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 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 145 | enum Prefixes { |
| 146 | ESCAPE_PREFIX = 0x0F, |
| 147 | OPERAND_SIZE_OVERRIDE_PREFIX = 0x66, |
| 148 | ADDRESS_SIZE_OVERRIDE_PREFIX = 0x67, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 149 | VEX3_PREFIX = 0xC4, |
| 150 | VEX2_PREFIX = 0xC5, |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 151 | LOCK_PREFIX = 0xF0, |
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 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 157 | struct InstructionDesc { |
| 158 | const char* mnem; |
| 159 | InstructionType type; |
| 160 | OperandType op_order_; |
| 161 | bool byte_size_operation; // Fixed 8-bit operation. |
| 162 | }; |
| 163 | |
| 164 | |
| 165 | class InstructionTable { |
| 166 | public: |
| 167 | InstructionTable(); |
| 168 | const InstructionDesc& Get(byte x) const { |
| 169 | return instructions_[x]; |
| 170 | } |
| 171 | |
| 172 | private: |
| 173 | InstructionDesc instructions_[256]; |
| 174 | void Clear(); |
| 175 | void Init(); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 176 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 177 | void SetTableRange(InstructionType type, byte start, byte end, bool byte_size, |
| 178 | const char* mnem); |
| 179 | void AddJumpConditionalShort(); |
| 180 | }; |
| 181 | |
| 182 | |
| 183 | InstructionTable::InstructionTable() { |
| 184 | Clear(); |
| 185 | Init(); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | void InstructionTable::Clear() { |
| 190 | for (int i = 0; i < 256; i++) { |
| 191 | instructions_[i].mnem = "(bad)"; |
| 192 | instructions_[i].type = NO_INSTR; |
| 193 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 194 | instructions_[i].byte_size_operation = false; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | |
| 199 | void InstructionTable::Init() { |
| 200 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 201 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 202 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 203 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
| 204 | AddJumpConditionalShort(); |
| 205 | SetTableRange(PUSHPOP_INSTR, 0x50, 0x57, false, "push"); |
| 206 | SetTableRange(PUSHPOP_INSTR, 0x58, 0x5F, false, "pop"); |
| 207 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, false, "mov"); |
| 208 | } |
| 209 | |
| 210 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 211 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 212 | InstructionType type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 213 | for (int i = 0; bm[i].b >= 0; i++) { |
| 214 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 215 | id->mnem = bm[i].mnem; |
| 216 | OperandType op_order = bm[i].op_order_; |
| 217 | id->op_order_ = |
| 218 | static_cast<OperandType>(op_order & ~BYTE_SIZE_OPERAND_FLAG); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 219 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 220 | id->type = type; |
| 221 | id->byte_size_operation = ((op_order & BYTE_SIZE_OPERAND_FLAG) != 0); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | |
| 226 | void InstructionTable::SetTableRange(InstructionType type, |
| 227 | byte start, |
| 228 | byte end, |
| 229 | bool byte_size, |
| 230 | const char* mnem) { |
| 231 | for (byte b = start; b <= end; b++) { |
| 232 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 233 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 234 | id->mnem = mnem; |
| 235 | id->type = type; |
| 236 | id->byte_size_operation = byte_size; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | |
| 241 | void InstructionTable::AddJumpConditionalShort() { |
| 242 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 243 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 244 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 245 | id->mnem = NULL; // Computed depending on condition code. |
| 246 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 251 | static v8::base::LazyInstance<InstructionTable>::type instruction_table = |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 252 | LAZY_INSTANCE_INITIALIZER; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 253 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 254 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 255 | static const InstructionDesc cmov_instructions[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 256 | {"cmovo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 257 | {"cmovno", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 258 | {"cmovc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 259 | {"cmovnc", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 260 | {"cmovz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 261 | {"cmovnz", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 262 | {"cmovna", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 263 | {"cmova", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 264 | {"cmovs", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 265 | {"cmovns", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 266 | {"cmovpe", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 267 | {"cmovpo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 268 | {"cmovl", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 269 | {"cmovge", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 270 | {"cmovle", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 271 | {"cmovg", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false} |
| 272 | }; |
| 273 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 274 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 275 | //------------------------------------------------------------------------------ |
| 276 | // DisassemblerX64 implementation. |
| 277 | |
| 278 | enum UnimplementedOpcodeAction { |
| 279 | CONTINUE_ON_UNIMPLEMENTED_OPCODE, |
| 280 | ABORT_ON_UNIMPLEMENTED_OPCODE |
| 281 | }; |
| 282 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 283 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 284 | // A new DisassemblerX64 object is created to disassemble each instruction. |
| 285 | // The object can only disassemble a single instruction. |
| 286 | class DisassemblerX64 { |
| 287 | public: |
| 288 | DisassemblerX64(const NameConverter& converter, |
| 289 | UnimplementedOpcodeAction unimplemented_action = |
| 290 | ABORT_ON_UNIMPLEMENTED_OPCODE) |
| 291 | : converter_(converter), |
| 292 | tmp_buffer_pos_(0), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 293 | abort_on_unimplemented_(unimplemented_action == |
| 294 | ABORT_ON_UNIMPLEMENTED_OPCODE), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 295 | rex_(0), |
| 296 | operand_size_(0), |
| 297 | group_1_prefix_(0), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 298 | vex_byte0_(0), |
| 299 | vex_byte1_(0), |
| 300 | vex_byte2_(0), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 301 | byte_size_operand_(false), |
| 302 | instruction_table_(instruction_table.Pointer()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 303 | tmp_buffer_[0] = '\0'; |
| 304 | } |
| 305 | |
| 306 | virtual ~DisassemblerX64() { |
| 307 | } |
| 308 | |
| 309 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 310 | // Returns the length of the disassembled machine instruction in bytes. |
| 311 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 312 | |
| 313 | private: |
| 314 | enum OperandSize { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 315 | OPERAND_BYTE_SIZE = 0, |
| 316 | OPERAND_WORD_SIZE = 1, |
| 317 | OPERAND_DOUBLEWORD_SIZE = 2, |
| 318 | OPERAND_QUADWORD_SIZE = 3 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 319 | }; |
| 320 | |
| 321 | const NameConverter& converter_; |
| 322 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 323 | unsigned int tmp_buffer_pos_; |
| 324 | bool abort_on_unimplemented_; |
| 325 | // Prefixes parsed |
| 326 | byte rex_; |
| 327 | byte operand_size_; // 0x66 or (if no group 3 prefix is present) 0x0. |
| 328 | 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] | 329 | byte vex_byte0_; // 0xc4 or 0xc5 |
| 330 | byte vex_byte1_; |
| 331 | byte vex_byte2_; // only for 3 bytes vex prefix |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 332 | // Byte size operand override. |
| 333 | bool byte_size_operand_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 334 | const InstructionTable* const instruction_table_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 335 | |
| 336 | void setRex(byte rex) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 337 | DCHECK_EQ(0x40, rex & 0xF0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 338 | rex_ = rex; |
| 339 | } |
| 340 | |
| 341 | bool rex() { return rex_ != 0; } |
| 342 | |
| 343 | bool rex_b() { return (rex_ & 0x01) != 0; } |
| 344 | |
| 345 | // Actual number of base register given the low bits and the rex.b state. |
| 346 | int base_reg(int low_bits) { return low_bits | ((rex_ & 0x01) << 3); } |
| 347 | |
| 348 | bool rex_x() { return (rex_ & 0x02) != 0; } |
| 349 | |
| 350 | bool rex_r() { return (rex_ & 0x04) != 0; } |
| 351 | |
| 352 | bool rex_w() { return (rex_ & 0x08) != 0; } |
| 353 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 354 | bool vex_w() { |
| 355 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 356 | return vex_byte0_ == VEX3_PREFIX ? (vex_byte2_ & 0x80) != 0 : false; |
| 357 | } |
| 358 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 359 | bool vex_128() { |
| 360 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 361 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 362 | return (checked & 4) == 0; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 363 | } |
| 364 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 365 | bool vex_none() { |
| 366 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 367 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 368 | return (checked & 3) == 0; |
| 369 | } |
| 370 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 371 | bool vex_66() { |
| 372 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 373 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 374 | return (checked & 3) == 1; |
| 375 | } |
| 376 | |
| 377 | bool vex_f3() { |
| 378 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 379 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 380 | return (checked & 3) == 2; |
| 381 | } |
| 382 | |
| 383 | bool vex_f2() { |
| 384 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 385 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 386 | return (checked & 3) == 3; |
| 387 | } |
| 388 | |
| 389 | bool vex_0f() { |
| 390 | if (vex_byte0_ == VEX2_PREFIX) return true; |
| 391 | return (vex_byte1_ & 3) == 1; |
| 392 | } |
| 393 | |
| 394 | bool vex_0f38() { |
| 395 | if (vex_byte0_ == VEX2_PREFIX) return false; |
| 396 | return (vex_byte1_ & 3) == 2; |
| 397 | } |
| 398 | |
| 399 | bool vex_0f3a() { |
| 400 | if (vex_byte0_ == VEX2_PREFIX) return false; |
| 401 | return (vex_byte1_ & 3) == 3; |
| 402 | } |
| 403 | |
| 404 | int vex_vreg() { |
| 405 | DCHECK(vex_byte0_ == VEX3_PREFIX || vex_byte0_ == VEX2_PREFIX); |
| 406 | byte checked = vex_byte0_ == VEX3_PREFIX ? vex_byte2_ : vex_byte1_; |
| 407 | return ~(checked >> 3) & 0xf; |
| 408 | } |
| 409 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 410 | OperandSize operand_size() { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 411 | if (byte_size_operand_) return OPERAND_BYTE_SIZE; |
| 412 | if (rex_w()) return OPERAND_QUADWORD_SIZE; |
| 413 | if (operand_size_ != 0) return OPERAND_WORD_SIZE; |
| 414 | return OPERAND_DOUBLEWORD_SIZE; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 415 | } |
| 416 | |
| 417 | char operand_size_code() { |
| 418 | return "bwlq"[operand_size()]; |
| 419 | } |
| 420 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 421 | char float_size_code() { return "sd"[rex_w()]; } |
| 422 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 423 | const char* NameOfCPURegister(int reg) const { |
| 424 | return converter_.NameOfCPURegister(reg); |
| 425 | } |
| 426 | |
| 427 | const char* NameOfByteCPURegister(int reg) const { |
| 428 | return converter_.NameOfByteCPURegister(reg); |
| 429 | } |
| 430 | |
| 431 | const char* NameOfXMMRegister(int reg) const { |
| 432 | return converter_.NameOfXMMRegister(reg); |
| 433 | } |
| 434 | |
| 435 | const char* NameOfAddress(byte* addr) const { |
| 436 | return converter_.NameOfAddress(addr); |
| 437 | } |
| 438 | |
| 439 | // Disassembler helper functions. |
| 440 | void get_modrm(byte data, |
| 441 | int* mod, |
| 442 | int* regop, |
| 443 | int* rm) { |
| 444 | *mod = (data >> 6) & 3; |
