Re: How to link a .o with all modules

[Kumar Gala]

On May 8, 2008, at 3:22 PM, Sam Ravnborg wrote:

> On Thu, May 08, 2008 at 09:16:10AM -0500, Kumar Gala wrote:
> > On May 5, 2008, at 3:44 PM, Sam Ravnborg wrote:
> >
> > > > > Let me know if this does address your question.
> > > >
> > > > The problem is MODPOST complains about undefined symbols:
> > > >
> > > > MODPOST 24 modules
> > > > ERROR: "_restgpr_20_x" [net/key/af_key.ko] undefined!
> > > > ERROR: "_restgpr_25_x" [net/key/af_key.ko] undefined!
> > > > ERROR: "_restgpr_30_x" [net/key/af_key.ko] undefined!
> > >
> > > I need a bit more context to try to analyse this.
> > > Where did you expect _restgpr_20_x to be defined.
> > > If in vmlinux then were they present in the
> > > Module.symvers file?
> >
> > No they aren't there since we I'm not EXPORT_SYMBOL() them.  Should I
> > also be doing EXPORT_SYMBOL?
>
> So modpost claim it cannot find the symbols.
>
> > > If in the linked in .o file - could you
> > > see the symbols using objdump.
> >
> > Yes.
> >
> > readelf -a:
> >
> > ...
> > Symbol table '.symtab' contains 113 entries:
> >   Num:    Value  Size Type    Bind   Vis      Ndx Name
> > ...
> >     5: 00000000     0 FUNC    GLOBAL DEFAULT    1 _savegpr_14
> >     6: 00000000     0 FUNC    GLOBAL DEFAULT    1 _save32gpr_14
> > ...
>
> Strange.
>
> I did not look closer.
> But it looks like the linker failed to resolve these symbols
> in the final link somehow - despite the symbols are present in
> the linked in .o file.
>
> Can you try to drop me the output of the relocation records for the
> finally linked .o file (the one with your .o file linked in).
>
> objdump -r IIRC


Sam,

Didn't see any feedback from the relocation records.

- k
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