$NetBSD: README,v 1.3 2015/05/15 06:21:12 pgoyette Exp $
Kernel Developer's Manual
DESCRIPTION
The kernel example dynamic modules.
This directory contains the following example modules:
* hello - the simplest `hello world' module
* properties - handle incoming properties during the module load
* readhappy - basic implementation of read(9) with happy numbers
* ping - basic ioctl(9)
* luahello - the simplest `hello world' Lua module
To build the examples you need a local copy of NetBSD sources. You also
need the comp set with toolchain. To build the module just enter a
directory with example modules and use make(1):
# make
To load, unload, and stat the module use modload(8), modunload(8) and
modstat(8).
The S parameter in the Makefile files points to src/sys and it can be
overloaded in this way:
# make S=/data/netbsd/src/sys
The code of a module does not need to be in src/sys unless you use
the autoconf(9) framework.
A cross-built of a module for a target platform is possible with the
build.sh framework. You need to generate the toolchain and set
appropriately PATH to point bin/ in the TOOLDIR path. An example command
to cross-build a module with the amd64 toolchain is as follows:
# nbmake-amd64 S=/data/netbsd/src/sys
The example modules should not be used on a production machine.
All modules that create a cdevsw should be verified that the major number
should not conflict with a real device.
SEE ALSO
modctl(2), module(7), modload(8), modstat(8), modunload(8), module(9),
intro(9lua)
HISTORY
An example of handling incoming properties first appeared in NetBSD 5.0
and was written by Julio Merino with further modifications by Martin
Husemann, Adam Hamsik, John Nemeth and Mindaugas Rasiukevicius.
This document and additional modules (hello, readhappy, properties,
ping, and luahello) first appeared in NetBSD 8.0; they were written
by Kamil Rytarowski.
AUTHORS
This document was written by Kamil Rytarowski.
