Get the output of a program in a file using QEmu

[Joel Sherrill]

Reng Zeng wrote:
> Hello,
>
> It do NOT work for me, I add "#define USE_COM1_AS_CONSOLE 1 " into my 
> init.c, and run qemu by
>      qemu -nographic -serial file:output.txt -boot a -m 128 -fda 
> myimage.img -hda fat:.
>
No.  That's not going to work.  You have to configure with that set on 
the configure
comment line.

..../configure ... USE_COM1_AS_CONSOLE=1 BSP_PRESS_KEY_FOR_RESET=0

The BSP_PRESS_KEY_FOR_RESET=0 configures the BSP to not wait for a key
press before resetting.  Just add  --no-reboot to your qemu command line and
it will "power down" which is exiting. :-D
> I did not get anything from output.txt. It run well in graphic mode, 
> but I want the output from the program.
>
> I would appreciate if you could shed me some light on my mind :)
This is a fragement from the shell script I use.

QEMU="/usr/local/bin/qemu -cpu 486"

runit()
{
  ARGS="-m 8 -boot a -fda ${fd0Image} -hda fat:${hd0Dir} \
         -monitor null -nographic -serial stdio --no-reboot"

    ${QEMU} ${ARGS} >${logfile} 2>&1 &
}
>
> Thanks,
> Alan
>
> 2008/3/21 Jean-Claude Grange <lebauce at free.fr <mailto:lebauce at free.fr>>:
>
>     Hello,
>
>     Thank you all for answers. USE_COM1_AS_CONSOLE =1 worked just fine.
>     I'm really interested in your patch, Joel. Are you going to commit it
>     soon ? Or would you mind sending your patch to me so that I can
>     test it.
>
>     Thanks
>     See you
>
>
>     Le 17 mars 08 à 19:47, Joel Sherrill a écrit :
>
>     > Jean-Claude Grange wrote:
>     >> Hello,
>     >>
>     >> Thanks for your answer. I'll try that.
>     >> But I wonder if it's possible to do it without modifying the
>     >> program ?
>     >>
>     >>
>     > Define USE_COM1_AS_CONSOLE =1 on the RTEMS configure
>     > command line and the console will move to the serial port.
>     > This is how I run RTEMS and GCC tests in an automated
>     > fashion.
>     >
>     > I discovered another nice qemu option --no-reboot which
>     > exits when the simulated PC does a reset.  This means you
>     > get a single run of the application and then it exits.  I have
>     > a pending patch in my tree to make the BSP reset on
>     > application exit or exception without waiting for a human
>     > to press a character.  This sped up the gcc test runs
>     > by a large factor since they have >50K tests.
>     >
>     > --joel
>     >> José Marinho <zemanel at gmail.com <mailto:zemanel at gmail.com>> wrote:
>     >>
>     >>
>     >>> you can allways create a file, format it to a specific fylesystem
>     >>> and pass
>     >>> it to qemu as an hard drive, and tell the rtems program to create
>     >>> and write
>     >>> in a file in that hard drive. and then you can mount that file
>     >>> with loop
>     >>> device and access it and get the output file. that's the approach
>     >>> that I'de
>     >>> take. Hope that's usefull to you
>     >>>
>     >>> José Marinho
>     >>>
>     >>> On 16/03/2008, Jean-Claude Grange <lebauce at free.fr
>     <mailto:lebauce at free.fr>> wrote:
>     >>>
>     >>>> Hello,
>     >>>>
>     >>>> I'm sorry if this is a stupid question but I've searched on the
>     >>>> mailing
>     >>>> list and
>     >>>> didn't find an answer.
>     >>>> I'm trying to get the output of a RTEMS program (for example the
>     >>>> Hello
>     >>>> from the
>     >>>> samples testsuite) using QEmu, into a file. I'm using the
>     >>>> command (on
>     >>>> Linux) :
>     >>>>
>     >>>> qemu -nographic -serial file:output.txt -boot a -fda myimage.img
>     >>>> -hda
>     >>>> fat:.
>     >>>>
>     >>>> but I don't get anything in the 'output.txt' file. I also tried -
>     >>>> serial
>     >>>> /dev/ttyS* and with the -monitor stdio option but I still have
>     >>>> nothing. I
>     >>>> must
>     >>>> be doing something wrong.
>     >>>>
>     >>>> I would really appreciate your help.
>     >>>> Thank you
>     >>>> _______________________________________________
>     >>>> rtems-users mailing list
>     >>>> rtems-users at rtems.com <mailto:rtems-users at rtems.com>
>     >>>> http://rtems.rtems.org/mailman/listinfo/rtems-users
>     >>>>
>     >>>>
>     >>>
>     >>> --
>     >>> <img> http://www.deec.uc.pt/common/img/deezoom.gif </img>
>     >>>
>     >>>
>     >>
>     >>
>     >> _______________________________________________
>     >> rtems-users mailing list
>     >> rtems-users at rtems.com <mailto:rtems-users at rtems.com>
>     >> http://rtems.rtems.org/mailman/listinfo/rtems-users
>     >>
>     >
>     >
>     > --
>     > Joel Sherrill, Ph.D.             Director of Research & Development
>     > joel.sherrill at OARcorp.com        On-Line Applications Research
>     > Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>     >   Support Available             (256) 722-9985
>     >
>     >
>
>     _______________________________________________
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>
>


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985