| 445 | *regop = ((data & 0x38) >> 3) | (rex_r() ? 8 : 0); |
| 446 | *rm = (data & 7) | (rex_b() ? 8 : 0); |
| 447 | } |
| 448 | |
| 449 | void get_sib(byte data, |
| 450 | int* scale, |
| 451 | int* index, |
| 452 | int* base) { |
| 453 | *scale = (data >> 6) & 3; |
| 454 | *index = ((data >> 3) & 7) | (rex_x() ? 8 : 0); |
| 455 | *base = (data & 7) | (rex_b() ? 8 : 0); |
| 456 | } |
| 457 | |
| 458 | typedef const char* (DisassemblerX64::*RegisterNameMapping)(int reg) const; |
| 459 | |
| 460 | int PrintRightOperandHelper(byte* modrmp, |
| 461 | RegisterNameMapping register_name); |
| 462 | int PrintRightOperand(byte* modrmp); |
| 463 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 464 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 465 | int PrintOperands(const char* mnem, |
| 466 | OperandType op_order, |
| 467 | byte* data); |
| 468 | int PrintImmediate(byte* data, OperandSize size); |
| 469 | int PrintImmediateOp(byte* data); |
| 470 | const char* TwoByteMnemonic(byte opcode); |
| 471 | int TwoByteOpcodeInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 472 | int F6F7Instruction(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 473 | int ShiftInstruction(byte* data); |
| 474 | int JumpShort(byte* data); |
| 475 | int JumpConditional(byte* data); |
| 476 | int JumpConditionalShort(byte* data); |
| 477 | int SetCC(byte* data); |
| 478 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 479 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 480 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 481 | int AVXInstruction(byte* data); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 482 | PRINTF_FORMAT(2, 3) void AppendToBuffer(const char* format, ...); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 483 | |
| 484 | void UnimplementedInstruction() { |
| 485 | if (abort_on_unimplemented_) { |
| 486 | CHECK(false); |
| 487 | } else { |
| 488 | AppendToBuffer("'Unimplemented Instruction'"); |
| 489 | } |
| 490 | } |
| 491 | }; |
| 492 | |
| 493 | |
| 494 | void DisassemblerX64::AppendToBuffer(const char* format, ...) { |
| 495 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 496 | va_list args; |
| 497 | va_start(args, format); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 498 | int result = v8::internal::VSNPrintF(buf, format, args); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 499 | va_end(args); |
| 500 | tmp_buffer_pos_ += result; |
| 501 | } |
| 502 | |
| 503 | |
| 504 | int DisassemblerX64::PrintRightOperandHelper( |
| 505 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 506 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 507 | int mod, regop, rm; |
| 508 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 509 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 510 | &DisassemblerX64::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 511 | switch (mod) { |
| 512 | case 0: |
| 513 | if ((rm & 7) == 5) { |
| 514 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 515 | AppendToBuffer("[rip+0x%x]", disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 516 | return 5; |
| 517 | } else if ((rm & 7) == 4) { |
| 518 | // Codes for SIB byte. |
| 519 | byte sib = *(modrmp + 1); |
| 520 | int scale, index, base; |
| 521 | get_sib(sib, &scale, &index, &base); |
| 522 | if (index == 4 && (base & 7) == 4 && scale == 0 /*times_1*/) { |
| 523 | // index == rsp means no index. Only use sib byte with no index for |
| 524 | // rsp and r12 base. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 525 | AppendToBuffer("[%s]", NameOfCPURegister(base)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 526 | return 2; |
| 527 | } else if (base == 5) { |
| 528 | // base == rbp means no base register (when mod == 0). |
| 529 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 530 | AppendToBuffer("[%s*%d%s0x%x]", |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 531 | NameOfCPURegister(index), |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 532 | 1 << scale, |
| 533 | disp < 0 ? "-" : "+", |
| 534 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 535 | return 6; |
| 536 | } else if (index != 4 && base != 5) { |
| 537 | // [base+index*scale] |
| 538 | AppendToBuffer("[%s+%s*%d]", |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 539 | NameOfCPURegister(base), |
| 540 | NameOfCPURegister(index), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 541 | 1 << scale); |
| 542 | return 2; |
| 543 | } else { |
| 544 | UnimplementedInstruction(); |
| 545 | return 1; |
| 546 | } |
| 547 | } else { |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 548 | AppendToBuffer("[%s]", NameOfCPURegister(rm)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 549 | return 1; |
| 550 | } |
| 551 | break; |
| 552 | case 1: // fall through |
| 553 | case 2: |
| 554 | if ((rm & 7) == 4) { |
| 555 | byte sib = *(modrmp + 1); |
| 556 | int scale, index, base; |
| 557 | get_sib(sib, &scale, &index, &base); |
| 558 | int disp = (mod == 2) ? *reinterpret_cast<int32_t*>(modrmp + 2) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 559 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 560 | if (index == 4 && (base & 7) == 4 && scale == 0 /*times_1*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 561 | AppendToBuffer("[%s%s0x%x]", |
| 562 | NameOfCPURegister(base), |
| 563 | disp < 0 ? "-" : "+", |
| 564 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 565 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 566 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
| 567 | NameOfCPURegister(base), |
| 568 | NameOfCPURegister(index), |
| 569 | 1 << scale, |
| 570 | disp < 0 ? "-" : "+", |
| 571 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 572 | } |
| 573 | return mod == 2 ? 6 : 3; |
| 574 | } else { |
| 575 | // No sib. |
| 576 | int disp = (mod == 2) ? *reinterpret_cast<int32_t*>(modrmp + 1) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 577 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 578 | AppendToBuffer("[%s%s0x%x]", |
| 579 | NameOfCPURegister(rm), |
| 580 | disp < 0 ? "-" : "+", |
| 581 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 582 | return (mod == 2) ? 5 : 2; |
| 583 | } |
| 584 | break; |
| 585 | case 3: |
| 586 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 587 | return 1; |
| 588 | default: |
| 589 | UnimplementedInstruction(); |
| 590 | return 1; |
| 591 | } |
| 592 | UNREACHABLE(); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | int DisassemblerX64::PrintImmediate(byte* data, OperandSize size) { |
| 597 | int64_t value; |
| 598 | int count; |
| 599 | switch (size) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 600 | case OPERAND_BYTE_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 601 | value = *data; |
| 602 | count = 1; |
| 603 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 604 | case OPERAND_WORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 605 | value = *reinterpret_cast<int16_t*>(data); |
| 606 | count = 2; |
| 607 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 608 | case OPERAND_DOUBLEWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 609 | value = *reinterpret_cast<uint32_t*>(data); |
| 610 | count = 4; |
| 611 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 612 | case OPERAND_QUADWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 613 | value = *reinterpret_cast<int32_t*>(data); |
| 614 | count = 4; |
| 615 | break; |
| 616 | default: |
| 617 | UNREACHABLE(); |
| 618 | value = 0; // Initialize variables on all paths to satisfy the compiler. |
| 619 | count = 0; |
| 620 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 621 | AppendToBuffer("%" PRIx64, value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 622 | return count; |
| 623 | } |
| 624 | |
| 625 | |
| 626 | int DisassemblerX64::PrintRightOperand(byte* modrmp) { |
| 627 | return PrintRightOperandHelper(modrmp, |
| 628 | &DisassemblerX64::NameOfCPURegister); |
| 629 | } |
| 630 | |
| 631 | |
| 632 | int DisassemblerX64::PrintRightByteOperand(byte* modrmp) { |
| 633 | return PrintRightOperandHelper(modrmp, |
| 634 | &DisassemblerX64::NameOfByteCPURegister); |
| 635 | } |
| 636 | |
| 637 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 638 | int DisassemblerX64::PrintRightXMMOperand(byte* modrmp) { |
| 639 | return PrintRightOperandHelper(modrmp, |
| 640 | &DisassemblerX64::NameOfXMMRegister); |
| 641 | } |
| 642 | |
| 643 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 644 | // Returns number of bytes used including the current *data. |
| 645 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 646 | int DisassemblerX64::PrintOperands(const char* mnem, |
| 647 | OperandType op_order, |
| 648 | byte* data) { |
| 649 | byte modrm = *data; |
| 650 | int mod, regop, rm; |
| 651 | get_modrm(modrm, &mod, ®op, &rm); |
| 652 | int advance = 0; |
| 653 | const char* register_name = |
| 654 | byte_size_operand_ ? NameOfByteCPURegister(regop) |
| 655 | : NameOfCPURegister(regop); |
| 656 | switch (op_order) { |
| 657 | case REG_OPER_OP_ORDER: { |
| 658 | AppendToBuffer("%s%c %s,", |
| 659 | mnem, |
| 660 | operand_size_code(), |
| 661 | register_name); |
| 662 | advance = byte_size_operand_ ? PrintRightByteOperand(data) |
| 663 | : PrintRightOperand(data); |
| 664 | break; |
| 665 | } |
| 666 | case OPER_REG_OP_ORDER: { |
| 667 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 668 | advance = byte_size_operand_ ? PrintRightByteOperand(data) |
| 669 | : PrintRightOperand(data); |
| 670 | AppendToBuffer(",%s", register_name); |
| 671 | break; |
| 672 | } |
| 673 | default: |
| 674 | UNREACHABLE(); |
| 675 | break; |
| 676 | } |
| 677 | return advance; |
| 678 | } |
| 679 | |
| 680 | |
| 681 | // Returns number of bytes used by machine instruction, including *data byte. |
| 682 | // Writes immediate instructions to 'tmp_buffer_'. |
| 683 | int DisassemblerX64::PrintImmediateOp(byte* data) { |
| 684 | bool byte_size_immediate = (*data & 0x02) != 0; |
| 685 | byte modrm = *(data + 1); |
| 686 | int mod, regop, rm; |
| 687 | get_modrm(modrm, &mod, ®op, &rm); |
| 688 | const char* mnem = "Imm???"; |
| 689 | switch (regop) { |
| 690 | case 0: |
| 691 | mnem = "add"; |
| 692 | break; |
| 693 | case 1: |
| 694 | mnem = "or"; |
| 695 | break; |
| 696 | case 2: |
| 697 | mnem = "adc"; |
| 698 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 699 | case 3: |
| 700 | mnem = "sbb"; |
| 701 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 702 | case 4: |
| 703 | mnem = "and"; |
| 704 | break; |
| 705 | case 5: |
| 706 | mnem = "sub"; |
| 707 | break; |
| 708 | case 6: |
| 709 | mnem = "xor"; |
| 710 | break; |
| 711 | case 7: |
| 712 | mnem = "cmp"; |
| 713 | break; |
| 714 | default: |
| 715 | UnimplementedInstruction(); |
| 716 | } |
| 717 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 718 | int count = PrintRightOperand(data + 1); |
| 719 | AppendToBuffer(",0x"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 720 | OperandSize immediate_size = |
| 721 | byte_size_immediate ? OPERAND_BYTE_SIZE : operand_size(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 722 | count += PrintImmediate(data + 1 + count, immediate_size); |
| 723 | return 1 + count; |
| 724 | } |
| 725 | |
| 726 | |
| 727 | // Returns number of bytes used, including *data. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 728 | int DisassemblerX64::F6F7Instruction(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 729 | DCHECK(*data == 0xF7 || *data == 0xF6); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 730 | byte modrm = *(data + 1); |
| 731 | int mod, regop, rm; |
| 732 | get_modrm(modrm, &mod, ®op, &rm); |
| 733 | if (mod == 3 && regop != 0) { |
| 734 | const char* mnem = NULL; |
| 735 | switch (regop) { |
| 736 | case 2: |
| 737 | mnem = "not"; |
| 738 | break; |
| 739 | case 3: |
| 740 | mnem = "neg"; |
| 741 | break; |
| 742 | case 4: |
| 743 | mnem = "mul"; |
| 744 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 745 | case 5: |
| 746 | mnem = "imul"; |
| 747 | break; |
| 748 | case 6: |
| 749 | mnem = "div"; |
| 750 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 751 | case 7: |
| 752 | mnem = "idiv"; |
| 753 | break; |
| 754 | default: |
| 755 | UnimplementedInstruction(); |
| 756 | } |
| 757 | AppendToBuffer("%s%c %s", |
| 758 | mnem, |
| 759 | operand_size_code(), |
| 760 | NameOfCPURegister(rm)); |
| 761 | return 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 762 | } else if (regop == 0) { |
| 763 | AppendToBuffer("test%c ", operand_size_code()); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 764 | int count = PrintRightOperand(data + 1); // Use name of 64-bit register. |
| 765 | AppendToBuffer(",0x"); |
