X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/6601e61aa18bf4f09af135ff61fc7f4771d23b06..HEAD:/libkern/kmod/cplus_stop.c?ds=inline diff --git a/libkern/kmod/cplus_stop.c b/libkern/kmod/cplus_stop.c index 8151fb43f..9f23e486c 100644 --- a/libkern/kmod/cplus_stop.c +++ b/libkern/kmod/cplus_stop.c @@ -1,58 +1,44 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. - * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Copyright (c) 2000,2008-2012 Apple Inc. All rights reserved. + * + * @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. 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, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * 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_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 - -asm(".destructors_used = 0"); -asm(".private_extern .destructors_used"); - -// Functions defined in libkern/c++/OSRuntime.cpp -extern kern_return_t OSRuntimeFinalizeCPP(kmod_info_t *ki, void *data); - -// This global symbols will be defined by CreateInfo script's info.c file. -extern kmod_stop_func_t *_antimain; - -__private_extern__ kern_return_t _stop(kmod_info_t *ki, void *data) -{ - kern_return_t res = OSRuntimeFinalizeCPP(ki, data); - - if (!res && _antimain) - res = (*_antimain)(ki, data); - - return res; -}