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 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 11 | #include "src/base/compiler-specific.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 12 | #include "src/disasm.h" |
| 13 | |
| 14 | namespace disasm { |
| 15 | |
| 16 | enum OperandOrder { |
| 17 | UNSET_OP_ORDER = 0, |
| 18 | REG_OPER_OP_ORDER, |
| 19 | OPER_REG_OP_ORDER |
| 20 | }; |
| 21 | |
| 22 | |
| 23 | //------------------------------------------------------------------ |
| 24 | // Tables |
| 25 | //------------------------------------------------------------------ |
| 26 | struct ByteMnemonic { |
| 27 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 28 | const char* mnem; |
| 29 | OperandOrder op_order_; |
| 30 | }; |
| 31 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 32 | static const ByteMnemonic two_operands_instr[] = { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 33 | {0x01, "add", OPER_REG_OP_ORDER}, {0x03, "add", REG_OPER_OP_ORDER}, |
| 34 | {0x09, "or", OPER_REG_OP_ORDER}, {0x0B, "or", REG_OPER_OP_ORDER}, |
| 35 | {0x13, "adc", REG_OPER_OP_ORDER}, {0x1B, "sbb", REG_OPER_OP_ORDER}, |
| 36 | {0x21, "and", OPER_REG_OP_ORDER}, {0x23, "and", REG_OPER_OP_ORDER}, |
| 37 | {0x29, "sub", OPER_REG_OP_ORDER}, {0x2A, "subb", REG_OPER_OP_ORDER}, |
| 38 | {0x2B, "sub", REG_OPER_OP_ORDER}, {0x31, "xor", OPER_REG_OP_ORDER}, |
| 39 | {0x33, "xor", REG_OPER_OP_ORDER}, {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 40 | {0x39, "cmp", OPER_REG_OP_ORDER}, {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 41 | {0x3B, "cmp", REG_OPER_OP_ORDER}, {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 42 | {0x85, "test", REG_OPER_OP_ORDER}, {0x86, "xchg_b", REG_OPER_OP_ORDER}, |
| 43 | {0x87, "xchg", REG_OPER_OP_ORDER}, {0x8A, "mov_b", REG_OPER_OP_ORDER}, |
| 44 | {0x8B, "mov", REG_OPER_OP_ORDER}, {0x8D, "lea", REG_OPER_OP_ORDER}, |
| 45 | {-1, "", UNSET_OP_ORDER}}; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | |
| 47 | static const ByteMnemonic zero_operands_instr[] = { |
| 48 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 49 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 50 | {0x90, "nop", UNSET_OP_ORDER}, |
| 51 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 52 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 53 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 54 | {0x61, "popad", UNSET_OP_ORDER}, |
| 55 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 56 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 57 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 58 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 59 | {0x9B, "fwait", UNSET_OP_ORDER}, |
| 60 | {0xFC, "cld", UNSET_OP_ORDER}, |
| 61 | {0xAB, "stos", UNSET_OP_ORDER}, |
| 62 | {-1, "", UNSET_OP_ORDER} |
| 63 | }; |
| 64 | |
| 65 | |
| 66 | static const ByteMnemonic call_jump_instr[] = { |
| 67 | {0xE8, "call", UNSET_OP_ORDER}, |
| 68 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 69 | {-1, "", UNSET_OP_ORDER} |
| 70 | }; |
| 71 | |
| 72 | |
| 73 | static const ByteMnemonic short_immediate_instr[] = { |
| 74 | {0x05, "add", UNSET_OP_ORDER}, |
| 75 | {0x0D, "or", UNSET_OP_ORDER}, |
| 76 | {0x15, "adc", UNSET_OP_ORDER}, |
| 77 | {0x25, "and", UNSET_OP_ORDER}, |
| 78 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 79 | {0x35, "xor", UNSET_OP_ORDER}, |
| 80 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 81 | {-1, "", UNSET_OP_ORDER} |
| 82 | }; |
| 83 | |
| 84 | |
| 85 | // Generally we don't want to generate these because they are subject to partial |
| 86 | // register stalls. They are included for completeness and because the cmp |
| 87 | // variant is used by the RecordWrite stub. Because it does not update the |
| 88 | // register it is not subject to partial register stalls. |
| 89 | static ByteMnemonic byte_immediate_instr[] = { |
| 90 | {0x0c, "or", UNSET_OP_ORDER}, |
| 91 | {0x24, "and", UNSET_OP_ORDER}, |
| 92 | {0x34, "xor", UNSET_OP_ORDER}, |
| 93 | {0x3c, "cmp", UNSET_OP_ORDER}, |
| 94 | {-1, "", UNSET_OP_ORDER} |
| 95 | }; |
| 96 | |
| 97 | |
| 98 | static const char* const jump_conditional_mnem[] = { |
| 99 | /*0*/ "jo", "jno", "jc", "jnc", |
| 100 | /*4*/ "jz", "jnz", "jna", "ja", |
| 101 | /*8*/ "js", "jns", "jpe", "jpo", |
| 102 | /*12*/ "jl", "jnl", "jng", "jg" |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | static const char* const set_conditional_mnem[] = { |
| 107 | /*0*/ "seto", "setno", "setc", "setnc", |
| 108 | /*4*/ "setz", "setnz", "setna", "seta", |
| 109 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 110 | /*12*/ "setl", "setnl", "setng", "setg" |
| 111 | }; |
| 112 | |
| 113 | |
| 114 | static const char* const conditional_move_mnem[] = { |
| 115 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 116 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 117 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 118 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 119 | }; |
| 120 | |
| 121 | |
| 122 | enum InstructionType { |
| 123 | NO_INSTR, |
| 124 | ZERO_OPERANDS_INSTR, |
| 125 | TWO_OPERANDS_INSTR, |
| 126 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 127 | REGISTER_INSTR, |
| 128 | MOVE_REG_INSTR, |
| 129 | CALL_JUMP_INSTR, |
| 130 | SHORT_IMMEDIATE_INSTR, |
| 131 | BYTE_IMMEDIATE_INSTR |
| 132 | }; |
| 133 | |
| 134 | |
| 135 | struct InstructionDesc { |
| 136 | const char* mnem; |
| 137 | InstructionType type; |
| 138 | OperandOrder op_order_; |
| 139 | }; |
| 140 | |
| 141 | |
| 142 | class InstructionTable { |
| 143 | public: |
| 144 | InstructionTable(); |
| 145 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
| 146 | static InstructionTable* get_instance() { |
| 147 | static InstructionTable table; |
| 148 | return &table; |
| 149 | } |
| 150 | |
| 151 | private: |
| 152 | InstructionDesc instructions_[256]; |
| 153 | void Clear(); |
| 154 | void Init(); |
| 155 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
| 156 | void SetTableRange(InstructionType type, |
| 157 | byte start, |
| 158 | byte end, |
| 159 | const char* mnem); |
| 160 | void AddJumpConditionalShort(); |
| 161 | }; |
| 162 | |
| 163 | |
| 164 | InstructionTable::InstructionTable() { |
| 165 | Clear(); |
| 166 | Init(); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | void InstructionTable::Clear() { |
| 171 | for (int i = 0; i < 256; i++) { |
| 172 | instructions_[i].mnem = ""; |
| 173 | instructions_[i].type = NO_INSTR; |
| 174 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | |
| 179 | void InstructionTable::Init() { |
| 180 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 181 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 182 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 183 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
| 184 | CopyTable(byte_immediate_instr, BYTE_IMMEDIATE_INSTR); |
| 185 | AddJumpConditionalShort(); |
| 186 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 187 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 188 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 189 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 190 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 191 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 192 | } |
| 193 | |
| 194 | |
| 195 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 196 | InstructionType type) { |
| 197 | for (int i = 0; bm[i].b >= 0; i++) { |
| 198 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 199 | id->mnem = bm[i].mnem; |
| 200 | id->op_order_ = bm[i].op_order_; |
| 201 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 202 | id->type = type; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | |
| 207 | void InstructionTable::SetTableRange(InstructionType type, |
| 208 | byte start, |
| 209 | byte end, |
| 210 | const char* mnem) { |
| 211 | for (byte b = start; b <= end; b++) { |
| 212 | InstructionDesc* id = &instructions_[b]; |
