linux-kernel - Re: [PATCH 2/2] perf top: Properly notify the user that vmlinux is missing

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Message-Id: <20100315.122605.124976085.davem@davemloft.net>
Date:	Mon, 15 Mar 2010 12:26:05 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	acme@...radead.org
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, fweisbec@...il.com,
	efault@....de, a.p.zijlstra@...llo.nl, paulus@...ba.org
Subject: Re: [PATCH 2/2] perf top: Properly notify the user that vmlinux is
 missing

From: Arnaldo Carvalho de Melo <acme@...radead.org>
Date: Mon, 15 Mar 2010 16:21:26 -0300

> Em Mon, Mar 15, 2010 at 11:55:26AM -0700, David Miller escreveu:
>> Arnaldo, if perf top can use the kallsyms to do it's normal task, why
>> can't it use that for symbol annotations too?  Isn't there enough
>> information available?
> 
> Annotation is done by objdump -dS, that requires an executable file to
> do ASM annotation, and one with DWARF info for source code annotation.
> What we have with /proc/kallsyms is just the symtab.

Ok, I really think we should link with libopcodes or similar so we can
handle the simple assembler annotation case without requiring the
kernel image being available.

That's what I was trying to achieve when I sent you the report
:-)
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