help: failed to use qemu

[Chris Johns]

PowerMan wrote:
> I do it as the follow steps:
> 1. download QEMU from  http://bellard.org/qemu/qemu-0.9.1-i386.tar.gz
> 2. install it
>     tar xfz qemu-0.9.1-i386.tar.gz -C /
> 3. download rtems floppy image from ftp server :
>     ftp://ftp.rtems.com/pub/rtems/qemu/i386-pc/rtems-boot.img
> 4. download ftp://ftp.rtems.com/pub/rtems/qemu/i386-pc/rtems-grub.cfg
>     and copy it to my root directory /
> 5. mkdir /capture
>    cp hello.exe /capture/capture.exe
> 6. run qemu
>     qemu -fda rtems-boot.img -boot a -hda /dev/sda
> 

Is /dev/sda a separate disk or your host's main disk ?

This would mean QEMU would see your whole disk. What if you specify a 
subdirectory to qemu rather than the whole disk. I cannot remember if this 
works on Linux.

> but the capture.exe (which is actually helloworld I build with 
> rtems-4.7.3) does not run as I excepted.
> This capture.exe could run on my host by modifying /boot/grub/menu.lst
> 
> I type the following commands in grub:
> grub> set root=(hd0,0)
> grub> set kernel=/capture/capture.exe
> grub> boot
> 
> then grub told me:  
> error: no loaded kernel
> 

There is a comment in the Wiki (http://www.rtems.org/wiki/index.php/QEMU) 
about (hd0,0) needing to be (hd0,1). I wonder if this should be changed. Also 
I see in the Wiki the commands are:

  grub> set root=(hd0,1)
  grub> multiboot (hd0,1)/capture/capture.exe
  grub> boot

Note the executable path includes the disk part. Do you have a file 
/capture/capture.exe on your host disk ?

The path above assumes you have provide the directory where the executable 
file can be found as a parameter to

> I type the following commands in grub:
> grub> set root=(hd0,0)
> grub> multiboot /capture/capture.exe
> 
> then grub told me:
> error: Couldn't open file
> 

Same as above.

> Could somebody help me?
> 
> My host is openSUSE 11.1, my disk information is:
> /dev/sda1              3091312    516528   2417752  18% /
> udev                    252876      5428    247448   3% /dev
> /dev/sda8              3605268    153972   3268160   5% /home
> /dev/sda7              1130540    221192    851920  21% /tmp
> /dev/sda9              6412052   3541120   2545216  59% /usr
> /dev/sda6              1130540    193556    879556  19% /var
> 
> I type the following commands in grub:
> grub> ls
> 
> then grub told me:
> (fd0) (hd0) (hd0,0) (hd0,4) (hd0,5) (hd0,6) (hd0,7) (hd0,8)
> 
> they didn't match my host disk partition number
> 

What do you see when you do:

   ls (hd0,0)
   ls (hd0,4)

etc ?

Regards
Chris