1*43a90889SApple OSS Distributions /*
2*43a90889SApple OSS Distributions * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3*43a90889SApple OSS Distributions *
4*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*43a90889SApple OSS Distributions *
6*43a90889SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*43a90889SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*43a90889SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*43a90889SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*43a90889SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*43a90889SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*43a90889SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*43a90889SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*43a90889SApple OSS Distributions *
15*43a90889SApple OSS Distributions * Please obtain a copy of the License at
16*43a90889SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*43a90889SApple OSS Distributions *
18*43a90889SApple OSS Distributions * The Original Code and all software distributed under the License are
19*43a90889SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*43a90889SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*43a90889SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*43a90889SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*43a90889SApple OSS Distributions * Please see the License for the specific language governing rights and
24*43a90889SApple OSS Distributions * limitations under the License.
25*43a90889SApple OSS Distributions *
26*43a90889SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*43a90889SApple OSS Distributions */
28*43a90889SApple OSS Distributions /*
29*43a90889SApple OSS Distributions * Subtle combination of files and libraries make up the C++ runtime system for kernel modules. We are dependant on the KernelModule kmod.make and CreateKModInfo.perl scripts to be exactly instep with both this library module and the libkmod module as well.
30*43a90889SApple OSS Distributions *
31*43a90889SApple OSS Distributions * If you do any maintenance on any of the following files make sure great care is taken to keep them in Sync.
32*43a90889SApple OSS Distributions * KernelModule.bproj/kmod.make
33*43a90889SApple OSS Distributions * KernelModule.bproj/CreateKModInfo.perl
34*43a90889SApple OSS Distributions * KernelModule.bproj/kmodc++/pure.c
35*43a90889SApple OSS Distributions * KernelModule.bproj/kmodc++/cplus_start.c
36*43a90889SApple OSS Distributions * KernelModule.bproj/kmodc++/cplus_start.c
37*43a90889SApple OSS Distributions * KernelModule.bproj/kmodc/c_start.c
38*43a90889SApple OSS Distributions * KernelModule.bproj/kmodc/c_stop.c
39*43a90889SApple OSS Distributions *
40*43a90889SApple OSS Distributions * The trick is that the linkline links all of the developers modules. If any static constructors are used .constructors_used will be left as an undefined symbol. This symbol is exported by the cplus_start.c routine which automatically brings in the appropriate C++ _start routine. However the actual _start symbol is only required by the kmod_info structure that is created and initialized by the CreateKModInfo.perl script. If no C++ was used the _start will be an undefined symbol that is finally satisfied by the c_start module in the kmod library.
41*43a90889SApple OSS Distributions *
42*43a90889SApple OSS Distributions * The linkline must look like this.
43*43a90889SApple OSS Distributions *.o -lkmodc++ kmod_info.o -lkmod
44*43a90889SApple OSS Distributions */
45*43a90889SApple OSS Distributions #include <mach/mach_types.h>
46*43a90889SApple OSS Distributions
47*43a90889SApple OSS Distributions // These global symbols will be defined by CreateInfo script's info.c file.
48*43a90889SApple OSS Distributions extern kmod_stop_func_t *_antimain;
49*43a90889SApple OSS Distributions
50*43a90889SApple OSS Distributions __private_extern__ kern_return_t
_stop(kmod_info_t * ki,void * data)51*43a90889SApple OSS Distributions _stop(kmod_info_t *ki, void *data)
52*43a90889SApple OSS Distributions {
53*43a90889SApple OSS Distributions if (_antimain) {
54*43a90889SApple OSS Distributions return (*_antimain)(ki, data);
55*43a90889SApple OSS Distributions } else {
56*43a90889SApple OSS Distributions return KERN_SUCCESS;
57*43a90889SApple OSS Distributions }
58*43a90889SApple OSS Distributions }
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