Mercurial > hg > truffle
annotate graal/com.oracle.max.asmdis/src/com/sun/max/asm/Assembler.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; |
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24 |
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25 import java.io.*; |
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26 import java.util.*; |
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27 |
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28 import com.sun.max.lang.*; |
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29 import com.sun.max.program.*; |
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30 |
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31 /** |
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32 * Assembler base class. |
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33 */ |
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34 public abstract class Assembler { |
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35 |
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36 private final Directives directives; |
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37 |
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38 protected Assembler(byte byteData, boolean isValidCode) { |
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39 this.directives = new Directives(byteData, isValidCode); |
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40 } |
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41 |
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42 public abstract ISA isa(); |
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43 |
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44 public final Directives directives() { |
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45 return directives; |
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46 } |
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47 |
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48 /** |
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49 * Gets the width of a word on machine for which the code is being assembled. |
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50 */ |
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51 public abstract WordWidth wordWidth(); |
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52 |
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53 /** |
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54 * Resets any internal state in this assembler to the equivalent state it had when first constructed. |
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55 * <p> |
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56 * This method is overridden as needed to ensure the state in subclasses is reset as well. Any |
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57 * overriding implementation must call this method in its superclass. |
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58 */ |
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59 public Assembler reset() { |
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60 boundLabels.clear(); |
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61 assembledObjects.clear(); |
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62 mutableAssembledObjects.clear(); |
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63 padOutput = false; |
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64 potentialExpansionSize = 0; |
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65 selectingLabelInstructions = true; |
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66 stream.reset(); |
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67 if (this instanceof Assembler32) { |
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68 final Assembler32 assembler32 = (Assembler32) this; |
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69 assembler32.setStartAddress(0); |
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70 } else if (this instanceof Assembler64) { |
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71 final Assembler64 assembler64 = (Assembler64) this; |
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72 assembler64.setStartAddress(0); |
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73 } |
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74 return this; |
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75 } |
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76 |
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77 /** |
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78 * A facility for including output during assembly that may not necessarily be decoded interpreted as code. |
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79 * |
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80 */ |
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81 public final class Directives { |
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82 |
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83 private final byte padByte; |
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84 private final boolean isValidCode; |
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85 |
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86 public Directives(byte padByte, boolean isValidCode) { |
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87 this.padByte = padByte; |
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88 this.isValidCode = isValidCode; |
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89 } |
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90 /** |
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91 * Inserts as many {@linkplain #padByte pad bytes} as necessary to ensure that the next assembled object starts |
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92 * at an address aligned by a given number. |
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93 * |
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94 * @param alignment |
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95 * the next assembled object is guaranteed to start at the next highest address starting at the |
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96 * current address that is divisible by this value. Note that this computed address will be the |
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97 * current address if the current address is already aligned by {@code alignment} |
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98 */ |
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99 private void alignIfSpaceLeftSmallerThan(int alignment, int requiredSpace, int alignmentStart) { |
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100 final int startPosition = currentPosition(); |
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101 |
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102 // We avoid sign problems with '%' below by masking off the sign bit: |
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103 final long unsignedAddend = (baseAddress() + startPosition + alignmentStart) & Long.MAX_VALUE; |
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104 |
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105 final int misalignmentSize = (int) (unsignedAddend % alignment); |
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106 final int padSize = misalignmentSize > 0 ? (alignment - misalignmentSize) : 0; |
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107 for (int i = 0; i < padSize; i++) { |
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108 emitByte(padByte); |
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109 } |
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110 new AlignmentPadding(Assembler.this, startPosition, currentPosition(), alignment, alignmentStart, requiredSpace, padByte) { |
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111 public boolean isCode() { |
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112 return isValidCode; |
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113 } |
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114 }; |
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115 } |
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116 |
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117 public void align(int alignment) { |
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118 alignIfSpaceLeftSmallerThan(alignment, alignment, 0); |
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119 } |
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120 |
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121 /** |
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122 * Enforce that the next assembled object fits within an aligned chunk. |
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123 * The specified space required by the next assembled object must be smaller or equals to the specified alignment. If the object cannot fit in the current chunk, |
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124 * Inserts as many {@linkplain #padByte pad bytes} as necessary to ensure that the next assembled object starts |
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125 * at the next alignment. |
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126 * |
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127 * @param alignment |
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128 * the next assembled object is guaranteed to fit in within a block of memory whose starting address is the next |
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129 * address starting at the |
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130 * current address that is divisible by this value. |
