Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/dis/Disassembler.java @ 4235:23f41c48b19b
Re-enabled Java cleaning in gate.
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 06 Jan 2012 14:22:57 +0100 |
parents | bc8527f3071c |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.max.asm.dis; |
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24 |
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25 import java.io.*; |
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26 import java.lang.reflect.*; |
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27 import java.util.*; |
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28 |
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29 import com.sun.max.*; |
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30 import com.sun.max.asm.*; |
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31 import com.sun.max.asm.InlineDataDescriptor.*; |
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32 import com.sun.max.asm.gen.*; |
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33 import com.sun.max.lang.*; |
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34 import com.sun.max.program.*; |
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35 |
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36 /** |
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37 * Disassemblers scan machine code, discern and decode individual instructions and inline data objects and represent |
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38 * them in an abstract representation, which they can then render in human-readable form, an assembly listing. |
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39 */ |
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40 public abstract class Disassembler { |
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41 |
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42 private static final Map<String, Constructor> disassemblerConstructors = new HashMap<>(); |
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43 |
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44 /** |
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45 * Gets a constructor for instantiating a disassembler for a given {@linkplain ISA ISA} |
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46 * and {@linkplain WordWidth word size}. If a non-null constructor is returned, it's signature |
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47 * will be {@code (long, InlineDataDecoder)} or {@code (int, InlineDataDecoder)} depending on whether |
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48 * {@code wordWidth} is {@link WordWidth#BITS_64} or {@link WordWidth#BITS_32}. |
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49 * |
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50 * @param isa an instruction set |
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51 * @param wordWidth a word size |
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52 * @return a disassembler for {@code isa} and {@code wordWidth} or {@code null} if none exists |
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53 */ |
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54 public static Constructor getDisassemblerConstructor(ISA isa, WordWidth wordWidth) { |
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55 String key = isa + " " + wordWidth; |
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56 Constructor con = disassemblerConstructors.get(key); |
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57 if (con == null) { |
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58 // Try word-width specific class first: |
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59 String packageName = Classes.getPackageName(Disassembler.class) + "." + isa.name().toLowerCase(); |
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60 String className = packageName + "." + isa.name() + wordWidth.numberOfBits + "Disassembler"; |
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61 Class<?> disasmClass = null; |
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62 try { |
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63 disasmClass = Class.forName(className); |
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64 } catch (ClassNotFoundException e1) { |
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65 className = packageName + "." + isa.name() + "Disassembler"; |
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66 try { |
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67 disasmClass = Class.forName(className); |
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68 } catch (ClassNotFoundException e2) { |
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69 return null; |
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70 } |
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71 } |
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72 try { |
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73 if (wordWidth == WordWidth.BITS_64) { |
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74 con = disasmClass.getConstructor(long.class, InlineDataDecoder.class); |
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75 } else { |
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76 assert wordWidth == WordWidth.BITS_32 : wordWidth; |
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77 con = disasmClass.getConstructor(int.class, InlineDataDecoder.class); |
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78 } |
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79 } catch (NoSuchMethodException e) { |
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80 return null; |
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81 } |
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82 disassemblerConstructors.put(key, con); |
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83 } |
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84 return con; |
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85 |
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86 } |
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87 |
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88 /** |
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89 * Gets a disassembler for a given {@linkplain ISA ISA} and {@linkplain WordWidth word size} |
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90 * that can be used to disassemble an instruction stream located at a given address. |
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91 * |
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92 * @param isa an instruction set |
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93 * @param wordWidth a word size |
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94 * @param startAddress the start address at which the instruction stream to be disassembled is located |
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95 * @param inlineDataDecoder used to decode any inline data in {@code code}. This value can be {@code null}. |
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96 * @return the created disassembler |
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97 * @throws IllegalArgumentException if no disassembler exists for {@code isa} and {@code wordWidth} |
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98 */ |
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99 public static Disassembler createDisassembler(ISA isa, WordWidth wordWidth, long startAddress, InlineDataDecoder inlineDataDecoder) { |
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100 Constructor con = getDisassemblerConstructor(isa, wordWidth); |
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101 if (con == null) { |
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102 throw new IllegalArgumentException("No disassembler is available for " + isa + " with word size " + wordWidth.numberOfBits); |
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103 } |
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104 |
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105 try { |
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106 return (Disassembler) con.newInstance(startAddress, inlineDataDecoder); |
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107 } catch (Exception e) { |
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108 throw (InternalError) new InternalError("Error invoking constructor " + con).initCause(e); |
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109 } |
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110 } |
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111 |
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112 /** |
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113 * Prints a textual disassembly of some given machine code. |
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114 * |
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115 * @param out where to print the disassembly |
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116 * @param code the machine code to be disassembled and printed |
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117 * @param isa the instruction set |
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118 * @param wordWidth the word width |
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119 * @param startAddress the address at which {@code code} is located |
