Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
| 5 | #include <assert.h> |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 6 | #include <stdarg.h> |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include <stdio.h> |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 8 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | #if V8_TARGET_ARCH_X64 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 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/base/lazy-instance.h" |
| 13 | #include "src/disasm.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 14 | |
| 15 | namespace disasm { |
| 16 | |
| 17 | enum OperandType { |
| 18 | UNSET_OP_ORDER = 0, |
| 19 | // Operand size decides between 16, 32 and 64 bit operands. |
| 20 | REG_OPER_OP_ORDER = 1, // Register destination, operand source. |
| 21 | OPER_REG_OP_ORDER = 2, // Operand destination, register source. |
| 22 | // Fixed 8-bit operands. |
| 23 | BYTE_SIZE_OPERAND_FLAG = 4, |
| 24 | BYTE_REG_OPER_OP_ORDER = REG_OPER_OP_ORDER | BYTE_SIZE_OPERAND_FLAG, |
| 25 | BYTE_OPER_REG_OP_ORDER = OPER_REG_OP_ORDER | BYTE_SIZE_OPERAND_FLAG |
| 26 | }; |
| 27 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 28 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | //------------------------------------------------------------------ |
| 30 | // Tables |
| 31 | //------------------------------------------------------------------ |
| 32 | struct ByteMnemonic { |
| 33 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 34 | OperandType op_order_; |
| 35 | const char* mnem; |
| 36 | }; |
| 37 | |
| 38 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 39 | static const ByteMnemonic two_operands_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | { 0x00, BYTE_OPER_REG_OP_ORDER, "add" }, |
| 41 | { 0x01, OPER_REG_OP_ORDER, "add" }, |
| 42 | { 0x02, BYTE_REG_OPER_OP_ORDER, "add" }, |
| 43 | { 0x03, REG_OPER_OP_ORDER, "add" }, |
| 44 | { 0x08, BYTE_OPER_REG_OP_ORDER, "or" }, |
| 45 | { 0x09, OPER_REG_OP_ORDER, "or" }, |
| 46 | { 0x0A, BYTE_REG_OPER_OP_ORDER, "or" }, |
| 47 | { 0x0B, REG_OPER_OP_ORDER, "or" }, |
| 48 | { 0x10, BYTE_OPER_REG_OP_ORDER, "adc" }, |
| 49 | { 0x11, OPER_REG_OP_ORDER, "adc" }, |
| 50 | { 0x12, BYTE_REG_OPER_OP_ORDER, "adc" }, |
| 51 | { 0x13, REG_OPER_OP_ORDER, "adc" }, |
| 52 | { 0x18, BYTE_OPER_REG_OP_ORDER, "sbb" }, |
| 53 | { 0x19, OPER_REG_OP_ORDER, "sbb" }, |
| 54 | { 0x1A, BYTE_REG_OPER_OP_ORDER, "sbb" }, |
| 55 | { 0x1B, REG_OPER_OP_ORDER, "sbb" }, |
| 56 | { 0x20, BYTE_OPER_REG_OP_ORDER, "and" }, |
| 57 | { 0x21, OPER_REG_OP_ORDER, "and" }, |
| 58 | { 0x22, BYTE_REG_OPER_OP_ORDER, "and" }, |
| 59 | { 0x23, REG_OPER_OP_ORDER, "and" }, |
| 60 | { 0x28, BYTE_OPER_REG_OP_ORDER, "sub" }, |
| 61 | { 0x29, OPER_REG_OP_ORDER, "sub" }, |
| 62 | { 0x2A, BYTE_REG_OPER_OP_ORDER, "sub" }, |
| 63 | { 0x2B, REG_OPER_OP_ORDER, "sub" }, |
| 64 | { 0x30, BYTE_OPER_REG_OP_ORDER, "xor" }, |
| 65 | { 0x31, OPER_REG_OP_ORDER, "xor" }, |
| 66 | { 0x32, BYTE_REG_OPER_OP_ORDER, "xor" }, |
| 67 | { 0x33, REG_OPER_OP_ORDER, "xor" }, |
| 68 | { 0x38, BYTE_OPER_REG_OP_ORDER, "cmp" }, |
| 69 | { 0x39, OPER_REG_OP_ORDER, "cmp" }, |
| 70 | { 0x3A, BYTE_REG_OPER_OP_ORDER, "cmp" }, |
| 71 | { 0x3B, REG_OPER_OP_ORDER, "cmp" }, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 72 | { 0x63, REG_OPER_OP_ORDER, "movsxl" }, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 73 | { 0x84, BYTE_REG_OPER_OP_ORDER, "test" }, |
| 74 | { 0x85, REG_OPER_OP_ORDER, "test" }, |
| 75 | { 0x86, BYTE_REG_OPER_OP_ORDER, "xchg" }, |
| 76 | { 0x87, REG_OPER_OP_ORDER, "xchg" }, |
| 77 | { 0x88, BYTE_OPER_REG_OP_ORDER, "mov" }, |
| 78 | { 0x89, OPER_REG_OP_ORDER, "mov" }, |
| 79 | { 0x8A, BYTE_REG_OPER_OP_ORDER, "mov" }, |
| 80 | { 0x8B, REG_OPER_OP_ORDER, "mov" }, |
| 81 | { 0x8D, REG_OPER_OP_ORDER, "lea" }, |
| 82 | { -1, UNSET_OP_ORDER, "" } |
| 83 | }; |
| 84 | |
| 85 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 86 | static const ByteMnemonic zero_operands_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 87 | { 0xC3, UNSET_OP_ORDER, "ret" }, |
| 88 | { 0xC9, UNSET_OP_ORDER, "leave" }, |
| 89 | { 0xF4, UNSET_OP_ORDER, "hlt" }, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 90 | { 0xFC, UNSET_OP_ORDER, "cld" }, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 91 | { 0xCC, UNSET_OP_ORDER, "int3" }, |
| 92 | { 0x60, UNSET_OP_ORDER, "pushad" }, |
| 93 | { 0x61, UNSET_OP_ORDER, "popad" }, |
| 94 | { 0x9C, UNSET_OP_ORDER, "pushfd" }, |
| 95 | { 0x9D, UNSET_OP_ORDER, "popfd" }, |
| 96 | { 0x9E, UNSET_OP_ORDER, "sahf" }, |
| 97 | { 0x99, UNSET_OP_ORDER, "cdq" }, |
| 98 | { 0x9B, UNSET_OP_ORDER, "fwait" }, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 99 | { 0xA4, UNSET_OP_ORDER, "movs" }, |
| 100 | { 0xA5, UNSET_OP_ORDER, "movs" }, |
| 101 | { 0xA6, UNSET_OP_ORDER, "cmps" }, |
| 102 | { 0xA7, UNSET_OP_ORDER, "cmps" }, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 103 | { -1, UNSET_OP_ORDER, "" } |
| 104 | }; |
| 105 | |
| 106 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 107 | static const ByteMnemonic call_jump_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 108 | { 0xE8, UNSET_OP_ORDER, "call" }, |
| 109 | { 0xE9, UNSET_OP_ORDER, "jmp" }, |
| 110 | { -1, UNSET_OP_ORDER, "" } |
| 111 | }; |
| 112 | |
| 113 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 114 | static const ByteMnemonic short_immediate_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 115 | { 0x05, UNSET_OP_ORDER, "add" }, |
| 116 | { 0x0D, UNSET_OP_ORDER, "or" }, |
| 117 | { 0x15, UNSET_OP_ORDER, "adc" }, |
| 118 | { 0x1D, UNSET_OP_ORDER, "sbb" }, |
| 119 | { 0x25, UNSET_OP_ORDER, "and" }, |
| 120 | { 0x2D, UNSET_OP_ORDER, "sub" }, |
| 121 | { 0x35, UNSET_OP_ORDER, "xor" }, |
| 122 | { 0x3D, UNSET_OP_ORDER, "cmp" }, |
| 123 | { -1, UNSET_OP_ORDER, "" } |
| 124 | }; |
| 125 | |
| 126 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 127 | static const char* const conditional_code_suffix[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | "o", "no", "c", "nc", "z", "nz", "na", "a", |
| 129 | "s", "ns", "pe", "po", "l", "ge", "le", "g" |
| 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 | PUSHPOP_INSTR, // Has implicit 64-bit operand size. |
| 140 | MOVE_REG_INSTR, |
| 141 | CALL_JUMP_INSTR, |
| 142 | SHORT_IMMEDIATE_INSTR |
| 143 | }; |
| 144 | |
| 145 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 146 | enum Prefixes { |
| 147 | ESCAPE_PREFIX = 0x0F, |
| 148 | OPERAND_SIZE_OVERRIDE_PREFIX = 0x66, |
| 149 | ADDRESS_SIZE_OVERRIDE_PREFIX = 0x67, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 150 | VEX3_PREFIX = 0xC4, |
| 151 | VEX2_PREFIX = 0xC5, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 152 | REPNE_PREFIX = 0xF2, |
| 153 | REP_PREFIX = 0xF3, |
| 154 | REPEQ_PREFIX = REP_PREFIX |
| 155 | }; |
| 156 | |
| 157 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 158 | struct InstructionDesc { |
| 159 | const char* mnem; |
| 160 | InstructionType type; |
| 161 | OperandType op_order_; |
| 162 | bool byte_size_operation; // Fixed 8-bit operation. |
| 163 | }; |
| 164 | |
| 165 | |
| 166 | class InstructionTable { |
| 167 | public: |
| 168 | InstructionTable(); |
| 169 | const InstructionDesc& Get(byte x) const { |
| 170 | return instructions_[x]; |
| 171 | } |
| 172 | |
| 173 | private: |
| 174 | InstructionDesc instructions_[256]; |
| 175 | void Clear(); |
| 176 | void Init(); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 177 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 178 | void SetTableRange(InstructionType type, byte start, byte end, bool byte_size, |
| 179 | const char* mnem); |
| 180 | void AddJumpConditionalShort(); |
| 181 | }; |
| 182 | |
| 183 | |
| 184 | InstructionTable::InstructionTable() { |
| 185 | Clear(); |
| 186 | Init(); |
| 187 | } |
| 188 | |
| 189 | |
| 190 | void InstructionTable::Clear() { |
| 191 | for (int i = 0; i < 256; i++) { |
| 192 | instructions_[i].mnem = "(bad)"; |
| 193 | instructions_[i].type = NO_INSTR; |
| 194 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 195 | instructions_[i].byte_size_operation = false; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | |
| 200 | void InstructionTable::Init() { |
| 201 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 202 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 203 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 204 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
| 205 | AddJumpConditionalShort(); |
| 206 | SetTableRange(PUSHPOP_INSTR, 0x50, 0x57, false, "push"); |
| 207 | SetTableRange(PUSHPOP_INSTR, 0x58, 0x5F, false, "pop"); |
| 208 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, false, "mov"); |
| 209 | } |
| 210 | |
| 211 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 212 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 213 | InstructionType type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 214 | for (int i = 0; bm[i].b >= 0; i++) { |
| 215 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 216 | id->mnem = bm[i].mnem; |
| 217 | OperandType op_order = bm[i].op_order_; |
| 218 | id->op_order_ = |
| 219 | static_cast<OperandType>(op_order & ~BYTE_SIZE_OPERAND_FLAG); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 220 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 221 | id->type = type; |
| 222 | id->byte_size_operation = ((op_order & BYTE_SIZE_OPERAND_FLAG) != 0); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | |
| 227 | void InstructionTable::SetTableRange(InstructionType type, |
| 228 | byte start, |
| 229 | byte end, |
| 230 | bool byte_size, |
| 231 | const char* mnem) { |
| 232 | for (byte b = start; b <= end; b++) { |
| 233 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 234 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 235 | id->mnem = mnem; |
| 236 | id->type = type; |
| 237 | id->byte_size_operation = byte_size; |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | |
| 242 | void InstructionTable::AddJumpConditionalShort() { |
| 243 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 244 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 245 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 246 | id->mnem = NULL; // Computed depending on condition code. |
| 247 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | static v8::base::LazyInstance<InstructionTable>::type instruction_table = |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 253 | LAZY_INSTANCE_INITIALIZER; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 254 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 255 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 256 | static const InstructionDesc cmov_instructions[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 257 | {"cmovo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 258 | {"cmovno", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 259 | {"cmovc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 260 | {"cmovnc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 261 | {"cmovz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 262 | {"cmovnz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 263 | {"cmovna", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 264 | {"cmova", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 265 | {"cmovs", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 266 | {"cmovns", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 267 | {"cmovpe", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 268 | {"cmovpo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 269 | {"cmovl", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 270 | {"cmovge", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 271 | {"cmovle", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 272 | {"cmovg", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false} |
| 273 | }; |
| 274 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 275 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 276 | //------------------------------------------------------------------------------ |
| 277 | // DisassemblerX64 implementation. |
| 278 | |
| 279 | enum UnimplementedOpcodeAction { |
| 280 | CONTINUE_ON_UNIMPLEMENTED_OPCODE, |
| 281 | ABORT_ON_UNIMPLEMENTED_OPCODE |
| 282 | }; |
| 283 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 284 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 285 | // A new DisassemblerX64 object is created to disassemble each instruction. |
| 286 | // The object can only disassemble a single instruction. |
| 287 | class DisassemblerX64 { |
| 288 | public: |
| 289 | DisassemblerX64(const NameConverter& converter, |
| 290 | UnimplementedOpcodeAction unimplemented_action = |
| 291 | ABORT_ON_UNIMPLEMENTED_OPCODE) |
| 292 | : converter_(converter), |
| 293 | tmp_buffer_pos_(0), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 294 | abort_on_unimplemented_(unimplemented_action == |
| 295 | ABORT_ON_UNIMPLEMENTED_OPCODE), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 296 | rex_(0), |
