Re: [Qemu-devel] sparc64 linux-user status

["Alex Bennée" <alex.bennee@linaro.org>]

Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> writes:

> On 22/05/17 14:45, Alex Bennée wrote:
>
>> Hi,
>>
>> While looking at some of the docker cross-build patches I thought I'd
>> checkout if I could still bootstrap some Debian linux-user images. I
>> made some tweaks to allow debootstrap to bootstrap from Debian's ports
>> to see if I could get the SPARC64 file-system up and running:
>>
>>  https://github.com/stsquad/qemu/commits/docker/sparc64-linux-user
>>
>> However when I try to run it:
>>
>>   make docker-image-debian-sparc64-user V=1
>>
>> It fails:
>>
>>   Step 4 : RUN /debootstrap/debootstrap --second-stage
>>    ---> Running in 2241c809c19f
>>   *** longjmp causes uninitialized stack frame ***: /bin/sh terminated
>>   Illegal instruction (core dumped)
>>   *** longjmp causes uninitialized stack frame ***: /bin/sh terminated
>>   Illegal instruction (core dumped)
>>   *** longjmp causes uninitialized stack frame ***: /bin/sh terminated
>>   Illegal instruction (core dumped)
>>   I: Keyring file not available at /usr/share/keyrings/debian-archive-keyring.gpg; switching to https mirror https://deb.debian.org/debian
>>   W: Failure trying to run:  dpkg-deb -f /var/cache/apt/archives/dpkg_1.18.24_sparc64.deb Version
>>   W: See //debootstrap/debootstrap.log for details
>>   I: Installing core packages...
>>   W: Failure trying to run:  dpkg --force-depends --install /var/cache/apt/archives/base-passwd_3.5.43_sparc64.deb
>>   W: See //debootstrap/debootstrap.log for details
>>   Illegal instruction (core dumped)
>>   The command '/bin/sh -c /debootstrap/debootstrap --second-stage' returned a non-zero code: 132
>>
>> Although I can manually get the shell at least partially running:
>>
>>   14:43 last:125, alex@zen taken:25, git:docker/sparc64-linux-user, [/home/alex/lsrc/qemu/qemu.git]> docker run --rm -it 1084ed198b00 /bin/sh
>>   # uname -a
>>   [1] + Stopped (tty output)       uname -a
>>   # uname -a | cat
>>   [2] + Stopped (tty output)       uname -a | cat
>>   # echo "hello"
>>   hello
>>   #
>>
>> Bringing anything to the foreground hangs the window:
>>
>>   # fg
>>   uname -a | cat
>>   Linux 8cbf3e5e2234 4.4.0-78-generic #99-Ubuntu SMP Thu Apr 27 15:29:09 UTC 2017 sun4u GNU/Linux
>>   /bin/sh: 4: fg: Cannot set tty process group (Inappropriate ioctl for device)
>>   *** longjmp causes uninitialized stack frame ***: /bin/sh terminated
>>
>> Which makes me think it might be a linux-user bug rather than the main
>> translation. Is this a tested combination? Any idea what the bug could be?
>
> Hmmm interesting. I tend to spend my time working on the system
> emulation rather than linux-user section so to be honest it's not
> something I test on a regular basis.
>
> If you peek at the debian-sparc archives over the past year you'll see
> there have been various SPARC64 linker bugs that have been fixed that
> were causing corrupt binaries to be produced.
>
> I see above that you're using a 4.4.0-78 kernel whereas John Paul's
> latest ISO images are running 4.9.0-2 (and he's fairly good at getting
> patches into ports) so without looking in detail my first thoughts are
> that you could be trying to run older binaries affected by one or more
> linker bugs?

Hmm of course the kernel version relates to my host kernel. Could guest
code be dependant on reported kernel version? That seems a little risky
to me.

> From memory the latest binaries are being published to sid
> under debian-ports, but please do double-check against the debian-sparc
> archives...

OK I shall have a look.

>
>
> ATB,
>
> Mark.


--
Alex Bennée