Date: Fri, 11 Feb 2011 09:38:53 +0000
From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Dave Martin <dave.martin@linaro.org>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>,
        Sachin Verma <imschnvrm@gmail.com>, Rabin Vincent <rabin@rab.in>,
        Alexander Holler <holler@ahsoftware.de>,
        lkml <linux-kernel@vger.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        catalin.marinas@arm.com
Subject: Re: ARM: relocation out of range (when loading a module)
Message-ID: <20110211093853.GA23404@n2100.arm.linux.org.uk>
References: <4D2D1942.4050905@ahsoftware.de> <AANLkTimAFp7ORrJLw2d8-i5pK0MZGTyAN5kmRR37ky1v@mail.gmail.com> <alpine.LFD.2.00.1101121314470.25498@xanadu.home> <20110112184258.GH11039@n2100.arm.linux.org.uk> <alpine.LFD.2.00.1101121350350.25498@xanadu.home> <AANLkTikLwTdV2B5Dyp_adCxgWcE-+Wb6uiN5MBfnA1_K@mail.gmail.com> <alpine.LFD.2.00.1101270030220.8580@xanadu.home> <20110210154322.GE1742@n2100.arm.linux.org.uk> <alpine.LFD.2.00.1102101405010.14920@xanadu.home> <AANLkTi=KtFf5BU-iH-sUUL=Q30S90bk608JR4zFz2CKf@mail.gmail.com>
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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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