Terry Lambert's loadable kernel module support - example modules.
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svn path=/head/; revision=2128
45
share/examples/lkm/Makefile
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45
share/examples/lkm/Makefile
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@ -0,0 +1,45 @@
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# 25 May 93
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#
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# Makefile for sample programs for loadable kernel modules package (lkm)
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#
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# 05 Jun 93 Terry Lambert Added vfs, misc
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# 25 May 93 Terry Lambert Original
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#
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# Copyright (c) 1993 Terrence R. Lambert.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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||||
# are met:
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# 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.
|
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# 3. All advertising materials mentioning features or use of this software
|
||||
# must display the following acknowledgement:
|
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# This product includes software developed by Terrence R. Lambert.
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# 4. The name Terrence R. Lambert may not be used to endorse or promote
|
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# products derived from this software without specific prior written
|
||||
# permission.
|
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#
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# THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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SUBDIR= syscall vfs misc
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.include <bsd.subdir.mk>
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#
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# EOF -- This file has not been truncated.
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#
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48
share/examples/lkm/misc/Makefile
Normal file
48
share/examples/lkm/misc/Makefile
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@ -0,0 +1,48 @@
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# 25 May 93
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#
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# Makefile for sample loadable system call
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#
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# 25 May 93 Terry Lambert Original
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#
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# Copyright (c) 1993 Terrence R. Lambert.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
|
||||
# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
|
||||
# notice, this list of conditions and the following disclaimer in the
|
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# documentation and/or other materials provided with the distribution.
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# 3. All advertising materials mentioning features or use of this software
|
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# must display the following acknowledgement:
|
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# This product includes software developed by Terrence R. Lambert.
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# 4. The name Terrence R. Lambert may not be used to endorse or promote
|
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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SUBDIR= module test
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load: _SUBDIRUSE
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unload: _SUBDIRUSE
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.include <bsd.subdir.mk>
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#
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# EOF -- This file has not been truncated.
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#
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85
share/examples/lkm/misc/README
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85
share/examples/lkm/misc/README
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@ -0,0 +1,85 @@
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# Copyright (c) 1993 Terrence R. Lambert.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
|
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# 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
|
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# documentation and/or other materials provided with the distribution.
|
||||
# 3. All advertising materials mentioning features or use of this software
|
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# must display the following acknowledgement:
|
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# This product includes software developed by Terrence R. Lambert.
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# 4. The name Terrence R. Lambert may not be used to endorse or promote
|
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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1.0 Overview
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This is the README file for the sample miscellaneous module
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that mimics the loaded system call.
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A miscellaneous module may be used to load any data or
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program into the kernel that can be made available by
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modifying a table, pointer, or other kernel data to inform
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the kernel that the module should be used instead of the
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previous code/data path.
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Generally, it is assumed that a loadable module is one of
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a set of similar modules (such as a file system or console
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terminal emulation), and that the reference is through a
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table (such as vfssw[]), and that a "special" value is
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assigned to the slots which are allowed to be replaced.
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This is not enforced, so you may use the "miscellaneous"
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module any way you see fit.
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As with the loadable system calls, it may be desirable to
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allow the module loader to replace an *existing* entry to
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try out changes to kernel code without rebuilding and
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booting from the new kernel.
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2.0 Directions
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To test the module, do the following:
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cd module
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make load
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A load message (the copyright) will be printed on the console.
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cd ../test
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make load
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The system call prints a message on the console when called.
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This message will be printed when running "make load" in
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the "test" subdirectory.
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3.0 Recovering resources
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The miscellaneous module consumes 8 pages of memory when
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loaded; it can be freed up by unloading it. To unload it,
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type the following from the directory this file is in:
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cd module
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make unload
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The miscellaneous module will be unloaded by name.
