linux-kernel - Re: [PATCH] perf annotate: Add config option for additional objdump arguments

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Message-ID: <20110416075415.GB19063@elte.hu>
Date:	Sat, 16 Apr 2011 09:54:15 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Anton Blanchard <anton@...ba.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf annotate: Add config option for additional objdump
 arguments


* Anton Blanchard <anton@...ba.org> wrote:

> 
> We sometimes need to pass arguments to objdump, for example to
> specify a particular machine type. In the case below I am profiling
> on POWER7 and perf annotate is unable to decode a POWER7 specific
> instruction:
> 
> c000000000008ff0:       7f 45 26 98     .long 0x7f452698
> 
> With the patch below and the following in ~/.perfconfig:
> 
> [objdump]
> 	options = -Mpower7

Hm, could we please detect the required flags automatically and pass them along 
without forcing people into twiddling their ~/.perfconfig?

I don't mind the options patch either - but please first automate it, *then* 
add this as a quick fix for similar future problems.

Thanks,

	Ingo
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