linux-kernel - Re: [PATCH] arm: LLVMLinux: Calculate pt

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Date:	Fri, 6 Sep 2013 23:18:57 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	behanw@...verseincode.com
Cc:	Mark Charlebois <charlebm@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Dave Jones <davej@...hat.com>,
	"moderated list:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm: LLVMLinux: Calculate pt_regs address from fp

On Fri, Sep 06, 2013 at 05:42:41PM -0400, behanw@...verseincode.com wrote:
> From: Behan Webster <behanw@...verseincode.com>
> 
> Use the frame pointer to calculate the end of the stack for current_pt_regs()
> The existing code uses the stack pointer to do this calculation.
> Using the frame pointer yeilds the same value in a more portable way.
> This change supports being able to compile the kernel with gcc and clang.

What happens when frame pointers are disabled on gcc?
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