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Re: bswap,xadd and cmpxchg emulation on 386



On Mon, Apr 04, 2005 at 05:11:20PM +0200, Peter 'p2' De Schrijver wrote:
> http://thread.gmane.org/gmane.linux.kernel/205839 has the patch. Note
> that 486 stepping A processors have a wrong opcode for cmpxchg. This
> means emulation of cmpxchg is necessary for 486 stepping A as well. As
> to the security hole, either the patch needs some fixes (ie using get_user etc.)
> or a userland emulation hooking SIGILL needs to be implemented.

Yes, I think everyone involved is aware of that.  Are you volunteering to
implement this?

-- 
Steve Langasek
postmodern programmer

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