Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include <assert.h> |
| 6 | #include <stdarg.h> |
| 7 | #include <stdio.h> |
| 8 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | #if V8_TARGET_ARCH_X87 |
| 10 | |
| 11 | #include "src/disasm.h" |
| 12 | |
| 13 | namespace disasm { |
| 14 | |
| 15 | enum OperandOrder { |
| 16 | UNSET_OP_ORDER = 0, |
| 17 | REG_OPER_OP_ORDER, |
| 18 | OPER_REG_OP_ORDER |
| 19 | }; |
| 20 | |
| 21 | |
| 22 | //------------------------------------------------------------------ |
| 23 | // Tables |
| 24 | //------------------------------------------------------------------ |
| 25 | struct ByteMnemonic { |
| 26 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 27 | const char* mnem; |
| 28 | OperandOrder op_order_; |
| 29 | }; |
| 30 | |
| 31 | |
| 32 | static const ByteMnemonic two_operands_instr[] = { |
| 33 | {0x01, "add", OPER_REG_OP_ORDER}, |
| 34 | {0x03, "add", REG_OPER_OP_ORDER}, |
| 35 | {0x09, "or", OPER_REG_OP_ORDER}, |
| 36 | {0x0B, "or", REG_OPER_OP_ORDER}, |
| 37 | {0x1B, "sbb", REG_OPER_OP_ORDER}, |
| 38 | {0x21, "and", OPER_REG_OP_ORDER}, |
| 39 | {0x23, "and", REG_OPER_OP_ORDER}, |
| 40 | {0x29, "sub", OPER_REG_OP_ORDER}, |
| 41 | {0x2A, "subb", REG_OPER_OP_ORDER}, |
| 42 | {0x2B, "sub", REG_OPER_OP_ORDER}, |
| 43 | {0x31, "xor", OPER_REG_OP_ORDER}, |
| 44 | {0x33, "xor", REG_OPER_OP_ORDER}, |
| 45 | {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 46 | {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 47 | {0x3B, "cmp", REG_OPER_OP_ORDER}, |
| 48 | {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 49 | {0x85, "test", REG_OPER_OP_ORDER}, |
| 50 | {0x87, "xchg", REG_OPER_OP_ORDER}, |
| 51 | {0x8A, "mov_b", REG_OPER_OP_ORDER}, |
| 52 | {0x8B, "mov", REG_OPER_OP_ORDER}, |
| 53 | {0x8D, "lea", REG_OPER_OP_ORDER}, |
| 54 | {-1, "", UNSET_OP_ORDER} |
| 55 | }; |
| 56 | |
| 57 | |
| 58 | static const ByteMnemonic zero_operands_instr[] = { |
| 59 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 60 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 61 | {0x90, "nop", UNSET_OP_ORDER}, |
| 62 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 63 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 64 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 65 | {0x61, "popad", UNSET_OP_ORDER}, |
| 66 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 67 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 68 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 69 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 70 | {0x9B, "fwait", UNSET_OP_ORDER}, |
| 71 | {0xFC, "cld", UNSET_OP_ORDER}, |
| 72 | {0xAB, "stos", UNSET_OP_ORDER}, |
| 73 | {-1, "", UNSET_OP_ORDER} |
| 74 | }; |
| 75 | |
| 76 | |
| 77 | static const ByteMnemonic call_jump_instr[] = { |
| 78 | {0xE8, "call", UNSET_OP_ORDER}, |
| 79 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 80 | {-1, "", UNSET_OP_ORDER} |
| 81 | }; |
| 82 | |
| 83 | |
| 84 | static const ByteMnemonic short_immediate_instr[] = { |
| 85 | {0x05, "add", UNSET_OP_ORDER}, |
| 86 | {0x0D, "or", UNSET_OP_ORDER}, |
| 87 | {0x15, "adc", UNSET_OP_ORDER}, |
| 88 | {0x25, "and", UNSET_OP_ORDER}, |
| 89 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 90 | {0x35, "xor", UNSET_OP_ORDER}, |
| 91 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 92 | {-1, "", UNSET_OP_ORDER} |
| 93 | }; |
| 94 | |
| 95 | |
| 96 | // Generally we don't want to generate these because they are subject to partial |
| 97 | // register stalls. They are included for completeness and because the cmp |
| 98 | // variant is used by the RecordWrite stub. Because it does not update the |
| 99 | // register it is not subject to partial register stalls. |
| 100 | static ByteMnemonic byte_immediate_instr[] = { |
| 101 | {0x0c, "or", UNSET_OP_ORDER}, |
| 102 | {0x24, "and", UNSET_OP_ORDER}, |
| 103 | {0x34, "xor", UNSET_OP_ORDER}, |
| 104 | {0x3c, "cmp", UNSET_OP_ORDER}, |
| 105 | {-1, "", UNSET_OP_ORDER} |
| 106 | }; |
| 107 | |
| 108 | |
| 109 | static const char* const jump_conditional_mnem[] = { |
| 110 | /*0*/ "jo", "jno", "jc", "jnc", |
| 111 | /*4*/ "jz", "jnz", "jna", "ja", |
| 112 | /*8*/ "js", "jns", "jpe", "jpo", |
| 113 | /*12*/ "jl", "jnl", "jng", "jg" |
| 114 | }; |
| 115 | |
| 116 | |
| 117 | static const char* const set_conditional_mnem[] = { |
| 118 | /*0*/ "seto", "setno", "setc", "setnc", |
| 119 | /*4*/ "setz", "setnz", "setna", "seta", |
| 120 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 121 | /*12*/ "setl", "setnl", "setng", "setg" |
| 122 | }; |
| 123 | |
| 124 | |
| 125 | static const char* const conditional_move_mnem[] = { |
| 126 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 127 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 128 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 129 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 130 | }; |
| 131 | |
| 132 | |
| 133 | enum InstructionType { |
| 134 | NO_INSTR, |
| 135 | ZERO_OPERANDS_INSTR, |
| 136 | TWO_OPERANDS_INSTR, |
| 137 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 138 | REGISTER_INSTR, |
| 139 | MOVE_REG_INSTR, |
| 140 | CALL_JUMP_INSTR, |
| 141 | SHORT_IMMEDIATE_INSTR, |
| 142 | BYTE_IMMEDIATE_INSTR |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | struct InstructionDesc { |
| 147 | const char* mnem; |
| 148 | InstructionType type; |
| 149 | OperandOrder op_order_; |
| 150 | }; |
| 151 | |
| 152 | |
| 153 | class InstructionTable { |
| 154 | public: |
| 155 | InstructionTable(); |
| 156 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
| 157 | static InstructionTable* get_instance() { |
| 158 | static InstructionTable table; |
| 159 | return &table; |
| 160 | } |
| 161 | |
| 162 | private: |
| 163 | InstructionDesc instructions_[256]; |
| 164 | void Clear(); |
| 165 | void Init(); |
| 166 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
| 167 | void SetTableRange(InstructionType type, |
| 168 | byte start, |
| 169 | byte end, |
| 170 | const char* mnem); |
| 171 | void AddJumpConditionalShort(); |
| 172 | }; |
| 173 | |
| 174 | |
| 175 | InstructionTable::InstructionTable() { |
| 176 | Clear(); |
| 177 | Init(); |
| 178 | } |
| 179 | |
| 180 | |
| 181 | void InstructionTable::Clear() { |
| 182 | for (int i = 0; i < 256; i++) { |
| 183 | instructions_[i].mnem = ""; |
| 184 | instructions_[i].type = NO_INSTR; |
| 185 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | |
| 190 | void InstructionTable::Init() { |
| 191 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 192 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 193 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 194 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
| 195 | CopyTable(byte_immediate_instr, BYTE_IMMEDIATE_INSTR); |
| 196 | AddJumpConditionalShort(); |
| 197 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 198 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 199 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 200 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 201 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 202 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 203 | } |
| 204 | |
| 205 | |
| 206 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 207 | InstructionType type) { |
| 208 | for (int i = 0; bm[i].b >= 0; i++) { |
| 209 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 210 | id->mnem = bm[i].mnem; |
| 211 | id->op_order_ = bm[i].op_order_; |
