[Qemu-devel] [Bug 1625295] [NEW] qemu-arm dies with libarmmem inside ld.so.preload

[Qemu-devel] [Bug 1625295] [NEW] qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Public bug reported:

When running raspbian inside qemu,the user has to first comment out the
following line from /etc/ld.so.conf:

/usr/lib/arm-linux-gnueabihf/libarmmem.so


Will future qemus will be able to work without changine /etc/ld.so.conf ?

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

Which version of QEMU are you using? This is I think due to SETEND
emulation, which I thought we had implemented now.

If this still doesn't work on QEMU 2.7, please can you provide full
instructions to reproduce the problem (assume I know nothing about how
to get raspbian or run it on QEMU).

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

- I'm on Ubuntu 16.04, and it looks like it's 2.6.1

qemu-arm version 2.6.1 (Debian 1:2.6.1+dfsg-0~16.04), Copyright (c)
2003-2008 Fabrice Bellard

Is there a PPA for qemu 2.7 somewhere ?


On 19 September 2016 at 21:27, Peter Maydell <peter.maydell@linaro.org>
wrote:

> Which version of QEMU are you using? This is I think due to SETEND
> emulation, which I thought we had implemented now.
>
> If this still doesn't work on QEMU 2.7, please can you provide full
> instructions to reproduce the problem (assume I know nothing about how
> to get raspbian or run it on QEMU).
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1625295
>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1625295/+subscriptions
>

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

On 20 September 2016 at 00:02, Stu <stu.axon@gmail.com> wrote:
> - I'm on Ubuntu 16.04, and it looks like it's 2.6.1
>
> qemu-arm version 2.6.1 (Debian 1:2.6.1+dfsg-0~16.04), Copyright (c)
> 2003-2008 Fabrice Bellard
>
> Is there a PPA for qemu 2.7 somewhere ?

You'd need to ask the Ubuntu folks about that. Upstream
we provide source code distributions only.

thanks
-- PMM

Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Cheers :)

May as well close this, I'll re-open it if I try 2.7 and find the same
bug.

Testing involves trying stock raspbian in qemu.


On 20 September 2016 at 10:26, Peter Maydell <peter.maydell@linaro.org>
wrote:

> On 20 September 2016 at 00:02, Stu <stu.axon@gmail.com> wrote:
> > - I'm on Ubuntu 16.04, and it looks like it's 2.6.1
> >
> > qemu-arm version 2.6.1 (Debian 1:2.6.1+dfsg-0~16.04), Copyright (c)
> > 2003-2008 Fabrice Bellard
> >
> > Is there a PPA for qemu 2.7 somewhere ?
>
> You'd need to ask the Ubuntu folks about that. Upstream
> we provide source code distributions only.
>
> thanks
> -- PMM
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1625295
>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
> To manage notifications about this bug go to:
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>

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

As I say, for providing reproduction instructions you have to assume I
know nothing about raspbian, so "trying stock raspbian in qemu" is not
detailed enough. I was looking for details more like "download this
particular image from this website and then run this specific QEMU
commandline, and then in the guest do <this thing> and it fails in <this
way>".

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Are bash scripts OK ?


I put everything into some scripts - I'm on ubuntu, debian should be
similar - not sure about other platforms.


# Grab scripts
$ git clone https://github.com/stuaxo/raspbian-qemu-scripts
$ cd raspbian-qemu-scripts

# Download current raspbian lite to /tmp/raspbian:
$ ./download-raspbian.sh



# Test that may fail - run
/tmp/raspbian/2016-05-27-raspbian-jessie-lite.img in qemu:
$ ./run_qemu.sh


# If the above fails, then it's you can edit /etc/ld.so.preload ---
$ ./mount-raspbian.sh

^ mounts the image to /tmp/raspbian/

Now edit the file  /tmp/raspbian/etc/ld.so.preload  and comment any lines,
e.g

$ sudo nano -w /tmp/raspbian/mnt/etc/ld.so.preload

$ umount /tmp/raspbian

## Test again in qemu

$ ./run_qemu.sh


One I get do the edit, qemu works for me.
To get chroot working, one has to mount the image and copy the file