| 766 | count += PrintImmediate(data + 1 + count, operand_size()); |
| 767 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 768 | } else { |
| 769 | UnimplementedInstruction(); |
| 770 | return 2; |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | |
| 775 | int DisassemblerX64::ShiftInstruction(byte* data) { |
| 776 | byte op = *data & (~1); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 777 | int count = 1; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 778 | if (op != 0xD0 && op != 0xD2 && op != 0xC0) { |
| 779 | UnimplementedInstruction(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 780 | return count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 781 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 782 | // Print mneumonic. |
| 783 | { |
| 784 | byte modrm = *(data + count); |
| 785 | int mod, regop, rm; |
| 786 | get_modrm(modrm, &mod, ®op, &rm); |
| 787 | regop &= 0x7; // The REX.R bit does not affect the operation. |
| 788 | const char* mnem = NULL; |
| 789 | switch (regop) { |
| 790 | case 0: |
| 791 | mnem = "rol"; |
| 792 | break; |
| 793 | case 1: |
| 794 | mnem = "ror"; |
| 795 | break; |
| 796 | case 2: |
| 797 | mnem = "rcl"; |
| 798 | break; |
| 799 | case 3: |
| 800 | mnem = "rcr"; |
| 801 | break; |
| 802 | case 4: |
| 803 | mnem = "shl"; |
| 804 | break; |
| 805 | case 5: |
| 806 | mnem = "shr"; |
| 807 | break; |
| 808 | case 7: |
| 809 | mnem = "sar"; |
| 810 | break; |
| 811 | default: |
| 812 | UnimplementedInstruction(); |
| 813 | return count + 1; |
| 814 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 815 | DCHECK_NOT_NULL(mnem); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 816 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 817 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 818 | count += PrintRightOperand(data + count); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 819 | if (op == 0xD2) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 820 | AppendToBuffer(", cl"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 821 | } else { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 822 | int imm8 = -1; |
| 823 | if (op == 0xD0) { |
| 824 | imm8 = 1; |
| 825 | } else { |
| 826 | DCHECK_EQ(0xC0, op); |
| 827 | imm8 = *(data + count); |
| 828 | count++; |
| 829 | } |
| 830 | AppendToBuffer(", %d", imm8); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 831 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 832 | return count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | |
| 836 | // Returns number of bytes used, including *data. |
| 837 | int DisassemblerX64::JumpShort(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 838 | DCHECK_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 839 | byte b = *(data + 1); |
| 840 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 841 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 842 | return 2; |
| 843 | } |
| 844 | |
| 845 | |
| 846 | // Returns number of bytes used, including *data. |
| 847 | int DisassemblerX64::JumpConditional(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 848 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 849 | byte cond = *(data + 1) & 0x0F; |
| 850 | byte* dest = data + *reinterpret_cast<int32_t*>(data + 2) + 6; |
| 851 | const char* mnem = conditional_code_suffix[cond]; |
| 852 | AppendToBuffer("j%s %s", mnem, NameOfAddress(dest)); |
| 853 | return 6; // includes 0x0F |
| 854 | } |
| 855 | |
| 856 | |
| 857 | // Returns number of bytes used, including *data. |
| 858 | int DisassemblerX64::JumpConditionalShort(byte* data) { |
| 859 | byte cond = *data & 0x0F; |
| 860 | byte b = *(data + 1); |
| 861 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 862 | const char* mnem = conditional_code_suffix[cond]; |
| 863 | AppendToBuffer("j%s %s", mnem, NameOfAddress(dest)); |
| 864 | return 2; |
| 865 | } |
| 866 | |
| 867 | |
| 868 | // Returns number of bytes used, including *data. |
| 869 | int DisassemblerX64::SetCC(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 870 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 871 | byte cond = *(data + 1) & 0x0F; |
| 872 | const char* mnem = conditional_code_suffix[cond]; |
| 873 | AppendToBuffer("set%s%c ", mnem, operand_size_code()); |
| 874 | PrintRightByteOperand(data + 2); |
| 875 | return 3; // includes 0x0F |
| 876 | } |
| 877 | |
| 878 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 879 | int DisassemblerX64::AVXInstruction(byte* data) { |
| 880 | byte opcode = *data; |
| 881 | byte* current = data + 1; |
| 882 | if (vex_66() && vex_0f38()) { |
| 883 | int mod, regop, rm, vvvv = vex_vreg(); |
| 884 | get_modrm(*current, &mod, ®op, &rm); |
| 885 | switch (opcode) { |
| 886 | case 0x99: |
| 887 | AppendToBuffer("vfmadd132s%c %s,%s,", float_size_code(), |
| 888 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 889 | current += PrintRightXMMOperand(current); |
| 890 | break; |
| 891 | case 0xa9: |
| 892 | AppendToBuffer("vfmadd213s%c %s,%s,", float_size_code(), |
| 893 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 894 | current += PrintRightXMMOperand(current); |
| 895 | break; |
| 896 | case 0xb9: |
| 897 | AppendToBuffer("vfmadd231s%c %s,%s,", float_size_code(), |
| 898 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 899 | current += PrintRightXMMOperand(current); |
| 900 | break; |
| 901 | case 0x9b: |
| 902 | AppendToBuffer("vfmsub132s%c %s,%s,", float_size_code(), |
| 903 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 904 | current += PrintRightXMMOperand(current); |
| 905 | break; |
| 906 | case 0xab: |
| 907 | AppendToBuffer("vfmsub213s%c %s,%s,", float_size_code(), |
| 908 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 909 | current += PrintRightXMMOperand(current); |
| 910 | break; |
| 911 | case 0xbb: |
| 912 | AppendToBuffer("vfmsub231s%c %s,%s,", float_size_code(), |
| 913 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 914 | current += PrintRightXMMOperand(current); |
| 915 | break; |
| 916 | case 0x9d: |
| 917 | AppendToBuffer("vfnmadd132s%c %s,%s,", float_size_code(), |
| 918 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 919 | current += PrintRightXMMOperand(current); |
| 920 | break; |
| 921 | case 0xad: |
| 922 | AppendToBuffer("vfnmadd213s%c %s,%s,", float_size_code(), |
| 923 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 924 | current += PrintRightXMMOperand(current); |
| 925 | break; |
| 926 | case 0xbd: |
| 927 | AppendToBuffer("vfnmadd231s%c %s,%s,", float_size_code(), |
| 928 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 929 | current += PrintRightXMMOperand(current); |
| 930 | break; |
| 931 | case 0x9f: |
| 932 | AppendToBuffer("vfnmsub132s%c %s,%s,", float_size_code(), |
| 933 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 934 | current += PrintRightXMMOperand(current); |
| 935 | break; |
| 936 | case 0xaf: |
| 937 | AppendToBuffer("vfnmsub213s%c %s,%s,", float_size_code(), |
| 938 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 939 | current += PrintRightXMMOperand(current); |
| 940 | break; |
| 941 | case 0xbf: |
| 942 | AppendToBuffer("vfnmsub231s%c %s,%s,", float_size_code(), |
| 943 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 944 | current += PrintRightXMMOperand(current); |
| 945 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 946 | case 0xf7: |
| 947 | AppendToBuffer("shlx%c %s,", operand_size_code(), |
| 948 | NameOfCPURegister(regop)); |
| 949 | current += PrintRightOperand(current); |
| 950 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 951 | break; |
| 952 | default: |
| 953 | UnimplementedInstruction(); |
| 954 | } |
| 955 | } else if (vex_66() && vex_0f3a()) { |
| 956 | int mod, regop, rm, vvvv = vex_vreg(); |
| 957 | get_modrm(*current, &mod, ®op, &rm); |
| 958 | switch (opcode) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 959 | case 0x0a: |
| 960 | AppendToBuffer("vroundss %s,%s,", NameOfXMMRegister(regop), |
| 961 | NameOfXMMRegister(vvvv)); |
| 962 | current += PrintRightXMMOperand(current); |
| 963 | AppendToBuffer(",0x%x", *current++); |
| 964 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 965 | case 0x0b: |
| 966 | AppendToBuffer("vroundsd %s,%s,", NameOfXMMRegister(regop), |
| 967 | NameOfXMMRegister(vvvv)); |
| 968 | current += PrintRightXMMOperand(current); |
| 969 | AppendToBuffer(",0x%x", *current++); |
| 970 | break; |
| 971 | default: |
| 972 | UnimplementedInstruction(); |
| 973 | } |
| 974 | } else if (vex_f3() && vex_0f()) { |
| 975 | int mod, regop, rm, vvvv = vex_vreg(); |
| 976 | get_modrm(*current, &mod, ®op, &rm); |
| 977 | switch (opcode) { |
| 978 | case 0x10: |
| 979 | AppendToBuffer("vmovss %s,", NameOfXMMRegister(regop)); |
| 980 | if (mod == 3) { |
| 981 | AppendToBuffer("%s,", NameOfXMMRegister(vvvv)); |
| 982 | } |
| 983 | current += PrintRightXMMOperand(current); |
| 984 | break; |
| 985 | case 0x11: |
| 986 | AppendToBuffer("vmovss "); |
| 987 | current += PrintRightXMMOperand(current); |
| 988 | if (mod == 3) { |
| 989 | AppendToBuffer(",%s", NameOfXMMRegister(vvvv)); |
| 990 | } |
| 991 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 992 | break; |
| 993 | case 0x2a: |
| 994 | AppendToBuffer("%s %s,%s,", vex_w() ? "vcvtqsi2ss" : "vcvtlsi2ss", |
| 995 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 996 | current += PrintRightOperand(current); |
| 997 | break; |
| 998 | case 0x2c: |
| 999 | AppendToBuffer("vcvttss2si%s %s,", vex_w() ? "q" : "", |
| 1000 | NameOfCPURegister(regop)); |
| 1001 | current += PrintRightXMMOperand(current); |
| 1002 | break; |
| 1003 | case 0x58: |
| 1004 | AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop), |
| 1005 | NameOfXMMRegister(vvvv)); |
| 1006 | current += PrintRightXMMOperand(current); |
| 1007 | break; |
| 1008 | case 0x59: |
| 1009 | AppendToBuffer("vmulss %s,%s,", NameOfXMMRegister(regop), |
| 1010 | NameOfXMMRegister(vvvv)); |
| 1011 | current += PrintRightXMMOperand(current); |
| 1012 | break; |
| 1013 | case 0x5a: |
| 1014 | AppendToBuffer("vcvtss2sd %s,%s,", NameOfXMMRegister(regop), |
| 1015 | NameOfXMMRegister(vvvv)); |
| 1016 | current += PrintRightXMMOperand(current); |
| 1017 | break; |
| 1018 | case 0x5c: |
| 1019 | AppendToBuffer("vsubss %s,%s,", NameOfXMMRegister(regop), |
| 1020 | NameOfXMMRegister(vvvv)); |
| 1021 | current += PrintRightXMMOperand(current); |
| 1022 | break; |
| 1023 | case 0x5d: |
| 1024 | AppendToBuffer("vminss %s,%s,", NameOfXMMRegister(regop), |
| 1025 | NameOfXMMRegister(vvvv)); |
| 1026 | current += PrintRightXMMOperand(current); |
| 1027 | break; |
| 1028 | case 0x5e: |
| 1029 | AppendToBuffer("vdivss %s,%s,", NameOfXMMRegister(regop), |
| 1030 | NameOfXMMRegister(vvvv)); |
| 1031 | current += PrintRightXMMOperand(current); |
| 1032 | break; |
| 1033 | case 0x5f: |
| 1034 | AppendToBuffer("vmaxss %s,%s,", NameOfXMMRegister(regop), |
| 1035 | NameOfXMMRegister(vvvv)); |
| 1036 | current += PrintRightXMMOperand(current); |
| 1037 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1038 | default: |
| 1039 | UnimplementedInstruction(); |
| 1040 | } |
| 1041 | } else if (vex_f2() && vex_0f()) { |
| 1042 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1043 | get_modrm(*current, &mod, ®op, &rm); |
| 1044 | switch (opcode) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1045 | case 0x10: |
| 1046 | AppendToBuffer("vmovsd %s,", NameOfXMMRegister(regop)); |
| 1047 | if (mod == 3) { |
| 1048 | AppendToBuffer("%s,", NameOfXMMRegister(vvvv)); |
| 1049 | } |
| 1050 | current += PrintRightXMMOperand(current); |
| 1051 | break; |
| 1052 | case 0x11: |
| 1053 | AppendToBuffer("vmovsd "); |
| 1054 | current += PrintRightXMMOperand(current); |
| 1055 | if (mod == 3) { |
| 1056 | AppendToBuffer(",%s", NameOfXMMRegister(vvvv)); |
| 1057 | } |
| 1058 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1059 | break; |
| 1060 | case 0x2a: |
| 1061 | AppendToBuffer("%s %s,%s,", vex_w() ? "vcvtqsi2sd" : "vcvtlsi2sd", |
| 1062 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 1063 | current += PrintRightOperand(current); |
| 1064 | break; |
| 1065 | case 0x2c: |
| 1066 | AppendToBuffer("vcvttsd2si%s %s,", vex_w() ? "q" : "", |
| 1067 | NameOfCPURegister(regop)); |
| 1068 | current += PrintRightXMMOperand(current); |
| 1069 | break; |
| 1070 | case 0x2d: |
| 1071 | AppendToBuffer("vcvtsd2si%s %s,", vex_w() ? "q" : "", |
| 1072 | NameOfCPURegister(regop)); |
| 1073 | current += PrintRightXMMOperand(current); |
| 1074 | break; |
| 1075 | case 0x51: |
| 1076 | AppendToBuffer("vsqrtsd %s,%s,", NameOfXMMRegister(regop), |
| 1077 | NameOfXMMRegister(vvvv)); |
| 1078 | current += PrintRightXMMOperand(current); |
