Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2007-2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include <assert.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdarg.h> |
| 31 | |
| 32 | #include "v8.h" |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 33 | |
| 34 | #if defined(V8_TARGET_ARCH_IA32) |
| 35 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 36 | #include "disasm.h" |
| 37 | |
| 38 | namespace disasm { |
| 39 | |
| 40 | enum OperandOrder { |
| 41 | UNSET_OP_ORDER = 0, |
| 42 | REG_OPER_OP_ORDER, |
| 43 | OPER_REG_OP_ORDER |
| 44 | }; |
| 45 | |
| 46 | |
| 47 | //------------------------------------------------------------------ |
| 48 | // Tables |
| 49 | //------------------------------------------------------------------ |
| 50 | struct ByteMnemonic { |
| 51 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 52 | const char* mnem; |
| 53 | OperandOrder op_order_; |
| 54 | }; |
| 55 | |
| 56 | |
| 57 | static ByteMnemonic two_operands_instr[] = { |
| 58 | {0x03, "add", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 59 | {0x09, "or", OPER_REG_OP_ORDER}, |
| 60 | {0x0B, "or", REG_OPER_OP_ORDER}, |
| 61 | {0x1B, "sbb", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 62 | {0x21, "and", OPER_REG_OP_ORDER}, |
| 63 | {0x23, "and", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 64 | {0x29, "sub", OPER_REG_OP_ORDER}, |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 65 | {0x2A, "subb", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 66 | {0x2B, "sub", REG_OPER_OP_ORDER}, |
Leon Clarke | eab96aa | 2010-01-27 16:31:12 +0000 | [diff] [blame] | 67 | {0x31, "xor", OPER_REG_OP_ORDER}, |
| 68 | {0x33, "xor", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 69 | {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 70 | {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 71 | {0x3B, "cmp", REG_OPER_OP_ORDER}, |
| 72 | {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 73 | {0x85, "test", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 74 | {0x87, "xchg", REG_OPER_OP_ORDER}, |
| 75 | {0x8A, "mov_b", REG_OPER_OP_ORDER}, |
| 76 | {0x8B, "mov", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 77 | {0x8D, "lea", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 78 | {-1, "", UNSET_OP_ORDER} |
| 79 | }; |
| 80 | |
| 81 | |
| 82 | static ByteMnemonic zero_operands_instr[] = { |
| 83 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 84 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 85 | {0x90, "nop", UNSET_OP_ORDER}, |
| 86 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 87 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 88 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 89 | {0x61, "popad", UNSET_OP_ORDER}, |
| 90 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 91 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 92 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 93 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 94 | {0x9B, "fwait", UNSET_OP_ORDER}, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 95 | {0xFC, "cld", UNSET_OP_ORDER}, |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 96 | {0xAB, "stos", UNSET_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 97 | {-1, "", UNSET_OP_ORDER} |
| 98 | }; |
| 99 | |
| 100 | |
| 101 | static ByteMnemonic call_jump_instr[] = { |
| 102 | {0xE8, "call", UNSET_OP_ORDER}, |
| 103 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 104 | {-1, "", UNSET_OP_ORDER} |
| 105 | }; |
| 106 | |
| 107 | |
| 108 | static ByteMnemonic short_immediate_instr[] = { |
| 109 | {0x05, "add", UNSET_OP_ORDER}, |
| 110 | {0x0D, "or", UNSET_OP_ORDER}, |
| 111 | {0x15, "adc", UNSET_OP_ORDER}, |
| 112 | {0x25, "and", UNSET_OP_ORDER}, |
| 113 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 114 | {0x35, "xor", UNSET_OP_ORDER}, |
| 115 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 116 | {-1, "", UNSET_OP_ORDER} |
| 117 | }; |
| 118 | |
| 119 | |
| 120 | static const char* jump_conditional_mnem[] = { |
| 121 | /*0*/ "jo", "jno", "jc", "jnc", |
| 122 | /*4*/ "jz", "jnz", "jna", "ja", |
| 123 | /*8*/ "js", "jns", "jpe", "jpo", |
| 124 | /*12*/ "jl", "jnl", "jng", "jg" |
| 125 | }; |
| 126 | |
| 127 | |
| 128 | static const char* set_conditional_mnem[] = { |
| 129 | /*0*/ "seto", "setno", "setc", "setnc", |
| 130 | /*4*/ "setz", "setnz", "setna", "seta", |
| 131 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 132 | /*12*/ "setl", "setnl", "setng", "setg" |
| 133 | }; |
| 134 | |
| 135 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 136 | static const char* conditional_move_mnem[] = { |
| 137 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 138 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 139 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 140 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 141 | }; |
| 142 | |
| 143 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 144 | enum InstructionType { |
| 145 | NO_INSTR, |
| 146 | ZERO_OPERANDS_INSTR, |
| 147 | TWO_OPERANDS_INSTR, |
| 148 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 149 | REGISTER_INSTR, |
| 150 | MOVE_REG_INSTR, |
| 151 | CALL_JUMP_INSTR, |
| 152 | SHORT_IMMEDIATE_INSTR |
| 153 | }; |
| 154 | |
| 155 | |
| 156 | struct InstructionDesc { |
| 157 | const char* mnem; |
| 158 | InstructionType type; |
| 159 | OperandOrder op_order_; |
| 160 | }; |
| 161 | |
| 162 | |
| 163 | class InstructionTable { |
| 164 | public: |
| 165 | InstructionTable(); |
| 166 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
| 167 | |
| 168 | private: |
| 169 | InstructionDesc instructions_[256]; |
| 170 | void Clear(); |
| 171 | void Init(); |
| 172 | void CopyTable(ByteMnemonic bm[], InstructionType type); |
| 173 | void SetTableRange(InstructionType type, |
| 174 | byte start, |
| 175 | byte end, |
| 176 | const char* mnem); |
| 177 | void AddJumpConditionalShort(); |
| 178 | }; |
| 179 | |
| 180 | |
| 181 | InstructionTable::InstructionTable() { |
| 182 | Clear(); |
| 183 | Init(); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | void InstructionTable::Clear() { |
| 188 | for (int i = 0; i < 256; i++) { |
| 189 | instructions_[i].mnem = ""; |
| 190 | instructions_[i].type = NO_INSTR; |
| 191 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | |
| 196 | void InstructionTable::Init() { |
| 197 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 198 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 199 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 200 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
| 201 | AddJumpConditionalShort(); |
| 202 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 203 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 204 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 205 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 206 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 207 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 208 | } |
| 209 | |
| 210 | |
| 211 | void InstructionTable::CopyTable(ByteMnemonic bm[], InstructionType type) { |
| 212 | for (int i = 0; bm[i].b >= 0; i++) { |
| 213 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 214 | id->mnem = bm[i].mnem; |
