[oe] Remote Debugging

[FQ | Jaume Ribot]

Khem Raj escribió:
> On Sat, Jan 9, 2010 at 9:15 AM, Joerg Eesmann <jeesmann at gmx.de> wrote:
>   
>> Hi again,
>> sometimes one can`t see the obvious, but thanks for help.
>> I connected gdb remote. But I got following message:
>>
>> warning: The current binary is a PIE (Position Independent Executable),
>> which
>> GDB does NOT currently support.  Most debugger features will fail if
>> used
>> in this session.
>>
>> Reading symbols
>> from /home/joerg/prj/OpenMoko/shr/shr-build/shr-unstable/tmp/work/armv4t-oe-linux-gnueabi/bluez4-4.59-r5.0/bluez-4.59/src/.libs/bluetoothd...done.
>> (gdb) target remote 192.168.0.202:3333
>> Remote debugging using 192.168.0.202:3333
>> warning: Unable to find dynamic linker breakpoint function.
>> GDB will be unable to debug shared library initializers
>> and track explicitly loaded dynamic code.
>>
>> and I cannot set breakpoints or whatever.
>> I thought, gdb 7.0 is supporting PIE.
>> Is there any possibility to compile bluez4 not as PIE, would it work?
>>     
>
> you could add -nopie to ldflags
>
>   
>> While googeling, I found some patches for gdb, which may help.
>> Any ideas?
>>     
>
> they could if you send the pointers.
>
>   
>> (by the way, is there a usable graphical frontend for gdb for this case:
>> remote-debugging wit cross gdb)?
>>     
>
> I have used ddd its decent. You can also use eclipse CDT they are others too
> http://sourceware.org/gdb/wiki/GDB%20Front%20Ends
>   
I also used eclipse (galileo) with CDT extensions. It's a good idea, as
you can compile/debug the application with the same tool.

>   
>> I only managed to get it running (until the message) textbased.
>>
>> Thank you for supporting me,
>> best regards,
>> Joerg
>>
>>
>> On Fri, 2010-01-08 at 14:39 -0800, Khem Raj wrote:
>>     
>>> On (08/01/10 22:37), Joerg Eesmann wrote:
>>>       
>>>> Hi there,
>>>> I am trying to remote debug my Openmoko freerunner.
>>>> I already installed succesfully gdbserver, and can attach it to the
>>>> progem I am going to debug.
>>>> The question is, what to do on host side?
>>>> I bitbaked gdb-cross-sdk, I bitbaked my changed package (bluez4)
>>>> So I will install a debug version of the package, and attach to the
>>>> bluetoothd-demon.
>>>> On host side, I guessed I needed a gdb, that can handle ARM-processor,
>>>> therefore gdb-cross-sdk.
>>>> Now I should have everything... but a few questions left.
>>>> GDB ist only ipk-package, what to do with this?
>>>>         
>>> you need gdb-cross once you build that you should be able to use it
>>> from same place as cross gcc.
>>>
>>>       
>>>> Where do I find the arm-compiler bluetoothd on my host (I guess in work,
>>>> but will this be the strippded version or not, because also stripped
>>>> package has been made).
>>>> Am I on the right way? Is there any howto or something like that
>>>> availlable, where you could point me?
>>>>
>>>>         
>>> if you build it then the non stripped version should be there in
>>> your workdir (where the package was built)
>>>
>>> -Khem
>>>       
>>>> thank you for your help in advance,
>>>> best regards,
>>>> Joerg
>>>>
>>>>
>>>>
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>>>>         
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>>>       
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>>     
>
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>   


-- 
Jaume Ribot Caner
R&D Engineer

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