| 1079 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1080 | case 0x58: |
| 1081 | AppendToBuffer("vaddsd %s,%s,", NameOfXMMRegister(regop), |
| 1082 | NameOfXMMRegister(vvvv)); |
| 1083 | current += PrintRightXMMOperand(current); |
| 1084 | break; |
| 1085 | case 0x59: |
| 1086 | AppendToBuffer("vmulsd %s,%s,", NameOfXMMRegister(regop), |
| 1087 | NameOfXMMRegister(vvvv)); |
| 1088 | current += PrintRightXMMOperand(current); |
| 1089 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1090 | case 0x5a: |
| 1091 | AppendToBuffer("vcvtsd2ss %s,%s,", NameOfXMMRegister(regop), |
| 1092 | NameOfXMMRegister(vvvv)); |
| 1093 | current += PrintRightXMMOperand(current); |
| 1094 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1095 | case 0x5c: |
| 1096 | AppendToBuffer("vsubsd %s,%s,", NameOfXMMRegister(regop), |
| 1097 | NameOfXMMRegister(vvvv)); |
| 1098 | current += PrintRightXMMOperand(current); |
| 1099 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1100 | case 0x5d: |
| 1101 | AppendToBuffer("vminsd %s,%s,", NameOfXMMRegister(regop), |
| 1102 | NameOfXMMRegister(vvvv)); |
| 1103 | current += PrintRightXMMOperand(current); |
| 1104 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1105 | case 0x5e: |
| 1106 | AppendToBuffer("vdivsd %s,%s,", NameOfXMMRegister(regop), |
| 1107 | NameOfXMMRegister(vvvv)); |
| 1108 | current += PrintRightXMMOperand(current); |
| 1109 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1110 | case 0x5f: |
| 1111 | AppendToBuffer("vmaxsd %s,%s,", NameOfXMMRegister(regop), |
| 1112 | NameOfXMMRegister(vvvv)); |
| 1113 | current += PrintRightXMMOperand(current); |
| 1114 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1115 | default: |
| 1116 | UnimplementedInstruction(); |
| 1117 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1118 | } else if (vex_none() && vex_0f38()) { |
| 1119 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1120 | get_modrm(*current, &mod, ®op, &rm); |
| 1121 | const char* mnem = "?"; |
| 1122 | switch (opcode) { |
| 1123 | case 0xf2: |
| 1124 | AppendToBuffer("andn%c %s,%s,", operand_size_code(), |
| 1125 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1126 | current += PrintRightOperand(current); |
| 1127 | break; |
| 1128 | case 0xf5: |
| 1129 | AppendToBuffer("bzhi%c %s,", operand_size_code(), |
| 1130 | NameOfCPURegister(regop)); |
| 1131 | current += PrintRightOperand(current); |
| 1132 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1133 | break; |
| 1134 | case 0xf7: |
| 1135 | AppendToBuffer("bextr%c %s,", operand_size_code(), |
| 1136 | NameOfCPURegister(regop)); |
| 1137 | current += PrintRightOperand(current); |
| 1138 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1139 | break; |
| 1140 | case 0xf3: |
| 1141 | switch (regop) { |
| 1142 | case 1: |
| 1143 | mnem = "blsr"; |
| 1144 | break; |
| 1145 | case 2: |
| 1146 | mnem = "blsmsk"; |
| 1147 | break; |
| 1148 | case 3: |
| 1149 | mnem = "blsi"; |
| 1150 | break; |
| 1151 | default: |
| 1152 | UnimplementedInstruction(); |
| 1153 | } |
| 1154 | AppendToBuffer("%s%c %s,", mnem, operand_size_code(), |
| 1155 | NameOfCPURegister(vvvv)); |
| 1156 | current += PrintRightOperand(current); |
| 1157 | mnem = "?"; |
| 1158 | break; |
| 1159 | default: |
| 1160 | UnimplementedInstruction(); |
| 1161 | } |
| 1162 | } else if (vex_f2() && vex_0f38()) { |
| 1163 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1164 | get_modrm(*current, &mod, ®op, &rm); |
| 1165 | switch (opcode) { |
| 1166 | case 0xf5: |
| 1167 | AppendToBuffer("pdep%c %s,%s,", operand_size_code(), |
| 1168 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1169 | current += PrintRightOperand(current); |
| 1170 | break; |
| 1171 | case 0xf6: |
| 1172 | AppendToBuffer("mulx%c %s,%s,", operand_size_code(), |
| 1173 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1174 | current += PrintRightOperand(current); |
| 1175 | break; |
| 1176 | case 0xf7: |
| 1177 | AppendToBuffer("shrx%c %s,", operand_size_code(), |
| 1178 | NameOfCPURegister(regop)); |
| 1179 | current += PrintRightOperand(current); |
| 1180 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1181 | break; |
| 1182 | default: |
| 1183 | UnimplementedInstruction(); |
| 1184 | } |
| 1185 | } else if (vex_f3() && vex_0f38()) { |
| 1186 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1187 | get_modrm(*current, &mod, ®op, &rm); |
| 1188 | switch (opcode) { |
| 1189 | case 0xf5: |
| 1190 | AppendToBuffer("pext%c %s,%s,", operand_size_code(), |
| 1191 | NameOfCPURegister(regop), NameOfCPURegister(vvvv)); |
| 1192 | current += PrintRightOperand(current); |
| 1193 | break; |
| 1194 | case 0xf7: |
| 1195 | AppendToBuffer("sarx%c %s,", operand_size_code(), |
| 1196 | NameOfCPURegister(regop)); |
| 1197 | current += PrintRightOperand(current); |
| 1198 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 1199 | break; |
| 1200 | default: |
| 1201 | UnimplementedInstruction(); |
| 1202 | } |
| 1203 | } else if (vex_f2() && vex_0f3a()) { |
| 1204 | int mod, regop, rm; |
| 1205 | get_modrm(*current, &mod, ®op, &rm); |
| 1206 | switch (opcode) { |
| 1207 | case 0xf0: |
| 1208 | AppendToBuffer("rorx%c %s,", operand_size_code(), |
| 1209 | NameOfCPURegister(regop)); |
| 1210 | current += PrintRightOperand(current); |
| 1211 | switch (operand_size()) { |
| 1212 | case OPERAND_DOUBLEWORD_SIZE: |
| 1213 | AppendToBuffer(",%d", *current & 0x1f); |
| 1214 | break; |
| 1215 | case OPERAND_QUADWORD_SIZE: |
| 1216 | AppendToBuffer(",%d", *current & 0x3f); |
| 1217 | break; |
| 1218 | default: |
| 1219 | UnimplementedInstruction(); |
| 1220 | } |
| 1221 | current += 1; |
| 1222 | break; |
| 1223 | default: |
| 1224 | UnimplementedInstruction(); |
| 1225 | } |
| 1226 | } else if (vex_none() && vex_0f()) { |
| 1227 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1228 | get_modrm(*current, &mod, ®op, &rm); |
| 1229 | switch (opcode) { |
| 1230 | case 0x28: |
| 1231 | AppendToBuffer("vmovaps %s,", NameOfXMMRegister(regop)); |
| 1232 | current += PrintRightXMMOperand(current); |
| 1233 | break; |
| 1234 | case 0x29: |
| 1235 | AppendToBuffer("vmovaps "); |
| 1236 | current += PrintRightXMMOperand(current); |
| 1237 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1238 | break; |
| 1239 | case 0x2e: |
| 1240 | AppendToBuffer("vucomiss %s,", NameOfXMMRegister(regop)); |
| 1241 | current += PrintRightXMMOperand(current); |
| 1242 | break; |
| 1243 | case 0x54: |
| 1244 | AppendToBuffer("vandps %s,%s,", NameOfXMMRegister(regop), |
| 1245 | NameOfXMMRegister(vvvv)); |
| 1246 | current += PrintRightXMMOperand(current); |
| 1247 | break; |
| 1248 | case 0x57: |
| 1249 | AppendToBuffer("vxorps %s,%s,", NameOfXMMRegister(regop), |
| 1250 | NameOfXMMRegister(vvvv)); |
| 1251 | current += PrintRightXMMOperand(current); |
| 1252 | break; |
| 1253 | default: |
| 1254 | UnimplementedInstruction(); |
| 1255 | } |
| 1256 | } else if (vex_66() && vex_0f()) { |
| 1257 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1258 | get_modrm(*current, &mod, ®op, &rm); |
| 1259 | switch (opcode) { |
| 1260 | case 0x28: |
| 1261 | AppendToBuffer("vmovapd %s,", NameOfXMMRegister(regop)); |
| 1262 | current += PrintRightXMMOperand(current); |
| 1263 | break; |
| 1264 | case 0x29: |
| 1265 | AppendToBuffer("vmovapd "); |
| 1266 | current += PrintRightXMMOperand(current); |
| 1267 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1268 | break; |
| 1269 | case 0x2e: |
| 1270 | AppendToBuffer("vucomisd %s,", NameOfXMMRegister(regop)); |
| 1271 | current += PrintRightXMMOperand(current); |
| 1272 | break; |
| 1273 | case 0x50: |
| 1274 | AppendToBuffer("vmovmskpd %s,", NameOfCPURegister(regop)); |
| 1275 | current += PrintRightXMMOperand(current); |
| 1276 | break; |
| 1277 | case 0x54: |
| 1278 | AppendToBuffer("vandpd %s,%s,", NameOfXMMRegister(regop), |
| 1279 | NameOfXMMRegister(vvvv)); |
| 1280 | current += PrintRightXMMOperand(current); |
| 1281 | break; |
| 1282 | case 0x56: |
| 1283 | AppendToBuffer("vorpd %s,%s,", NameOfXMMRegister(regop), |
| 1284 | NameOfXMMRegister(vvvv)); |
| 1285 | current += PrintRightXMMOperand(current); |
| 1286 | break; |
| 1287 | case 0x57: |
| 1288 | AppendToBuffer("vxorpd %s,%s,", NameOfXMMRegister(regop), |
| 1289 | NameOfXMMRegister(vvvv)); |
| 1290 | current += PrintRightXMMOperand(current); |
| 1291 | break; |
| 1292 | case 0x6e: |
| 1293 | AppendToBuffer("vmov%c %s,", vex_w() ? 'q' : 'd', |
| 1294 | NameOfXMMRegister(regop)); |
| 1295 | current += PrintRightOperand(current); |
| 1296 | break; |
| 1297 | case 0x73: |
| 1298 | AppendToBuffer("%s %s,", regop == 6 ? "vpsllq" : "vpsrlq", |
| 1299 | NameOfXMMRegister(vvvv)); |
| 1300 | current += PrintRightXMMOperand(current); |
| 1301 | AppendToBuffer(",%u", *current++); |
| 1302 | break; |
| 1303 | case 0x76: |
| 1304 | AppendToBuffer("vpcmpeqd %s,%s,", NameOfXMMRegister(regop), |
| 1305 | NameOfXMMRegister(vvvv)); |
| 1306 | current += PrintRightXMMOperand(current); |
| 1307 | break; |
| 1308 | case 0x7e: |
| 1309 | AppendToBuffer("vmov%c ", vex_w() ? 'q' : 'd'); |
| 1310 | current += PrintRightOperand(current); |
| 1311 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1312 | break; |
| 1313 | default: |
| 1314 | UnimplementedInstruction(); |
| 1315 | } |
| 1316 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1317 | } else { |
| 1318 | UnimplementedInstruction(); |
| 1319 | } |
| 1320 | |
| 1321 | return static_cast<int>(current - data); |
| 1322 | } |
| 1323 | |
| 1324 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1325 | // Returns number of bytes used, including *data. |
| 1326 | int DisassemblerX64::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1327 | byte escape_opcode = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1328 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1329 | byte modrm_byte = *(data+1); |
| 1330 | |
| 1331 | if (modrm_byte >= 0xC0) { |
| 1332 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 1333 | } else { |
| 1334 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1335 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1336 | } |
| 1337 | |
| 1338 | int DisassemblerX64::MemoryFPUInstruction(int escape_opcode, |
| 1339 | int modrm_byte, |
| 1340 | byte* modrm_start) { |
| 1341 | const char* mnem = "?"; |
| 1342 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 1343 | switch (escape_opcode) { |
| 1344 | case 0xD9: switch (regop) { |
| 1345 | case 0: mnem = "fld_s"; break; |
| 1346 | case 3: mnem = "fstp_s"; break; |
| 1347 | case 7: mnem = "fstcw"; break; |
| 1348 | default: UnimplementedInstruction(); |
| 1349 | } |
| 1350 | break; |
| 1351 | |
| 1352 | case 0xDB: switch (regop) { |
| 1353 | case 0: mnem = "fild_s"; break; |
| 1354 | case 1: mnem = "fisttp_s"; break; |
| 1355 | case 2: mnem = "fist_s"; break; |
| 1356 | case 3: mnem = "fistp_s"; break; |
| 1357 | default: UnimplementedInstruction(); |
| 1358 | } |
| 1359 | break; |
| 1360 | |
| 1361 | case 0xDD: switch (regop) { |
| 1362 | case 0: mnem = "fld_d"; break; |
| 1363 | case 3: mnem = "fstp_d"; break; |
| 1364 | default: UnimplementedInstruction(); |
| 1365 | } |
| 1366 | break; |
| 1367 | |
| 1368 | case 0xDF: switch (regop) { |
| 1369 | case 5: mnem = "fild_d"; break; |
| 1370 | case 7: mnem = "fistp_d"; break; |
| 1371 | default: UnimplementedInstruction(); |
| 1372 | } |
| 1373 | break; |
| 1374 | |
| 1375 | default: UnimplementedInstruction(); |
| 1376 | } |
| 1377 | AppendToBuffer("%s ", mnem); |
| 1378 | int count = PrintRightOperand(modrm_start); |
| 1379 | return count + 1; |
| 1380 | } |
| 1381 | |
| 1382 | int DisassemblerX64::RegisterFPUInstruction(int escape_opcode, |
| 1383 | byte modrm_byte) { |
| 1384 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 1385 | const char* mnem = "?"; |
| 1386 | |
| 1387 | switch (escape_opcode) { |
| 1388 | case 0xD8: |
| 1389 | UnimplementedInstruction(); |
| 1390 | break; |
| 1391 | |
| 1392 | case 0xD9: |
| 1393 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1394 | case 0xC0: |
| 1395 | mnem = "fld"; |
| 1396 | has_register = true; |
| 1397 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1398 | case 0xC8: |
| 1399 | mnem = "fxch"; |
| 1400 | has_register = true; |
| 1401 | break; |
| 1402 | default: |
| 1403 | switch (modrm_byte) { |
| 1404 | case 0xE0: mnem = "fchs"; break; |
| 1405 | case 0xE1: mnem = "fabs"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1406 | case 0xE3: mnem = "fninit"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1407 | case 0xE4: mnem = "ftst"; break; |