| 215 | id->op_order_ = bm[i].op_order_; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 216 | ASSERT_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 217 | id->type = type; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | |
| 222 | void InstructionTable::SetTableRange(InstructionType type, |
| 223 | byte start, |
| 224 | byte end, |
| 225 | const char* mnem) { |
| 226 | for (byte b = start; b <= end; b++) { |
| 227 | InstructionDesc* id = &instructions_[b]; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 228 | ASSERT_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 229 | id->mnem = mnem; |
| 230 | id->type = type; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | |
| 235 | void InstructionTable::AddJumpConditionalShort() { |
| 236 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 237 | InstructionDesc* id = &instructions_[b]; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 238 | ASSERT_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 239 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 240 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | |
| 245 | static InstructionTable instruction_table; |
| 246 | |
| 247 | |
| 248 | // The IA32 disassembler implementation. |
| 249 | class DisassemblerIA32 { |
| 250 | public: |
| 251 | DisassemblerIA32(const NameConverter& converter, |
| 252 | bool abort_on_unimplemented = true) |
| 253 | : converter_(converter), |
| 254 | tmp_buffer_pos_(0), |
| 255 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 256 | tmp_buffer_[0] = '\0'; |
| 257 | } |
| 258 | |
| 259 | virtual ~DisassemblerIA32() {} |
| 260 | |
| 261 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 262 | // Returns the length of the disassembled machine instruction in bytes. |
| 263 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 264 | |
| 265 | private: |
| 266 | const NameConverter& converter_; |
| 267 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 268 | unsigned int tmp_buffer_pos_; |
| 269 | bool abort_on_unimplemented_; |
| 270 | |
| 271 | |
| 272 | enum { |
| 273 | eax = 0, |
| 274 | ecx = 1, |
| 275 | edx = 2, |
| 276 | ebx = 3, |
| 277 | esp = 4, |
| 278 | ebp = 5, |
| 279 | esi = 6, |
| 280 | edi = 7 |
| 281 | }; |
| 282 | |
| 283 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 284 | enum ShiftOpcodeExtension { |
| 285 | kROL = 0, |
| 286 | kROR = 1, |
| 287 | kRCL = 2, |
| 288 | kRCR = 3, |
| 289 | kSHL = 4, |
| 290 | KSHR = 5, |
| 291 | kSAR = 7 |
| 292 | }; |
| 293 | |
| 294 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 295 | const char* NameOfCPURegister(int reg) const { |
| 296 | return converter_.NameOfCPURegister(reg); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | const char* NameOfByteCPURegister(int reg) const { |
| 301 | return converter_.NameOfByteCPURegister(reg); |
| 302 | } |
| 303 | |
| 304 | |
| 305 | const char* NameOfXMMRegister(int reg) const { |
| 306 | return converter_.NameOfXMMRegister(reg); |
| 307 | } |
| 308 | |
| 309 | |
| 310 | const char* NameOfAddress(byte* addr) const { |
| 311 | return converter_.NameOfAddress(addr); |
| 312 | } |
| 313 | |
| 314 | |
| 315 | // Disassembler helper functions. |
| 316 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 317 | *mod = (data >> 6) & 3; |
| 318 | *regop = (data & 0x38) >> 3; |
| 319 | *rm = data & 7; |
| 320 | } |
| 321 | |
| 322 | |
| 323 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 324 | *scale = (data >> 6) & 3; |
| 325 | *index = (data >> 3) & 7; |
| 326 | *base = data & 7; |
| 327 | } |
| 328 | |
| 329 | typedef const char* (DisassemblerIA32::*RegisterNameMapping)(int reg) const; |
| 330 | |
| 331 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 332 | int PrintRightOperand(byte* modrmp); |
| 333 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 334 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 335 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 336 | int PrintImmediateOp(byte* data); |
| 337 | int F7Instruction(byte* data); |
| 338 | int D1D3C1Instruction(byte* data); |
| 339 | int JumpShort(byte* data); |
| 340 | int JumpConditional(byte* data, const char* comment); |
| 341 | int JumpConditionalShort(byte* data, const char* comment); |
| 342 | int SetCC(byte* data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 343 | int CMov(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 344 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 345 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 346 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 347 | void AppendToBuffer(const char* format, ...); |
| 348 | |
| 349 | |
| 350 | void UnimplementedInstruction() { |
| 351 | if (abort_on_unimplemented_) { |
| 352 | UNIMPLEMENTED(); |
| 353 | } else { |
| 354 | AppendToBuffer("'Unimplemented Instruction'"); |
| 355 | } |
| 356 | } |
| 357 | }; |
| 358 | |
| 359 | |
| 360 | void DisassemblerIA32::AppendToBuffer(const char* format, ...) { |
| 361 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 362 | va_list args; |
| 363 | va_start(args, format); |
| 364 | int result = v8::internal::OS::VSNPrintF(buf, format, args); |
| 365 | va_end(args); |
| 366 | tmp_buffer_pos_ += result; |
| 367 | } |
| 368 | |
| 369 | int DisassemblerIA32::PrintRightOperandHelper( |
| 370 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 371 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 372 | int mod, regop, rm; |
| 373 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 374 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 375 | &DisassemblerIA32::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 376 | switch (mod) { |
| 377 | case 0: |
| 378 | if (rm == ebp) { |
| 379 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 380 | AppendToBuffer("[0x%x]", disp); |
| 381 | return 5; |
| 382 | } else if (rm == esp) { |
| 383 | byte sib = *(modrmp + 1); |
| 384 | int scale, index, base; |
| 385 | get_sib(sib, &scale, &index, &base); |
| 386 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 387 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 388 | return 2; |
| 389 | } else if (base == ebp) { |
| 390 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
| 391 | AppendToBuffer("[%s*%d+0x%x]", |
| 392 | (this->*register_name)(index), |
| 393 | 1 << scale, |
| 394 | disp); |
| 395 | return 6; |
| 396 | } else if (index != esp && base != ebp) { |
| 397 | // [base+index*scale] |
| 398 | AppendToBuffer("[%s+%s*%d]", |
| 399 | (this->*register_name)(base), |
| 400 | (this->*register_name)(index), |
| 401 | 1 << scale); |
| 402 | return 2; |
| 403 | } else { |
| 404 | UnimplementedInstruction(); |
| 405 | return 1; |
| 406 | } |
| 407 | } else { |
| 408 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 409 | return 1; |
| 410 | } |
| 411 | break; |
| 412 | case 1: // fall through |
| 413 | case 2: |
| 414 | if (rm == esp) { |
| 415 | byte sib = *(modrmp + 1); |
| 416 | int scale, index, base; |
| 417 | get_sib(sib, &scale, &index, &base); |
| 418 | int disp = |
| 419 | mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) : *(modrmp + 2); |
| 420 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
| 421 | AppendToBuffer("[%s+0x%x]", (this->*register_name)(rm), disp); |
| 422 | } else { |
| 423 | AppendToBuffer("[%s+%s*%d+0x%x]", |
| 424 | (this->*register_name)(base), |
| 425 | (this->*register_name)(index), |
| 426 | 1 << scale, |
| 427 | disp); |
| 428 | } |
