Re: Wrong address for static function in linux module

[Jean-Rene Peulve <jr.peulve@wanadoo.fr>]

Hi Daniel,

I was using -g  from the standard uClinux tree to build the kernel.

I just tried -gdwarf-2 and it seems to work.

I got it right with -ggdb as well.

Many thanks.

By the way I had to fixe
Jean-René
At 16:40 11/04/06, Daniel Jacobowitz wrote:
>On Tue, Apr 11, 2006 at 04:31:32PM +0200, Jean-Rene Peulve wrote:
> > Hi Daniel,
> >
> > At 15:38 11/04/06, Daniel Jacobowitz wrote:
> > >On Tue, Apr 11, 2006 at 03:33:32PM +0200, Jean-Rene Peulve wrote:
> > >> Relocation section '.rela.stab' at offset 0x2039c contains 41 entries:
> > >>  Offset     Info    Type            Sym.Value  Sym. Name + Addend
> > >
> > >...
> > >
> > >> 000032e4  00000201 R_68K_32          00000000   .text + 136
> > >
> > >> Output of m68k-elf-readelf -s horloge.o:
> > >> Symbol table '.symtab' contains 47 entries:
> > >> ..
> > >>  12: 00000136    62 FUNC    LOCAL  DEFAULT    1 horloge_read
> > >
> > >There's your relocation of debug info.
> > >
> > >It is entirely likely that the problem only happens because you're
> > >using stabs.  It's supposed to work, but I've never tried it.  Try
> > >taking a look at the contents of the .stab section at that offset
> > >(0x32e4) in the file.  Then breakpoint after the call to
> > >symfile_relocate_debug_section in elfstab_build_psymtabs, and see
> > >what's at offset 0x32e4 now.  It should be a bit relocated.
> >
> > In bfd_perform_relocation for the .stab section I see that at line 633
> > relocation is 0 for the static function horloge_read when it is 0x37a for
> > the non static function HorlogeCheck.
>
>That is not a problem.  That's just the symbol value, relative to the
>start of .text.  Look down at line 645, and you'll see the addend
>applied.
>
> > What do you recommend to use rather than stabs ?
>
>DWARF-2.
>
>--
>Daniel Jacobowitz
>CodeSourcery