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131 * @param requiredSpace size of the next assembled object; it must be smaller or equals to alignment |
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132 */ |
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133 public boolean align(int alignment, int requiredSpace) { |
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134 if (alignment < requiredSpace) { |
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135 return false; |
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136 } |
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137 alignIfSpaceLeftSmallerThan(alignment, requiredSpace, 0); |
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138 return true; |
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139 } |
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140 |
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141 /** |
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142 * Inserts as many {@linkplain #padByte pad bytes} as necessary to ensure that the nth byte within the next assembled object starts |
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143 * at an address aligned by a given number. |
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144 * @param alignment |
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145 * @param alignmentStart where the alignment should start within the next assembled object. |
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146 */ |
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147 public void alignAfter(int alignment, int alignmentStart) { |
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148 alignIfSpaceLeftSmallerThan(alignment, alignment, alignmentStart); |
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149 } |
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150 |
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151 public void inlineByte(byte byteValue) { |
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152 addInlineData(currentPosition(), Bytes.SIZE); |
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153 emitByte(byteValue); |
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154 } |
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155 |
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156 public void inlineByteArray(byte[] byteArrayValue) { |
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157 addInlineData(currentPosition(), byteArrayValue.length); |
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158 emitByteArray(byteArrayValue, 0, byteArrayValue.length); |
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159 } |
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160 |
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161 public void inlineByteArray(byte[] byteArrayValue, int offset, int length) { |
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162 addInlineData(currentPosition(), length); |
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163 emitByteArray(byteArrayValue, offset, length); |
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164 } |
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165 |
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166 public void inlineShort(short shortValue) { |
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167 addInlineData(currentPosition(), Shorts.SIZE); |
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168 emitShort(shortValue); |
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169 } |
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170 |
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171 public void inlineInt(int intValue) { |
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172 addInlineData(currentPosition(), Ints.SIZE); |
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173 emitInt(intValue); |
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174 } |
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175 |
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176 public void inlineLong(long longValue) { |
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177 addInlineData(currentPosition(), Longs.SIZE); |
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178 emitLong(longValue); |
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179 } |
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180 |
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181 /** |
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182 * Inlines the absolute address of a position (represented by a given label) in the assembled code. |
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183 * The absolute address is calculated as {@code baseAddress() + label.position()}. The size |
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184 * of the inlined address is determined by {@link Assembler#wordWidth()}. |
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185 * |
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186 * @param label the label whose absolute address is to be inlined |
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187 */ |
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188 public AddressLiteral inlineAddress(Label label) { |
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189 final int startPosition = currentPosition(); |
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190 // Emit placeholder bytes |
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191 final WordWidth width = wordWidth(); |
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192 for (int i = 0; i < width.numberOfBytes; i++) { |
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193 emitByte((byte) 0); |
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194 } |
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195 final AddressLiteral addressLiteral = new AddressLiteral(Assembler.this, startPosition, currentPosition(), label); |
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196 assert addressLiteral.size() == width.numberOfBytes; |
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197 return addressLiteral; |
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198 } |
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199 |
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200 /** |
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201 * Inlines the offset between two positions (represented by given labels) in the assembled code. |
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202 * |
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203 * @param base the label whose position marks the base of the offset |
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204 * @param target the label whose position marks the target of the offset |
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205 * @param width the fixed size to be used for the offset |
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206 */ |
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207 public OffsetLiteral inlineOffset(Label target, Label base, WordWidth width) { |
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208 final int startPosition = currentPosition(); |
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209 for (int i = 0; i < width.numberOfBytes; i++) { |
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210 emitByte((byte) 0); |
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|
211 } |
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212 final OffsetLiteral offsetLiteral = new OffsetLiteral(Assembler.this, startPosition, currentPosition(), target, base); |
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213 assert offsetLiteral.size() == width.numberOfBytes; |
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214 return offsetLiteral; |
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|
215 } |
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216 } |
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217 |
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|
218 /** |
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219 * Gets the number of bytes that have been written to the underlying output stream. |
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220 */ |
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221 public int currentPosition() { |
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222 return stream.size(); |
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|
223 } |
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|
224 |
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|
225 /** |
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226 * Gets the start address of the code assembled by this assembler. |
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227 */ |
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228 public abstract long baseAddress(); |
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229 |
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230 private ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
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231 |
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232 protected void emitByte(int byteValue) { |
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|
233 stream.write(byteValue); |
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|
234 } |
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|
235 |
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|
236 protected void emitZeroes(int count) { |
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237 for (int i = 0; i < count; ++i) { |
