kgdb on EM64T

From: Wilkerson, Bryan P (Bryan.P.Wilkerson_at_intel.com)
Date: 08/26/05

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    Date:	Fri, 26 Aug 2005 07:27:47 -0700
To: "George Anzinger" <george@mvista.com>, "Tom Rini" <trini@kernel.crashing.org>

    Thanks you Tom and George for the tips on using kgdb with
    2.6.13-rc4-mm1.

    I almost have it working but kgdb seems to have a few issues. I can get
    it running from the dev machine using the kgdb and console=kgdb boot
    options on the test kernel. The kernel waits as it should and when I
    attach with "target remote /dev/ttyS0" and I can continue the boot but
    eventually it gets to a point in the boot where it frees unused kernel
    memory successfully and then a warning, "unable to open an initial
    console", followed by, "Kernel panic - not syncing: Attempted to kill
    init!"

    Removing the console=kgdb boot option and the machine boots all the way
    to run level 5. I tried to break into kgdb at this point using the
            $echo -e "\003" > /dev/ttyS0
    from the dev machine but the test kernel panics at gdb_interrupt+75 when
    it receives anything on the serial port. Hmmm...

    I'm wondering if I'm maybe just the first to try this on EM64T (kernel
    builds in the arch/x86_64 tree).

    Any suggestions welcome.

    -bryan
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