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 import java.nio.ByteOrder; 29 30 import jdk.tools.jaotc.binformat.elf.ElfRelocEntry; 31 import jdk.tools.jaotc.binformat.elf.ElfTargetInfo; 32 import jdk.tools.jaotc.binformat.elf.Elf.Elf64_Rela; 33 import jdk.tools.jaotc.binformat.elf.Elf.Elf64_Ehdr; 34 import jdk.tools.jaotc.binformat.elf.ElfByteBuffer; 35 36 public class ElfRelocTable { 37 ArrayList<ArrayList<ElfRelocEntry>> relocEntries; 38 39 public ElfRelocTable(int numsects) { 40 relocEntries = new ArrayList<ArrayList<ElfRelocEntry>>(numsects); 41 for (int i = 0; i < numsects; i++) 42 relocEntries.add(new ArrayList<ElfRelocEntry>()); 43 } 44 45 public void createRelocationEntry(int sectindex, 46 int offset, 47 int symno, 48 int type, 49 int addend) { 50 51 ElfRelocEntry entry = new ElfRelocEntry(offset, 52 symno, 53 type, 54 addend); 55 relocEntries.get(sectindex).add(entry); 56 } 57 58 public int getNumRelocs(int section_index) { 59 return relocEntries.get(section_index).size(); 60 } 61 62 // Return the relocation entries for a single section 63 // or null if no entries added to section 64 public byte [] getRelocData(int section_index) { 65 ArrayList<ElfRelocEntry> entryList = relocEntries.get(section_index); 66 67 if (entryList.size() == 0) 68 return null; 69 70 ByteBuffer relocData = ElfByteBuffer.allocate(entryList.size() * Elf64_Rela.totalsize); 71 72 // Copy each entry to a single ByteBuffer 73 for (int i = 0; i < entryList.size(); i++) { 74 ElfRelocEntry entry = entryList.get(i); 75 relocData.put(entry.getArray()); 76 } 77 78 return (relocData.array()); 79 } 80 } 81