| 212 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 213 | id->type = type; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | |
| 218 | void InstructionTable::SetTableRange(InstructionType type, |
| 219 | byte start, |
| 220 | byte end, |
| 221 | const char* mnem) { |
| 222 | for (byte b = start; b <= end; b++) { |
| 223 | InstructionDesc* id = &instructions_[b]; |
| 224 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 225 | id->mnem = mnem; |
| 226 | id->type = type; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | |
| 231 | void InstructionTable::AddJumpConditionalShort() { |
| 232 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 233 | InstructionDesc* id = &instructions_[b]; |
| 234 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 235 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 236 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | |
| 241 | // The X87 disassembler implementation. |
| 242 | class DisassemblerX87 { |
| 243 | public: |
| 244 | DisassemblerX87(const NameConverter& converter, |
| 245 | bool abort_on_unimplemented = true) |
| 246 | : converter_(converter), |
| 247 | instruction_table_(InstructionTable::get_instance()), |
| 248 | tmp_buffer_pos_(0), |
| 249 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 250 | tmp_buffer_[0] = '\0'; |
| 251 | } |
| 252 | |
| 253 | virtual ~DisassemblerX87() {} |
| 254 | |
| 255 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 256 | // Returns the length of the disassembled machine instruction in bytes. |
| 257 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 258 | |
| 259 | private: |
| 260 | const NameConverter& converter_; |
| 261 | InstructionTable* instruction_table_; |
| 262 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 263 | unsigned int tmp_buffer_pos_; |
| 264 | bool abort_on_unimplemented_; |
| 265 | |
| 266 | enum { |
| 267 | eax = 0, |
| 268 | ecx = 1, |
| 269 | edx = 2, |
| 270 | ebx = 3, |
| 271 | esp = 4, |
| 272 | ebp = 5, |
| 273 | esi = 6, |
| 274 | edi = 7 |
| 275 | }; |
| 276 | |
| 277 | |
| 278 | enum ShiftOpcodeExtension { |
| 279 | kROL = 0, |
| 280 | kROR = 1, |
| 281 | kRCL = 2, |
| 282 | kRCR = 3, |
| 283 | kSHL = 4, |
| 284 | KSHR = 5, |
| 285 | kSAR = 7 |
| 286 | }; |
| 287 | |
| 288 | |
| 289 | const char* NameOfCPURegister(int reg) const { |
| 290 | return converter_.NameOfCPURegister(reg); |
| 291 | } |
| 292 | |
| 293 | |
| 294 | const char* NameOfByteCPURegister(int reg) const { |
| 295 | return converter_.NameOfByteCPURegister(reg); |
| 296 | } |
| 297 | |
| 298 | |
| 299 | const char* NameOfXMMRegister(int reg) const { |
| 300 | return converter_.NameOfXMMRegister(reg); |
| 301 | } |
| 302 | |
| 303 | |
| 304 | const char* NameOfAddress(byte* addr) const { |
| 305 | return converter_.NameOfAddress(addr); |
| 306 | } |
| 307 | |
| 308 | |
| 309 | // Disassembler helper functions. |
| 310 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 311 | *mod = (data >> 6) & 3; |
| 312 | *regop = (data & 0x38) >> 3; |
| 313 | *rm = data & 7; |
| 314 | } |
| 315 | |
| 316 | |
| 317 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 318 | *scale = (data >> 6) & 3; |
| 319 | *index = (data >> 3) & 7; |
| 320 | *base = data & 7; |
| 321 | } |
| 322 | |
| 323 | typedef const char* (DisassemblerX87::*RegisterNameMapping)(int reg) const; |
| 324 | |
| 325 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 326 | int PrintRightOperand(byte* modrmp); |
| 327 | int PrintRightByteOperand(byte* modrmp); |
| 328 | int PrintRightXMMOperand(byte* modrmp); |
| 329 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 330 | int PrintImmediateOp(byte* data); |
| 331 | int F7Instruction(byte* data); |
| 332 | int D1D3C1Instruction(byte* data); |
| 333 | int JumpShort(byte* data); |
| 334 | int JumpConditional(byte* data, const char* comment); |
| 335 | int JumpConditionalShort(byte* data, const char* comment); |
| 336 | int SetCC(byte* data); |
| 337 | int CMov(byte* data); |
| 338 | int FPUInstruction(byte* data); |
| 339 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 340 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
| 341 | void AppendToBuffer(const char* format, ...); |
| 342 | |
| 343 | |
| 344 | void UnimplementedInstruction() { |
| 345 | if (abort_on_unimplemented_) { |
| 346 | UNIMPLEMENTED(); |
| 347 | } else { |
| 348 | AppendToBuffer("'Unimplemented Instruction'"); |
| 349 | } |
| 350 | } |
| 351 | }; |
| 352 | |
| 353 | |
| 354 | void DisassemblerX87::AppendToBuffer(const char* format, ...) { |
| 355 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 356 | va_list args; |
| 357 | va_start(args, format); |
| 358 | int result = v8::internal::VSNPrintF(buf, format, args); |
| 359 | va_end(args); |
| 360 | tmp_buffer_pos_ += result; |
| 361 | } |
| 362 | |
| 363 | int DisassemblerX87::PrintRightOperandHelper( |
| 364 | byte* modrmp, |
| 365 | RegisterNameMapping direct_register_name) { |
| 366 | int mod, regop, rm; |
| 367 | get_modrm(*modrmp, &mod, ®op, &rm); |
| 368 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 369 | &DisassemblerX87::NameOfCPURegister; |
| 370 | switch (mod) { |
| 371 | case 0: |
| 372 | if (rm == ebp) { |
| 373 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 374 | AppendToBuffer("[0x%x]", disp); |
| 375 | return 5; |
| 376 | } else if (rm == esp) { |
| 377 | byte sib = *(modrmp + 1); |
| 378 | int scale, index, base; |
| 379 | get_sib(sib, &scale, &index, &base); |
| 380 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 381 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 382 | return 2; |
| 383 | } else if (base == ebp) { |
| 384 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
| 385 | AppendToBuffer("[%s*%d%s0x%x]", |
| 386 | (this->*register_name)(index), |
| 387 | 1 << scale, |
| 388 | disp < 0 ? "-" : "+", |
| 389 | disp < 0 ? -disp : disp); |
| 390 | return 6; |
| 391 | } else if (index != esp && base != ebp) { |
| 392 | // [base+index*scale] |
| 393 | AppendToBuffer("[%s+%s*%d]", |
| 394 | (this->*register_name)(base), |
| 395 | (this->*register_name)(index), |
| 396 | 1 << scale); |
| 397 | return 2; |
| 398 | } else { |
| 399 | UnimplementedInstruction(); |
| 400 | return 1; |
| 401 | } |
| 402 | } else { |
| 403 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 404 | return 1; |
| 405 | } |
| 406 | break; |
| 407 | case 1: // fall through |
| 408 | case 2: |
| 409 | if (rm == esp) { |
| 410 | byte sib = *(modrmp + 1); |
| 411 | int scale, index, base; |
| 412 | get_sib(sib, &scale, &index, &base); |
| 413 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) |
| 414 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
| 415 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
| 416 | AppendToBuffer("[%s%s0x%x]", |
| 417 | (this->*register_name)(rm), |
| 418 | disp < 0 ? "-" : "+", |
| 419 | disp < 0 ? -disp : disp); |
| 420 | } else { |
| 421 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
| 422 | (this->*register_name)(base), |
| 423 | (this->*register_name)(index), |
| 424 | 1 << scale, |
| 425 | disp < 0 ? "-" : "+", |
| 426 | disp < 0 ? -disp : disp); |
| 427 | } |
| 428 | return mod == 2 ? 6 : 3; |
| 429 | } else { |
| 430 | // No sib. |
| 431 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) |
| 432 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 433 | AppendToBuffer("[%s%s0x%x]", |
| 434 | (this->*register_name)(rm), |
| 435 | disp < 0 ? "-" : "+", |
| 436 | disp < 0 ? -disp : disp); |
| 437 | return mod == 2 ? 5 : 2; |
| 438 | } |
| 439 | break; |
| 440 | case 3: |
