Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/dis/Disassembler.java @ 3735:61369a06f03c
Updated authors file.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 20:36:28 +0100 |
parents | e233f5660da4 |
children | bc8527f3071c |
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<String, Constructor>(); |
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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 /** |
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140 * Turn on the following flag in order to get debugging output. |
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141 */ |
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142 public static final boolean TRACE = false; |
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143 |
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144 private final ImmediateArgument startAddress; |
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145 private final Endianness endianness; |
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146 |
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147 protected Disassembler(ImmediateArgument startAddress, Endianness endianness, InlineDataDecoder inlineDataDecoder) { |
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148 this.startAddress = startAddress; |
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149 this.endianness = endianness; |
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150 this.inlineDataDecoder = inlineDataDecoder; |
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151 } |
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152 |
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153 public WordWidth addressWidth() { |
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154 return startAddress.width(); |
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155 } |
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156 |
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157 public Endianness endianness() { |
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158 return endianness; |
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159 } |
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160 |
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161 protected int currentPosition; |
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162 |
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163 public void setCurrentPosition(int position) { |
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164 currentPosition = position; |
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165 } |
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166 |
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167 private final AddressMapper addressMapper = new AddressMapper(); |
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168 |
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169 public AddressMapper addressMapper() { |
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170 return addressMapper; |
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171 } |
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172 |
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173 private final InlineDataDecoder inlineDataDecoder; |
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174 |
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175 public InlineDataDecoder inlineDataDecoder() { |
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176 return inlineDataDecoder; |
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177 } |
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178 |
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179 /** |
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180 * Creates one or more disassembled data objects representing some given inline data. |
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181 * |
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182 * @param inlineData some inline data decoded by this disassembler's {@linkplain #inlineDataDecoder() inline data decoder} |
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183 * @return a sequence of disassembled data objects representing {@code inlineData} |
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184 */ |
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185 protected List<DisassembledData> createDisassembledDataObjects(final InlineData inlineData) { |
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186 final InlineDataDescriptor descriptor = inlineData.descriptor(); |
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187 final int startPosition = descriptor.startPosition(); |
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188 switch (descriptor.tag()) { |
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189 case BYTE_DATA: { |
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190 final int size = inlineData.size(); |
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191 final String mnemonic = size == 1 ? ".byte" : ".bytes" + size; |
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192 final ImmediateArgument address = startAddress().plus(startPosition); |
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193 final DisassembledData disassembledData = new DisassembledData(address, startPosition, mnemonic, inlineData.data(), null) { |
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194 @Override |
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195 public String operandsToString(AddressMapper addrMapper) { |
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196 final byte[] data = inlineData.data(); |
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197 return Bytes.toHexString(data, " "); |
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198 } |
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|
199 @Override |
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200 public String toString() { |
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|
201 return toString(addressMapper()); |
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|
202 } |
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|
203 }; |
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204 return Collections.singletonList(disassembledData); |
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205 } |
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|
206 case ASCII: { |
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|
207 final String mnemonic = ".ascii"; |
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208 final ImmediateArgument address = startAddress().plus(startPosition); |
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209 final DisassembledData disassembledData = new DisassembledData(address, startPosition, mnemonic, inlineData.data(), null) { |
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|
210 @Override |
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|
211 public String operandsToString(AddressMapper addrMapper) { |
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212 final byte[] asciiBytes = inlineData.data(); |
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213 return '"' + new String(asciiBytes) + '"'; |
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|
214 } |
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|
215 @Override |
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216 public String toString() { |
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|
217 return toString(addressMapper()); |
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|
218 } |
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|
219 }; |
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220 return Collections.singletonList(disassembledData); |
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|
221 } |
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|
222 case JUMP_TABLE32: { |
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|
223 final JumpTable32 jumpTable32 = (JumpTable32) descriptor; |
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224 final List<DisassembledData> result = new ArrayList<DisassembledData>(jumpTable32.numberOfEntries()); |
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|
225 |
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226 int caseValue = jumpTable32.low(); |
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227 final InputStream stream = new ByteArrayInputStream(inlineData.data()); |
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228 final int jumpTable = startPosition; |
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|
229 int casePosition = jumpTable; |
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|
230 for (int i = 0; i < jumpTable32.numberOfEntries(); i++) { |
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|
231 try { |
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|
232 final int caseOffset = endianness().readInt(stream); |
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|
233 final byte[] caseOffsetBytes = endianness().toBytes(caseOffset); |
