Re: Wrong address for static function in linux module

[Daniel Jacobowitz <drow@false.org>]

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