[PATCH] Allow exec on 32-bit from readable, non-exec pages, with a warning.

Linas Vepstas linas at austin.ibm.com
Tue Jul 10 07:29:26 EST 2007


On Mon, Jul 09, 2007 at 04:16:40PM -0500, Scott Wood wrote:
> Arnd Bergmann wrote:
> > I may be missing the obvious, but doesn't that defeat the purpose of
> > non-executable mappings?
> 
> The hardware in question doesn't support non-executable mappings; 
> otherwise, it'd never have worked in the first place.  Note that this is 
> only allowed on 32-bit, non-book-E.
> 
> There isn't much value in enforcing non-exec mappings only if it happens 
> to be the first fault on a given page.

Thank you. I was reading this thread last week, and scratching my head,
thinking wtf ??

--linas



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