| 441 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 442 | return 1; |
| 443 | default: |
| 444 | UnimplementedInstruction(); |
| 445 | return 1; |
| 446 | } |
| 447 | UNREACHABLE(); |
| 448 | } |
| 449 | |
| 450 | |
| 451 | int DisassemblerX87::PrintRightOperand(byte* modrmp) { |
| 452 | return PrintRightOperandHelper(modrmp, &DisassemblerX87::NameOfCPURegister); |
| 453 | } |
| 454 | |
| 455 | |
| 456 | int DisassemblerX87::PrintRightByteOperand(byte* modrmp) { |
| 457 | return PrintRightOperandHelper(modrmp, |
| 458 | &DisassemblerX87::NameOfByteCPURegister); |
| 459 | } |
| 460 | |
| 461 | |
| 462 | int DisassemblerX87::PrintRightXMMOperand(byte* modrmp) { |
| 463 | return PrintRightOperandHelper(modrmp, |
| 464 | &DisassemblerX87::NameOfXMMRegister); |
| 465 | } |
| 466 | |
| 467 | |
| 468 | // Returns number of bytes used including the current *data. |
| 469 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 470 | int DisassemblerX87::PrintOperands(const char* mnem, |
| 471 | OperandOrder op_order, |
| 472 | byte* data) { |
| 473 | byte modrm = *data; |
| 474 | int mod, regop, rm; |
| 475 | get_modrm(modrm, &mod, ®op, &rm); |
| 476 | int advance = 0; |
| 477 | switch (op_order) { |
| 478 | case REG_OPER_OP_ORDER: { |
| 479 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 480 | advance = PrintRightOperand(data); |
| 481 | break; |
| 482 | } |
| 483 | case OPER_REG_OP_ORDER: { |
| 484 | AppendToBuffer("%s ", mnem); |
| 485 | advance = PrintRightOperand(data); |
| 486 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 487 | break; |
| 488 | } |
| 489 | default: |
| 490 | UNREACHABLE(); |
| 491 | break; |
| 492 | } |
| 493 | return advance; |
| 494 | } |
| 495 | |
| 496 | |
| 497 | // Returns number of bytes used by machine instruction, including *data byte. |
| 498 | // Writes immediate instructions to 'tmp_buffer_'. |
| 499 | int DisassemblerX87::PrintImmediateOp(byte* data) { |
| 500 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 501 | byte modrm = *(data+1); |
| 502 | int mod, regop, rm; |
| 503 | get_modrm(modrm, &mod, ®op, &rm); |
| 504 | const char* mnem = "Imm???"; |
| 505 | switch (regop) { |
| 506 | case 0: mnem = "add"; break; |
| 507 | case 1: mnem = "or"; break; |
| 508 | case 2: mnem = "adc"; break; |
| 509 | case 4: mnem = "and"; break; |
| 510 | case 5: mnem = "sub"; break; |
| 511 | case 6: mnem = "xor"; break; |
| 512 | case 7: mnem = "cmp"; break; |
| 513 | default: UnimplementedInstruction(); |
| 514 | } |
| 515 | AppendToBuffer("%s ", mnem); |
| 516 | int count = PrintRightOperand(data+1); |
| 517 | if (sign_extension_bit) { |
| 518 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 519 | return 1 + count + 1 /*int8*/; |
| 520 | } else { |
| 521 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 522 | return 1 + count + 4 /*int32_t*/; |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | |
| 527 | // Returns number of bytes used, including *data. |
| 528 | int DisassemblerX87::F7Instruction(byte* data) { |
| 529 | DCHECK_EQ(0xF7, *data); |
| 530 | byte modrm = *++data; |
| 531 | int mod, regop, rm; |
| 532 | get_modrm(modrm, &mod, ®op, &rm); |
| 533 | const char* mnem = NULL; |
| 534 | switch (regop) { |
| 535 | case 0: |
| 536 | mnem = "test"; |
| 537 | break; |
| 538 | case 2: |
| 539 | mnem = "not"; |
| 540 | break; |
| 541 | case 3: |
| 542 | mnem = "neg"; |
| 543 | break; |
| 544 | case 4: |
| 545 | mnem = "mul"; |
| 546 | break; |
| 547 | case 5: |
| 548 | mnem = "imul"; |
| 549 | break; |
| 550 | case 6: |
| 551 | mnem = "div"; |
| 552 | break; |
| 553 | case 7: |
| 554 | mnem = "idiv"; |
| 555 | break; |
| 556 | default: |
| 557 | UnimplementedInstruction(); |
| 558 | } |
| 559 | AppendToBuffer("%s ", mnem); |
| 560 | int count = PrintRightOperand(data); |
| 561 | if (regop == 0) { |
| 562 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + count)); |
| 563 | count += 4; |
| 564 | } |
| 565 | return 1 + count; |
| 566 | } |
| 567 | |
| 568 | |
| 569 | int DisassemblerX87::D1D3C1Instruction(byte* data) { |
| 570 | byte op = *data; |
| 571 | DCHECK(op == 0xD1 || op == 0xD3 || op == 0xC1); |
| 572 | byte modrm = *++data; |
| 573 | int mod, regop, rm; |
| 574 | get_modrm(modrm, &mod, ®op, &rm); |
| 575 | int imm8 = -1; |
| 576 | const char* mnem = NULL; |
| 577 | switch (regop) { |
| 578 | case kROL: |
| 579 | mnem = "rol"; |
| 580 | break; |
| 581 | case kROR: |
| 582 | mnem = "ror"; |
| 583 | break; |
| 584 | case kRCL: |
| 585 | mnem = "rcl"; |
| 586 | break; |
| 587 | case kRCR: |
| 588 | mnem = "rcr"; |
| 589 | break; |
| 590 | case kSHL: |
| 591 | mnem = "shl"; |
| 592 | break; |
| 593 | case KSHR: |
| 594 | mnem = "shr"; |
| 595 | break; |
| 596 | case kSAR: |
| 597 | mnem = "sar"; |
| 598 | break; |
| 599 | default: |
| 600 | UnimplementedInstruction(); |
| 601 | } |
| 602 | AppendToBuffer("%s ", mnem); |
| 603 | int count = PrintRightOperand(data); |
| 604 | if (op == 0xD1) { |
| 605 | imm8 = 1; |
| 606 | } else if (op == 0xC1) { |
| 607 | imm8 = *(data + 1); |
| 608 | count++; |
| 609 | } else if (op == 0xD3) { |
| 610 | // Shift/rotate by cl. |
| 611 | } |
| 612 | if (imm8 >= 0) { |
| 613 | AppendToBuffer(",%d", imm8); |
| 614 | } else { |
| 615 | AppendToBuffer(",cl"); |
| 616 | } |
| 617 | return 1 + count; |
| 618 | } |
| 619 | |
| 620 | |
| 621 | // Returns number of bytes used, including *data. |
| 622 | int DisassemblerX87::JumpShort(byte* data) { |
| 623 | DCHECK_EQ(0xEB, *data); |
| 624 | byte b = *(data+1); |
| 625 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 626 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 627 | return 2; |
| 628 | } |
| 629 | |
| 630 | |
| 631 | // Returns number of bytes used, including *data. |
| 632 | int DisassemblerX87::JumpConditional(byte* data, const char* comment) { |
| 633 | DCHECK_EQ(0x0F, *data); |
| 634 | byte cond = *(data+1) & 0x0F; |
| 635 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 636 | const char* mnem = jump_conditional_mnem[cond]; |
| 637 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 638 | if (comment != NULL) { |
| 639 | AppendToBuffer(", %s", comment); |
| 640 | } |
| 641 | return 6; // includes 0x0F |
| 642 | } |
| 643 | |
| 644 | |
| 645 | // Returns number of bytes used, including *data. |
| 646 | int DisassemblerX87::JumpConditionalShort(byte* data, const char* comment) { |
| 647 | byte cond = *data & 0x0F; |
| 648 | byte b = *(data+1); |
| 649 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 650 | const char* mnem = jump_conditional_mnem[cond]; |
| 651 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 652 | if (comment != NULL) { |
| 653 | AppendToBuffer(", %s", comment); |
| 654 | } |
| 655 | return 2; |
| 656 | } |
| 657 | |
| 658 | |
| 659 | // Returns number of bytes used, including *data. |
| 660 | int DisassemblerX87::SetCC(byte* data) { |
| 661 | DCHECK_EQ(0x0F, *data); |
| 662 | byte cond = *(data+1) & 0x0F; |
| 663 | const char* mnem = set_conditional_mnem[cond]; |
| 664 | AppendToBuffer("%s ", mnem); |
| 665 | PrintRightByteOperand(data+2); |
| 666 | return 3; // Includes 0x0F. |
| 667 | } |
| 668 | |
| 669 | |
| 670 | // Returns number of bytes used, including *data. |
| 671 | int DisassemblerX87::CMov(byte* data) { |
| 672 | DCHECK_EQ(0x0F, *data); |
| 673 | byte cond = *(data + 1) & 0x0F; |
| 674 | const char* mnem = conditional_move_mnem[cond]; |
| 675 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 676 | return 2 + op_size; // includes 0x0F |
| 677 | } |
| 678 | |
| 679 | |
