1 /*
2  * Copyright (c) 2017, 2018, 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
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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
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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.reloc_info;
31 
32 final class MachORelocEntry {
33     private final ByteBuffer entry;
34 
MachORelocEntry(int offset, int symno, int pcrel, int length, int isextern, int type)35     MachORelocEntry(int offset, int symno, int pcrel, int length, int isextern, int type) {
36 
37         entry = MachOByteBuffer.allocate(reloc_info.totalsize);
38 
39         entry.putInt(reloc_info.r_address.off, offset);
40 
41         // Encode and store the relocation entry bitfields
42         // @formatter:off
43         entry.putInt(reloc_info.r_relocinfo.off,
44             ((symno    & reloc_info.REL_SYMNUM_MASK) << reloc_info.REL_SYMNUM_SHIFT) |
45             ((pcrel    & reloc_info.REL_PCREL_MASK)  << reloc_info.REL_PCREL_SHIFT)  |
46             ((length   & reloc_info.REL_LENGTH_MASK) << reloc_info.REL_LENGTH_SHIFT) |
47             ((isextern & reloc_info.REL_EXTERN_MASK) << reloc_info.REL_EXTERN_SHIFT) |
48             ((type     & reloc_info.REL_TYPE_MASK)   << reloc_info.REL_TYPE_SHIFT));
49         // @formatter:on
50     }
51 
getArray()52     byte[] getArray() {
53         return entry.array();
54     }
55 }
56