X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ff6e181ae92fc6f1e89841290f461d1f2f9badd9..HEAD:/libkern/kmod/c_start.c?ds=inline diff --git a/libkern/kmod/c_start.c b/libkern/kmod/c_start.c index 069927368..a694750e4 100644 --- a/libkern/kmod/c_start.c +++ b/libkern/kmod/c_start.c @@ -1,15 +1,20 @@ /* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. - * + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -17,35 +22,65 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* - 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. - - If you do any maintenance on any of the following files make sure great care is taken to keep them in Sync. - KernelModule.bproj/kmod.make - KernelModule.bproj/CreateKModInfo.perl - KernelModule.bproj/kmodc++/pure.c - KernelModule.bproj/kmodc++/cplus_start.c - KernelModule.bproj/kmodc++/cplus_start.c - KernelModule.bproj/kmodc/c_start.c - KernelModule.bproj/kmodc/c_stop.c - - 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. - - The linkline must look like this. - *.o -lkmodc++ kmod_info.o -lkmod + * 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. + * + * If you do any maintenance on any of the following files make sure great care is taken to keep them in Sync. + * KernelModule.bproj/kmod.make + * KernelModule.bproj/CreateKModInfo.perl + * KernelModule.bproj/kmodc++/pure.c + * KernelModule.bproj/kmodc++/cplus_start.c + * KernelModule.bproj/kmodc++/cplus_start.c + * KernelModule.bproj/kmodc/c_start.c + * KernelModule.bproj/kmodc/c_stop.c + * + * 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. + * + * The linkline must look like this. + *.o -lkmodc++ kmod_info.o -lkmod */ #include +#include // These global symbols will be defined by CreateInfo script's info.c file. extern kmod_start_func_t *_realmain; +extern kmod_info_t KMOD_INFO_NAME; + +/********************************************************************* +*********************************************************************/ +__private_extern__ kern_return_t +_start(kmod_info_t *ki, void *data) +{ + if (_realmain) { + return (*_realmain)(ki, data); + } else { + return KERN_SUCCESS; + } +} + +/********************************************************************* +*********************************************************************/ +__private_extern__ const char * +OSKextGetCurrentIdentifier(void) +{ + return KMOD_INFO_NAME.name; +} + +/********************************************************************* +*********************************************************************/ +__private_extern__ const char * +OSKextGetCurrentVersionString(void) +{ + return KMOD_INFO_NAME.version; +} -__private_extern__ kern_return_t _start(kmod_info_t *ki, void *data) +/********************************************************************* +*********************************************************************/ +__private_extern__ OSKextLoadTag +OSKextGetCurrentLoadTag(void) { - if (_realmain) - return (*_realmain)(ki, data); - else - return KERN_SUCCESS; + return (OSKextLoadTag)KMOD_INFO_NAME.id; }