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Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to")
From: |
Marcus Sundman |
Subject: |
Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to") |
Date: |
Thu, 8 Jul 2004 04:19:56 +0300 |
User-agent: |
KMail/1.6.2 |
> The VM-level stuff we're talking about is just the idea of building in
> additional protection at the VM-level in a form that resembled
> privilege levels on a real CPU --- just a flag that certain primitives
> can check to decide between running normally and signalling an error.
If you want a good base for different kinds of security I think the only
solution (currently known to mankind) is to support capability-based
security. You can build any kind of security system on top of capabilities,
but you can't build capabilities on top of inherently insecure systems such
as ACLs. (Capability-based security requires support for "unforgeable"
pointers (or similar), though, which means that programs can't see all code
as writable data.)
- Marcus Sundman
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), (continued)
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Robert Collins, 2004/07/06
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Jeremy Shaw, 2004/07/06
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Anselm Lingnau, 2004/07/07
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Tom Lord, 2004/07/07
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Andrew Suffield, 2004/07/07
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Tom Lord, 2004/07/07
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"),
Marcus Sundman <=
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), James Blackwell, 2004/07/12
- [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Stefan Monnier, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Stéphane Payrard, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), James Blackwell, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Samium Gromoff, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), John Meinel, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Stephen J. Turnbull, 2004/07/13
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), James Blackwell, 2004/07/12
- Re: [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Samium Gromoff, 2004/07/12
- [Gnu-arch-users] Re: arch roadmap 1 (and "what's tom up to"), Miles Bader, 2004/07/12