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120 * @param inlineDataDecoder used to decode any inline data in {@code code} |
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121 * @param disassemblyPrinter the printer utility to use for the printing. If {@code null}, then a new instance of |
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122 * {@link DisassemblyPrinter} is created and used. |
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123 */ |
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124 public static void disassemble(OutputStream out, byte[] code, ISA isa, WordWidth wordWidth, long startAddress, InlineDataDecoder inlineDataDecoder, DisassemblyPrinter disassemblyPrinter) { |
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125 if (code.length == 0) { |
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126 return; |
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127 } |
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128 final Disassembler disassembler = createDisassembler(isa, wordWidth, startAddress, inlineDataDecoder); |
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129 final BufferedInputStream stream = new BufferedInputStream(new ByteArrayInputStream(code)); |
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130 try { |
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131 disassembler.scanAndPrint(stream, out, disassemblyPrinter); |
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132 } catch (IOException ioException) { |
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133 throw ProgramError.unexpected(); |
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134 } catch (AssemblyException assemblyException) { |
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135 System.err.println(assemblyException); |
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136 } |
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137 } |
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138 |
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139 private final ImmediateArgument startAddress; |
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140 private final Endianness endianness; |
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141 |
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142 protected Disassembler(ImmediateArgument startAddress, Endianness endianness, InlineDataDecoder inlineDataDecoder) { |
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143 this.startAddress = startAddress; |
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144 this.endianness = endianness; |
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145 this.inlineDataDecoder = inlineDataDecoder; |
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146 } |
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147 |
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148 public WordWidth addressWidth() { |
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149 return startAddress.width(); |
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150 } |
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151 |
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152 public Endianness endianness() { |
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153 return endianness; |
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154 } |
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155 |
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156 protected int currentPosition; |
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157 |
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158 public void setCurrentPosition(int position) { |
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159 currentPosition = position; |
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160 } |
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161 |
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162 private final AddressMapper addressMapper = new AddressMapper(); |
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163 |
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164 public AddressMapper addressMapper() { |
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165 return addressMapper; |
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166 } |
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167 |
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168 private final InlineDataDecoder inlineDataDecoder; |
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169 |
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170 public InlineDataDecoder inlineDataDecoder() { |
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171 return inlineDataDecoder; |
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172 } |
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173 |
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174 /** |
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175 * Creates one or more disassembled data objects representing some given inline data. |
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176 * |
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177 * @param inlineData some inline data decoded by this disassembler's {@linkplain #inlineDataDecoder() inline data decoder} |
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178 * @return a sequence of disassembled data objects representing {@code inlineData} |
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179 */ |
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180 protected List<DisassembledData> createDisassembledDataObjects(final InlineData inlineData) { |
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181 final InlineDataDescriptor descriptor = inlineData.descriptor(); |
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182 final int startPosition = descriptor.startPosition(); |
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183 switch (descriptor.tag()) { |
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184 case BYTE_DATA: { |
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185 final int size = inlineData.size(); |
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186 final String mnemonic = size == 1 ? ".byte" : ".bytes" + size; |
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187 final ImmediateArgument address = startAddress().plus(startPosition); |
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188 final DisassembledData disassembledData = new DisassembledData(address, startPosition, mnemonic, inlineData.data(), null) { |
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189 @Override |
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190 public String operandsToString(AddressMapper addrMapper) { |
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191 final byte[] data = inlineData.data(); |
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192 return Bytes.toHexString(data, " "); |
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193 } |
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194 @Override |
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195 public String toString() { |
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196 return toString(addressMapper()); |
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197 } |
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198 }; |
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199 return Collections.singletonList(disassembledData); |
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200 } |
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201 case ASCII: { |
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202 final String mnemonic = ".ascii"; |
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203 final ImmediateArgument address = startAddress().plus(startPosition); |
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204 final DisassembledData disassembledData = new DisassembledData(address, startPosition, mnemonic, inlineData.data(), null) { |
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|
205 @Override |
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206 public String operandsToString(AddressMapper addrMapper) { |
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207 final byte[] asciiBytes = inlineData.data(); |
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208 return '"' + new String(asciiBytes) + '"'; |
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209 } |
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|
210 @Override |
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211 public String toString() { |
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212 return toString(addressMapper()); |
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|
213 } |
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|
214 }; |
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215 return Collections.singletonList(disassembledData); |
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216 } |
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217 case JUMP_TABLE32: { |
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218 final JumpTable32 jumpTable32 = (JumpTable32) descriptor; |
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219 final List<DisassembledData> result = new ArrayList<>(jumpTable32.numberOfEntries()); |
3733
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220 |
