fat pointers, it required the entire
program including all libraries it used to be built with bounded pointers
enabled (and associated changes to all assembly sources to handle them).
Yes, I was referring to Greg's work. I'm wondering if the trade-offs
have changed since then, considering that it's again en vogue to
bootstrap new architectures. It's difficult to tell without more
details about that past effort, though.
--
Florian Weimer / Red Hat Product Security Team
