Kernel Initialized in iMX6

[Stefan Kalkowski]

Hi Chirag,

On 07/22/2014 02:51 PM, chirag garg wrote:
> Hi Stefan,
> 
> I am getting this error message:
> starting Kernel...
> Genode 14.05
> 
> Kernel Initialized
> int main( ) : --- create local services---
> PF in core thread ( core ) : ip=1003cc38 fault=1008
> failed to communicate with thread event
> 
> ??

The message means, it is a pagefault raised in core, at instruction
address 0x1003cc38, the address for which no translation could be found
is 0x1008. You'll have to inspect your resulting core-binary e.g. via
tools like 'objdump' to getting to know what is going wrong. Find out at
which point in the high-level code core is faulting by inspecting the
disassembled binary. You then might incorporate additional debug
printings at appropriated points around the faulting instruction to get
a deeper understanding about the root of the failure.

Regards
Stefan

> 
> 
> Regards
> 
> Chirag Garg
> IIT Madras , Rise Lab
> 
> 
> On Tue, Jul 22, 2014 at 2:52 PM, Stefan Kalkowski <
> stefan.kalkowski at ...1...> wrote:
> 
>> Hi Chirag,
>>
>> On 07/22/2014 10:54 AM, chirag garg wrote:
>>> Hi all.
>>>
>>> I am trying to port genode 14.05 on iMX6 board. As Aditya done this
>>> successfully for Genode 13.05. But Genode 14.05 is having so many changes
>>> from version 13.05. I am successfully able to build for iMx6 and it's
>>> creating uImage for "printf" script. But when i am running this uImage on
>>> the Board and its giving following messages :
>>>
>>>  starting Kernel...
>>> Genode 14.05
>>>
>>> Kernel Initialized
>>> int main( ) : --- create local services---
>>> failed to communicate with thread event
>>
>> That's looking good, at least you've already some initialization code
>> passed. The message "failed to communicate with thread event" might
>> imply that core triggered a pagefault, something which should never
>> happen normally, because virtual memory of core is translated eagerly,
>> and there is no pager resolving page-faults from core.
>>
>> Please try to apply this patch to your branch:
>>
>>
>>
>> https://github.com/skalk/genode/commit/89e296e3687b27a98d4cb1fa2787bf956feb5472
>>
>> In case that core provokes a pagefault, you'll get additional
>> information about the faulting address and instruction pointer of core,
>> so that you can find out the root cause of the problem.
>>
>> I think, it would be best to get this debugging helper into the mainline
>> repository.
>>
>>>
>>>
>>> Any idea How will I start kernel ? where should i look ??
>>
>> The kernel is already started, even core, the first, and primary
>> user-land process, is already running. Now, you've to bumble through
>> arising problems.
>>
>> Regards
>> Stefan
>>
>>>
>>>
>>> Regards
>>>
>>> Chirag Garg
>>> IIT Madras , Rise Lab
>>>
>>>
>>>
>>>
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>>
>> --
>> Stefan Kalkowski
>> Genode Labs
>>
>> http://www.genode-labs.com/ · http://genode.org/
>>
>>
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> 
> 
> 
> ------------------------------------------------------------------------------
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> search on Ohloh, the Black Duck Open Hub! Try it now.
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> 
> 
> 
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-- 
Stefan Kalkowski
Genode Labs

http://www.genode-labs.com/ · http://genode.org/