RTEMS crash with error 18 (RTEMS_CALLED_FROM_ISR) again.

[Joel Sherrill]

On 02/17/2010 03:39 PM, Nick Thomas wrote:
>
>    
>>>        
>> Hmmm... in 4.7.x, it is possible that the stack checker is using printf
>> which would be trying to lock a mutex.  It was changed to printk() some
>> time past that point. Do you have stack checking on?
>>      
> No, stack checking off.
>
> I also see that irq_stub.S is where the _ISR_Nest_level and
> _Thread_Dispatch_disable_level is incremented/decremented.
> This is PowerPC specific, is there a known bug in this code for 4.7.1?
>
>    
If it is it would be specific to that implementation.  Where is
that in the source?  Can you compare it to another BSP?  For
flow, I would look at what motorola_shared is using.  We know
that worked for 4.7.x.
> There are some compiler conditionals in there, like PPC_USE_SPRG and
> PPC_USE_DATA_CACHE. Not sure which of those is used in my system. I will
> look through the assembly code :~ .
>
>    
If PPC_USE_SPRG is not in sync throughout the IRQ code and
cpukit code, then that would be a possible cause.
> Regards
>
> Nick
>
>    


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Joel Sherrill, Ph.D.             Director of Research&  Development
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