| 297 | operand_size_(0), |
| 298 | group_1_prefix_(0), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 299 | vex_byte0_(0), |
| 300 | vex_byte1_(0), |
| 301 | vex_byte2_(0), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 302 | byte_size_operand_(false), |
| 303 | instruction_table_(instruction_table.Pointer()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 304 | tmp_buffer_[0] = '\0'; |
| 305 | } |
| 306 | |
| 307 | virtual ~DisassemblerX64() { |
| 308 | } |
| 309 | |
| 310 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 311 | // Returns the length of the disassembled machine instruction in bytes. |
| 312 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 313 | |
| 314 | private: |
| 315 | enum OperandSize { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 316 | OPERAND_BYTE_SIZE = 0, |
| 317 | OPERAND_WORD_SIZE = 1, |
| 318 | OPERAND_DOUBLEWORD_SIZE = 2, |
| 319 | OPERAND_QUADWORD_SIZE = 3 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 320 | }; |
| 321 | |
| 322 | const NameConverter& converter_; |
| 323 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 324 | unsigned int tmp_buffer_pos_; |
| 325 | bool abort_on_unimplemented_; |
| 326 | // Prefixes parsed |
| 327 | byte rex_; |
| 328 | byte operand_size_; // 0x66 or (if no group 3 prefix is present) 0x0. |
| 329 | byte group_1_prefix_; // 0xF2, 0xF3, or (if no group 1 prefix is present) 0. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 330 | byte vex_byte0_; // 0xc4 or 0xc5 |
| 331 | byte vex_byte1_; |
| 332 | byte vex_byte2_; // only for 3 bytes vex prefix |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 333 | // Byte size operand override. |
| 334 | bool byte_size_operand_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 335 | const InstructionTable* const instruction_table_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 336 | |
| 337 | void setRex(byte rex) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 338 | DCHECK_EQ(0x40, rex & 0xF0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 339 | rex_ = rex; |
| 340 | } |
| 341 | |
| 342 | bool rex() { return rex_ != 0; } |
| 343 | |
| 344 | bool rex_b() { return (rex_ & 0x01) != 0; } |
| 345 | |
| 346 | // Actual number of base register given the low bits and the rex.b state. |
| 347 | int base_reg(int low_bits) { return low_bits | ((rex_ & 0x01) << 3); } |
| 348 | |
| 349 | bool rex_x() { return (rex_ & 0x02) != 0; } |
| 350 | |
| 351 | bool rex_r() { return (rex_ & 0x04) != 0; } |
| 352 | |
| 353 | bool rex_w() { return (rex_ & 0x08) != 0; } |
| 354 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 355 | bool vex_w() { |
| 356 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 357 | return vex_byte0_ == VEX3_PREFIX ? (vex_byte2_ & 0x80) != 0 : false; |
| 358 | } |
| 359 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 360 | bool vex_128() { |
| 361 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 362 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 363 | return (checked & 4) == 0; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 364 | } |
| 365 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 366 | bool vex_none() { |
| 367 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 368 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 369 | return (checked & 3) == 0; |
| 370 | } |
| 371 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 372 | bool vex_66() { |
| 373 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 374 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 375 | return (checked & 3) == 1; |
| 376 | } |
| 377 | |
| 378 | bool vex_f3() { |
| 379 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 380 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 381 | return (checked & 3) == 2; |
| 382 | } |
| 383 | |
| 384 | bool vex_f2() { |
| 385 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 386 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 387 | return (checked & 3) == 3; |
| 388 | } |
| 389 | |
| 390 | bool vex_0f() { |
| 391 | if (vex_byte0_ == VEX2_PREFIX) return true; |
| 392 | return (vex_byte1_ & 3) == 1; |
| 393 | } |
| 394 | |
| 395 | bool vex_0f38() { |
| 396 | if (vex_byte0_ == VEX2_PREFIX) return false; |
| 397 | return (vex_byte1_ & 3) == 2; |
| 398 | } |
| 399 | |
| 400 | bool vex_0f3a() { |
| 401 | if (vex_byte0_ == VEX2_PREFIX) return false; |
| 402 | return (vex_byte1_ & 3) == 3; |
| 403 | } |
| 404 | |
| 405 | int vex_vreg() { |
| 406 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 407 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 408 | return ~(checked >> 3) & 0xf; |
| 409 | } |
| 410 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 411 | OperandSize operand_size() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 412 | if (byte_size_operand_) return OPERAND_BYTE_SIZE; |
| 413 | if (rex_w()) return OPERAND_QUADWORD_SIZE; |
| 414 | if (operand_size_ != 0) return OPERAND_WORD_SIZE; |
| 415 | return OPERAND_DOUBLEWORD_SIZE; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | char operand_size_code() { |
| 419 | return "bwlq"[operand_size()]; |
| 420 | } |
| 421 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 422 | char float_size_code() { return "sd"[rex_w()]; } |
| 423 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 424 | const char* NameOfCPURegister(int reg) const { |
| 425 | return converter_.NameOfCPURegister(reg); |
| 426 | } |
| 427 | |
| 428 | const char* NameOfByteCPURegister(int reg) const { |
| 429 | return converter_.NameOfByteCPURegister(reg); |
| 430 | } |
| 431 | |
| 432 | const char* NameOfXMMRegister(int reg) const { |
| 433 | return converter_.NameOfXMMRegister(reg); |
| 434 | } |
| 435 | |
| 436 | const char* NameOfAddress(byte* addr) const { |
| 437 | return converter_.NameOfAddress(addr); |
| 438 | } |
| 439 | |
| 440 | // Disassembler helper functions. |
| 441 | void get_modrm(byte data, |
| 442 | int* mod, |
| 443 | int* regop, |
| 444 | int* rm) { |
| 445 | *mod = (data >> 6) & 3; |
| 446 | *regop = ((data & 0x38) >> 3) | (rex_r() ? 8 : 0); |
| 447 | *rm = (data & 7) | (rex_b() ? 8 : 0); |
| 448 | } |
| 449 | |
| 450 | void get_sib(byte data, |
| 451 | int* scale, |
| 452 | int* index, |
| 453 | int* base) { |
| 454 | *scale = (data >> 6) & 3; |
| 455 | *index = ((data >> 3) & 7) | (rex_x() ? 8 : 0); |
| 456 | *base = (data & 7) | (rex_b() ? 8 : 0); |
| 457 | } |
| 458 | |
| 459 | typedef const char* (DisassemblerX64::*RegisterNameMapping)(int reg) const; |
| 460 | |
| 461 | int PrintRightOperandHelper(byte* modrmp, |
| 462 | RegisterNameMapping register_name); |
| 463 | int PrintRightOperand(byte* modrmp); |
| 464 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 465 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 466 | int PrintOperands(const char* mnem, |
| 467 | OperandType op_order, |
| 468 | byte* data); |
| 469 | int PrintImmediate(byte* data, OperandSize size); |
| 470 | int PrintImmediateOp(byte* data); |
| 471 | const char* TwoByteMnemonic(byte opcode); |
| 472 | int TwoByteOpcodeInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 473 | int F6F7Instruction(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 474 | int ShiftInstruction(byte* data); |
| 475 | int JumpShort(byte* data); |
| 476 | int JumpConditional(byte* data); |
| 477 | int JumpConditionalShort(byte* data); |
| 478 | int SetCC(byte* data); |
| 479 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 480 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 481 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 482 | int AVXInstruction(byte* data); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 483 | PRINTF_FORMAT(2, 3) void AppendToBuffer(const char* format, ...); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 484 | |
| 485 | void UnimplementedInstruction() { |
| 486 | if (abort_on_unimplemented_) { |
| 487 | CHECK(false); |
| 488 | } else { |
| 489 | AppendToBuffer("'Unimplemented Instruction'"); |
| 490 | } |
| 491 | } |
| 492 | }; |
| 493 | |
| 494 | |
| 495 | void DisassemblerX64::AppendToBuffer(const char* format, ...) { |
| 496 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 497 | va_list args; |
| 498 | va_start(args, format); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 499 | int result = v8::internal::VSNPrintF(buf, format, args); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 500 | va_end(args); |
| 501 | tmp_buffer_pos_ += result; |
| 502 | } |
| 503 | |
| 504 | |
| 505 | int DisassemblerX64::PrintRightOperandHelper( |
| 506 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 507 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 508 | int mod, regop, rm; |
| 509 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 510 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 511 | &DisassemblerX64::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 512 | switch (mod) { |
| 513 | case 0: |
| 514 | if ((rm & 7) == 5) { |
| 515 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 516 | AppendToBuffer("[rip+0x%x]", disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 517 | return 5; |
| 518 | } else if ((rm & 7) == 4) { |
| 519 | // Codes for SIB byte. |
| 520 | byte sib = *(modrmp + 1); |
| 521 | int scale, index, base; |
| 522 | get_sib(sib, &scale, &index, &base); |
| 523 | if (index == 4 && (base & 7) == 4 && scale == 0 /*times_1*/) { |
| 524 | // index == rsp means no index. Only use sib byte with no index for |
| 525 | // rsp and r12 base. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 526 | AppendToBuffer("[%s]", NameOfCPURegister(base)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 527 | return 2; |
| 528 | } else if (base == 5) { |
| 529 | // base == rbp means no base register (when mod == 0). |
| 530 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 531 | AppendToBuffer("[%s*%d%s0x%x]", |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 532 | NameOfCPURegister(index), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 533 | 1 << scale, |
| 534 | disp < 0 ? "-" : "+", |
| 535 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 536 | return 6; |
| 537 | } else if (index != 4 && base != 5) { |
| 538 | // [base+index*scale] |
| 539 | AppendToBuffer("[%s+%s*%d]", |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 540 | NameOfCPURegister(base), |
| 541 | NameOfCPURegister(index), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 542 | 1 << scale); |
| 543 | return 2; |
| 544 | } else { |
| 545 | UnimplementedInstruction(); |
| 546 | return 1; |
| 547 | } |
| 548 | } else { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 549 | AppendToBuffer("[%s]", NameOfCPURegister(rm)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 550 | return 1; |
| 551 | } |
| 552 | break; |
| 553 | case 1: // fall through |
| 554 | case 2: |
| 555 | if ((rm & 7) == 4) { |
| 556 | byte sib = *(modrmp + 1); |
| 557 | int scale, index, base; |
| 558 | get_sib(sib, &scale, &index, &base); |
| 559 | int disp = (mod == 2) ? *reinterpret_cast<int32_t*>(modrmp + 2) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 560 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 561 | if (index == 4 && (base & 7) == 4 && scale == 0 /*times_1*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 562 | AppendToBuffer("[%s%s0x%x]", |
| 563 | NameOfCPURegister(base), |
| 564 | disp < 0 ? "-" : "+", |
| 565 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 566 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 567 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
| 568 | NameOfCPURegister(base), |
| 569 | NameOfCPURegister(index), |
| 570 | 1 << scale, |
| 571 | disp < 0 ? "-" : "+", |
| 572 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 573 | } |
| 574 | return mod == 2 ? 6 : 3; |
| 575 | } else { |
| 576 | // No sib. |
| 577 | int disp = (mod == 2) ? *reinterpret_cast<int32_t*>(modrmp + 1) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 578 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 579 | AppendToBuffer("[%s%s0x%x]", |
| 580 | NameOfCPURegister(rm), |
| 581 | disp < 0 ? "-" : "+", |
| 582 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 583 | return (mod == 2) ? 5 : 2; |
| 584 | } |
| 585 | break; |
| 586 | case 3: |
| 587 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 588 | return 1; |
| 589 | default: |
| 590 | UnimplementedInstruction(); |
| 591 | return 1; |
| 592 | } |
| 593 | UNREACHABLE(); |
| 594 | } |
| 595 | |
| 596 | |
| 597 | int DisassemblerX64::PrintImmediate(byte* data, OperandSize size) { |
| 598 | int64_t value; |
| 599 | int count; |
| 600 | switch (size) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 601 | case OPERAND_BYTE_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 602 | value = *data; |
| 603 | count = 1; |
| 604 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 605 | case OPERAND_WORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 606 | value = *reinterpret_cast<int16_t*>(data); |
| 607 | count = 2; |