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4.0 END OF DOCUMENT
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65
share/examples/lkm/misc/module/Makefile
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65
share/examples/lkm/misc/module/Makefile
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# 05 Jun 93
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#
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# Makefile for miscmod
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#
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# 05 Jun 93 Terry Lambert Original
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#
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# Copyright (c) 1993 Terrence R. Lambert.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# 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
|
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# products derived from this software without specific prior written
|
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# permission.
|
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#
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# 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
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# ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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SRCS=miscmod.c
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OBJS=$(SRCS:.c=.o)
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KSRCS=misccall.c
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KOBJS=misccall.o
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MODOBJ=combined.o
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KMOD=miscmod
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CFLAGS= -DKERNEL -I/sys/sys -I/sys
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all: $(MODOBJ)
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clean:
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rm -f $(OBJS) $(KOBJS) $(MODOBJ) $(KMOD)
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load:
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/sbin/modload -o $(KMOD) -e$(KMOD) $(MODOBJ)
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unload:
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/sbin/modunload -n $(KMOD)
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$(MODOBJ): $(OBJS) $(KOBJS)
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$(LD) -r -o $(MODOBJ) $(OBJS) $(KOBJS)
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#
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# EOF -- This file has not been truncated
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#
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77
share/examples/lkm/misc/module/misccall.c
Normal file
77
share/examples/lkm/misc/module/misccall.c
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/* 05 Jun 93*/
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/*
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* misccall.c
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*
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* 05 Jun 93 Terry Lambert Split out of newsyscall.c
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*
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* Copyright (c) 1993 Terrence R. Lambert.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 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.
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* 4. The name Terrence R. Lambert may not be used to endorse or promote
|
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
|
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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/*
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* This is the actual code for system call... it can be static because
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* we've externed it up above... the only plae it needs to be referenced
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* is the sysent we are interested in.
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*
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* To write your own system call using this as a template, you could strip
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* out this code and use the rest as a prototype module, changing only the
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* function names and the number of arguments to the call in the module
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* specific "sysent".
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*
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* You would have to use the "-R" option of "ld" to ensure a linkable file
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* if you were to do this, since you would need to combine multiple ".o"
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* files into a single ".o" file for use by "modload".
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*/
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int
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misccall( p, uap, retval)
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struct proc *p;
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void *uap;
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int retval[];
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{
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/*
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* Our new system call simply prints a message; it takes no
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* arguments.
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*/
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printf( "\nI am a loaded system call using the miscellaneous\n");
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printf( "module loader interface and a kernel printf!\n");
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printf( "I will print this message each time I am called!\n");
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return( 0); /* success (or error code from errno.h)*/
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}
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/*
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* EOF -- This file has not been truncated.
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*/
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189
share/examples/lkm/misc/module/miscmod.c
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189
share/examples/lkm/misc/module/miscmod.c
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/* 25 May 93*/
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/*
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* Makefile for miscmod
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*
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* 05 Jun 93 Terry Lambert Split mycall.c out
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* 25 May 93 Terry Lambert Original
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*
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* Copyright (c) 1993 Terrence R. Lambert.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* 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.
|
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*
|
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* 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
|
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* 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.
|
||||
*
|
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <a.out.h>
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#include <sys/file.h>
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#include <sys/errno.h>
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extern int misccall();
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/*
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* These two entries define our system call and module information. We
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* have 0 arguments to our system call.
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*/
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static struct sysent newent = {
|
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0, misccall /* # of args, function pointer*/
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};
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/*
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* Miscellaneous modules must have their own save areas...
|
||||
*/
|
||||
static struct sysent oldent; /* save are for old callslot entry*/
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||||
|
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MOD_MISC( "miscmod")
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||||
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||||
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||||
/*
|
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* This function is called each time the module is loaded or unloaded.
|
||||
* Since we are a miscellaneous module, we have to provide whatever
|
||||
* code is necessary to patch ourselves into the area we are being
|
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* loaded to change.
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*
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* For the system call table, we duplicate the code in the kern_lkm.c
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* 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).
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||||
*
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||||
* The stat information is basically common to all modules, so there
|
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* is no real issue involved with stat; we will leave it nosys(),
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||||
* cince we don't have to do anything about it.
