On Mon, Oct 17, 2011 at 6:29 PM, Anthony Liguori <anth...@codemonkey.ws> wrote: > 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.
Disassembly could be moved offline, so performance would also be better and *_asm generation could be toggled dynamically. > Regards, > > Anthony Liguori > >> Regards, >> Stefan Weil >> >> > > >
