linux-kernel - Re: [PATCH v4 2/3] csky: Add support for perf registers sampling

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Message-ID: <20190415090104.GA10228@guoren-Inspiron-7460>
Date:   Mon, 15 Apr 2019 17:01:04 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Mao Han <han_mao@...ky.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/3] csky: Add support for perf registers sampling

Hi Mao,

Sorry, currect:

On Thu, Apr 11, 2019 at 03:45:00PM +0800, Mao Han wrote:
> This patch implements the perf registers sampling and validation API
> for csky arch. The valid registers and their register ID are defined in
> perf_regs.h. Perf tool can backtrace in userspace with unwind library
> and the registers/user stack dump support.

> +	return ((long *)regs)[idx];
	return (u64)*((u32 *)regs + idx);

Best Regards
 Guo Ren