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*/
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static int
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miscmod_handle( lkmtp, cmd)
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||||
struct lkm_table *lkmtp;
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||||
int cmd;
|
||||
{
|
||||
int i;
|
||||
struct lkm_misc *args = lkmtp->private.lkm_misc;
|
||||
int err = 0; /* default = success*/
|
||||
extern int nsysent; /* init_sysent.c*/
|
||||
extern int lkmnosys(); /* allocable slot*/
|
||||
|
||||
switch( cmd) {
|
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case LKM_E_LOAD:
|
||||
|
||||
/*
|
||||
* Don't load twice! (lkmexists() is exported by kern_lkm.c)
|
||||
*/
|
||||
if( lkmexists( lkmtp))
|
||||
return( EEXIST);
|
||||
|
||||
/*
|
||||
* This is where we would express a slot preference if
|
||||
* we had one; since we don't, we will simply duplicate
|
||||
* the "auto" code and forget the other.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Search the table looking for a slot...
|
||||
*/
|
||||
for( i = 0; i < nsysent; i++)
|
||||
if( sysent[ i].sy_call == lkmnosys)
|
||||
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], &oldent, sizeof( struct sysent));
|
||||
|
||||
/* replace with new*/
|
||||
bcopy( &newent, &sysent[ i], sizeof( struct sysent));
|
||||
|
||||
/* done!*/
|
||||
args->lkm_offset = i; /* slot in sysent[]*/
|
||||
|
||||
|
||||
/* if we make it to here, print copyright on console*/
|
||||
printf( "\nSample Loaded miscellaneous module (system call)\n");
|
||||
printf( "Copyright (c) 1993\n");
|
||||
printf( "Terrence R. Lambert\n");
|
||||
printf( "All rights reserved\n");
|
||||
|
||||
break; /* Success*/
|
||||
|
||||
case LKM_E_UNLOAD:
|
||||
/* current slot...*/
|
||||
i = args->lkm_offset;
|
||||
|
||||
/* replace current slot contents with old contents*/
|
||||
bcopy( &oldent, &sysent[ i], sizeof( struct sysent));
|
||||
|
||||
break; /* Success*/
|
||||
|
||||
default: /* we only understand load/unload*/
|
||||
err = EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
return( err);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* External entry point; should generally match name of .o file. The
|
||||
* arguments are always the same for all loaded modules. The "load",
|
||||
* "unload", and "stat" functions in "DISPATCH" will be called under
|
||||
* their respective circumstances unless their value is "nosys". If
|
||||
* called, they are called with the same arguments (cmd is included to
|
||||
* allow the use of a single function, ver is included for version
|
||||
* matching between modules and the kernel loader for the modules).
|
||||
*
|
||||
* Since we expect to link in the kernel and add external symbols to
|
||||
* the kernel symbol name space in a future version, generally all
|
||||
* functions used in the implementation of a particular module should
|
||||
* be static unless they are expected to be seen in other modules or
|
||||
* to resolve unresolved symbols alread existing in the kernel (the
|
||||
* second case is not likely to ever occur).
|
||||
*
|
||||
* The entry point should return 0 unless it is refusing load (in which
|
||||
* case it should return an errno from errno.h).
|
||||
*/
|
||||
miscmod( lkmtp, cmd, ver)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
int ver;
|
||||
{
|
||||
DISPATCH(lkmtp,cmd,ver,miscmod_handle,miscmod_handle,nosys)
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated.
|
||||
*/
|
66
share/examples/lkm/misc/test/Makefile
Normal file
66
share/examples/lkm/misc/test/Makefile
Normal file
@ -0,0 +1,66 @@
|
||||
# 05 Jun 93
|
||||
#
|
||||
# Makefile for testmisc
|
||||
#
|
||||
# 05 Jun 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
PROG= testmisc
|
||||
NOMAN=
|
||||
|
||||
load:
|
||||
@echo "This test program will call the sample system call;"
|
||||
@echo "the "offset requested will be shown as 'Off' in the"
|
||||
@echo "status display below. If no modules are loaded, an"
|
||||
@echo "error '3' will be reported."
|
||||
@echo
|
||||
@echo "The sample system call will display a message on the"
|
||||
@echo "system console each time it is run."
