1 /* 2 * Copyright (c) 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.macho; 25 26 import java.nio.ByteBuffer; 27 import java.nio.ByteOrder; 28 29 import jdk.tools.jaotc.binformat.macho.MachO; 30 import jdk.tools.jaotc.binformat.macho.MachO.section_64; 31 import jdk.tools.jaotc.binformat.macho.MachOByteBuffer; 32 33 public class MachOSection { 34 ByteBuffer section; 35 byte [] data; 36 boolean hasrelocations; 37 38 public MachOSection(String sectName, String segName, byte [] sectData, int sectFlags, boolean hasRelocations) { 39 section = MachOByteBuffer.allocate(section_64.totalsize); 40 41 // TODO: Hotspot uses long section names. 42 // They are getting truncated. 43 // Is this a problem?? 44 byte[] sectNameBytes = sectName.getBytes(); 45 int sectNameMax = section_64.sectname.sz < sectNameBytes.length ? 46 section_64.sectname.sz : sectNameBytes.length; 47 48 for (int i = 0; i < sectNameMax; i++) 49 section.put(section_64.sectname.off+i, sectNameBytes[i]); 50 51 byte[] segNameBytes = segName.getBytes(); 52 int segNameMax = section_64.segname.sz < segNameBytes.length ? 53 section_64.segname.sz : segNameBytes.length; 54 55 for (int i = 0; i < segNameMax; i++) 56 section.put(section_64.segname.off+i, segNameBytes[i]); 57 58 section.putLong(section_64.size.off, sectData.length); 59 60 // For now use 8 byte alignment 61 section.putInt(section_64.align.off, 3); 62 63 section.putInt(section_64.flags.off, sectFlags); 64 65 data = sectData; 66 67 hasrelocations = hasRelocations; 68 } 69 70 public long getSize() { 71 return section.getLong(section_64.size.off); 72 } 73 74 public int getAlign() { 75 return (1 << section.getInt(section_64.align.off)); 76 } 77 78 public byte[] getArray() { 79 return section.array(); 80 } 81 82 public byte[] getDataArray() { 83 return data; 84 } 85 86 public void setAddr(long addr) { 87 section.putLong(section_64.addr.off, addr); 88 } 89 90 public long getAddr() { 91 return (section.getLong(section_64.addr.off)); 92 } 93 94 public void setOffset(int offset) { 95 section.putInt(section_64.offset.off, offset); 96 } 97 98 public int getOffset() { 99 return (section.getInt(section_64.offset.off)); 100 } 101 102 public void setReloff(int offset) { 103 section.putInt(section_64.reloff.off, offset); 104 } 105 106 public void setRelcount(int count) { 107 section.putInt(section_64.nreloc.off, count); 108 } 109 110 public boolean hasRelocations() { 111 return hasrelocations; 112 } 113 } 114 115