1/*
2 * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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23 * Please see the License for the specific language governing rights and
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25 *
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27 */
28/*
29 * Copyright (C) 1990, NeXT, Inc.
30 *
31 * File: next/kern_machdep.c
32 * Author: John Seamons
33 *
34 * Machine-specific kernel routines.
35 */
36
37#include <sys/types.h>
38#include <mach/machine.h>
39#include <kern/cpu_number.h>
40#include <machine/exec.h>
41#include <machine/machine_routines.h>
42
43/**********************************************************************
44 * Routine: grade_binary()
45 *
46 * Function: Say OK to CPU types that we can actually execute on the given
47 * system. 64-bit binaries have the highest preference, followed
48 * by 32-bit binaries. 0 means unsupported.
49 **********************************************************************/
50int
51grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype)
52{
53 cpu_subtype_t hostsubtype = cpu_subtype();
54
55 switch(exectype) {
56 case CPU_TYPE_X86_64: /* native 64-bit */
57 switch(hostsubtype) {
58 case CPU_SUBTYPE_X86_64_H: /* x86_64h can execute anything */
59 switch (execsubtype) {
60 case CPU_SUBTYPE_X86_64_H:
61 return 3;
62 case CPU_SUBTYPE_X86_64_ALL:
63 return 2;
64 }
65 break;
66 case CPU_SUBTYPE_X86_ARCH1: /* generic systems can only execute ALL subtype */
67 switch (execsubtype) {
68 case CPU_SUBTYPE_X86_64_ALL:
69 return 2;
70 }
71 break;
72 }
73 break;
74 case CPU_TYPE_X86: /* native */
75 return 1;
76 }
77
78 return 0;
79}
80
81boolean_t
82pie_required(cpu_type_t exectype __unused, cpu_subtype_t execsubtype __unused)
83{
84 return FALSE;
85}
86