linux-kernel - Re: linux-next: Tree for Dec 7 (kallsyms failure)

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Date:   Wed, 7 Dec 2016 18:30:57 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sachin Sant <sachinp@...ux.vnet.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: linux-next: Tree for Dec 7 (kallsyms failure)

On 12/07/16 15:56, Stephen Rothwell wrote:
> Hi Randy,
> 
> On Wed, 7 Dec 2016 15:42:32 -0800 Randy Dunlap <rdunlap@...radead.org> wrote:
>>
>> I started seeing this yesterday (2016-1206).
>> This is on x86_64.
>>
>> Anybody know about it?
>>
>> kallsyms failure: relative symbol value 0xffffffff81000000 out of range in relative mode
> 
> I got a similar failure starting a few days ago on my powerpc
> allyesconfig build.  I was assuming that it was PowerPC specific, but
> noone has found a cause yet.
> 

It may just be an invalid randconfig.  I modified scripts/kallsyms.c and
I see this message:
kallsyms failure: relative symbol value 0xffffffff81000000 [symbol: Tstartup_64] out of range in relative mode

and it makes sense that startup_64 would (or could) be at 0xffffffff81000000...
especially since CONFIG_PHYSICAL_START=0x1000000 and
(from Documentation/x86/x86_64/mm.txt)
ffffffff80000000 - ffffffff9fffffff (=512 MB)  kernel text mapping, from phys 0

Ard, what do you think about this?

thanks,
-- 
~Randy