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