| 1408 | case 0xE8: mnem = "fld1"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1409 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1410 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1411 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1412 | case 0xF0: mnem = "f2xm1"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1413 | case 0xF1: mnem = "fyl2x"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1414 | case 0xF2: mnem = "fptan"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1415 | case 0xF5: mnem = "fprem1"; break; |
| 1416 | case 0xF7: mnem = "fincstp"; break; |
| 1417 | case 0xF8: mnem = "fprem"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1418 | case 0xFC: mnem = "frndint"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1419 | case 0xFD: mnem = "fscale"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1420 | case 0xFE: mnem = "fsin"; break; |
| 1421 | case 0xFF: mnem = "fcos"; break; |
| 1422 | default: UnimplementedInstruction(); |
| 1423 | } |
| 1424 | } |
| 1425 | break; |
| 1426 | |
| 1427 | case 0xDA: |
| 1428 | if (modrm_byte == 0xE9) { |
| 1429 | mnem = "fucompp"; |
| 1430 | } else { |
| 1431 | UnimplementedInstruction(); |
| 1432 | } |
| 1433 | break; |
| 1434 | |
| 1435 | case 0xDB: |
| 1436 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 1437 | mnem = "fucomi"; |
| 1438 | has_register = true; |
| 1439 | } else if (modrm_byte == 0xE2) { |
| 1440 | mnem = "fclex"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1441 | } else if (modrm_byte == 0xE3) { |
| 1442 | mnem = "fninit"; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1443 | } else { |
| 1444 | UnimplementedInstruction(); |
| 1445 | } |
| 1446 | break; |
| 1447 | |
| 1448 | case 0xDC: |
| 1449 | has_register = true; |
| 1450 | switch (modrm_byte & 0xF8) { |
| 1451 | case 0xC0: mnem = "fadd"; break; |
| 1452 | case 0xE8: mnem = "fsub"; break; |
| 1453 | case 0xC8: mnem = "fmul"; break; |
| 1454 | case 0xF8: mnem = "fdiv"; break; |
| 1455 | default: UnimplementedInstruction(); |
| 1456 | } |
| 1457 | break; |
| 1458 | |
| 1459 | case 0xDD: |
| 1460 | has_register = true; |
| 1461 | switch (modrm_byte & 0xF8) { |
| 1462 | case 0xC0: mnem = "ffree"; break; |
| 1463 | case 0xD8: mnem = "fstp"; break; |
| 1464 | default: UnimplementedInstruction(); |
| 1465 | } |
| 1466 | break; |
| 1467 | |
| 1468 | case 0xDE: |
| 1469 | if (modrm_byte == 0xD9) { |
| 1470 | mnem = "fcompp"; |
| 1471 | } else { |
| 1472 | has_register = true; |
| 1473 | switch (modrm_byte & 0xF8) { |
| 1474 | case 0xC0: mnem = "faddp"; break; |
| 1475 | case 0xE8: mnem = "fsubp"; break; |
| 1476 | case 0xC8: mnem = "fmulp"; break; |
| 1477 | case 0xF8: mnem = "fdivp"; break; |
| 1478 | default: UnimplementedInstruction(); |
| 1479 | } |
| 1480 | } |
| 1481 | break; |
| 1482 | |
| 1483 | case 0xDF: |
| 1484 | if (modrm_byte == 0xE0) { |
| 1485 | mnem = "fnstsw_ax"; |
| 1486 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 1487 | mnem = "fucomip"; |
| 1488 | has_register = true; |
| 1489 | } |
| 1490 | break; |
| 1491 | |
| 1492 | default: UnimplementedInstruction(); |
| 1493 | } |
| 1494 | |
| 1495 | if (has_register) { |
| 1496 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 1497 | } else { |
| 1498 | AppendToBuffer("%s", mnem); |
| 1499 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1500 | return 2; |
| 1501 | } |
| 1502 | |
| 1503 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1504 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1505 | // Handle all two-byte opcodes, which start with 0x0F. |
| 1506 | // These instructions may be affected by an 0x66, 0xF2, or 0xF3 prefix. |
| 1507 | // We do not use any three-byte opcodes, which start with 0x0F38 or 0x0F3A. |
| 1508 | int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) { |
| 1509 | byte opcode = *(data + 1); |
| 1510 | byte* current = data + 2; |
| 1511 | // At return, "current" points to the start of the next instruction. |
| 1512 | const char* mnemonic = TwoByteMnemonic(opcode); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1513 | if (operand_size_ == 0x66) { |
| 1514 | // 0x66 0x0F prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1515 | int mod, regop, rm; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1516 | if (opcode == 0x38) { |
| 1517 | byte third_byte = *current; |
| 1518 | current = data + 3; |
| 1519 | if (third_byte == 0x40) { |
| 1520 | // pmulld xmm, xmm/m128 |
| 1521 | get_modrm(*current, &mod, ®op, &rm); |
| 1522 | AppendToBuffer("pmulld %s,", NameOfXMMRegister(regop)); |
| 1523 | current += PrintRightXMMOperand(current); |
| 1524 | } |
| 1525 | } else if (opcode == 0x3A) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1526 | byte third_byte = *current; |
| 1527 | current = data + 3; |
| 1528 | if (third_byte == 0x17) { |
| 1529 | get_modrm(*current, &mod, ®op, &rm); |
| 1530 | AppendToBuffer("extractps "); // reg/m32, xmm, imm8 |
| 1531 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1532 | AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1533 | current += 1; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1534 | } else if (third_byte == 0x0a) { |
| 1535 | get_modrm(*current, &mod, ®op, &rm); |
| 1536 | AppendToBuffer("roundss %s,", NameOfXMMRegister(regop)); |
| 1537 | current += PrintRightXMMOperand(current); |
| 1538 | AppendToBuffer(",0x%x", (*current) & 3); |
| 1539 | current += 1; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1540 | } else if (third_byte == 0x0b) { |
| 1541 | get_modrm(*current, &mod, ®op, &rm); |
| 1542 | // roundsd xmm, xmm/m64, imm8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1543 | AppendToBuffer("roundsd %s,", NameOfXMMRegister(regop)); |
| 1544 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1545 | AppendToBuffer(",0x%x", (*current) & 3); |
| 1546 | current += 1; |
| 1547 | } else if (third_byte == 0x16) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1548 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1549 | AppendToBuffer("pextrd "); // reg/m32, xmm, imm8 |
| 1550 | current += PrintRightOperand(current); |
| 1551 | AppendToBuffer(",%s,%d", NameOfXMMRegister(regop), (*current) & 3); |
| 1552 | current += 1; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1553 | } else if (third_byte == 0x21) { |
| 1554 | get_modrm(*current, &mod, ®op, &rm); |
| 1555 | // insertps xmm, xmm/m32, imm8 |
| 1556 | AppendToBuffer("insertps %s,", NameOfXMMRegister(regop)); |
| 1557 | current += PrintRightXMMOperand(current); |
| 1558 | AppendToBuffer(",0x%x", (*current) & 3); |
| 1559 | current += 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1560 | } else if (third_byte == 0x22) { |
| 1561 | get_modrm(*current, &mod, ®op, &rm); |
| 1562 | AppendToBuffer("pinsrd "); // xmm, reg/m32, imm8 |
| 1563 | AppendToBuffer(" %s,", NameOfXMMRegister(regop)); |
| 1564 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1565 | AppendToBuffer(",%d", (*current) & 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1566 | current += 1; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1567 | } else { |
| 1568 | UnimplementedInstruction(); |
| 1569 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1570 | } else { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1571 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1572 | if (opcode == 0x1f) { |
| 1573 | current++; |
| 1574 | if (rm == 4) { // SIB byte present. |
| 1575 | current++; |
| 1576 | } |
| 1577 | if (mod == 1) { // Byte displacement. |
| 1578 | current += 1; |
| 1579 | } else if (mod == 2) { // 32-bit displacement. |
| 1580 | current += 4; |
| 1581 | } // else no immediate displacement. |
| 1582 | AppendToBuffer("nop"); |
| 1583 | } else if (opcode == 0x28) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1584 | AppendToBuffer("movapd %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1585 | current += PrintRightXMMOperand(current); |
| 1586 | } else if (opcode == 0x29) { |
| 1587 | AppendToBuffer("movapd "); |
| 1588 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1589 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1590 | } else if (opcode == 0x6E) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1591 | AppendToBuffer("mov%c %s,", |
| 1592 | rex_w() ? 'q' : 'd', |
| 1593 | NameOfXMMRegister(regop)); |
| 1594 | current += PrintRightOperand(current); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1595 | } else if (opcode == 0x6F) { |
| 1596 | AppendToBuffer("movdqa %s,", |
| 1597 | NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1598 | current += PrintRightXMMOperand(current); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1599 | } else if (opcode == 0x7E) { |
Ben Murdoch | bb769b2 | 2010-08-11 14:56:33 +0100 | [diff] [blame] | 1600 | AppendToBuffer("mov%c ", |
| 1601 | rex_w() ? 'q' : 'd'); |
| 1602 | current += PrintRightOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1603 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1604 | } else if (opcode == 0x7F) { |
| 1605 | AppendToBuffer("movdqa "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1606 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1607 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1608 | } else if (opcode == 0xD6) { |
| 1609 | AppendToBuffer("movq "); |
| 1610 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1611 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1612 | } else if (opcode == 0x50) { |
| 1613 | AppendToBuffer("movmskpd %s,", NameOfCPURegister(regop)); |
| 1614 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1615 | } else if (opcode == 0x70) { |
| 1616 | AppendToBuffer("pshufd %s,", NameOfXMMRegister(regop)); |
| 1617 | current += PrintRightXMMOperand(current); |
| 1618 | AppendToBuffer(",0x%x", *current); |
| 1619 | current += 1; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1620 | } else if (opcode == 0x72) { |
| 1621 | current += 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1622 | AppendToBuffer("%s %s,%d", (regop == 6) ? "pslld" : "psrld", |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1623 | NameOfXMMRegister(rm), *current & 0x7f); |
| 1624 | current += 1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1625 | } else if (opcode == 0x73) { |
| 1626 | current += 1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1627 | AppendToBuffer("%s %s,%d", (regop == 6) ? "psllq" : "psrlq", |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1628 | NameOfXMMRegister(rm), *current & 0x7f); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1629 | current += 1; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1630 | } else if (opcode == 0xB1) { |
| 1631 | current += PrintOperands("cmpxchg", OPER_REG_OP_ORDER, current); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1632 | } else { |
| 1633 | const char* mnemonic = "?"; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1634 | if (opcode == 0x54) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1635 | mnemonic = "andpd"; |
| 1636 | } else if (opcode == 0x56) { |
| 1637 | mnemonic = "orpd"; |
| 1638 | } else if (opcode == 0x57) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1639 | mnemonic = "xorpd"; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1640 | } else if (opcode == 0x5B) { |
| 1641 | mnemonic = "cvtps2dq"; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1642 | } else if (opcode == 0x2E) { |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1643 | mnemonic = "ucomisd"; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1644 | } else if (opcode == 0x2F) { |
| 1645 | mnemonic = "comisd"; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1646 | } else if (opcode == 0x76) { |
| 1647 | mnemonic = "pcmpeqd"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1648 | } else if (opcode == 0x62) { |
| 1649 | mnemonic = "punpckldq"; |
| 1650 | } else if (opcode == 0x6A) { |
| 1651 | mnemonic = "punpckhdq"; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1652 | } else if (opcode == 0xF4) { |
| 1653 | mnemonic = "pmuludq"; |
| 1654 | } else if (opcode == 0xFA) { |
| 1655 | mnemonic = "psubd"; |
| 1656 | } else if (opcode == 0xFE) { |
| 1657 | mnemonic = "paddd"; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1658 | } else { |
| 1659 | UnimplementedInstruction(); |
| 1660 | } |
| 1661 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1662 | current += PrintRightXMMOperand(current); |
| 1663 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1664 | } |
| 1665 | } else if (group_1_prefix_ == 0xF2) { |
| 1666 | // Beginning of instructions with prefix 0xF2. |
| 1667 | |
| 1668 | if (opcode == 0x11 || opcode == 0x10) { |
| 1669 | // MOVSD: Move scalar double-precision fp to/from/between XMM registers. |
| 1670 | AppendToBuffer("movsd "); |
| 1671 | int mod, regop, rm; |
| 1672 | get_modrm(*current, &mod, ®op, &rm); |
