linux-kernel - Re: [PATCHv9 2.6.35-rc4-tip 0/13] Uprobes Patches:

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Message-ID: <1279727429.4818.72.camel@gandalf.stny.rr.com>
Date:	Wed, 21 Jul 2010 11:50:29 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Naren A Devaiah <naren.devaiah@...ibm.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCHv9 2.6.35-rc4-tip 0/13]  Uprobes Patches:

On Wed, 2010-07-21 at 11:22 -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jul 21, 2010 at 08:12:00AM +0530, Srikar Dronamraju escreveu:

> I guess this is what he means:
> 
> [acme@...pio linux-2.6-tip]$ grep ' [TtWw] .\+\.' /proc/kallsyms | head -5
> ffffffff81000646 t trace_kmalloc.clone.0
> ffffffff810006ac t create_dev.clone.0
> ffffffff81006ae4 t test_ti_thread_flag.clone.0
> ffffffff8100a388 t trace_power_start.clone.0
> ffffffff8100ad8d t user_regset_copyin.clone.0
> [acme@...pio linux-2.6-tip]$ readelf -s ../build/v2.6.35-rc5-tip+/vmlinux | grep ' FUNC .\+\.' | head -5
>    165: ffffffff81000646   101 FUNC    LOCAL  DEFAULT    1 trace_kmalloc.clone.0
>    180: ffffffff810006ac    44 FUNC    LOCAL  DEFAULT    1 create_dev.clone.0
>    438: ffffffff81006ae4    22 FUNC    LOCAL  DEFAULT    1 test_ti_thread_flag.clone
>    510: ffffffff81ae5c40   136 FUNC    LOCAL  DEFAULT   22 e820_end_pfn.clone.0
>    750: ffffffff8100a388    65 FUNC    LOCAL  DEFAULT    1 trace_power_start.clone.0
> [acme@...pio linux-2.6-tip]$
> 
> Or at least those are the ones with dots here.

Note, in PPC64 the function names all start with dots. That is, a
function name is just a symbol look up to the actual function which is
referenced by a '.'.


 sys_read: points to .sys_read

 .sys_read: actual address of start of function.

-- Steve


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