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221 int caseValue = jumpTable32.low(); |
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222 final InputStream stream = new ByteArrayInputStream(inlineData.data()); |
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223 final int jumpTable = startPosition; |
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|
224 int casePosition = jumpTable; |
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|
225 for (int i = 0; i < jumpTable32.numberOfEntries(); i++) { |
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|
226 try { |
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|
227 final int caseOffset = endianness().readInt(stream); |
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228 final byte[] caseOffsetBytes = endianness().toBytes(caseOffset); |
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|
229 |
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230 final int targetPosition = jumpTable + caseOffset; |
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|
231 final ImmediateArgument targetAddress = startAddress().plus(targetPosition); |
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|
232 final String caseValueOperand = String.valueOf(caseValue); |
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|
233 |
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|
234 final ImmediateArgument caseAddress = startAddress().plus(casePosition); |
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|
235 final DisassembledData disassembledData = new DisassembledData(caseAddress, casePosition, ".case", caseOffsetBytes, targetAddress) { |
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|
236 @Override |
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|
237 public String operandsToString(AddressMapper addrMapper) { |
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|
238 final DisassembledLabel label = addrMapper.labelAt(targetAddress); |
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|
239 String s = caseValueOperand + ", "; |
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|
240 if (label != null) { |
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|
241 s += label.name() + ": "; |
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|
242 } |
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|
243 if (caseOffset >= 0) { |
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|
244 s += "+"; |
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245 } |
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246 return s + caseOffset; |
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247 } |
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248 @Override |
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249 public String toString() { |
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250 return toString(addressMapper()); |
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251 } |
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252 }; |
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253 result.add(disassembledData); |
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254 casePosition += 4; |
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255 caseValue++; |
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256 } catch (IOException ioException) { |
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257 throw ProgramError.unexpected(ioException); |
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258 } |
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259 } |
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260 assert casePosition == descriptor.endPosition(); |
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261 return result; |
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262 } |
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263 case LOOKUP_TABLE32: { |
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264 final LookupTable32 lookupTable32 = (LookupTable32) descriptor; |
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265 final List<DisassembledData> result = new ArrayList<>(lookupTable32.numberOfEntries()); |
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266 |
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267 final InputStream stream = new ByteArrayInputStream(inlineData.data()); |
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268 final int lookupTable = startPosition; |
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269 int casePosition = lookupTable; |
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270 for (int i = 0; i < lookupTable32.numberOfEntries(); i++) { |
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271 try { |
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272 final int caseValue = endianness().readInt(stream); |
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273 final int caseOffset = endianness().readInt(stream); |
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274 |
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275 final byte[] caseBytes = new byte[8]; |
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276 endianness().toBytes(caseValue, caseBytes, 0); |
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277 endianness().toBytes(caseOffset, caseBytes, 4); |
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278 |
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279 final int targetPosition = lookupTable + caseOffset; |
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280 final ImmediateArgument caseAddress = startAddress().plus(casePosition); |
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281 final ImmediateArgument targetAddress = startAddress().plus(targetPosition); |
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282 |
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283 final DisassembledData disassembledData = new DisassembledData(caseAddress, casePosition, ".case", caseBytes, targetAddress) { |
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284 @Override |
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285 public String operandsToString(AddressMapper addrMapper) { |
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286 final DisassembledLabel label = addrMapper.labelAt(targetAddress); |
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287 String s = caseValue + ", "; |
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288 if (label != null) { |
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289 s += label.name() + ": "; |
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290 } |
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291 if (caseOffset >= 0) { |
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292 s += "+"; |
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293 } |
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294 return s + caseOffset; |
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295 } |
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296 @Override |
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297 public String toString() { |
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298 return toString(addressMapper()); |
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299 } |
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300 }; |
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301 result.add(disassembledData); |
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302 casePosition += 8; |
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303 } catch (IOException ioException) { |
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304 throw ProgramError.unexpected(ioException); |
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305 } |
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306 } |
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307 assert casePosition == descriptor.endPosition(); |
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308 return result; |
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309 } |
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310 } |
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311 throw ProgramError.unknownCase(descriptor.tag().toString()); |
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312 } |
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313 |
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314 /** |
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315 * Creates an assembler that will start assembling at {@code this.startAddress() + position}. |
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316 */ |
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317 protected abstract Assembler createAssembler(int position); |
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318 |
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319 /** |
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320 * Scans an instruction stream and disassembles the first encoded instruction. |
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321 * <p> |
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322 * @return the disassembled forms that match the first encoded instruction in {@code stream} |
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323 */ |
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324 public final List<DisassembledObject> scanOne(BufferedInputStream stream) throws IOException, AssemblyException { |
