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
   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 
  25 
  26 package jdk.tools.jaotc.binformat.macho;
  27 
  28 import java.nio.ByteBuffer;
  29 
  30 import jdk.tools.jaotc.binformat.macho.MachO.mach_header_64;
  31 
  32 final class MachOHeader {
  33     private final ByteBuffer header;
  34 
  35     MachOHeader() {
  36         header = MachOByteBuffer.allocate(mach_header_64.totalsize);
  37 
  38         header.putInt(mach_header_64.magic.off, mach_header_64.MH_MAGIC_64);
  39         header.putInt(mach_header_64.cputype.off, MachOTargetInfo.getMachOArch());
  40         header.putInt(mach_header_64.cpusubtype.off, MachOTargetInfo.getMachOSubArch());
  41         header.putInt(mach_header_64.flags.off, 0x2000);
  42         header.putInt(mach_header_64.filetype.off, mach_header_64.MH_OBJECT);
  43     }
  44 
  45     void setCmdSizes(int ncmds, int sizeofcmds) {
  46         header.putInt(mach_header_64.ncmds.off, ncmds);
  47         header.putInt(mach_header_64.sizeofcmds.off, sizeofcmds);
  48     }
  49 
  50     int getCmdSize() {
  51         return (header.getInt(mach_header_64.sizeofcmds.off));
  52     }
  53 
  54     byte[] getArray() {
  55         return header.array();
  56     }
  57 }