|
||||
@echo
|
||||
@echo
|
||||
/sbin/modstat -n miscmod
|
||||
@echo
|
||||
@./testmisc
|
||||
|
||||
unload:
|
||||
@echo "This test program will cause an error '3' if the call"
|
||||
@echo "has been successfully unloaded by building 'unload' in"
|
||||
@echo "the 'module' subdirectory."
|
||||
@echo
|
||||
/sbin/modstat -n miscmod
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated.
|
||||
#
|
62
share/examples/lkm/misc/test/testmisc.c
Normal file
62
share/examples/lkm/misc/test/testmisc.c
Normal file
@ -0,0 +1,62 @@
|
||||
/* 05 Jun 93*/
|
||||
/*
|
||||
* testmisc.c
|
||||
*
|
||||
* Test program to call the sample loaded miscellaneous system call.
|
||||
*
|
||||
* 05 Jun 93 Terry Lambert Original
|
||||
*
|
||||
*
|
||||
* 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 <stdio.h>
|
||||
|
||||
main()
|
||||
{
|
||||
char buf[ 80];
|
||||
int err = 0;
|
||||
|
||||
printf( "Table offset as reported by modstat: ");
|
||||
if( gets( buf) == NULL) {
|
||||
printf( "[ABORT]\n");
|
||||
exit( 1);
|
||||
}
|
||||
|
||||
if( err = syscall( atoi( buf) /* no arguments*/))
|
||||
perror( "syscall");
|
||||
|
||||
exit( err);
|
||||
}
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated
|
||||
*/
|
48
share/examples/lkm/syscall/Makefile
Normal file
48
share/examples/lkm/syscall/Makefile
Normal file
@ -0,0 +1,48 @@
|
||||
# 25 May 93
|
||||
#
|
||||
# Makefile for sample loadable system call
|
||||
#
|
||||
# 25 May 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
SUBDIR= module test
|
||||
|
||||
load: _SUBDIRUSE
|
||||
|
||||
unload: _SUBDIRUSE
|
||||
|
||||
.include <bsd.subdir.mk>
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated.
|
||||
#
|
65
share/examples/lkm/syscall/README
Normal file
65
share/examples/lkm/syscall/README
Normal file
@ -0,0 +1,65 @@
|
||||
# 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.
|
||||
|
||||
1.0 Overview
|
||||
|
||||
This is the README file for the sample loaded system call.
|
||||
|
||||
|
||||
2.0 Directions
|
||||
|
||||
To test the module, do the following:
|
||||
|
||||
cd module
|
||||
make load
|
||||
|
||||
A load message (the copyright) will be printed on the console.
|
||||
|
||||
cd ../test
|
||||
make load
|
||||
|
||||
The system call prints a message on the console when called.
|
||||
This message will be preinted when running "make load" in
|
||||
the "test" subdirectory.
|
||||
|
||||
|
||||
3.0 Recovering resources
|
||||
|
||||
The system call consumes 8 pages of memory when loaded; it
|
||||
can be freed up by unloading it. To unload it, type the
|
||||
following from the directory this file is in:
|
||||
|
||||
cd module
|
||||
make unload
|
||||
|
||||
The system call will be unloaded by name.