| 213 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 214 | id->mnem = mnem; |
| 215 | id->type = type; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | |
| 220 | void InstructionTable::AddJumpConditionalShort() { |
| 221 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 222 | InstructionDesc* id = &instructions_[b]; |
| 223 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
| 224 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 225 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | |
| 230 | // The X87 disassembler implementation. |
| 231 | class DisassemblerX87 { |
| 232 | public: |
| 233 | DisassemblerX87(const NameConverter& converter, |
| 234 | bool abort_on_unimplemented = true) |
| 235 | : converter_(converter), |
| 236 | instruction_table_(InstructionTable::get_instance()), |
| 237 | tmp_buffer_pos_(0), |
| 238 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 239 | tmp_buffer_[0] = '\0'; |
| 240 | } |
| 241 | |
| 242 | virtual ~DisassemblerX87() {} |
| 243 | |
| 244 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 245 | // Returns the length of the disassembled machine instruction in bytes. |
| 246 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 247 | |
| 248 | private: |
| 249 | const NameConverter& converter_; |
| 250 | InstructionTable* instruction_table_; |
| 251 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 252 | unsigned int tmp_buffer_pos_; |
| 253 | bool abort_on_unimplemented_; |
| 254 | |
| 255 | enum { |
| 256 | eax = 0, |
| 257 | ecx = 1, |
| 258 | edx = 2, |
| 259 | ebx = 3, |
| 260 | esp = 4, |
| 261 | ebp = 5, |
| 262 | esi = 6, |
| 263 | edi = 7 |
| 264 | }; |
| 265 | |
| 266 | |
| 267 | enum ShiftOpcodeExtension { |
| 268 | kROL = 0, |
| 269 | kROR = 1, |
| 270 | kRCL = 2, |
| 271 | kRCR = 3, |
| 272 | kSHL = 4, |
| 273 | KSHR = 5, |
| 274 | kSAR = 7 |
| 275 | }; |
| 276 | |
| 277 | |
| 278 | const char* NameOfCPURegister(int reg) const { |
| 279 | return converter_.NameOfCPURegister(reg); |
| 280 | } |
| 281 | |
| 282 | |
| 283 | const char* NameOfByteCPURegister(int reg) const { |
| 284 | return converter_.NameOfByteCPURegister(reg); |
| 285 | } |
| 286 | |
| 287 | |
| 288 | const char* NameOfXMMRegister(int reg) const { |
| 289 | return converter_.NameOfXMMRegister(reg); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | const char* NameOfAddress(byte* addr) const { |
| 294 | return converter_.NameOfAddress(addr); |
| 295 | } |
| 296 | |
| 297 | |
| 298 | // Disassembler helper functions. |
| 299 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 300 | *mod = (data >> 6) & 3; |
| 301 | *regop = (data & 0x38) >> 3; |
| 302 | *rm = data & 7; |
| 303 | } |
| 304 | |
| 305 | |
| 306 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 307 | *scale = (data >> 6) & 3; |
| 308 | *index = (data >> 3) & 7; |
| 309 | *base = data & 7; |
| 310 | } |
| 311 | |
| 312 | typedef const char* (DisassemblerX87::*RegisterNameMapping)(int reg) const; |
| 313 | |
| 314 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 315 | int PrintRightOperand(byte* modrmp); |
| 316 | int PrintRightByteOperand(byte* modrmp); |
| 317 | int PrintRightXMMOperand(byte* modrmp); |
| 318 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 319 | int PrintImmediateOp(byte* data); |
| 320 | int F7Instruction(byte* data); |
| 321 | int D1D3C1Instruction(byte* data); |
| 322 | int JumpShort(byte* data); |
| 323 | int JumpConditional(byte* data, const char* comment); |
| 324 | int JumpConditionalShort(byte* data, const char* comment); |
| 325 | int SetCC(byte* data); |
| 326 | int CMov(byte* data); |
| 327 | int FPUInstruction(byte* data); |
| 328 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 329 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 330 | PRINTF_FORMAT(2, 3) void AppendToBuffer(const char* format, ...); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 331 | |
| 332 | void UnimplementedInstruction() { |
| 333 | if (abort_on_unimplemented_) { |
| 334 | UNIMPLEMENTED(); |
| 335 | } else { |
| 336 | AppendToBuffer("'Unimplemented Instruction'"); |
| 337 | } |
| 338 | } |
| 339 | }; |
| 340 | |
| 341 | |
| 342 | void DisassemblerX87::AppendToBuffer(const char* format, ...) { |
| 343 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 344 | va_list args; |
| 345 | va_start(args, format); |
| 346 | int result = v8::internal::VSNPrintF(buf, format, args); |
| 347 | va_end(args); |
| 348 | tmp_buffer_pos_ += result; |
| 349 | } |
| 350 | |
| 351 | int DisassemblerX87::PrintRightOperandHelper( |
| 352 | byte* modrmp, |
| 353 | RegisterNameMapping direct_register_name) { |
| 354 | int mod, regop, rm; |
| 355 | get_modrm(*modrmp, &mod, ®op, &rm); |
| 356 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 357 | &DisassemblerX87::NameOfCPURegister; |
| 358 | switch (mod) { |
| 359 | case 0: |
| 360 | if (rm == ebp) { |
| 361 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 362 | AppendToBuffer("[0x%x]", disp); |
| 363 | return 5; |
| 364 | } else if (rm == esp) { |
| 365 | byte sib = *(modrmp + 1); |
| 366 | int scale, index, base; |
| 367 | get_sib(sib, &scale, &index, &base); |
| 368 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 369 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 370 | return 2; |
| 371 | } else if (base == ebp) { |
| 372 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
| 373 | AppendToBuffer("[%s*%d%s0x%x]", |
| 374 | (this->*register_name)(index), |
| 375 | 1 << scale, |
| 376 | disp < 0 ? "-" : "+", |
| 377 | disp < 0 ? -disp : disp); |
| 378 | return 6; |
| 379 | } else if (index != esp && base != ebp) { |
| 380 | // [base+index*scale] |
| 381 | AppendToBuffer("[%s+%s*%d]", |
| 382 | (this->*register_name)(base), |
| 383 | (this->*register_name)(index), |
| 384 | 1 << scale); |
| 385 | return 2; |
| 386 | } else { |
| 387 | UnimplementedInstruction(); |
| 388 | return 1; |
| 389 | } |
| 390 | } else { |
| 391 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 392 | return 1; |
| 393 | } |
| 394 | break; |
| 395 | case 1: // fall through |
| 396 | case 2: |
| 397 | if (rm == esp) { |
| 398 | byte sib = *(modrmp + 1); |
| 399 | int scale, index, base; |
| 400 | get_sib(sib, &scale, &index, &base); |
| 401 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) |
| 402 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
| 403 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
| 404 | AppendToBuffer("[%s%s0x%x]", |
| 405 | (this->*register_name)(rm), |
| 406 | disp < 0 ? "-" : "+", |
| 407 | disp < 0 ? -disp : disp); |
| 408 | } else { |
| 409 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
| 410 | (this->*register_name)(base), |
| 411 | (this->*register_name)(index), |
| 412 | 1 << scale, |
| 413 | disp < 0 ? "-" : "+", |
| 414 | disp < 0 ? -disp : disp); |
| 415 | } |
| 416 | return mod == 2 ? 6 : 3; |
| 417 | } else { |
| 418 | // No sib. |
| 419 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) |
| 420 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 421 | AppendToBuffer("[%s%s0x%x]", |
| 422 | (this->*register_name)(rm), |
| 423 | disp < 0 ? "-" : "+", |
| 424 | disp < 0 ? -disp : disp); |
| 425 | return mod == 2 ? 5 : 2; |
| 426 | } |
| 427 | break; |
| 428 | case 3: |
| 429 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 430 | return 1; |
| 431 | default: |
| 432 | UnimplementedInstruction(); |
| 433 | return 1; |
| 434 | } |
| 435 | UNREACHABLE(); |
| 436 | } |
| 437 | |
| 438 | |
| 439 | int DisassemblerX87::PrintRightOperand(byte* modrmp) { |
| 440 | return PrintRightOperandHelper(modrmp, &DisassemblerX87::NameOfCPURegister); |
| 441 | } |
| 442 | |
| 443 | |
| 444 | int DisassemblerX87::PrintRightByteOperand(byte* modrmp) { |
| 445 | return PrintRightOperandHelper(modrmp, |
| 446 | &DisassemblerX87::NameOfByteCPURegister); |
| 447 | } |
| 448 | |
| 449 | |
| 450 | int DisassemblerX87::PrintRightXMMOperand(byte* modrmp) { |
| 451 | return PrintRightOperandHelper(modrmp, |