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|
238 stream.write(0); |
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|
239 } |
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|
240 } |
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|
241 |
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|
242 protected abstract void emitShort(short shortValue); |
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|
243 |
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244 protected abstract void emitInt(int intValue); |
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245 |
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|
246 protected abstract void emitLong(long longValue); |
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247 |
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248 public void emitByteArray(byte[] byteArrayValue, int off, int len) { |
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249 stream.write(byteArrayValue, off, len); |
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|
250 } |
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251 |
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252 private boolean selectingLabelInstructions = true; |
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253 |
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254 boolean selectingLabelInstructions() { |
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255 return selectingLabelInstructions; |
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256 } |
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257 |
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258 private final Set<Label> boundLabels = Collections.newSetFromMap(new IdentityHashMap<Label, Boolean>()); |
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259 |
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260 public Set<Label> boundLabels() { |
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261 return boundLabels; |
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262 } |
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263 |
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264 /** |
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265 * Binds a given label to the current position in the assembler's instruction stream. The assembler may update the |
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266 * label's position if any emitted instructions change lengths, so that this label keeps addressing the same logical |
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267 * position. |
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268 * |
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269 * @param label |
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270 * the label that is to be bound to the current position |
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271 * |
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272 * @see Label#fix32 |
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273 */ |
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274 public final void bindLabel(Label label) { |
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275 label.bind(currentPosition()); |
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276 boundLabels.add(label); |
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277 } |
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278 |
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279 private final List<AssembledObject> assembledObjects = new LinkedList<AssembledObject>(); |
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280 private final List<MutableAssembledObject> mutableAssembledObjects = new LinkedList<MutableAssembledObject>(); |
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281 |
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282 private int potentialExpansionSize; |
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283 |
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284 /** |
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285 * Adds the description of an instruction that is fixed in size. |
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286 * |
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287 * @param fixedSizeAssembledObject |
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288 */ |
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289 void addFixedSizeAssembledObject(AssembledObject fixedSizeAssembledObject) { |
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290 assembledObjects.add(fixedSizeAssembledObject); |
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291 if (fixedSizeAssembledObject instanceof MutableAssembledObject) { |
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292 mutableAssembledObjects.add((MutableAssembledObject) fixedSizeAssembledObject); |
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293 } |
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294 } |
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295 |
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296 /** |
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297 * Adds the description of an instruction that can change in size, depending on where it is located in the |
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298 * instruction and/or where another object it addresses is located in the instruction stream. |
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299 * |
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300 * @param spanDependentInstruction |
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301 */ |
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302 void addSpanDependentInstruction(InstructionWithOffset spanDependentInstruction) { |
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303 assembledObjects.add(spanDependentInstruction); |
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304 mutableAssembledObjects.add(spanDependentInstruction); |
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305 // A span-dependent instruction's offset operand can potentially grow from 8 bits to 32 bits. |
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306 // Also, some instructions need an extra byte for encoding when not using an 8-bit operand. |
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307 // Together, this might enlarge every span-dependent label instruction by maximally 4 bytes. |
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308 potentialExpansionSize += 4; |
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309 } |
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310 |
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311 void addAlignmentPadding(AlignmentPadding alignmentPadding) { |
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312 assembledObjects.add(alignmentPadding); |
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313 mutableAssembledObjects.add(alignmentPadding); |
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314 potentialExpansionSize += alignmentPadding.alignment() - alignmentPadding.size(); |
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315 } |
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316 |
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317 void addInlineData(int startPosition, int size) { |
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318 assembledObjects.add(new AssembledObject(startPosition, startPosition + size) { |
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319 public boolean isCode() { |
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320 return false; |
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321 } |
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322 }); |
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323 } |
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324 |
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325 private void gatherLabels() throws AssemblyException { |
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326 for (AssembledObject assembledObject : assembledObjects) { |
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327 if (assembledObject instanceof InstructionWithLabel) { |
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328 final InstructionWithLabel labelInstruction = (InstructionWithLabel) assembledObject; |
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329 switch (labelInstruction.label().state()) { |
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330 case UNASSIGNED: |
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331 throw new AssemblyException("unassigned label"); |
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332 case BOUND: |
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333 boundLabels.add(labelInstruction.label()); |
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334 break; |
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335 default: |
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336 break; |
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337 } |
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338 } |
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339 } |
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340 } |
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341 |
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342 private boolean updateSpanDependentInstruction(InstructionWithOffset instruction) throws AssemblyException { |
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343 if (!instruction.updateLabelSize()) { |
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344 return false; |
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345 } |