|
||||
|
||||
|
||||
4.0 END OF DOCUMENT
|
65
share/examples/lkm/syscall/module/Makefile
Normal file
65
share/examples/lkm/syscall/module/Makefile
Normal file
@ -0,0 +1,65 @@
|
||||
# 05 Jun 93
|
||||
#
|
||||
# Makefile for newsyscall
|
||||
#
|
||||
# 05 Jun 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
SRCS=newsyscall.c
|
||||
OBJS=$(SRCS:.c=.o)
|
||||
|
||||
KSRCS=mycall.c
|
||||
KOBJS=mycall.o
|
||||
|
||||
MODOBJ=combined.o
|
||||
|
||||
KMOD=newsyscall
|
||||
CFLAGS= -DKERNEL -I/sys/sys -I/sys
|
||||
|
||||
all: $(MODOBJ)
|
||||
|
||||
clean:
|
||||
rm -f $(OBJS) $(KOBJS) $(MODOBJ) $(KMOD)
|
||||
|
||||
load:
|
||||
/sbin/modload -o $(KMOD) -e$(KMOD) $(MODOBJ)
|
||||
|
||||
unload:
|
||||
/sbin/modunload -n $(KMOD)
|
||||
|
||||
$(MODOBJ): $(OBJS) $(KOBJS)
|
||||
$(LD) -r -o $(MODOBJ) $(OBJS) $(KOBJS)
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated
|
||||
#
|
76
share/examples/lkm/syscall/module/mycall.c
Normal file
76
share/examples/lkm/syscall/module/mycall.c
Normal file
@ -0,0 +1,76 @@
|
||||
/* 05 Jun 93*/
|
||||
/*
|
||||
* mycall.c
|
||||
*
|
||||
* 05 Jun 93 Terry Lambert Split out of newsyscall.c
|
||||
*
|
||||
* 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/ioctl.h>
|
||||
#include <sys/systm.h>
|
||||
|
||||
|
||||
/*
|
||||
* This is the actual code for system call... it can be static because
|
||||
* we've externed it up above... the only plae 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
|
||||
mycall( p, uap, retval)
|
||||
struct proc *p;
|
||||
void *uap;
|
||||
int retval[];
|
||||
{
|
||||
/*
|
||||
* Our new system call simply prints a message; it takes no
|
||||
* arguments.
|
||||
*/
|
||||
|
||||
printf( "\nI am a loaded system call using the kernel printf!\n");
|
||||
printf( "I will print this message each time I am called!\n");
|
||||
|
||||
return( 0); /* success (or error code from errno.h)*/
|
||||
}
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated.
|
||||
*/
|
115
share/examples/lkm/syscall/module/newsyscall.c
Normal file
115
share/examples/lkm/syscall/module/newsyscall.c
Normal file
@ -0,0 +1,115 @@
|
||||
/* 25 May 93*/
|
||||
/*
|
||||
* Makefile for newsyscall
|
||||
*
|
||||
* 05 Jun 93 Terry Lambert Split mycall.c out
|
||||
* 25 May 93 Terry Lambert Original
|
||||
*
|
||||
* 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/ioctl.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/conf.h>
|
||||
#include <sys/mount.h>
|
||||
#include <sys/exec.h>
|
||||
#include <sys/lkm.h>
|
||||
#include <a.out.h>
|
||||
#include <sys/file.h>
|
||||
#include <sys/errno.h>
|
||||
|
||||
|
||||
extern int mycall();
|
||||
|
||||
/*
|
||||
* These two entries define our system call and module information. We
|
||||
* have 0 arguments to our system call.
|
||||
*/
|
||||
static struct sysent newent = {
|
||||
0, mycall /* # of args, function pointer*/
|
||||
};
|
||||
|
||||
MOD_SYSCALL( "newsyscall", -1, &newent)
|
||||
|
||||
|
||||
/*
|
||||
* This function is called each time the module is loaded. Technically,
|
||||
* we could have made this "nosys" in the "DISPATCH" in "newsyscall()",
|
||||
* but it's a convenient place to kick a copyright out to the console.
|
||||
*/
|
||||
static int
|
||||
newsyscall_load( lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
if( cmd == LKM_E_LOAD) { /* print copyright on console*/
|
||||
printf( "\nSample Loaded system call\n");
|
||||
printf( "Copyright (c) 1993\n");
|
||||
printf( "Terrence R. Lambert\n");
|
||||
printf( "All rights reserved\n");
|
||||
}
|
||||
|
||||
return( 0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* External entry point; should generally match name of .o file. The
|
||||
* arguments are always the same for all loaded modules. The "load",
|
||||
* "unload", and "stat" functions in "DISPATCH" will be called under
|
||||
* their respective circumstances unless their value is "nosys". If
|
||||
* called, they are called with the same arguments (cmd is included to
|
||||
* allow the use of a single function, ver is included for version
|
||||
* matching between modules and the kernel loader for the modules).
|
||||
*
|
||||
* Since we expect to link in the kernel and add external symbols to
|
||||
* the kernel symbol name space in a future version, generally all
|
||||
* functions used in the implementation of a particular module should
|
||||
* be static unless they are expected to be seen in other modules or
|
||||
* to resolve unresolved symbols alread existing in the kernel (the
|
||||
* second case is not likely to ever occur).
