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Subject: Re: rela sections in vmlinux
References: <56DC9B44.6020104@gmail.com>
From: Ruslan Kuprieiev <kupruser@gmail.com>
Message-ID: <56E752FB.6000300@gmail.com>
Date: Tue, 15 Mar 2016 02:10:35 +0200
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To: linux-kbuild@vger.kernel.org

Hi All,

Just wanted to answer my own question.

The problem was that I forgot to add --emit-relocs to my own script and
that's why I didn't find any rela sections in vmlinux. After adding proper
ld options everything started to make sense =).

Thanks,
Ruslan

On 03/06/2016 11:04 PM, Ruslan Kuprieiev wrote:
> Hi!
>
> I'm trying to figure out how CONFIG_RELOCATABLE works and one of the 
> things
> that I've noticed is that vmlinux itself doesn't have any rela 
> sections, which is
> confusing for me considering the name of the option. I did read the 
> patches that
> introduced this option but it is still not clear to me how exactly it 
> works and why
> there are no relocations left in the vmlinux. Could you please give me 
> a hint on
> why it happens and point me where to read more?
>
> I also see that vmlinux.o has all the rela sections I'm looking for(as 
> an object file
> should =)), so it raises another question: Is it possible to make 
> vmlinux keep that
> rela sections? I also went through makefiles but couldn't figure out 
> where to
> make a proper change to achieve that.
>
> I'm using default 3.10.0-229.20.1.el7.x86_64 centos7 kernel with 
> CONFIG_RELOCATABLE
> enabled.
>
> Thanks,
> Ruslan