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From: Shivdas Gujare <shivdas.tech@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Subject: Understanding kernel Oops while using M-USB
Date: Thu, 14 May 2009 23:47:39 -0700	[thread overview]
Message-ID: <cf70f0210905142347y7738d194k5a616e7d9e4bf092@mail.gmail.com> (raw)

Following is a part of Oops on BeagleBoard, which I am trying to understand...
I have pasted complete Oops at http://pastie.org/478896

[<c0036d24>] (omap3_pm_idle+0x0/0x120) from [<c002c184>] (cpu_idle+0x40/0x60)
[<c002c144>] (cpu_idle+0x0/0x60) from [<c0299bfc>] (rest_init+0x58/0x6c)
 r5:c037ee8c r4:c0387d38
[<c0299ba4>] (rest_init+0x0/0x6c) from [<c0008a00>] (start_kernel+0x260/0x2b8)
[<c00087a0>] (start_kernel+0x0/0x2b8) from [<80008034>] (0x80008034)

--------------------end of oops------------------
c00087a0(virtual address of start_kernel) + 0x260(offset) = c0008a00
(value in square bracket above)
where c0008a00 is the address of next instruction after branch
instruction to c0299ba4(i.e rest_init)

But here, I didn't understood what is 0x2b8 from
(start_kernel+0x260/0x2b8). i.e. 0x260 is a offset from start_kernel
but what is 0x2b8?
Also what address 0x80008034 points to?

I tried to analyze this using "arm-none-linux-gnueabi-objdump -D vmlinux".

I what general scenarios "Unable to handle kernel paging request at
virtual address" this message gets printed?


Thanks for your help.

Thanks and Regards,
Shivdas Gujare

             reply	other threads:[~2009-05-15  6:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-15  6:47 Shivdas Gujare [this message]
2009-05-15 12:57 ` Viral Mehta

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