|
||||
*
|
||||
* The entry point should return 0 unless it is refusing load (in which
|
||||
* case it should return an errno from errno.h).
|
||||
*/
|
||||
newsyscall( lkmtp, cmd, ver)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
int ver;
|
||||
{
|
||||
DISPATCH(lkmtp,cmd,ver,newsyscall_load,nosys,nosys)
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated.
|
||||
*/
|
66
share/examples/lkm/syscall/test/Makefile
Normal file
66
share/examples/lkm/syscall/test/Makefile
Normal file
@ -0,0 +1,66 @@
|
||||
# 25 May 93
|
||||
#
|
||||
# Makefile for testsyscall
|
||||
#
|
||||
# 25 May 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
PROG= testsyscall
|
||||
NOMAN=
|
||||
|
||||
load:
|
||||
@echo "This test program will call the sample system call;"
|
||||
@echo "the "offset requested will be shown as 'Off' in the"
|
||||
@echo "status display below. If no modules are loaded, an"
|
||||
@echo "error '3' will be reported."
|
||||
@echo
|
||||
@echo "The sample system call will display a message on the"
|
||||
@echo "system console each time it is run."
|
||||
@echo
|
||||
@echo
|
||||
/sbin/modstat -n newsyscall
|
||||
@echo
|
||||
@./testsyscall
|
||||
|
||||
unload:
|
||||
@echo "This test program will cause an error '3' if the call"
|
||||
@echo "has been successfully unloaded by building 'unload' in"
|
||||
@echo "the 'module' subdirectory."
|
||||
@echo
|
||||
/sbin/modstat -n newsyscall
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated.
|
||||
#
|
62
share/examples/lkm/syscall/test/testsyscall.c
Normal file
62
share/examples/lkm/syscall/test/testsyscall.c
Normal file
@ -0,0 +1,62 @@
|
||||
/* 23 May 93*/
|
||||
/*
|
||||
* testsyscall.c
|
||||
*
|
||||
* Test program to call the sample loaded system call.
|
||||
*
|
||||
* 23 May 93 Terry Lambert Original
|
||||
*
|
||||
*
|
||||
* 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 <stdio.h>
|
||||
|
||||
main()
|
||||
{
|
||||
char buf[ 80];
|
||||
int err = 0;
|
||||
|
||||
printf( "Table offset as reported by modstat: ");
|
||||
if( gets( buf) == NULL) {
|
||||
printf( "[ABORT]\n");
|
||||
exit( 1);
|
||||
}
|
||||
|
||||
if( err = syscall( atoi( buf) /* no arguments*/))
|
||||
perror( "syscall");
|
||||
|
||||
exit( err);
|
||||
}
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated
|
||||
*/
|
48
share/examples/lkm/vfs/Makefile
Normal file
48
share/examples/lkm/vfs/Makefile
Normal file
@ -0,0 +1,48 @@
|
||||
# 25 May 93
|
||||
#
|
||||
# Makefile for sample loadable file system
|
||||
#
|
||||
# 25 May 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
SUBDIR= module
|
||||
|
||||
load: _SUBDIRUSE
|
||||
|
||||
unload: _SUBDIRUSE
|
||||
|
||||
.include <bsd.subdir.mk>
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated.
|
||||
#
|
107
share/examples/lkm/vfs/README
Normal file
107
share/examples/lkm/vfs/README
Normal file
@ -0,0 +1,107 @@
|
||||
# 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.
|
||||
|
||||
1.0 Overview
|
||||
|
||||
This is the README file for the sample loaded file system.
|
||||
|
||||
|
||||
2.0 Preparation
|
||||
|
||||
To use this module, you must have a kernel the does *NOT*
|
||||
have an existing "kernfs" file system in it. To determine
|
||||
if your system has the "kernfs" file system in it, check
|
||||
the build file for your kernel (usually this file is named
|
||||
"/sys/i386/conf/GENERICISA") for the following:
|
||||
|
||||
options KERNFS
|
||||
|
||||
By default, NetBSD has this file system compiled as part
|
||||
of the kernel; if you wish to use this example with NetBSD
|
||||
you will have to remove this "options" line and rebuild
|
||||
your kernel.
