From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: show_regs dump stack when ARM_UNWIND enable
Date: Tue, 10 Aug 2010 23:59:19 +0100 [thread overview]
Message-ID: <20100810225919.GG7702@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <AANLkTimjAp8-WQ2D_-gJkh_wBW0yuDfGs6DaMgwk59e=@mail.gmail.com>
On Tue, Aug 10, 2010 at 11:27:54AM +0800, ye janboe wrote:
> hi, Russell
>
> I agree with this.
>
> But I am confused with c_bactrace in arm_syscall. This function is
> used to dump stack when arm syscall failed.
> regs->ARM_fp should be an userspace address and c_backtrace should
> fail to dump the backtrace.
>
> Do you know what the purpose c_backtrace here?
Debugging kernel failures in earlier kernels when there wasn't such
stuff as EABI to worry about - from times when programs were built
with frame pointers.
That call should probably be removed now.
prev parent reply other threads:[~2010-08-10 22:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 15:24 [PATCH] arm: show_regs dump stack when ARM_UNWIND enable janboe
2010-07-20 15:37 ` Catalin Marinas
2010-07-20 15:54 ` ye janboe
2010-07-21 9:21 ` Catalin Marinas
2010-07-21 17:24 ` Janboe Ye
2010-07-22 8:00 ` Russell King - ARM Linux
2010-08-10 3:27 ` ye janboe
2010-08-10 22:59 ` Russell King - ARM Linux [this message]
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