1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/bytecode.py Thu Oct 28 20:47:25 2004 +0200
1.3 @@ -0,0 +1,240 @@
1.4 +#!/usr/bin/env python
1.5 +
1.6 +"""
1.7 +Java bytecode conversion. Specification found at the following URL:
1.8 +http://java.sun.com/docs/books/vmspec/2nd-edition/html/Instructions2.doc.html
1.9 +"""
1.10 +
1.11 +import dis # for access to Python bytecode values
1.12 +
1.13 +# Bytecode conversion.
1.14 +
1.15 +def get_instructions(code):
1.16 + global java_bytecodes
1.17 +
1.18 + i = 0
1.19 + instructions = []
1.20 + while i < len(code):
1.21 + bytecode = ord(code[i])
1.22 + mnemonic, number_of_arguments, stack_change = java_bytecodes[bytecode]
1.23 +
1.24 + # NOTE: To be fixed.
1.25 + if number_of_arguments is None:
1.26 + print "Stop at", mnemonic
1.27 + return instructions
1.28 +
1.29 + arguments = []
1.30 + for j in range(0, number_of_arguments):
1.31 + arguments.append(ord(code[i + 1 + j]))
1.32 +
1.33 + i = i + 1 + number_of_arguments
1.34 + instructions.append((mnemonic, arguments))
1.35 +
1.36 + return instructions
1.37 +
1.38 +java_bytecodes = {
1.39 + # code : (mnemonic, number of following bytes, change in stack)
1.40 + 0 : ("nop", 0, 0),
1.41 + 1 : ("aconst_null", 0, 1),
1.42 + 2 : ("iconst_m1", 0, 1),
1.43 + 3 : ("iconst_0", 0, 1),
1.44 + 4 : ("iconst_1", 0, 1),
1.45 + 5 : ("iconst_2", 0, 1),
1.46 + 6 : ("iconst_3", 0, 1),
1.47 + 7 : ("iconst_4", 0, 1),
1.48 + 8 : ("iconst_5", 0, 1),
1.49 + 9 : ("lconst_0", 0, 1),
1.50 + 10 : ("lconst_1", 0, 1),
1.51 + 11 : ("fconst_0", 0, 1),
1.52 + 12 : ("fconst_1", 0, 1),
1.53 + 13 : ("fconst_2", 0, 1),
1.54 + 14 : ("dconst_0", 0, 1),
1.55 + 15 : ("dconst_1", 0, 1),
1.56 + 16 : ("bipush", 1, 1),
1.57 + 17 : ("sipush", 2, 1),
1.58 + 18 : ("ldc", 1, 1),
1.59 + 19 : ("ldc_w", 2, 1),
1.60 + 20 : ("ldc2_w", 2, 1),
1.61 + 21 : ("iload", 1, 1),
1.62 + 22 : ("lload", 1, 1),
1.63 + 23 : ("fload", 1, 1),
1.64 + 24 : ("dload", 1, 1),
1.65 + 25 : ("aload", 1, 1),
1.66 + 26 : ("iload_0", 0, 1),
1.67 + 27 : ("iload_1", 0, 1),
1.68 + 28 : ("iload_2", 0, 1),
1.69 + 29 : ("iload_3", 0, 1),
1.70 + 30 : ("lload_0", 0, 1),
1.71 + 31 : ("lload_1", 0, 1),
1.72 + 32 : ("lload_2", 0, 1),
1.73 + 33 : ("lload_3", 0, 1),
1.74 + 34 : ("fload_0", 0, 1),
1.75 + 35 : ("fload_1", 0, 1),
1.76 + 36 : ("fload_2", 0, 1),
1.77 + 37 : ("fload_3", 0, 1),
1.78 + 38 : ("dload_0", 0, 1),
1.79 + 39 : ("dload_1", 0, 1),
1.80 + 40 : ("dload_2", 0, 1),
1.81 + 41 : ("dload_3", 0, 1),
1.82 + 42 : ("aload_0", 0, 1),
1.83 + 43 : ("aload_1", 0, 1),
1.84 + 44 : ("aload_2", 0, 1),
1.85 + 45 : ("aload_3", 0, 1),
1.86 + 46 : ("iaload", 0, -1),
1.87 + 47 : ("laload", 0, -1),
1.88 + 48 : ("faload", 0, -1),
1.89 + 49 : ("daload", 0, -1),
