Re: Dwarf line output from readelf -wl

[Nick Clifton <nickc at redhat dot com>]

Hi Torleif,

> I have used readelf quite a bit, and on several occasions found that I 
> would like an output of the mapping between addresses and source locations
> from .debug_line in an objectfile..

Are you aware of the addr2line tool ?  (Also part of the binutils 
package).  It takes addresses and displays their corresponding file name 
and source line number.

> Invoking readelf with the -wl option, I am only able to see the
> opcodes passed to the DWARF state machine and not the address<->
> source location mapping.
>
> Is this intentional?

Yes...

> Would it be better to replace the current output from -wl with the
> address<->source mapping?

No.  One of the purposes of the readelf tool is to be able to display 
the ELF or DWARF information in a low level format so that it can be 
debugged.  ie the tool is intended to help tracing bugs in the 
generation of the ELF and DWARF information.  If the tool did not 
display the DWARF opcodes it would be much harder to diagnose a problem 
in their generation.

> Could a new option be added to serve this purpose?

Now this is certainly a possibility.  Would you like to volunteer to add 
it ? :-)

Cheers
  Nick