/* * Copyright (c) 2000-2013 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, 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@ */ /* * Copyright (C) 1990, NeXT, Inc. * * File: next/kern_machdep.c * Author: John Seamons * * Machine-specific kernel routines. */ #include <sys/types.h> #include <mach/machine.h> #include <kern/cpu_number.h> #include <machine/exec.h> #include <machine/machine_routines.h> #if __x86_64__ extern int bootarg_no32exec; /* bsd_init.c */ #endif /********************************************************************** * Routine: grade_binary() * * Function: Say OK to CPU types that we can actually execute on the given * system. 64-bit binaries have the highest preference, followed * by 32-bit binaries. 0 means unsupported. **********************************************************************/ int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype, bool allow_simulator_binary __unused) { cpu_subtype_t hostsubtype = cpu_subtype(); switch (exectype) { case CPU_TYPE_X86_64: /* native 64-bit */ switch (hostsubtype) { case CPU_SUBTYPE_X86_64_H: /* x86_64h can execute anything */ switch (execsubtype) { case CPU_SUBTYPE_X86_64_H: return 3; case CPU_SUBTYPE_X86_64_ALL: return 2; } break; case CPU_SUBTYPE_X86_ARCH1: /* generic systems can only execute ALL subtype */ switch (execsubtype) { case CPU_SUBTYPE_X86_64_ALL: return 2; } break; } break; case CPU_TYPE_X86: /* native */ #if __x86_64__ if (bootarg_no32exec && !allow_simulator_binary) { return 0; } #endif return 1; } return 0; } boolean_t pie_required(cpu_type_t exectype __unused, cpu_subtype_t execsubtype __unused) { return FALSE; }