| 608 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 609 | case OPERAND_DOUBLEWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 610 | value = *reinterpret_cast<uint32_t*>(data); |
| 611 | count = 4; |
| 612 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 613 | case OPERAND_QUADWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 614 | value = *reinterpret_cast<int32_t*>(data); |
| 615 | count = 4; |
| 616 | break; |
| 617 | default: |
| 618 | UNREACHABLE(); |
| 619 | value = 0; // Initialize variables on all paths to satisfy the compiler. |
| 620 | count = 0; |
| 621 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 622 | AppendToBuffer("%" PRIx64, value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 623 | return count; |
| 624 | } |
| 625 | |
| 626 | |
| 627 | int DisassemblerX64::PrintRightOperand(byte* modrmp) { |
| 628 | return PrintRightOperandHelper(modrmp, |
| 629 | &DisassemblerX64::NameOfCPURegister); |
| 630 | } |
| 631 | |
| 632 | |
| 633 | int DisassemblerX64::PrintRightByteOperand(byte* modrmp) { |
| 634 | return PrintRightOperandHelper(modrmp, |
| 635 | &DisassemblerX64::NameOfByteCPURegister); |
| 636 | } |
| 637 | |
| 638 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 639 | int DisassemblerX64::PrintRightXMMOperand(byte* modrmp) { |
| 640 | return PrintRightOperandHelper(modrmp, |
| 641 | &DisassemblerX64::NameOfXMMRegister); |
| 642 | } |
| 643 | |
| 644 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 645 | // Returns number of bytes used including the current *data. |
| 646 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 647 | int DisassemblerX64::PrintOperands(const char* mnem, |
| 648 | OperandType op_order, |
| 649 | byte* data) { |
| 650 | byte modrm = *data; |
| 651 | int mod, regop, rm; |
| 652 | get_modrm(modrm, &mod, ®op, &rm); |
| 653 | int advance = 0; |
| 654 | const char* register_name = |
| 655 | byte_size_operand_ ? NameOfByteCPURegister(regop) |
| 656 | : NameOfCPURegister(regop); |
| 657 | switch (op_order) { |
| 658 | case REG_OPER_OP_ORDER: { |
| 659 | AppendToBuffer("%s%c %s,", |
| 660 | mnem, |
| 661 | operand_size_code(), |
| 662 | register_name); |
| 663 | advance = byte_size_operand_ ? PrintRightByteOperand(data) |
| 664 | : PrintRightOperand(data); |
| 665 | break; |
| 666 | } |
| 667 | case OPER_REG_OP_ORDER: { |
| 668 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 669 | advance = byte_size_operand_ ? PrintRightByteOperand(data) |
| 670 | : PrintRightOperand(data); |
| 671 | AppendToBuffer(",%s", register_name); |
| 672 | break; |
| 673 | } |
| 674 | default: |
| 675 | UNREACHABLE(); |
| 676 | break; |
| 677 | } |
| 678 | return advance; |
| 679 | } |
| 680 | |
| 681 | |
| 682 | // Returns number of bytes used by machine instruction, including *data byte. |
| 683 | // Writes immediate instructions to 'tmp_buffer_'. |
| 684 | int DisassemblerX64::PrintImmediateOp(byte* data) { |
| 685 | bool byte_size_immediate = (*data & 0x02) != 0; |
| 686 | byte modrm = *(data + 1); |
| 687 | int mod, regop, rm; |
| 688 | get_modrm(modrm, &mod, ®op, &rm); |
| 689 | const char* mnem = "Imm???"; |
| 690 | switch (regop) { |
| 691 | case 0: |
| 692 | mnem = "add"; |
| 693 | break; |
| 694 | case 1: |
| 695 | mnem = "or"; |
| 696 | break; |
| 697 | case 2: |
| 698 | mnem = "adc"; |
| 699 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 700 | case 3: |
| 701 | mnem = "sbb"; |
| 702 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 703 | case 4: |
| 704 | mnem = "and"; |
| 705 | break; |
| 706 | case 5: |
| 707 | mnem = "sub"; |
| 708 | break; |
| 709 | case 6: |
| 710 | mnem = "xor"; |
| 711 | break; |
| 712 | case 7: |
| 713 | mnem = "cmp"; |
| 714 | break; |
| 715 | default: |
| 716 | UnimplementedInstruction(); |
| 717 | } |
| 718 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 719 | int count = PrintRightOperand(data + 1); |
| 720 | AppendToBuffer(",0x"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 721 | OperandSize immediate_size = |
| 722 | byte_size_immediate ? OPERAND_BYTE_SIZE : operand_size(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 723 | count += PrintImmediate(data + 1 + count, immediate_size); |
| 724 | return 1 + count; |
| 725 | } |
| 726 | |
| 727 | |
| 728 | // Returns number of bytes used, including *data. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 729 | int DisassemblerX64::F6F7Instruction(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 730 | DCHECK(*data == 0xF7 || *data == 0xF6); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 731 | byte modrm = *(data + 1); |
| 732 | int mod, regop, rm; |
| 733 | get_modrm(modrm, &mod, ®op, &rm); |
| 734 | if (mod == 3 && regop != 0) { |
| 735 | const char* mnem = NULL; |
| 736 | switch (regop) { |
| 737 | case 2: |
| 738 | mnem = "not"; |
| 739 | break; |
| 740 | case 3: |
| 741 | mnem = "neg"; |
| 742 | break; |
| 743 | case 4: |
| 744 | mnem = "mul"; |
| 745 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 746 | case 5: |
| 747 | mnem = "imul"; |
| 748 | break; |
| 749 | case 6: |
| 750 | mnem = "div"; |
| 751 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 752 | case 7: |
| 753 | mnem = "idiv"; |
| 754 | break; |
| 755 | default: |
| 756 | UnimplementedInstruction(); |
| 757 | } |
| 758 | AppendToBuffer("%s%c %s", |
| 759 | mnem, |
| 760 | operand_size_code(), |
| 761 | NameOfCPURegister(rm)); |
| 762 | return 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 763 | } else if (regop == 0) { |
| 764 | AppendToBuffer("test%c ", operand_size_code()); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 765 | int count = PrintRightOperand(data + 1); // Use name of 64-bit register. |
| 766 | AppendToBuffer(",0x"); |
| 767 | count += PrintImmediate(data + 1 + count, operand_size()); |
| 768 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 769 | } else { |
| 770 | UnimplementedInstruction(); |
| 771 | return 2; |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | |
| 776 | int DisassemblerX64::ShiftInstruction(byte* data) { |
| 777 | byte op = *data & (~1); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 778 | int count = 1; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 779 | if (op != 0xD0 && op != 0xD2 && op != 0xC0) { |
| 780 | UnimplementedInstruction(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 781 | return count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 782 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 783 | // Print mneumonic. |
| 784 | { |
| 785 | byte modrm = *(data + count); |
| 786 | int mod, regop, rm; |
| 787 | get_modrm(modrm, &mod, ®op, &rm); |
| 788 | regop &= 0x7; // The REX.R bit does not affect the operation. |
| 789 | const char* mnem = NULL; |
| 790 | switch (regop) { |
| 791 | case 0: |
| 792 | mnem = "rol"; |
| 793 | break; |
| 794 | case 1: |
| 795 | mnem = "ror"; |
| 796 | break; |
| 797 | case 2: |
| 798 | mnem = "rcl"; |
| 799 | break; |
| 800 | case 3: |
| 801 | mnem = "rcr"; |
| 802 | break; |
| 803 | case 4: |
| 804 | mnem = "shl"; |
| 805 | break; |
| 806 | case 5: |
| 807 | mnem = "shr"; |
| 808 | break; |
| 809 | case 7: |
| 810 | mnem = "sar"; |
| 811 | break; |
| 812 | default: |
| 813 | UnimplementedInstruction(); |
| 814 | return count + 1; |
| 815 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 816 | DCHECK_NOT_NULL(mnem); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 817 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 818 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 819 | count += PrintRightOperand(data + count); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 820 | if (op == 0xD2) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 821 | AppendToBuffer(", cl"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 822 | } else { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 823 | int imm8 = -1; |
| 824 | if (op == 0xD0) { |
| 825 | imm8 = 1; |
| 826 | } else { |
| 827 | DCHECK_EQ(0xC0, op); |
| 828 | imm8 = *(data + count); |
| 829 | count++; |
| 830 | } |
| 831 | AppendToBuffer(", %d", imm8); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 832 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 833 | return count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 834 | } |
| 835 | |
| 836 | |
| 837 | // Returns number of bytes used, including *data. |
| 838 | int DisassemblerX64::JumpShort(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 839 | DCHECK_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 840 | byte b = *(data + 1); |
| 841 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 842 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 843 | return 2; |
| 844 | } |
| 845 | |
| 846 | |
| 847 | // Returns number of bytes used, including *data. |
| 848 | int DisassemblerX64::JumpConditional(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 849 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 850 | byte cond = *(data + 1) & 0x0F; |
| 851 | byte* dest = data + *reinterpret_cast<int32_t*>(data + 2) + 6; |
| 852 | const char* mnem = conditional_code_suffix[cond]; |
| 853 | AppendToBuffer("j%s %s", mnem, NameOfAddress(dest)); |
| 854 | return 6; // includes 0x0F |
| 855 | } |
| 856 | |
| 857 | |
| 858 | // Returns number of bytes used, including *data. |
| 859 | int DisassemblerX64::JumpConditionalShort(byte* data) { |
| 860 | byte cond = *data & 0x0F; |
| 861 | byte b = *(data + 1); |
| 862 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 863 | const char* mnem = conditional_code_suffix[cond]; |
| 864 | AppendToBuffer("j%s %s", mnem, NameOfAddress(dest)); |
| 865 | return 2; |
| 866 | } |
| 867 | |
| 868 | |
| 869 | // Returns number of bytes used, including *data. |
| 870 | int DisassemblerX64::SetCC(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 871 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 872 | byte cond = *(data + 1) & 0x0F; |
| 873 | const char* mnem = conditional_code_suffix[cond]; |
| 874 | AppendToBuffer("set%s%c ", mnem, operand_size_code()); |
| 875 | PrintRightByteOperand(data + 2); |
| 876 | return 3; // includes 0x0F |
| 877 | } |
| 878 | |
| 879 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 880 | int DisassemblerX64::AVXInstruction(byte* data) { |
| 881 | byte opcode = *data; |
| 882 | byte* current = data + 1; |
| 883 | if (vex_66() && vex_0f38()) { |
| 884 | int mod, regop, rm, vvvv = vex_vreg(); |
| 885 | get_modrm(*current, &mod, ®op, &rm); |
| 886 | switch (opcode) { |
| 887 | case 0x99: |
| 888 | AppendToBuffer("vfmadd132s%c %s,%s,", float_size_code(), |
| 889 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 890 | current += PrintRightXMMOperand(current); |
| 891 | break; |
| 892 | case 0xa9: |
| 893 | AppendToBuffer("vfmadd213s%c %s,%s,", float_size_code(), |
| 894 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 895 | current += PrintRightXMMOperand(current); |
| 896 | break; |
| 897 | case 0xb9: |
| 898 | AppendToBuffer("vfmadd231s%c %s,%s,", float_size_code(), |
| 899 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 900 | current += PrintRightXMMOperand(current); |
| 901 | break; |
| 902 | case 0x9b: |
| 903 | AppendToBuffer("vfmsub132s%c %s,%s,", float_size_code(), |
| 904 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 905 | current += PrintRightXMMOperand(current); |
| 906 | break; |
| 907 | case 0xab: |
| 908 | AppendToBuffer("vfmsub213s%c %s,%s,", float_size_code(), |
| 909 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 910 | current += PrintRightXMMOperand(current); |
| 911 | break; |
| 912 | case 0xbb: |
| 913 | AppendToBuffer("vfmsub231s%c %s,%s,", float_size_code(), |
| 914 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 915 | current += PrintRightXMMOperand(current); |
| 916 | break; |
| 917 | case 0x9d: |
| 918 | AppendToBuffer("vfnmadd132s%c %s,%s,", float_size_code(), |
| 919 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 920 | current += PrintRightXMMOperand(current); |
| 921 | break; |
| 922 | case 0xad: |
| 923 | AppendToBuffer("vfnmadd213s%c %s,%s,", float_size_code(), |
| 924 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 925 | current += PrintRightXMMOperand(current); |
| 926 | break; |
| 927 | case 0xbd: |
| 928 | AppendToBuffer("vfnmadd231s%c %s,%s,", float_size_code(), |
| 929 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 930 | current += PrintRightXMMOperand(current); |
| 931 | break; |
| 932 | case 0x9f: |
| 933 | AppendToBuffer("vfnmsub132s%c %s,%s,", float_size_code(), |
| 934 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 935 | current += PrintRightXMMOperand(current); |
| 936 | break; |
| 937 | case 0xaf: |
| 938 | AppendToBuffer("vfnmsub213s%c %s,%s,", float_size_code(), |
| 939 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 940 | current += PrintRightXMMOperand(current); |
| 941 | break; |
| 942 | case 0xbf: |
| 943 | AppendToBuffer("vfnmsub231s%c %s,%s,", float_size_code(), |
| 944 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 945 | current += PrintRightXMMOperand(current); |