| 680 | // Returns number of bytes used, including *data. |
| 681 | int DisassemblerX87::FPUInstruction(byte* data) { |
| 682 | byte escape_opcode = *data; |
| 683 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
| 684 | byte modrm_byte = *(data+1); |
| 685 | |
| 686 | if (modrm_byte >= 0xC0) { |
| 687 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 688 | } else { |
| 689 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | int DisassemblerX87::MemoryFPUInstruction(int escape_opcode, |
| 694 | int modrm_byte, |
| 695 | byte* modrm_start) { |
| 696 | const char* mnem = "?"; |
| 697 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 698 | switch (escape_opcode) { |
| 699 | case 0xD9: switch (regop) { |
| 700 | case 0: mnem = "fld_s"; break; |
| 701 | case 2: mnem = "fst_s"; break; |
| 702 | case 3: mnem = "fstp_s"; break; |
| 703 | case 5: |
| 704 | mnem = "fldcw"; |
| 705 | break; |
| 706 | case 7: |
| 707 | mnem = "fnstcw"; |
| 708 | break; |
| 709 | default: UnimplementedInstruction(); |
| 710 | } |
| 711 | break; |
| 712 | |
| 713 | case 0xDB: switch (regop) { |
| 714 | case 0: mnem = "fild_s"; break; |
| 715 | case 1: mnem = "fisttp_s"; break; |
| 716 | case 2: mnem = "fist_s"; break; |
| 717 | case 3: mnem = "fistp_s"; break; |
| 718 | default: UnimplementedInstruction(); |
| 719 | } |
| 720 | break; |
| 721 | |
| 722 | case 0xDC: |
| 723 | switch (regop) { |
| 724 | case 0: |
| 725 | mnem = "fadd_d"; |
| 726 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 727 | case 1: |
| 728 | mnem = "fmul_d"; |
| 729 | break; |
| 730 | case 4: |
| 731 | mnem = "fsub_d"; |
| 732 | break; |
| 733 | case 5: |
| 734 | mnem = "fsubr_d"; |
| 735 | break; |
| 736 | case 6: |
| 737 | mnem = "fdiv_d"; |
| 738 | break; |
| 739 | case 7: |
| 740 | mnem = "fdivr_d"; |
| 741 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 742 | default: |
| 743 | UnimplementedInstruction(); |
| 744 | } |
| 745 | break; |
| 746 | |
| 747 | case 0xDD: switch (regop) { |
| 748 | case 0: mnem = "fld_d"; break; |
| 749 | case 1: mnem = "fisttp_d"; break; |
| 750 | case 2: mnem = "fst_d"; break; |
| 751 | case 3: mnem = "fstp_d"; break; |
| 752 | case 4: |
| 753 | mnem = "frstor"; |
| 754 | break; |
| 755 | case 6: |
| 756 | mnem = "fnsave"; |
| 757 | break; |
| 758 | default: UnimplementedInstruction(); |
| 759 | } |
| 760 | break; |
| 761 | |
| 762 | case 0xDF: switch (regop) { |
| 763 | case 5: mnem = "fild_d"; break; |
| 764 | case 7: mnem = "fistp_d"; break; |
| 765 | default: UnimplementedInstruction(); |
| 766 | } |
| 767 | break; |
| 768 | |
| 769 | default: UnimplementedInstruction(); |
| 770 | } |
| 771 | AppendToBuffer("%s ", mnem); |
| 772 | int count = PrintRightOperand(modrm_start); |
| 773 | return count + 1; |
| 774 | } |
| 775 | |
| 776 | int DisassemblerX87::RegisterFPUInstruction(int escape_opcode, |
| 777 | byte modrm_byte) { |
| 778 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 779 | const char* mnem = "?"; |
| 780 | |
| 781 | switch (escape_opcode) { |
| 782 | case 0xD8: |
| 783 | has_register = true; |
| 784 | switch (modrm_byte & 0xF8) { |
| 785 | case 0xC0: mnem = "fadd_i"; break; |
| 786 | case 0xE0: mnem = "fsub_i"; break; |
| 787 | case 0xC8: mnem = "fmul_i"; break; |
| 788 | case 0xF0: mnem = "fdiv_i"; break; |
| 789 | default: UnimplementedInstruction(); |
| 790 | } |
| 791 | break; |
| 792 | |
| 793 | case 0xD9: |
| 794 | switch (modrm_byte & 0xF8) { |
| 795 | case 0xC0: |
| 796 | mnem = "fld"; |
| 797 | has_register = true; |
| 798 | break; |
| 799 | case 0xC8: |
| 800 | mnem = "fxch"; |
| 801 | has_register = true; |
| 802 | break; |
| 803 | default: |
| 804 | switch (modrm_byte) { |
| 805 | case 0xE0: mnem = "fchs"; break; |
| 806 | case 0xE1: mnem = "fabs"; break; |
| 807 | case 0xE4: mnem = "ftst"; break; |
| 808 | case 0xE8: mnem = "fld1"; break; |
| 809 | case 0xEB: mnem = "fldpi"; break; |
| 810 | case 0xED: mnem = "fldln2"; break; |
| 811 | case 0xEE: mnem = "fldz"; break; |
| 812 | case 0xF0: mnem = "f2xm1"; break; |
| 813 | case 0xF1: mnem = "fyl2x"; break; |
| 814 | case 0xF4: mnem = "fxtract"; break; |
| 815 | case 0xF5: mnem = "fprem1"; break; |
| 816 | case 0xF7: mnem = "fincstp"; break; |
| 817 | case 0xF8: mnem = "fprem"; break; |
| 818 | case 0xFC: mnem = "frndint"; break; |
| 819 | case 0xFD: mnem = "fscale"; break; |
| 820 | case 0xFE: mnem = "fsin"; break; |
| 821 | case 0xFF: mnem = "fcos"; break; |
| 822 | default: UnimplementedInstruction(); |
| 823 | } |
| 824 | } |
| 825 | break; |
| 826 | |
| 827 | case 0xDA: |
| 828 | if (modrm_byte == 0xE9) { |
| 829 | mnem = "fucompp"; |
| 830 | } else { |
| 831 | UnimplementedInstruction(); |
| 832 | } |
| 833 | break; |
| 834 | |
| 835 | case 0xDB: |
| 836 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 837 | mnem = "fucomi"; |
| 838 | has_register = true; |
| 839 | } else if (modrm_byte == 0xE2) { |
| 840 | mnem = "fclex"; |
| 841 | } else if (modrm_byte == 0xE3) { |
| 842 | mnem = "fninit"; |
| 843 | } else { |
| 844 | UnimplementedInstruction(); |
| 845 | } |
| 846 | break; |
| 847 | |
| 848 | case 0xDC: |
| 849 | has_register = true; |
| 850 | switch (modrm_byte & 0xF8) { |
| 851 | case 0xC0: mnem = "fadd"; break; |
| 852 | case 0xE8: mnem = "fsub"; break; |
| 853 | case 0xC8: mnem = "fmul"; break; |
| 854 | case 0xF8: mnem = "fdiv"; break; |
| 855 | default: UnimplementedInstruction(); |
| 856 | } |
| 857 | break; |
| 858 | |
| 859 | case 0xDD: |
| 860 | has_register = true; |
| 861 | switch (modrm_byte & 0xF8) { |
| 862 | case 0xC0: mnem = "ffree"; break; |
| 863 | case 0xD0: mnem = "fst"; break; |
| 864 | case 0xD8: mnem = "fstp"; break; |
| 865 | default: UnimplementedInstruction(); |
| 866 | } |
| 867 | break; |
| 868 | |
| 869 | case 0xDE: |
| 870 | if (modrm_byte == 0xD9) { |
| 871 | mnem = "fcompp"; |
| 872 | } else { |
| 873 | has_register = true; |
| 874 | switch (modrm_byte & 0xF8) { |
| 875 | case 0xC0: mnem = "faddp"; break; |
| 876 | case 0xE8: mnem = "fsubp"; break; |
| 877 | case 0xC8: mnem = "fmulp"; break; |
| 878 | case 0xF8: mnem = "fdivp"; break; |
| 879 | default: UnimplementedInstruction(); |
| 880 | } |
| 881 | } |
| 882 | break; |
| 883 | |
| 884 | case 0xDF: |
| 885 | if (modrm_byte == 0xE0) { |
| 886 | mnem = "fnstsw_ax"; |
| 887 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 888 | mnem = "fucomip"; |
| 889 | has_register = true; |
| 890 | } |
| 891 | break; |
| 892 | |
| 893 | default: UnimplementedInstruction(); |
| 894 | } |
| 895 | |
| 896 | if (has_register) { |
| 897 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 898 | } else { |
| 899 | AppendToBuffer("%s", mnem); |
| 900 | } |
| 901 | return 2; |
| 902 | } |
| 903 | |
| 904 | |
| 905 | // Mnemonics for instructions 0xF0 byte. |
| 906 | // Returns NULL if the instruction is not handled here. |
| 907 | static const char* F0Mnem(byte f0byte) { |
| 908 | switch (f0byte) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 909 | case 0x0B: |
| 910 | return "ud2"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 911 | case 0x18: return "prefetch"; |
| 912 | case 0xA2: return "cpuid"; |
| 913 | case 0xBE: return "movsx_b"; |
| 914 | case 0xBF: return "movsx_w"; |
| 915 | case 0xB6: return "movzx_b"; |
| 916 | case 0xB7: return "movzx_w"; |
| 917 | case 0xAF: return "imul"; |
| 918 | case 0xA5: return "shld"; |
| 919 | case 0xAD: return "shrd"; |
| 920 | case 0xAC: return "shrd"; // 3-operand version. |
| 921 | case 0xAB: return "bts"; |
| 922 | case 0xBD: return "bsr"; |
