1 /* 2 * Copyright 2013, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.dexlib2; 33 34 import com.google.common.collect.Maps; 35 import com.google.common.collect.RangeMap; 36 37 import javax.annotation.Nonnull; 38 import javax.annotation.Nullable; 39 import java.util.EnumMap; 40 import java.util.HashMap; 41 42 import static org.jf.dexlib2.VersionMap.NO_VERSION; 43 import static org.jf.dexlib2.VersionMap.mapApiToArtVersion; 44 import static org.jf.dexlib2.VersionMap.mapArtVersionToApi; 45 46 public class Opcodes { 47 48 /** 49 * Either the api level for dalvik opcodes, or the art version for art opcodes 50 */ 51 public final int api; 52 public final int artVersion; 53 @Nonnull private final Opcode[] opcodesByValue = new Opcode[255]; 54 @Nonnull private final EnumMap<Opcode, Short> opcodeValues; 55 @Nonnull private final HashMap<String, Opcode> opcodesByName; 56 57 @Nonnull 58 public static Opcodes forApi(int api) { 59 return new Opcodes(api, NO_VERSION, false); 60 } 61 62 @Nonnull 63 public static Opcodes forApi(int api, boolean experimental) { 64 return new Opcodes(api, NO_VERSION, experimental); 65 } 66 67 @Nonnull 68 public static Opcodes forArtVersion(int artVersion) { 69 return forArtVersion(artVersion, false); 70 } 71 72 @Nonnull 73 public static Opcodes forArtVersion(int artVersion, boolean experimental) { 74 return new Opcodes(NO_VERSION, artVersion, experimental); 75 } 76 77 @Deprecated 78 public Opcodes(int api) { 79 this(api, false); 80 } 81 82 @Deprecated 83 public Opcodes(int api, boolean experimental) { 84 this(api, VersionMap.mapApiToArtVersion(api), experimental); 85 } 86 87 private Opcodes(int api, int artVersion, boolean experimental) { 88 if (api >= 21) { 89 this.api = api; 90 this.artVersion = mapApiToArtVersion(api); 91 } else if (artVersion >= 0 && artVersion < 39) { 92 this.api = mapArtVersionToApi(artVersion); 93 this.artVersion = artVersion; 94 } else { 95 this.api = api; 96 this.artVersion = artVersion; 97 } 98 99 opcodeValues = new EnumMap<Opcode, Short>(Opcode.class); 100 opcodesByName = Maps.newHashMap(); 101 102 int version; 103 if (isArt()) { 104 version = this.artVersion; 105 } else { 106 version = this.api; 107 } 108 109 for (Opcode opcode: Opcode.values()) { 110 RangeMap<Integer, Short> versionToValueMap; 111 112 if (isArt()) { 113 versionToValueMap = opcode.artVersionToValueMap; 114 } else { 115 versionToValueMap = opcode.apiToValueMap; 116 } 117 118 Short opcodeValue = versionToValueMap.get(version); 119 if (opcodeValue != null && (!opcode.isExperimental() || experimental)) { 120 if (!opcode.format.isPayloadFormat) { 121 opcodesByValue[opcodeValue] = opcode; 122 } 123 opcodeValues.put(opcode, opcodeValue); 124 opcodesByName.put(opcode.name.toLowerCase(), opcode); 125 } 126 } 127 } 128 129 @Nullable 130 public Opcode getOpcodeByName(@Nonnull String opcodeName) { 131 return opcodesByName.get(opcodeName.toLowerCase()); 132 } 133 134 @Nullable 135 public Opcode getOpcodeByValue(int opcodeValue) { 136 switch (opcodeValue) { 137 case 0x100: 138 return Opcode.PACKED_SWITCH_PAYLOAD; 139 case 0x200: 140 return Opcode.SPARSE_SWITCH_PAYLOAD; 141 case 0x300: 142 return Opcode.ARRAY_PAYLOAD; 143 default: 144 if (opcodeValue >= 0 && opcodeValue < opcodesByValue.length) { 145 return opcodesByValue[opcodeValue]; 146 } 147 return null; 148 } 149 } 150 151 @Nullable 152 public Short getOpcodeValue(@Nonnull Opcode opcode) { 153 return opcodeValues.get(opcode); 154 } 155 156 public boolean isArt() { 157 return artVersion != NO_VERSION; 158 } 159 } 160