| 946 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 947 | case 0xf7: |
| 948 | AppendToBuffer("shlx%c %s,", operand_size_code(), |
| 949 | NameOfCPURegister(regop)); |
| 950 | current += PrintRightOperand(current); |
| 951 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 952 | break; |
| 953 | default: |
| 954 | UnimplementedInstruction(); |
| 955 | } |
| 956 | } else if (vex_66() && vex_0f3a()) { |
| 957 | int mod, regop, rm, vvvv = vex_vreg(); |
| 958 | get_modrm(*current, &mod, ®op, &rm); |
| 959 | switch (opcode) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 960 | case 0x0a: |
| 961 | AppendToBuffer("vroundss %s,%s,", NameOfXMMRegister(regop), |
| 962 | NameOfXMMRegister(vvvv)); |
| 963 | current += PrintRightXMMOperand(current); |
| 964 | AppendToBuffer(",0x%x", *current++); |
| 965 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 966 | case 0x0b: |
| 967 | AppendToBuffer("vroundsd %s,%s,", NameOfXMMRegister(regop), |
| 968 | NameOfXMMRegister(vvvv)); |
| 969 | current += PrintRightXMMOperand(current); |
| 970 | AppendToBuffer(",0x%x", *current++); |
| 971 | break; |
| 972 | default: |
| 973 | UnimplementedInstruction(); |
| 974 | } |
| 975 | } else if (vex_f3() && vex_0f()) { |
| 976 | int mod, regop, rm, vvvv = vex_vreg(); |
| 977 | get_modrm(*current, &mod, ®op, &rm); |
| 978 | switch (opcode) { |
| 979 | case 0x10: |
| 980 | AppendToBuffer("vmovss %s,", NameOfXMMRegister(regop)); |
| 981 | if (mod == 3) { |
| 982 | AppendToBuffer("%s,", NameOfXMMRegister(vvvv)); |
| 983 | } |
| 984 | current += PrintRightXMMOperand(current); |
| 985 | break; |
| 986 | case 0x11: |
| 987 | AppendToBuffer("vmovss "); |
| 988 | current += PrintRightXMMOperand(current); |
| 989 | if (mod == 3) { |
| 990 | AppendToBuffer(",%s", NameOfXMMRegister(vvvv)); |
| 991 | } |
| 992 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 993 | break; |
| 994 | case 0x2a: |
| 995 | AppendToBuffer("%s %s,%s,", vex_w() ? "vcvtqsi2ss" : "vcvtlsi2ss", |
| 996 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 997 | current += PrintRightOperand(current); |
| 998 | break; |
| 999 | case 0x2c: |
| 1000 | AppendToBuffer("vcvttss2si%s %s,", vex_w() ? "q" : "", |
| 1001 | NameOfCPURegister(regop)); |
| 1002 | current += PrintRightXMMOperand(current); |
| 1003 | break; |
| 1004 | case 0x58: |
| 1005 | AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop), |
| 1006 | NameOfXMMRegister(vvvv)); |
| 1007 | current += PrintRightXMMOperand(current); |
| 1008 | break; |
| 1009 | case 0x59: |
| 1010 | AppendToBuffer("vmulss %s,%s,", NameOfXMMRegister(regop), |
| 1011 | NameOfXMMRegister(vvvv)); |
| 1012 | current += PrintRightXMMOperand(current); |
| 1013 | break; |
| 1014 | case 0x5a: |
| 1015 | AppendToBuffer("vcvtss2sd %s,%s,", NameOfXMMRegister(regop), |
| 1016 | NameOfXMMRegister(vvvv)); |
| 1017 | current += PrintRightXMMOperand(current); |
| 1018 | break; |
| 1019 | case 0x5c: |
| 1020 | AppendToBuffer("vsubss %s,%s,", NameOfXMMRegister(regop), |
| 1021 | NameOfXMMRegister(vvvv)); |
| 1022 | current += PrintRightXMMOperand(current); |
| 1023 | break; |
| 1024 | case 0x5d: |
| 1025 | AppendToBuffer("vminss %s,%s,", NameOfXMMRegister(regop), |
| 1026 | NameOfXMMRegister(vvvv)); |
| 1027 | current += PrintRightXMMOperand(current); |
| 1028 | break; |
| 1029 | case 0x5e: |
| 1030 | AppendToBuffer("vdivss %s,%s,", NameOfXMMRegister(regop), |
| 1031 | NameOfXMMRegister(vvvv)); |
| 1032 | current += PrintRightXMMOperand(current); |
| 1033 | break; |
| 1034 | case 0x5f: |
| 1035 | AppendToBuffer("vmaxss %s,%s,", NameOfXMMRegister(regop), |
| 1036 | NameOfXMMRegister(vvvv)); |
| 1037 | current += PrintRightXMMOperand(current); |
| 1038 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1039 | default: |
| 1040 | UnimplementedInstruction(); |
| 1041 | } |
| 1042 | } else if (vex_f2() && vex_0f()) { |
| 1043 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1044 | get_modrm(*current, &mod, ®op, &rm); |
| 1045 | switch (opcode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1046 | case 0x10: |
| 1047 | AppendToBuffer("vmovsd %s,", NameOfXMMRegister(regop)); |
| 1048 | if (mod == 3) { |
| 1049 | AppendToBuffer("%s,", NameOfXMMRegister(vvvv)); |
| 1050 | } |
| 1051 | current += PrintRightXMMOperand(current); |
| 1052 | break; |
| 1053 | case 0x11: |
| 1054 | AppendToBuffer("vmovsd "); |
| 1055 | current += PrintRightXMMOperand(current); |
| 1056 | if (mod == 3) { |
| 1057 | AppendToBuffer(",%s", NameOfXMMRegister(vvvv)); |
| 1058 | } |
| 1059 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1060 | break; |
| 1061 | case 0x2a: |
| 1062 | AppendToBuffer("%s %s,%s,", vex_w() ? "vcvtqsi2sd" : "vcvtlsi2sd", |
| 1063 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 1064 | current += PrintRightOperand(current); |
| 1065 | break; |
| 1066 | case 0x2c: |
| 1067 | AppendToBuffer("vcvttsd2si%s %s,", vex_w() ? "q" : "", |
| 1068 | NameOfCPURegister(regop)); |
| 1069 | current += PrintRightXMMOperand(current); |
| 1070 | break; |
| 1071 | case 0x2d: |
| 1072 | AppendToBuffer("vcvtsd2si%s %s,", vex_w() ? "q" : "", |
| 1073 | NameOfCPURegister(regop)); |
| 1074 | current += PrintRightXMMOperand(current); |
| 1075 | break; |
| 1076 | case 0x51: |
| 1077 | AppendToBuffer("vsqrtsd %s,%s,", NameOfXMMRegister(regop), |
| 1078 | NameOfXMMRegister(vvvv)); |
| 1079 | current += PrintRightXMMOperand(current); |
| 1080 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1081 | case 0x58: |
| 1082 | AppendToBuffer("vaddsd %s,%s,", NameOfXMMRegister(regop), |
| 1083 | NameOfXMMRegister(vvvv)); |
| 1084 | current += PrintRightXMMOperand(current); |
| 1085 | break; |
| 1086 | case 0x59: |
| 1087 | AppendToBuffer("vmulsd %s,%s,", NameOfXMMRegister(regop), |
| 1088 | NameOfXMMRegister(vvvv)); |
| 1089 | current += PrintRightXMMOperand(current); |
| 1090 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1091 | case 0x5a: |
| 1092 | AppendToBuffer("vcvtsd2ss %s,%s,", NameOfXMMRegister(regop), |
| 1093 | NameOfXMMRegister(vvvv)); |
| 1094 | current += PrintRightXMMOperand(current); |
| 1095 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1096 | case 0x5c: |
| 1097 | AppendToBuffer("vsubsd %s,%s,", NameOfXMMRegister(regop), |
| 1098 | NameOfXMMRegister(vvvv)); |
| 1099 | current += PrintRightXMMOperand(current); |
| 1100 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1101 | case 0x5d: |
| 1102 | AppendToBuffer("vminsd %s,%s,", NameOfXMMRegister(regop), |
| 1103 | NameOfXMMRegister(vvvv)); |
| 1104 | current += PrintRightXMMOperand(current); |
| 1105 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1106 | case 0x5e: |
| 1107 | AppendToBuffer("vdivsd %s,%s,", NameOfXMMRegister(regop), |
| 1108 | NameOfXMMRegister(vvvv)); |
| 1109 | current += PrintRightXMMOperand(current); |
| 1110 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1111 | case 0x5f: |
| 1112 | AppendToBuffer("vmaxsd %s,%s,", NameOfXMMRegister(regop), |
| 1113 | NameOfXMMRegister(vvvv)); |
| 1114 | current += PrintRightXMMOperand(current); |
| 1115 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1116 | default: |
| 1117 | UnimplementedInstruction(); |
| 1118 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1119 | } else if (vex_none() && vex_0f38()) { |
| 1120 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1121 | get_modrm(*current, &mod, ®op, &rm); |
| 1122 | const char* mnem = "?"; |
| 1123 | switch (opcode) { |
| 1124 | case 0xf2: |
| 1125 | AppendToBuffer("andn%c %s,%s,", operand_size_code(), |
| 1126 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1127 | current += PrintRightOperand(current); |
| 1128 | break; |
| 1129 | case 0xf5: |
| 1130 | AppendToBuffer("bzhi%c %s,", operand_size_code(), |
| 1131 | NameOfCPURegister(regop)); |
| 1132 | current += PrintRightOperand(current); |
| 1133 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1134 | break; |
| 1135 | case 0xf7: |
| 1136 | AppendToBuffer("bextr%c %s,", operand_size_code(), |
| 1137 | NameOfCPURegister(regop)); |
| 1138 | current += PrintRightOperand(current); |
| 1139 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1140 | break; |
| 1141 | case 0xf3: |
| 1142 | switch (regop) { |
| 1143 | case 1: |
| 1144 | mnem = "blsr"; |
| 1145 | break; |
| 1146 | case 2: |
| 1147 | mnem = "blsmsk"; |
| 1148 | break; |
| 1149 | case 3: |
| 1150 | mnem = "blsi"; |
| 1151 | break; |
| 1152 | default: |
| 1153 | UnimplementedInstruction(); |
| 1154 | } |
| 1155 | AppendToBuffer("%s%c %s,", mnem, operand_size_code(), |
| 1156 | NameOfCPURegister(vvvv)); |
| 1157 | current += PrintRightOperand(current); |
| 1158 | mnem = "?"; |
| 1159 | break; |
| 1160 | default: |
| 1161 | UnimplementedInstruction(); |
| 1162 | } |
| 1163 | } else if (vex_f2() && vex_0f38()) { |
| 1164 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1165 | get_modrm(*current, &mod, ®op, &rm); |
| 1166 | switch (opcode) { |
| 1167 | case 0xf5: |
| 1168 | AppendToBuffer("pdep%c %s,%s,", operand_size_code(), |
| 1169 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1170 | current += PrintRightOperand(current); |
| 1171 | break; |
| 1172 | case 0xf6: |
| 1173 | AppendToBuffer("mulx%c %s,%s,", operand_size_code(), |
| 1174 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1175 | current += PrintRightOperand(current); |
| 1176 | break; |
| 1177 | case 0xf7: |
| 1178 | AppendToBuffer("shrx%c %s,", operand_size_code(), |
| 1179 | NameOfCPURegister(regop)); |
| 1180 | current += PrintRightOperand(current); |
| 1181 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1182 | break; |
| 1183 | default: |
| 1184 | UnimplementedInstruction(); |
| 1185 | } |
| 1186 | } else if (vex_f3() && vex_0f38()) { |
| 1187 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1188 | get_modrm(*current, &mod, ®op, &rm); |
| 1189 | switch (opcode) { |
| 1190 | case 0xf5: |
| 1191 | AppendToBuffer("pext%c %s,%s,", operand_size_code(), |
| 1192 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1193 | current += PrintRightOperand(current); |
| 1194 | break; |
| 1195 | case 0xf7: |
| 1196 | AppendToBuffer("sarx%c %s,", operand_size_code(), |
| 1197 | NameOfCPURegister(regop)); |
| 1198 | current += PrintRightOperand(current); |
| 1199 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1200 | break; |
| 1201 | default: |
| 1202 | UnimplementedInstruction(); |
| 1203 | } |
| 1204 | } else if (vex_f2() && vex_0f3a()) { |
| 1205 | int mod, regop, rm; |
| 1206 | get_modrm(*current, &mod, ®op, &rm); |
| 1207 | switch (opcode) { |
| 1208 | case 0xf0: |
| 1209 | AppendToBuffer("rorx%c %s,", operand_size_code(), |
| 1210 | NameOfCPURegister(regop)); |
| 1211 | current += PrintRightOperand(current); |
| 1212 | switch (operand_size()) { |
| 1213 | case OPERAND_DOUBLEWORD_SIZE: |
| 1214 | AppendToBuffer(",%d", *current & 0x1f); |
| 1215 | break; |
| 1216 | case OPERAND_QUADWORD_SIZE: |
| 1217 | AppendToBuffer(",%d", *current & 0x3f); |
| 1218 | break; |
| 1219 | default: |
| 1220 | UnimplementedInstruction(); |
| 1221 | } |
| 1222 | current += 1; |
| 1223 | break; |
| 1224 | default: |
| 1225 | UnimplementedInstruction(); |
| 1226 | } |
| 1227 | } else if (vex_none() && vex_0f()) { |
| 1228 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1229 | get_modrm(*current, &mod, ®op, &rm); |
| 1230 | switch (opcode) { |
| 1231 | case 0x28: |
| 1232 | AppendToBuffer("vmovaps %s,", NameOfXMMRegister(regop)); |
| 1233 | current += PrintRightXMMOperand(current); |
| 1234 | break; |
| 1235 | case 0x29: |
| 1236 | AppendToBuffer("vmovaps "); |
| 1237 | current += PrintRightXMMOperand(current); |
| 1238 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1239 | break; |
| 1240 | case 0x2e: |
| 1241 | AppendToBuffer("vucomiss %s,", NameOfXMMRegister(regop)); |
| 1242 | current += PrintRightXMMOperand(current); |
| 1243 | break; |
| 1244 | case 0x54: |
| 1245 | AppendToBuffer("vandps %s,%s,", NameOfXMMRegister(regop), |
| 1246 | NameOfXMMRegister(vvvv)); |
| 1247 | current += PrintRightXMMOperand(current); |
| 1248 | break; |
| 1249 | case 0x57: |
| 1250 | AppendToBuffer("vxorps %s,%s,", NameOfXMMRegister(regop), |
| 1251 | NameOfXMMRegister(vvvv)); |
| 1252 | current += PrintRightXMMOperand(current); |
| 1253 | break; |
| 1254 | default: |
| 1255 | UnimplementedInstruction(); |
| 1256 | } |
| 1257 | } else if (vex_66() && vex_0f()) { |
| 1258 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1259 | get_modrm(*current, &mod, ®op, &rm); |
| 1260 | switch (opcode) { |
| 1261 | case 0x28: |
| 1262 | AppendToBuffer("vmovapd %s,", NameOfXMMRegister(regop)); |
| 1263 | current += PrintRightXMMOperand(current); |
| 1264 | break; |
| 1265 | case 0x29: |
| 1266 | AppendToBuffer("vmovapd "); |
| 1267 | current += PrintRightXMMOperand(current); |
| 1268 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1269 | break; |
| 1270 | case 0x2e: |
| 1271 | AppendToBuffer("vucomisd %s,", NameOfXMMRegister(regop)); |
| 1272 | current += PrintRightXMMOperand(current); |
| 1273 | break; |
| 1274 | case 0x50: |
