Date: Tue, 16 Jul 2002 17:58:24 -0400 From: W Gerald Hicks <gehicks@gehicks.dyndns.org> To: Peter Wemm <peter@wemm.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/release/picobsd/build write_mfs_in_kernel.c Message-ID: <267C26FC-9907-11D6-99DB-0030657B5F1E@gehicks.dyndns.org> In-Reply-To: <20020716181501.C69CB3910@overcee.wemm.org>
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On Tuesday, July 16, 2002, at 02:15 PM, Peter Wemm wrote:
[snips]
> Whatever works. :-)
>
Yeah :-)
> I like the --add-section approach personally because it adapts
> automatically to the file format being used and seems to need less
> comamnd
> line args.
>
Heh, I'm doing it your way now. My fingers thank you.
> However, it requires doing things a bit differently. I used to use it
> as a
> final pre-link stage on one file, but I suppose creating the .o file
> directly makes it easier from a Makefile perspective.
>
I've got this hack here where I've modified config(8) to allow
a alternate set of sys/conf files where I've created a
makeoption RLINK_KERNEL="foo" to illustrate how to do it
without a statically reserved area.
I've dropped option MD_ROOT_SIZE in favor of a new
makeoption MD_ROOT_IMAGE="mdimage.o" which
gets linked on a 'make final' to replace weak symbols
in my patched md.c
('make prelim' builds a partially linked kernel in this scheme)
> I used to do things like this:
> mdroot.o: mdroot.dd mdroot_driver.o
> objcopy --add_section mdroot=mdroot.dd ....
>
> mdroot_driver.o: md.c
> ... etc
>
> And the build used the resulting mdroot.o with the binary embedded in
> it.
>
yeah, that's pretty much what we do here.
> Anyway, it is good to know that there is more than one way to do it and
> that
> the evil write_mfs_in_kernel can finally be laid to rest for good.
>
Amen!
Cheers,
Jerry Hicks
gehicks@gehicks.dyndns.org
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