| 429 | return mod == 2 ? 6 : 3; |
| 430 | } else { |
| 431 | // No sib. |
| 432 | int disp = |
| 433 | mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) : *(modrmp + 1); |
| 434 | AppendToBuffer("[%s+0x%x]", (this->*register_name)(rm), disp); |
| 435 | return mod == 2 ? 5 : 2; |
| 436 | } |
| 437 | break; |
| 438 | case 3: |
| 439 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 440 | return 1; |
| 441 | default: |
| 442 | UnimplementedInstruction(); |
| 443 | return 1; |
| 444 | } |
| 445 | UNREACHABLE(); |
| 446 | } |
| 447 | |
| 448 | |
| 449 | int DisassemblerIA32::PrintRightOperand(byte* modrmp) { |
| 450 | return PrintRightOperandHelper(modrmp, &DisassemblerIA32::NameOfCPURegister); |
| 451 | } |
| 452 | |
| 453 | |
| 454 | int DisassemblerIA32::PrintRightByteOperand(byte* modrmp) { |
| 455 | return PrintRightOperandHelper(modrmp, |
| 456 | &DisassemblerIA32::NameOfByteCPURegister); |
| 457 | } |
| 458 | |
| 459 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 460 | int DisassemblerIA32::PrintRightXMMOperand(byte* modrmp) { |
| 461 | return PrintRightOperandHelper(modrmp, |
| 462 | &DisassemblerIA32::NameOfXMMRegister); |
| 463 | } |
| 464 | |
| 465 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 466 | // Returns number of bytes used including the current *data. |
| 467 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 468 | int DisassemblerIA32::PrintOperands(const char* mnem, |
| 469 | OperandOrder op_order, |
| 470 | byte* data) { |
| 471 | byte modrm = *data; |
| 472 | int mod, regop, rm; |
| 473 | get_modrm(modrm, &mod, ®op, &rm); |
| 474 | int advance = 0; |
| 475 | switch (op_order) { |
| 476 | case REG_OPER_OP_ORDER: { |
| 477 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 478 | advance = PrintRightOperand(data); |
| 479 | break; |
| 480 | } |
| 481 | case OPER_REG_OP_ORDER: { |
| 482 | AppendToBuffer("%s ", mnem); |
| 483 | advance = PrintRightOperand(data); |
| 484 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 485 | break; |
| 486 | } |
| 487 | default: |
| 488 | UNREACHABLE(); |
| 489 | break; |
| 490 | } |
| 491 | return advance; |
| 492 | } |
| 493 | |
| 494 | |
| 495 | // Returns number of bytes used by machine instruction, including *data byte. |
| 496 | // Writes immediate instructions to 'tmp_buffer_'. |
| 497 | int DisassemblerIA32::PrintImmediateOp(byte* data) { |
| 498 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 499 | byte modrm = *(data+1); |
| 500 | int mod, regop, rm; |
| 501 | get_modrm(modrm, &mod, ®op, &rm); |
| 502 | const char* mnem = "Imm???"; |
| 503 | switch (regop) { |
| 504 | case 0: mnem = "add"; break; |
| 505 | case 1: mnem = "or"; break; |
| 506 | case 2: mnem = "adc"; break; |
| 507 | case 4: mnem = "and"; break; |
| 508 | case 5: mnem = "sub"; break; |
| 509 | case 6: mnem = "xor"; break; |
| 510 | case 7: mnem = "cmp"; break; |
| 511 | default: UnimplementedInstruction(); |
| 512 | } |
| 513 | AppendToBuffer("%s ", mnem); |
| 514 | int count = PrintRightOperand(data+1); |
| 515 | if (sign_extension_bit) { |
| 516 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 517 | return 1 + count + 1 /*int8*/; |
| 518 | } else { |
| 519 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 520 | return 1 + count + 4 /*int32_t*/; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | // Returns number of bytes used, including *data. |
| 526 | int DisassemblerIA32::F7Instruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 527 | ASSERT_EQ(0xF7, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 528 | byte modrm = *(data+1); |
| 529 | int mod, regop, rm; |
| 530 | get_modrm(modrm, &mod, ®op, &rm); |
| 531 | if (mod == 3 && regop != 0) { |
| 532 | const char* mnem = NULL; |
| 533 | switch (regop) { |
| 534 | case 2: mnem = "not"; break; |
| 535 | case 3: mnem = "neg"; break; |
| 536 | case 4: mnem = "mul"; break; |
| 537 | case 7: mnem = "idiv"; break; |
| 538 | default: UnimplementedInstruction(); |
| 539 | } |
| 540 | AppendToBuffer("%s %s", mnem, NameOfCPURegister(rm)); |
| 541 | return 2; |
| 542 | } else if (mod == 3 && regop == eax) { |
| 543 | int32_t imm = *reinterpret_cast<int32_t*>(data+2); |
| 544 | AppendToBuffer("test %s,0x%x", NameOfCPURegister(rm), imm); |
| 545 | return 6; |
| 546 | } else if (regop == eax) { |
| 547 | AppendToBuffer("test "); |
| 548 | int count = PrintRightOperand(data+1); |
| 549 | int32_t imm = *reinterpret_cast<int32_t*>(data+1+count); |
| 550 | AppendToBuffer(",0x%x", imm); |
| 551 | return 1+count+4 /*int32_t*/; |
| 552 | } else { |
| 553 | UnimplementedInstruction(); |
| 554 | return 2; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | int DisassemblerIA32::D1D3C1Instruction(byte* data) { |
| 559 | byte op = *data; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 560 | ASSERT(op == 0xD1 || op == 0xD3 || op == 0xC1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 561 | byte modrm = *(data+1); |
| 562 | int mod, regop, rm; |
| 563 | get_modrm(modrm, &mod, ®op, &rm); |
| 564 | int imm8 = -1; |
| 565 | int num_bytes = 2; |
| 566 | if (mod == 3) { |
| 567 | const char* mnem = NULL; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 568 | switch (regop) { |
| 569 | case kROL: mnem = "rol"; break; |
| 570 | case kROR: mnem = "ror"; break; |
| 571 | case kRCL: mnem = "rcl"; break; |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 572 | case kRCR: mnem = "rcr"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 573 | case kSHL: mnem = "shl"; break; |
| 574 | case KSHR: mnem = "shr"; break; |
| 575 | case kSAR: mnem = "sar"; break; |
| 576 | default: UnimplementedInstruction(); |
| 577 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 578 | if (op == 0xD1) { |
| 579 | imm8 = 1; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 580 | } else if (op == 0xC1) { |
| 581 | imm8 = *(data+2); |
| 582 | num_bytes = 3; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 583 | } else if (op == 0xD3) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 584 | // Shift/rotate by cl. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 585 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 586 | ASSERT_NE(NULL, mnem); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 587 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(rm)); |
| 588 | if (imm8 > 0) { |
| 589 | AppendToBuffer("%d", imm8); |
| 590 | } else { |
| 591 | AppendToBuffer("cl"); |
| 592 | } |
| 593 | } else { |
| 594 | UnimplementedInstruction(); |
| 595 | } |
| 596 | return num_bytes; |
| 597 | } |
| 598 | |
| 599 | |
| 600 | // Returns number of bytes used, including *data. |
| 601 | int DisassemblerIA32::JumpShort(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 602 | ASSERT_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 603 | byte b = *(data+1); |
| 604 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 605 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 606 | return 2; |
| 607 | } |
| 608 | |
| 609 | |
| 610 | // Returns number of bytes used, including *data. |
| 611 | int DisassemblerIA32::JumpConditional(byte* data, const char* comment) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 612 | ASSERT_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 613 | byte cond = *(data+1) & 0x0F; |
| 614 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 615 | const char* mnem = jump_conditional_mnem[cond]; |
