Re: Immediate values

Richard J Moore
2009-09-25T10:18:16Z

Alan Cox <alan@lxorguk.ukuu.org.uk> wrote on 25/09/2009 11:02:06:

>
> There was considerable discussion abut this when the kprobe stuff went
> in. If I remember rightly it was stated by someone @intel.com then that
> int3 was ok (even though its not strictly documented as such). The same
> is not true for all instructions on all x86 processors unfortunately.
>
> Alan

Alan, I had that discussion with Intel, and yes int3 is a special case
because of the interrupt processing associated with it. The discussion
went along this lines: int3 is practically useless in an MP environment
if it's trouble by the cross-modifying erratum.

I suppose it is possible the more recent microarchitectures have
changed things. And yes, we might need to have that conversation again.

Richard