|
||||
|
||||
Note: The file "/usr/include/sys/mount.h" must have the
|
||||
"kernfs" file system type in it for this example; if you
|
||||
do not have the following line in this file, you will not
|
||||
be able to use this example:
|
||||
|
||||
#define MOUNT_KERNFS 7
|
||||
|
||||
This line is created by applying the "kernfs" patches to
|
||||
your system. NetBSD as distributed already has these
|
||||
patches applied; if you are running vanilla 386BSD, you
|
||||
will have to locate and add these patches to use this
|
||||
example.
|
||||
|
||||
|
||||
3.0 Directions
|
||||
|
||||
To test the module, do the following:
|
||||
|
||||
cd module
|
||||
make load
|
||||
|
||||
A load message (the copyright) will be printed on the console.
|
||||
|
||||
You must then add the following line to the "/etc/fstab" file:
|
||||
|
||||
kernfs /kern kernfs rw 1 1
|
||||
|
||||
At the root prompt, type the following:
|
||||
|
||||
mkdir /kern
|
||||
|
||||
Ignore the following error if it occurs:
|
||||
|
||||
mkdir: /kern: File exists
|
||||
|
||||
Again at the root prompt, type the following command:
|
||||
|
||||
mount /kern
|
||||
cd /kern
|
||||
cat version
|
||||
|
||||
This will verify that the module is working correctly.
|
||||
|
||||
|
||||
4.0 Recovering resources
|
||||
|
||||
The file system consumes 8 pages of memory when loaded; it
|
||||
can be freed up by unloading it. To unload it, type the
|
||||
following from the directory this file is in:
|
||||
|
||||
cd module
|
||||
make unload
|
||||
|
||||
The file system will be unloaded by name.
|
||||
|
||||
|
||||
5.0 END OF DOCUMENT
|
71
share/examples/lkm/vfs/module/Makefile
Normal file
71
share/examples/lkm/vfs/module/Makefile
Normal file
@ -0,0 +1,71 @@
|
||||
# 05 Jun 93
|
||||
#
|
||||
# Makefile for newsyscall
|
||||
#
|
||||
# 05 Jun 93 Terry Lambert Original
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
SRCS=kernfsmod.c
|
||||
OBJS=$(SRCS:.c=.o)
|
||||
|
||||
KSRCS=/sys/miscfs/kernfs/kernfs_vfsops.c /sys/miscfs/kernfs/kernfs_vnops.c
|
||||
KOBJS=kernfs_vfsops.o kernfs_vnops.o
|
||||
|
||||
MODOBJ=combined.o
|
||||
|
||||
KMOD=kernfsmod
|
||||
CFLAGS= -DKERNEL -I/sys/sys -I/sys
|
||||
|
||||
all: $(MODOBJ)
|
||||
|
||||
clean:
|
||||
rm -f $(OBJS) $(KOBJS) $(MODOBJ) $(KMOD)
|
||||
|
||||
load:
|
||||
/sbin/modload -o $(KMOD) -e$(KMOD) $(MODOBJ)
|
||||
|
||||
unload:
|
||||
/sbin/modunload -n $(KMOD)
|
||||
|
||||
kernfs_vfsops.o: /sys/miscfs/kernfs/kernfs_vfsops.c
|
||||
$(CC) $(CFLAGS) -c -O $@ $<
|
||||
|
||||
kernfs_vnops.o: /sys/miscfs/kernfs/kernfs_vnops.c
|
||||
$(CC) $(CFLAGS) -c -O $@ $<
|
||||
|
||||
$(MODOBJ): $(OBJS) $(KOBJS)
|
||||
$(LD) -r -o $(MODOBJ) $(OBJS) $(KOBJS)
|
||||
|
||||
#
|
||||
# EOF -- This file has not been truncated
|
||||
#
|
127
share/examples/lkm/vfs/module/kernfsmod.c
Normal file
127
share/examples/lkm/vfs/module/kernfsmod.c
Normal file
@ -0,0 +1,127 @@
|
||||
/* 05 Jun 93*/
|
||||
/*
|
||||
* kernfsmod.c
|
||||
*
|
||||
* 05 Jun 93 Terry Lambert Original
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
*/
|
||||
#define printf I_HATE_ANSI
|
||||
#include <stdio.h>
|
||||
#undef printf
|
||||
#include <stdlib.h>
|
||||
#include <sys/param.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/conf.h>
|
||||
#include <sys/mount.h>
|
||||
#include <sys/exec.h>
|
||||
