Re: [Qemu-devel] qemu-system-arm system support for big endian BE8

[sridhar kulkarni]

The issue is mostly related to my application under test. When the application calls a function the PC is getting set up to a wrong address, and then qemu crashes by displaying "floating point exception(core dumped)" message.

I am able to move ahead by resolving the issue. But interestingly whenever my app crashes it always displays the same "floating point exception" message. But I don't see any floating operations at the point code crashes. I don't see any dump of the processor registers also. It's always just a one line message as I described above.

Regards

Sridhar

On Thursday, September 24, 2015 8:23 AM, Peter Crosthwaite <address@hidden> wrote:

On Wed, Sep 23, 2015 at 8:41 AM, Peter Maydell <address@hidden> wrote:
> On 23 September 2015 at 03:48, sridhar kulkarni <address@hidden> wrote:
>> Hi Peter,
>>
>> I was able to progress well using the BE8 work in the branch that you
>> pointed out. I am experiencing floating point issue. The qemu just exits, by
>> putting a message that "floating point exception(core dumped)". I suppose
>> QEMU do support floating point operations. I heard about hard floating point
>> and soft floating point support. Is there any configuration option in QEMU
>> for floating point?
>
> QEMU's floating point support for ARM is good and known to work.
> If QEMU exits with a coredump then that is either:
>  * your test binary is dumping core due to a bug in your test
>    (assuming you're using linux-user mode)
>  * a bug in QEMU (unlikely but not impossible)
>
> If you can provide a reproducible test case we can have a look at it.
>

Yes, so the thing stopping me upstreaming this was a reasonable test.
Can I have a look at your reproducer?

Regards,

Peter

> thanks
> -- PMM