| 452 | &DisassemblerX87::NameOfXMMRegister); |
| 453 | } |
| 454 | |
| 455 | |
| 456 | // Returns number of bytes used including the current *data. |
| 457 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 458 | int DisassemblerX87::PrintOperands(const char* mnem, |
| 459 | OperandOrder op_order, |
| 460 | byte* data) { |
| 461 | byte modrm = *data; |
| 462 | int mod, regop, rm; |
| 463 | get_modrm(modrm, &mod, ®op, &rm); |
| 464 | int advance = 0; |
| 465 | switch (op_order) { |
| 466 | case REG_OPER_OP_ORDER: { |
| 467 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 468 | advance = PrintRightOperand(data); |
| 469 | break; |
| 470 | } |
| 471 | case OPER_REG_OP_ORDER: { |
| 472 | AppendToBuffer("%s ", mnem); |
| 473 | advance = PrintRightOperand(data); |
| 474 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 475 | break; |
| 476 | } |
| 477 | default: |
| 478 | UNREACHABLE(); |
| 479 | break; |
| 480 | } |
| 481 | return advance; |
| 482 | } |
| 483 | |
| 484 | |
| 485 | // Returns number of bytes used by machine instruction, including *data byte. |
| 486 | // Writes immediate instructions to 'tmp_buffer_'. |
| 487 | int DisassemblerX87::PrintImmediateOp(byte* data) { |
| 488 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 489 | byte modrm = *(data+1); |
| 490 | int mod, regop, rm; |
| 491 | get_modrm(modrm, &mod, ®op, &rm); |
| 492 | const char* mnem = "Imm???"; |
| 493 | switch (regop) { |
| 494 | case 0: mnem = "add"; break; |
| 495 | case 1: mnem = "or"; break; |
| 496 | case 2: mnem = "adc"; break; |
| 497 | case 4: mnem = "and"; break; |
| 498 | case 5: mnem = "sub"; break; |
| 499 | case 6: mnem = "xor"; break; |
| 500 | case 7: mnem = "cmp"; break; |
| 501 | default: UnimplementedInstruction(); |
| 502 | } |
| 503 | AppendToBuffer("%s ", mnem); |
| 504 | int count = PrintRightOperand(data+1); |
| 505 | if (sign_extension_bit) { |
| 506 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 507 | return 1 + count + 1 /*int8*/; |
| 508 | } else { |
| 509 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 510 | return 1 + count + 4 /*int32_t*/; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | |
| 515 | // Returns number of bytes used, including *data. |
| 516 | int DisassemblerX87::F7Instruction(byte* data) { |
| 517 | DCHECK_EQ(0xF7, *data); |
| 518 | byte modrm = *++data; |
| 519 | int mod, regop, rm; |
| 520 | get_modrm(modrm, &mod, ®op, &rm); |
| 521 | const char* mnem = NULL; |
| 522 | switch (regop) { |
| 523 | case 0: |
| 524 | mnem = "test"; |
| 525 | break; |
| 526 | case 2: |
| 527 | mnem = "not"; |
| 528 | break; |
| 529 | case 3: |
| 530 | mnem = "neg"; |
| 531 | break; |
| 532 | case 4: |
| 533 | mnem = "mul"; |
| 534 | break; |
| 535 | case 5: |
| 536 | mnem = "imul"; |
| 537 | break; |
| 538 | case 6: |
| 539 | mnem = "div"; |
| 540 | break; |
| 541 | case 7: |
| 542 | mnem = "idiv"; |
| 543 | break; |
| 544 | default: |
| 545 | UnimplementedInstruction(); |
| 546 | } |
| 547 | AppendToBuffer("%s ", mnem); |
| 548 | int count = PrintRightOperand(data); |
| 549 | if (regop == 0) { |
| 550 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + count)); |
| 551 | count += 4; |
| 552 | } |
| 553 | return 1 + count; |
| 554 | } |
| 555 | |
| 556 | |
| 557 | int DisassemblerX87::D1D3C1Instruction(byte* data) { |
| 558 | byte op = *data; |
| 559 | DCHECK(op == 0xD1 || op == 0xD3 || op == 0xC1); |
| 560 | byte modrm = *++data; |
| 561 | int mod, regop, rm; |
| 562 | get_modrm(modrm, &mod, ®op, &rm); |
| 563 | int imm8 = -1; |
| 564 | const char* mnem = NULL; |
| 565 | switch (regop) { |
| 566 | case kROL: |
| 567 | mnem = "rol"; |
| 568 | break; |
| 569 | case kROR: |
| 570 | mnem = "ror"; |
| 571 | break; |
| 572 | case kRCL: |
| 573 | mnem = "rcl"; |
| 574 | break; |
| 575 | case kRCR: |
| 576 | mnem = "rcr"; |
| 577 | break; |
| 578 | case kSHL: |
| 579 | mnem = "shl"; |
| 580 | break; |
| 581 | case KSHR: |
| 582 | mnem = "shr"; |
| 583 | break; |
| 584 | case kSAR: |
| 585 | mnem = "sar"; |
| 586 | break; |
| 587 | default: |
| 588 | UnimplementedInstruction(); |
| 589 | } |
| 590 | AppendToBuffer("%s ", mnem); |
| 591 | int count = PrintRightOperand(data); |
| 592 | if (op == 0xD1) { |
| 593 | imm8 = 1; |
| 594 | } else if (op == 0xC1) { |
| 595 | imm8 = *(data + 1); |
| 596 | count++; |
| 597 | } else if (op == 0xD3) { |
| 598 | // Shift/rotate by cl. |
| 599 | } |
| 600 | if (imm8 >= 0) { |
| 601 | AppendToBuffer(",%d", imm8); |
| 602 | } else { |
| 603 | AppendToBuffer(",cl"); |
| 604 | } |
| 605 | return 1 + count; |
| 606 | } |
| 607 | |
| 608 | |
| 609 | // Returns number of bytes used, including *data. |
| 610 | int DisassemblerX87::JumpShort(byte* data) { |
| 611 | DCHECK_EQ(0xEB, *data); |
| 612 | byte b = *(data+1); |
| 613 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 614 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 615 | return 2; |
| 616 | } |
| 617 | |
| 618 | |
| 619 | // Returns number of bytes used, including *data. |
| 620 | int DisassemblerX87::JumpConditional(byte* data, const char* comment) { |
| 621 | DCHECK_EQ(0x0F, *data); |
| 622 | byte cond = *(data+1) & 0x0F; |
| 623 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 624 | const char* mnem = jump_conditional_mnem[cond]; |
| 625 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 626 | if (comment != NULL) { |
| 627 | AppendToBuffer(", %s", comment); |
| 628 | } |
| 629 | return 6; // includes 0x0F |
| 630 | } |
| 631 | |
| 632 | |
| 633 | // Returns number of bytes used, including *data. |
| 634 | int DisassemblerX87::JumpConditionalShort(byte* data, const char* comment) { |
| 635 | byte cond = *data & 0x0F; |
| 636 | byte b = *(data+1); |
| 637 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 638 | const char* mnem = jump_conditional_mnem[cond]; |
| 639 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 640 | if (comment != NULL) { |
| 641 | AppendToBuffer(", %s", comment); |
| 642 | } |
| 643 | return 2; |
| 644 | } |
| 645 | |
| 646 | |
| 647 | // Returns number of bytes used, including *data. |
| 648 | int DisassemblerX87::SetCC(byte* data) { |
| 649 | DCHECK_EQ(0x0F, *data); |
| 650 | byte cond = *(data+1) & 0x0F; |
| 651 | const char* mnem = set_conditional_mnem[cond]; |
| 652 | AppendToBuffer("%s ", mnem); |
| 653 | PrintRightByteOperand(data+2); |
| 654 | return 3; // Includes 0x0F. |
| 655 | } |
| 656 | |
| 657 | |
| 658 | // Returns number of bytes used, including *data. |
| 659 | int DisassemblerX87::CMov(byte* data) { |
| 660 | DCHECK_EQ(0x0F, *data); |
| 661 | byte cond = *(data + 1) & 0x0F; |
| 662 | const char* mnem = conditional_move_mnem[cond]; |
| 663 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 664 | return 2 + op_size; // includes 0x0F |
| 665 | } |
| 666 | |
| 667 | |
| 668 | // Returns number of bytes used, including *data. |
| 669 | int DisassemblerX87::FPUInstruction(byte* data) { |
| 670 | byte escape_opcode = *data; |
| 671 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
| 672 | byte modrm_byte = *(data+1); |
| 673 | |
| 674 | if (modrm_byte >= 0xC0) { |
| 675 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 676 | } else { |
| 677 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
| 678 | } |
| 679 | } |
| 680 | |
| 681 | int DisassemblerX87::MemoryFPUInstruction(int escape_opcode, |
| 682 | int modrm_byte, |
| 683 | byte* modrm_start) { |
| 684 | const char* mnem = "?"; |
| 685 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 686 | switch (escape_opcode) { |
| 687 | case 0xD9: switch (regop) { |
| 688 | case 0: mnem = "fld_s"; break; |
| 689 | case 2: mnem = "fst_s"; break; |
| 690 | case 3: mnem = "fstp_s"; break; |
| 691 | case 5: |
| 692 | mnem = "fldcw"; |
| 693 | break; |
| 694 | case 7: |
| 695 | mnem = "fnstcw"; |
| 696 | break; |
| 697 | default: UnimplementedInstruction(); |
| 698 | } |
| 699 | break; |
| 700 | |
| 701 | case 0xDB: switch (regop) { |
