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Add SYSCALL_MODULE.9, a manpage for the SYSCALL_MODULE wrapper macro

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for syscall klds.

Some text of this manpage is based on the comments in the example
syscall module written by Assar Westerlund.

Reviewed by:	ru
This commit is contained in:
Alexander Langer 2001-04-28 13:18:40 +00:00
parent 6157b69f4a
commit 50c39ea7a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=76101
2 changed files with 79 additions and 1 deletions
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share/man/man9/Makefile
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# $FreeBSD$
MAN= CONDSPLASSERT.9 DECLARE_MODULE.9 DELAY.9 DEV_MODULE.9 KASSERT.9 MD5.9 \
MODULE_DEPEND.9 MODULE_VERSION.9 SPLASSERT.9 \
MODULE_DEPEND.9 MODULE_VERSION.9 SPLASSERT.9 SYSCALL_MODULE.9 \
VFS.9 VFS_FHTOVP.9 VFS_INIT.9 VFS_MOUNT.9 VFS_QUOTACTL.9 \
VFS_ROOT.9 VFS_START.9 VFS_STATFS.9 VFS_SYNC.9 VFS_UNMOUNT.9 \
VFS_VGET.9 VFS_VPTOFH.9 VFS_CHECKEXP.9 \

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share/man/man9/SYSCALL_MODULE.9 Normal file
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.\" -*- nroff -*-
.\"
.\" Copyright (c) 2001 Alexander Langer
.\"
.\" All rights reserved.
.\"
.\" This program is free software.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd April 27, 2001
.Dt SYSCALL_MODULE 9
.Os
.Sh NAME
.Nm SYSCALL_MODULE
.Nd syscall kernel module declaration macro
.Sh SYNOPSIS
.Fd #include <sys/proc.h>
.Fd #include <sys/module.h>
.Fd #include <sys/sysent.h>
.Fn SYSCALL_MODULE name "int *offset" "struct sysent new_sysent" "modeventhand_t evh" "void *arg"
.Sh DESCRIPTION
The
.Fn SYSCALL_MODULE
macro declares a new syscall.
.Fn SYSCALL_MODULE
expands into a kernel module declaration named as
.Fa name .
.Pp
.Fa offset
is a pointer to an
.Vt int
which saves the offset in
.Vt "struct sysent"
where the
syscall is allocated.
.Pp
.Fa new_sysent
specifies the function and the number of arguments this function
needs (see
.Aq Pa sys/sysent.h ) .
.Pp
.Fa evh
is a pointer to the kernel module event handler function with the argument
.Fa arg .
Please refer to
.Xr module 9
for more information.
.Sh EXAMPLES
A minimal example for a syscall module can be found in
.Pa /usr/share/examples/kld/syscall/module/syscall.c .
.Sh SEE ALSO
.Xr module 9
.Pp
.Pa /usr/share/examples/kld/syscall/module/syscall.c
.Sh AUTHORS
This manual page was written by
.An Alexander Langer Aq alex@FreeBSD.org .