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
