Subject: Re: [PATCH] x86: clean up vdso-layout.lds.S
From: Petr Tesarik <ptesarik@suse.cz>
To: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>, LKML <linux-kernel@vger.kernel.org>,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
       "H. Peter Anvin" <hpa@zytor.com>, Andi Kleen <andi@firstfloor.org>
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Date: Tue, 09 Jun 2009 10:29:10 +0200
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Roland McGrath píše v Út 09. 06. 2009 v 01:09 -0700:
> > Which version of binutils are you using? I'm using binutils-2.19, and
> > all empty sections get completely discarded, i.e. they do not affect the
> > size of the output in any way.
> 
> Oh, empty, sure.  So then what is ".broken" for at all?
> I thought this was for the nonempty-but-useless ones like .got et al
> that the linker will insist on creating but we don't really need in the vDSO.

No, that's for collecting sections which should never ever appear in a
vDSO. Or rather, when these sections do appear in a vDSO, I know for
sure that the resulting vDSO will not work properly.

Petr Tesarik


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