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