| 616 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 617 | if (comment != NULL) { |
| 618 | AppendToBuffer(", %s", comment); |
| 619 | } |
| 620 | return 6; // includes 0x0F |
| 621 | } |
| 622 | |
| 623 | |
| 624 | // Returns number of bytes used, including *data. |
| 625 | int DisassemblerIA32::JumpConditionalShort(byte* data, const char* comment) { |
| 626 | byte cond = *data & 0x0F; |
| 627 | byte b = *(data+1); |
| 628 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 629 | const char* mnem = jump_conditional_mnem[cond]; |
| 630 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 631 | if (comment != NULL) { |
| 632 | AppendToBuffer(", %s", comment); |
| 633 | } |
| 634 | return 2; |
| 635 | } |
| 636 | |
| 637 | |
| 638 | // Returns number of bytes used, including *data. |
| 639 | int DisassemblerIA32::SetCC(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 640 | ASSERT_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 641 | byte cond = *(data+1) & 0x0F; |
| 642 | const char* mnem = set_conditional_mnem[cond]; |
| 643 | AppendToBuffer("%s ", mnem); |
| 644 | PrintRightByteOperand(data+2); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 645 | return 3; // Includes 0x0F. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | |
| 649 | // Returns number of bytes used, including *data. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 650 | int DisassemblerIA32::CMov(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 651 | ASSERT_EQ(0x0F, *data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 652 | byte cond = *(data + 1) & 0x0F; |
| 653 | const char* mnem = conditional_move_mnem[cond]; |
| 654 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 655 | return 2 + op_size; // includes 0x0F |
| 656 | } |
| 657 | |
| 658 | |
| 659 | // Returns number of bytes used, including *data. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 660 | int DisassemblerIA32::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 661 | byte escape_opcode = *data; |
| 662 | ASSERT_EQ(0xD8, escape_opcode & 0xF8); |
| 663 | byte modrm_byte = *(data+1); |
| 664 | |
| 665 | if (modrm_byte >= 0xC0) { |
| 666 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 667 | } else { |
| 668 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 669 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode, |
| 673 | int modrm_byte, |
| 674 | byte* modrm_start) { |
| 675 | const char* mnem = "?"; |
| 676 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 677 | switch (escape_opcode) { |
| 678 | case 0xD9: switch (regop) { |
| 679 | case 0: mnem = "fld_s"; break; |
| 680 | case 3: mnem = "fstp_s"; break; |
| 681 | case 7: mnem = "fstcw"; break; |
| 682 | default: UnimplementedInstruction(); |
| 683 | } |
| 684 | break; |
| 685 | |
| 686 | case 0xDB: switch (regop) { |
| 687 | case 0: mnem = "fild_s"; break; |
| 688 | case 1: mnem = "fisttp_s"; break; |
| 689 | case 2: mnem = "fist_s"; break; |
| 690 | case 3: mnem = "fistp_s"; break; |
| 691 | default: UnimplementedInstruction(); |
| 692 | } |
| 693 | break; |
| 694 | |
| 695 | case 0xDD: switch (regop) { |
| 696 | case 0: mnem = "fld_d"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 697 | case 1: mnem = "fisttp_d"; break; |
| 698 | case 2: mnem = "fst_d"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 699 | case 3: mnem = "fstp_d"; break; |
| 700 | default: UnimplementedInstruction(); |
| 701 | } |
| 702 | break; |
| 703 | |
| 704 | case 0xDF: switch (regop) { |
| 705 | case 5: mnem = "fild_d"; break; |
| 706 | case 7: mnem = "fistp_d"; break; |
| 707 | default: UnimplementedInstruction(); |
| 708 | } |
| 709 | break; |
| 710 | |
| 711 | default: UnimplementedInstruction(); |
| 712 | } |
| 713 | AppendToBuffer("%s ", mnem); |
| 714 | int count = PrintRightOperand(modrm_start); |
| 715 | return count + 1; |
| 716 | } |
| 717 | |
| 718 | int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode, |
| 719 | byte modrm_byte) { |
| 720 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 721 | const char* mnem = "?"; |
| 722 | |
| 723 | switch (escape_opcode) { |
| 724 | case 0xD8: |
| 725 | UnimplementedInstruction(); |
| 726 | break; |
| 727 | |
| 728 | case 0xD9: |
| 729 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 730 | case 0xC0: |
| 731 | mnem = "fld"; |
| 732 | has_register = true; |
| 733 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 734 | case 0xC8: |
| 735 | mnem = "fxch"; |
| 736 | has_register = true; |
| 737 | break; |
| 738 | default: |
| 739 | switch (modrm_byte) { |
| 740 | case 0xE0: mnem = "fchs"; break; |
| 741 | case 0xE1: mnem = "fabs"; break; |
| 742 | case 0xE4: mnem = "ftst"; break; |
| 743 | case 0xE8: mnem = "fld1"; break; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 744 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 745 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 746 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 747 | case 0xF1: mnem = "fyl2x"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 748 | case 0xF5: mnem = "fprem1"; break; |
| 749 | case 0xF7: mnem = "fincstp"; break; |
| 750 | case 0xF8: mnem = "fprem"; break; |
| 751 | case 0xFE: mnem = "fsin"; break; |
| 752 | case 0xFF: mnem = "fcos"; break; |
| 753 | default: UnimplementedInstruction(); |
| 754 | } |
| 755 | } |
| 756 | break; |
| 757 | |
| 758 | case 0xDA: |
| 759 | if (modrm_byte == 0xE9) { |
| 760 | mnem = "fucompp"; |
| 761 | } else { |
| 762 | UnimplementedInstruction(); |
| 763 | } |
| 764 | break; |
| 765 | |
| 766 | case 0xDB: |
| 767 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 768 | mnem = "fucomi"; |
| 769 | has_register = true; |
| 770 | } else if (modrm_byte == 0xE2) { |
| 771 | mnem = "fclex"; |
| 772 | } else { |
| 773 | UnimplementedInstruction(); |
| 774 | } |
| 775 | break; |
| 776 | |
| 777 | case 0xDC: |
| 778 | has_register = true; |
| 779 | switch (modrm_byte & 0xF8) { |
| 780 | case 0xC0: mnem = "fadd"; break; |
| 781 | case 0xE8: mnem = "fsub"; break; |
| 782 | case 0xC8: mnem = "fmul"; break; |
| 783 | case 0xF8: mnem = "fdiv"; break; |
| 784 | default: UnimplementedInstruction(); |
| 785 | } |
| 786 | break; |
| 787 | |
| 788 | case 0xDD: |
| 789 | has_register = true; |
| 790 | switch (modrm_byte & 0xF8) { |
| 791 | case 0xC0: mnem = "ffree"; break; |
| 792 | case 0xD8: mnem = "fstp"; break; |
| 793 | default: UnimplementedInstruction(); |
| 794 | } |
| 795 | break; |
| 796 | |
| 797 | case 0xDE: |
| 798 | if (modrm_byte == 0xD9) { |
| 799 | mnem = "fcompp"; |
| 800 | } else { |
| 801 | has_register = true; |
| 802 | switch (modrm_byte & 0xF8) { |
| 803 | case 0xC0: mnem = "faddp"; break; |
| 804 | case 0xE8: mnem = "fsubp"; break; |
| 805 | case 0xC8: mnem = "fmulp"; break; |
| 806 | case 0xF8: mnem = "fdivp"; break; |
| 807 | default: UnimplementedInstruction(); |
| 808 | } |
| 809 | } |
| 810 | break; |
| 811 | |
| 812 | case 0xDF: |
| 813 | if (modrm_byte == 0xE0) { |
| 814 | mnem = "fnstsw_ax"; |
| 815 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 816 | mnem = "fucomip"; |
| 817 | has_register = true; |
| 818 | } |
| 819 | break; |
| 820 | |
| 821 | default: UnimplementedInstruction(); |
| 822 | } |
| 823 | |
| 824 | if (has_register) { |
| 825 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 826 | } else { |