| 702 | case 0: mnem = "fild_s"; break; |
| 703 | case 1: mnem = "fisttp_s"; break; |
| 704 | case 2: mnem = "fist_s"; break; |
| 705 | case 3: mnem = "fistp_s"; break; |
| 706 | default: UnimplementedInstruction(); |
| 707 | } |
| 708 | break; |
| 709 | |
| 710 | case 0xDC: |
| 711 | switch (regop) { |
| 712 | case 0: |
| 713 | mnem = "fadd_d"; |
| 714 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 715 | case 1: |
| 716 | mnem = "fmul_d"; |
| 717 | break; |
| 718 | case 4: |
| 719 | mnem = "fsub_d"; |
| 720 | break; |
| 721 | case 5: |
| 722 | mnem = "fsubr_d"; |
| 723 | break; |
| 724 | case 6: |
| 725 | mnem = "fdiv_d"; |
| 726 | break; |
| 727 | case 7: |
| 728 | mnem = "fdivr_d"; |
| 729 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 730 | default: |
| 731 | UnimplementedInstruction(); |
| 732 | } |
| 733 | break; |
| 734 | |
| 735 | case 0xDD: switch (regop) { |
| 736 | case 0: mnem = "fld_d"; break; |
| 737 | case 1: mnem = "fisttp_d"; break; |
| 738 | case 2: mnem = "fst_d"; break; |
| 739 | case 3: mnem = "fstp_d"; break; |
| 740 | case 4: |
| 741 | mnem = "frstor"; |
| 742 | break; |
| 743 | case 6: |
| 744 | mnem = "fnsave"; |
| 745 | break; |
| 746 | default: UnimplementedInstruction(); |
| 747 | } |
| 748 | break; |
| 749 | |
| 750 | case 0xDF: switch (regop) { |
| 751 | case 5: mnem = "fild_d"; break; |
| 752 | case 7: mnem = "fistp_d"; break; |
| 753 | default: UnimplementedInstruction(); |
| 754 | } |
| 755 | break; |
| 756 | |
| 757 | default: UnimplementedInstruction(); |
| 758 | } |
| 759 | AppendToBuffer("%s ", mnem); |
| 760 | int count = PrintRightOperand(modrm_start); |
| 761 | return count + 1; |
| 762 | } |
| 763 | |
| 764 | int DisassemblerX87::RegisterFPUInstruction(int escape_opcode, |
| 765 | byte modrm_byte) { |
| 766 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 767 | const char* mnem = "?"; |
| 768 | |
| 769 | switch (escape_opcode) { |
| 770 | case 0xD8: |
| 771 | has_register = true; |
| 772 | switch (modrm_byte & 0xF8) { |
| 773 | case 0xC0: mnem = "fadd_i"; break; |
| 774 | case 0xE0: mnem = "fsub_i"; break; |
| 775 | case 0xC8: mnem = "fmul_i"; break; |
| 776 | case 0xF0: mnem = "fdiv_i"; break; |
| 777 | default: UnimplementedInstruction(); |
| 778 | } |
| 779 | break; |
| 780 | |
| 781 | case 0xD9: |
| 782 | switch (modrm_byte & 0xF8) { |
| 783 | case 0xC0: |
| 784 | mnem = "fld"; |
| 785 | has_register = true; |
| 786 | break; |
| 787 | case 0xC8: |
| 788 | mnem = "fxch"; |
| 789 | has_register = true; |
| 790 | break; |
| 791 | default: |
| 792 | switch (modrm_byte) { |
| 793 | case 0xE0: mnem = "fchs"; break; |
| 794 | case 0xE1: mnem = "fabs"; break; |
| 795 | case 0xE4: mnem = "ftst"; break; |
| 796 | case 0xE8: mnem = "fld1"; break; |
| 797 | case 0xEB: mnem = "fldpi"; break; |
| 798 | case 0xED: mnem = "fldln2"; break; |
| 799 | case 0xEE: mnem = "fldz"; break; |
| 800 | case 0xF0: mnem = "f2xm1"; break; |
| 801 | case 0xF1: mnem = "fyl2x"; break; |
| 802 | case 0xF4: mnem = "fxtract"; break; |
| 803 | case 0xF5: mnem = "fprem1"; break; |
| 804 | case 0xF7: mnem = "fincstp"; break; |
| 805 | case 0xF8: mnem = "fprem"; break; |
| 806 | case 0xFC: mnem = "frndint"; break; |
| 807 | case 0xFD: mnem = "fscale"; break; |
| 808 | case 0xFE: mnem = "fsin"; break; |
| 809 | case 0xFF: mnem = "fcos"; break; |
| 810 | default: UnimplementedInstruction(); |
| 811 | } |
| 812 | } |
| 813 | break; |
| 814 | |
| 815 | case 0xDA: |
| 816 | if (modrm_byte == 0xE9) { |
| 817 | mnem = "fucompp"; |
| 818 | } else { |
| 819 | UnimplementedInstruction(); |
| 820 | } |
| 821 | break; |
| 822 | |
| 823 | case 0xDB: |
| 824 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 825 | mnem = "fucomi"; |
| 826 | has_register = true; |
| 827 | } else if (modrm_byte == 0xE2) { |
| 828 | mnem = "fclex"; |
| 829 | } else if (modrm_byte == 0xE3) { |
| 830 | mnem = "fninit"; |
| 831 | } else { |
| 832 | UnimplementedInstruction(); |
| 833 | } |
| 834 | break; |
| 835 | |
| 836 | case 0xDC: |
| 837 | has_register = true; |
| 838 | switch (modrm_byte & 0xF8) { |
| 839 | case 0xC0: mnem = "fadd"; break; |
| 840 | case 0xE8: mnem = "fsub"; break; |
| 841 | case 0xC8: mnem = "fmul"; break; |
| 842 | case 0xF8: mnem = "fdiv"; break; |
| 843 | default: UnimplementedInstruction(); |
| 844 | } |
| 845 | break; |
| 846 | |
| 847 | case 0xDD: |
| 848 | has_register = true; |
| 849 | switch (modrm_byte & 0xF8) { |
| 850 | case 0xC0: mnem = "ffree"; break; |
| 851 | case 0xD0: mnem = "fst"; break; |
| 852 | case 0xD8: mnem = "fstp"; break; |
| 853 | default: UnimplementedInstruction(); |
| 854 | } |
| 855 | break; |
| 856 | |
| 857 | case 0xDE: |
| 858 | if (modrm_byte == 0xD9) { |
| 859 | mnem = "fcompp"; |
| 860 | } else { |
| 861 | has_register = true; |
| 862 | switch (modrm_byte & 0xF8) { |
| 863 | case 0xC0: mnem = "faddp"; break; |
| 864 | case 0xE8: mnem = "fsubp"; break; |
| 865 | case 0xC8: mnem = "fmulp"; break; |
| 866 | case 0xF8: mnem = "fdivp"; break; |
| 867 | default: UnimplementedInstruction(); |
| 868 | } |
| 869 | } |
| 870 | break; |
| 871 | |
| 872 | case 0xDF: |
| 873 | if (modrm_byte == 0xE0) { |
| 874 | mnem = "fnstsw_ax"; |
| 875 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 876 | mnem = "fucomip"; |
| 877 | has_register = true; |
| 878 | } |
| 879 | break; |
| 880 | |
| 881 | default: UnimplementedInstruction(); |
| 882 | } |
| 883 | |
| 884 | if (has_register) { |
| 885 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 886 | } else { |
| 887 | AppendToBuffer("%s", mnem); |
| 888 | } |
| 889 | return 2; |
| 890 | } |
| 891 | |
| 892 | |
| 893 | // Mnemonics for instructions 0xF0 byte. |
| 894 | // Returns NULL if the instruction is not handled here. |
| 895 | static const char* F0Mnem(byte f0byte) { |
| 896 | switch (f0byte) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 897 | case 0x0B: |
| 898 | return "ud2"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 899 | case 0x18: |
| 900 | return "prefetch"; |
| 901 | case 0xA2: |
| 902 | return "cpuid"; |
| 903 | case 0xBE: |
| 904 | return "movsx_b"; |
| 905 | case 0xBF: |
| 906 | return "movsx_w"; |
| 907 | case 0xB6: |
| 908 | return "movzx_b"; |
| 909 | case 0xB7: |
| 910 | return "movzx_w"; |
| 911 | case 0xAF: |
| 912 | return "imul"; |
| 913 | case 0xA4: |
| 914 | return "shld"; |
| 915 | case 0xA5: |
| 916 | return "shld"; |
| 917 | case 0xAD: |
| 918 | return "shrd"; |
| 919 | case 0xAC: |
| 920 | return "shrd"; // 3-operand version. |
| 921 | case 0xAB: |
| 922 | return "bts"; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 923 | case 0xB0: |
| 924 | return "cmpxchg_b"; |
| 925 | case 0xB1: |
| 926 | return "cmpxchg"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 927 | case 0xBC: |
| 928 | return "bsf"; |
| 929 | case 0xBD: |
| 930 | return "bsr"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 931 | default: return NULL; |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | |
| 936 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 937 | int DisassemblerX87::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 938 | byte* instr) { |
| 939 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 940 | byte* data = instr; |
| 941 | // Check for hints. |
| 942 | const char* branch_hint = NULL; |
| 943 | // We use these two prefixes only with branch prediction |
| 944 | if (*data == 0x3E /*ds*/) { |
| 945 | branch_hint = "predicted taken"; |
| 946 | data++; |
| 947 | } else if (*data == 0x2E /*cs*/) { |
| 948 | branch_hint = "predicted not taken"; |
| 949 | data++; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 950 | } else if (*data == 0xF0 /*lock*/) { |
| 951 | AppendToBuffer("lock "); |
| 952 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 953 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 954 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 955 | bool processed = true; // Will be set to false if the current instruction |
| 956 | // is not in 'instructions' table. |
