From: behanw@converseincode.com (Behan Webster)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: LLVMLinux: Calculate pt_regs address from fp
Date: Fri, 06 Sep 2013 19:02:52 -0400 [thread overview]
Message-ID: <522A5F1C.400@converseincode.com> (raw)
In-Reply-To: <20130906221857.GQ6617@n2100.arm.linux.org.uk>
On 09/06/13 18:18, Russell King - ARM Linux wrote:
> On Fri, Sep 06, 2013 at 05:42:41PM -0400, behanw at converseincode.com wrote:
>> From: Behan Webster <behanw@converseincode.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?
Drat. Good point. Didn't think of that.
Could be rewritten to use current_stack_pointer (assuming the patch
series that implements that would be amenable).
Thanks,
Behan
--
Behan Webster
behanw at converseincode.com
prev parent reply other threads:[~2013-09-06 23:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 21:42 [PATCH] arm: LLVMLinux: Use __builtin_frame_address instead of named registers behanw at converseincode.com
2013-09-06 21:42 ` [PATCH] arm: LLVMLinux: Calculate pt_regs address from fp behanw at converseincode.com
2013-09-06 22:18 ` Russell King - ARM Linux
2013-09-06 23:02 ` Behan Webster [this message]
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