how to start debug

From: John Black (black_at_eed.com)
Date: 10/30/04 

Date: Fri, 29 Oct 2004 16:41:45 -0600

Hi,
    I have a PowerPC405 board and I know the on-board device are good as
they all pass my initial test. Now I have a MontaVista Linux build and
through JTAG I download the build to the board, but there is nothing
coming out to my host HyperTerminal.

    I stop the linux running and see PC is a value which there is no
memory there, but maybe it is a virtual memory address. Now I am stuck,
how to proceed.

    I do not debug Linux before, but I'd like to learn. My question is
what is the 1st step to debug Linux?

    My host PC has PowerPC ported GDB supporting JTAG, but the build I
have is optimized, I wonder how to add the debug info into build.

Thanks.