| 1275 | AppendToBuffer("vmovmskpd %s,", NameOfCPURegister(regop)); |
| 1276 | current += PrintRightXMMOperand(current); |
| 1277 | break; |
| 1278 | case 0x54: |
| 1279 | AppendToBuffer("vandpd %s,%s,", NameOfXMMRegister(regop), |
| 1280 | NameOfXMMRegister(vvvv)); |
| 1281 | current += PrintRightXMMOperand(current); |
| 1282 | break; |
| 1283 | case 0x56: |
| 1284 | AppendToBuffer("vorpd %s,%s,", NameOfXMMRegister(regop), |
| 1285 | NameOfXMMRegister(vvvv)); |
| 1286 | current += PrintRightXMMOperand(current); |
| 1287 | break; |
| 1288 | case 0x57: |
| 1289 | AppendToBuffer("vxorpd %s,%s,", NameOfXMMRegister(regop), |
| 1290 | NameOfXMMRegister(vvvv)); |
| 1291 | current += PrintRightXMMOperand(current); |
| 1292 | break; |
| 1293 | case 0x6e: |
| 1294 | AppendToBuffer("vmov%c %s,", vex_w() ? 'q' : 'd', |
| 1295 | NameOfXMMRegister(regop)); |
| 1296 | current += PrintRightOperand(current); |
| 1297 | break; |
| 1298 | case 0x73: |
| 1299 | AppendToBuffer("%s %s,", regop == 6 ? "vpsllq" : "vpsrlq", |
| 1300 | NameOfXMMRegister(vvvv)); |
| 1301 | current += PrintRightXMMOperand(current); |
| 1302 | AppendToBuffer(",%u", *current++); |
| 1303 | break; |
| 1304 | case 0x76: |
| 1305 | AppendToBuffer("vpcmpeqd %s,%s,", NameOfXMMRegister(regop), |
| 1306 | NameOfXMMRegister(vvvv)); |
| 1307 | current += PrintRightXMMOperand(current); |
| 1308 | break; |
| 1309 | case 0x7e: |
| 1310 | AppendToBuffer("vmov%c ", vex_w() ? 'q' : 'd'); |
| 1311 | current += PrintRightOperand(current); |
| 1312 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1313 | break; |
| 1314 | default: |
| 1315 | UnimplementedInstruction(); |
| 1316 | } |
| 1317 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1318 | } else { |
| 1319 | UnimplementedInstruction(); |
| 1320 | } |
| 1321 | |
| 1322 | return static_cast<int>(current - data); |
| 1323 | } |
| 1324 | |
| 1325 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1326 | // Returns number of bytes used, including *data. |
| 1327 | int DisassemblerX64::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1328 | byte escape_opcode = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1329 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1330 | byte modrm_byte = *(data+1); |
| 1331 | |
| 1332 | if (modrm_byte >= 0xC0) { |
| 1333 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 1334 | } else { |
| 1335 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1336 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
| 1339 | int DisassemblerX64::MemoryFPUInstruction(int escape_opcode, |
| 1340 | int modrm_byte, |
| 1341 | byte* modrm_start) { |
| 1342 | const char* mnem = "?"; |
| 1343 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 1344 | switch (escape_opcode) { |
| 1345 | case 0xD9: switch (regop) { |
| 1346 | case 0: mnem = "fld_s"; break; |
| 1347 | case 3: mnem = "fstp_s"; break; |
| 1348 | case 7: mnem = "fstcw"; break; |
| 1349 | default: UnimplementedInstruction(); |
| 1350 | } |
| 1351 | break; |
| 1352 | |
| 1353 | case 0xDB: switch (regop) { |
| 1354 | case 0: mnem = "fild_s"; break; |
| 1355 | case 1: mnem = "fisttp_s"; break; |
| 1356 | case 2: mnem = "fist_s"; break; |
| 1357 | case 3: mnem = "fistp_s"; break; |
| 1358 | default: UnimplementedInstruction(); |
| 1359 | } |
| 1360 | break; |
| 1361 | |
| 1362 | case 0xDD: switch (regop) { |
| 1363 | case 0: mnem = "fld_d"; break; |
| 1364 | case 3: mnem = "fstp_d"; break; |
| 1365 | default: UnimplementedInstruction(); |
| 1366 | } |
| 1367 | break; |
| 1368 | |
| 1369 | case 0xDF: switch (regop) { |
| 1370 | case 5: mnem = "fild_d"; break; |
| 1371 | case 7: mnem = "fistp_d"; break; |
| 1372 | default: UnimplementedInstruction(); |
| 1373 | } |
| 1374 | break; |
| 1375 | |
| 1376 | default: UnimplementedInstruction(); |
| 1377 | } |
| 1378 | AppendToBuffer("%s ", mnem); |
| 1379 | int count = PrintRightOperand(modrm_start); |
| 1380 | return count + 1; |
| 1381 | } |
| 1382 | |
| 1383 | int DisassemblerX64::RegisterFPUInstruction(int escape_opcode, |
| 1384 | byte modrm_byte) { |
| 1385 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 1386 | const char* mnem = "?"; |
| 1387 | |
| 1388 | switch (escape_opcode) { |
| 1389 | case 0xD8: |
| 1390 | UnimplementedInstruction(); |
| 1391 | break; |
| 1392 | |
| 1393 | case 0xD9: |
| 1394 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1395 | case 0xC0: |
| 1396 | mnem = "fld"; |
| 1397 | has_register = true; |
| 1398 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1399 | case 0xC8: |
| 1400 | mnem = "fxch"; |
| 1401 | has_register = true; |
| 1402 | break; |
| 1403 | default: |
| 1404 | switch (modrm_byte) { |
| 1405 | case 0xE0: mnem = "fchs"; break; |
| 1406 | case 0xE1: mnem = "fabs"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1407 | case 0xE3: mnem = "fninit"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1408 | case 0xE4: mnem = "ftst"; break; |
| 1409 | case 0xE8: mnem = "fld1"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1410 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1411 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1412 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1413 | case 0xF0: mnem = "f2xm1"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1414 | case 0xF1: mnem = "fyl2x"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1415 | case 0xF2: mnem = "fptan"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1416 | case 0xF5: mnem = "fprem1"; break; |
| 1417 | case 0xF7: mnem = "fincstp"; break; |
| 1418 | case 0xF8: mnem = "fprem"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1419 | case 0xFC: mnem = "frndint"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1420 | case 0xFD: mnem = "fscale"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1421 | case 0xFE: mnem = "fsin"; break; |
| 1422 | case 0xFF: mnem = "fcos"; break; |
| 1423 | default: UnimplementedInstruction(); |
| 1424 | } |
| 1425 | } |
| 1426 | break; |
| 1427 | |
| 1428 | case 0xDA: |
| 1429 | if (modrm_byte == 0xE9) { |
| 1430 | mnem = "fucompp"; |
| 1431 | } else { |
| 1432 | UnimplementedInstruction(); |
| 1433 | } |
| 1434 | break; |
| 1435 | |
| 1436 | case 0xDB: |
| 1437 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 1438 | mnem = "fucomi"; |
| 1439 | has_register = true; |
| 1440 | } else if (modrm_byte == 0xE2) { |
| 1441 | mnem = "fclex"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1442 | } else if (modrm_byte == 0xE3) { |
| 1443 | mnem = "fninit"; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1444 | } else { |
| 1445 | UnimplementedInstruction(); |
| 1446 | } |
| 1447 | break; |
| 1448 | |
| 1449 | case 0xDC: |
| 1450 | has_register = true; |
| 1451 | switch (modrm_byte & 0xF8) { |
| 1452 | case 0xC0: mnem = "fadd"; break; |
| 1453 | case 0xE8: mnem = "fsub"; break; |
| 1454 | case 0xC8: mnem = "fmul"; break; |
| 1455 | case 0xF8: mnem = "fdiv"; break; |
| 1456 | default: UnimplementedInstruction(); |
| 1457 | } |
| 1458 | break; |
| 1459 | |
| 1460 | case 0xDD: |
| 1461 | has_register = true; |
| 1462 | switch (modrm_byte & 0xF8) { |
| 1463 | case 0xC0: mnem = "ffree"; break; |
| 1464 | case 0xD8: mnem = "fstp"; break; |
| 1465 | default: UnimplementedInstruction(); |
| 1466 | } |
| 1467 | break; |
| 1468 | |
| 1469 | case 0xDE: |
| 1470 | if (modrm_byte == 0xD9) { |
| 1471 | mnem = "fcompp"; |
| 1472 | } else { |
| 1473 | has_register = true; |
| 1474 | switch (modrm_byte & 0xF8) { |
| 1475 | case 0xC0: mnem = "faddp"; break; |
| 1476 | case 0xE8: mnem = "fsubp"; break; |
| 1477 | case 0xC8: mnem = "fmulp"; break; |
| 1478 | case 0xF8: mnem = "fdivp"; break; |
| 1479 | default: UnimplementedInstruction(); |
| 1480 | } |
| 1481 | } |
| 1482 | break; |
| 1483 | |
| 1484 | case 0xDF: |
| 1485 | if (modrm_byte == 0xE0) { |
| 1486 | mnem = "fnstsw_ax"; |
| 1487 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 1488 | mnem = "fucomip"; |
| 1489 | has_register = true; |
| 1490 | } |
| 1491 | break; |
| 1492 | |
| 1493 | default: UnimplementedInstruction(); |
| 1494 | } |
| 1495 | |
| 1496 | if (has_register) { |
| 1497 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 1498 | } else { |
| 1499 | AppendToBuffer("%s", mnem); |
| 1500 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1501 | return 2; |
| 1502 | } |
| 1503 | |
| 1504 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1505 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1506 | // Handle all two-byte opcodes, which start with 0x0F. |
| 1507 | // These instructions may be affected by an 0x66, 0xF2, or 0xF3 prefix. |
| 1508 | // We do not use any three-byte opcodes, which start with 0x0F38 or 0x0F3A. |
| 1509 | int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) { |
| 1510 | byte opcode = *(data + 1); |
| 1511 | byte* current = data + 2; |
| 1512 | // At return, "current" points to the start of the next instruction. |
| 1513 | const char* mnemonic = TwoByteMnemonic(opcode); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1514 | if (operand_size_ == 0x66) { |
| 1515 | // 0x66 0x0F prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1516 | int mod, regop, rm; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1517 | if (opcode == 0x3A) { |
| 1518 | byte third_byte = *current; |
| 1519 | current = data + 3; |
| 1520 | if (third_byte == 0x17) { |
| 1521 | get_modrm(*current, &mod, ®op, &rm); |
| 1522 | AppendToBuffer("extractps "); // reg/m32, xmm, imm8 |
| 1523 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1524 | AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1525 | current += 1; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1526 | } else if (third_byte == 0x0a) { |
| 1527 | get_modrm(*current, &mod, ®op, &rm); |
| 1528 | AppendToBuffer("roundss %s,", NameOfXMMRegister(regop)); |
| 1529 | current += PrintRightXMMOperand(current); |
| 1530 | AppendToBuffer(",0x%x", (*current) & 3); |
| 1531 | current += 1; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1532 | } else if (third_byte == 0x0b) { |
| 1533 | get_modrm(*current, &mod, ®op, &rm); |
| 1534 | // roundsd xmm, xmm/m64, imm8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1535 | AppendToBuffer("roundsd %s,", NameOfXMMRegister(regop)); |
| 1536 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1537 | AppendToBuffer(",0x%x", (*current) & 3); |
| 1538 | current += 1; |
| 1539 | } else if (third_byte == 0x16) { |
| 1540 | get_modrm(*current, &mod, &rm, ®op); |
| 1541 | AppendToBuffer("pextrd "); // reg/m32, xmm, imm8 |
| 1542 | current += PrintRightOperand(current); |
| 1543 | AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3); |
| 1544 | current += 1; |
| 1545 | } else if (third_byte == 0x22) { |
| 1546 | get_modrm(*current, &mod, ®op, &rm); |
| 1547 | AppendToBuffer("pinsrd "); // xmm, reg/m32, imm8 |
| 1548 | AppendToBuffer(" %s,", NameOfXMMRegister(regop)); |
| 1549 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1550 | AppendToBuffer(",%d", (*current) & 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1551 | current += 1; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1552 | } else { |
| 1553 | UnimplementedInstruction(); |
| 1554 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1555 | } else { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1556 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1557 | if (opcode == 0x1f) { |
| 1558 | current++; |
| 1559 | if (rm == 4) { // SIB byte present. |
| 1560 | current++; |
| 1561 | } |
| 1562 | if (mod == 1) { // Byte displacement. |
| 1563 | current += 1; |
| 1564 | } else if (mod == 2) { // 32-bit displacement. |
| 1565 | current += 4; |
| 1566 | } // else no immediate displacement. |
| 1567 | AppendToBuffer("nop"); |
| 1568 | } else if (opcode == 0x28) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1569 | AppendToBuffer("movapd %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1570 | current += PrintRightXMMOperand(current); |
| 1571 | } else if (opcode == 0x29) { |
| 1572 | AppendToBuffer("movapd "); |
| 1573 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1574 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1575 | } else if (opcode == 0x6E) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1576 | AppendToBuffer("mov%c %s,", |
| 1577 | rex_w() ? 'q' : 'd', |
| 1578 | NameOfXMMRegister(regop)); |
| 1579 | current += PrintRightOperand(current); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1580 | } else if (opcode == 0x6F) { |
| 1581 | AppendToBuffer("movdqa %s,", |
| 1582 | NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1583 | current += PrintRightXMMOperand(current); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1584 | } else if (opcode == 0x7E) { |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1585 | AppendToBuffer("mov%c ", |
| 1586 | rex_w() ? 'q' : 'd'); |
| 1587 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1588 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1589 | } else if (opcode == 0x7F) { |
