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Re: Libdw sample for reading function names and addresses


Mark Wielaard <mjw@redhat.com> writes:

> On Sat, 2014-11-08 at 22:00 -0500, buddhika chamith wrote:
>> I have a requirement to read off function names and addresses from an
>> ELF binary debug symbols. Is there any such piece of code that's
>> already there that you have written? I had a look at some elfutils
>> codes (e.g: nm.c) in the hope of adapting them to my requirement. But
>> the libdw API is seems bit intimidating to me given that I have
>> little knowledge on Dwarf format.
>
> There is no such thing as "debug symbols". There are various DIEs (Debug
> Information Entries) that can be associated with particular address
> ranges though. You might want to read a bit about DWARF at
> http://dwarfstd.org/

There's also .symtab, if that's enough.  dwfl_module_getsymtab and
dwfl_module_getsym should be able to retrieve it even from a separate
debug-info file, in case it was stripped, otherwise gelf_getsym would be
enough (and easier to set up than Dwfl).

Petr.

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