From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>,
Yao Qi <yao@codesourcery.com>, Eric Miao <eric.y.miao@gmail.com>,
linux-arm-kernel@lists.infradead.org, gdb@sourceware.org
Subject: Re: Problem with GDB when debugging IRQ handlers
Date: Tue, 28 Jun 2011 14:38:00 -0000 [thread overview]
Message-ID: <20110628143758.GF21898@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <20110628143014.GD7255@1n450.cable.virginmedia.net>
On Tue, Jun 28, 2011 at 03:30:14PM +0100, Catalin Marinas wrote:
> Actually since the return address is in S_PC (which maybe gdb assumes it
> would be the saved LR), this is probably not be correct. After SVC
> entry, we have he following structure on the stack:
>
> ORIG_r0
> CPSR
> <--- assuming this is the Call Frame Address (SP+S_PC+4)
> PC <--- CFA - 4
> LR <--- don't care
> SP <--- CFA - 12
> ...
If I'm reading this correctly, it's not correct.
parent SP --> parent context stack
[possible empty word]
ORIG_r0
parent context CPSR
parent context PC
parent context LR
parent context SP
...
new SP --> R0
That empty word may or may not be present if the parent SP is aligned to
a 64-bit boundary.
next prev parent reply other threads:[~2011-06-28 14:38 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20110627125306.GA30646@doriath.ww600.siemens.net>
[not found] ` <20110627132735.GE16103@n2100.arm.linux.org.uk>
2011-06-27 14:04 ` Dmitry Eremin-Solenikov
2011-06-27 14:12 ` Hui Zhu
2011-06-27 14:59 ` Yao Qi
2011-06-28 10:40 ` Russell King - ARM Linux
2011-06-28 12:06 ` Dmitry Eremin-Solenikov
2011-06-28 12:14 ` Russell King - ARM Linux
2011-06-28 14:19 ` Catalin Marinas
2011-06-28 14:29 ` Catalin Marinas
2011-06-28 14:38 ` Russell King - ARM Linux [this message]
2011-06-28 14:42 ` Catalin Marinas
2011-06-28 14:44 ` Dmitry Eremin-Solenikov
2011-06-28 14:58 ` Dmitry Eremin-Solenikov
2011-06-28 15:06 ` Catalin Marinas
2011-06-28 15:46 ` Dmitry Eremin-Solenikov
2011-06-28 16:11 ` Catalin Marinas
2011-06-28 22:26 ` Dmitry Eremin-Solenikov
2011-06-29 9:10 ` Catalin Marinas
2011-06-29 11:21 ` Dmitry Eremin-Solenikov
2011-06-28 12:07 ` Hui Zhu
2011-06-28 12:09 ` Russell King - ARM Linux
2011-06-28 13:22 ` Catalin Marinas
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