1 /*
   2  * Copyright (c) 2016, 2017, 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 package jdk.tools.jaotc.binformat.elf;
  25 
  26 import java.nio.ByteOrder;
  27 import jdk.tools.jaotc.binformat.elf.Elf;
  28 import jdk.tools.jaotc.binformat.elf.Elf.Elf64_Ehdr;
  29 
  30 /**
  31  * Class that abstracts MACH-O target details.
  32  *
  33  */
  34 public class ElfTargetInfo {
  35     /**
  36      * Target architecture.
  37      */
  38     private static final char arch;
  39 
  40     /**
  41      * Architecture endian-ness.
  42      */
  43     private static final int endian = Elf64_Ehdr.ELFDATA2LSB;
  44 
  45     /**
  46      * Target OS string.
  47      */
  48     private static String osName;
  49 
  50     static {
  51         // Find the target arch details
  52         String archStr = System.getProperty("os.arch").toLowerCase();
  53         if (ByteOrder.nativeOrder() != ByteOrder.LITTLE_ENDIAN) {
  54             System.out.println("Only Little Endian byte order supported!");
  55         }
  56 
  57         if (archStr.equals("amd64") || archStr.equals("x86_64")) {
  58             arch = Elf64_Ehdr.EM_X86_64;
  59         } else {
  60             System.out.println("Unsupported architecture " + archStr);
  61             arch = Elf64_Ehdr.EM_NONE;
  62         }
  63 
  64         osName = System.getProperty("os.name").toLowerCase();
  65         if (!osName.equals("linux") && !osName.equals("sunos")) {
  66             System.out.println("Unsupported Operating System " + osName);
  67             osName = "Unknown";
  68         }
  69     }
  70 
  71     public static char getElfArch() {
  72         return arch;
  73     }
  74 
  75     public static int getElfEndian() {
  76         return endian;
  77     }
  78 
  79     public static String getOsName() {
  80         return osName;
  81     }
  82 }
  83