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325 final List<DisassembledObject> disassembledObjects = scanOne0(stream); |
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326 if (!disassembledObjects.isEmpty()) { |
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327 addressMapper.add(Utils.first(disassembledObjects)); |
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328 } |
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329 return disassembledObjects; |
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|
330 } |
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|
331 |
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|
332 /** |
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|
333 * Does the actual scanning for {@link #scanOne(BufferedInputStream)}. |
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334 */ |
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|
335 protected abstract List<DisassembledObject> scanOne0(BufferedInputStream stream) throws IOException, AssemblyException; |
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336 |
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|
337 /** |
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338 * Scans an instruction stream and disassembles the encoded objects. If an encoded instruction has |
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339 * more than one matching disassembled form, an arbitrary choice of one of the disassembled forms is |
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340 * appended to the returned sequence. |
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341 * <p> |
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342 * The {@link #scanOne} method can be used to obtain all the disassembled forms |
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343 * for each instruction in an instruction stream. |
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344 */ |
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345 public final List<DisassembledObject> scan(BufferedInputStream stream) throws IOException, AssemblyException { |
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346 final List<DisassembledObject> disassembledObjects = scan0(stream); |
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347 addressMapper.add(disassembledObjects); |
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348 return disassembledObjects; |
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349 |
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|
350 } |
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|
351 |
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|
352 /** |
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|
353 * Does the actual scanning for {@link #scan(BufferedInputStream)}. |
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354 */ |
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|
355 protected abstract List<DisassembledObject> scan0(BufferedInputStream stream) throws IOException, AssemblyException; |
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356 |
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357 protected final void scanInlineData(BufferedInputStream stream, List<DisassembledObject> disassembledObjects) throws IOException { |
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358 if (inlineDataDecoder() != null) { |
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|
359 InlineData inlineData; |
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|
360 while ((inlineData = inlineDataDecoder().decode(currentPosition, stream)) != null) { |
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|
361 currentPosition += addDisassembledDataObjects(disassembledObjects, inlineData); |
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|
362 } |
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|
363 } |
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|
364 } |
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|
365 |
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|
366 protected int addDisassembledDataObjects(List<DisassembledObject> disassembledObjects, InlineData inlineData) { |
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367 final List<DisassembledData> dataObjects = createDisassembledDataObjects(inlineData); |
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|
368 for (DisassembledData dataObject : dataObjects) { |
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|
369 disassembledObjects.add(dataObject); |
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370 } |
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371 return inlineData.size(); |
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372 } |
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373 |
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374 /** |
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375 * The start address of the instruction stream decoded by this disassembler. |
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376 */ |
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377 protected final ImmediateArgument startAddress() { |
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378 return startAddress; |
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379 } |
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380 |
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381 public void scanAndPrint(BufferedInputStream bufferedInputStream, OutputStream outputStream) throws IOException, AssemblyException { |
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382 scanAndPrint(bufferedInputStream, outputStream, new DisassemblyPrinter(false)); |
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383 } |
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384 |
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385 public void scanAndPrint(BufferedInputStream bufferedInputStream, OutputStream outputStream, DisassemblyPrinter printer) throws IOException, AssemblyException { |
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386 if (printer == null) { |
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387 scanAndPrint(bufferedInputStream, outputStream); |
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388 } else { |
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389 final List<DisassembledObject> disassembledObjects = scan(bufferedInputStream); |
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390 printer.print(this, outputStream, disassembledObjects); |
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391 } |
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392 } |
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393 |
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394 public enum AbstractionPreference { |
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395 RAW, SYNTHETIC; |
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396 } |
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397 |
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398 private AbstractionPreference abstractionPreference = AbstractionPreference.SYNTHETIC; |
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399 |
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400 protected AbstractionPreference abstractionPreference() { |
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401 return abstractionPreference; |
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402 } |
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403 |
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404 public void setAbstractionPreference(AbstractionPreference abstractionPreference) { |
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405 this.abstractionPreference = abstractionPreference; |
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406 } |
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407 |
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408 private int expectedNumberOfArguments = -1; |
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409 |
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410 protected int expectedNumberOfArguments() { |
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411 return expectedNumberOfArguments; |
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412 } |
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413 |
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414 public void setExpectedNumberOfArguments(int expectedNumberOfArguments) { |
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415 this.expectedNumberOfArguments = expectedNumberOfArguments; |
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416 } |
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417 |
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418 public abstract ImmediateArgument addressForRelativeAddressing(DisassembledInstruction di); |
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419 public abstract String mnemonic(DisassembledInstruction di); |
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420 public abstract String operandsToString(DisassembledInstruction di, AddressMapper printAddressMapper); |
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421 public abstract String toString(DisassembledInstruction di, AddressMapper printAddressMapper); |
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422 } |