Re: [Qemu-devel] GPLv3 troubles

[Anthony Liguori]

On 10/17/2011 01:20 PM, Stefan Weil wrote:
> Am 17.10.2011 20:16, schrieb Anthony Liguori:
> > On 10/17/2011 12:58 PM, Andreas Färber wrote:
> > > Am 17.10.2011 18:51, schrieb Anthony Liguori:
> > > > Including binutils code is just a bad idea.
> > >
> > > Do you see a real alternative? Would it be possible to pipe machine code
> > > from QEMU into an external disassembler?
> >
> > Sure. This is only used in the monitor for interactive debugging, right?
>
> The disassembler is also used with -d in_asm or -d out_asm to write qemu.log.
> I expect that a pipe to an external disassembler would slow down execution with 
> -d
> significantly.

How difficult would it be to add tracing to tcg-target.c such that you could get 
out_asm that way?

At least with i386, there's just a few instruction forms so it should just be a 
matter of a few trace points with a table of opcode names.

Likewise, we could add tracing to translate.c to achieve the same affect as 
in_asm.

Tracing's probably a far better approach for debugging as you would be able to 
do some very interesting things with SystemTap and such a mechanism.

Regards,

Anthony Liguori

> Regards,
> Stefan Weil