diff options
Diffstat (limited to 'share/examples/kld/syscall/module')
-rw-r--r-- | share/examples/kld/syscall/module/Makefile | 7 | ||||
-rw-r--r-- | share/examples/kld/syscall/module/syscall.c | 87 |
2 files changed, 94 insertions, 0 deletions
diff --git a/share/examples/kld/syscall/module/Makefile b/share/examples/kld/syscall/module/Makefile new file mode 100644 index 000000000000..17066d141fce --- /dev/null +++ b/share/examples/kld/syscall/module/Makefile @@ -0,0 +1,7 @@ +# Makefile for building the sample syscall module +# $FreeBSD$ + +KMOD= syscall +SRCS= syscall.c + +.include <bsd.kmod.mk> diff --git a/share/examples/kld/syscall/module/syscall.c b/share/examples/kld/syscall/module/syscall.c new file mode 100644 index 000000000000..3416f3ca10a0 --- /dev/null +++ b/share/examples/kld/syscall/module/syscall.c @@ -0,0 +1,87 @@ +/*- + * Copyright (c) 1999 Assar Westerlund + * All rights reserved. + * + * 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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. + * + * $FreeBSD$ + */ + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/proc.h> +#include <sys/module.h> +#include <sys/sysproto.h> +#include <sys/sysent.h> +#include <sys/kernel.h> +#include <sys/systm.h> + +/* + * The function for implementing the syscall. + */ + +static int +hello (struct thread *td, void *arg) +{ + printf ("hello kernel\n"); + return 0; +} + +/* + * The `sysent' for the new syscall + */ + +static struct sysent hello_sysent = { + 0, /* sy_narg */ + hello /* sy_call */ +}; + +/* + * The offset in sysent where the syscall is allocated. + */ + +static int offset = NO_SYSCALL; + +/* + * The function called at load/unload. + */ + +static int +load (struct module *module, int cmd, void *arg) +{ + int error = 0; + + switch (cmd) { + case MOD_LOAD : + printf ("syscall loaded at %d\n", offset); + break; + case MOD_UNLOAD : + printf ("syscall unloaded from %d\n", offset); + break; + default : + error = EOPNOTSUPP; + break; + } + return error; +} + +SYSCALL_MODULE(syscall, &offset, &hello_sysent, load, NULL); |