[Qemu-devel] Fwd: Re: Raspberry ARM with 32-bit guest

[Qemu-devel] Fwd: Re: Raspberry ARM with 32-bit guest

[Benito]

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Ok , I do have a qemu-system-i386 :

pi@raspberrypi / $ qemu-system-i386 --version
QEMU emulator version 1.1.2 (Debian 1.1.2+dfsg-6a), Copyright (c) 
2003-2008 Fabrice Bellard

My intention is to run an old application , that used to run on 
FedoraCore2,also a modified version of the app runs on Centos 5.1/6.3 
also Fedora 14 .
The problem lies with glibc. The glibc in newer kernels  , is backwards 
compatible up to a certain point, but not far enough. The version I 
require is GLIBC.2.0
also, the app never ran on debian , always fedora/Red hat and Centos  , 
hence the emulation of i386 on ARM. So it requires ld-linux.so.2 , 
libc.so.6 and so on.

The RPM Package for glibc-2.12.90-1mgc25.i686.rpm , is the package for 
fc14. - in the /lib directory of FC14 :

[root@mdr lib]# ls -al libc.so.6
lrwxrwxrwx. 1 root root 15 Oct 22  2010 libc.so.6 -> libc-2.12.90.so

Now there are only a few of these libraries, like /lib/ld-linux.so.2  
/lib/libm.so.6 that are needed to run.
Do you mean there's a possibility that I'd be able to run the libraries, 
via the qemu-i386  and
manage to get the app working? Also should i try and use 
qemu-system-i386 and try it the same way I did with only qemu?

I have a Model B pi, 512 MB RAM ,Disk space : rootfs 3.6G  2.0G  1.5G  
57% /  (the puppy iso is 130 MB , the centos one is +- 300 ) This should 
suffice right ?

Thank you so much for your response
Regards

> Hi,
>
> Am 04.04.2013 13:06, schrieb Benito:
>> I know this might absurd, but
>> I'm trying to run a 32-bit guest on a Raspberry Pi - Raspbian OS -
>> Debian Wheezy ARM
>> I have used :
>>
>> qemu-img create -f raw harddrive.raw 700M
>> qemu -hda harddrive.raw -cdrom fedora14.iso
>>
>> I've installed qemu via apt-get install qemu on the Pi.
> You're not providing sufficient details for the upstream community to
> help you, so CC'ing the Debian maintainer. "qemu" sounds rather old,
> it's qemu-system-i386 since several versions already.
>
> Did you check that you have sufficient RAM on your Raspi? Or disk space
> on your SD card / USB disk? Disk images are created sparse, and when the
> host runs out of resources lots of things can happen.
>
>> After I do the 2nd command, the guest os starts up , but soon consumes
>> 100% cpu , and then hangs. Tried with puppy 511 , centos6.3 minimal ,
>> fedora14
>>
>> Is there a way to run any of these in "invisible" mode or user mode ,
>> and get past this obstacle.. ?
> qemu-i386 can execute individual Linux binaries, with a bunch of known
> issues. Might or might not work for you - you don't say what you
> actually want to do.
>
>> Can I create this guest on a faster machine , and clone itto the Pi's
>> qemu that runs ARM ?
> Yes. The disk image is just a file.
>
> Regards,
> Andreas
>
>> Also am I missing something regarding the creation of the guest? I don't
>> need a GUI for the guest, just need to be able to get to it and execute
>> commands.
>> Please could someone point me in the right direction ?
>>
>> Kind Regards
>> Benito




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Re: [Qemu-devel] Fwd: Re: Raspberry ARM with 32-bit guest

[Peter Maydell]

On 4 April 2013 15:06, Benito <benito@itcsnam.com> wrote:
> Do you mean there's a possibility that I'd be able to run the libraries, via
> the qemu-i386  and manage to get the app working?

This depends. If your application doesn't use fork() and doesn't
use multiple threads then you may have a reasonable chance.
Otherwise, probably not.

-- PMM