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 24package jdk.tools.jaotc.binformat.macho; 25 26import java.util.ArrayList; 27import java.nio.ByteBuffer; 28 29import jdk.tools.jaotc.binformat.macho.MachORelocEntry; 30import jdk.tools.jaotc.binformat.macho.MachO.reloc_info; 31import jdk.tools.jaotc.binformat.macho.MachOByteBuffer; 32 33final class MachORelocTable { 34 private final ArrayList<ArrayList<MachORelocEntry>> relocEntries; 35 int fileOffset; 36 37 MachORelocTable(int numsects) { 38 relocEntries = new ArrayList<>(numsects); 39 for (int i = 0; i < numsects; i++) { 40 relocEntries.add(new ArrayList<MachORelocEntry>()); 41 } 42 } 43 44 void createRelocationEntry(int sectindex, int offset, int symno, int pcrel, int length, int isextern, int type) { 45 MachORelocEntry entry = new MachORelocEntry(offset, symno, pcrel, length, isextern, type); 46 relocEntries.get(sectindex).add(entry); 47 } 48 49 static int getAlign() { 50 return (4); 51 } 52 53 int getNumRelocs(int section_index) { 54 return relocEntries.get(section_index).size(); 55 } 56 57 // Return the relocation entries for a single section 58 // or null if no entries added to section 59 byte[] getRelocData(int section_index) { 60 ArrayList<MachORelocEntry> entryList = relocEntries.get(section_index); 61 62 if (entryList.size() == 0) { 63 return null; 64 } 65 ByteBuffer relocData = MachOByteBuffer.allocate(entryList.size() * reloc_info.totalsize); 66 67 // Copy each entry to a single ByteBuffer 68 for (int i = 0; i < entryList.size(); i++) { 69 MachORelocEntry entry = entryList.get(i); 70 relocData.put(entry.getArray()); 71 } 72 73 return (relocData.array()); 74 } 75} 76