1.90 + 50 : ("aaload", 0, -1),
1.91 + 51 : ("baload", 0, -1),
1.92 + 52 : ("caload", 0, -1),
1.93 + 53 : ("saload", 0, -1),
1.94 + 54 : ("istore", 1, -1),
1.95 + 55 : ("lstore", 1, -1),
1.96 + 56 : ("fstore", 1, -1),
1.97 + 57 : ("dstore", 1, -1),
1.98 + 58 : ("astore", 1, -1),
1.99 + 59 : ("istore_0", 0, -1),
1.100 + 60 : ("istore_1", 0, -1),
1.101 + 61 : ("istore_2", 0, -1),
1.102 + 62 : ("istore_3", 0, -1),
1.103 + 63 : ("lstore_0", 0, -1),
1.104 + 64 : ("lstore_1", 0, -1),
1.105 + 65 : ("lstore_2", 0, -1),
1.106 + 66 : ("lstore_3", 0, -1),
1.107 + 67 : ("fstore_0", 0, -1),
1.108 + 68 : ("fstore_1", 0, -1),
1.109 + 69 : ("fstore_2", 0, -1),
1.110 + 70 : ("fstore_3", 0, -1),
1.111 + 71 : ("dstore_0", 0, -1),
1.112 + 72 : ("dstore_1", 0, -1),
1.113 + 73 : ("dstore_2", 0, -1),
1.114 + 74 : ("dstore_3", 0, -1),
1.115 + 75 : ("astore_0", 0, -1),
1.116 + 76 : ("astore_1", 0, -1),
1.117 + 77 : ("astore_2", 0, -1),
1.118 + 78 : ("astore_3", 0, -1),
1.119 + 79 : ("iastore", 0, -3),
1.120 + 80 : ("lastore", 0, -3),
1.121 + 81 : ("fastore", 0, -3),
1.122 + 82 : ("dastore", 0, -3),
1.123 + 83 : ("aastore", 0, -3),
1.124 + 84 : ("bastore", 0, -3),
1.125 + 85 : ("castore", 0, -3),
1.126 + 86 : ("sastore", 0, -3),
1.127 + 87 : ("pop", 0, -1),
1.128 + 88 : ("pop2", 0, None), # variable number of elements removed
1.129 + 89 : ("dup", 0, 1),
1.130 + 90 : ("dup_x1", 0, 1),
1.131 + 91 : ("dup_x2", 0, 1),
1.132 + 92 : ("dup2", 0, 2), # or 1 extra stack value
1.133 + 93 : ("dup2_x1", 0, 2), # or 1 extra stack value
1.134 + 94 : ("dup2_x2", 0, 2), # or 1 extra stack value
1.135 + 95 : ("swap", 0, 0),
1.136 + 96 : ("iadd", 0, -1),
1.137 + 97 : ("ladd", 0, -1),
1.138 + 98 : ("fadd", 0, -1),
1.139 + 99 : ("dadd", 0, -1),
1.140 + 100 : ("isub", 0, -1),
1.141 + 101 : ("lsub", 0, -1),
1.142 + 102 : ("fsub", 0, -1),
1.143 + 103 : ("dsub", 0, -1),
1.144 + 104 : ("imul", 0, -1),
1.145 + 105 : ("lmul", 0, -1),
1.146 + 106 : ("fmul", 0, -1),
1.147 + 107 : ("dmul", 0, -1),
1.148 + 108 : ("idiv", 0, -1),
1.149 + 109 : ("ldiv", 0, -1),
1.150 + 110 : ("fdiv", 0, -1),
1.151 + 111 : ("ddiv", 0, -1),
1.152 + 112 : ("irem", 0, -1),
1.153 + 113 : ("lrem", 0, -1),
1.154 + 114 : ("frem", 0, -1),
1.155 + 115 : ("drem", 0, -1),
1.156 + 116 : ("ineg", 0, 0),
1.157 + 117 : ("lneg", 0, 0),
1.158 + 118 : ("fneg", 0, 0),
1.159 + 119 : ("dneg", 0, 0),
1.160 + 120 : ("ishl", 0, -1),
1.161 + 121 : ("lshl", 0, -1),
1.162 + 122 : ("ishr", 0, -1),
1.163 + 123 : ("lshr", 0, -1),
1.164 + 124 : ("iushr", 0, -1),
1.165 + 125 : ("lushr", 0, -1),
1.166 + 126 : ("iand", 0, -1),
1.167 + 127 : ("land", 0, -1),
1.168 + 128 : ("ior", 0, -1),
1.169 + 129 : ("lor", 0, -1),
1.170 + 130 : ("ixor", 0, -1),
1.171 + 131 : ("lxor", 0, -1),
