[Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Kenneth Johansson]

I'm trying to setup a debian root that I can chroot into for armel and
mips from an ubuntu 9.10 x86_64.

While I have it working for armel on a specific qemu the mips target is
more problematic. 

first both fail for qemu newer than
6173d56bdcb53389c54e803873e6bf8f87836a4f.

doing /sbin/ldconfig. I get "bad address"


now on to mips. during installation of debian I get the following error,

/bin/tar: ./postinst: Cannot utime: Level 2 not synchronized

now I guess what is really happening is that my x86_64 kernel is
returning ENOSYS and that maps to the mostly unused EL2NSYNC on mips. 

arch/mips/include/asm/errno.h:#define   EL2NSYNC        38      /* Level 2 not synchronized */
include/asm-generic/errno.h:#define     EL2NSYNC        45      /* Level 2 not synchronized */
include/asm-generic/errno.h:#define     ENOSYS          38      /* Function not implemented */

Is there anything that can be done to fix this ??
I do not know what syscall this is happening on :(

Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Lisandro Damián Nicanor Pérez Meyer]

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Hi! First of all, sorry for breaking the thread [0] (although it is too old 
maybe).

[0] <http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg00116.html>

As I have stumbled upon this bug, I would like to know if there is something I 
can do to try to help fixing it. I have never seen qemu's code and I am really 
a newbie to it, so any pointer would be higly appreciated.

Kinds regrads, Lisandro.


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Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Lisandro Damián Nicanor Pérez Meyer]

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On Vie 01 Jul 2011 14:46:05 Lisandro Damián Nicanor Pérez Meyer escribió:
> Hi! First of all, sorry for breaking the thread [0] (although it is too old
> maybe).
> 
> [0] <http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg00116.html>
> 
> As I have stumbled upon this bug, I would like to know if there is
> something I can do to try to help fixing it. I have never seen qemu's code
> and I am really a newbie to it, so any pointer would be higly appreciated.

I have clearly not been verbose enough, so I'll better try to solve that :-)

The problem is the following: once I create a chroot, I copy /usr/bin/qemu-
mips-static to $CHROOT/usr/bin and then chroot $CHROOT.

Now if I do run touch on any file, I get:

root@debian:/# touch tito
/usr/bin/touch: setting times of `tito': Level 2 not synchronized

Once again, any pointer to try to debug it would be highly appreciated.

Also I would like to thank josch who has been helping me a lot with this :-)

Kinds regards, Lisandro.

-- 
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Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[riku voipio]

On 07/02/2011 02:52 AM, Lisandro Damián Nicanor Pérez Meyer wrote:
> I have clearly not been verbose enough, so I'll better try to solve that :-)
>
> The problem is the following: once I create a chroot, I copy /usr/bin/qemu-
> mips-static to $CHROOT/usr/bin and then chroot $CHROOT.
>
> Now if I do run touch on any file, I get:
>
> root@debian:/# touch tito
> /usr/bin/touch: setting times of `tito': Level 2 not synchronized
>
> Once again, any pointer to try to debug it would be highly appreciated.

You can run /usr/bin/qemu-mips-static -strace /bin/touch tito to see 
what syscall are being run, and what gives the level2 error.

Some basic details should also be provided for good bugreport:

1. version of qemu being used (a release or latest git?)
2. host linux version (2.6.?)  and architecture (i386, x86_64, ?)
3. version of debian used to create chroot (lenny. squeeze, sid, ??)

Riku

Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Lisandro Damián Nicanor Pérez Meyer]

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On Lun 11 Jul 2011 10:45:27 riku voipio escribió:
> On 07/02/2011 02:52 AM, Lisandro Damián Nicanor Pérez Meyer wrote:
> > I have clearly not been verbose enough, so I'll better try to solve that
> > :-)
> > 
> > The problem is the following: once I create a chroot, I copy
> > /usr/bin/qemu- mips-static to $CHROOT/usr/bin and then chroot $CHROOT.
> > 
> > Now if I do run touch on any file, I get:
> > 
> > root@debian:/# touch tito
> > /usr/bin/touch: setting times of `tito': Level 2 not synchronized
> > 
> > Once again, any pointer to try to debug it would be highly appreciated.
> 
> You can run /usr/bin/qemu-mips-static -strace /bin/touch tito to see
> what syscall are being run, and what gives the level2 error.
> 
> Some basic details should also be provided for good bugreport:
> 
> 1. version of qemu being used (a release or latest git?)
> 2. host linux version (2.6.?)  and architecture (i386, x86_64, ?)
> 3. version of debian used to create chroot (lenny. squeeze, sid, ??)
> 
> Riku

Thanks Riku! This bug has already been solved by Wesley Terpstra:

<http://lists.nongnu.org/archive/html/qemu-devel/2011-07/msg00313.html>

I have patched the debian package, rebuilt and use it perfectly :-)

Kinds regards, Lisandro.

-- 
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Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Riku Voipio]

On Mon, Jul 11, 2011 at 11:10:50AM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:
> Thanks Riku! This bug has already been solved by Wesley Terpstra:
 
> <http://lists.nongnu.org/archive/html/qemu-devel/2011-07/msg00313.html>

Ok, I missed these patches. Will adjust the linux-user patchset to include
these patches if no bugs found in them.

Riku

Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Wesley W. Terpstra]

2011/7/11 Riku Voipio <riku.voipio@iki.fi>:
> On Mon, Jul 11, 2011 at 11:10:50AM -0300, Lisandro Damián Nicanor Pérez Meyer wrote:
>> Thanks Riku! This bug has already been solved by Wesley Terpstra:
>
>> <http://lists.nongnu.org/archive/html/qemu-devel/2011-07/msg00313.html>
>
> Ok, I missed these patches. Will adjust the linux-user patchset to include
> these patches if no bugs found in them.

Just a heads up---if you only use my original patch, mipseb still
won't be able to run 'make'.
My final patchset (sent as a series of 6 patches) resolves this in
addition to the other problems.

Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Lisandro Damián Nicanor Pérez Meyer]

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On Mar 12 Jul 2011 08:32:51 Wesley W. Terpstra escribió:
[snip] 
> Just a heads up---if you only use my original patch, mipseb still
> won't be able to run 'make'.
> My final patchset (sent as a series of 6 patches) resolves this in
> addition to the other problems.

And there you solved my last problem :-)

Thanks!

-- 
Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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Re: [Qemu-devel] qemu-user[armel/mips] and debian-rootfs

[Lisandro Damián Nicanor Pérez Meyer]

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On Mar 12 Jul 2011 11:23:40 riku voipio escribió:
> Hi Wesley
[snip] 
> For whatever reason I was unable to apply your patches directly, so I
> had to recreate them.
> 
> I've rolled your patches to:
> 
> http://git.linaro.org/gitweb?p=people/rikuvoipio/qemu.git;a=shortlog;h=refs
> /heads/linux-user-for-upstream

I have tested this by getting the source code, creating a Debian package as if 
it were a NMU of the last version in Sid (although with different sources, but 
fair enough for testing I guess) and I can say it works :-)

I have both been able to setup a rootfs for my Ubiquiti RouterStation Pro and 
also compiled some qt stuff in a chroot in my desktop :-)

Kinds regards, Lisandro.

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Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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