$ ./mount-raspbian.sh
$ sudo cp /usr/bin/qemu-arm-static /tmp/raspbian/mnt/usr/bin

# After that chroot works...
$ sudo chroot /tmp/raspbian/mnt

-- Remember to umount the image before using qemu + but mount for chroot
:)






On 20 September 2016 at 11:22, Peter Maydell <peter.maydell@linaro.org>
wrote:

> As I say, for providing reproduction instructions you have to assume I
> know nothing about raspbian, so "trying stock raspbian in qemu" is not
> detailed enough. I was looking for details more like "download this
> particular image from this website and then run this specific QEMU
> commandline, and then in the guest do <this thing> and it fails in <this
> way>".
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1625295
>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1625295/+subscriptions
>

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

Thanks. I can reproduce this with the current QEMU, so there is still a
problem of some kind here.

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Awesome, cheers :)

On 20 September 2016 at 14:29, Peter Maydell <peter.maydell@linaro.org>
wrote:

> Thanks. I can reproduce this with the current QEMU, so there is still a
> problem of some kind here.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1625295
>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1625295/+subscriptions
>

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

This turns out to be nothing to do with setend. We're doing something wrong emulating the following nasty hack:
https://github.com/bavison/arm-mem/blob/master/architecture.S

.arm
architecture:
        sub     pc, pc, #1  @ is an interworking branch on ARMv7, not ARMv6
        and     a1, a4, a1  @ second word interpreted as 'B .+0xA' if Thumb
        mov     a1, #6
        bx      lr
.thumb
        mov     a1, #7
        bx      lr

so after the 'sub pc, pc, #1' (which in my debug trace is at address
0xb6f086dc) QEMU next tries to execute from 0xb6f086e2 in ARM mode,
which is neither of the two expected outcomes. As it happens we hit an
undefined instruction pretty much immediately afterwards:

0xb6f086e2:  0006e003      andeq        lr, r6, r3
0xb6f086e6:  ff1ee3a0      undefined instruction 0xff1ee3a0

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  New

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

Patch which fixes this: http://patchwork.ozlabs.org/patch/672288/


** Changed in: qemu
       Status: New => In Progress

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  In Progress

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

Now fixed in QEMU master, commit 9b6a3ea7a69959416.


** Changed in: qemu
       Status: In Progress => Fix Committed

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Committed

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Awesome, thanks :)

On 4 October 2016 at 15:55, Peter Maydell <peter.maydell@linaro.org>
wrote:

> Now fixed in QEMU master, commit 9b6a3ea7a69959416.
>
>
> ** Changed in: qemu
>        Status: In Progress => Fix Committed
>
> --
> You received this bug notification because you are subscribed to the bug
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>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Committed

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Quick followup on this, finally got the time to build this + can
confirming I can boot raspbian with the default /etc/ld.so.conf to the
command prompt (both raspbian jessie lite and the default distro).

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Committed

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Peter Maydell]

NB that commit 9b6a3ea7a69959416 had a bug (it broke exception return to
Thumb code), so you should also make sure you have commit fb0e8e79a9d77
which fixes that bug.

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Committed

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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Re: [Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Stu]

Yup, got it - cheers :)

On 20 October 2016 at 08:41, Peter Maydell <peter.maydell@linaro.org>
wrote:

> NB that commit 9b6a3ea7a69959416 had a bug (it broke exception return to
> Thumb code), so you should also make sure you have commit fb0e8e79a9d77
> which fixes that bug.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1625295
>
> Title:
>   qemu-arm dies with libarmmem inside ld.so.preload
>
> To manage notifications about this bug go to:
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>

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Committed

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

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[Qemu-devel] [Bug 1625295] Re: qemu-arm dies with libarmmem inside ld.so.preload

[Thomas Huth]

Released with version 2.8

** Changed in: qemu
       Status: Fix Committed => Fix Released

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Title:
  qemu-arm dies with libarmmem inside ld.so.preload

Status in QEMU:
  Fix Released

Bug description:
  When running raspbian inside qemu,the user has to first comment out
  the following line from /etc/ld.so.conf:

  /usr/lib/arm-linux-gnueabihf/libarmmem.so

  
  Will future qemus will be able to work without changine /etc/ld.so.conf ?

To manage notifications about this bug go to:
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