| 1673 | if (opcode == 0x11) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1674 | current += PrintRightXMMOperand(current); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1675 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1676 | } else { |
| 1677 | AppendToBuffer("%s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1678 | current += PrintRightXMMOperand(current); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1679 | } |
| 1680 | } else if (opcode == 0x2A) { |
| 1681 | // CVTSI2SD: integer to XMM double conversion. |
| 1682 | int mod, regop, rm; |
| 1683 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1684 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1685 | current += PrintRightOperand(current); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1686 | } else if (opcode == 0x2C) { |
| 1687 | // CVTTSD2SI: |
| 1688 | // Convert with truncation scalar double-precision FP to integer. |
| 1689 | int mod, regop, rm; |
| 1690 | get_modrm(*current, &mod, ®op, &rm); |
| 1691 | AppendToBuffer("cvttsd2si%c %s,", |
| 1692 | operand_size_code(), NameOfCPURegister(regop)); |
| 1693 | current += PrintRightXMMOperand(current); |
| 1694 | } else if (opcode == 0x2D) { |
| 1695 | // CVTSD2SI: Convert scalar double-precision FP to integer. |
| 1696 | int mod, regop, rm; |
| 1697 | get_modrm(*current, &mod, ®op, &rm); |
| 1698 | AppendToBuffer("cvtsd2si%c %s,", |
| 1699 | operand_size_code(), NameOfCPURegister(regop)); |
| 1700 | current += PrintRightXMMOperand(current); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1701 | } else if ((opcode & 0xF8) == 0x58 || opcode == 0x51) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1702 | // XMM arithmetic. Mnemonic was retrieved at the start of this function. |
| 1703 | int mod, regop, rm; |
| 1704 | get_modrm(*current, &mod, ®op, &rm); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1705 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1706 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1707 | } else if (opcode == 0xC2) { |
| 1708 | // Intel manual 2A, Table 3-18. |
| 1709 | int mod, regop, rm; |
| 1710 | get_modrm(*current, &mod, ®op, &rm); |
| 1711 | const char* const pseudo_op[] = { |
| 1712 | "cmpeqsd", |
| 1713 | "cmpltsd", |
| 1714 | "cmplesd", |
| 1715 | "cmpunordsd", |
| 1716 | "cmpneqsd", |
| 1717 | "cmpnltsd", |
| 1718 | "cmpnlesd", |
| 1719 | "cmpordsd" |
| 1720 | }; |
| 1721 | AppendToBuffer("%s %s,%s", |
| 1722 | pseudo_op[current[1]], |
| 1723 | NameOfXMMRegister(regop), |
| 1724 | NameOfXMMRegister(rm)); |
| 1725 | current += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1726 | } else { |
| 1727 | UnimplementedInstruction(); |
| 1728 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1729 | } else if (group_1_prefix_ == 0xF3) { |
| 1730 | // Instructions with prefix 0xF3. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1731 | if (opcode == 0x11 || opcode == 0x10) { |
| 1732 | // MOVSS: Move scalar double-precision fp to/from/between XMM registers. |
| 1733 | AppendToBuffer("movss "); |
| 1734 | int mod, regop, rm; |
| 1735 | get_modrm(*current, &mod, ®op, &rm); |
| 1736 | if (opcode == 0x11) { |
| 1737 | current += PrintRightOperand(current); |
| 1738 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1739 | } else { |
| 1740 | AppendToBuffer("%s,", NameOfXMMRegister(regop)); |
| 1741 | current += PrintRightOperand(current); |
| 1742 | } |
| 1743 | } else if (opcode == 0x2A) { |
| 1744 | // CVTSI2SS: integer to XMM single conversion. |
| 1745 | int mod, regop, rm; |
| 1746 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1747 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1748 | current += PrintRightOperand(current); |
| 1749 | } else if (opcode == 0x2C) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1750 | // CVTTSS2SI: |
| 1751 | // Convert with truncation scalar single-precision FP to dword integer. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1752 | int mod, regop, rm; |
| 1753 | get_modrm(*current, &mod, ®op, &rm); |
| 1754 | AppendToBuffer("cvttss2si%c %s,", |
| 1755 | operand_size_code(), NameOfCPURegister(regop)); |
| 1756 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1757 | } else if (opcode == 0x7E) { |
| 1758 | int mod, regop, rm; |
| 1759 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1760 | AppendToBuffer("movq %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1761 | current += PrintRightXMMOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1762 | } else if ((opcode & 0xF8) == 0x58 || opcode == 0x51) { |
| 1763 | // XMM arithmetic. Mnemonic was retrieved at the start of this function. |
| 1764 | int mod, regop, rm; |
| 1765 | get_modrm(*current, &mod, ®op, &rm); |
| 1766 | AppendToBuffer("%s %s,", mnemonic, NameOfXMMRegister(regop)); |
| 1767 | current += PrintRightXMMOperand(current); |
| 1768 | } else if (opcode == 0xB8) { |
| 1769 | int mod, regop, rm; |
| 1770 | get_modrm(*current, &mod, ®op, &rm); |
| 1771 | AppendToBuffer("popcnt%c %s,", operand_size_code(), |
| 1772 | NameOfCPURegister(regop)); |
| 1773 | current += PrintRightOperand(current); |
| 1774 | } else if (opcode == 0xBC) { |
| 1775 | int mod, regop, rm; |
| 1776 | get_modrm(*current, &mod, ®op, &rm); |
| 1777 | AppendToBuffer("tzcnt%c %s,", operand_size_code(), |
| 1778 | NameOfCPURegister(regop)); |
| 1779 | current += PrintRightOperand(current); |
| 1780 | } else if (opcode == 0xBD) { |
| 1781 | int mod, regop, rm; |
| 1782 | get_modrm(*current, &mod, ®op, &rm); |
| 1783 | AppendToBuffer("lzcnt%c %s,", operand_size_code(), |
| 1784 | NameOfCPURegister(regop)); |
| 1785 | current += PrintRightOperand(current); |
| 1786 | } else if (opcode == 0xC2) { |
| 1787 | // Intel manual 2A, Table 3-18. |
| 1788 | int mod, regop, rm; |
| 1789 | get_modrm(*current, &mod, ®op, &rm); |
| 1790 | const char* const pseudo_op[] = {"cmpeqss", "cmpltss", "cmpless", |
| 1791 | "cmpunordss", "cmpneqss", "cmpnltss", |
| 1792 | "cmpnless", "cmpordss"}; |
| 1793 | AppendToBuffer("%s %s,%s", pseudo_op[current[1]], |
| 1794 | NameOfXMMRegister(regop), NameOfXMMRegister(rm)); |
| 1795 | current += 2; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1796 | } else { |
| 1797 | UnimplementedInstruction(); |
| 1798 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1799 | } else if (opcode == 0x10 || opcode == 0x11) { |
| 1800 | // movups xmm, xmm/m128 |
| 1801 | // movups xmm/m128, xmm |
| 1802 | int mod, regop, rm; |
| 1803 | get_modrm(*current, &mod, ®op, &rm); |
| 1804 | AppendToBuffer("movups "); |
| 1805 | if (opcode == 0x11) { |
| 1806 | current += PrintRightXMMOperand(current); |
| 1807 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1808 | } else { |
| 1809 | AppendToBuffer("%s,", NameOfXMMRegister(regop)); |
| 1810 | current += PrintRightXMMOperand(current); |
| 1811 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1812 | } else if (opcode == 0x1F) { |
| 1813 | // NOP |
| 1814 | int mod, regop, rm; |
| 1815 | get_modrm(*current, &mod, ®op, &rm); |
| 1816 | current++; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1817 | if (rm == 4) { // SIB byte present. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1818 | current++; |
| 1819 | } |
| 1820 | if (mod == 1) { // Byte displacement. |
| 1821 | current += 1; |
| 1822 | } else if (mod == 2) { // 32-bit displacement. |
| 1823 | current += 4; |
| 1824 | } // else no immediate displacement. |
| 1825 | AppendToBuffer("nop"); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1826 | |
| 1827 | } else if (opcode == 0x28) { |
| 1828 | // movaps xmm, xmm/m128 |
| 1829 | int mod, regop, rm; |
| 1830 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1831 | AppendToBuffer("movaps %s,", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1832 | current += PrintRightXMMOperand(current); |
| 1833 | |
| 1834 | } else if (opcode == 0x29) { |
| 1835 | // movaps xmm/m128, xmm |
| 1836 | int mod, regop, rm; |
| 1837 | get_modrm(*current, &mod, ®op, &rm); |
| 1838 | AppendToBuffer("movaps "); |
| 1839 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1840 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1841 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1842 | } else if (opcode == 0x2e) { |
| 1843 | int mod, regop, rm; |
| 1844 | get_modrm(*current, &mod, ®op, &rm); |
| 1845 | AppendToBuffer("ucomiss %s,", NameOfXMMRegister(regop)); |
| 1846 | current += PrintRightXMMOperand(current); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1847 | } else if (opcode == 0xA2) { |
| 1848 | // CPUID |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1849 | AppendToBuffer("%s", mnemonic); |
| 1850 | |
| 1851 | } else if ((opcode & 0xF0) == 0x40) { |
| 1852 | // CMOVcc: conditional move. |
| 1853 | int condition = opcode & 0x0F; |
| 1854 | const InstructionDesc& idesc = cmov_instructions[condition]; |
| 1855 | byte_size_operand_ = idesc.byte_size_operation; |
| 1856 | current += PrintOperands(idesc.mnem, idesc.op_order_, current); |
| 1857 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1858 | } else if (opcode >= 0x51 && opcode <= 0x5F) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1859 | const char* const pseudo_op[] = { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1860 | "sqrtps", "rsqrtps", "rcpps", "andps", "andnps", |
| 1861 | "orps", "xorps", "addps", "mulps", "cvtps2pd", |
| 1862 | "cvtdq2ps", "subps", "minps", "divps", "maxps", |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1863 | }; |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1864 | int mod, regop, rm; |
| 1865 | get_modrm(*current, &mod, ®op, &rm); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1866 | AppendToBuffer("%s %s,", pseudo_op[opcode - 0x51], |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1867 | NameOfXMMRegister(regop)); |
| 1868 | current += PrintRightXMMOperand(current); |
| 1869 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1870 | } else if (opcode == 0xC2) { |
| 1871 | // cmpps xmm, xmm/m128, imm8 |
| 1872 | int mod, regop, rm; |
| 1873 | get_modrm(*current, &mod, ®op, &rm); |
| 1874 | const char* const pseudo_op[] = {"cmpeqps", "cmpltps", "cmpleps", |
| 1875 | "cmpunordps", "cmpneqps", "cmpnltps", |
| 1876 | "cmpnleps", "cmpordps"}; |
| 1877 | AppendToBuffer("%s %s,%s", pseudo_op[current[1]], NameOfXMMRegister(regop), |
| 1878 | NameOfXMMRegister(rm)); |
| 1879 | current += 2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1880 | } else if (opcode == 0xC6) { |
| 1881 | // shufps xmm, xmm/m128, imm8 |
| 1882 | int mod, regop, rm; |
| 1883 | get_modrm(*current, &mod, ®op, &rm); |
| 1884 | AppendToBuffer("shufps %s, ", NameOfXMMRegister(regop)); |
| 1885 | current += PrintRightXMMOperand(current); |
| 1886 | AppendToBuffer(", %d", (*current) & 3); |
| 1887 | current += 1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1888 | } else if (opcode == 0x50) { |
| 1889 | // movmskps reg, xmm |
| 1890 | int mod, regop, rm; |
| 1891 | get_modrm(*current, &mod, ®op, &rm); |
| 1892 | AppendToBuffer("movmskps %s,", NameOfCPURegister(regop)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1893 | current += PrintRightXMMOperand(current); |
| 1894 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1895 | } else if ((opcode & 0xF0) == 0x80) { |
| 1896 | // Jcc: Conditional jump (branch). |
| 1897 | current = data + JumpConditional(data); |
| 1898 | |
| 1899 | } else if (opcode == 0xBE || opcode == 0xBF || opcode == 0xB6 || |
| 1900 | opcode == 0xB7 || opcode == 0xAF) { |
| 1901 | // Size-extending moves, IMUL. |
| 1902 | current += PrintOperands(mnemonic, REG_OPER_OP_ORDER, current); |
| 1903 | |
| 1904 | } else if ((opcode & 0xF0) == 0x90) { |
| 1905 | // SETcc: Set byte on condition. Needs pointer to beginning of instruction. |
| 1906 | current = data + SetCC(data); |
| 1907 | |
| 1908 | } else if (opcode == 0xAB || opcode == 0xA5 || opcode == 0xAD) { |
| 1909 | // SHLD, SHRD (double-precision shift), BTS (bit set). |
| 1910 | AppendToBuffer("%s ", mnemonic); |
| 1911 | int mod, regop, rm; |
| 1912 | get_modrm(*current, &mod, ®op, &rm); |
| 1913 | current += PrintRightOperand(current); |
| 1914 | if (opcode == 0xAB) { |
| 1915 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1916 | } else { |
| 1917 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
| 1918 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1919 | } else if (opcode == 0xB8 || opcode == 0xBC || opcode == 0xBD) { |
| 1920 | // POPCNT, CTZ, CLZ. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1921 | AppendToBuffer("%s%c ", mnemonic, operand_size_code()); |
| 1922 | int mod, regop, rm; |
| 1923 | get_modrm(*current, &mod, ®op, &rm); |
| 1924 | AppendToBuffer("%s,", NameOfCPURegister(regop)); |
| 1925 | current += PrintRightOperand(current); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1926 | } else if (opcode == 0x0B) { |