| 1590 | AppendToBuffer("movdqa "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1591 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1592 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1593 | } else if (opcode == 0xD6) { |
| 1594 | AppendToBuffer("movq "); |
| 1595 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1596 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1597 | } else if (opcode == 0x50) { |
| 1598 | AppendToBuffer("movmskpd %s,", NameOfCPURegister(regop)); |
| 1599 | current += PrintRightXMMOperand(current); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1600 | } else if (opcode == 0x72) { |
| 1601 | current += 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1602 | AppendToBuffer("%s %s,%d", (regop == 6) ? "pslld" : "psrld", |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1603 | NameOfXMMRegister(rm), *current & 0x7f); |
| 1604 | current += 1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1605 | } else if (opcode == 0x73) { |
| 1606 | current += 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1607 | AppendToBuffer("%s %s,%d", (regop == 6) ? "psllq" : "psrlq", |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1608 | NameOfXMMRegister(rm), *current & 0x7f); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1609 | current += 1; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1610 | } else { |
| 1611 | const char* mnemonic = "?"; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1612 | if (opcode == 0x54) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1613 | mnemonic = "andpd"; |
| 1614 | } else if (opcode == 0x56) { |
| 1615 | mnemonic = "orpd"; |
| 1616 | } else if (opcode == 0x57) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1617 | mnemonic = "xorpd"; |
| 1618 | } else if (opcode == 0x2E) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1619 | mnemonic = "ucomisd"; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1620 | } else if (opcode == 0x2F) { |
| 1621 | mnemonic = "comisd"; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1622 | } else if (opcode == 0x76) { |
| 1623 | mnemonic = "pcmpeqd"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1624 | } else if (opcode == 0x62) { |
| 1625 | mnemonic = "punpckldq"; |
| 1626 | } else if (opcode == 0x6A) { |
| 1627 | mnemonic = "punpckhdq"; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1628 | } else { |
| 1629 | UnimplementedInstruction(); |
| 1630 | } |
| 1631 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1632 | current += PrintRightXMMOperand(current); |
| 1633 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1634 | } |
| 1635 | } else if (group_1_prefix_ == 0xF2) { |
| 1636 | // Beginning of instructions with prefix 0xF2. |
| 1637 | |
| 1638 | if (opcode == 0x11 || opcode == 0x10) { |
| 1639 | // MOVSD: Move scalar double-precision fp to/from/between XMM registers. |
| 1640 | AppendToBuffer("movsd "); |
| 1641 | int mod, regop, rm; |
| 1642 | get_modrm(*current, &mod, ®op, &rm); |
| 1643 | if (opcode == 0x11) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1644 | current += PrintRightXMMOperand(current); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1645 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1646 | } else { |
| 1647 | AppendToBuffer("%s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1648 | current += PrintRightXMMOperand(current); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1649 | } |
| 1650 | } else if (opcode == 0x2A) { |
| 1651 | // CVTSI2SD: integer to XMM double conversion. |
| 1652 | int mod, regop, rm; |
| 1653 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1654 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1655 | current += PrintRightOperand(current); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1656 | } else if (opcode == 0x2C) { |
| 1657 | // CVTTSD2SI: |
| 1658 | // Convert with truncation scalar double-precision FP to integer. |
| 1659 | int mod, regop, rm; |
| 1660 | get_modrm(*current, &mod, ®op, &rm); |
| 1661 | AppendToBuffer("cvttsd2si%c %s,", |
| 1662 | operand_size_code(), NameOfCPURegister(regop)); |
| 1663 | current += PrintRightXMMOperand(current); |
| 1664 | } else if (opcode == 0x2D) { |
| 1665 | // CVTSD2SI: Convert scalar double-precision FP to integer. |
| 1666 | int mod, regop, rm; |
| 1667 | get_modrm(*current, &mod, ®op, &rm); |
| 1668 | AppendToBuffer("cvtsd2si%c %s,", |
| 1669 | operand_size_code(), NameOfCPURegister(regop)); |
| 1670 | current += PrintRightXMMOperand(current); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1671 | } else if ((opcode & 0xF8) == 0x58 || opcode == 0x51) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1672 | // XMM arithmetic. Mnemonic was retrieved at the start of this function. |
| 1673 | int mod, regop, rm; |
| 1674 | get_modrm(*current, &mod, ®op, &rm); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1675 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1676 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1677 | } else if (opcode == 0xC2) { |
| 1678 | // Intel manual 2A, Table 3-18. |
| 1679 | int mod, regop, rm; |
| 1680 | get_modrm(*current, &mod, ®op, &rm); |
| 1681 | const char* const pseudo_op[] = { |
| 1682 | "cmpeqsd", |
| 1683 | "cmpltsd", |
| 1684 | "cmplesd", |
| 1685 | "cmpunordsd", |
| 1686 | "cmpneqsd", |
| 1687 | "cmpnltsd", |
| 1688 | "cmpnlesd", |
| 1689 | "cmpordsd" |
| 1690 | }; |
| 1691 | AppendToBuffer("%s %s,%s", |
| 1692 | pseudo_op[current[1]], |
| 1693 | NameOfXMMRegister(regop), |
| 1694 | NameOfXMMRegister(rm)); |
| 1695 | current += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1696 | } else { |
| 1697 | UnimplementedInstruction(); |
| 1698 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1699 | } else if (group_1_prefix_ == 0xF3) { |
| 1700 | // Instructions with prefix 0xF3. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1701 | if (opcode == 0x11 || opcode == 0x10) { |
| 1702 | // MOVSS: Move scalar double-precision fp to/from/between XMM registers. |
| 1703 | AppendToBuffer("movss "); |
| 1704 | int mod, regop, rm; |
| 1705 | get_modrm(*current, &mod, ®op, &rm); |
| 1706 | if (opcode == 0x11) { |
| 1707 | current += PrintRightOperand(current); |
| 1708 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1709 | } else { |
| 1710 | AppendToBuffer("%s,", NameOfXMMRegister(regop)); |
| 1711 | current += PrintRightOperand(current); |
| 1712 | } |
| 1713 | } else if (opcode == 0x2A) { |
| 1714 | // CVTSI2SS: integer to XMM single conversion. |
| 1715 | int mod, regop, rm; |
| 1716 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1717 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1718 | current += PrintRightOperand(current); |
| 1719 | } else if (opcode == 0x2C) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1720 | // CVTTSS2SI: |
| 1721 | // Convert with truncation scalar single-precision FP to dword integer. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1722 | int mod, regop, rm; |
| 1723 | get_modrm(*current, &mod, ®op, &rm); |
| 1724 | AppendToBuffer("cvttss2si%c %s,", |
| 1725 | operand_size_code(), NameOfCPURegister(regop)); |
| 1726 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1727 | } else if (opcode == 0x7E) { |
| 1728 | int mod, regop, rm; |
| 1729 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1730 | AppendToBuffer("movq %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1731 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1732 | } else if ((opcode & 0xF8) == 0x58 || opcode == 0x51) { |
| 1733 | // XMM arithmetic. Mnemonic was retrieved at the start of this function. |
| 1734 | int mod, regop, rm; |
| 1735 | get_modrm(*current, &mod, ®op, &rm); |
| 1736 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1737 | current += PrintRightXMMOperand(current); |
| 1738 | } else if (opcode == 0xB8) { |
| 1739 | int mod, regop, rm; |
| 1740 | get_modrm(*current, &mod, ®op, &rm); |
| 1741 | AppendToBuffer("popcnt%c %s,", operand_size_code(), |
| 1742 | NameOfCPURegister(regop)); |
| 1743 | current += PrintRightOperand(current); |
| 1744 | } else if (opcode == 0xBC) { |
| 1745 | int mod, regop, rm; |
| 1746 | get_modrm(*current, &mod, ®op, &rm); |
| 1747 | AppendToBuffer("tzcnt%c %s,", operand_size_code(), |
| 1748 | NameOfCPURegister(regop)); |
| 1749 | current += PrintRightOperand(current); |
| 1750 | } else if (opcode == 0xBD) { |
| 1751 | int mod, regop, rm; |
| 1752 | get_modrm(*current, &mod, ®op, &rm); |
| 1753 | AppendToBuffer("lzcnt%c %s,", operand_size_code(), |
| 1754 | NameOfCPURegister(regop)); |
| 1755 | current += PrintRightOperand(current); |
| 1756 | } else if (opcode == 0xC2) { |
| 1757 | // Intel manual 2A, Table 3-18. |
| 1758 | int mod, regop, rm; |
| 1759 | get_modrm(*current, &mod, ®op, &rm); |
| 1760 | const char* const pseudo_op[] = {"cmpeqss", "cmpltss", "cmpless", |
| 1761 | "cmpunordss", "cmpneqss", "cmpnltss", |
| 1762 | "cmpnless", "cmpordss"}; |
| 1763 | AppendToBuffer("%s %s,%s", pseudo_op[current[1]], |
| 1764 | NameOfXMMRegister(regop), NameOfXMMRegister(rm)); |
| 1765 | current += 2; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1766 | } else { |
| 1767 | UnimplementedInstruction(); |
| 1768 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1769 | } else if (opcode == 0x1F) { |
| 1770 | // NOP |
| 1771 | int mod, regop, rm; |
| 1772 | get_modrm(*current, &mod, ®op, &rm); |
| 1773 | current++; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1774 | if (rm == 4) { // SIB byte present. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1775 | current++; |
| 1776 | } |
| 1777 | if (mod == 1) { // Byte displacement. |
| 1778 | current += 1; |
| 1779 | } else if (mod == 2) { // 32-bit displacement. |
| 1780 | current += 4; |
| 1781 | } // else no immediate displacement. |
| 1782 | AppendToBuffer("nop"); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1783 | |
| 1784 | } else if (opcode == 0x28) { |
| 1785 | // movaps xmm, xmm/m128 |
| 1786 | int mod, regop, rm; |
| 1787 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1788 | AppendToBuffer("movaps %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1789 | current += PrintRightXMMOperand(current); |
| 1790 | |
| 1791 | } else if (opcode == 0x29) { |
| 1792 | // movaps xmm/m128, xmm |
| 1793 | int mod, regop, rm; |
| 1794 | get_modrm(*current, &mod, ®op, &rm); |
| 1795 | AppendToBuffer("movaps "); |
| 1796 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1797 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1798 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1799 | } else if (opcode == 0x2e) { |
| 1800 | int mod, regop, rm; |
| 1801 | get_modrm(*current, &mod, ®op, &rm); |
| 1802 | AppendToBuffer("ucomiss %s,", NameOfXMMRegister(regop)); |
| 1803 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1804 | } else if (opcode == 0xA2) { |
| 1805 | // CPUID |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1806 | AppendToBuffer("%s", mnemonic); |
| 1807 | |
| 1808 | } else if ((opcode & 0xF0) == 0x40) { |
| 1809 | // CMOVcc: conditional move. |
| 1810 | int condition = opcode & 0x0F; |
| 1811 | const InstructionDesc& idesc = cmov_instructions[condition]; |
| 1812 | byte_size_operand_ = idesc.byte_size_operation; |
| 1813 | current += PrintOperands(idesc.mnem, idesc.op_order_, current); |
| 1814 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1815 | } else if (opcode >= 0x53 && opcode <= 0x5F) { |
| 1816 | const char* const pseudo_op[] = { |
| 1817 | "rcpps", |
| 1818 | "andps", |
| 1819 | "andnps", |
| 1820 | "orps", |
| 1821 | "xorps", |
| 1822 | "addps", |
| 1823 | "mulps", |
| 1824 | "cvtps2pd", |
| 1825 | "cvtdq2ps", |
| 1826 | "subps", |
| 1827 | "minps", |
| 1828 | "divps", |
| 1829 | "maxps", |
| 1830 | }; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1831 | int mod, regop, rm; |
| 1832 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1833 | AppendToBuffer("%s %s,", |
| 1834 | pseudo_op[opcode - 0x53], |
| 1835 | NameOfXMMRegister(regop)); |
| 1836 | current += PrintRightXMMOperand(current); |
| 1837 | |
| 1838 | } else if (opcode == 0xC6) { |
| 1839 | // shufps xmm, xmm/m128, imm8 |
| 1840 | int mod, regop, rm; |
| 1841 | get_modrm(*current, &mod, ®op, &rm); |
| 1842 | AppendToBuffer("shufps %s, ", NameOfXMMRegister(regop)); |
| 1843 | current += PrintRightXMMOperand(current); |
| 1844 | AppendToBuffer(", %d", (*current) & 3); |
| 1845 | current += 1; |
| 1846 | |
| 1847 | } else if (opcode == 0x50) { |
| 1848 | // movmskps reg, xmm |
| 1849 | int mod, regop, rm; |
| 1850 | get_modrm(*current, &mod, ®op, &rm); |
| 1851 | AppendToBuffer("movmskps %s,", NameOfCPURegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1852 | current += PrintRightXMMOperand(current); |
| 1853 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1854 | } else if ((opcode & 0xF0) == 0x80) { |
| 1855 | // Jcc: Conditional jump (branch). |
| 1856 | current = data + JumpConditional(data); |
| 1857 | |
| 1858 | } else if (opcode == 0xBE || opcode == 0xBF || opcode == 0xB6 || |
| 1859 | opcode == 0xB7 || opcode == 0xAF) { |
