On 12/14/06, Reeve Yang <yang.reeve@gmail.com> wrote:
I set "debug serial 1" in gdb, now I'm seeing message like this

(gdb) target remote /dev/ttyS0
Remote debugging using /dev/ttyS0
[
r <Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>]Ignoring packet error, continuing...
[<Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>]Ignoring packet error, continuing...
[<Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>][<Timeout: 2 seconds>][<Timeout: 2
seconds>][<Timeout: 2 seconds>]Ignoring packet error, continuing...
Malformed response to offset query, timeout

Does it tell any information?

Yes. Apparently your kernel command line is wrong.

Vitaly