From: behanw@converseincode•com (Behan Webster)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 1/5] arm: LLVMLinux: Add current_stack_pointer macro for ARM
Date: Fri, 06 Sep 2013 18:50:45 -0400 [thread overview]
Message-ID: <522A5C45.5030709@converseincode.com> (raw)
In-Reply-To: <yw1xmwnp1txm.fsf@unicorn.mansr.com>
On 09/06/13 18:12, M?ns Rullg?rd wrote:
> behanw at converseincode.com writes:
>
>> +#define current_stack_pointer ({ \
>> + unsigned long current_sp; \
>> + asm ("mov %0, r13" : "=r" (current_sp)); \
>> + current_sp; \
>> +})
> Why do you use 'r13' rather than the more common 'sp' alias?
Originally we were using LLVM's Integrated Assembler (IA), which didn't
allow for that alias if I remember correctly. However, now we're using
gas because IA only supports Unified Assembly Language grammar, and not
the extensions that are common in the kernel code.
I can resubmit using that alias (after the rest of the discussion).
Behan
--
Behan Webster
behanw at converseincode.com
next prev parent reply other threads:[~2013-09-06 22:50 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-06 21:28 [PATCH 0/5] arm: LLVMLinux: Add current_stack_pointer behanw at converseincode.com
2013-09-06 21:28 ` [PATCH 1/5] arm: LLVMLinux: Add current_stack_pointer macro for ARM behanw at converseincode.com
2013-09-06 22:12 ` Måns Rullgård
2013-09-06 22:50 ` Behan Webster [this message]
2013-09-06 22:20 ` Russell King - ARM Linux
2013-09-06 22:54 ` Behan Webster
2013-09-06 21:28 ` [PATCH 2/5] arm: LLVMLinux: use current_stack_pointer for percpu behanw at converseincode.com
2013-09-06 22:22 ` Russell King - ARM Linux
2013-09-06 22:56 ` Behan Webster
2013-09-06 22:31 ` Måns Rullgård
2013-09-06 22:59 ` Behan Webster
2013-09-07 5:12 ` Nicolas Pitre
2013-09-09 9:59 ` Will Deacon
2013-09-06 21:28 ` [PATCH 3/5] arm: LLVMLinux: Use current_stack_pointer for return_address behanw at converseincode.com
2013-09-06 21:28 ` [PATCH 4/5] arm: LLVMLinux: Use current_stack_pointer in save_stack_trace_tsk behanw at converseincode.com
2013-09-06 21:28 ` [PATCH 5/5] arm: LLVMLinux: Use current_stack_pointer in unwind_backtrace behanw at converseincode.com
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