Re: ELF expert's help/advice/opinion wanted for two bugs

[GOTO Masanori <gotom@debian.or.jp>]

At Tue, 29 Jun 2004 16:56:14 -0400,
Daniel Jacobowitz wrote:
> On Tue, Jun 29, 2004 at 10:42:10PM +0200, Jeroen van Wolffelaar wrote:
> > http://bugs.debian.org/249435 : lintian
> > 
> >   objdump -T gives "Invalid operation" on some ELF files in
> >   /usr/lib/debug. Is this objdump at fault? On files without a dynamic
> >   section, usually objdump simply doesn't display the dynamic symbols,
> >   so why does it error out here?
> > 
> >   Example:
> > 
> >   $ file /usr/lib/debug/usr/lib/gconv/ISO8859-1.so
> >   ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), not
> >   stripped
> >   $ objdump -T /usr/lib/debug/usr/lib/gconv/ISO8859-1.so
> >   (...)
> >   objdump: ISO8859-1.so: Invalid operation
> >   $
> 
> Because that fail has a dynamic section - but it's empty.  This
> confuses objdump terribly.
> 
> I don't know if it's an objdump bug or not but my inclination is not.
> Files in /usr/lib/debug/ are normal libraries, but files in
> subdirectories of /usr/lib/debug generally won't be now that
> objcopy --only-keep-debug has been implemented.

objdump -T is similar to nm -D:

gotom@moog:~> nm -D /usr/lib/debug/usr/lib/gconv/ISO8859-1.so
nm: /usr/lib/debug/usr/lib/gconv/ISO8859-1.so: No symbols

It's better than objdump + bfd error bfd_error_invalid_operation, but
it's trivial.

Regards,
-- gotom