1.172 + 132 : ("iinc", 2, 0),
1.173 + 133 : ("i2l", 0, 0),
1.174 + 134 : ("i2f", 0, 0),
1.175 + 135 : ("i2d", 0, 0),
1.176 + 136 : ("l2i", 0, 0),
1.177 + 137 : ("l2f", 0, 0),
1.178 + 138 : ("l2d", 0, 0),
1.179 + 139 : ("f2i", 0, 0),
1.180 + 140 : ("f2l", 0, 0),
1.181 + 141 : ("f2d", 0, 0),
1.182 + 142 : ("d2i", 0, 0),
1.183 + 143 : ("d2l", 0, 0),
1.184 + 144 : ("d2f", 0, 0),
1.185 + 145 : ("i2b", 0, 0),
1.186 + 146 : ("i2c", 0, 0),
1.187 + 147 : ("i2s", 0, 0),
1.188 + 148 : ("lcmp", 0, -1),
1.189 + 149 : ("fcmpl", 0, -1),
1.190 + 150 : ("fcmpg", 0, -1),
1.191 + 151 : ("dcmpl", 0, -1),
1.192 + 152 : ("dcmpg", 0, -1),
1.193 + 153 : ("ifeq", 2, -1),
1.194 + 154 : ("ifne", 2, -1),
1.195 + 155 : ("iflt", 2, -1),
1.196 + 156 : ("ifge", 2, -1),
1.197 + 157 : ("ifgt", 2, -1),
1.198 + 158 : ("ifle", 2, -1),
1.199 + 159 : ("if_icmpeq", 2, -2),
1.200 + 160 : ("if_icmpne", 2, -2),
1.201 + 161 : ("if_icmplt", 2, -2),
1.202 + 162 : ("if_icmpge", 2, -2),
1.203 + 163 : ("if_icmpgt", 2, -2),
1.204 + 164 : ("if_icmple", 2, -2),
1.205 + 165 : ("if_acmpeq", 2, -2),
1.206 + 166 : ("if_acmpne", 2, -2),
1.207 + 167 : ("goto", 2, 0),
1.208 + 168 : ("jsr", 2, 1),
1.209 + 169 : ("ret", 1, 0),
1.210 + 170 : ("tableswitch", None, -1), # variable number of arguments
1.211 + 171 : ("lookupswitch", None, -1), # variable number of arguments
1.212 + 172 : ("ireturn", 0, -1),
1.213 + 173 : ("lreturn", 0, -1),
1.214 + 174 : ("freturn", 0, -1),
1.215 + 175 : ("dreturn", 0, -1),
1.216 + 176 : ("areturn", 0, -1),
1.217 + 177 : ("return", 0, 0),
1.218 + 178 : ("getstatic", 2, 1),
1.219 + 179 : ("putstatic", 2, -1),
1.220 + 180 : ("getfield", 2, 0),
1.221 + 181 : ("putfield", 2, -2),
1.222 + 182 : ("invokevirtual", 2, None), # variable number of elements removed
1.223 + 183 : ("invokespecial", 2, None), # variable number of elements removed
1.224 + 184 : ("invokestatic", 2, None), # variable number of elements removed
1.225 + 185 : ("invokeinterface", 4, None), # variable number of elements removed
1.226 + 187 : ("new", 2, 1),
1.227 + 188 : ("newarray", 1, 0),
1.228 + 189 : ("anewarray", 2, 0),
1.229 + 190 : ("arraylength", 0, 0),
1.230 + 191 : ("athrow", 0, 0),
1.231 + 192 : ("checkcast", 2, 0),
1.232 + 193 : ("instanceof", 2, 0),
1.233 + 194 : ("monitorenter", 0, -1),
1.234 + 195 : ("monitorexit", 0, -1),
1.235 + 196 : ("wide", None, None), # 3 or 5 arguments, stack changes according to modified element
1.236 + 197 : ("multianewarray", 3, None), # variable number of elements removed
1.237 + 198 : ("ifnull", 2, -1),
1.238 + 199 : ("ifnonnull", 2, -1),
1.239 + 200 : ("goto_w", 4, 0),
1.240 + 201 : ("jsr_w", 4, 1),
1.241 + }
1.242 +
1.243 +# vim: tabstop=4 expandtab shiftwidth=4