| 957 | const InstructionDesc& idesc = instruction_table_->Get(*data); |
| 958 | switch (idesc.type) { |
| 959 | case ZERO_OPERANDS_INSTR: |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 960 | AppendToBuffer("%s", idesc.mnem); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 961 | data++; |
| 962 | break; |
| 963 | |
| 964 | case TWO_OPERANDS_INSTR: |
| 965 | data++; |
| 966 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 967 | break; |
| 968 | |
| 969 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 970 | data += JumpConditionalShort(data, branch_hint); |
| 971 | break; |
| 972 | |
| 973 | case REGISTER_INSTR: |
| 974 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 975 | data++; |
| 976 | break; |
| 977 | |
| 978 | case MOVE_REG_INSTR: { |
| 979 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 980 | AppendToBuffer("mov %s,%s", |
| 981 | NameOfCPURegister(*data & 0x07), |
| 982 | NameOfAddress(addr)); |
| 983 | data += 5; |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | case CALL_JUMP_INSTR: { |
| 988 | byte* addr = data + *reinterpret_cast<int32_t*>(data+1) + 5; |
| 989 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 990 | data += 5; |
| 991 | break; |
| 992 | } |
| 993 | |
| 994 | case SHORT_IMMEDIATE_INSTR: { |
| 995 | byte* addr = reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data+1)); |
| 996 | AppendToBuffer("%s eax,%s", idesc.mnem, NameOfAddress(addr)); |
| 997 | data += 5; |
| 998 | break; |
| 999 | } |
| 1000 | |
| 1001 | case BYTE_IMMEDIATE_INSTR: { |
| 1002 | AppendToBuffer("%s al,0x%x", idesc.mnem, data[1]); |
| 1003 | data += 2; |
| 1004 | break; |
| 1005 | } |
| 1006 | |
| 1007 | case NO_INSTR: |
| 1008 | processed = false; |
| 1009 | break; |
| 1010 | |
| 1011 | default: |
| 1012 | UNIMPLEMENTED(); // This type is not implemented. |
| 1013 | } |
| 1014 | //---------------------------- |
| 1015 | if (!processed) { |
| 1016 | switch (*data) { |
| 1017 | case 0xC2: |
| 1018 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 1019 | data += 3; |
| 1020 | break; |
| 1021 | |
| 1022 | case 0x6B: { |
| 1023 | data++; |
| 1024 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1025 | AppendToBuffer(",%d", *data); |
| 1026 | data++; |
| 1027 | } break; |
| 1028 | |
| 1029 | case 0x69: { |
| 1030 | data++; |
| 1031 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1032 | AppendToBuffer(",%d", *reinterpret_cast<int32_t*>(data)); |
| 1033 | data += 4; |
| 1034 | } |
| 1035 | break; |
| 1036 | |
| 1037 | case 0xF6: |
| 1038 | { data++; |
| 1039 | int mod, regop, rm; |
| 1040 | get_modrm(*data, &mod, ®op, &rm); |
| 1041 | if (regop == eax) { |
| 1042 | AppendToBuffer("test_b "); |
| 1043 | data += PrintRightByteOperand(data); |
| 1044 | int32_t imm = *data; |
| 1045 | AppendToBuffer(",0x%x", imm); |
| 1046 | data++; |
| 1047 | } else { |
| 1048 | UnimplementedInstruction(); |
| 1049 | } |
| 1050 | } |
| 1051 | break; |
| 1052 | |
| 1053 | case 0x81: // fall through |
| 1054 | case 0x83: // 0x81 with sign extension bit set |
| 1055 | data += PrintImmediateOp(data); |
| 1056 | break; |
| 1057 | |
| 1058 | case 0x0F: |
| 1059 | { byte f0byte = data[1]; |
| 1060 | const char* f0mnem = F0Mnem(f0byte); |
| 1061 | if (f0byte == 0x18) { |
| 1062 | data += 2; |
| 1063 | int mod, regop, rm; |
| 1064 | get_modrm(*data, &mod, ®op, &rm); |
| 1065 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 1066 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 1067 | data += PrintRightOperand(data); |
| 1068 | } else if (f0byte == 0x1F && data[2] == 0) { |
| 1069 | AppendToBuffer("nop"); // 3 byte nop. |
| 1070 | data += 3; |
| 1071 | } else if (f0byte == 0x1F && data[2] == 0x40 && data[3] == 0) { |
| 1072 | AppendToBuffer("nop"); // 4 byte nop. |
| 1073 | data += 4; |
| 1074 | } else if (f0byte == 0x1F && data[2] == 0x44 && data[3] == 0 && |
| 1075 | data[4] == 0) { |
| 1076 | AppendToBuffer("nop"); // 5 byte nop. |
| 1077 | data += 5; |
| 1078 | } else if (f0byte == 0x1F && data[2] == 0x80 && data[3] == 0 && |
| 1079 | data[4] == 0 && data[5] == 0 && data[6] == 0) { |
| 1080 | AppendToBuffer("nop"); // 7 byte nop. |
| 1081 | data += 7; |
| 1082 | } else if (f0byte == 0x1F && data[2] == 0x84 && data[3] == 0 && |
| 1083 | data[4] == 0 && data[5] == 0 && data[6] == 0 && |
| 1084 | data[7] == 0) { |
| 1085 | AppendToBuffer("nop"); // 8 byte nop. |
| 1086 | data += 8; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1087 | } else if (f0byte == 0x0B || f0byte == 0xA2 || f0byte == 0x31) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1088 | AppendToBuffer("%s", f0mnem); |
| 1089 | data += 2; |
| 1090 | } else if (f0byte == 0x28) { |
| 1091 | data += 2; |
| 1092 | int mod, regop, rm; |
| 1093 | get_modrm(*data, &mod, ®op, &rm); |
| 1094 | AppendToBuffer("movaps %s,%s", |
| 1095 | NameOfXMMRegister(regop), |
| 1096 | NameOfXMMRegister(rm)); |
| 1097 | data++; |
| 1098 | } else if (f0byte >= 0x53 && f0byte <= 0x5F) { |
| 1099 | const char* const pseudo_op[] = { |
| 1100 | "rcpps", |
| 1101 | "andps", |
| 1102 | "andnps", |
| 1103 | "orps", |
| 1104 | "xorps", |
| 1105 | "addps", |
| 1106 | "mulps", |
| 1107 | "cvtps2pd", |
| 1108 | "cvtdq2ps", |
| 1109 | "subps", |
| 1110 | "minps", |
| 1111 | "divps", |
| 1112 | "maxps", |
| 1113 | }; |
| 1114 | |
| 1115 | data += 2; |
| 1116 | int mod, regop, rm; |
| 1117 | get_modrm(*data, &mod, ®op, &rm); |
| 1118 | AppendToBuffer("%s %s,", |
| 1119 | pseudo_op[f0byte - 0x53], |
| 1120 | NameOfXMMRegister(regop)); |
| 1121 | data += PrintRightXMMOperand(data); |
| 1122 | } else if (f0byte == 0x50) { |
| 1123 | data += 2; |
| 1124 | int mod, regop, rm; |
| 1125 | get_modrm(*data, &mod, ®op, &rm); |
| 1126 | AppendToBuffer("movmskps %s,%s", |
| 1127 | NameOfCPURegister(regop), |
| 1128 | NameOfXMMRegister(rm)); |
| 1129 | data++; |
| 1130 | } else if (f0byte== 0xC6) { |
| 1131 | // shufps xmm, xmm/m128, imm8 |
| 1132 | data += 2; |
| 1133 | int mod, regop, rm; |
| 1134 | get_modrm(*data, &mod, ®op, &rm); |
| 1135 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1136 | AppendToBuffer("shufps %s,%s,%d", |
| 1137 | NameOfXMMRegister(rm), |
| 1138 | NameOfXMMRegister(regop), |
| 1139 | static_cast<int>(imm8)); |
| 1140 | data += 2; |
| 1141 | } else if ((f0byte & 0xF0) == 0x80) { |
| 1142 | data += JumpConditional(data, branch_hint); |
| 1143 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 1144 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 1145 | data += 2; |
| 1146 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 1147 | } else if ((f0byte & 0xF0) == 0x90) { |
| 1148 | data += SetCC(data); |
| 1149 | } else if ((f0byte & 0xF0) == 0x40) { |
| 1150 | data += CMov(data); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1151 | } else if (f0byte == 0xA4 || f0byte == 0xAC) { |
| 1152 | // shld, shrd |
| 1153 | data += 2; |
| 1154 | AppendToBuffer("%s ", f0mnem); |
| 1155 | int mod, regop, rm; |
| 1156 | get_modrm(*data, &mod, ®op, &rm); |
| 1157 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1158 | data += 2; |
| 1159 | AppendToBuffer("%s,%s,%d", NameOfCPURegister(rm), |
| 1160 | NameOfCPURegister(regop), static_cast<int>(imm8)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1161 | } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1162 | // shrd_cl, shld_cl, bts |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1163 | data += 2; |
| 1164 | AppendToBuffer("%s ", f0mnem); |
| 1165 | int mod, regop, rm; |
| 1166 | get_modrm(*data, &mod, ®op, &rm); |
| 1167 | data += PrintRightOperand(data); |
| 1168 | if (f0byte == 0xAB) { |
| 1169 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1170 | } else { |
| 1171 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
| 1172 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1173 | } else if (f0byte == 0xB0) { |
| 1174 | // cmpxchg_b |
| 1175 | data += 2; |
| 1176 | AppendToBuffer("%s ", f0mnem); |
| 1177 | int mod, regop, rm; |