| 1927 | AppendToBuffer("ud2"); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1928 | } else if (opcode == 0xB0 || opcode == 0xB1) { |
| 1929 | // CMPXCHG. |
| 1930 | if (opcode == 0xB0) { |
| 1931 | byte_size_operand_ = true; |
| 1932 | } |
| 1933 | current += PrintOperands(mnemonic, OPER_REG_OP_ORDER, current); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1934 | } else { |
| 1935 | UnimplementedInstruction(); |
| 1936 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1937 | return static_cast<int>(current - data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1938 | } |
| 1939 | |
| 1940 | |
| 1941 | // Mnemonics for two-byte opcode instructions starting with 0x0F. |
| 1942 | // The argument is the second byte of the two-byte opcode. |
| 1943 | // Returns NULL if the instruction is not handled here. |
| 1944 | const char* DisassemblerX64::TwoByteMnemonic(byte opcode) { |
| 1945 | switch (opcode) { |
| 1946 | case 0x1F: |
| 1947 | return "nop"; |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame] | 1948 | case 0x2A: // F2/F3 prefix. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1949 | return (group_1_prefix_ == 0xF2) ? "cvtsi2sd" : "cvtsi2ss"; |
| 1950 | case 0x51: // F2/F3 prefix. |
| 1951 | return (group_1_prefix_ == 0xF2) ? "sqrtsd" : "sqrtss"; |
| 1952 | case 0x58: // F2/F3 prefix. |
| 1953 | return (group_1_prefix_ == 0xF2) ? "addsd" : "addss"; |
| 1954 | case 0x59: // F2/F3 prefix. |
| 1955 | return (group_1_prefix_ == 0xF2) ? "mulsd" : "mulss"; |
| 1956 | case 0x5A: // F2/F3 prefix. |
| 1957 | return (group_1_prefix_ == 0xF2) ? "cvtsd2ss" : "cvtss2sd"; |
| 1958 | case 0x5D: // F2/F3 prefix. |
| 1959 | return (group_1_prefix_ == 0xF2) ? "minsd" : "minss"; |
| 1960 | case 0x5C: // F2/F3 prefix. |
| 1961 | return (group_1_prefix_ == 0xF2) ? "subsd" : "subss"; |
| 1962 | case 0x5E: // F2/F3 prefix. |
| 1963 | return (group_1_prefix_ == 0xF2) ? "divsd" : "divss"; |
| 1964 | case 0x5F: // F2/F3 prefix. |
| 1965 | return (group_1_prefix_ == 0xF2) ? "maxsd" : "maxss"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1966 | case 0xA2: |
| 1967 | return "cpuid"; |
| 1968 | case 0xA5: |
| 1969 | return "shld"; |
| 1970 | case 0xAB: |
| 1971 | return "bts"; |
| 1972 | case 0xAD: |
| 1973 | return "shrd"; |
| 1974 | case 0xAF: |
| 1975 | return "imul"; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1976 | case 0xB0: |
| 1977 | case 0xB1: |
| 1978 | return "cmpxchg"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1979 | case 0xB6: |
| 1980 | return "movzxb"; |
| 1981 | case 0xB7: |
| 1982 | return "movzxw"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1983 | case 0xBC: |
| 1984 | return "bsf"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1985 | case 0xBD: |
| 1986 | return "bsr"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1987 | case 0xBE: |
| 1988 | return "movsxb"; |
| 1989 | case 0xBF: |
| 1990 | return "movsxw"; |
| 1991 | default: |
| 1992 | return NULL; |
| 1993 | } |
| 1994 | } |
| 1995 | |
| 1996 | |
| 1997 | // Disassembles the instruction at instr, and writes it into out_buffer. |
| 1998 | int DisassemblerX64::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 1999 | byte* instr) { |
| 2000 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 2001 | byte* data = instr; |
| 2002 | bool processed = true; // Will be set to false if the current instruction |
| 2003 | // is not in 'instructions' table. |
| 2004 | byte current; |
| 2005 | |
| 2006 | // Scan for prefixes. |
| 2007 | while (true) { |
| 2008 | current = *data; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2009 | if (current == OPERAND_SIZE_OVERRIDE_PREFIX) { // Group 3 prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2010 | operand_size_ = current; |
| 2011 | } else if ((current & 0xF0) == 0x40) { // REX prefix. |
| 2012 | setRex(current); |
| 2013 | if (rex_w()) AppendToBuffer("REX.W "); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2014 | } else if ((current & 0xFE) == 0xF2) { // Group 1 prefix (0xF2 or 0xF3). |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2015 | group_1_prefix_ = current; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2016 | } else if (current == LOCK_PREFIX) { |
| 2017 | AppendToBuffer("lock "); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2018 | } else if (current == VEX3_PREFIX) { |
| 2019 | vex_byte0_ = current; |
| 2020 | vex_byte1_ = *(data + 1); |
| 2021 | vex_byte2_ = *(data + 2); |
| 2022 | setRex(0x40 | (~(vex_byte1_ >> 5) & 7) | ((vex_byte2_ >> 4) & 8)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2023 | data += 3; |
| 2024 | break; // Vex is the last prefix. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2025 | } else if (current == VEX2_PREFIX) { |
| 2026 | vex_byte0_ = current; |
| 2027 | vex_byte1_ = *(data + 1); |
| 2028 | setRex(0x40 | (~(vex_byte1_ >> 5) & 4)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2029 | data += 2; |
| 2030 | break; // Vex is the last prefix. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2031 | } else { // Not a prefix - an opcode. |
| 2032 | break; |
| 2033 | } |
| 2034 | data++; |
| 2035 | } |
| 2036 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2037 | // Decode AVX instructions. |
| 2038 | if (vex_byte0_ != 0) { |
| 2039 | processed = true; |
| 2040 | data += AVXInstruction(data); |
| 2041 | } else { |
| 2042 | const InstructionDesc& idesc = instruction_table_->Get(current); |
| 2043 | byte_size_operand_ = idesc.byte_size_operation; |
| 2044 | switch (idesc.type) { |
| 2045 | case ZERO_OPERANDS_INSTR: |
| 2046 | if (current >= 0xA4 && current <= 0xA7) { |
| 2047 | // String move or compare operations. |
| 2048 | if (group_1_prefix_ == REP_PREFIX) { |
| 2049 | // REP. |
| 2050 | AppendToBuffer("rep "); |
| 2051 | } |
| 2052 | if (rex_w()) AppendToBuffer("REX.W "); |
| 2053 | AppendToBuffer("%s%c", idesc.mnem, operand_size_code()); |
| 2054 | } else { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2055 | AppendToBuffer("%s%c", idesc.mnem, operand_size_code()); |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2056 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2057 | data++; |
| 2058 | break; |
| 2059 | |
| 2060 | case TWO_OPERANDS_INSTR: |
| 2061 | data++; |
| 2062 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 2063 | break; |
| 2064 | |
| 2065 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 2066 | data += JumpConditionalShort(data); |
| 2067 | break; |
| 2068 | |
| 2069 | case REGISTER_INSTR: |
| 2070 | AppendToBuffer("%s%c %s", idesc.mnem, operand_size_code(), |
| 2071 | NameOfCPURegister(base_reg(current & 0x07))); |
| 2072 | data++; |
| 2073 | break; |
| 2074 | case PUSHPOP_INSTR: |
| 2075 | AppendToBuffer("%s %s", idesc.mnem, |
| 2076 | NameOfCPURegister(base_reg(current & 0x07))); |
| 2077 | data++; |
| 2078 | break; |
| 2079 | case MOVE_REG_INSTR: { |
| 2080 | byte* addr = NULL; |
| 2081 | switch (operand_size()) { |
| 2082 | case OPERAND_WORD_SIZE: |
| 2083 | addr = |
| 2084 | reinterpret_cast<byte*>(*reinterpret_cast<int16_t*>(data + 1)); |
| 2085 | data += 3; |
| 2086 | break; |
| 2087 | case OPERAND_DOUBLEWORD_SIZE: |
| 2088 | addr = |
| 2089 | reinterpret_cast<byte*>(*reinterpret_cast<uint32_t*>(data + 1)); |
| 2090 | data += 5; |
| 2091 | break; |
| 2092 | case OPERAND_QUADWORD_SIZE: |
| 2093 | addr = |
| 2094 | reinterpret_cast<byte*>(*reinterpret_cast<int64_t*>(data + 1)); |
| 2095 | data += 9; |
| 2096 | break; |
| 2097 | default: |
| 2098 | UNREACHABLE(); |
| 2099 | } |
| 2100 | AppendToBuffer("mov%c %s,%s", operand_size_code(), |
| 2101 | NameOfCPURegister(base_reg(current & 0x07)), |
| 2102 | NameOfAddress(addr)); |
| 2103 | break; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 2104 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2105 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2106 | case CALL_JUMP_INSTR: { |
| 2107 | byte* addr = data + *reinterpret_cast<int32_t*>(data + 1) + 5; |
| 2108 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 2109 | data += 5; |
| 2110 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2111 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2112 | |
| 2113 | case SHORT_IMMEDIATE_INSTR: { |
| 2114 | byte* addr = |
| 2115 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 2116 | AppendToBuffer("%s rax,%s", idesc.mnem, NameOfAddress(addr)); |
| 2117 | data += 5; |
| 2118 | break; |
| 2119 | } |
| 2120 | |
| 2121 | case NO_INSTR: |
| 2122 | processed = false; |
| 2123 | break; |
| 2124 | |
| 2125 | default: |
| 2126 | UNIMPLEMENTED(); // This type is not implemented. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2127 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2128 | } |
| 2129 | |
| 2130 | // The first byte didn't match any of the simple opcodes, so we |
| 2131 | // need to do special processing on it. |
| 2132 | if (!processed) { |
| 2133 | switch (*data) { |
| 2134 | case 0xC2: |
| 2135 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data + 1)); |
| 2136 | data += 3; |
| 2137 | break; |
| 2138 | |
| 2139 | case 0x69: // fall through |
| 2140 | case 0x6B: { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2141 | int count = 1; |
| 2142 | count += PrintOperands("imul", REG_OPER_OP_ORDER, data + count); |
| 2143 | AppendToBuffer(",0x"); |
| 2144 | if (*data == 0x69) { |
| 2145 | count += PrintImmediate(data + count, operand_size()); |
| 2146 | } else { |
| 2147 | count += PrintImmediate(data + count, OPERAND_BYTE_SIZE); |
| 2148 | } |
| 2149 | data += count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2150 | break; |
| 2151 | } |
| 2152 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2153 | case 0x81: // fall through |
| 2154 | case 0x83: // 0x81 with sign extension bit set |
| 2155 | data += PrintImmediateOp(data); |
| 2156 | break; |
| 2157 | |
| 2158 | case 0x0F: |
| 2159 | data += TwoByteOpcodeInstruction(data); |
| 2160 | break; |
| 2161 | |
| 2162 | case 0x8F: { |
| 2163 | data++; |
| 2164 | int mod, regop, rm; |
| 2165 | get_modrm(*data, &mod, ®op, &rm); |
| 2166 | if (regop == 0) { |
| 2167 | AppendToBuffer("pop "); |
| 2168 | data += PrintRightOperand(data); |
| 2169 | } |
| 2170 | } |
| 2171 | break; |
| 2172 | |
| 2173 | case 0xFF: { |
| 2174 | data++; |
| 2175 | int mod, regop, rm; |
| 2176 | get_modrm(*data, &mod, ®op, &rm); |
| 2177 | const char* mnem = NULL; |
| 2178 | switch (regop) { |
| 2179 | case 0: |
| 2180 | mnem = "inc"; |
| 2181 | break; |
| 2182 | case 1: |
| 2183 | mnem = "dec"; |
| 2184 | break; |
| 2185 | case 2: |
| 2186 | mnem = "call"; |
| 2187 | break; |
| 2188 | case 4: |
| 2189 | mnem = "jmp"; |
| 2190 | break; |
| 2191 | case 6: |
| 2192 | mnem = "push"; |
| 2193 | break; |
| 2194 | default: |
| 2195 | mnem = "???"; |
| 2196 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2197 | if (regop <= 1) { |
| 2198 | AppendToBuffer("%s%c ", mnem, operand_size_code()); |
| 2199 | } else { |
| 2200 | AppendToBuffer("%s ", mnem); |
| 2201 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2202 | data += PrintRightOperand(data); |
| 2203 | } |
| 2204 | break; |
| 2205 | |
| 2206 | case 0xC7: // imm32, fall through |
| 2207 | case 0xC6: // imm8 |
| 2208 | { |
| 2209 | bool is_byte = *data == 0xC6; |
| 2210 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2211 | if (is_byte) { |
| 2212 | AppendToBuffer("movb "); |
| 2213 | data += PrintRightByteOperand(data); |
| 2214 | int32_t imm = *data; |
| 2215 | AppendToBuffer(",0x%x", imm); |
| 2216 | data++; |
| 2217 | } else { |
| 2218 | AppendToBuffer("mov%c ", operand_size_code()); |
| 2219 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2220 | if (operand_size() == OPERAND_WORD_SIZE) { |
| 2221 | int16_t imm = *reinterpret_cast<int16_t*>(data); |
| 2222 | AppendToBuffer(",0x%x", imm); |
| 2223 | data += 2; |
| 2224 | } else { |
| 2225 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 2226 | AppendToBuffer(",0x%x", imm); |
| 2227 | data += 4; |
| 2228 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2229 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2230 | } |
| 2231 | break; |
| 2232 | |
| 2233 | case 0x80: { |
| 2234 | data++; |
| 2235 | AppendToBuffer("cmpb "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2236 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2237 | int32_t imm = *data; |
| 2238 | AppendToBuffer(",0x%x", imm); |
| 2239 | data++; |
| 2240 | } |
| 2241 | break; |
| 2242 | |
| 2243 | case 0x88: // 8bit, fall through |
| 2244 | case 0x89: // 32bit |
| 2245 | { |
| 2246 | bool is_byte = *data == 0x88; |
| 2247 | int mod, regop, rm; |
| 2248 | data++; |
| 2249 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2250 | if (is_byte) { |