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|
234 |
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|
235 final int targetPosition = jumpTable + caseOffset; |
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|
236 final ImmediateArgument targetAddress = startAddress().plus(targetPosition); |
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|
237 final String caseValueOperand = String.valueOf(caseValue); |
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|
238 |
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|
239 final ImmediateArgument caseAddress = startAddress().plus(casePosition); |
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|
240 final DisassembledData disassembledData = new DisassembledData(caseAddress, casePosition, ".case", caseOffsetBytes, targetAddress) { |
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|
241 @Override |
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|
242 public String operandsToString(AddressMapper addrMapper) { |
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|
243 final DisassembledLabel label = addrMapper.labelAt(targetAddress); |
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|
244 String s = caseValueOperand + ", "; |
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245 if (label != null) { |
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246 s += label.name() + ": "; |
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247 } |
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248 if (caseOffset >= 0) { |
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249 s += "+"; |
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250 } |
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251 return s + caseOffset; |
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252 } |
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253 @Override |
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254 public String toString() { |
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255 return toString(addressMapper()); |
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256 } |
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257 }; |
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258 result.add(disassembledData); |
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259 casePosition += 4; |
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260 caseValue++; |
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261 } catch (IOException ioException) { |
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262 throw ProgramError.unexpected(ioException); |
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263 } |
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264 } |
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265 assert casePosition == descriptor.endPosition(); |
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266 return result; |
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267 } |
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268 case LOOKUP_TABLE32: { |
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269 final LookupTable32 lookupTable32 = (LookupTable32) descriptor; |
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270 final List<DisassembledData> result = new ArrayList<DisassembledData>(lookupTable32.numberOfEntries()); |
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271 |
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272 final InputStream stream = new ByteArrayInputStream(inlineData.data()); |
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273 final int lookupTable = startPosition; |
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274 int casePosition = lookupTable; |
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275 for (int i = 0; i < lookupTable32.numberOfEntries(); i++) { |
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276 try { |
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277 final int caseValue = endianness().readInt(stream); |
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278 final int caseOffset = endianness().readInt(stream); |
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279 |
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280 final byte[] caseBytes = new byte[8]; |
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281 endianness().toBytes(caseValue, caseBytes, 0); |
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282 endianness().toBytes(caseOffset, caseBytes, 4); |
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283 |
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284 final int targetPosition = lookupTable + caseOffset; |
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285 final ImmediateArgument caseAddress = startAddress().plus(casePosition); |
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286 final ImmediateArgument targetAddress = startAddress().plus(targetPosition); |
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287 |
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288 final DisassembledData disassembledData = new DisassembledData(caseAddress, casePosition, ".case", caseBytes, targetAddress) { |
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289 @Override |
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290 public String operandsToString(AddressMapper addrMapper) { |
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291 final DisassembledLabel label = addrMapper.labelAt(targetAddress); |
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292 String s = caseValue + ", "; |
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293 if (label != null) { |
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294 s += label.name() + ": "; |
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295 } |
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296 if (caseOffset >= 0) { |
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297 s += "+"; |
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298 } |
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299 return s + caseOffset; |
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300 } |
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301 @Override |
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302 public String toString() { |
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303 return toString(addressMapper()); |
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304 } |
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305 }; |
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306 result.add(disassembledData); |
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307 casePosition += 8; |
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308 } catch (IOException ioException) { |
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309 throw ProgramError.unexpected(ioException); |
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310 } |
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311 } |
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312 assert casePosition == descriptor.endPosition(); |
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313 return result; |
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314 } |
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315 } |
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316 throw ProgramError.unknownCase(descriptor.tag().toString()); |
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317 } |
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318 |
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|
319 /** |
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320 * Creates an assembler that will start assembling at {@code this.startAddress() + position}. |
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321 */ |
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322 protected abstract Assembler createAssembler(int position); |
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323 |
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324 /** |
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325 * Scans an instruction stream and disassembles the first encoded instruction. |
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326 * <p> |
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327 * @return the disassembled forms that match the first encoded instruction in {@code stream} |
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328 */ |
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329 public final List<DisassembledObject> scanOne(BufferedInputStream stream) throws IOException, AssemblyException { |
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330 final List<DisassembledObject> disassembledObjects = scanOne0(stream); |
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331 if (!disassembledObjects.isEmpty()) { |
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332 addressMapper.add(Utils.first(disassembledObjects)); |
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|
