Hiro Sugawara wrote:
>
> Ah, that's a very good point, Matt!
>
> I've so far been working only with a live kernel and I've never
> applied the lkcd kernel patch so that I did not create Kerntypes.
> No wonder I could not find Kerntypes! I instead rebuilt my kernel
> with -g. Yeah, the file size became over 4MB which is no good for
> an embedded system, but I am still in the development stage.
>
> What about my original question about the necessity of System.map?
> I found the kernel Makefile actually uses nm to create it. So, as
> long as the kernel image is available, it doesn't seem necessary.
Sure, you can use that mechanism if you want -- I prefer to reference
the created version rather than use 'nm', but the beauty of open
source is you can do it however you want. :) :)
As long as the kernel_magic and _end symbols match up, you're okay.
That's the biggest concern.
> In an embedded application like ours, it costs money to keel extra
> files like System.map. So, I plan to modify lcrash so that it accepts
> a vmlinux file or even a zImage file as the first argument, and a
> compressed Kerntypes file as the third argument. It shouldn't be too
> difficult to make lcrash automatically distinguish the file types
> given to the command line.
I'm in the process of building gzip / gunzip as a dump compression
type. Let me think about the compressed Kerntypes file issue. I
mean, you could stream uncompress it into 'lcrash', but I don't know
if that's what you want to do.
--Matt
> hiro
>
> > -----Original Message-----
> > From: Matt D. Robinson [mailto:yakker@xxxxxxxxxxxxxx]
> > Sent: Wednesday, July 18, 2001 13:45
> > To: Hiro Sugawara
> > Cc: lkcd@xxxxxxxxxxx
> > Subject: Re: Module support
> >
> >
> > If you don't have a Kerntypes file, you should build one. It is
> > basically a .o file that includes linux/sched.h, but is built with
> > -gstabs. It should be very easy to build (and if you have the
> > LKCD patches installed, it's already built for you).
> >
> > Don't use 'vmlinux' as the Kerntypes (unless, of course, you're
> > building your entire kernel with -gstabs). Otherwise, you're going
> > to get some wierd results. :)
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