| 827 | AppendToBuffer("%s", mnem); |
| 828 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 829 | return 2; |
| 830 | } |
| 831 | |
| 832 | |
| 833 | // Mnemonics for instructions 0xF0 byte. |
| 834 | // Returns NULL if the instruction is not handled here. |
| 835 | static const char* F0Mnem(byte f0byte) { |
| 836 | switch (f0byte) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 837 | case 0x18: return "prefetch"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 838 | case 0xA2: return "cpuid"; |
| 839 | case 0x31: return "rdtsc"; |
| 840 | case 0xBE: return "movsx_b"; |
| 841 | case 0xBF: return "movsx_w"; |
| 842 | case 0xB6: return "movzx_b"; |
| 843 | case 0xB7: return "movzx_w"; |
| 844 | case 0xAF: return "imul"; |
| 845 | case 0xA5: return "shld"; |
| 846 | case 0xAD: return "shrd"; |
| 847 | case 0xAB: return "bts"; |
| 848 | default: return NULL; |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | |
| 853 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 854 | int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 855 | byte* instr) { |
| 856 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 857 | byte* data = instr; |
| 858 | // Check for hints. |
| 859 | const char* branch_hint = NULL; |
| 860 | // We use these two prefixes only with branch prediction |
| 861 | if (*data == 0x3E /*ds*/) { |
| 862 | branch_hint = "predicted taken"; |
| 863 | data++; |
| 864 | } else if (*data == 0x2E /*cs*/) { |
| 865 | branch_hint = "predicted not taken"; |
| 866 | data++; |
| 867 | } |
| 868 | bool processed = true; // Will be set to false if the current instruction |
| 869 | // is not in 'instructions' table. |
| 870 | const InstructionDesc& idesc = instruction_table.Get(*data); |
| 871 | switch (idesc.type) { |
| 872 | case ZERO_OPERANDS_INSTR: |
| 873 | AppendToBuffer(idesc.mnem); |
| 874 | data++; |
| 875 | break; |
| 876 | |
| 877 | case TWO_OPERANDS_INSTR: |
| 878 | data++; |
| 879 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 880 | break; |
| 881 | |
| 882 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 883 | data += JumpConditionalShort(data, branch_hint); |
| 884 | break; |
| 885 | |
| 886 | case REGISTER_INSTR: |
| 887 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 888 | data++; |
| 889 | break; |
| 890 | |
| 891 | case MOVE_REG_INSTR: { |
| 892 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 893 | AppendToBuffer("mov %s,%s", |
| 894 | NameOfCPURegister(*data & 0x07), |
| 895 | NameOfAddress(addr)); |
| 896 | data += 5; |
| 897 | break; |
| 898 | } |
| 899 | |
| 900 | case CALL_JUMP_INSTR: { |
| 901 | byte* addr = data + *reinterpret_cast<int32_t*>(data+1) + 5; |
| 902 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 903 | data += 5; |
| 904 | break; |
| 905 | } |
| 906 | |
| 907 | case SHORT_IMMEDIATE_INSTR: { |
| 908 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 909 | AppendToBuffer("%s eax, %s", idesc.mnem, NameOfAddress(addr)); |
| 910 | data += 5; |
| 911 | break; |
| 912 | } |
| 913 | |
| 914 | case NO_INSTR: |
| 915 | processed = false; |
| 916 | break; |
| 917 | |
| 918 | default: |
| 919 | UNIMPLEMENTED(); // This type is not implemented. |
| 920 | } |
| 921 | //---------------------------- |
| 922 | if (!processed) { |
| 923 | switch (*data) { |
| 924 | case 0xC2: |
| 925 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 926 | data += 3; |
| 927 | break; |
| 928 | |
| 929 | case 0x69: // fall through |
| 930 | case 0x6B: |
| 931 | { int mod, regop, rm; |
| 932 | get_modrm(*(data+1), &mod, ®op, &rm); |
| 933 | int32_t imm = |
| 934 | *data == 0x6B ? *(data+2) : *reinterpret_cast<int32_t*>(data+2); |
| 935 | AppendToBuffer("imul %s,%s,0x%x", |
| 936 | NameOfCPURegister(regop), |
| 937 | NameOfCPURegister(rm), |
| 938 | imm); |
| 939 | data += 2 + (*data == 0x6B ? 1 : 4); |
| 940 | } |
| 941 | break; |
| 942 | |
| 943 | case 0xF6: |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 944 | { data++; |
| 945 | int mod, regop, rm; |
| 946 | get_modrm(*data, &mod, ®op, &rm); |
| 947 | if (regop == eax) { |
| 948 | AppendToBuffer("test_b "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 949 | data += PrintRightByteOperand(data); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 950 | int32_t imm = *data; |
| 951 | AppendToBuffer(",0x%x", imm); |
| 952 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 953 | } else { |
| 954 | UnimplementedInstruction(); |
| 955 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 956 | } |
| 957 | break; |
| 958 | |
| 959 | case 0x81: // fall through |
| 960 | case 0x83: // 0x81 with sign extension bit set |
| 961 | data += PrintImmediateOp(data); |
| 962 | break; |
| 963 | |
| 964 | case 0x0F: |
| 965 | { byte f0byte = *(data+1); |
| 966 | const char* f0mnem = F0Mnem(f0byte); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 967 | if (f0byte == 0x18) { |
| 968 | int mod, regop, rm; |
| 969 | get_modrm(*data, &mod, ®op, &rm); |
| 970 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 971 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 972 | data += PrintRightOperand(data); |
| 973 | } else if (f0byte == 0xA2 || f0byte == 0x31) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 974 | AppendToBuffer("%s", f0mnem); |
| 975 | data += 2; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 976 | } else if (f0byte == 0x28) { |
| 977 | data += 2; |
| 978 | int mod, regop, rm; |
| 979 | get_modrm(*data, &mod, ®op, &rm); |
| 980 | AppendToBuffer("movaps %s,%s", |
| 981 | NameOfXMMRegister(regop), |
| 982 | NameOfXMMRegister(rm)); |
| 983 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 984 | } else if ((f0byte & 0xF0) == 0x80) { |
| 985 | data += JumpConditional(data, branch_hint); |
| 986 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 987 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 988 | data += 2; |
| 989 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 990 | } else if ((f0byte & 0xF0) == 0x90) { |
| 991 | data += SetCC(data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 992 | } else if ((f0byte & 0xF0) == 0x40) { |
| 993 | data += CMov(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 994 | } else { |
| 995 | data += 2; |
| 996 | if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
| 997 | // shrd, shld, bts |
| 998 | AppendToBuffer("%s ", f0mnem); |
| 999 | int mod, regop, rm; |
| 1000 | get_modrm(*data, &mod, ®op, &rm); |
| 1001 | data += PrintRightOperand(data); |
| 1002 | if (f0byte == 0xAB) { |
| 1003 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1004 | } else { |
| 1005 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
| 1006 | } |
| 1007 | } else { |
| 1008 | UnimplementedInstruction(); |
| 1009 | } |
| 1010 | } |
| 1011 | } |
| 1012 | break; |
| 1013 | |
| 1014 | case 0x8F: |
| 1015 | { data++; |
| 1016 | int mod, regop, rm; |
| 1017 | get_modrm(*data, &mod, ®op, &rm); |
| 1018 | if (regop == eax) { |
| 1019 | AppendToBuffer("pop "); |
| 1020 | data += PrintRightOperand(data); |
| 1021 | } |
| 1022 | } |
| 1023 | break; |
| 1024 | |
| 1025 | case 0xFF: |
| 1026 | { data++; |
| 1027 | int mod, regop, rm; |
| 1028 | get_modrm(*data, &mod, ®op, &rm); |
| 1029 | const char* mnem = NULL; |
| 1030 | switch (regop) { |
| 1031 | case esi: mnem = "push"; break; |
| 1032 | case eax: mnem = "inc"; break; |