| 1178 | get_modrm(*data, &mod, ®op, &rm); |
| 1179 | data += PrintRightOperand(data); |
| 1180 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1181 | } else if (f0byte == 0xB1) { |
| 1182 | // cmpxchg |
| 1183 | data += 2; |
| 1184 | data += PrintOperands(f0mnem, OPER_REG_OP_ORDER, data); |
| 1185 | } else if (f0byte == 0xBC) { |
| 1186 | data += 2; |
| 1187 | int mod, regop, rm; |
| 1188 | get_modrm(*data, &mod, ®op, &rm); |
| 1189 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1190 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1191 | } else if (f0byte == 0xBD) { |
| 1192 | data += 2; |
| 1193 | int mod, regop, rm; |
| 1194 | get_modrm(*data, &mod, ®op, &rm); |
| 1195 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1196 | data += PrintRightOperand(data); |
| 1197 | } else { |
| 1198 | UnimplementedInstruction(); |
| 1199 | } |
| 1200 | } |
| 1201 | break; |
| 1202 | |
| 1203 | case 0x8F: |
| 1204 | { data++; |
| 1205 | int mod, regop, rm; |
| 1206 | get_modrm(*data, &mod, ®op, &rm); |
| 1207 | if (regop == eax) { |
| 1208 | AppendToBuffer("pop "); |
| 1209 | data += PrintRightOperand(data); |
| 1210 | } |
| 1211 | } |
| 1212 | break; |
| 1213 | |
| 1214 | case 0xFF: |
| 1215 | { data++; |
| 1216 | int mod, regop, rm; |
| 1217 | get_modrm(*data, &mod, ®op, &rm); |
| 1218 | const char* mnem = NULL; |
| 1219 | switch (regop) { |
| 1220 | case esi: mnem = "push"; break; |
| 1221 | case eax: mnem = "inc"; break; |
| 1222 | case ecx: mnem = "dec"; break; |
| 1223 | case edx: mnem = "call"; break; |
| 1224 | case esp: mnem = "jmp"; break; |
| 1225 | default: mnem = "???"; |
| 1226 | } |
| 1227 | AppendToBuffer("%s ", mnem); |
| 1228 | data += PrintRightOperand(data); |
| 1229 | } |
| 1230 | break; |
| 1231 | |
| 1232 | case 0xC7: // imm32, fall through |
| 1233 | case 0xC6: // imm8 |
| 1234 | { bool is_byte = *data == 0xC6; |
| 1235 | data++; |
| 1236 | if (is_byte) { |
| 1237 | AppendToBuffer("%s ", "mov_b"); |
| 1238 | data += PrintRightByteOperand(data); |
| 1239 | int32_t imm = *data; |
| 1240 | AppendToBuffer(",0x%x", imm); |
| 1241 | data++; |
| 1242 | } else { |
| 1243 | AppendToBuffer("%s ", "mov"); |
| 1244 | data += PrintRightOperand(data); |
| 1245 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1246 | AppendToBuffer(",0x%x", imm); |
| 1247 | data += 4; |
| 1248 | } |
| 1249 | } |
| 1250 | break; |
| 1251 | |
| 1252 | case 0x80: |
| 1253 | { data++; |
| 1254 | int mod, regop, rm; |
| 1255 | get_modrm(*data, &mod, ®op, &rm); |
| 1256 | const char* mnem = NULL; |
| 1257 | switch (regop) { |
| 1258 | case 5: mnem = "subb"; break; |
| 1259 | case 7: mnem = "cmpb"; break; |
| 1260 | default: UnimplementedInstruction(); |
| 1261 | } |
| 1262 | AppendToBuffer("%s ", mnem); |
| 1263 | data += PrintRightByteOperand(data); |
| 1264 | int32_t imm = *data; |
| 1265 | AppendToBuffer(",0x%x", imm); |
| 1266 | data++; |
| 1267 | } |
| 1268 | break; |
| 1269 | |
| 1270 | case 0x88: // 8bit, fall through |
| 1271 | case 0x89: // 32bit |
| 1272 | { bool is_byte = *data == 0x88; |
| 1273 | int mod, regop, rm; |
| 1274 | data++; |
| 1275 | get_modrm(*data, &mod, ®op, &rm); |
| 1276 | if (is_byte) { |
| 1277 | AppendToBuffer("%s ", "mov_b"); |
| 1278 | data += PrintRightByteOperand(data); |
| 1279 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1280 | } else { |
| 1281 | AppendToBuffer("%s ", "mov"); |
| 1282 | data += PrintRightOperand(data); |
| 1283 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1284 | } |
| 1285 | } |
| 1286 | break; |
| 1287 | |
| 1288 | case 0x66: // prefix |
| 1289 | while (*data == 0x66) data++; |
| 1290 | if (*data == 0xf && data[1] == 0x1f) { |
| 1291 | AppendToBuffer("nop"); // 0x66 prefix |
| 1292 | } else if (*data == 0x90) { |
| 1293 | AppendToBuffer("nop"); // 0x66 prefix |
| 1294 | } else if (*data == 0x8B) { |
| 1295 | data++; |
| 1296 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1297 | } else if (*data == 0x87) { |
| 1298 | data++; |
| 1299 | int mod, regop, rm; |
| 1300 | get_modrm(*data, &mod, ®op, &rm); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1301 | AppendToBuffer("xchg_w %s,", NameOfCPURegister(regop)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1302 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1303 | } else if (*data == 0x89) { |
| 1304 | data++; |
| 1305 | int mod, regop, rm; |
| 1306 | get_modrm(*data, &mod, ®op, &rm); |
| 1307 | AppendToBuffer("mov_w "); |
| 1308 | data += PrintRightOperand(data); |
| 1309 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1310 | } else if (*data == 0xC7) { |
| 1311 | data++; |
| 1312 | AppendToBuffer("%s ", "mov_w"); |
| 1313 | data += PrintRightOperand(data); |
| 1314 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1315 | AppendToBuffer(",0x%x", imm); |
| 1316 | data += 2; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1317 | } else if (*data == 0xF7) { |
| 1318 | data++; |
| 1319 | AppendToBuffer("%s ", "test_w"); |
| 1320 | data += PrintRightOperand(data); |
| 1321 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1322 | AppendToBuffer(",0x%x", imm); |
| 1323 | data += 2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1324 | } else if (*data == 0x0F) { |
| 1325 | data++; |
| 1326 | if (*data == 0x38) { |
| 1327 | data++; |
| 1328 | if (*data == 0x17) { |
| 1329 | data++; |
| 1330 | int mod, regop, rm; |
| 1331 | get_modrm(*data, &mod, ®op, &rm); |
| 1332 | AppendToBuffer("ptest %s,%s", |
| 1333 | NameOfXMMRegister(regop), |
| 1334 | NameOfXMMRegister(rm)); |
| 1335 | data++; |
| 1336 | } else if (*data == 0x2A) { |
| 1337 | // movntdqa |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1338 | UnimplementedInstruction(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1339 | } else { |
| 1340 | UnimplementedInstruction(); |
| 1341 | } |
| 1342 | } else if (*data == 0x3A) { |
| 1343 | data++; |
| 1344 | if (*data == 0x0B) { |
| 1345 | data++; |
| 1346 | int mod, regop, rm; |
| 1347 | get_modrm(*data, &mod, ®op, &rm); |
| 1348 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1349 | AppendToBuffer("roundsd %s,%s,%d", |
| 1350 | NameOfXMMRegister(regop), |
| 1351 | NameOfXMMRegister(rm), |
| 1352 | static_cast<int>(imm8)); |
| 1353 | data += 2; |
| 1354 | } else if (*data == 0x16) { |
| 1355 | data++; |
| 1356 | int mod, regop, rm; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1357 | get_modrm(*data, &mod, &rm, ®op); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1358 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1359 | AppendToBuffer("pextrd %s,%s,%d", |
| 1360 | NameOfCPURegister(regop), |
| 1361 | NameOfXMMRegister(rm), |
| 1362 | static_cast<int>(imm8)); |
| 1363 | data += 2; |
| 1364 | } else if (*data == 0x17) { |
| 1365 | data++; |
| 1366 | int mod, regop, rm; |
| 1367 | get_modrm(*data, &mod, ®op, &rm); |
| 1368 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1369 | AppendToBuffer("extractps %s,%s,%d", |
| 1370 | NameOfCPURegister(rm), |
| 1371 | NameOfXMMRegister(regop), |
| 1372 | static_cast<int>(imm8)); |
| 1373 | data += 2; |
| 1374 | } else if (*data == 0x22) { |
| 1375 | data++; |
| 1376 | int mod, regop, rm; |
| 1377 | get_modrm(*data, &mod, ®op, &rm); |
| 1378 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1379 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1380 | NameOfXMMRegister(regop), |
| 1381 | NameOfCPURegister(rm), |
| 1382 | static_cast<int>(imm8)); |
| 1383 | data += 2; |
| 1384 | } else { |
| 1385 | UnimplementedInstruction(); |
| 1386 | } |
| 1387 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1388 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
| 1389 | data++; |
| 1390 | int mod, regop, rm; |
| 1391 | get_modrm(*data, &mod, ®op, &rm); |
| 1392 | if (mod == 0x3) { |
| 1393 | AppendToBuffer("%s %s,%s", mnem, |
| 1394 | NameOfXMMRegister(regop), |
| 1395 | NameOfXMMRegister(rm)); |
| 1396 | data++; |
| 1397 | } else { |
