Re: [Qemu-devel] [Bug 1316115] [NEW] linux-user qemu-arm NEON support

[Peter Maydell]

On 5 May 2014 13:09, Christopher Horler <address@hidden> wrote:
> Public bug reported:
>
> I was reading the mailing list and saw NEON support in QEmu was making
> progress.
>
> Is it not supported in user mode?  or am I running into something else
> here?  (I've tried to include some what may be useful information)

Neon in the 32-bit CPUs has been supported for several releases now;
what you're seeing is probably something else.

> using qemu from git (last commits as below):
> fdaad47 Merge remote-tracking branch 
> 'remotes/pmaydell/tags/pull-target-arm-20140501' into staging
> e50bf23 Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into 
> staging
> c090c10 Merge remote-tracking branch 'remotes/cohuck/tags/kvm_cap_helpers' 
> into staging
>
> (for completeness I should point out this is not actually
> libQtCore.so.4.6.2 - the SONAME shows libQt5Core.so.5).
>
> address@hidden:~/projects/src/CustomFirmware> qemu-arm -L ./root 
> ./root/usr/local/Trolltech/QtEmbedded-4.6.2-arm/lib/libQtCore.so.4.6.2

Are you trying to execute a DLL on purpose?

> qemu: unhandled CPU exception 0x2 - aborting
> R00=00000000 R01=f6c84fdd R02=00000000 R03=00000000
> R04=00000000 R05=00000000 R06=00000000 R07=00000000
> R08=00000000 R09=00000000 R10=f6ff9d80 R11=00000000
> R12=00000000 R13=f6c84d90 R14=00000000 R15=f6cdef74
> PSR=00000010 ---- A usr32
> qemu: uncaught target signal 6 (Aborted) - core dumped
> Aborted

This means your guest program tried to execute an SWI
instruction which didn't have a sensible immediate value
in it to be a Linux system call. This seems to me to be
likely because we're trying to execute garbage because
you've tried to execute a DLL rather than an executable.

thanks
-- PMM