linux-kernel - Re: "." in vmlinux.lds.S

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Date:	Fri, 06 Jun 2014 11:40:05 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	"Hán Shěn (沈涵)" <shenhan@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: "." in vmlinux.lds.S

On 06/06/2014 10:08 AM, Hán Shěn (沈涵) wrote:
> A gentle ping?
> 
> On Tue, Jun 3, 2014 at 2:46 PM, Hán Shěn (沈涵) <shenhan@...gle.com> wrote:
>> Hi we are trying to boot up a x86_64 chrome book using binutils 2.24 and
>> kernel 3.8, but failed.
>>
>> After some triage work, we found that a 2-year-old binutil CL changed the
>> interpretation of "." in linker script （short story: absolute -> relative,
>> long story: https://sourceware.org/ml/binutils/2012-06/msg00155.html).
>>
>> After some further work, we are able to boot the kernel with a kernel patch
>> pasted at EOM. I am curious, why the upstream kernel is never hit by this
>> behavior? We enabled "CONFIG_DEBUG_RODATA", so we were hit, is this some
>> macro not usually turned on?

What does a section-relative symbol do?

--Andy
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