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346 final int oldSize = instruction.size(); |
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347 final int oldEndPosition = instruction.endPosition(); |
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348 stream.reset(); |
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349 instruction.assemble(); |
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350 final int newSize = stream.toByteArray().length; |
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351 instruction.setSize(newSize); |
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352 final int delta = newSize - oldSize; |
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353 adjustMutableAssembledObjects(delta, oldEndPosition, null); |
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354 return true; |
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355 } |
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356 |
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357 private boolean updateAlignmentPadding(AlignmentPadding alignmentPadding) throws AssemblyException { |
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358 final int oldSize = alignmentPadding.size(); |
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359 final int oldEndPosition = alignmentPadding.endPosition(); |
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360 alignmentPadding.updatePadding(); |
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361 final int newSize = alignmentPadding.size(); |
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362 if (oldSize != newSize) { |
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363 // Only if the padding expanded will subsequent objects in the stream need to be adjusted |
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364 final int delta = newSize - oldSize; |
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365 adjustMutableAssembledObjects(delta, oldEndPosition, alignmentPadding); |
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366 return true; |
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367 } |
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368 return false; |
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|
369 } |
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370 |
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|
371 /** |
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372 * Adjusts the position of all the mutable objects that are currently at or after a given position. |
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|
373 * |
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374 * @param delta the amount by which the position of each mutable object is to be adjusted |
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375 * @param startPosition only mutable objects whose current {@linkplain AssembledObject#startPosition() start |
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376 * position} is equal to or greater than this value are adjusted |
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377 * @param adjustedPadding the padding object whose adjustment caused the need for this call. If this call was made |
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378 * for some other reason than having adjusted a padding object's size, then this value will be null. In this |
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parents:
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379 * value is not null, then its position will not be adjusted by this call. |
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parents:
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380 */ |
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parents:
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381 private void adjustMutableAssembledObjects(int delta, int startPosition, AlignmentPadding adjustedPadding) throws AssemblyException { |
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parents:
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382 for (Label label : boundLabels) { |
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parents:
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|
383 if (label.position() >= startPosition) { |
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parents:
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|
384 label.adjust(delta); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
385 } |
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parents:
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|
386 } |
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parents:
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387 |
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parents:
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388 for (MutableAssembledObject mutableAssembledObject : mutableAssembledObjects) { |
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parents:
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389 if (mutableAssembledObject != adjustedPadding && mutableAssembledObject.startPosition() >= startPosition) { |
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parents:
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390 mutableAssembledObject.adjust(delta); |
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parents:
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391 } |
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parents:
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392 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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393 } |
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394 |
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parents:
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395 private void updateSpanDependentVariableInstructions() throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
396 boolean changed; |
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parents:
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|
397 do { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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398 changed = false; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
399 for (MutableAssembledObject mutableAssembledObject : mutableAssembledObjects) { |
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parents:
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400 if (mutableAssembledObject instanceof InstructionWithOffset) { |
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parents:
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401 changed |= updateSpanDependentInstruction((InstructionWithOffset) mutableAssembledObject); |
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parents:
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402 } else if (mutableAssembledObject instanceof AlignmentPadding) { |
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parents:
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403 changed |= updateAlignmentPadding((AlignmentPadding) mutableAssembledObject); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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404 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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changeset
|
405 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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406 } while (changed); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
407 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
408 |
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parents:
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409 private int writeOutput(OutputStream outputStream, byte[] initialBytes, InlineDataRecorder inlineDataRecorder) throws IOException, AssemblyException { |
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410 selectingLabelInstructions = false; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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411 int bytesWritten = 0; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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412 try { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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413 int initialOffset = 0; |
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parents:
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|
414 for (AssembledObject assembledObject : assembledObjects) { |
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parents:
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415 if (inlineDataRecorder != null && !assembledObject.isCode()) { |
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parents:
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416 inlineDataRecorder.add(new InlineDataDescriptor.ByteData(assembledObject.startPosition(), assembledObject.size())); |
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parents:
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417 } |
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|
418 |
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419 if (assembledObject instanceof MutableAssembledObject) { |
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420 final MutableAssembledObject mutableAssembledObject = (MutableAssembledObject) assembledObject; |
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|
421 |
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|
422 // Copy the original assembler output between the end of the last mutable assembled object and the start of the current one |
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parents:
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423 final int length = mutableAssembledObject.initialStartPosition() - initialOffset; |
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424 outputStream.write(initialBytes, initialOffset, length); |
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425 bytesWritten += length; |
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parents:
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|
426 |
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parents:
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427 // Now (re)assemble the mutable assembled object |
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428 stream.reset(); |
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parents:
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|
429 mutableAssembledObject.assemble(); |
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430 stream.writeTo(outputStream); |
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431 bytesWritten += stream.size(); |
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parents:
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changeset
|
432 initialOffset = mutableAssembledObject.initialEndPosition(); |
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433 } else { |
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parents:
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|
434 // Copy the original assembler output between the end of the last assembled object and the end of current one |
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parents:
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|
435 final int length = assembledObject.endPosition() - initialOffset; |
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parents:
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changeset
|
436 outputStream.write(initialBytes, initialOffset, length); |
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parents:
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|
437 bytesWritten += length; |
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parents:
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changeset
|
438 initialOffset = assembledObject.endPosition(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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changeset
|
439 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
440 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
441 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
442 // Copy the original assembler output (if any) after the last mutable assembled object |
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parents:
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|
443 outputStream.write(initialBytes, initialOffset, initialBytes.length - initialOffset); |
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parents:
diff
changeset
|
444 bytesWritten += initialBytes.length - initialOffset; |
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Added Java files from Maxine project.
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parents:
diff
changeset
|
445 |
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parents:
diff
changeset
|
446 if (padOutput) { |
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parents:
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changeset
|
447 final int padding = (initialBytes.length + potentialExpansionSize) - bytesWritten; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
448 assert padding >= 0; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
449 if (padding > 0) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
450 stream.reset(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
451 emitPadding(padding); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
452 stream.writeTo(outputStream); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
453 bytesWritten += padding; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
454 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
455 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
456 return bytesWritten; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
457 } finally { |
e233f5660da4
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
458 selectingLabelInstructions = true; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
459 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
460 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
461 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
462 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
463 * Emits padding to the instruction stream in the form of NOP instructions. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
464 * |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
465 * @param numberOfBytes |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
466 * @throws AssemblyException if exactly {@code numberOfBytes} cannot be emitted as a sequence of one or more valid NOP instructions |
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parents:
diff
changeset
|
467 */ |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
468 protected abstract void emitPadding(int numberOfBytes) throws AssemblyException; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
469 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
470 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
471 * Writes the object code assembled so far to a given output stream. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
472 * |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
473 * @return the number of bytes written {@code outputStream} |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
474 * @throws AssemblyException |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
475 * if there any problem with binding labels to addresses |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
476 */ |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
477 public int output(OutputStream outputStream, InlineDataRecorder inlineDataRecorder) throws IOException, AssemblyException { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
478 final int upperLimitForCurrentOutputSize = upperLimitForCurrentOutputSize(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
479 final byte[] initialBytes = stream.toByteArray(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
480 gatherLabels(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
481 updateSpanDependentVariableInstructions(); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
482 final int bytesWritten = writeOutput(outputStream, initialBytes, inlineDataRecorder); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
483 assert !padOutput || upperLimitForCurrentOutputSize == bytesWritten; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
484 return bytesWritten; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
485 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
486 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
487 /** |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
488 * Gets the maximum size of the code array that would be assembled by a call to {@link #output(OutputStream)} or |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
489 * {@link #toByteArray()}. For a variable sized instruction set (e.g. x86), the exact size may be known until the |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
490 * code is assembled as the size of certain instructions depends on their position in the instruction and/or the |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
491 * {@linkplain #baseAddress() base address} at which the code is being assembled. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
492 * <p> |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
493 * <b>Note that any subsequent call that adds a new instruction to the instruction stream invalidates the value |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
494 * returned by this method.</b> |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
495 */ |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
496 public int upperLimitForCurrentOutputSize() { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
497 return currentPosition() + potentialExpansionSize; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
498 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
499 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
500 private boolean padOutput; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
501 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
502 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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503 * Sets or unsets the flag determining if the code assembled by a call to {@link #output(OutputStream)} or |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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504 * {@link #toByteArray()} should be padded with NOPs at the end to ensure that the code size equals the value |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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505 * returned by {@link #upperLimitForCurrentOutputSize()}. This default value of the flag is {@code false}. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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506 */ |
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parents:
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507 public void setPadOutput(boolean flag) { |
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parents:
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508 padOutput = flag; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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509 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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510 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
