customize floppies

Björn König bkoenig at
Mon Jan 29 16:02:37 UTC 2007

Oliver Koch schrieb:
> Hello,
> is it possible to customize the kernel in the images of the kernel
> floppies (kern1.flp, kern2.flp, kern3.flp) for FreeBSD 6.2? I need a
> custom kernel with a special kernel option for my bge network interface
> (BGE_FAKE_AUTONEG) to get network access on my Intel Blade.
> Thanks in advance!

You can modify the existing floppy images. boot.flp contains the first 
part of the kernel and kern*.flp the further parts.

Build a custom kernel using

   makeoptions MODULES_OVERRIDE=""

in your kernel configuration file.

   # cd /usr/src/sys/i386/conf
   # config YOURKERNEL
   # cd ../compile
   # make cleandepend; make depend
   # make

Take your kernel file and compress it:

   # gzip -9nc kernel > kernel.gz

Now you can use the '' script from src/release/scripts to 
split the compressed kernel into parts.

   # /usr/src/release/scripts/ kernel.gz destdir 1392 Kernel

You can mount a floppy disk image with the following commands:

   # mdconfig -af boot.flp
   # mount /dev/md45 /mnt

Replace the kernel parts with your own.

I hope this helps. I havn't tested it before. There are other ways that 
are more elegant.


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