| 2251 | AppendToBuffer("movb "); |
| 2252 | data += PrintRightByteOperand(data); |
| 2253 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 2254 | } else { |
| 2255 | AppendToBuffer("mov%c ", operand_size_code()); |
| 2256 | data += PrintRightOperand(data); |
| 2257 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 2258 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2259 | } |
| 2260 | break; |
| 2261 | |
| 2262 | case 0x90: |
| 2263 | case 0x91: |
| 2264 | case 0x92: |
| 2265 | case 0x93: |
| 2266 | case 0x94: |
| 2267 | case 0x95: |
| 2268 | case 0x96: |
| 2269 | case 0x97: { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2270 | int reg = (*data & 0x7) | (rex_b() ? 8 : 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2271 | if (reg == 0) { |
| 2272 | AppendToBuffer("nop"); // Common name for xchg rax,rax. |
| 2273 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2274 | AppendToBuffer("xchg%c rax,%s", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2275 | operand_size_code(), |
| 2276 | NameOfCPURegister(reg)); |
| 2277 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2278 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2279 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2280 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2281 | case 0xB0: |
| 2282 | case 0xB1: |
| 2283 | case 0xB2: |
| 2284 | case 0xB3: |
| 2285 | case 0xB4: |
| 2286 | case 0xB5: |
| 2287 | case 0xB6: |
| 2288 | case 0xB7: |
| 2289 | case 0xB8: |
| 2290 | case 0xB9: |
| 2291 | case 0xBA: |
| 2292 | case 0xBB: |
| 2293 | case 0xBC: |
| 2294 | case 0xBD: |
| 2295 | case 0xBE: |
| 2296 | case 0xBF: { |
| 2297 | // mov reg8,imm8 or mov reg32,imm32 |
| 2298 | byte opcode = *data; |
| 2299 | data++; |
| 2300 | bool is_32bit = (opcode >= 0xB8); |
| 2301 | int reg = (opcode & 0x7) | (rex_b() ? 8 : 0); |
| 2302 | if (is_32bit) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2303 | AppendToBuffer("mov%c %s,", |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2304 | operand_size_code(), |
| 2305 | NameOfCPURegister(reg)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2306 | data += PrintImmediate(data, OPERAND_DOUBLEWORD_SIZE); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2307 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2308 | AppendToBuffer("movb %s,", |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2309 | NameOfByteCPURegister(reg)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2310 | data += PrintImmediate(data, OPERAND_BYTE_SIZE); |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2311 | } |
| 2312 | break; |
| 2313 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2314 | case 0xFE: { |
| 2315 | data++; |
| 2316 | int mod, regop, rm; |
| 2317 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2318 | if (regop == 1) { |
| 2319 | AppendToBuffer("decb "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2320 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2321 | } else { |
| 2322 | UnimplementedInstruction(); |
| 2323 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2324 | break; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2325 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2326 | case 0x68: |
| 2327 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data + 1)); |
| 2328 | data += 5; |
| 2329 | break; |
| 2330 | |
| 2331 | case 0x6A: |
| 2332 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 2333 | data += 2; |
| 2334 | break; |
| 2335 | |
| 2336 | case 0xA1: // Fall through. |
| 2337 | case 0xA3: |
| 2338 | switch (operand_size()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2339 | case OPERAND_DOUBLEWORD_SIZE: { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2340 | const char* memory_location = NameOfAddress( |
| 2341 | reinterpret_cast<byte*>( |
| 2342 | *reinterpret_cast<int32_t*>(data + 1))); |
| 2343 | if (*data == 0xA1) { // Opcode 0xA1 |
| 2344 | AppendToBuffer("movzxlq rax,(%s)", memory_location); |
| 2345 | } else { // Opcode 0xA3 |
| 2346 | AppendToBuffer("movzxlq (%s),rax", memory_location); |
| 2347 | } |
| 2348 | data += 5; |
| 2349 | break; |
| 2350 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2351 | case OPERAND_QUADWORD_SIZE: { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2352 | // New x64 instruction mov rax,(imm_64). |
| 2353 | const char* memory_location = NameOfAddress( |
| 2354 | *reinterpret_cast<byte**>(data + 1)); |
| 2355 | if (*data == 0xA1) { // Opcode 0xA1 |
| 2356 | AppendToBuffer("movq rax,(%s)", memory_location); |
| 2357 | } else { // Opcode 0xA3 |
| 2358 | AppendToBuffer("movq (%s),rax", memory_location); |
| 2359 | } |
| 2360 | data += 9; |
| 2361 | break; |
| 2362 | } |
| 2363 | default: |
| 2364 | UnimplementedInstruction(); |
| 2365 | data += 2; |
| 2366 | } |
| 2367 | break; |
| 2368 | |
| 2369 | case 0xA8: |
| 2370 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data + 1)); |
| 2371 | data += 2; |
| 2372 | break; |
| 2373 | |
| 2374 | case 0xA9: { |
| 2375 | int64_t value = 0; |
| 2376 | switch (operand_size()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2377 | case OPERAND_WORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2378 | value = *reinterpret_cast<uint16_t*>(data + 1); |
| 2379 | data += 3; |
| 2380 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2381 | case OPERAND_DOUBLEWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2382 | value = *reinterpret_cast<uint32_t*>(data + 1); |
| 2383 | data += 5; |
| 2384 | break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2385 | case OPERAND_QUADWORD_SIZE: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2386 | value = *reinterpret_cast<int32_t*>(data + 1); |
| 2387 | data += 5; |
| 2388 | break; |
| 2389 | default: |
| 2390 | UNREACHABLE(); |
| 2391 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 2392 | AppendToBuffer("test%c rax,0x%" PRIx64, operand_size_code(), value); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2393 | break; |
| 2394 | } |
| 2395 | case 0xD1: // fall through |
| 2396 | case 0xD3: // fall through |
| 2397 | case 0xC1: |
| 2398 | data += ShiftInstruction(data); |
| 2399 | break; |
| 2400 | case 0xD0: // fall through |
| 2401 | case 0xD2: // fall through |
| 2402 | case 0xC0: |
| 2403 | byte_size_operand_ = true; |
| 2404 | data += ShiftInstruction(data); |
| 2405 | break; |
| 2406 | |
| 2407 | case 0xD9: // fall through |
| 2408 | case 0xDA: // fall through |
| 2409 | case 0xDB: // fall through |
| 2410 | case 0xDC: // fall through |
| 2411 | case 0xDD: // fall through |
| 2412 | case 0xDE: // fall through |
| 2413 | case 0xDF: |
| 2414 | data += FPUInstruction(data); |
| 2415 | break; |
| 2416 | |
| 2417 | case 0xEB: |
| 2418 | data += JumpShort(data); |
| 2419 | break; |
| 2420 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2421 | case 0xF6: |
| 2422 | byte_size_operand_ = true; // fall through |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2423 | case 0xF7: |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2424 | data += F6F7Instruction(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2425 | break; |
| 2426 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2427 | case 0x3C: |
| 2428 | AppendToBuffer("cmp al,0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 2429 | data +=2; |
| 2430 | break; |
| 2431 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2432 | default: |
| 2433 | UnimplementedInstruction(); |
| 2434 | data += 1; |
| 2435 | } |
| 2436 | } // !processed |
| 2437 | |
| 2438 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 2439 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 2440 | } |
| 2441 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2442 | int instr_len = static_cast<int>(data - instr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2443 | DCHECK(instr_len > 0); // Ensure progress. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2444 | |
| 2445 | int outp = 0; |
| 2446 | // Instruction bytes. |
| 2447 | for (byte* bp = instr; bp < data; bp++) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2448 | outp += v8::internal::SNPrintF(out_buffer + outp, "%02x", *bp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2449 | } |
| 2450 | for (int i = 6 - instr_len; i >= 0; i--) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2451 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2452 | } |
| 2453 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2454 | outp += v8::internal::SNPrintF(out_buffer + outp, " %s", |
| 2455 | tmp_buffer_.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2456 | return instr_len; |
| 2457 | } |
| 2458 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2459 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2460 | //------------------------------------------------------------------------------ |
| 2461 | |
| 2462 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2463 | static const char* const cpu_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2464 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 2465 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 2466 | }; |
| 2467 | |
| 2468 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2469 | static const char* const byte_cpu_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2470 | "al", "cl", "dl", "bl", "spl", "bpl", "sil", "dil", |
| 2471 | "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l" |
| 2472 | }; |
| 2473 | |
| 2474 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2475 | static const char* const xmm_regs[16] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2476 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7", |
| 2477 | "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15" |
| 2478 | }; |
| 2479 | |
| 2480 | |
| 2481 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2482 | v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2483 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2484 | } |
| 2485 | |
| 2486 | |
| 2487 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 2488 | return NameOfAddress(addr); |
| 2489 | } |
| 2490 | |
| 2491 | |
| 2492 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 2493 | if (0 <= reg && reg < 16) |
| 2494 | return cpu_regs[reg]; |
| 2495 | return "noreg"; |
| 2496 | } |
| 2497 | |
| 2498 | |
| 2499 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 2500 | if (0 <= reg && reg < 16) |
| 2501 | return byte_cpu_regs[reg]; |
| 2502 | return "noreg"; |
| 2503 | } |
| 2504 | |
| 2505 | |
| 2506 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 2507 | if (0 <= reg && reg < 16) |
| 2508 | return xmm_regs[reg]; |
| 2509 | return "noxmmreg"; |
| 2510 | } |
| 2511 | |
| 2512 | |
| 2513 | const char* NameConverter::NameInCode(byte* addr) const { |
| 2514 | // X64 does not embed debug strings at the moment. |
| 2515 | UNREACHABLE(); |
| 2516 | return ""; |
| 2517 | } |
| 2518 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2519 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2520 | //------------------------------------------------------------------------------ |
| 2521 | |
| 2522 | Disassembler::Disassembler(const NameConverter& converter) |
| 2523 | : converter_(converter) { } |
| 2524 | |
| 2525 | Disassembler::~Disassembler() { } |
| 2526 | |
| 2527 | |
| 2528 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 2529 | byte* instruction) { |
| 2530 | DisassemblerX64 d(converter_, CONTINUE_ON_UNIMPLEMENTED_OPCODE); |
| 2531 | return d.InstructionDecode(buffer, instruction); |
| 2532 | } |
| 2533 | |
| 2534 | |
| 2535 | // The X64 assembler does not use constant pools. |
| 2536 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { |
| 2537 | return -1; |
| 2538 | } |
| 2539 | |
| 2540 | |
| 2541 | void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 2542 | NameConverter converter; |
| 2543 | Disassembler d(converter); |
| 2544 | for (byte* pc = begin; pc < end;) { |
| 2545 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 2546 | buffer[0] = '\0'; |
| 2547 | byte* prev_pc = pc; |
| 2548 | pc += d.InstructionDecode(buffer, pc); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2549 | fprintf(f, "%p", static_cast<void*>(prev_pc)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2550 | fprintf(f, " "); |
| 2551 | |
| 2552 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 2553 | fprintf(f, "%02x", *bp); |
| 2554 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 2555 | 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] | 2556 | fprintf(f, " "); |
| 2557 | } |
| 2558 | fprintf(f, " %s\n", buffer.start()); |
| 2559 | } |
| 2560 | } |
| 2561 | |
| 2562 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2563 | |
| 2564 | #endif // V8_TARGET_ARCH_X64 |