diff options
Diffstat (limited to 'share/examples/kld/misc/module')
| -rw-r--r-- | share/examples/kld/misc/module/Makefile | 87 | ||||
| -rw-r--r-- | share/examples/kld/misc/module/misccall.c | 100 | ||||
| -rw-r--r-- | share/examples/kld/misc/module/misccall.h | 71 | ||||
| -rw-r--r-- | share/examples/kld/misc/module/miscmod.c | 197 |
4 files changed, 455 insertions, 0 deletions
diff --git a/share/examples/kld/misc/module/Makefile b/share/examples/kld/misc/module/Makefile new file mode 100644 index 0000000..30eeb84 --- /dev/null +++ b/share/examples/kld/misc/module/Makefile @@ -0,0 +1,87 @@ +# 08 Nov 1998 +# +# Makefile for miscmod +# +# 08 Nov 1998 Rajesh Vaidheeswarran - adapted from the lkm module Makefile +# +# Copyright (c) 1998 Rajesh Vaidheeswarran +# 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. +# 3. All advertising materials mentioning features or use of this software +# must display the following acknowledgement: +# This product includes software developed by Rajesh Vaidheeswarran. +# 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote +# products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``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 RAJESH VAIDHEESWARRAN 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. +# +# +# Copyright (c) 1993 Terrence R. Lambert. +# 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. +# 3. All advertising materials mentioning features or use of this software +# must display the following acknowledgement: +# This product includes software developed by Terrence R. Lambert. +# 4. The name Terrence R. Lambert may not be used to endorse or promote +# products derived from this software without specific prior written +# permission. +# +# THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. +# +# $Id: Makefile,v 1.5 1998/11/08 22:31:00 rv Exp $ +# +BINDIR = /tmp +SRCS = misccall.c miscmod.c +KMOD = misc_mod +NOMAN = t +KLDMOD = t + +KLDLOAD = /sbin/kldload +KLDUNLOAD = /sbin/kldunload + +CLEANFILES+= ${KMOD} + +load: + ${KLDLOAD} -v ./${KMOD} + +unload: + ${KLDUNLOAD} -v -n ${KMOD} + +.include <bsd.kmod.mk> diff --git a/share/examples/kld/misc/module/misccall.c b/share/examples/kld/misc/module/misccall.c new file mode 100644 index 0000000..891f110 --- /dev/null +++ b/share/examples/kld/misc/module/misccall.c @@ -0,0 +1,100 @@ +/* 08 Nov 1998*/ +/* + * misccall.c + * + * 08 Nov 1998 Rajesh Vaidheeswarran adapted from the lkm misc module. + * + * Copyright (c) 1998 Rajesh Vaidheeswarran + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Rajesh Vaidheeswarran. + * 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``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 RAJESH VAIDHEESWARRAN 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. + * + * + * Copyright (c) 1993 Terrence R. Lambert. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Terrence R. Lambert. + * 4. The name Terrence R. Lambert may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. + */ +#include "misccall.h" + +/* + * This is the actual code for the system call... it can't be static because + * it is exported to another part of the module... the only place it needs + * to be referenced is the sysent we are interested in. + * + * To write your own system call using this as a template, you could strip + * out this code and use the rest as a prototype module, changing only the + * function names and the number of arguments to the call in the module + * specific "sysent". + * + * You would have to use the "-R" option of "ld" to ensure a linkable file + * if you were to do this, since you would need to combine multiple ".o" + * files into a single ".o" file for use by "modload". + */ +int +misccall(p, uap) +struct proc * p; +void * uap; +{ + /* + * Our new system call simply prints a message; it takes no + * arguments. + */ + + printf("\nI am a loaded system call.\n"); + printf("I was loaded using the kld interface.\n"); + printf("I don't do anything except call the kernel's printf().\n"); + printf("I will print this message each time I am called!\n"); + + return(0); /* success (or error code from errno.h)*/ +} diff --git a/share/examples/kld/misc/module/misccall.h b/share/examples/kld/misc/module/misccall.h new file mode 100644 index 0000000..ce36e53 --- /dev/null +++ b/share/examples/kld/misc/module/misccall.h @@ -0,0 +1,71 @@ +/* 08 Nov 1998*/ +/* + * misccall.h + * + * 08 Nov 1998 Rajesh Vaidheeswarran + * + * Copyright (c) 1998 Rajesh Vaidheeswarran + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Rajesh Vaidheeswarran. + * 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``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 RAJESH VAIDHEESWARRAN 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. + * + * + * Copyright (c) 1993 Terrence R. Lambert. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Terrence R. Lambert. + * 4. The name Terrence R. Lambert may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. + */ +#include <sys/param.h> +#include <sys/systm.h> + +extern int misccall __P((struct proc *p, void *uap)); diff --git a/share/examples/kld/misc/module/miscmod.c b/share/examples/kld/misc/module/miscmod.c new file mode 100644 index 0000000..07be90f --- /dev/null +++ b/share/examples/kld/misc/module/miscmod.c @@ -0,0 +1,197 @@ +/* 08 Nov 1998*/ +/* + * miscmod.c + * + * 08 Nov 1998 Rajesh Vaidheeswarran - adapted from the lkm miscmod.c + * + * Copyright (c) 1998 Rajesh Vaidheeswarran + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Rajesh Vaidheeswarran. + * 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``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 RAJESH VAIDHEESWARRAN 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. + * + * + * Copyright (c) 1993 Terrence R. Lambert. + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Terrence R. Lambert. + * 4. The name Terrence R. Lambert may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. + */ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/sysproto.h> +#include <sys/exec.h> +#include <sys/sysent.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/conf.h> + +#include "misccall.h" + +/* + * These two entries define our system call and module information. We + * have 0 arguments to our system call. + */ +static struct sysent newent = { + 0, misccall /* # of args, function pointer*/ +}; + +/* + * Miscellaneous modules must have their own save areas... + */ +static struct sysent oldent; /* save area for old callslot entry*/ + +/* + * Number of syscall entries for a.out executables + */ +#define nsysent (aout_sysvec.sv_size) + +/* + * If you have a data structure to pass ... + */ + +typedef struct misc_data { + char name[20]; + struct sysent * nent; + struct sysent * oent; + int offset; +} misc_data_t; + +static misc_data_t misc_arg = { + "misccall", + &newent, + &oldent, + -1 +}; + +static int misc_load(module_t, modeventtype_t, void *); + +static moduledata_t misc_mod = { + "misc_mod", + misc_load, + (void *)&misc_arg /* This is our real data */ +}; + +/* + * This function is called each time the module is loaded or unloaded. + * + * For the system call table, we duplicate the code in the kern_lkm.c + * file for patching into the system call table. We can tell what + * has been allocated, etc. by virtue of the fact that we know the + * criteria used by the system call loader interface. We still + * kick out the copyright to the console here (to give an example). + */ +static int +misc_load(mod, cmd, arg) + module_t mod; + modeventtype_t cmd; + void * arg; +{ + int i, err = 0; + + misc_data_t * args = (misc_data_t *)arg; + + switch (cmd) { + case MOD_LOAD: + + /* + * Search the table looking for a slot... + */ + for(i = 1; i < nsysent; i++) + if(sysent[i].sy_call == (sy_call_t *)nosys) + break; /* found it!*/ + /* out of allocable slots?*/ + if(i == nsysent) { + err = ENFILE; + break; + } + + /* save old -- we must provide our own data area*/ + bcopy(&sysent[i], args->oent, sizeof(struct sysent)); + + /* replace with new*/ + bcopy(args->nent, &sysent[i], sizeof(struct sysent)); + + /* done!*/ + args->offset = i; /* slot in sysent[]*/ + + + /* if we make it to here, print copyright on console*/ + printf("\nSample Loaded kld module (system call)\n"); + printf("Copyright (c) 1998\n"); + printf("Rajesh Vaidheeswarran\n"); + printf("All rights reserved\n"); + printf("System call %s loaded into slot %d\n", args->name, + args->offset); + break; /* Success*/ + + case MOD_UNLOAD: + /* current slot...*/ + i = args->offset; + + /* replace current slot contents with old contents*/ + bcopy(args->oent, &sysent[ i], sizeof( struct sysent)); + + printf("Unloaded kld module (system call)\n"); + + break; /* Success*/ + + default: /* we only understand load/unload*/ + err = EINVAL; + break; + } + + return(err); +} + +/* Now declare the module to the system */ + +DECLARE_MODULE(misc, misc_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE); |
