89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
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/*
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* Copyright (c) 2000-2013 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (C) 1990, NeXT, Inc.
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*
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* File: next/kern_machdep.c
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* Author: John Seamons
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*
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* Machine-specific kernel routines.
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*/
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#include <sys/types.h>
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#include <mach/machine.h>
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#include <kern/cpu_number.h>
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#include <machine/exec.h>
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#include <machine/machine_routines.h>
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#if __x86_64__
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extern int bootarg_no32exec; /* bsd_init.c */
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#endif
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/**********************************************************************
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* Routine: grade_binary()
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*
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* Function: Say OK to CPU types that we can actually execute on the given
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* system. 64-bit binaries have the highest preference, followed
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* by 32-bit binaries. 0 means unsupported.
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**********************************************************************/
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int
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grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype, cpu_subtype_t execfeatures __unused, bool allow_simulator_binary __unused)
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{
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cpu_subtype_t hostsubtype = cpu_subtype();
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switch (exectype) {
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case CPU_TYPE_X86_64: /* native 64-bit */
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switch (hostsubtype) {
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case CPU_SUBTYPE_X86_64_H: /* x86_64h can execute anything */
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switch (execsubtype) {
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case CPU_SUBTYPE_X86_64_H:
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return 3;
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case CPU_SUBTYPE_X86_64_ALL:
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return 2;
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}
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break;
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case CPU_SUBTYPE_X86_ARCH1: /* generic systems can only execute ALL subtype */
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switch (execsubtype) {
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case CPU_SUBTYPE_X86_64_ALL:
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return 2;
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}
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break;
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}
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break;
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case CPU_TYPE_X86: /* native */
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#if __x86_64__
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if (bootarg_no32exec && !allow_simulator_binary) {
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return 0;
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}
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#endif
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return 1;
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}
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return 0;
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}
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