| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.tools.jaotc.binformat.pecoff; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.util.ArrayList; |
| |
| import jdk.tools.jaotc.binformat.pecoff.PECoff.IMAGE_SYMBOL; |
| import jdk.tools.jaotc.binformat.pecoff.PECoffSymbol; |
| import jdk.tools.jaotc.binformat.pecoff.PECoffByteBuffer; |
| |
| final class PECoffSymtab { |
| ArrayList<PECoffSymbol> symbols = new ArrayList<>(); |
| |
| /** |
| * number of symbols added |
| */ |
| private int symbolCount; |
| |
| /** |
| * String holding symbol table strings |
| */ |
| private final StringBuilder strTabContent; |
| |
| /** |
| * Keeps track of bytes in string table since strTabContent.length() is number of chars, not |
| * bytes. |
| */ |
| private int strTabNrOfBytes; |
| |
| /** |
| * String holding Linker Directives |
| */ |
| private final StringBuilder directives; |
| |
| PECoffSymtab() { |
| symbolCount = 0; |
| strTabContent = new StringBuilder(); |
| directives = new StringBuilder(); |
| |
| // The first 4 bytes of the string table contain |
| // the length of the table (including this length field). |
| strTabNrOfBytes = 4; |
| |
| // Make room for the 4 byte length field |
| strTabContent.append('\0').append('\0').append('\0').append('\0'); |
| |
| // Linker Directives start with 3 spaces to signify ANSI |
| directives.append(" "); |
| } |
| |
| PECoffSymbol addSymbolEntry(String name, byte type, byte storageclass, byte secHdrIndex, long offset) { |
| // Get the current symbol index and append symbol name to string table. |
| int index; |
| PECoffSymbol sym; |
| |
| if (name.isEmpty()) { |
| index = 0; |
| strTabContent.append('\0'); |
| strTabNrOfBytes += 1; |
| sym = new PECoffSymbol(symbolCount, index, type, storageclass, secHdrIndex, offset); |
| symbols.add(sym); |
| } else { |
| int nameSize = name.getBytes().length; |
| |
| // We can't trust strTabContent.length() since that is |
| // chars (UTF16), keep track of bytes on our own. |
| index = strTabNrOfBytes; |
| // strTabContent.append('_').append(name).append('\0'); |
| strTabContent.append(name).append('\0'); |
| strTabNrOfBytes += (nameSize + 1); |
| |
| sym = new PECoffSymbol(symbolCount, index, type, storageclass, secHdrIndex, offset); |
| symbols.add(sym); |
| if (storageclass == IMAGE_SYMBOL.IMAGE_SYM_CLASS_EXTERNAL) { |
| addDirective(name, type); |
| } |
| } |
| symbolCount++; |
| return (sym); |
| } |
| |
| private void addDirective(String name, byte type) { |
| directives.append("/EXPORT:" + name); |
| if (type != IMAGE_SYMBOL.IMAGE_SYM_DTYPE_FUNCTION) { |
| directives.append(",DATA"); |
| } |
| directives.append(" "); |
| } |
| |
| int getSymtabCount() { |
| return symbolCount; |
| } |
| |
| int getStrtabSize() { |
| return strTabNrOfBytes; |
| } |
| |
| // Return a byte array that contains the symbol table entries |
| byte[] getSymtabArray() { |
| ByteBuffer symtabData = PECoffByteBuffer.allocate(symbolCount * IMAGE_SYMBOL.totalsize); |
| symtabData.order(ByteOrder.LITTLE_ENDIAN); |
| |
| // copy all symbols |
| for (int i = 0; i < symbolCount; i++) { |
| PECoffSymbol sym = symbols.get(i); |
| byte[] arr = sym.getArray(); |
| symtabData.put(arr); |
| } |
| return (symtabData.array()); |
| } |
| |
| // Return the string table array |
| byte[] getStrtabArray() { |
| byte[] strs = strTabContent.toString().getBytes(); |
| |
| // Update the size of the string table |
| ByteBuffer buff = ByteBuffer.wrap(strs); |
| buff.order(ByteOrder.LITTLE_ENDIAN); |
| buff.putInt(0, strTabNrOfBytes); |
| |
| return (strs); |
| } |
| |
| byte[] getDirectiveArray() { |
| return (directives.toString().getBytes()); |
| } |
| } |