[LLVMdev] ARM Debug support patch

[Evan Cheng]

On Dec 11, 2008, at 8:23 AM, Mike-1 wrote:

>
> Thanks for the commit.
>
> FlexyCore works only on ARM EABI Linux target for now. This binary  
> with
> Dwarf information could be debugged with a gdb-server 6.8 without  
> problem on
> our side.

Good to hear. Are you able to examine aggregates?

>
>
> If you are working on ARM Linux target, could you send us LLVM  
> source file,
> and gdb version ? But if you are using ARM Darwin as Anton suggest,  
> we are
> unable to test this for now.
>
> We are open to help on this target, but we need some help to  
> efficiently
> setup the right Darwin platform (pre-compile binary platform, qemu,  
> boards
> ???).

I am not sure how to build llvm-gcc with Mac OS X / arm support using  
the open sourced llvm-gcc tree. It would be nice if someone can figure  
that out and post instructions. I would very like to see qemu support  
as well. I know Greg is also interested in this. Greg, any ideas?

>
>
> Do not hesitate to contact us directly by mail on this topic.

Thanks,

Evan

>
>
> Thanks,
>
> Mike.
>
>
> Evan Cheng wrote:
>>
>> I've committed the patch with some fixes. It allows ARM target to
>> generate Dwarf information. However, I did not have much luck
>> debugging llvm produced executables. I would appreciate it very much
>> if you can put the debug support to test and contribute more patches.
>>
>> Thanks,
>>
>> Evan
>>
>> On Dec 10, 2008, at 8:38 AM, Mike-1 wrote:
>>
>>>
>>> Hi all,
>>>
>>> FlexyCore, the company I am working for, use LLVM to generate binary
>>> for ARM
>>> platform. We are very fulfilled with LLVM, and FlexyCore will be
>>> pleased to
>>> contribute on this software.
>>>
>>>
>>> We need debug support in ARM binary, but, in LLVM 2.4, this support
>>> is not
>>> activated for ARM backend. Consequently, I made small modifications
>>> in order
>>> to activate it (see the patch in attach file). My experience is not
>>> enough
>>> on LLVM to know if it is the right way to solve the problem. But  
>>> these
>>> modifications work on our use cases.
>>>
>>>
>>>
>>> Could you help us in order to check if these modifications are
>>> corrects or
>>> not ? If it is not the right way, could you explain us how to solve
>>> this
>>> problem in the correct way, and we will be pleased to re-submit
>>> patch on
>>> this issue.
>>>
>>> I also use 'make check' command in order to verify that
>>> modifications does
>>> not generate regressions.
>>> Results are:
>>>
>>>   * Without ARM debug support
>>>     ===  Summary ===
>>>     # of expected passes        2726
>>>     # of unexpected failures    58
>>>     # of expected failures        6
>>>   * With ARM debug support
>>>     ===  Summary ===
>>>     # of expected passes        2727
>>>     # of unexpected failures    57
>>>     # of expected failures        6
>>>
>>> The extra success test is funccall.ll from test/DebugInfo. In order
>>> to build
>>> successfully LLVM on ARM Linux EABI platform, I put in comment the
>>> usage of
>>> __register_frame into JIT.cpp because it seems that __register_frame
>>> function is not into my libgcc. Could you mention which tools and
>>> versions
>>> that must to be used in order to build LLVM on ARM Linux EABI
>>> platform.
>>>
>>> Thanks,
>>>
>>> Mikaël.
>>>
>>> http://www.nabble.com/file/p20938563/arm-debug-from-llvm2-4.patch
>>> arm-debug-from-llvm2-4.patch
>>> -- 
>>> View this message in context:
>>> http://www.nabble.com/ARM-Debug-support-patch-tp20938563p20938563.html
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>>>
>>>
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>>
>>
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>
> -- 
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>
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