DECLARE_MODULE(9) BSD Kernel Developer's Manual DECLARE_MODULE(9)NAMEDECLARE_MODULE — kernel module declaration macro
SYNOPSIS
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
DECLARE_MODULE(name, moduledata_t data, sub, order);
DESCRIPTION
The DECLARE_MODULE() macro declares a generic kernel module. It is used
to register the module with the system, using the SYSINIT() macro.
DECLARE_MODULE() is usually used within other macros, such as
DRIVER_MODULE(9), DEV_MODULE(9) and SYSCALL_MODULE(9). Of course, it can
also be called directly, for example in order to implement dynamic
sysctls.
The arguments it expects are:
name The module name, which will be used in the SYSINIT() call to
identify the module.
data A moduledata_t structure, which contains two main items, the
official name of the module name, which will be used in the
module_t structure and a pointer to the event handler function of
type modeventhand_t.
sub An argument directed to the SYSINIT() macro. Valid values for
this are contained in the sysinit_sub_id enumeration (see
<sys/kernel.h>) and specify the type of system startup inter‐
faces. The DRIVER_MODULE(9) macro uses a value of SI_SUB_DRIVERS
here for example, since these modules contain a driver for a
device. For kernel modules that are loaded at runtime, a value
of SI_SUB_EXEC is common.
order An argument for SYSINIT(). It represents the KLDs order of ini‐
tialization within the subsystem. Valid values are defined in
the sysinit_elem_order enumeration (<sys/kernel.h>).
SEE ALSODEV_MODULE(9), DRIVER_MODULE(9), module(9), SYSCALL_MODULE(9)
/usr/include/sys/kernel.h, /usr/share/examples/kld
AUTHORS
This manual page was written by Alexander Langer ⟨alex@FreeBSD.org⟩,
inspired by the KLD Facility Programming Tutorial by Andrew Reiter
⟨arr@watson.org⟩.
BSD January 6, 2005 BSD
