Re: [Qemu-devel] Re: PC traces from QEMU

["Shashidhar Mysore" <shashimc@gmail.com>]

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Hi Antti,

Thanks for the reply. Honestly, I am new to QEMU, hence I just tried
following the steps you had mentioned to extract PCs without actually
knowing what each of those mean.

As you had said,
- I defined DEBUG_EXEC in cpu-exec.c
- I disabled USE_DIRECT_JUMP in exec-all.h
- I disabled USE_CODE_COPY in target-i386/cpu.h
- I hardcoded force_dc->jmp_opt to equal zero in target-i386/translate.c
(force_dc->jmp_opt = 0;)

However, when I try to make the qemu-0.9.0 that I have, I get the following
error -

##########################################################
$ make
....
/qemu-0.9.0-trial/target-i386/translate.c
/qemu-0.9.0-trial/target-i386/translate.c: In function `gen_goto _tb':
/qemu-0.9.0-trial/target-i386/translate.c:1766: error: too many arguments to
function `gen_op_goto_tb0'
/qemu-0.9.0-trial/target-i386/translate.c:1768: error: too many arguments to
function `gen_op_goto_tb1'
make[1]: *** [translate.o] Error 1
make[1]: Leaving directory `/qemu-0.9.0-trial/i386-linux-user'
make: *** [subdir-i386-linux-user] Error 2

######################################################

Do you know if I'm doing something wrong here? Also, since qemu-0.7 doesn't
seem to be available for download from the qemu webpage, I couldn't try the
same with qemu-0.7. I appreciate your help on this.

Thanks,
-Shashi.

On 3/29/07, Antti P Miettinen <ananaza@iki.fi> wrote:
>
> "Shashidhar Mysore" <shashimc@gmail.com> writes:
> > I intend to extract program counter streams from QEMU as a program
> executes.
> > Can you please point me to the hooks that I may have to insert into the
> QEMU
> > source code in order to extract the PC values?
>
> I used to do that with qemu 0.7. I did not dig into this deep enough
> to find the minimal changes but at least the following was enough:
> - define DEBUG_EXEC in cpu-exec.c
> - disable USE_DIRECT_JUMP in exec-all.h
> - disable USE_CODE_COPY in target-i386/cpu.h
> - force dc->jmp_opt to zero in target-i386/translate.c
> Would be nice if enabling PC traces were possible with e.g. command
> line (maybe requiring config time enable would be good too :-)
>
> --
> http://www.iki.fi/~ananaza/
>
>
>
>

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