Re: [KGDB PATCH][7/7] Move debugger_entry()

[George Anzinger]

Amit S. Kale wrote:
> On Wednesday 03 Mar 2004 6:38 am, George Anzinger wrote:
>
> > Amit S. Kale wrote:
> >
> > > OK to checkin.
> > >
> > > -Amit
> > >
> > > On Saturday 28 Feb 2004 3:24 am, Tom Rini wrote:
> > >
> > > > Hello.  When we use kgdboe, we can't use it until do_basic_setup() is
> > > > done. So we have two options, not allow kgdboe to use the initial
> > > > breakpoint or move debugger_entry() to be past the point where kgdboe
> > > > will be usable. I've opted for the latter, as if an earlier breakpoint
> > > > is needed you can still use serial and throw
> > > > kgdb_schedule_breakpoint/breakpoint where desired.
> > > >
> > > > --- linux-2.6.3-rc4/init/main.c	2004-02-17 09:51:19.000000000 -0700
> > > > +++ linux-2.6.3-rc4-kgdb/init/main.c	2004-02-17 11:33:51.854388988 -0700
> > > > @@ -581,6 +582,7 @@ static int init(void * unused)
> > > >
> > > > 	smp_init();
> > > > 	do_basic_setup();
> > > > +	debugger_entry();
> >
> > It would be nice to not need this.  Could it be a side effect of
> > configuring the interface or some such so we don't have to patch
> > init/main.c
>
>
> I attempted doing this when I was trying to code a netpoll independent 
> ethernet interface. I couldn't do without it. I needed one hook to kgdb in 
> init to mark completion of smp_init. If an interface was ready, that hook 
> called breakpoint. A similar hook was placed in interface initialization 
> code, it called breakpoint, if kgdb core was ready on account of smp_init 
> completion.
I guess the real question is why do you need to wait so long?  What is it that 
needs to be done prior to this call?

On the other hand, I have a late call (I use module init) to set up the 
interrupt handler for the UART, which needs to happen after malloc is working. 
This, however, does not cause, of it self, a break.

> -Amit
>
>
>
>
> > -g
> >
> >
> > > > 	prepare_namespace();
> > >
> > > -
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>
>
> -
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--
George Anzinger   george@xxxxxxxxxx
High-res-timers:  http://sourceforge.net/projects/high-res-timers/
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