NetBSD/sys/lkm

$NetBSD: README,v 1.2 1999/08/25 00:59:08 ross Exp $

Based on some examples in /usr/share/lkm, I have started adding
loadable modules for some portions of NetBSD I don't think should
require a kernel rebuild to install.

So far, I have added the following:

	cd9660
	fdesc
	kernfs	(slightly different than in /usr/share/lkm)
	msdosfs
	mfs
	nullfs
	portal
	procfs
	umapfs
	union

Building and Testing
--------------------

mkdir /usr/lkm (if it's not there)
	make depend && make && make install

Then, to install cd9660, for example, type:
	modload -v -e cd9660_lkmentry -o /var/run/lkm.cd9660 /usr/lkm/cd9660.o
	(or "make load" in the correct directory)

To remove it from memory, type:
	modunload -n cd9660
	(or "make unload" in the correct directory)

Notes
-----

Currently there is no symbol table management so the in-kernel debugger will
lose.

The LKM interface will (hopefully) be changing into something more usable.
If you use these files as a reference, you might have to change your
code if you want to use the new interface.  I expect the old one to be
supported if it is possible to do so.

COMPAT modules
--------------

The FreeBSD module DOES load, but it will not work without other kernel
modifications.

The Linux module compiles, and also requires other kernel modifications
to run.  It has not been tested.

VFS modules
-----------

These are somewhat tested.  Since this whole system is still under
development use these at your own risk.

Type    Id  Off Loadaddr Size Info     Rev Module Name
VFS       0  21 f873d000 0020 f8744000   1 msdosfs
VFS       1  20 f8746000 000c f8748000   1 procfs
VFS       2  19 f8839000 0008 f883a000   1 kernfs
VFS       3  18 f883b000 0008 f883c000   1 nullfs
VFS       4  17 f8840000 000c f8842000   1 fdesc
VFS       5  16 f8843000 0008 f8844000   1 portal
VFS       6  15 f8845000 000c f8847000   1 umapfs
VFS       7  14 f8848000 0014 f884c000   1 union
VFS       8  13 f884d000 0008 f884e000   1 mfs

--Michael <explorer@flame.org>