| 1860 | // Size-extending moves, IMUL. |
| 1861 | current += PrintOperands(mnemonic, REG_OPER_OP_ORDER, current); |
| 1862 | |
| 1863 | } else if ((opcode & 0xF0) == 0x90) { |
| 1864 | // SETcc: Set byte on condition. Needs pointer to beginning of instruction. |
| 1865 | current = data + SetCC(data); |
| 1866 | |
| 1867 | } else if (opcode == 0xAB || opcode == 0xA5 || opcode == 0xAD) { |
| 1868 | // SHLD, SHRD (double-precision shift), BTS (bit set). |
| 1869 | AppendToBuffer("%s ", mnemonic); |
| 1870 | int mod, regop, rm; |
| 1871 | get_modrm(*current, &mod, ®op, &rm); |
| 1872 | current += PrintRightOperand(current); |
| 1873 | if (opcode == 0xAB) { |
| 1874 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1875 | } else { |
| 1876 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
| 1877 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1878 | } else if (opcode == 0xB8 || opcode == 0xBC || opcode == 0xBD) { |
| 1879 | // POPCNT, CTZ, CLZ. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1880 | AppendToBuffer("%s%c ", mnemonic, operand_size_code()); |
| 1881 | int mod, regop, rm; |
| 1882 | get_modrm(*current, &mod, ®op, &rm); |
| 1883 | AppendToBuffer("%s,", NameOfCPURegister(regop)); |
| 1884 | current += PrintRightOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1885 | } else if (opcode == 0x0B) { |
| 1886 | AppendToBuffer("ud2"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1887 | } else { |
| 1888 | UnimplementedInstruction(); |
| 1889 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1890 | return static_cast<int>(current - data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1891 | } |
| 1892 | |
| 1893 | |
| 1894 | // Mnemonics for two-byte opcode instructions starting with 0x0F. |
| 1895 | // The argument is the second byte of the two-byte opcode. |
| 1896 | // Returns NULL if the instruction is not handled here. |
| 1897 | const char* DisassemblerX64::TwoByteMnemonic(byte opcode) { |
| 1898 | switch (opcode) { |
| 1899 | case 0x1F: |
| 1900 | return "nop"; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1901 | case 0x2A: // F2/F3 prefix. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1902 | return (group_1_prefix_ == 0xF2) ? "cvtsi2sd" : "cvtsi2ss"; |
| 1903 | case 0x51: // F2/F3 prefix. |
| 1904 | return (group_1_prefix_ == 0xF2) ? "sqrtsd" : "sqrtss"; |
| 1905 | case 0x58: // F2/F3 prefix. |
| 1906 | return (group_1_prefix_ == 0xF2) ? "addsd" : "addss"; |
| 1907 | case 0x59: // F2/F3 prefix. |
| 1908 | return (group_1_prefix_ == 0xF2) ? "mulsd" : "mulss"; |
| 1909 | case 0x5A: // F2/F3 prefix. |
| 1910 | return (group_1_prefix_ == 0xF2) ? "cvtsd2ss" : "cvtss2sd"; |
| 1911 | case 0x5D: // F2/F3 prefix. |
| 1912 | return (group_1_prefix_ == 0xF2) ? "minsd" : "minss"; |
| 1913 | case 0x5C: // F2/F3 prefix. |
| 1914 | return (group_1_prefix_ == 0xF2) ? "subsd" : "subss"; |
| 1915 | case 0x5E: // F2/F3 prefix. |
| 1916 | return (group_1_prefix_ == 0xF2) ? "divsd" : "divss"; |
| 1917 | case 0x5F: // F2/F3 prefix. |
| 1918 | return (group_1_prefix_ == 0xF2) ? "maxsd" : "maxss"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1919 | case 0xA2: |
| 1920 | return "cpuid"; |
| 1921 | case 0xA5: |
| 1922 | return "shld"; |
| 1923 | case 0xAB: |
| 1924 | return "bts"; |
| 1925 | case 0xAD: |
| 1926 | return "shrd"; |
| 1927 | case 0xAF: |
| 1928 | return "imul"; |
| 1929 | case 0xB6: |
| 1930 | return "movzxb"; |
| 1931 | case 0xB7: |
| 1932 | return "movzxw"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1933 | case 0xBC: |
| 1934 | return "bsf"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1935 | case 0xBD: |
| 1936 | return "bsr"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1937 | case 0xBE: |
| 1938 | return "movsxb"; |
| 1939 | case 0xBF: |
| 1940 | return "movsxw"; |
| 1941 | default: |
| 1942 | return NULL; |
| 1943 | } |
| 1944 | } |
| 1945 | |
| 1946 | |
| 1947 | // Disassembles the instruction at instr, and writes it into out_buffer. |
| 1948 | int DisassemblerX64::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 1949 | byte* instr) { |
| 1950 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 1951 | byte* data = instr; |
| 1952 | bool processed = true; // Will be set to false if the current instruction |
| 1953 | // is not in 'instructions' table. |
| 1954 | byte current; |
| 1955 | |
| 1956 | // Scan for prefixes. |
| 1957 | while (true) { |
| 1958 | current = *data; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1959 | if (current == OPERAND_SIZE_OVERRIDE_PREFIX) { // Group 3 prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1960 | operand_size_ = current; |
| 1961 | } else if ((current & 0xF0) == 0x40) { // REX prefix. |
| 1962 | setRex(current); |
| 1963 | if (rex_w()) AppendToBuffer("REX.W "); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1964 | } else if ((current & 0xFE) == 0xF2) { // Group 1 prefix (0xF2 or 0xF3). |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1965 | group_1_prefix_ = current; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1966 | } else if (current == VEX3_PREFIX) { |
| 1967 | vex_byte0_ = current; |
| 1968 | vex_byte1_ = *(data + 1); |
| 1969 | vex_byte2_ = *(data + 2); |
| 1970 | setRex(0x40 | (~(vex_byte1_ >> 5) & 7) | ((vex_byte2_ >> 4) & 8)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1971 | data += 3; |
| 1972 | break; // Vex is the last prefix. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1973 | } else if (current == VEX2_PREFIX) { |
| 1974 | vex_byte0_ = current; |
| 1975 | vex_byte1_ = *(data + 1); |
| 1976 | setRex(0x40 | (~(vex_byte1_ >> 5) & 4)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1977 | data += 2; |
| 1978 | break; // Vex is the last prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1979 | } else { // Not a prefix - an opcode. |
| 1980 | break; |
| 1981 | } |
| 1982 | data++; |
| 1983 | } |
| 1984 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1985 | // Decode AVX instructions. |
| 1986 | if (vex_byte0_ != 0) { |
| 1987 | processed = true; |
| 1988 | data += AVXInstruction(data); |
| 1989 | } else { |
| 1990 | const InstructionDesc& idesc = instruction_table_->Get(current); |
| 1991 | byte_size_operand_ = idesc.byte_size_operation; |
| 1992 | switch (idesc.type) { |
| 1993 | case ZERO_OPERANDS_INSTR: |
| 1994 | if (current >= 0xA4 && current <= 0xA7) { |
| 1995 | // String move or compare operations. |
| 1996 | if (group_1_prefix_ == REP_PREFIX) { |
| 1997 | // REP. |
| 1998 | AppendToBuffer("rep "); |
| 1999 | } |
| 2000 | if (rex_w()) AppendToBuffer("REX.W "); |
| 2001 | AppendToBuffer("%s%c", idesc.mnem, operand_size_code()); |
| 2002 | } else { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 2003 | AppendToBuffer("%s%c", idesc.mnem, operand_size_code()); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2004 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2005 | data++; |
| 2006 | break; |
| 2007 | |
| 2008 | case TWO_OPERANDS_INSTR: |
| 2009 | data++; |
| 2010 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 2011 | break; |
| 2012 | |
| 2013 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 2014 | data += JumpConditionalShort(data); |
| 2015 | break; |
| 2016 | |
| 2017 | case REGISTER_INSTR: |
| 2018 | AppendToBuffer("%s%c %s", idesc.mnem, operand_size_code(), |
| 2019 | NameOfCPURegister(base_reg(current & 0x07))); |
| 2020 | data++; |
| 2021 | break; |
| 2022 | case PUSHPOP_INSTR: |
| 2023 | AppendToBuffer("%s %s", idesc.mnem, |
| 2024 | NameOfCPURegister(base_reg(current & 0x07))); |
| 2025 | data++; |
| 2026 | break; |
| 2027 | case MOVE_REG_INSTR: { |
| 2028 | byte* addr = NULL; |
| 2029 | switch (operand_size()) { |
| 2030 | case OPERAND_WORD_SIZE: |
| 2031 | addr = |
| 2032 | reinterpret_cast<byte*>(*reinterpret_cast<int16_t*>(data + 1)); |
| 2033 | data += 3; |
| 2034 | break; |
| 2035 | case OPERAND_DOUBLEWORD_SIZE: |
| 2036 | addr = |
| 2037 | reinterpret_cast<byte*>(*reinterpret_cast<uint32_t*>(data + 1)); |
| 2038 | data += 5; |
| 2039 | break; |
| 2040 | case OPERAND_QUADWORD_SIZE: |
| 2041 | addr = |
| 2042 | reinterpret_cast<byte*>(*reinterpret_cast<int64_t*>(data + 1)); |
| 2043 | data += 9; |
| 2044 | break; |
| 2045 | default: |
| 2046 | UNREACHABLE(); |
| 2047 | } |
| 2048 | AppendToBuffer("mov%c %s,%s", operand_size_code(), |
| 2049 | NameOfCPURegister(base_reg(current & 0x07)), |
| 2050 | NameOfAddress(addr)); |
| 2051 | break; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2052 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2053 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2054 | case CALL_JUMP_INSTR: { |
| 2055 | byte* addr = data + *reinterpret_cast<int32_t*>(data + 1) + 5; |
| 2056 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 2057 | data += 5; |
| 2058 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2059 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2060 | |
| 2061 | case SHORT_IMMEDIATE_INSTR: { |
| 2062 | byte* addr = |
| 2063 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 2064 | AppendToBuffer("%s rax,%s", idesc.mnem, NameOfAddress(addr)); |
| 2065 | data += 5; |
| 2066 | break; |
| 2067 | } |
| 2068 | |
| 2069 | case NO_INSTR: |
| 2070 | processed = false; |
| 2071 | break; |
| 2072 | |
| 2073 | default: |
| 2074 | UNIMPLEMENTED(); // This type is not implemented. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2075 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2076 | } |
| 2077 | |
| 2078 | // The first byte didn't match any of the simple opcodes, so we |
| 2079 | // need to do special processing on it. |
| 2080 | if (!processed) { |
| 2081 | switch (*data) { |
| 2082 | case 0xC2: |
| 2083 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data + 1)); |
| 2084 | data += 3; |
| 2085 | break; |
| 2086 | |
| 2087 | case 0x69: // fall through |
| 2088 | case 0x6B: { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2089 | int count = 1; |
| 2090 | count += PrintOperands("imul", REG_OPER_OP_ORDER, data + count); |
| 2091 | AppendToBuffer(",0x"); |
| 2092 | if (*data == 0x69) { |
| 2093 | count += PrintImmediate(data + count, operand_size()); |
| 2094 | } else { |
| 2095 | count += PrintImmediate(data + count, OPERAND_BYTE_SIZE); |
| 2096 | } |
| 2097 | data += count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2098 | break; |
| 2099 | } |
| 2100 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2101 | case 0x81: // fall through |
| 2102 | case 0x83: // 0x81 with sign extension bit set |
| 2103 | data += PrintImmediateOp(data); |
| 2104 | break; |
| 2105 | |
| 2106 | case 0x0F: |
| 2107 | data += TwoByteOpcodeInstruction(data); |
| 2108 | break; |
| 2109 | |
| 2110 | case 0x8F: { |
| 2111 | data++; |
| 2112 | int mod, regop, rm; |
| 2113 | get_modrm(*data, &mod, ®op, &rm); |
| 2114 | if (regop == 0) { |
| 2115 | AppendToBuffer("pop "); |
| 2116 | data += PrintRightOperand(data); |
| 2117 | } |
| 2118 | } |
| 2119 | break; |
| 2120 | |
| 2121 | case 0xFF: { |
| 2122 | data++; |
| 2123 | int mod, regop, rm; |
| 2124 | get_modrm(*data, &mod, ®op, &rm); |
| 2125 | const char* mnem = NULL; |
| 2126 | switch (regop) { |
| 2127 | case 0: |
| 2128 | mnem = "inc"; |
| 2129 | break; |
| 2130 | case 1: |
| 2131 | mnem = "dec"; |
| 2132 | break; |
| 2133 | case 2: |
| 2134 | mnem = "call"; |
| 2135 | break; |
| 2136 | case 4: |
| 2137 | mnem = "jmp"; |
| 2138 | break; |
| 2139 | case 6: |
| 2140 | mnem = "push"; |
| 2141 | break; |
| 2142 | default: |
| 2143 | mnem = "???"; |
| 2144 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 2145 | if (regop <= 1) { |
| 2146 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 2147 | } else { |
| 2148 | AppendToBuffer("%s ", mnem); |
| 2149 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2150 | data += PrintRightOperand(data); |
| 2151 | } |
| 2152 | break; |
| 2153 | |
| 2154 | case 0xC7: // imm32, fall through |
| 2155 | case 0xC6: // imm8 |
| 2156 | { |
| 2157 | bool is_byte = *data == 0xC6; |
| 2158 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2159 | if (is_byte) { |
| 2160 | AppendToBuffer("movb "); |
| 2161 | data += PrintRightByteOperand(data); |
| 2162 | int32_t imm = *data; |
| 2163 | AppendToBuffer(",0x%x", imm); |
| 2164 | data++; |
| 2165 | } else { |
| 2166 | AppendToBuffer("mov%c ", operand_size_code()); |
| 2167 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2168 | if (operand_size() == OPERAND_WORD_SIZE) { |
| 2169 | int16_t imm = *reinterpret_cast<int16_t*>(data); |
| 2170 | AppendToBuffer(",0x%x", imm); |
| 2171 | data += 2; |
| 2172 | } else { |
| 2173 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 2174 | AppendToBuffer(",0x%x", imm); |
| 2175 | data += 4; |
| 2176 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2177 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2178 | } |
| 2179 | break; |
| 2180 | |
| 2181 | case 0x80: { |
| 2182 | data++; |
| 2183 | AppendToBuffer("cmpb "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2184 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2185 | int32_t imm = *data; |
