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.pecoff; 27 28 import java.nio.ByteBuffer; 29 30 import jdk.tools.jaotc.binformat.pecoff.PECoff.IMAGE_FILE_HEADER; 31 32 final class PECoffHeader { 33 private final ByteBuffer header; 34 35 PECoffHeader() { 36 header = PECoffByteBuffer.allocate(IMAGE_FILE_HEADER.totalsize); 37 38 header.putChar(IMAGE_FILE_HEADER.Machine.off, IMAGE_FILE_HEADER.IMAGE_FILE_MACHINE_AMD64); 39 header.putInt(IMAGE_FILE_HEADER.TimeDateStamp.off, (int) (System.currentTimeMillis() / 1000)); 40 header.putInt(IMAGE_FILE_HEADER.PointerToSymbolTable.off, 0); 41 header.putInt(IMAGE_FILE_HEADER.NumberOfSymbols.off, 0); 42 header.putChar(IMAGE_FILE_HEADER.SizeOfOptionalHeader.off, (char) 0); 43 header.putChar(IMAGE_FILE_HEADER.Characteristics.off, (char) 0); 44 45 } 46 47 // Update header with the number of total sections 48 void setSectionCount(int count) { 49 header.putChar(IMAGE_FILE_HEADER.NumberOfSections.off, (char) count); 50 } 51 52 // Update header with the number of total symbols 53 void setSymbolCount(int count) { 54 header.putInt(IMAGE_FILE_HEADER.NumberOfSymbols.off, count); 55 } 56 57 // Update header with the offset of symbol table 58 void setSymbolOff(int offset) { 59 header.putInt(IMAGE_FILE_HEADER.PointerToSymbolTable.off, offset); 60 } 61 62 byte[] getArray() { 63 return header.array(); 64 } 65 }