| 1033 | case ecx: mnem = "dec"; break; |
| 1034 | case edx: mnem = "call"; break; |
| 1035 | case esp: mnem = "jmp"; break; |
| 1036 | default: mnem = "???"; |
| 1037 | } |
| 1038 | AppendToBuffer("%s ", mnem); |
| 1039 | data += PrintRightOperand(data); |
| 1040 | } |
| 1041 | break; |
| 1042 | |
| 1043 | case 0xC7: // imm32, fall through |
| 1044 | case 0xC6: // imm8 |
| 1045 | { bool is_byte = *data == 0xC6; |
| 1046 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1047 | if (is_byte) { |
| 1048 | AppendToBuffer("%s ", "mov_b"); |
| 1049 | data += PrintRightByteOperand(data); |
| 1050 | int32_t imm = *data; |
| 1051 | AppendToBuffer(",0x%x", imm); |
| 1052 | data++; |
| 1053 | } else { |
| 1054 | AppendToBuffer("%s ", "mov"); |
| 1055 | data += PrintRightOperand(data); |
| 1056 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1057 | AppendToBuffer(",0x%x", imm); |
| 1058 | data += 4; |
| 1059 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1060 | } |
| 1061 | break; |
| 1062 | |
| 1063 | case 0x80: |
| 1064 | { data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1065 | int mod, regop, rm; |
| 1066 | get_modrm(*data, &mod, ®op, &rm); |
| 1067 | const char* mnem = NULL; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1068 | switch (regop) { |
| 1069 | case 5: mnem = "subb"; break; |
| 1070 | case 7: mnem = "cmpb"; break; |
| 1071 | default: UnimplementedInstruction(); |
| 1072 | } |
| 1073 | AppendToBuffer("%s ", mnem); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1074 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1075 | int32_t imm = *data; |
| 1076 | AppendToBuffer(",0x%x", imm); |
| 1077 | data++; |
| 1078 | } |
| 1079 | break; |
| 1080 | |
| 1081 | case 0x88: // 8bit, fall through |
| 1082 | case 0x89: // 32bit |
| 1083 | { bool is_byte = *data == 0x88; |
| 1084 | int mod, regop, rm; |
| 1085 | data++; |
| 1086 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1087 | if (is_byte) { |
| 1088 | AppendToBuffer("%s ", "mov_b"); |
| 1089 | data += PrintRightByteOperand(data); |
| 1090 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1091 | } else { |
| 1092 | AppendToBuffer("%s ", "mov"); |
| 1093 | data += PrintRightOperand(data); |
| 1094 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1095 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1096 | } |
| 1097 | break; |
| 1098 | |
| 1099 | case 0x66: // prefix |
| 1100 | data++; |
| 1101 | if (*data == 0x8B) { |
| 1102 | data++; |
| 1103 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
| 1104 | } else if (*data == 0x89) { |
| 1105 | data++; |
| 1106 | int mod, regop, rm; |
| 1107 | get_modrm(*data, &mod, ®op, &rm); |
| 1108 | AppendToBuffer("mov_w "); |
| 1109 | data += PrintRightOperand(data); |
| 1110 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1111 | } else if (*data == 0x0F) { |
| 1112 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1113 | if (*data == 0x38) { |
| 1114 | data++; |
| 1115 | if (*data == 0x17) { |
| 1116 | data++; |
| 1117 | int mod, regop, rm; |
| 1118 | get_modrm(*data, &mod, ®op, &rm); |
| 1119 | AppendToBuffer("ptest %s,%s", |
| 1120 | NameOfXMMRegister(regop), |
| 1121 | NameOfXMMRegister(rm)); |
| 1122 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1123 | } else if (*data == 0x2A) { |
| 1124 | // movntdqa |
| 1125 | data++; |
| 1126 | int mod, regop, rm; |
| 1127 | get_modrm(*data, &mod, ®op, &rm); |
| 1128 | AppendToBuffer("movntdqa %s,", NameOfXMMRegister(regop)); |
| 1129 | data += PrintRightOperand(data); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1130 | } else { |
| 1131 | UnimplementedInstruction(); |
| 1132 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1133 | } else if (*data == 0x3A) { |
| 1134 | data++; |
| 1135 | if (*data == 0x16) { |
| 1136 | data++; |
| 1137 | int mod, regop, rm; |
| 1138 | get_modrm(*data, &mod, ®op, &rm); |
| 1139 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1140 | AppendToBuffer("pextrd %s,%s,%d", |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1141 | NameOfCPURegister(regop), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1142 | NameOfXMMRegister(rm), |
| 1143 | static_cast<int>(imm8)); |
| 1144 | data += 2; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1145 | } else if (*data == 0x22) { |
| 1146 | data++; |
| 1147 | int mod, regop, rm; |
| 1148 | get_modrm(*data, &mod, ®op, &rm); |
| 1149 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1150 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1151 | NameOfXMMRegister(regop), |
| 1152 | NameOfCPURegister(rm), |
| 1153 | static_cast<int>(imm8)); |
| 1154 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1155 | } else { |
| 1156 | UnimplementedInstruction(); |
| 1157 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1158 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1159 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1160 | data++; |
| 1161 | int mod, regop, rm; |
| 1162 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1163 | if (mod == 0x3) { |
| 1164 | AppendToBuffer("%s %s,%s", mnem, |
| 1165 | NameOfXMMRegister(regop), |
| 1166 | NameOfXMMRegister(rm)); |
| 1167 | data++; |
| 1168 | } else { |
| 1169 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1170 | data += PrintRightOperand(data); |
| 1171 | } |
| 1172 | } else if (*data == 0x50) { |
| 1173 | data++; |
| 1174 | int mod, regop, rm; |
| 1175 | get_modrm(*data, &mod, ®op, &rm); |
| 1176 | AppendToBuffer("movmskpd %s,%s", |
| 1177 | NameOfCPURegister(regop), |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1178 | NameOfXMMRegister(rm)); |
| 1179 | data++; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1180 | } else if (*data == 0x54) { |
| 1181 | data++; |
| 1182 | int mod, regop, rm; |
| 1183 | get_modrm(*data, &mod, ®op, &rm); |
| 1184 | AppendToBuffer("andpd %s,%s", |
| 1185 | NameOfXMMRegister(regop), |
| 1186 | NameOfXMMRegister(rm)); |
| 1187 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1188 | } else if (*data == 0x57) { |
| 1189 | data++; |
| 1190 | int mod, regop, rm; |
| 1191 | get_modrm(*data, &mod, ®op, &rm); |
| 1192 | AppendToBuffer("xorpd %s,%s", |
| 1193 | NameOfXMMRegister(regop), |
| 1194 | NameOfXMMRegister(rm)); |
| 1195 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1196 | } else if (*data == 0x6E) { |
| 1197 | data++; |
| 1198 | int mod, regop, rm; |
| 1199 | get_modrm(*data, &mod, ®op, &rm); |
| 1200 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1201 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1202 | } else if (*data == 0x6F) { |
| 1203 | data++; |
| 1204 | int mod, regop, rm; |
| 1205 | get_modrm(*data, &mod, ®op, &rm); |
| 1206 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1207 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1208 | } else if (*data == 0x70) { |
| 1209 | data++; |
| 1210 | int mod, regop, rm; |
| 1211 | get_modrm(*data, &mod, ®op, &rm); |
| 1212 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1213 | AppendToBuffer("pshufd %s,%s,%d", |
| 1214 | NameOfXMMRegister(regop), |
| 1215 | NameOfXMMRegister(rm), |
| 1216 | static_cast<int>(imm8)); |
| 1217 | data += 2; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1218 | } else if (*data == 0xF3) { |
| 1219 | data++; |
| 1220 | int mod, regop, rm; |
| 1221 | get_modrm(*data, &mod, ®op, &rm); |
