Sequoia build with KDBG
olof at lixom.net
Sun Mar 2 02:57:54 EST 2008
On Sat, Mar 01, 2008 at 07:13:15AM -0600, Josh Boyer wrote:
> On Fri, 29 Feb 2008 23:02:50 -0600
> Olof Johansson <olof at lixom.net> wrote:
> > On Fri, Feb 29, 2008 at 08:30:15PM -0600, Josh Boyer wrote:
> > > > poor man's debugging works fine if a serial port is available, but my
> > > > Sequoia platform doesn't get that far! I use u-boot to download and
> > > > boot my image, and I don't get any serial output after the boot completes:
> > >
> > > By "poking characters out the serial port" I meant I literally coded up
> > > assembly functions to setup MMU translations and poke hex values at hard
> > > coded addresses. That's why it's "poor man's". If you had a working
> > > serial port out of the box, that would be a luxury ;).
> > Does 4xx have support for udbg and xmon? That would be a good first step
> > in getting an in-kernel debugger facility going.
> Yes. Or at least it did as of a few kernel releases ago when I last
> tested it. It's helpful for a number of thing, but debugging extremely
> early stuff isn't possible with it.
Right, most in-kernel debuggers will be useless for that, so I doubt kgdb will
help in those cases either.
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