Sorry no idea. The configuration and options for kgdb are different in my architecture. In make menuconfig, under "Kernel Hacking', I enable kgdb and choose its serial port (ttyS0 or ttyS1). After this if I just pass a string with "kgdb" in it in the commandline, it halts early on. Looks like kgdb function is different in your architecture. You will have to read the code that implements your kgdb setup. Clearly it is not happy with the arguments you are passing it, as evident in the output. BTW I am using Linux kernel version 2.6.16 on a IBM405EP board. kgdb breakpoint is setup in setup_arch() in arch/ppc/kernel/setup.c. Note I also enabled CONFIG_WANT_EARLY_SERIAL in the processor configuration. Not sure if this is important. Vijay On 12/30/06, sudheer <urwithsudheer@xxxxxxxxx> wrote:
Vijay, Thanks for the reply. But before trying these options i want to clear one more issue. While booting the kgdb kernel the kernel claims "kgdb initialisation failure." I have observed it very lately. Memory CAM mapping: CAM0=256Mb, CAM1=0Mb, CAM2=0Mb residual: 0Mb Linux version 2.6.15.5 (root@Sudheer) (gcc version 3.4.4) #2 Fri Dec 29 17:58:40 IST 2006 KGDB cannot initialize I/O yet. Invalid syntax for option kgdb8250= Malformed early option 'kgdb8250' Built 1 zonelists Kernel command line: console=ttyS0,115200 root=/dev/ram rw kgdbwait kgdb8250=0,115200 OpenPIC Version 1.2 (1 CPUs and 60 IRQ sources) at fcfbb000 PID hash table entries: 2048 (order: 11, 32768 bytes) Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) I have changed the kgdb8250 arg to 1,0, but the result is same. And ...... I have checked the serial cable NULL Mode connecting x86 systems serially- with Cat and echo and this is fine. When i try with Unpatched kernel on target and host(x86) - cat < /dev/ttyS0 doesnt wait and returns to prompt. I tried with 2.6.13 and 2.6.15.5 with resepective kgdb patches, but the result is same (kgdb Initialization failure). I am not sure where am doing the mistake. Please guide me in right way and also please let me know if any more details are required. Happy New Year in Advance. Thanks Sudheer
-- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