| 1222 | AppendToBuffer("psllq %s,%s", |
| 1223 | NameOfXMMRegister(regop), |
| 1224 | NameOfXMMRegister(rm)); |
| 1225 | data++; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1226 | } else if (*data == 0x73) { |
| 1227 | data++; |
| 1228 | int mod, regop, rm; |
| 1229 | get_modrm(*data, &mod, ®op, &rm); |
| 1230 | int8_t imm8 = static_cast<int8_t>(data[1]); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1231 | ASSERT(regop == esi || regop == edx); |
| 1232 | AppendToBuffer("%s %s,%d", |
| 1233 | (regop == esi) ? "psllq" : "psrlq", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1234 | NameOfXMMRegister(rm), |
| 1235 | static_cast<int>(imm8)); |
| 1236 | data += 2; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1237 | } else if (*data == 0xD3) { |
| 1238 | data++; |
| 1239 | int mod, regop, rm; |
| 1240 | get_modrm(*data, &mod, ®op, &rm); |
| 1241 | AppendToBuffer("psrlq %s,%s", |
| 1242 | NameOfXMMRegister(regop), |
| 1243 | NameOfXMMRegister(rm)); |
| 1244 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1245 | } else if (*data == 0x7F) { |
| 1246 | AppendToBuffer("movdqa "); |
| 1247 | data++; |
| 1248 | int mod, regop, rm; |
| 1249 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1250 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1251 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1252 | } else if (*data == 0x7E) { |
| 1253 | data++; |
| 1254 | int mod, regop, rm; |
| 1255 | get_modrm(*data, &mod, ®op, &rm); |
| 1256 | AppendToBuffer("movd "); |
| 1257 | data += PrintRightOperand(data); |
| 1258 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1259 | } else if (*data == 0xDB) { |
| 1260 | data++; |
| 1261 | int mod, regop, rm; |
| 1262 | get_modrm(*data, &mod, ®op, &rm); |
| 1263 | AppendToBuffer("pand %s,%s", |
| 1264 | NameOfXMMRegister(regop), |
| 1265 | NameOfXMMRegister(rm)); |
| 1266 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1267 | } else if (*data == 0xE7) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1268 | data++; |
| 1269 | int mod, regop, rm; |
| 1270 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1271 | if (mod == 3) { |
| 1272 | AppendToBuffer("movntdq "); |
| 1273 | data += PrintRightOperand(data); |
| 1274 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1275 | } else { |
| 1276 | UnimplementedInstruction(); |
| 1277 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1278 | } else if (*data == 0xEF) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1279 | data++; |
| 1280 | int mod, regop, rm; |
| 1281 | get_modrm(*data, &mod, ®op, &rm); |
| 1282 | AppendToBuffer("pxor %s,%s", |
| 1283 | NameOfXMMRegister(regop), |
| 1284 | NameOfXMMRegister(rm)); |
| 1285 | data++; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1286 | } else if (*data == 0xEB) { |
| 1287 | data++; |
| 1288 | int mod, regop, rm; |
| 1289 | get_modrm(*data, &mod, ®op, &rm); |
| 1290 | AppendToBuffer("por %s,%s", |
| 1291 | NameOfXMMRegister(regop), |
| 1292 | NameOfXMMRegister(rm)); |
| 1293 | data++; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1294 | } else { |
| 1295 | UnimplementedInstruction(); |
| 1296 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1297 | } else { |
| 1298 | UnimplementedInstruction(); |
| 1299 | } |
| 1300 | break; |
| 1301 | |
| 1302 | case 0xFE: |
| 1303 | { data++; |
| 1304 | int mod, regop, rm; |
| 1305 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1306 | if (regop == ecx) { |
| 1307 | AppendToBuffer("dec_b "); |
| 1308 | data += PrintRightOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1309 | } else { |
| 1310 | UnimplementedInstruction(); |
| 1311 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1312 | } |
| 1313 | break; |
| 1314 | |
| 1315 | case 0x68: |
| 1316 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1317 | data += 5; |
| 1318 | break; |
| 1319 | |
| 1320 | case 0x6A: |
| 1321 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1322 | data += 2; |
| 1323 | break; |
| 1324 | |
| 1325 | case 0xA8: |
| 1326 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1327 | data += 2; |
| 1328 | break; |
| 1329 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1330 | case 0x2C: |
| 1331 | AppendToBuffer("subb eax,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1332 | data += 2; |
| 1333 | break; |
| 1334 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1335 | case 0xA9: |
| 1336 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1337 | data += 5; |
| 1338 | break; |
| 1339 | |
| 1340 | case 0xD1: // fall through |
| 1341 | case 0xD3: // fall through |
| 1342 | case 0xC1: |
| 1343 | data += D1D3C1Instruction(data); |
| 1344 | break; |
| 1345 | |
| 1346 | case 0xD9: // fall through |
| 1347 | case 0xDA: // fall through |
| 1348 | case 0xDB: // fall through |
| 1349 | case 0xDC: // fall through |
| 1350 | case 0xDD: // fall through |
| 1351 | case 0xDE: // fall through |
| 1352 | case 0xDF: |
| 1353 | data += FPUInstruction(data); |
| 1354 | break; |
| 1355 | |
| 1356 | case 0xEB: |
| 1357 | data += JumpShort(data); |
| 1358 | break; |
| 1359 | |
| 1360 | case 0xF2: |
| 1361 | if (*(data+1) == 0x0F) { |
| 1362 | byte b2 = *(data+2); |
| 1363 | if (b2 == 0x11) { |
| 1364 | AppendToBuffer("movsd "); |
| 1365 | data += 3; |
| 1366 | int mod, regop, rm; |
| 1367 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1368 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1369 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1370 | } else if (b2 == 0x10) { |
| 1371 | data += 3; |
| 1372 | int mod, regop, rm; |
| 1373 | get_modrm(*data, &mod, ®op, &rm); |
| 1374 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1375 | data += PrintRightXMMOperand(data); |
| 1376 | } else if (b2 == 0x5A) { |
| 1377 | data += 3; |
| 1378 | int mod, regop, rm; |
| 1379 | get_modrm(*data, &mod, ®op, &rm); |
| 1380 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 1381 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1382 | } else { |
| 1383 | const char* mnem = "?"; |
| 1384 | switch (b2) { |
| 1385 | case 0x2A: mnem = "cvtsi2sd"; break; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1386 | case 0x2C: mnem = "cvttsd2si"; break; |
| 1387 | case 0x51: mnem = "sqrtsd"; break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1388 | case 0x58: mnem = "addsd"; break; |
| 1389 | case 0x59: mnem = "mulsd"; break; |
| 1390 | case 0x5C: mnem = "subsd"; break; |
| 1391 | case 0x5E: mnem = "divsd"; break; |
| 1392 | } |
| 1393 | data += 3; |
| 1394 | int mod, regop, rm; |
| 1395 | get_modrm(*data, &mod, ®op, &rm); |
| 1396 | if (b2 == 0x2A) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1397 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1398 | data += PrintRightOperand(data); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1399 | } else if (b2 == 0x2C) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1400 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 1401 | data += PrintRightXMMOperand(data); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1402 | } else if (b2 == 0xC2) { |
| 1403 | // Intel manual 2A, Table 3-18. |
| 1404 | const char* const pseudo_op[] = { |
| 1405 | "cmpeqsd", |
| 1406 | "cmpltsd", |
| 1407 | "cmplesd", |
| 1408 | "cmpunordsd", |
| 1409 | "cmpneqsd", |
| 1410 | "cmpnltsd", |
| 1411 | "cmpnlesd", |
| 1412 | "cmpordsd" |
