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.util.ArrayList; 27 import java.nio.ByteBuffer; 28 29 import jdk.tools.jaotc.binformat.elf.ElfRelocEntry; 30 import jdk.tools.jaotc.binformat.elf.Elf.Elf64_Rela; 31 import jdk.tools.jaotc.binformat.elf.ElfByteBuffer; 32 33 final class ElfRelocTable { 34 private final ArrayList<ArrayList<ElfRelocEntry>> relocEntries; 35 36 ElfRelocTable(int numsects) { 37 relocEntries = new ArrayList<>(numsects); 38 for (int i = 0; i < numsects; i++) { 39 relocEntries.add(new ArrayList<ElfRelocEntry>()); 40 } 41 } 42 43 void createRelocationEntry(int sectindex, int offset, int symno, int type, int addend) { 44 ElfRelocEntry entry = new ElfRelocEntry(offset, symno, type, addend); 45 relocEntries.get(sectindex).add(entry); 46 } 47 48 int getNumRelocs(int section_index) { 49 return relocEntries.get(section_index).size(); 50 } 51 52 // Return the relocation entries for a single section 53 // or null if no entries added to section 54 byte[] getRelocData(int section_index) { 55 ArrayList<ElfRelocEntry> entryList = relocEntries.get(section_index); 56 57 if (entryList.size() == 0) { 58 return null; 59 } 60 ByteBuffer relocData = ElfByteBuffer.allocate(entryList.size() * Elf64_Rela.totalsize); 61 62 // Copy each entry to a single ByteBuffer 63 for (int i = 0; i < entryList.size(); i++) { 64 ElfRelocEntry entry = entryList.get(i); 65 relocData.put(entry.getArray()); 66 } 67 68 return (relocData.array()); 69 } 70 }