linux-kernel - Re: [PATCH 1/3] x86: record relocation offset

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Message-ID: <4B3C81F7.6050800@cn.fujitsu.com>
Date:	Thu, 31 Dec 2009 18:50:31 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	James Bottomley <James.Bottomley@...e.de>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] x86: record relocation offset



Arnaldo Carvalho de Melo wrote:

> 
> Well, then its just a matter of exposing _text as
> /sys/kernel/sections/.text, as we already have for modules:
> 
> [acme@ana linux-2.6-tip]$ cat /sys/module/ipv6/sections/.text 
> 0xfa0c2000
> 
> Which matches
> 
> nf_conntrack_ipv6 17548 2 - Live 0xfa147000
> ipv6 239420 32 ip6t_REJECT,nf_conntrack_ipv6, Live 0xfa0c2000
> [acme@ana linux-2.6-tip]$
> 
> But even as a quick transational assist, we can look at kallsyms at
> 'perf record' time.
> 

Ah, i see, it's really a nice way.

>>> I'll do that tomorrow, if Xiao doesn't beats me to it :-)
> 
>> Of course, please do if you have a better way :-)
> 
> I meant, if you didn't write the patch first, while I was sleeping :-)
> 
> I'll work on it today after some coffee and errands.
> 

Please do :-)

Xiao
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