| 1413 | }; |
| 1414 | AppendToBuffer("%s %s,%s", |
| 1415 | pseudo_op[data[1]], |
| 1416 | NameOfXMMRegister(regop), |
| 1417 | NameOfXMMRegister(rm)); |
| 1418 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1419 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1420 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1421 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1422 | } |
| 1423 | } |
| 1424 | } else { |
| 1425 | UnimplementedInstruction(); |
| 1426 | } |
| 1427 | break; |
| 1428 | |
| 1429 | case 0xF3: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1430 | if (*(data+1) == 0x0F) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1431 | byte b2 = *(data+2); |
| 1432 | if (b2 == 0x11) { |
| 1433 | AppendToBuffer("movss "); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1434 | data += 3; |
| 1435 | int mod, regop, rm; |
| 1436 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1437 | data += PrintRightXMMOperand(data); |
| 1438 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1439 | } else if (b2 == 0x10) { |
| 1440 | data += 3; |
| 1441 | int mod, regop, rm; |
| 1442 | get_modrm(*data, &mod, ®op, &rm); |
| 1443 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 1444 | data += PrintRightXMMOperand(data); |
| 1445 | } else if (b2 == 0x2C) { |
| 1446 | data += 3; |
| 1447 | int mod, regop, rm; |
| 1448 | get_modrm(*data, &mod, ®op, &rm); |
| 1449 | AppendToBuffer("cvttss2si %s,", NameOfCPURegister(regop)); |
| 1450 | data += PrintRightXMMOperand(data); |
| 1451 | } else if (b2 == 0x5A) { |
| 1452 | data += 3; |
| 1453 | int mod, regop, rm; |
| 1454 | get_modrm(*data, &mod, ®op, &rm); |
| 1455 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 1456 | data += PrintRightXMMOperand(data); |
| 1457 | } else if (b2 == 0x6F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1458 | data += 3; |
| 1459 | int mod, regop, rm; |
| 1460 | get_modrm(*data, &mod, ®op, &rm); |
| 1461 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1462 | data += PrintRightXMMOperand(data); |
| 1463 | } else if (b2 == 0x7F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1464 | AppendToBuffer("movdqu "); |
| 1465 | data += 3; |
| 1466 | int mod, regop, rm; |
| 1467 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1468 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1469 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1470 | } else { |
| 1471 | UnimplementedInstruction(); |
| 1472 | } |
| 1473 | } else if (*(data+1) == 0xA5) { |
| 1474 | data += 2; |
| 1475 | AppendToBuffer("rep_movs"); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1476 | } else if (*(data+1) == 0xAB) { |
| 1477 | data += 2; |
| 1478 | AppendToBuffer("rep_stos"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1479 | } else { |
| 1480 | UnimplementedInstruction(); |
| 1481 | } |
| 1482 | break; |
| 1483 | |
| 1484 | case 0xF7: |
| 1485 | data += F7Instruction(data); |
| 1486 | break; |
| 1487 | |
| 1488 | default: |
| 1489 | UnimplementedInstruction(); |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 1494 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 1495 | } |
| 1496 | |
| 1497 | int instr_len = data - instr; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1498 | if (instr_len == 0) { |
| 1499 | printf("%02x", *data); |
| 1500 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1501 | ASSERT(instr_len > 0); // Ensure progress. |
| 1502 | |
| 1503 | int outp = 0; |
| 1504 | // Instruction bytes. |
| 1505 | for (byte* bp = instr; bp < data; bp++) { |
| 1506 | outp += v8::internal::OS::SNPrintF(out_buffer + outp, |
| 1507 | "%02x", |
| 1508 | *bp); |
| 1509 | } |
| 1510 | for (int i = 6 - instr_len; i >= 0; i--) { |
| 1511 | outp += v8::internal::OS::SNPrintF(out_buffer + outp, |
| 1512 | " "); |
| 1513 | } |
| 1514 | |
| 1515 | outp += v8::internal::OS::SNPrintF(out_buffer + outp, |
| 1516 | " %s", |
| 1517 | tmp_buffer_.start()); |
| 1518 | return instr_len; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1519 | } // NOLINT (function is too long) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1520 | |
| 1521 | |
| 1522 | //------------------------------------------------------------------------------ |
| 1523 | |
| 1524 | |
| 1525 | static const char* cpu_regs[8] = { |
| 1526 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 1527 | }; |
| 1528 | |
| 1529 | |
| 1530 | static const char* byte_cpu_regs[8] = { |
| 1531 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 1532 | }; |
| 1533 | |
| 1534 | |
| 1535 | static const char* xmm_regs[8] = { |
| 1536 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 1537 | }; |
| 1538 | |
| 1539 | |
| 1540 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1541 | v8::internal::OS::SNPrintF(tmp_buffer_, "%p", addr); |
| 1542 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | |
| 1546 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 1547 | return NameOfAddress(addr); |
| 1548 | } |
| 1549 | |
| 1550 | |
| 1551 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 1552 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 1553 | return "noreg"; |
| 1554 | } |
| 1555 | |
| 1556 | |
| 1557 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 1558 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 1559 | return "noreg"; |
| 1560 | } |
| 1561 | |
| 1562 | |
| 1563 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 1564 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 1565 | return "noxmmreg"; |
| 1566 | } |
| 1567 | |
| 1568 | |
| 1569 | const char* NameConverter::NameInCode(byte* addr) const { |
| 1570 | // IA32 does not embed debug strings at the moment. |
| 1571 | UNREACHABLE(); |
| 1572 | return ""; |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | //------------------------------------------------------------------------------ |
| 1577 | |
| 1578 | Disassembler::Disassembler(const NameConverter& converter) |
| 1579 | : converter_(converter) {} |
| 1580 | |
| 1581 | |
| 1582 | Disassembler::~Disassembler() {} |
| 1583 | |
| 1584 | |
| 1585 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 1586 | byte* instruction) { |
| 1587 | DisassemblerIA32 d(converter_, false /*do not crash if unimplemented*/); |
| 1588 | return d.InstructionDecode(buffer, instruction); |
| 1589 | } |
| 1590 | |
| 1591 | |
| 1592 | // The IA-32 assembler does not currently use constant pools. |
| 1593 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 1594 | |
| 1595 | |
| 1596 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 1597 | NameConverter converter; |
| 1598 | Disassembler d(converter); |
| 1599 | for (byte* pc = begin; pc < end;) { |
| 1600 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 1601 | buffer[0] = '\0'; |
| 1602 | byte* prev_pc = pc; |
| 1603 | pc += d.InstructionDecode(buffer, pc); |
| 1604 | fprintf(f, "%p", prev_pc); |
| 1605 | fprintf(f, " "); |
| 1606 | |
| 1607 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 1608 | fprintf(f, "%02x", *bp); |
| 1609 | } |
| 1610 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 1611 | fprintf(f, " "); |
| 1612 | } |
| 1613 | fprintf(f, " %s\n", buffer.start()); |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | |
| 1618 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1619 | |
| 1620 | #endif // V8_TARGET_ARCH_IA32 |