| 1398 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1399 | data += PrintRightOperand(data); |
| 1400 | } |
| 1401 | } else if (*data == 0x50) { |
| 1402 | data++; |
| 1403 | int mod, regop, rm; |
| 1404 | get_modrm(*data, &mod, ®op, &rm); |
| 1405 | AppendToBuffer("movmskpd %s,%s", |
| 1406 | NameOfCPURegister(regop), |
| 1407 | NameOfXMMRegister(rm)); |
| 1408 | data++; |
| 1409 | } else if (*data == 0x54) { |
| 1410 | data++; |
| 1411 | int mod, regop, rm; |
| 1412 | get_modrm(*data, &mod, ®op, &rm); |
| 1413 | AppendToBuffer("andpd %s,%s", |
| 1414 | NameOfXMMRegister(regop), |
| 1415 | NameOfXMMRegister(rm)); |
| 1416 | data++; |
| 1417 | } else if (*data == 0x56) { |
| 1418 | data++; |
| 1419 | int mod, regop, rm; |
| 1420 | get_modrm(*data, &mod, ®op, &rm); |
| 1421 | AppendToBuffer("orpd %s,%s", |
| 1422 | NameOfXMMRegister(regop), |
| 1423 | NameOfXMMRegister(rm)); |
| 1424 | data++; |
| 1425 | } else if (*data == 0x57) { |
| 1426 | data++; |
| 1427 | int mod, regop, rm; |
| 1428 | get_modrm(*data, &mod, ®op, &rm); |
| 1429 | AppendToBuffer("xorpd %s,%s", |
| 1430 | NameOfXMMRegister(regop), |
| 1431 | NameOfXMMRegister(rm)); |
| 1432 | data++; |
| 1433 | } else if (*data == 0x6E) { |
| 1434 | data++; |
| 1435 | int mod, regop, rm; |
| 1436 | get_modrm(*data, &mod, ®op, &rm); |
| 1437 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1438 | data += PrintRightOperand(data); |
| 1439 | } else if (*data == 0x6F) { |
| 1440 | data++; |
| 1441 | int mod, regop, rm; |
| 1442 | get_modrm(*data, &mod, ®op, &rm); |
| 1443 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
| 1444 | data += PrintRightXMMOperand(data); |
| 1445 | } else if (*data == 0x70) { |
| 1446 | data++; |
| 1447 | int mod, regop, rm; |
| 1448 | get_modrm(*data, &mod, ®op, &rm); |
| 1449 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1450 | AppendToBuffer("pshufd %s,%s,%d", |
| 1451 | NameOfXMMRegister(regop), |
| 1452 | NameOfXMMRegister(rm), |
| 1453 | static_cast<int>(imm8)); |
| 1454 | data += 2; |
| 1455 | } else if (*data == 0x76) { |
| 1456 | data++; |
| 1457 | int mod, regop, rm; |
| 1458 | get_modrm(*data, &mod, ®op, &rm); |
| 1459 | AppendToBuffer("pcmpeqd %s,%s", |
| 1460 | NameOfXMMRegister(regop), |
| 1461 | NameOfXMMRegister(rm)); |
| 1462 | data++; |
| 1463 | } else if (*data == 0x90) { |
| 1464 | data++; |
| 1465 | AppendToBuffer("nop"); // 2 byte nop. |
| 1466 | } else if (*data == 0xF3) { |
| 1467 | data++; |
| 1468 | int mod, regop, rm; |
| 1469 | get_modrm(*data, &mod, ®op, &rm); |
| 1470 | AppendToBuffer("psllq %s,%s", |
| 1471 | NameOfXMMRegister(regop), |
| 1472 | NameOfXMMRegister(rm)); |
| 1473 | data++; |
| 1474 | } else if (*data == 0x73) { |
| 1475 | data++; |
| 1476 | int mod, regop, rm; |
| 1477 | get_modrm(*data, &mod, ®op, &rm); |
| 1478 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1479 | DCHECK(regop == esi || regop == edx); |
| 1480 | AppendToBuffer("%s %s,%d", |
| 1481 | (regop == esi) ? "psllq" : "psrlq", |
| 1482 | NameOfXMMRegister(rm), |
| 1483 | static_cast<int>(imm8)); |
| 1484 | data += 2; |
| 1485 | } else if (*data == 0xD3) { |
| 1486 | data++; |
| 1487 | int mod, regop, rm; |
| 1488 | get_modrm(*data, &mod, ®op, &rm); |
| 1489 | AppendToBuffer("psrlq %s,%s", |
| 1490 | NameOfXMMRegister(regop), |
| 1491 | NameOfXMMRegister(rm)); |
| 1492 | data++; |
| 1493 | } else if (*data == 0x7F) { |
| 1494 | AppendToBuffer("movdqa "); |
| 1495 | data++; |
| 1496 | int mod, regop, rm; |
| 1497 | get_modrm(*data, &mod, ®op, &rm); |
| 1498 | data += PrintRightXMMOperand(data); |
| 1499 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1500 | } else if (*data == 0x7E) { |
| 1501 | data++; |
| 1502 | int mod, regop, rm; |
| 1503 | get_modrm(*data, &mod, ®op, &rm); |
| 1504 | AppendToBuffer("movd "); |
| 1505 | data += PrintRightOperand(data); |
| 1506 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1507 | } else if (*data == 0xDB) { |
| 1508 | data++; |
| 1509 | int mod, regop, rm; |
| 1510 | get_modrm(*data, &mod, ®op, &rm); |
| 1511 | AppendToBuffer("pand %s,%s", |
| 1512 | NameOfXMMRegister(regop), |
| 1513 | NameOfXMMRegister(rm)); |
| 1514 | data++; |
| 1515 | } else if (*data == 0xE7) { |
| 1516 | data++; |
| 1517 | int mod, regop, rm; |
| 1518 | get_modrm(*data, &mod, ®op, &rm); |
| 1519 | if (mod == 3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1520 | // movntdq |
| 1521 | UnimplementedInstruction(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1522 | } else { |
| 1523 | UnimplementedInstruction(); |
| 1524 | } |
| 1525 | } else if (*data == 0xEF) { |
| 1526 | data++; |
| 1527 | int mod, regop, rm; |
| 1528 | get_modrm(*data, &mod, ®op, &rm); |
| 1529 | AppendToBuffer("pxor %s,%s", |
| 1530 | NameOfXMMRegister(regop), |
| 1531 | NameOfXMMRegister(rm)); |
| 1532 | data++; |
| 1533 | } else if (*data == 0xEB) { |
| 1534 | data++; |
| 1535 | int mod, regop, rm; |
| 1536 | get_modrm(*data, &mod, ®op, &rm); |
| 1537 | AppendToBuffer("por %s,%s", |
| 1538 | NameOfXMMRegister(regop), |
| 1539 | NameOfXMMRegister(rm)); |
| 1540 | data++; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1541 | } else if (*data == 0xB1) { |
| 1542 | data++; |
| 1543 | data += PrintOperands("cmpxchg_w", OPER_REG_OP_ORDER, data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1544 | } else { |
| 1545 | UnimplementedInstruction(); |
| 1546 | } |
| 1547 | } else { |
| 1548 | UnimplementedInstruction(); |
| 1549 | } |
| 1550 | break; |
| 1551 | |
| 1552 | case 0xFE: |
| 1553 | { data++; |
| 1554 | int mod, regop, rm; |
| 1555 | get_modrm(*data, &mod, ®op, &rm); |
| 1556 | if (regop == ecx) { |
| 1557 | AppendToBuffer("dec_b "); |
| 1558 | data += PrintRightOperand(data); |
| 1559 | } else { |
| 1560 | UnimplementedInstruction(); |
| 1561 | } |
| 1562 | } |
| 1563 | break; |
| 1564 | |
| 1565 | case 0x68: |
| 1566 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1567 | data += 5; |
| 1568 | break; |
| 1569 | |
| 1570 | case 0x6A: |
| 1571 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1572 | data += 2; |
| 1573 | break; |
| 1574 | |
| 1575 | case 0xA8: |
| 1576 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1577 | data += 2; |
| 1578 | break; |
| 1579 | |
| 1580 | case 0xA9: |
| 1581 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1582 | data += 5; |
| 1583 | break; |
| 1584 | |
| 1585 | case 0xD1: // fall through |
| 1586 | case 0xD3: // fall through |
| 1587 | case 0xC1: |
| 1588 | data += D1D3C1Instruction(data); |
| 1589 | break; |
| 1590 | |
| 1591 | case 0xD8: // fall through |
| 1592 | case 0xD9: // fall through |
| 1593 | case 0xDA: // fall through |
| 1594 | case 0xDB: // fall through |
| 1595 | case 0xDC: // fall through |
| 1596 | case 0xDD: // fall through |
| 1597 | case 0xDE: // fall through |
| 1598 | case 0xDF: |
| 1599 | data += FPUInstruction(data); |
| 1600 | break; |
| 1601 | |
| 1602 | case 0xEB: |
| 1603 | data += JumpShort(data); |
| 1604 | break; |
| 1605 | |
| 1606 | case 0xF2: |
| 1607 | if (*(data+1) == 0x0F) { |
| 1608 | byte b2 = *(data+2); |
| 1609 | if (b2 == 0x11) { |
| 1610 | AppendToBuffer("movsd "); |
| 1611 | data += 3; |
| 1612 | int mod, regop, rm; |
| 1613 | get_modrm(*data, &mod, ®op, &rm); |
| 1614 | data += PrintRightXMMOperand(data); |
| 1615 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1616 | } else if (b2 == 0x10) { |
| 1617 | data += 3; |
| 1618 | int mod, regop, rm; |
| 1619 | get_modrm(*data, &mod, ®op, &rm); |
| 1620 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
| 1621 | data += PrintRightXMMOperand(data); |
| 1622 | } else if (b2 == 0x5A) { |
| 1623 | data += 3; |
| 1624 | int mod, regop, rm; |
| 1625 | get_modrm(*data, &mod, ®op, &rm); |
| 1626 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 1627 | data += PrintRightXMMOperand(data); |
| 1628 | } else { |
| 1629 | const char* mnem = "?"; |
| 1630 | switch (b2) { |
| 1631 | case 0x2A: mnem = "cvtsi2sd"; break; |
| 1632 | case 0x2C: mnem = "cvttsd2si"; break; |
