Bugtraq mailing list archives
Re: http://www.smashguard.org
From: Nicholas Weaver <nweaver () CS berkeley edu>
Date: Fri, 30 Apr 2004 19:12:56 -0700
On Fri, Apr 30, 2004 at 01:29:21AM +0200, Pavel Machek composed:
Well.. they are not really separate bits. If they was, you'd have ---, --x, r--, r-x. You can't have --x combination (which is sad for the emulators). I believe that on most sane architectures (m68k at least), you can have all 4 combinations.
Silly confusion time: The key is good separation of WRITE and EXECUTE. Far too many CPUs don't have separate TLB bits for writeable and executable. -- Nicholas C. Weaver nweaver () cs berkeley edu
Current thread:
- Re: http://www.smashguard.org Pavel Machek (Apr 30)
- Re: http://www.smashguard.org Crispin Cowan (Apr 30)
- Re: http://www.smashguard.org Pavel Machek (Apr 30)
- Re: http://www.smashguard.org Nicholas Weaver (May 01)
- Re: http://www.smashguard.org Theo de Raadt (May 01)
- Re: http://www.smashguard.org Pavel Machek (Apr 30)
- Re: http://www.smashguard.org Coleman Kane (May 01)
- Re: http://www.smashguard.org Theo de Raadt (May 01)
- Re: http://www.smashguard.org Crispin Cowan (Apr 30)