| 923 | default: return NULL; |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | |
| 928 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 929 | int DisassemblerX87::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 930 | byte* instr) { |
| 931 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 932 | byte* data = instr; |
| 933 | // Check for hints. |
| 934 | const char* branch_hint = NULL; |
| 935 | // We use these two prefixes only with branch prediction |
| 936 | if (*data == 0x3E /*ds*/) { |
| 937 | branch_hint = "predicted taken"; |
| 938 | data++; |
| 939 | } else if (*data == 0x2E /*cs*/) { |
| 940 | branch_hint = "predicted not taken"; |
| 941 | data++; |
| 942 | } |
| 943 | bool processed = true; // Will be set to false if the current instruction |
| 944 | // is not in 'instructions' table. |
| 945 | const InstructionDesc& idesc = instruction_table_->Get(*data); |
| 946 | switch (idesc.type) { |
| 947 | case ZERO_OPERANDS_INSTR: |
| 948 | AppendToBuffer(idesc.mnem); |
| 949 | data++; |
| 950 | break; |
| 951 | |
| 952 | case TWO_OPERANDS_INSTR: |
| 953 | data++; |
| 954 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 955 | break; |
| 956 | |
| 957 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 958 | data += JumpConditionalShort(data, branch_hint); |
| 959 | break; |
| 960 | |
| 961 | case REGISTER_INSTR: |
| 962 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 963 | data++; |
| 964 | break; |
| 965 | |
| 966 | case MOVE_REG_INSTR: { |
| 967 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 968 | AppendToBuffer("mov %s,%s", |
| 969 | NameOfCPURegister(*data & 0x07), |
| 970 | NameOfAddress(addr)); |
| 971 | data += 5; |
| 972 | break; |
| 973 | } |
| 974 | |
| 975 | case CALL_JUMP_INSTR: { |
| 976 | byte* addr = data + *reinterpret_cast<int32_t*>(data+1) + 5; |
| 977 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 978 | data += 5; |
| 979 | break; |
| 980 | } |
| 981 | |
| 982 | case SHORT_IMMEDIATE_INSTR: { |
| 983 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 984 | AppendToBuffer("%s eax,%s", idesc.mnem, NameOfAddress(addr)); |
| 985 | data += 5; |
| 986 | break; |
| 987 | } |
| 988 | |
| 989 | case BYTE_IMMEDIATE_INSTR: { |
| 990 | AppendToBuffer("%s al,0x%x", idesc.mnem, data[1]); |
| 991 | data += 2; |
| 992 | break; |
| 993 | } |
| 994 | |
| 995 | case NO_INSTR: |
| 996 | processed = false; |
| 997 | break; |
| 998 | |
| 999 | default: |
| 1000 | UNIMPLEMENTED(); // This type is not implemented. |
| 1001 | } |
| 1002 | //---------------------------- |
| 1003 | if (!processed) { |
| 1004 | switch (*data) { |
| 1005 | case 0xC2: |
| 1006 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 1007 | data += 3; |
| 1008 | break; |
| 1009 | |
| 1010 | case 0x6B: { |
| 1011 | data++; |
| 1012 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1013 | AppendToBuffer(",%d", *data); |
| 1014 | data++; |
| 1015 | } break; |
| 1016 | |
| 1017 | case 0x69: { |
| 1018 | data++; |
| 1019 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1020 | AppendToBuffer(",%d", *reinterpret_cast<int32_t*>(data)); |
| 1021 | data += 4; |
| 1022 | } |
| 1023 | break; |
| 1024 | |
| 1025 | case 0xF6: |
| 1026 | { data++; |
| 1027 | int mod, regop, rm; |
| 1028 | get_modrm(*data, &mod, ®op, &rm); |
| 1029 | if (regop == eax) { |
| 1030 | AppendToBuffer("test_b "); |
| 1031 | data += PrintRightByteOperand(data); |
| 1032 | int32_t imm = *data; |
| 1033 | AppendToBuffer(",0x%x", imm); |
| 1034 | data++; |
| 1035 | } else { |
| 1036 | UnimplementedInstruction(); |
| 1037 | } |
| 1038 | } |
| 1039 | break; |
| 1040 | |
| 1041 | case 0x81: // fall through |
| 1042 | case 0x83: // 0x81 with sign extension bit set |
| 1043 | data += PrintImmediateOp(data); |
| 1044 | break; |
| 1045 | |
| 1046 | case 0x0F: |
| 1047 | { byte f0byte = data[1]; |
| 1048 | const char* f0mnem = F0Mnem(f0byte); |
| 1049 | if (f0byte == 0x18) { |
| 1050 | data += 2; |
| 1051 | int mod, regop, rm; |
| 1052 | get_modrm(*data, &mod, ®op, &rm); |
| 1053 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 1054 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 1055 | data += PrintRightOperand(data); |
| 1056 | } else if (f0byte == 0x1F && data[2] == 0) { |
| 1057 | AppendToBuffer("nop"); // 3 byte nop. |
| 1058 | data += 3; |
| 1059 | } else if (f0byte == 0x1F && data[2] == 0x40 && data[3] == 0) { |
| 1060 | AppendToBuffer("nop"); // 4 byte nop. |
| 1061 | data += 4; |
| 1062 | } else if (f0byte == 0x1F && data[2] == 0x44 && data[3] == 0 && |
| 1063 | data[4] == 0) { |
| 1064 | AppendToBuffer("nop"); // 5 byte nop. |
| 1065 | data += 5; |
| 1066 | } else if (f0byte == 0x1F && data[2] == 0x80 && data[3] == 0 && |
| 1067 | data[4] == 0 && data[5] == 0 && data[6] == 0) { |
| 1068 | AppendToBuffer("nop"); // 7 byte nop. |
| 1069 | data += 7; |
| 1070 | } else if (f0byte == 0x1F && data[2] == 0x84 && data[3] == 0 && |
| 1071 | data[4] == 0 && data[5] == 0 && data[6] == 0 && |
| 1072 | data[7] == 0) { |
| 1073 | AppendToBuffer("nop"); // 8 byte nop. |
| 1074 | data += 8; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1075 | } else if (f0byte == 0x0B || f0byte == 0xA2 || f0byte == 0x31) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1076 | AppendToBuffer("%s", f0mnem); |
| 1077 | data += 2; |
| 1078 | } else if (f0byte == 0x28) { |
| 1079 | data += 2; |
| 1080 | int mod, regop, rm; |
| 1081 | get_modrm(*data, &mod, ®op, &rm); |
| 1082 | AppendToBuffer("movaps %s,%s", |
| 1083 | NameOfXMMRegister(regop), |
| 1084 | NameOfXMMRegister(rm)); |
| 1085 | data++; |
| 1086 | } else if (f0byte >= 0x53 && f0byte <= 0x5F) { |
| 1087 | const char* const pseudo_op[] = { |
| 1088 | "rcpps", |
| 1089 | "andps", |
| 1090 | "andnps", |
| 1091 | "orps", |
| 1092 | "xorps", |
| 1093 | "addps", |
| 1094 | "mulps", |
| 1095 | "cvtps2pd", |
| 1096 | "cvtdq2ps", |
| 1097 | "subps", |
| 1098 | "minps", |
| 1099 | "divps", |
| 1100 | "maxps", |
| 1101 | }; |
| 1102 | |
| 1103 | data += 2; |
| 1104 | int mod, regop, rm; |
| 1105 | get_modrm(*data, &mod, ®op, &rm); |
| 1106 | AppendToBuffer("%s %s,", |
| 1107 | pseudo_op[f0byte - 0x53], |
| 1108 | NameOfXMMRegister(regop)); |
| 1109 | data += PrintRightXMMOperand(data); |
| 1110 | } else if (f0byte == 0x50) { |
| 1111 | data += 2; |
| 1112 | int mod, regop, rm; |
| 1113 | get_modrm(*data, &mod, ®op, &rm); |
| 1114 | AppendToBuffer("movmskps %s,%s", |
| 1115 | NameOfCPURegister(regop), |
| 1116 | NameOfXMMRegister(rm)); |
| 1117 | data++; |
| 1118 | } else if (f0byte== 0xC6) { |
| 1119 | // shufps xmm, xmm/m128, imm8 |
| 1120 | data += 2; |
| 1121 | int mod, regop, rm; |
| 1122 | get_modrm(*data, &mod, ®op, &rm); |
| 1123 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1124 | AppendToBuffer("shufps %s,%s,%d", |
| 1125 | NameOfXMMRegister(rm), |
| 1126 | NameOfXMMRegister(regop), |
| 1127 | static_cast<int>(imm8)); |
| 1128 | data += 2; |
| 1129 | } else if ((f0byte & 0xF0) == 0x80) { |
| 1130 | data += JumpConditional(data, branch_hint); |
| 1131 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 1132 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 1133 | data += 2; |
| 1134 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 1135 | } else if ((f0byte & 0xF0) == 0x90) { |
| 1136 | data += SetCC(data); |
| 1137 | } else if ((f0byte & 0xF0) == 0x40) { |
| 1138 | data += CMov(data); |
| 1139 | } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
| 1140 | // shrd, shld, bts |
| 1141 | data += 2; |
| 1142 | AppendToBuffer("%s ", f0mnem); |