| 1633 | case 0x2D: mnem = "cvtsd2si"; break; |
| 1634 | case 0x51: mnem = "sqrtsd"; break; |
| 1635 | case 0x58: mnem = "addsd"; break; |
| 1636 | case 0x59: mnem = "mulsd"; break; |
| 1637 | case 0x5C: mnem = "subsd"; break; |
| 1638 | case 0x5E: mnem = "divsd"; break; |
| 1639 | } |
| 1640 | data += 3; |
| 1641 | int mod, regop, rm; |
| 1642 | get_modrm(*data, &mod, ®op, &rm); |
| 1643 | if (b2 == 0x2A) { |
| 1644 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1645 | data += PrintRightOperand(data); |
| 1646 | } else if (b2 == 0x2C || b2 == 0x2D) { |
| 1647 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 1648 | data += PrintRightXMMOperand(data); |
| 1649 | } else if (b2 == 0xC2) { |
| 1650 | // Intel manual 2A, Table 3-18. |
| 1651 | const char* const pseudo_op[] = { |
| 1652 | "cmpeqsd", |
| 1653 | "cmpltsd", |
| 1654 | "cmplesd", |
| 1655 | "cmpunordsd", |
| 1656 | "cmpneqsd", |
| 1657 | "cmpnltsd", |
| 1658 | "cmpnlesd", |
| 1659 | "cmpordsd" |
| 1660 | }; |
| 1661 | AppendToBuffer("%s %s,%s", |
| 1662 | pseudo_op[data[1]], |
| 1663 | NameOfXMMRegister(regop), |
| 1664 | NameOfXMMRegister(rm)); |
| 1665 | data += 2; |
| 1666 | } else { |
| 1667 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1668 | data += PrintRightXMMOperand(data); |
| 1669 | } |
| 1670 | } |
| 1671 | } else { |
| 1672 | UnimplementedInstruction(); |
| 1673 | } |
| 1674 | break; |
| 1675 | |
| 1676 | case 0xF3: |
| 1677 | if (*(data+1) == 0x0F) { |
| 1678 | byte b2 = *(data+2); |
| 1679 | if (b2 == 0x11) { |
| 1680 | AppendToBuffer("movss "); |
| 1681 | data += 3; |
| 1682 | int mod, regop, rm; |
| 1683 | get_modrm(*data, &mod, ®op, &rm); |
| 1684 | data += PrintRightXMMOperand(data); |
| 1685 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1686 | } else if (b2 == 0x10) { |
| 1687 | data += 3; |
| 1688 | int mod, regop, rm; |
| 1689 | get_modrm(*data, &mod, ®op, &rm); |
| 1690 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 1691 | data += PrintRightXMMOperand(data); |
| 1692 | } else if (b2 == 0x2C) { |
| 1693 | data += 3; |
| 1694 | int mod, regop, rm; |
| 1695 | get_modrm(*data, &mod, ®op, &rm); |
| 1696 | AppendToBuffer("cvttss2si %s,", NameOfCPURegister(regop)); |
| 1697 | data += PrintRightXMMOperand(data); |
| 1698 | } else if (b2 == 0x5A) { |
| 1699 | data += 3; |
| 1700 | int mod, regop, rm; |
| 1701 | get_modrm(*data, &mod, ®op, &rm); |
| 1702 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 1703 | data += PrintRightXMMOperand(data); |
| 1704 | } else if (b2 == 0x6F) { |
| 1705 | data += 3; |
| 1706 | int mod, regop, rm; |
| 1707 | get_modrm(*data, &mod, ®op, &rm); |
| 1708 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
| 1709 | data += PrintRightXMMOperand(data); |
| 1710 | } else if (b2 == 0x7F) { |
| 1711 | AppendToBuffer("movdqu "); |
| 1712 | data += 3; |
| 1713 | int mod, regop, rm; |
| 1714 | get_modrm(*data, &mod, ®op, &rm); |
| 1715 | data += PrintRightXMMOperand(data); |
| 1716 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1717 | } else { |
| 1718 | UnimplementedInstruction(); |
| 1719 | } |
| 1720 | } else if (*(data+1) == 0xA5) { |
| 1721 | data += 2; |
| 1722 | AppendToBuffer("rep_movs"); |
| 1723 | } else if (*(data+1) == 0xAB) { |
| 1724 | data += 2; |
| 1725 | AppendToBuffer("rep_stos"); |
| 1726 | } else { |
| 1727 | UnimplementedInstruction(); |
| 1728 | } |
| 1729 | break; |
| 1730 | |
| 1731 | case 0xF7: |
| 1732 | data += F7Instruction(data); |
| 1733 | break; |
| 1734 | |
| 1735 | default: |
| 1736 | UnimplementedInstruction(); |
| 1737 | } |
| 1738 | } |
| 1739 | |
| 1740 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 1741 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 1742 | } |
| 1743 | |
| 1744 | int instr_len = data - instr; |
| 1745 | if (instr_len == 0) { |
| 1746 | printf("%02x", *data); |
| 1747 | } |
| 1748 | DCHECK(instr_len > 0); // Ensure progress. |
| 1749 | |
| 1750 | int outp = 0; |
| 1751 | // Instruction bytes. |
| 1752 | for (byte* bp = instr; bp < data; bp++) { |
| 1753 | outp += v8::internal::SNPrintF(out_buffer + outp, "%02x", *bp); |
| 1754 | } |
| 1755 | for (int i = 6 - instr_len; i >= 0; i--) { |
| 1756 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
| 1757 | } |
| 1758 | |
| 1759 | outp += v8::internal::SNPrintF(out_buffer + outp, " %s", tmp_buffer_.start()); |
| 1760 | return instr_len; |
| 1761 | } // NOLINT (function is too long) |
| 1762 | |
| 1763 | |
| 1764 | //------------------------------------------------------------------------------ |
| 1765 | |
| 1766 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1767 | static const char* const cpu_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1768 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 1769 | }; |
| 1770 | |
| 1771 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1772 | static const char* const byte_cpu_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1773 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 1774 | }; |
| 1775 | |
| 1776 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1777 | static const char* const xmm_regs[8] = { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1778 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 1779 | }; |
| 1780 | |
| 1781 | |
| 1782 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1783 | v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1784 | return tmp_buffer_.start(); |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 1789 | return NameOfAddress(addr); |
| 1790 | } |
| 1791 | |
| 1792 | |
| 1793 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 1794 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 1795 | return "noreg"; |
| 1796 | } |
| 1797 | |
| 1798 | |
| 1799 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 1800 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 1801 | return "noreg"; |
| 1802 | } |
| 1803 | |
| 1804 | |
| 1805 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 1806 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 1807 | return "noxmmreg"; |
| 1808 | } |
| 1809 | |
| 1810 | |
| 1811 | const char* NameConverter::NameInCode(byte* addr) const { |
| 1812 | // X87 does not embed debug strings at the moment. |
| 1813 | UNREACHABLE(); |
| 1814 | return ""; |
| 1815 | } |
| 1816 | |
| 1817 | |
| 1818 | //------------------------------------------------------------------------------ |
| 1819 | |
| 1820 | Disassembler::Disassembler(const NameConverter& converter) |
| 1821 | : converter_(converter) {} |
| 1822 | |
| 1823 | |
| 1824 | Disassembler::~Disassembler() {} |
| 1825 | |
| 1826 | |
| 1827 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 1828 | byte* instruction) { |
| 1829 | DisassemblerX87 d(converter_, false /*do not crash if unimplemented*/); |
| 1830 | return d.InstructionDecode(buffer, instruction); |
| 1831 | } |
| 1832 | |
| 1833 | |
| 1834 | // The IA-32 assembler does not currently use constant pools. |
| 1835 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 1836 | |
| 1837 | |
| 1838 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 1839 | NameConverter converter; |
| 1840 | Disassembler d(converter); |
| 1841 | for (byte* pc = begin; pc < end;) { |
| 1842 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 1843 | buffer[0] = '\0'; |
| 1844 | byte* prev_pc = pc; |
| 1845 | pc += d.InstructionDecode(buffer, pc); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1846 | fprintf(f, "%p", static_cast<void*>(prev_pc)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1847 | fprintf(f, " "); |
| 1848 | |
| 1849 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 1850 | fprintf(f, "%02x", *bp); |
| 1851 | } |
| 1852 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 1853 | fprintf(f, " "); |
| 1854 | } |
| 1855 | fprintf(f, " %s\n", buffer.start()); |
| 1856 | } |
| 1857 | } |
| 1858 | |
| 1859 | |
| 1860 | } // namespace disasm |
| 1861 | |
| 1862 | #endif // V8_TARGET_ARCH_X87 |