1 /*
   2  * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 
  26 package jdk.tools.jaotc.binformat.macho;
  27 
  28 import java.nio.ByteOrder;
  29 import jdk.tools.jaotc.binformat.macho.MachO.mach_header_64;
  30 
  31 /**
  32  * Class that abstracts MACH-O target details.
  33  *
  34  */
  35 final class MachOTargetInfo {
  36     /**
  37      * Target architecture and subtype.
  38      */
  39     private static final int arch;
  40     private static final int subarch;
  41 
  42     /**
  43      * Architecture endian-ness.
  44      */
  45     private static final int endian = mach_header_64.CPU_SUBTYPE_LITTLE_ENDIAN;
  46 
  47     /**
  48      * Target OS string.
  49      */
  50     private static final String osName;
  51 
  52     static {
  53         // Find the target arch details
  54         String archStr = System.getProperty("os.arch").toLowerCase();
  55 
  56         if (ByteOrder.nativeOrder() != ByteOrder.LITTLE_ENDIAN) {
  57             System.out.println("Only Little Endian byte order supported!");
  58         }
  59 
  60         if (archStr.equals("amd64") || archStr.equals("x86_64")) {
  61             arch = mach_header_64.CPU_TYPE_X86_64;
  62             subarch = mach_header_64.CPU_SUBTYPE_I386_ALL;
  63         } else {
  64             System.out.println("Unsupported architecture " + archStr);
  65             arch = mach_header_64.CPU_TYPE_ANY;
  66             subarch = 0;
  67         }
  68 
  69         osName = System.getProperty("os.name").toLowerCase();
  70     }
  71 
  72     static int getMachOArch() {
  73         return arch;
  74     }
  75 
  76     static int getMachOSubArch() {
  77         return subarch;
  78     }
  79 
  80     static int getMachOEndian() {
  81         return endian;
  82     }
  83 
  84     static String getOsName() {
  85         return osName;
  86     }
  87 }