333 } |
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334 return disassembledObjects; |
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|
335 } |
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|
336 |
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|
337 /** |
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|
338 * Does the actual scanning for {@link #scanOne(BufferedInputStream)}. |
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|
339 */ |
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|
340 protected abstract List<DisassembledObject> scanOne0(BufferedInputStream stream) throws IOException, AssemblyException; |
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341 |
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|
342 /** |
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|
343 * Scans an instruction stream and disassembles the encoded objects. If an encoded instruction has |
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344 * more than one matching disassembled form, an arbitrary choice of one of the disassembled forms is |
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345 * appended to the returned sequence. |
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|
346 * <p> |
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|
347 * The {@link #scanOne} method can be used to obtain all the disassembled forms |
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348 * for each instruction in an instruction stream. |
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349 */ |
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|
350 public final List<DisassembledObject> scan(BufferedInputStream stream) throws IOException, AssemblyException { |
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|
351 final List<DisassembledObject> disassembledObjects = scan0(stream); |
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352 addressMapper.add(disassembledObjects); |
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|
353 return disassembledObjects; |
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|
354 |
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|
355 } |
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|
356 |
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|
357 /** |
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|
358 * Does the actual scanning for {@link #scan(BufferedInputStream)}. |
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|
359 */ |
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|
360 protected abstract List<DisassembledObject> scan0(BufferedInputStream stream) throws IOException, AssemblyException; |
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|
361 |
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|
362 protected final void scanInlineData(BufferedInputStream stream, List<DisassembledObject> disassembledObjects) throws IOException { |
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|
363 if (inlineDataDecoder() != null) { |
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|
364 InlineData inlineData; |
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|
365 while ((inlineData = inlineDataDecoder().decode(currentPosition, stream)) != null) { |
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|
366 currentPosition += addDisassembledDataObjects(disassembledObjects, inlineData); |
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|
367 } |
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|
368 } |
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|
369 } |
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|
370 |
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|
371 protected int addDisassembledDataObjects(List<DisassembledObject> disassembledObjects, InlineData inlineData) { |
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372 final List<DisassembledData> dataObjects = createDisassembledDataObjects(inlineData); |
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373 for (DisassembledData dataObject : dataObjects) { |
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374 disassembledObjects.add(dataObject); |
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375 } |
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376 return inlineData.size(); |
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377 } |
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378 |
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379 /** |
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380 * The start address of the instruction stream decoded by this disassembler. |
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381 */ |
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382 protected final ImmediateArgument startAddress() { |
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383 return startAddress; |
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384 } |
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385 |
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386 public void scanAndPrint(BufferedInputStream bufferedInputStream, OutputStream outputStream) throws IOException, AssemblyException { |
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387 scanAndPrint(bufferedInputStream, outputStream, new DisassemblyPrinter(false)); |
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388 } |
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389 |
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390 public void scanAndPrint(BufferedInputStream bufferedInputStream, OutputStream outputStream, DisassemblyPrinter printer) throws IOException, AssemblyException { |
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391 if (printer == null) { |
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392 scanAndPrint(bufferedInputStream, outputStream); |
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393 } else { |
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394 final List<DisassembledObject> disassembledObjects = scan(bufferedInputStream); |
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395 printer.print(this, outputStream, disassembledObjects); |
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396 } |
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397 } |
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398 |
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399 public enum AbstractionPreference { |
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400 RAW, SYNTHETIC; |
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401 } |
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402 |
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403 private AbstractionPreference abstractionPreference = AbstractionPreference.SYNTHETIC; |
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404 |
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405 protected AbstractionPreference abstractionPreference() { |
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406 return abstractionPreference; |
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407 } |
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408 |
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409 public void setAbstractionPreference(AbstractionPreference abstractionPreference) { |
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410 this.abstractionPreference = abstractionPreference; |
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411 } |
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412 |
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413 private int expectedNumberOfArguments = -1; |
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414 |
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415 protected int expectedNumberOfArguments() { |
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416 return expectedNumberOfArguments; |
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417 } |
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418 |
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419 public void setExpectedNumberOfArguments(int expectedNumberOfArguments) { |
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420 this.expectedNumberOfArguments = expectedNumberOfArguments; |
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421 } |
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422 |
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423 public abstract ImmediateArgument addressForRelativeAddressing(DisassembledInstruction di); |
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424 public abstract String mnemonic(DisassembledInstruction di); |
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425 public abstract String operandsToString(DisassembledInstruction di, AddressMapper addressMapper); |
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426 public abstract String toString(DisassembledInstruction di, AddressMapper addressMapper); |
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427 } |