RE: Initial process CPU state was Re: SSE related security hole

[Bill Davidsen]

On Tue, 23 Apr 2002, Saxena, Sunil wrote:

> The correct sequence for initializing MMX/SSE/SSE2 CPU state (I exchanged
> mail with Linus) is:
> 
> 	memset(&fxsave, 0, sizeof(struct i387_fxsave_struct));
> 	fxsave.cwd = 0x37f;
> 	fxsave.mxcsr = 0x1f80;
> 
> 	fxrstor(&fxsave);
> 
> The above is architectural feature and you can expect this to work in the
> future.   Intel will work to document this in our Monthly Specification
> Updates and update "IA-32 Intel(R) Architecture Software Developer Manual"s.

Sure is nice to see some vendor support!

-- 
bill davidsen <[e-mail]>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.