Re: Immediate values

Arjan van de Ven
2009-09-25T10:15:21Z

On Fri, 25 Sep 2009 11:02:06 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> > Then, following your advice, kprobes should be re-designed to do a
> > stop_machine around the int3 breakpoint insertion ? And gdb
> > should be stopping all threads of a target process before inserting
> > a breakpoint. Therefore, I do not seem to be the only one confused
> > about Intel statement on this issue.
>
> 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.

specifically, using int3 *and then going back to the old value*.

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Arjan van de Ven Intel Open Source Technology Centre
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