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

[Shashidhar Mysore]

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 <address@hidden> wrote:

"Shashidhar Mysore" <address@hidden> 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 :-)

--
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