linux-kernel - Re: [tip:x86/build] x86, vdso: Error out if the vdso contains external references

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Message-ID: <4C1CE5CE.9090807@zytor.com>
Date:	Sat, 19 Jun 2010 08:44:14 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	mingo@...hat.com, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	hpa@...ux.intel.com, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/build] x86, vdso: Error out if the vdso contains external
 references

On 06/19/2010 12:27 AM, Andi Kleen wrote:
>> diff --git a/arch/x86/vdso/checkundef.sh b/arch/x86/vdso/checkundef.sh
>> new file mode 100755
>> index 0000000..490be1c
>> --- /dev/null
>> +++ b/arch/x86/vdso/checkundef.sh
>> @@ -0,0 +1,10 @@
>> +#!/bin/sh
>> +nm="$1"
>> +file="$2"
>> +"$nm" "$file" | grep '^ *U' > /dev/null 2>&1
> 
> Does that really handle the failed inline, static function case? 
> 
> In this case you get a function which is not 'U', but it's 
> just in the wrong section. I think that would need to be checked too.
> 

Makes sense.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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