Dear Dongdong_Deng,
Yes, I've tried but still couldn't connect to agent-proxy.
BTW, I met the kernel panic when I triggered "echo g > /proc/sysrq-trigger" as
attached.
Thanks,
Ban
-----Original Message-----
From: Dongdong Deng [mailto:[email protected]]
Sent: Friday, August 10, 2012 11:14 AM
To: Ban Feng(馮冠中)
Cc: [email protected]
Subject: Re: [Kgdb-bugreport] KGDB setup problem
On Thu, Aug 9, 2012 at 3:54 PM, <[email protected]> wrote:
> Dear Mr. & Miss,
>
> Attached the panic log
>
> Thanks,
> Ban
>
> From: Ban Feng(馮冠中)
> Sent: Wednesday, August 08, 2012 2:24 PM
> To: '[email protected]'
> Subject: KGDB setup problem
>
> Dear Mr. & Miss,
>
> Thanks in advance your kindly advice.
> Recently I try to setup KGDB on my device (Android ARM based), and study the
> following pdf:
> http://kernel.org/pub/linux/kernel/people/jwessel/dbg_webinar/State_Of
> _kernel_debugging_LinuxCon2010.pdf
>
> According to my device only has one serial port, I choose agent-proxy.
> The following instructions are what I’ve done:
>
> $ ./agent-proxy 5550^5551 0 /dev/ttyUSB0,115200 & [1] 17919 $ Agent
> Proxy 1.96 Started with: 5550^5551 0 /dev/ttyUSB0,115200 Agent Proxy
> running. pid: 17919 telnet localhost 5550 Trying 127.0.0.1...
> Connected to localhost.
> Escape character is '^]'.
>
> After that, I could see the kernel log appeared, then “echo ttyS0 >
> /sys/module/kgdboc/parameters/kgdboc”
> [ 877.139512] kgdb: Registered I/O driver kgdboc.
>
> Besides, I try to add my debug port like your pdf page 14 said, however, met
> some troubles:
> (gdb) tar rem localhost:5551
> Remote debugging using localhost:5551
> warning: unrecognized item "qSupported" in "qSupported" response
> Malformed response to offset query, qOffsets
>
> Meanwhile, I saw the weird messages from my console port when I typed “tar
> rem …”:
> +$Hg0#df+$?#3f+$Hc-1#09-+$qC#b4-+$qAttached#8f$qAttached#8f+$qOffsets#
> +4b++
>
>
> When I turn on “set debug remote 1”, and “echo g >
> /proc/sysrq-trigger”(panic happen),
>
> the error messages are as attached.
>
> I connect the device to my server via RS-232, and ttyUSB0 was established.
> I have no idea which part I need to amend? Please kindly give me some
> suggestions
>
> Thanks,
> Ban
>
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Hi Ban,
Could your try "# echo g > /proc/sysrq-trigger" on "telnet localhost 5550"
before attaching kgdb using " (gdb) tar rem localhost:5551".
Thanks,
Dongdong
------------------------------------------------------------------------------
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Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
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