linux-kernel - Re: [RFC][PATCH 2/4 v4] ftrace/x86: Add save

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Message-ID: <1342747678.12353.84.camel@gandalf.stny.rr.com>
Date:	Thu, 19 Jul 2012 21:27:58 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [RFC][PATCH 2/4 v4] ftrace/x86: Add save_regs for i386 function
 calls

On Thu, 2012-07-19 at 16:07 -0700, H. Peter Anvin wrote:
> On 07/19/2012 04:04 PM, Steven Rostedt wrote:
>  
> > Basically, all we want to do is add 8 to the stack pointer. And this is
> > for the x86_32 version of whatever hardware is in use.
> > 
> 
> What I'm telling you is that it depends on the context.

It doesn't really matter anyway. My questions are more academic than
practical, as I'm just sticking with addl. Quibbling over addl or lea is
pointless, as addl at least shows us what we want to actually do: add 8
to the stack pointer.

-- Steve


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