linux-kernel - Re: [-mm PATCH] kallsyms should prefer non weak symbols

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Message-ID: <20071204223123.GA11100@Krystal>
Date:	Tue, 4 Dec 2007 17:31:23 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Paulo Marques <pmarques@...popie.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [-mm PATCH] kallsyms should prefer non weak symbols

* Arjan van de Ven (arjan@...radead.org) wrote:
> On Tue, 04 Dec 2007 20:35:32 +0000
> Paulo Marques <pmarques@...popie.com> wrote:
> 
> > 
> > When resolving symbol names from addresses with aliased symbol names, 
> > kallsyms_lookup always returns the first symbol, even if it is a weak 
> > symbol.
> > 
> > This patch changes this by sorting the symbols with the weak symbols 
> > last before feeding them to the kernel. This way the kernel runtime 
> > isn't changed at all, only the kallsyms build system is changed.
> > 
> 
> what user of this api is affected by this?
> 

grep -r kallsyms_lookup * does a pretty good job at it ;)

kernel/kprobes.c
arch/x86/kernel/traps_64.c
blackfin/kernel/traps.c
parisc/kernel/unwind.c
powerpc/xmon/xmon.c
sh64/kernel/unwind.c
kernel/kallsyms.c : sprint_symbol()

Then, sprint_symbol users :

kernel/lockdep_proc.c
kernel/softirq.c
mm/slub.c
fs/gfs2/glock.c
arch/x86/kernel/traps_32.c
arch/x86/kernel/traps_64.c
x86/kernel/syscall_64.c

Mathieu

> 
> -- 
> If you want to reach me at my work email, use arjan@...ux.intel.com
> For development, discussion and tips for power savings, 
> visit http://www.lesswatts.org
> 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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