Re: Firewire blues

From: Stephan Uphoff (ups_at_tree.com)
Date: 02/14/05

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    To: Gerald Heinig <gheinig@syskonnect.de>
Date: Sun, 13 Feb 2005 22:46:29 -0500

    On Thu, 2005-02-10 at 12:02, Gerald Heinig wrote:
    > Stephan Uphoff wrote:
    > > Once I linked in dcons, dcons_crom and firewire into the kernel
    > > everything worked. (I think only dcons is really needed - maybe a link
    > > set issue?)
    > > I only used the gdb stub method.
    > >
    > > Can you send me your dmesg? (After you linked the dcons stuff into the
    > > kernel)
    >
    > Another thing: what system are you on? -current?
    > I'm using 5.3-RELEASE and I've noticed that a lot of the commands and
    > responses in the HowTo are different to my system.
    > Could that be the problem?
    >
    > Cheers,
    > Gerald

    OK - I finally managed to try this on a newly installed 5.3-RELEASE.

    I copied the GENERIC config file (to GENERIC.debug) and added a few
    lines

     diff -u GENERIC GENERIC.debug
    --- GENERIC Sun Oct 24 14:02:52 2004
    +++ GENERIC.debug Mon Feb 14 03:15:21 2005
    @@ -24,6 +24,14 @@
     cpu I686_CPU
     ident GENERIC
     
    +makeoptions DEBUG=-g # Build kernel with gdb(1)
    debug symbols
    +options KDB # Enable kernel debugger
    support.
    +options DDB # Support DDB.
    +options GDB # Support remote GDB.
    +options ALT_BREAK_TO_DEBUGGER
    +device dcons
    +device dcons_crom
    +
     # To statically compile in device wiring instead of /boot/device.hints
     #hints "GENERIC.hints" # Default places to look for
    devices.
     

    Then configured/compiled/installed the GENERIC.debug kernel.
    Copied the kernel.debug file in the GENERIC.debug compile directory to
    the debug station and rebooted the target machine.

    After reboot I set the default debugger to gdb

            target# sysctl -w debug.kdb.current=gdb
    and entered the debugger
            target# sysctl -w debug.kdb.enter=1

            
    On the debugging station I entered
            debug 1# dconschat -br -G 5555 -t <firewire address of target>

    and then in another window
            debug 2# kgdb -r :5555 kernel.debug

    And it just worked for me.
    I have to admit that my debugging machine is not 5.3 .. but I believe I
    used the same setup with pre 5.3 userland before.

    Let me know if you can repeat my steps.
    If not then I can set up a 5.3 debugging station in the next days.

    Stephan

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