| 1143 | int mod, regop, rm; |
| 1144 | get_modrm(*data, &mod, ®op, &rm); |
| 1145 | data += PrintRightOperand(data); |
| 1146 | if (f0byte == 0xAB) { |
| 1147 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1148 | } else { |
| 1149 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
| 1150 | } |
| 1151 | } else if (f0byte == 0xBD) { |
| 1152 | data += 2; |
| 1153 | int mod, regop, rm; |
| 1154 | get_modrm(*data, &mod, ®op, &rm); |
| 1155 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1156 | data += PrintRightOperand(data); |
| 1157 | } else { |
| 1158 | UnimplementedInstruction(); |
| 1159 | } |
| 1160 | } |
| 1161 | break; |
| 1162 | |
| 1163 | case 0x8F: |
| 1164 | { data++; |
| 1165 | int mod, regop, rm; |
| 1166 | get_modrm(*data, &mod, ®op, &rm); |
| 1167 | if (regop == eax) { |
| 1168 | AppendToBuffer("pop "); |
| 1169 | data += PrintRightOperand(data); |
| 1170 | } |
| 1171 | } |
| 1172 | break; |
| 1173 | |
| 1174 | case 0xFF: |
| 1175 | { data++; |
| 1176 | int mod, regop, rm; |
| 1177 | get_modrm(*data, &mod, ®op, &rm); |
| 1178 | const char* mnem = NULL; |
| 1179 | switch (regop) { |
| 1180 | case esi: mnem = "push"; break; |
| 1181 | case eax: mnem = "inc"; break; |
| 1182 | case ecx: mnem = "dec"; break; |
| 1183 | case edx: mnem = "call"; break; |
| 1184 | case esp: mnem = "jmp"; break; |
| 1185 | default: mnem = "???"; |
| 1186 | } |
| 1187 | AppendToBuffer("%s ", mnem); |
| 1188 | data += PrintRightOperand(data); |
| 1189 | } |
| 1190 | break; |
| 1191 | |
| 1192 | case 0xC7: // imm32, fall through |
| 1193 | case 0xC6: // imm8 |
| 1194 | { bool is_byte = *data == 0xC6; |
| 1195 | data++; |
| 1196 | if (is_byte) { |
| 1197 | AppendToBuffer("%s ", "mov_b"); |
| 1198 | data += PrintRightByteOperand(data); |
| 1199 | int32_t imm = *data; |
| 1200 | AppendToBuffer(",0x%x", imm); |
| 1201 | data++; |
| 1202 | } else { |
| 1203 | AppendToBuffer("%s ", "mov"); |
| 1204 | data += PrintRightOperand(data); |
| 1205 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1206 | AppendToBuffer(",0x%x", imm); |
| 1207 | data += 4; |
| 1208 | } |
| 1209 | } |
| 1210 | break; |
| 1211 | |
| 1212 | case 0x80: |
| 1213 | { data++; |
| 1214 | int mod, regop, rm; |
| 1215 | get_modrm(*data, &mod, ®op, &rm); |
| 1216 | const char* mnem = NULL; |
| 1217 | switch (regop) { |
| 1218 | case 5: mnem = "subb"; break; |
| 1219 | case 7: mnem = "cmpb"; break; |
| 1220 | default: UnimplementedInstruction(); |
| 1221 | } |
| 1222 | AppendToBuffer("%s ", mnem); |
| 1223 | data += PrintRightByteOperand(data); |
| 1224 | int32_t imm = *data; |
| 1225 | AppendToBuffer(",0x%x", imm); |
| 1226 | data++; |
| 1227 | } |
| 1228 | break; |
| 1229 | |
| 1230 | case 0x88: // 8bit, fall through |
| 1231 | case 0x89: // 32bit |
| 1232 | { bool is_byte = *data == 0x88; |
| 1233 | int mod, regop, rm; |
| 1234 | data++; |
| 1235 | get_modrm(*data, &mod, ®op, &rm); |
| 1236 | if (is_byte) { |
| 1237 | AppendToBuffer("%s ", "mov_b"); |
| 1238 | data += PrintRightByteOperand(data); |
| 1239 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1240 | } else { |
| 1241 | AppendToBuffer("%s ", "mov"); |
| 1242 | data += PrintRightOperand(data); |
| 1243 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1244 | } |
| 1245 | } |
| 1246 | break; |
| 1247 | |
| 1248 | case 0x66: // prefix |
| 1249 | while (*data == 0x66) data++; |
| 1250 | if (*data == 0xf && data[1] == 0x1f) { |
| 1251 | AppendToBuffer("nop"); // 0x66 prefix |
| 1252 | } else if (*data == 0x90) { |
| 1253 | AppendToBuffer("nop"); // 0x66 prefix |
| 1254 | } else if (*data == 0x8B) { |
| 1255 | data++; |
| 1256 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
| 1257 | } else if (*data == 0x89) { |
| 1258 | data++; |
| 1259 | int mod, regop, rm; |
| 1260 | get_modrm(*data, &mod, ®op, &rm); |
| 1261 | AppendToBuffer("mov_w "); |
| 1262 | data += PrintRightOperand(data); |
| 1263 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1264 | } else if (*data == 0xC7) { |
| 1265 | data++; |
| 1266 | AppendToBuffer("%s ", "mov_w"); |
| 1267 | data += PrintRightOperand(data); |
| 1268 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1269 | AppendToBuffer(",0x%x", imm); |
| 1270 | data += 2; |
| 1271 | } else if (*data == 0x0F) { |
| 1272 | data++; |
| 1273 | if (*data == 0x38) { |
| 1274 | data++; |
| 1275 | if (*data == 0x17) { |
| 1276 | data++; |
| 1277 | int mod, regop, rm; |
| 1278 | get_modrm(*data, &mod, ®op, &rm); |
| 1279 | AppendToBuffer("ptest %s,%s", |
| 1280 | NameOfXMMRegister(regop), |
| 1281 | NameOfXMMRegister(rm)); |
| 1282 | data++; |
| 1283 | } else if (*data == 0x2A) { |
| 1284 | // movntdqa |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1285 | UnimplementedInstruction(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1286 | } else { |
| 1287 | UnimplementedInstruction(); |
| 1288 | } |
| 1289 | } else if (*data == 0x3A) { |
| 1290 | data++; |
| 1291 | if (*data == 0x0B) { |
| 1292 | data++; |
| 1293 | int mod, regop, rm; |
| 1294 | get_modrm(*data, &mod, ®op, &rm); |
| 1295 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1296 | AppendToBuffer("roundsd %s,%s,%d", |
| 1297 | NameOfXMMRegister(regop), |
| 1298 | NameOfXMMRegister(rm), |
| 1299 | static_cast<int>(imm8)); |
| 1300 | data += 2; |
| 1301 | } else if (*data == 0x16) { |
| 1302 | data++; |
| 1303 | int mod, regop, rm; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1304 | get_modrm(*data, &mod, &rm, ®op); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1305 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1306 | AppendToBuffer("pextrd %s,%s,%d", |
| 1307 | NameOfCPURegister(regop), |
| 1308 | NameOfXMMRegister(rm), |
| 1309 | static_cast<int>(imm8)); |
| 1310 | data += 2; |
| 1311 | } else if (*data == 0x17) { |
| 1312 | data++; |
| 1313 | int mod, regop, rm; |
| 1314 | get_modrm(*data, &mod, ®op, &rm); |
| 1315 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1316 | AppendToBuffer("extractps %s,%s,%d", |
| 1317 | NameOfCPURegister(rm), |
| 1318 | NameOfXMMRegister(regop), |
| 1319 | static_cast<int>(imm8)); |
| 1320 | data += 2; |
| 1321 | } else if (*data == 0x22) { |
| 1322 | data++; |
| 1323 | int mod, regop, rm; |
| 1324 | get_modrm(*data, &mod, ®op, &rm); |
| 1325 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1326 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1327 | NameOfXMMRegister(regop), |
| 1328 | NameOfCPURegister(rm), |
| 1329 | static_cast<int>(imm8)); |
| 1330 | data += 2; |
| 1331 | } else { |
| 1332 | UnimplementedInstruction(); |
| 1333 | } |
| 1334 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1335 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
| 1336 | data++; |
| 1337 | int mod, regop, rm; |
| 1338 | get_modrm(*data, &mod, ®op, &rm); |
| 1339 | if (mod == 0x3) { |
| 1340 | AppendToBuffer("%s %s,%s", mnem, |
| 1341 | NameOfXMMRegister(regop), |
| 1342 | NameOfXMMRegister(rm)); |
| 1343 | data++; |
| 1344 | } else { |
| 1345 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1346 | data += PrintRightOperand(data); |
| 1347 | } |
| 1348 | } else if (*data == 0x50) { |
| 1349 | data++; |
| 1350 | int mod, regop, rm; |
| 1351 | get_modrm(*data, &mod, ®op, &rm); |
| 1352 | AppendToBuffer("movmskpd %s,%s", |
| 1353 | NameOfCPURegister(regop), |
| 1354 | NameOfXMMRegister(rm)); |
| 1355 | data++; |
| 1356 | } else if (*data == 0x54) { |
| 1357 | data++; |
| 1358 | int mod, regop, rm; |
| 1359 | get_modrm(*data, &mod, ®op, &rm); |
| 1360 | AppendToBuffer("andpd %s,%s", |
