1 /* 2 * Copyright (c) 2016, 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.elf; 27 28 import java.nio.ByteOrder; 29 import jdk.tools.jaotc.binformat.elf.Elf.Elf64_Ehdr; 30 31 /** 32 * Class that abstracts MACH-O target details. 33 * 34 */ 35 final class ElfTargetInfo { 36 /** 37 * Target architecture. 38 */ 39 private static final char arch; 40 41 /** 42 * Architecture endian-ness. 43 */ 44 private static final int endian = Elf64_Ehdr.ELFDATA2LSB; 45 46 /** 47 * Target OS string. 48 */ 49 private static String osName; 50 51 static { 52 // Find the target arch details 53 String archStr = System.getProperty("os.arch").toLowerCase(); 54 if (ByteOrder.nativeOrder() != ByteOrder.LITTLE_ENDIAN) { 55 System.out.println("Only Little Endian byte order supported!"); 56 } 57 58 if (archStr.equals("amd64") || archStr.equals("x86_64")) { 59 arch = Elf64_Ehdr.EM_X86_64; 60 } else if (archStr.equals("aarch64")) { 61 arch = Elf64_Ehdr.EM_AARCH64; 62 } else { 63 System.out.println("Unsupported architecture " + archStr); 64 arch = Elf64_Ehdr.EM_NONE; 65 } 66 67 osName = System.getProperty("os.name").toLowerCase(); 68 if (!osName.equals("linux") && !osName.equals("sunos")) { 69 System.out.println("Unsupported Operating System " + osName); 70 osName = "Unknown"; 71 } 72 } 73 74 static char getElfArch() { 75 return arch; 76 } 77 78 static int getElfEndian() { 79 return endian; 80 } 81 82 static String getOsName() { 83 return osName; 84 } 85 }