[Question] stripped lib and it's line numbers

[Taeung Song]

Hi Jiong Wang

On 03/03/2017 01:34 AM, Jiong Wang wrote:
> On 02/03/17 15:27, Taeung Song wrote:
>> Hi,
>>
>> I have a question.
>> I believe objdump can't show line numbers for a stripped program.
>> But 'objdump -l' can do that in some cases ?
>>
>
> Hi Taeung,
>
>   I think it's because objdump knows debug version library from
> .note.gnu.build-id or gnu_debuglink section (for example under
> /usr/lib/debug/lib/x86_64-linux-gnu/)
>
>   see the following code in bfd/dwarf2.c
>
>       debug_filename = bfd_follow_build_id_debuglink (abfd, DEBUGDIR);
>       if (debug_filename == NULL)
>         debug_filename = bfd_follow_gnu_debuglink (abfd, DEBUGDIR);
>
>

Thank you! I understood the reason.

Thanks,
Taeung