| 1361 | NameOfXMMRegister(regop), |
| 1362 | NameOfXMMRegister(rm)); |
| 1363 | data++; |
| 1364 | } else if (*data == 0x56) { |
| 1365 | data++; |
| 1366 | int mod, regop, rm; |
| 1367 | get_modrm(*data, &mod, ®op, &rm); |
| 1368 | AppendToBuffer("orpd %s,%s", |
| 1369 | NameOfXMMRegister(regop), |
| 1370 | NameOfXMMRegister(rm)); |
| 1371 | data++; |
| 1372 | } else if (*data == 0x57) { |
| 1373 | data++; |
| 1374 | int mod, regop, rm; |
| 1375 | get_modrm(*data, &mod, ®op, &rm); |
| 1376 | AppendToBuffer("xorpd %s,%s", |
| 1377 | NameOfXMMRegister(regop), |
| 1378 | NameOfXMMRegister(rm)); |
| 1379 | data++; |
| 1380 | } else if (*data == 0x6E) { |
| 1381 | data++; |
| 1382 | int mod, regop, rm; |
| 1383 | get_modrm(*data, &mod, ®op, &rm); |
| 1384 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1385 | data += PrintRightOperand(data); |
| 1386 | } else if (*data == 0x6F) { |
| 1387 | data++; |
| 1388 | int mod, regop, rm; |
| 1389 | get_modrm(*data, &mod, ®op, &rm); |
| 1390 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
| 1391 | data += PrintRightXMMOperand(data); |
| 1392 | } else if (*data == 0x70) { |
| 1393 | data++; |
| 1394 | int mod, regop, rm; |
| 1395 | get_modrm(*data, &mod, ®op, &rm); |
| 1396 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1397 | AppendToBuffer("pshufd %s,%s,%d", |
| 1398 | NameOfXMMRegister(regop), |
| 1399 | NameOfXMMRegister(rm), |
| 1400 | static_cast<int>(imm8)); |
| 1401 | data += 2; |
| 1402 | } else if (*data == 0x76) { |
| 1403 | data++; |
| 1404 | int mod, regop, rm; |
| 1405 | get_modrm(*data, &mod, ®op, &rm); |
| 1406 | AppendToBuffer("pcmpeqd %s,%s", |
| 1407 | NameOfXMMRegister(regop), |
| 1408 | NameOfXMMRegister(rm)); |
| 1409 | data++; |
| 1410 | } else if (*data == 0x90) { |
| 1411 | data++; |
| 1412 | AppendToBuffer("nop"); // 2 byte nop. |
| 1413 | } else if (*data == 0xF3) { |
| 1414 | data++; |
| 1415 | int mod, regop, rm; |
| 1416 | get_modrm(*data, &mod, ®op, &rm); |
| 1417 | AppendToBuffer("psllq %s,%s", |
| 1418 | NameOfXMMRegister(regop), |
| 1419 | NameOfXMMRegister(rm)); |
| 1420 | data++; |
| 1421 | } else if (*data == 0x73) { |
| 1422 | data++; |
| 1423 | int mod, regop, rm; |
| 1424 | get_modrm(*data, &mod, ®op, &rm); |
| 1425 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1426 | DCHECK(regop == esi || regop == edx); |
| 1427 | AppendToBuffer("%s %s,%d", |
| 1428 | (regop == esi) ? "psllq" : "psrlq", |
| 1429 | NameOfXMMRegister(rm), |
| 1430 | static_cast<int>(imm8)); |
| 1431 | data += 2; |
| 1432 | } else if (*data == 0xD3) { |
| 1433 | data++; |
| 1434 | int mod, regop, rm; |
| 1435 | get_modrm(*data, &mod, ®op, &rm); |
| 1436 | AppendToBuffer("psrlq %s,%s", |
| 1437 | NameOfXMMRegister(regop), |
| 1438 | NameOfXMMRegister(rm)); |
| 1439 | data++; |
| 1440 | } else if (*data == 0x7F) { |
| 1441 | AppendToBuffer("movdqa "); |
| 1442 | data++; |
| 1443 | int mod, regop, rm; |
| 1444 | get_modrm(*data, &mod, ®op, &rm); |
| 1445 | data += PrintRightXMMOperand(data); |
| 1446 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1447 | } else if (*data == 0x7E) { |
| 1448 | data++; |
| 1449 | int mod, regop, rm; |
| 1450 | get_modrm(*data, &mod, ®op, &rm); |
| 1451 | AppendToBuffer("movd "); |
| 1452 | data += PrintRightOperand(data); |
| 1453 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1454 | } else if (*data == 0xDB) { |
| 1455 | data++; |
| 1456 | int mod, regop, rm; |
| 1457 | get_modrm(*data, &mod, ®op, &rm); |
| 1458 | AppendToBuffer("pand %s,%s", |
| 1459 | NameOfXMMRegister(regop), |
| 1460 | NameOfXMMRegister(rm)); |
| 1461 | data++; |
| 1462 | } else if (*data == 0xE7) { |
| 1463 | data++; |
| 1464 | int mod, regop, rm; |
| 1465 | get_modrm(*data, &mod, ®op, &rm); |
| 1466 | if (mod == 3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1467 | // movntdq |
| 1468 | UnimplementedInstruction(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1469 | } else { |
| 1470 | UnimplementedInstruction(); |
| 1471 | } |
| 1472 | } else if (*data == 0xEF) { |
| 1473 | data++; |
| 1474 | int mod, regop, rm; |
| 1475 | get_modrm(*data, &mod, ®op, &rm); |
| 1476 | AppendToBuffer("pxor %s,%s", |
| 1477 | NameOfXMMRegister(regop), |
| 1478 | NameOfXMMRegister(rm)); |
| 1479 | data++; |
| 1480 | } else if (*data == 0xEB) { |
| 1481 | data++; |
| 1482 | int mod, regop, rm; |
| 1483 | get_modrm(*data, &mod, ®op, &rm); |
| 1484 | AppendToBuffer("por %s,%s", |
| 1485 | NameOfXMMRegister(regop), |
| 1486 | NameOfXMMRegister(rm)); |
| 1487 | data++; |
| 1488 | } else { |
| 1489 | UnimplementedInstruction(); |
| 1490 | } |
| 1491 | } else { |
| 1492 | UnimplementedInstruction(); |
| 1493 | } |
| 1494 | break; |
| 1495 | |
| 1496 | case 0xFE: |
| 1497 | { data++; |
| 1498 | int mod, regop, rm; |
| 1499 | get_modrm(*data, &mod, ®op, &rm); |
| 1500 | if (regop == ecx) { |
| 1501 | AppendToBuffer("dec_b "); |
| 1502 | data += PrintRightOperand(data); |
| 1503 | } else { |
| 1504 | UnimplementedInstruction(); |
| 1505 | } |
| 1506 | } |
| 1507 | break; |
| 1508 | |
| 1509 | case 0x68: |
| 1510 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1511 | data += 5; |
| 1512 | break; |
| 1513 | |
| 1514 | case 0x6A: |
| 1515 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1516 | data += 2; |
| 1517 | break; |
| 1518 | |
| 1519 | case 0xA8: |
| 1520 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1521 | data += 2; |
| 1522 | break; |
| 1523 | |
| 1524 | case 0xA9: |
| 1525 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1526 | data += 5; |
| 1527 | break; |
| 1528 | |
| 1529 | case 0xD1: // fall through |
| 1530 | case 0xD3: // fall through |
| 1531 | case 0xC1: |
| 1532 | data += D1D3C1Instruction(data); |
| 1533 | break; |
| 1534 | |
| 1535 | case 0xD8: // fall through |
| 1536 | case 0xD9: // fall through |
| 1537 | case 0xDA: // fall through |
| 1538 | case 0xDB: // fall through |
| 1539 | case 0xDC: // fall through |
| 1540 | case 0xDD: // fall through |
| 1541 | case 0xDE: // fall through |
| 1542 | case 0xDF: |
| 1543 | data += FPUInstruction(data); |
| 1544 | break; |
| 1545 | |
| 1546 | case 0xEB: |
| 1547 | data += JumpShort(data); |
| 1548 | break; |
| 1549 | |
| 1550 | case 0xF2: |
| 1551 | if (*(data+1) == 0x0F) { |
| 1552 | byte b2 = *(data+2); |
| 1553 | if (b2 == 0x11) { |
| 1554 | AppendToBuffer("movsd "); |
| 1555 | data += 3; |
| 1556 | int mod, regop, rm; |
| 1557 | get_modrm(*data, &mod, ®op, &rm); |
| 1558 | data += PrintRightXMMOperand(data); |
| 1559 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1560 | } else if (b2 == 0x10) { |
| 1561 | data += 3; |
| 1562 | int mod, regop, rm; |
| 1563 | get_modrm(*data, &mod, ®op, &rm); |
| 1564 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
| 1565 | data += PrintRightXMMOperand(data); |
| 1566 | } else if (b2 == 0x5A) { |
| 1567 | data += 3; |
| 1568 | int mod, regop, rm; |
| 1569 | get_modrm(*data, &mod, ®op, &rm); |
| 1570 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 1571 | data += PrintRightXMMOperand(data); |
| 1572 | } else { |
| 1573 | const char* mnem = "?"; |
| 1574 | switch (b2) { |
| 1575 | case 0x2A: mnem = "cvtsi2sd"; break; |
| 1576 | case 0x2C: mnem = "cvttsd2si"; break; |
| 1577 | case 0x2D: mnem = "cvtsd2si"; break; |
| 1578 | case 0x51: mnem = "sqrtsd"; break; |
| 1579 | case 0x58: mnem = "addsd"; break; |
| 1580 | case 0x59: mnem = "mulsd"; break; |
| 1581 | case 0x5C: mnem = "subsd"; break; |
| 1582 | case 0x5E: mnem = "divsd"; break; |
| 1583 | } |
