Fwd: KGDBOC testing on linux-2.6.30-rc4

[srikanth krishnakar]

Hi all,

I need help in kgdboc  testing on PowerPC target.

Linux Kernel: 2.6.30-rc4
KGDB method :* KGDBOC*
Arch: PowerPC

Note: Attached is the kernel config  used.

Has anyone tested KGDBOC for Serial 8250, and the serial port has dependency
on OF_PLATFORM driver ?

Here are the kernel config options:

Device Drivers  --->
           Character devices  --->
                          Serial drivers  --->
                                                     *<*> 8250/16550 and
compatible serial support *
*                                                     [*]   Console on
8250/16550 and compatible serial port*
                                                     (4) Number of
8250/16550 serial ports to register at runtime
                                                     [ ] Extended 8250/16550
serial driver options
                                                     *** Non-8250 serial
port support ***
                                                     <*> Xilinx uartlite
serial port support
                                                     [*]   Support for
console on Xilinx uartlite serial port

                                                     < > Digi International
NEO PCI Support
*                                                     <*> Serial port on
Open Firmware platform bus
*
                                                     < > NWP serial port
driver

Kernel hacking  --->
           -*- Magic SysRq key
                            *[*] Kernel debugging      *
                          *  [*] KGDB: kernel debugging with remote gdb
---> *
                            --- KGDB: kernel debugging with remote
gdb
                           *<*> KGDB: use kgdb over the serial console   *


----------------------------------------------
In the process :

    On the target side :

                             ...............
                             Serial: 8250/16550 driver, 4 ports, IRQ sharing
disabled

                             83e00000.serial: ttyS0 at MMIO 0x83e01003 (irq
= 16) is a
16550A
                             console [ttyS0]
enabled

                             kgdb: Registered I/O driver kgdboc.
                             .................

                            root at 10.161.2.35:~# *echo g >
/proc/sysrq-trigger*
                           * SysRq : GDB*
                            *Entering KGDB*


  On host side :

                           [root at srikant linux-2.6]# powerpc-linux-gnu-gdb
vmlinux-puru
                           GNU gdb G++ 4.3-150) 6.8.50.20081022-cvs
                           Copyright (C) 2008 Free Software Foundation, Inc.
                           License GPLv3+: GNU GPL version 3 or later <
http://gnu.org/licenses/gpl.html>
                           This is free software: you are free to change and
redistribute it.
                           There is NO WARRANTY, to the extent permitted by
law.  Type "show copying"
                           and "show warranty" for details.
                           This GDB was configured as
"--host=i686-pc-linux-gnu --target=powerpc-linux-gnu".
                           For bug reporting instructions, please see:
                          *(gdb) set remotebaud 9600*
                          *(gdb) target remote /dev/ttyS0*
                           Remote debugging using /dev/ttyS0
                          Ignoring packet error, continuing...
                          warning: unrecognized item "timeout" in
"qSupported" response
                          Ignoring packet error, continuing...
                          Ignoring packet error, continuing...
                          Ignoring packet error, continuing...
                          Ignoring packet error, continuing...
                          Ignoring packet error, continuing...
                          Malformed response to offset query, timeout

Can anybody comment on the steps followed in the process of testing or
something is missing with respect to of_serial.c for powerpc architecture.
Seems the target has never responded for gdb requests !!!


Regards
Srikanth
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