Re: UVM and the NULL page

To: David Holland <dholland-tech%netbsd.org@localhost>
Subject: Re: UVM and the NULL page
From: coypu%SDF.ORG@localhost
Date: Tue, 27 Dec 2016 16:23:12 +0000

On Tue, Dec 27, 2016 at 03:26:04PM +0000, David Holland wrote:
> Userspace memory shouldn't have supervisor execute permission anyway,
> although I suppose x86 can't represent that.
> 

Not all x86, but newer CPUs have SMEP/SMAP which do that.

References:
- Re: UVM and the NULL page
  - From: Maxime Villard
- Re: UVM and the NULL page
  - From: Joerg Sonnenberger
- Re: UVM and the NULL page
  - From: Paul Goyette
- Re: UVM and the NULL page
  - From: Wolfgang Solfrank
- Re: UVM and the NULL page
  - From: Maxime Villard
- Re: UVM and the NULL page
  - From: Thor Lancelot Simon
- Re: UVM and the NULL page
  - From: Eduardo Horvath
- Re: UVM and the NULL page
  - From: David Laight
- Re: UVM and the NULL page
  - From: Mouse
- Re: UVM and the NULL page
  - From: David Holland

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