dwfl_module_addrinfo and @plt entries

Mark Wielaard mark@klomp.org
Fri Jan 6 19:17:00 GMT 2017

On Fri, Jan 06, 2017 at 11:28:25AM +0100, Milian Wolff wrote:
> On Wednesday, January 4, 2017 2:42:23 PM CET Mark Wielaard wrote:
> > Longer answer. An address pointing into the PLT does
> > really point to an ELF symbol.
> You mean: does _not_
> Right?

Yes, I meant "does not point".

> > If we have such a backend function then we could even
> > do what BFD apparently does. Which is to then create a
> > "fake" symbol with as name real_function@plt. But I am
> > not sure such fake symbols are very useful (and will
> > quickly become confusing since they aren't real ELF
> > symbols).
> So the objdump command I used is leveraging BFD internally to give me the @plt 
> names? I noticed that I also see @plt in perf, which is also probably using 
> BFD internally. That at least clarifies why it works in some tools but not in 
> when using dwfl.

binutils objdump certainly does.

> > Hope that helps. And maybe inspires someone (you?) to
> > write up such a backend function and corresponding
> > dwfl frontend function.
> It does help, thanks. I'm interested in contributing such functionality, but, 
> sadly, I'm not sure when I'll get the time to actually do it.

Thanks, wish I had spare time myself :)



More information about the Elfutils-devel mailing list