Re: [PATCH -tip 0/4 V3] tracing: kprobe-based event tracer

Masami Hiramatsu
2009-04-01T20:50:49Z

Andi Kleen wrote:
> Masami Hiramatsu <mhiramat@redhat.com> writes:
>> I agreed. Fortunately, Jim Keniston and I wrote an x86 instruction
>> decoder :-) which has been made originally for uprobe andd kprobes
>> jump-optimizer.
>>
>> https://www.redhat.com/archives/utrace-devel/2009-March/msg00031.html
>
> An alternative would be to adapt the x86 interpreter in KVM.
> I thought for some time that that one should be available in
> a more generic form in a library.

As far as I can see, KVM's instruction emulator is incomplete
(it doesn't cover all instructions...) and aims to emulate
instructions, not to analyze (so I couldn't relay on it).

Anyway, I think making x86 interpreter in a library is a good idea.

Thank you,

>
> -Andi