linux-kernel - Re: [PATCH v7 04/17] tracing: add static function tracer support for MIPS

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Message-ID: <20091112211637.GA27465@linux-mips.org>
Date:	Thu, 12 Nov 2009 22:16:37 +0100
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:	Wu Zhangjin <wuzhangjin@...il.com>,
	David Daney <ddaney@...iumnetworks.com>,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	zhangfx@...ote.com, zhouqg@...il.com, rostedt@...dmis.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Nicholas Mc Guire <der.herr@...r.at>,
	Richard Sandiford <rdsandiford@...glemail.com>,
	Patrik Kluba <kpajko79@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH v7 04/17] tracing: add static function tracer support
	for MIPS

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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