Request Help with NFS Client Test

[Joel Sherrill]

Joel Sherrill wrote:
>> In order to make the information provided more useful
>> you should:
>>
>> a) change your BSP so it produces a stack trace
>>     from the exception handler (try
>>     libcpu/powerpc/shared/src/stack.c: CPU_print_stack())
>>
>> b) post your binary (elf file) along with the register
>>     and stack dump.
>>
>>   
>>     
> Wouldn't it be easier to run my test and see if
> it works for you with the NFS mounts changed
> or is horribly broken?
>
> The back track shows it is a NULL jump in the
> network driver. 
>
> 0x00053EA8--> 0x0004E080--> 0x0004E164--> 0x00000006--> 0x0004B5D8
> 0x0004C2E0--> 0x00069458--> 0x00098A24--> 0x0009899C
>
> 0x00053EA8--> CPU_print_stack
> 0x0004E080--> C_exception_handler
> 0x0004E164--> push_normalized_frame
> 0x00000006--> ?????
> 0x0004B5D8--> mpc5200_eth_mii_read
> 0x0004C2E0--> mpc5200_fec_txDaemon
> 0x00069458--> soconnsleep
> 0x00098A24--> _Thread_Handler
> 0x0009899C--> _Thread_Handler
>
> Thomas .. can you try this test on your hardware.  I
> will commit the NFS client test to the network demos
> and hopefully you can track it down.
>   
Doesn't crash on qemu.  I can't mount a filesystem
on the host OS yet but I suspect that I need to
add a route. 

Till could you try to get this working on qemu and
see what magic I am missing?  I have to be close.

Please.

>> That said -- looking at your source code it seems
>> that (at least on the 4.7 branch) using a NULL pointer
>> for the first argument to RTEMS 'mount' is illegal.
>>   
>>     
> I saw your comment (gripe?) in the README
> and fixed it Friday in CVS.  :)
>   
>> You could also use the convenience wrapper 'nfsMount()'
>> which does a DNS lookup (non thread-safe gethostbyname!)
>> and creates a mount-point (not nested directories, though)
>> if necessary:
>>
>> nfsMount("server","/export","/home")
>>
>> both methods are explained in the rtemsNFS README.
>>   
>>     
> I was trying hard to follow that to create
> the example. 
>
> I tried the nfsMount call and it didn't even change
> the behavior.  Maybe this is just tripping a bug in
> the NIC driver. <sigh>
>
> I am going to try this on another BSP and see what happens.
>
> --joel
>   
>> HTH
>> T.
>>     
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