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Re: [PATCH v7 04/17] tracing: add static function tracer support for MIP

To: "Maciej W. Rozycki" <macro@linux-mips.org>
Subject: Re: [PATCH v7 04/17] tracing: add static function tracer support for MIPS
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 12 Nov 2009 22:16:37 +0100
Cc: Wu Zhangjin <wuzhangjin@gmail.com>, David Daney <ddaney@caviumnetworks.com>, linux-mips@linux-mips.org, linux-kernel@vger.kernel.org, zhangfx@lemote.com, zhouqg@gmail.com, rostedt@goodmis.org, Frederic Weisbecker <fweisbec@gmail.com>, Ingo Molnar <mingo@elte.hu>, Nicholas Mc Guire <der.herr@hofr.at>, Richard Sandiford <rdsandiford@googlemail.com>, Patrik Kluba <kpajko79@gmail.com>, Thomas Gleixner <tglx@linutronix.de>, Michal Simek <monstr@monstr.eu>
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On Wed, Nov 11, 2009 at 01:30:40PM +0000, Maciej W. Rozycki wrote:

> 
> On Wed, 11 Nov 2009, Ralf Baechle wrote:
> 
> > 64-bit with -mlong-call:
> > 
> >     lui     $25, %highest(foo)
> >     lui     $2, %hi(foo)
> >     daddiu  $25, %higher(foo)
> >     daddiu  $2, %lo(foo)
> >     dsll    $25, 32
> >     daddu   $25, $2
> >     jalr    $25
> 
>  Don't we use -msym32 these days for this very reason?

We do - where we can.  Not all systems can use -msym32.

  Ralf

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