linux-kernel - Re: How to link a .o with all modules

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Message-Id: <5DD68A6B-45FD-4163-BDF5-356C70A00676@kernel.crashing.org>
Date:	Thu, 8 May 2008 09:16:10 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	lkml List <linux-kernel@...r.kernel.org>,
	"linuxppc-dev@...abs.org list" <linuxppc-dev@...abs.org>
Subject: Re: How to link a .o with all modules


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?

> 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
...
>
>
> etc.
>
> Sorry - not much help right away.
>
> PS. Travelling - do not expect responses until the
> weekend.

np.
>
>
> 	Sam

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