Re: debugging LKMs with GDB

[aq <aquynh@xxxxxxxxx>]

On Mon, 8 Nov 2004 01:04:04 +0000, Jon Masters <jonmasters@xxxxxxxxx> wrote:
> On Sun, 7 Nov 2004 21:51:11 +0530, Shakthi Kannan <shakthimaan@xxxxxxxxx> wrote:
> 
> > On Sun, 7 Nov 2004 14:07:47 +0530, Himanshu Chauhan
> > <meethimanshuchauhan@xxxxxxxxx> wrote:
> > > As we can debug user space programs with GDB, how can we debug the
> > > loadable kernel modules
> > > with GDB.
> >
> > I believe it can be done. You can probably even use ddd (Data Display
> > Debugger). But, you may have to pass /proc/kcore to gdb.
> 
> You can, but not from the same box.
> 
> As was mentioned by Ajey Kulkarni in an earlier post, kgdb should help
> here - it's a patch to the kernel which allows remote debugging from a
> second host, whereas kdb (without the g) is a built-in debugger that
> won't give you quite the level of debug.
> 
> Note that Linus does not bless kernel debuggers, but he has come
> around to understanding a use for Dprobes. Perhaps it's worth using
> probes as an alternative to a full debugger.

You misspelled it. That should be "kprobes", not Dprobes

regards,
AQ

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