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