| 2186 | AppendToBuffer(",0x%x", imm); |
| 2187 | data++; |
| 2188 | } |
| 2189 | break; |
| 2190 | |
| 2191 | case 0x88: // 8bit, fall through |
| 2192 | case 0x89: // 32bit |
| 2193 | { |
| 2194 | bool is_byte = *data == 0x88; |
| 2195 | int mod, regop, rm; |
| 2196 | data++; |
| 2197 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2198 | if (is_byte) { |
| 2199 | AppendToBuffer("movb "); |
| 2200 | data += PrintRightByteOperand(data); |
| 2201 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 2202 | } else { |
| 2203 | AppendToBuffer("mov%c ", operand_size_code()); |
| 2204 | data += PrintRightOperand(data); |
| 2205 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 2206 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2207 | } |
| 2208 | break; |
| 2209 | |
| 2210 | case 0x90: |
| 2211 | case 0x91: |
| 2212 | case 0x92: |
| 2213 | case 0x93: |
| 2214 | case 0x94: |
| 2215 | case 0x95: |
| 2216 | case 0x96: |
| 2217 | case 0x97: { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2218 | int reg = (*data & 0x7) | (rex_b() ? 8 : 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2219 | if (reg == 0) { |
| 2220 | AppendToBuffer("nop"); // Common name for xchg rax,rax. |
| 2221 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2222 | AppendToBuffer("xchg%c rax,%s", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2223 | operand_size_code(), |
| 2224 | NameOfCPURegister(reg)); |
| 2225 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2226 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2227 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2228 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2229 | case 0xB0: |
| 2230 | case 0xB1: |
| 2231 | case 0xB2: |
| 2232 | case 0xB3: |
| 2233 | case 0xB4: |
| 2234 | case 0xB5: |
| 2235 | case 0xB6: |
| 2236 | case 0xB7: |
| 2237 | case 0xB8: |
| 2238 | case 0xB9: |
| 2239 | case 0xBA: |
| 2240 | case 0xBB: |
| 2241 | case 0xBC: |
| 2242 | case 0xBD: |
| 2243 | case 0xBE: |
| 2244 | case 0xBF: { |
| 2245 | // mov reg8,imm8 or mov reg32,imm32 |
| 2246 | byte opcode = *data; |
| 2247 | data++; |
| 2248 | bool is_32bit = (opcode >= 0xB8); |
| 2249 | int reg = (opcode & 0x7) | (rex_b() ? 8 : 0); |
| 2250 | if (is_32bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2251 | AppendToBuffer("mov%c %s,", |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2252 | operand_size_code(), |
| 2253 | NameOfCPURegister(reg)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2254 | data += PrintImmediate(data, OPERAND_DOUBLEWORD_SIZE); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2255 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2256 | AppendToBuffer("movb %s,", |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2257 | NameOfByteCPURegister(reg)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2258 | data += PrintImmediate(data, OPERAND_BYTE_SIZE); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2259 | } |
| 2260 | break; |
| 2261 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2262 | case 0xFE: { |
| 2263 | data++; |
| 2264 | int mod, regop, rm; |
| 2265 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2266 | if (regop == 1) { |
| 2267 | AppendToBuffer("decb "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2268 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2269 | } else { |
| 2270 | UnimplementedInstruction(); |
| 2271 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2272 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2273 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2274 | case 0x68: |
| 2275 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data + 1)); |
| 2276 | data += 5; |
| 2277 | break; |
| 2278 | |
| 2279 | case 0x6A: |
| 2280 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 2281 | data += 2; |
| 2282 | break; |
| 2283 | |
| 2284 | case 0xA1: // Fall through. |
| 2285 | case 0xA3: |
| 2286 | switch (operand_size()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2287 | case OPERAND_DOUBLEWORD_SIZE: { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2288 | const char* memory_location = NameOfAddress( |
| 2289 | reinterpret_cast<byte*>( |
| 2290 | *reinterpret_cast<int32_t*>(data + 1))); |
| 2291 | if (*data == 0xA1) { // Opcode 0xA1 |
| 2292 | AppendToBuffer("movzxlq rax,(%s)", memory_location); |
| 2293 | } else { // Opcode 0xA3 |
| 2294 | AppendToBuffer("movzxlq (%s),rax", memory_location); |
| 2295 | } |
| 2296 | data += 5; |
| 2297 | break; |
| 2298 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2299 | case OPERAND_QUADWORD_SIZE: { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2300 | // New x64 instruction mov rax,(imm_64). |
| 2301 | const char* memory_location = NameOfAddress( |
| 2302 | *reinterpret_cast<byte**>(data + 1)); |
| 2303 | if (*data == 0xA1) { // Opcode 0xA1 |
| 2304 | AppendToBuffer("movq rax,(%s)", memory_location); |
| 2305 | } else { // Opcode 0xA3 |
| 2306 | AppendToBuffer("movq (%s),rax", memory_location); |
| 2307 | } |
| 2308 | data += 9; |
| 2309 | break; |
| 2310 | } |
| 2311 | default: |
| 2312 | UnimplementedInstruction(); |
| 2313 | data += 2; |
| 2314 | } |
| 2315 | break; |
| 2316 | |
| 2317 | case 0xA8: |
| 2318 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data + 1)); |
| 2319 | data += 2; |
| 2320 | break; |
| 2321 | |
| 2322 | case 0xA9: { |
| 2323 | int64_t value = 0; |
| 2324 | switch (operand_size()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2325 | case OPERAND_WORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2326 | value = *reinterpret_cast<uint16_t*>(data + 1); |
| 2327 | data += 3; |
| 2328 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2329 | case OPERAND_DOUBLEWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2330 | value = *reinterpret_cast<uint32_t*>(data + 1); |
| 2331 | data += 5; |
| 2332 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2333 | case OPERAND_QUADWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2334 | value = *reinterpret_cast<int32_t*>(data + 1); |
| 2335 | data += 5; |
| 2336 | break; |
| 2337 | default: |
| 2338 | UNREACHABLE(); |
| 2339 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 2340 | AppendToBuffer("test%c rax,0x%" PRIx64, operand_size_code(), value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2341 | break; |
| 2342 | } |
| 2343 | case 0xD1: // fall through |
| 2344 | case 0xD3: // fall through |
| 2345 | case 0xC1: |
| 2346 | data += ShiftInstruction(data); |
| 2347 | break; |
| 2348 | case 0xD0: // fall through |
| 2349 | case 0xD2: // fall through |
| 2350 | case 0xC0: |
| 2351 | byte_size_operand_ = true; |
| 2352 | data += ShiftInstruction(data); |
| 2353 | break; |
| 2354 | |
| 2355 | case 0xD9: // fall through |
| 2356 | case 0xDA: // fall through |
| 2357 | case 0xDB: // fall through |
| 2358 | case 0xDC: // fall through |
| 2359 | case 0xDD: // fall through |
| 2360 | case 0xDE: // fall through |
| 2361 | case 0xDF: |
| 2362 | data += FPUInstruction(data); |
| 2363 | break; |
| 2364 | |
| 2365 | case 0xEB: |
| 2366 | data += JumpShort(data); |
| 2367 | break; |
| 2368 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2369 | case 0xF6: |
| 2370 | byte_size_operand_ = true; // fall through |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2371 | case 0xF7: |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2372 | data += F6F7Instruction(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2373 | break; |
| 2374 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2375 | case 0x3C: |
| 2376 | AppendToBuffer("cmp al,0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 2377 | data +=2; |
| 2378 | break; |
| 2379 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2380 | default: |
| 2381 | UnimplementedInstruction(); |
| 2382 | data += 1; |
| 2383 | } |
| 2384 | } // !processed |
| 2385 | |
| 2386 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 2387 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 2388 | } |
| 2389 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2390 | int instr_len = static_cast<int>(data - instr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2391 | DCHECK(instr_len > 0); // Ensure progress. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2392 | |
| 2393 | int outp = 0; |
| 2394 | // Instruction bytes. |
| 2395 | for (byte* bp = instr; bp < data; bp++) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2396 | outp += v8::internal::SNPrintF(out_buffer + outp, "%02x", *bp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2397 | } |
| 2398 | for (int i = 6 - instr_len; i >= 0; i--) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2399 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2400 | } |
| 2401 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2402 | outp += v8::internal::SNPrintF(out_buffer + outp, " %s", |
| 2403 | tmp_buffer_.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2404 | return instr_len; |
| 2405 | } |
| 2406 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2407 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2408 | //------------------------------------------------------------------------------ |
| 2409 | |
| 2410 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2411 | static const char* const cpu_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2412 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 2413 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 2414 | }; |
| 2415 | |
| 2416 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2417 | static const char* const byte_cpu_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2418 | "al", "cl", "dl", "bl", "spl", "bpl", "sil", "dil", |
| 2419 | "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l" |
| 2420 | }; |
| 2421 | |
| 2422 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2423 | static const char* const xmm_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2424 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7", |
| 2425 | "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15" |
| 2426 | }; |
| 2427 | |
| 2428 | |
| 2429 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2430 | v8::internal::SNPrintF(tmp_buffer_, "%p", addr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2431 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2432 | } |
| 2433 | |
| 2434 | |
| 2435 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 2436 | return NameOfAddress(addr); |
| 2437 | } |
| 2438 | |
| 2439 | |
| 2440 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 2441 | if (0 <= reg && reg < 16) |
| 2442 | return cpu_regs[reg]; |
| 2443 | return "noreg"; |
| 2444 | } |
| 2445 | |
| 2446 | |
| 2447 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 2448 | if (0 <= reg && reg < 16) |
| 2449 | return byte_cpu_regs[reg]; |
| 2450 | return "noreg"; |
| 2451 | } |
| 2452 | |
| 2453 | |
| 2454 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 2455 | if (0 <= reg && reg < 16) |
| 2456 | return xmm_regs[reg]; |
| 2457 | return "noxmmreg"; |
| 2458 | } |
| 2459 | |
| 2460 | |
| 2461 | const char* NameConverter::NameInCode(byte* addr) const { |
| 2462 | // X64 does not embed debug strings at the moment. |
| 2463 | UNREACHABLE(); |
| 2464 | return ""; |
| 2465 | } |
| 2466 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2467 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2468 | //------------------------------------------------------------------------------ |
| 2469 | |
| 2470 | Disassembler::Disassembler(const NameConverter& converter) |
| 2471 | : converter_(converter) { } |
| 2472 | |
| 2473 | Disassembler::~Disassembler() { } |
| 2474 | |
| 2475 | |
| 2476 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 2477 | byte* instruction) { |
| 2478 | DisassemblerX64 d(converter_, CONTINUE_ON_UNIMPLEMENTED_OPCODE); |
| 2479 | return d.InstructionDecode(buffer, instruction); |
| 2480 | } |
| 2481 | |
| 2482 | |
| 2483 | // The X64 assembler does not use constant pools. |
| 2484 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { |
| 2485 | return -1; |
| 2486 | } |
| 2487 | |
| 2488 | |
| 2489 | void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 2490 | NameConverter converter; |
| 2491 | Disassembler d(converter); |
| 2492 | for (byte* pc = begin; pc < end;) { |
| 2493 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 2494 | buffer[0] = '\0'; |
| 2495 | byte* prev_pc = pc; |
| 2496 | pc += d.InstructionDecode(buffer, pc); |
| 2497 | fprintf(f, "%p", prev_pc); |
| 2498 | fprintf(f, " "); |
| 2499 | |
| 2500 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 2501 | fprintf(f, "%02x", *bp); |
| 2502 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2503 | for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2504 | fprintf(f, " "); |
| 2505 | } |
| 2506 | fprintf(f, " %s\n", buffer.start()); |
| 2507 | } |
| 2508 | } |
| 2509 | |
| 2510 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2511 | |
| 2512 | #endif // V8_TARGET_ARCH_X64 |