| 1584 | data += 3; |
| 1585 | int mod, regop, rm; |
| 1586 | get_modrm(*data, &mod, ®op, &rm); |
| 1587 | if (b2 == 0x2A) { |
| 1588 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1589 | data += PrintRightOperand(data); |
| 1590 | } else if (b2 == 0x2C || b2 == 0x2D) { |
| 1591 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 1592 | data += PrintRightXMMOperand(data); |
| 1593 | } else if (b2 == 0xC2) { |
| 1594 | // Intel manual 2A, Table 3-18. |
| 1595 | const char* const pseudo_op[] = { |
| 1596 | "cmpeqsd", |
| 1597 | "cmpltsd", |
| 1598 | "cmplesd", |
| 1599 | "cmpunordsd", |
| 1600 | "cmpneqsd", |
| 1601 | "cmpnltsd", |
| 1602 | "cmpnlesd", |
| 1603 | "cmpordsd" |
| 1604 | }; |
| 1605 | AppendToBuffer("%s %s,%s", |
| 1606 | pseudo_op[data[1]], |
| 1607 | NameOfXMMRegister(regop), |
| 1608 | NameOfXMMRegister(rm)); |
| 1609 | data += 2; |
| 1610 | } else { |
| 1611 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1612 | data += PrintRightXMMOperand(data); |
| 1613 | } |
| 1614 | } |
| 1615 | } else { |
| 1616 | UnimplementedInstruction(); |
| 1617 | } |
| 1618 | break; |
| 1619 | |
| 1620 | case 0xF3: |
| 1621 | if (*(data+1) == 0x0F) { |
| 1622 | byte b2 = *(data+2); |
| 1623 | if (b2 == 0x11) { |
| 1624 | AppendToBuffer("movss "); |
| 1625 | data += 3; |
| 1626 | int mod, regop, rm; |
| 1627 | get_modrm(*data, &mod, ®op, &rm); |
| 1628 | data += PrintRightXMMOperand(data); |
| 1629 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1630 | } else if (b2 == 0x10) { |
| 1631 | data += 3; |
| 1632 | int mod, regop, rm; |
| 1633 | get_modrm(*data, &mod, ®op, &rm); |
| 1634 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 1635 | data += PrintRightXMMOperand(data); |
| 1636 | } else if (b2 == 0x2C) { |
| 1637 | data += 3; |
| 1638 | int mod, regop, rm; |
| 1639 | get_modrm(*data, &mod, ®op, &rm); |
| 1640 | AppendToBuffer("cvttss2si %s,", NameOfCPURegister(regop)); |
| 1641 | data += PrintRightXMMOperand(data); |
| 1642 | } else if (b2 == 0x5A) { |
| 1643 | data += 3; |
| 1644 | int mod, regop, rm; |
| 1645 | get_modrm(*data, &mod, ®op, &rm); |
| 1646 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 1647 | data += PrintRightXMMOperand(data); |
| 1648 | } else if (b2 == 0x6F) { |
| 1649 | data += 3; |
| 1650 | int mod, regop, rm; |
| 1651 | get_modrm(*data, &mod, ®op, &rm); |
| 1652 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
| 1653 | data += PrintRightXMMOperand(data); |
| 1654 | } else if (b2 == 0x7F) { |
| 1655 | AppendToBuffer("movdqu "); |
| 1656 | data += 3; |
| 1657 | int mod, regop, rm; |
| 1658 | get_modrm(*data, &mod, ®op, &rm); |
| 1659 | data += PrintRightXMMOperand(data); |
| 1660 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1661 | } else { |
| 1662 | UnimplementedInstruction(); |
| 1663 | } |
| 1664 | } else if (*(data+1) == 0xA5) { |
| 1665 | data += 2; |
| 1666 | AppendToBuffer("rep_movs"); |
| 1667 | } else if (*(data+1) == 0xAB) { |
| 1668 | data += 2; |
| 1669 | AppendToBuffer("rep_stos"); |
| 1670 | } else { |
| 1671 | UnimplementedInstruction(); |
| 1672 | } |
| 1673 | break; |
| 1674 | |
| 1675 | case 0xF7: |
| 1676 | data += F7Instruction(data); |
| 1677 | break; |
| 1678 | |
| 1679 | default: |
| 1680 | UnimplementedInstruction(); |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 1685 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 1686 | } |
| 1687 | |
| 1688 | int instr_len = data - instr; |
| 1689 | if (instr_len == 0) { |
| 1690 | printf("%02x", *data); |
| 1691 | } |
| 1692 | DCHECK(instr_len > 0); // Ensure progress. |
| 1693 | |
| 1694 | int outp = 0; |
| 1695 | // Instruction bytes. |
| 1696 | for (byte* bp = instr; bp < data; bp++) { |
| 1697 | outp += v8::internal::SNPrintF(out_buffer + outp, "%02x", *bp); |
| 1698 | } |
| 1699 | for (int i = 6 - instr_len; i >= 0; i--) { |
| 1700 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
| 1701 | } |
| 1702 | |
| 1703 | outp += v8::internal::SNPrintF(out_buffer + outp, " %s", tmp_buffer_.start()); |
| 1704 | return instr_len; |
| 1705 | } // NOLINT (function is too long) |
| 1706 | |
| 1707 | |
| 1708 | //------------------------------------------------------------------------------ |
| 1709 | |
| 1710 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1711 | static const char* const cpu_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1712 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 1713 | }; |
| 1714 | |
| 1715 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1716 | static const char* const byte_cpu_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1717 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 1718 | }; |
| 1719 | |
| 1720 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1721 | static const char* const xmm_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1722 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 1723 | }; |
| 1724 | |
| 1725 | |
| 1726 | const char* NameConverter::NameOfAddress(byte* addr) const { |
| 1727 | v8::internal::SNPrintF(tmp_buffer_, "%p", addr); |
| 1728 | return tmp_buffer_.start(); |
| 1729 | } |
| 1730 | |
| 1731 | |
| 1732 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 1733 | return NameOfAddress(addr); |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 1738 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 1739 | return "noreg"; |
| 1740 | } |
| 1741 | |
| 1742 | |
| 1743 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 1744 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 1745 | return "noreg"; |
| 1746 | } |
| 1747 | |
| 1748 | |
| 1749 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 1750 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 1751 | return "noxmmreg"; |
| 1752 | } |
| 1753 | |
| 1754 | |
| 1755 | const char* NameConverter::NameInCode(byte* addr) const { |
| 1756 | // X87 does not embed debug strings at the moment. |
| 1757 | UNREACHABLE(); |
| 1758 | return ""; |
| 1759 | } |
| 1760 | |
| 1761 | |
| 1762 | //------------------------------------------------------------------------------ |
| 1763 | |
| 1764 | Disassembler::Disassembler(const NameConverter& converter) |
| 1765 | : converter_(converter) {} |
| 1766 | |
| 1767 | |
| 1768 | Disassembler::~Disassembler() {} |
| 1769 | |
| 1770 | |
| 1771 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 1772 | byte* instruction) { |
| 1773 | DisassemblerX87 d(converter_, false /*do not crash if unimplemented*/); |
| 1774 | return d.InstructionDecode(buffer, instruction); |
| 1775 | } |
| 1776 | |
| 1777 | |
| 1778 | // The IA-32 assembler does not currently use constant pools. |
| 1779 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 1780 | |
| 1781 | |
| 1782 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 1783 | NameConverter converter; |
| 1784 | Disassembler d(converter); |
| 1785 | for (byte* pc = begin; pc < end;) { |
| 1786 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 1787 | buffer[0] = '\0'; |
| 1788 | byte* prev_pc = pc; |
| 1789 | pc += d.InstructionDecode(buffer, pc); |
| 1790 | fprintf(f, "%p", prev_pc); |
| 1791 | fprintf(f, " "); |
| 1792 | |
| 1793 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 1794 | fprintf(f, "%02x", *bp); |
| 1795 | } |
| 1796 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 1797 | fprintf(f, " "); |
| 1798 | } |
| 1799 | fprintf(f, " %s\n", buffer.start()); |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | |
| 1804 | } // namespace disasm |
| 1805 | |
| 1806 | #endif // V8_TARGET_ARCH_X87 |