Re: TCG IR extraction

[Alex Bennée]

Tom Clark <tsc288@gmail.com> writes:

> Hello,
>
> Thanks so much for reading this and I appreciate any and all time you put 
> into this.
>
> I'm a dev working on a project that's using QEMU as its basis. I'm interested 
> in extracting the IR representation of
> translation blocks, preferably at the instruction level, to do some
> analysis on it.

If you are purely interested in the instruction level you could look at
TCG plugins although they deliberately don't expose any of the details of the
underlying TCGOps.

> In various documentation around the web
> I see lots of references to textual examples of the IR so I assumed it would 
> be possible to extract it in byte format and
> convert to textual myself. 
>
> I've done a lot of digging in the source and found the code_gen_buffer and 
> determined that's where the IR generation is
> being written to, but I'm having trouble cross referencing DisasContext, etc, 
> with that global to actually identify individual
> lines of code. I'm also assuming there's some kind of framing going on, so I 
> don't think that I can even expect it to be a
> simple buffer of bytes.
>
> So my  - is this reasonable to even attempt, and if so, how would you go 
> about doing it?
>
> Regards,
> -T


-- 
Alex Bennée