#include <sys/lkm.h>
|
||||
#include <a.out.h>
|
||||
#include <sys/file.h>
|
||||
#include <sys/errno.h>
|
||||
|
||||
/*
|
||||
* This is the vfsops table from /sys/miscfs/kernfs/kernfs_vfsops.c
|
||||
*/
|
||||
extern struct vfsops kernfs_vfsops;
|
||||
|
||||
/*
|
||||
* Currently, the mount system call is broken in the way it operates
|
||||
* and the vfssw[] table does not have a character string identifier
|
||||
* for the file system type; therefore, to remount a file system after
|
||||
* it has been mounted in the first place, the offset into the table
|
||||
* must be the same; this will be corrected in future patches, but
|
||||
* not right now. At the same time the fstab format will need to
|
||||
* change to allow definition without mount of file systems.
|
||||
*
|
||||
* The flags field is a parameter to the init; this could be used to
|
||||
* change the file system operation: for instance, in ISOFS, this
|
||||
* could be used to enable/disable Rockridge extensions.
|
||||
*/
|
||||
MOD_VFS("kernfs",MOUNT_KERNFS,0,&kernfs_vfsops)
|
||||
|
||||
/*
|
||||
* This function is called each time the module is loaded. Technically,
|
||||
* we could have made this "nosys" in the "DISPATCH" in "kernfsmod()",
|
||||
* but it's a convenient place to kick a copyright out to the console.
|
||||
*/
|
||||
static int
|
||||
kernfsmod_load( lkmtp, cmd)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
{
|
||||
if( cmd == LKM_E_LOAD) { /* print copyright on console*/
|
||||
printf( "\nSample Loaded file system\n");
|
||||
printf( "Copyright (c) 1990, 1992 Jan-Simon Pendry\n");
|
||||
printf( "All rights reserved.\n");
|
||||
printf( "\nLoader stub and module loader is\n");
|
||||
printf( "Copyright (c) 1993\n");
|
||||
printf( "Terrence R. Lambert\n");
|
||||
printf( "All rights reserved\n");
|
||||
}
|
||||
|
||||
return( 0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* External entry point; should generally match name of .o file. The
|
||||
* arguments are always the same for all loaded modules. The "load",
|
||||
* "unload", and "stat" functions in "DISPATCH" will be called under
|
||||
* their respective circumstances unless their value is "nosys". If
|
||||
* called, they are called with the same arguments (cmd is included to
|
||||
* allow the use of a single function, ver is included for version
|
||||
* matching between modules and the kernel loader for the modules).
|
||||
*
|
||||
* Since we expect to link in the kernel and add external symbols to
|
||||
* the kernel symbol name space in a future version, generally all
|
||||
* functions used in the implementation of a particular module should
|
||||
* be static unless they are expected to be seen in other modules or
|
||||
* to resolve unresolved symbols alread existing in the kernel (the
|
||||
* second case is not likely to ever occur).
|
||||
*
|
||||
* The entry point should return 0 unless it is refusing load (in which
|
||||
* case it should return an errno from errno.h).
|
||||
*/
|
||||
kernfsmod( lkmtp, cmd, ver)
|
||||
struct lkm_table *lkmtp;
|
||||
int cmd;
|
||||
int ver;
|
||||
{
|
||||
DISPATCH(lkmtp,cmd,ver,kernfsmod_load,nosys,nosys)
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* EOF -- This file has not been truncated.
|
||||
*/
|
Loading…
Reference in New Issue
Block a user