511 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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512 * Returns the object code assembled so far in a byte array. |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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513 * |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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514 * @throws AssemblyException |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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515 * if there any problem with binding labels to addresses |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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516 */ |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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517 public byte[] toByteArray(InlineDataRecorder inlineDataRecorder) throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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518 final ByteArrayOutputStream baos = new ByteArrayOutputStream(upperLimitForCurrentOutputSize()); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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519 try { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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520 output(baos, inlineDataRecorder); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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521 baos.close(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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522 final byte[] result = baos.toByteArray(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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523 return result; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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524 } catch (IOException ioException) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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525 throw ProgramError.unexpected("IOException during output to byte array", ioException); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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526 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
527 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
528 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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529 public byte[] toByteArray() throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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530 return toByteArray(null); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
531 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
532 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
533 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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534 * @see Label#fix32(int) |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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535 */ |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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536 protected void fixLabel32(Label label, int address32) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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537 label.fix32(address32); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
538 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
539 |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
540 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
541 * @see Label#fix64(long) |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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542 */ |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
543 protected void fixLabel64(Label label, long address64) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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544 label.fix64(address64); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
545 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
546 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
547 protected int address32(Label label) throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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548 return label.address32(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
549 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
550 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
551 protected long address64(Label label) throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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552 return label.address64(); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
553 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
554 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
555 protected void checkConstraint(boolean passed, String expression) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
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|
556 if (!passed) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
557 throw new IllegalArgumentException(expression); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
558 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
559 } |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
560 |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
561 /** |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
562 * Calculate the difference between two Labels. This works whether the labels |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
563 * are fixed or bound. |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
564 * @throws AssemblyException |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
565 */ |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
566 public int labelOffsetRelative(Label label, Label relativeTo) throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
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|
567 return labelOffsetRelative(label, 0) - labelOffsetRelative(relativeTo, 0); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
568 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
569 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
570 /** |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
571 * Calculate the difference between a Label and a position within the assembled code. |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
572 * @throws AssemblyException |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
573 */ |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
574 public int labelOffsetRelative(Label label, int position) throws AssemblyException { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
575 switch (label.state()) { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
576 case BOUND: { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
577 return label.position() - position; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
578 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
579 case FIXED_32: { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
580 final Assembler32 assembler32 = (Assembler32) this; |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
581 return assembler32.address(label) - (assembler32.startAddress() + position); |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
582 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
583 case FIXED_64: { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
584 final Assembler64 assembler64 = (Assembler64) this; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
585 final long offset64 = assembler64.address(label) - (assembler64.startAddress() + position); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
586 if (Longs.numberOfEffectiveSignedBits(offset64) > 32) { |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
587 throw new AssemblyException("fixed 64-bit label out of 32-bit range"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
588 } |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
589 return (int) offset64; |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
590 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
591 default: { |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
592 throw new AssemblyException("unassigned label"); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
593 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
594 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
595 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
596 |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
597 /** |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
598 * Calculate the difference between a Label and an assembled object. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
599 * Different CPUs have different conventions for which end of an |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
600 * instruction to measure from. |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
601 * @throws AssemblyException |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
602 */ |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
603 public final int offsetInstructionRelative(Label label, AssemblyObject assembledObject) throws AssemblyException { |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
604 final int position = (isa().relativeBranchFromStart) ? assembledObject.startPosition() : assembledObject.endPosition(); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
605 return labelOffsetRelative(label, position); |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
606 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
607 } |