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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