linux-kernel - Re: ARM: relocation out of range (when loading a module)

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Message-ID: <20110211093853.GA23404@n2100.arm.linux.org.uk>
Date:	Fri, 11 Feb 2011 09:38:53 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Dave Martin <dave.martin@...aro.org>
Cc:	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Sachin Verma <imschnvrm@...il.com>,
	Rabin Vincent <rabin@....in>,
	Alexander Holler <holler@...oftware.de>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	catalin.marinas@....com
Subject: Re: ARM: relocation out of range (when loading a module)

On Fri, Feb 11, 2011 at 09:31:04AM +0000, Dave Martin wrote:
> You could probably cook up a good upper bound based on the size of the
> kernel and the number of symbols in the module: i.e., assume that
> every undefined symbol in the module needs to be fixed up to point at
> the most distant symbol in the kernel.
> 
> For people with normal-sized kernels, this bound will probably work
> out as zero most of the time (i.e., the current situation).  For
> people with big kernels, or when many modules are already loaded, it
> may work out at 100% -- but that's the price to pay for guaranteed
> preallocation of the space required for the veneers.  And anyway, you
> may really need a substantial chunk of those veneers in such cases.

I think it's going to be easier just to re-order the kernel image link
order to solve that problem.  That just leaves uclinux...
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