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    SubjectRe: Kernel Debugging Hardware
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    Shay Rojansky <roji@cs.huji.ac.il> wrote:
    > Another nifty kernel debugging tool; if you don't have another machine
    > to spare and want to debug your OWN running kernel try kdebug:
    > ftp://hyper.stanford.edu/pub/pcmcia/extras/kdebug-1.6.tar.gz
    > issues some commands to gdb for limited debugging (no single-stepping
    > or breakpoints, or course, but viewing AND modification of kernel structures
    > is available indeed!).

    At one point in the past (linux-1.3.30) I had modifications to David
    Hinds' kdebug to support single-stepping and breakpointing.
    Details are at <http://www.isi.edu/~johnh/SOFTWARE/xkdebug.html>.

    If you don't have two machines, someone might want to try bringing
    this forward to a modern kernel.

    -John Heidemann

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