Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [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_IA32 |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 10 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 11 | #include "src/disasm.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 12 | |
| 13 | namespace disasm { |
| 14 | |
| 15 | enum OperandOrder { |
| 16 | UNSET_OP_ORDER = 0, |
| 17 | REG_OPER_OP_ORDER, |
| 18 | OPER_REG_OP_ORDER |
| 19 | }; |
| 20 | |
| 21 | |
| 22 | //------------------------------------------------------------------ |
| 23 | // Tables |
| 24 | //------------------------------------------------------------------ |
| 25 | struct ByteMnemonic { |
| 26 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 27 | const char* mnem; |
| 28 | OperandOrder op_order_; |
| 29 | }; |
| 30 | |
| 31 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 32 | static const ByteMnemonic two_operands_instr[] = { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 33 | {0x01, "add", OPER_REG_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 34 | {0x03, "add", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | {0x09, "or", OPER_REG_OP_ORDER}, |
| 36 | {0x0B, "or", REG_OPER_OP_ORDER}, |
| 37 | {0x1B, "sbb", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 38 | {0x21, "and", OPER_REG_OP_ORDER}, |
| 39 | {0x23, "and", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 40 | {0x29, "sub", OPER_REG_OP_ORDER}, |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 41 | {0x2A, "subb", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 42 | {0x2B, "sub", REG_OPER_OP_ORDER}, |
Leon Clarke | eab96aa | 2010-01-27 16:31:12 +0000 | [diff] [blame] | 43 | {0x31, "xor", OPER_REG_OP_ORDER}, |
| 44 | {0x33, "xor", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 45 | {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 46 | {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 47 | {0x3B, "cmp", REG_OPER_OP_ORDER}, |
| 48 | {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 49 | {0x85, "test", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 50 | {0x87, "xchg", REG_OPER_OP_ORDER}, |
| 51 | {0x8A, "mov_b", REG_OPER_OP_ORDER}, |
| 52 | {0x8B, "mov", REG_OPER_OP_ORDER}, |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 53 | {0x8D, "lea", REG_OPER_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 54 | {-1, "", UNSET_OP_ORDER} |
| 55 | }; |
| 56 | |
| 57 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 58 | static const ByteMnemonic zero_operands_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 59 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 60 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 61 | {0x90, "nop", UNSET_OP_ORDER}, |
| 62 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 63 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 64 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 65 | {0x61, "popad", UNSET_OP_ORDER}, |
| 66 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 67 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 68 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 69 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 70 | {0x9B, "fwait", UNSET_OP_ORDER}, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 71 | {0xFC, "cld", UNSET_OP_ORDER}, |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 72 | {0xAB, "stos", UNSET_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 73 | {-1, "", UNSET_OP_ORDER} |
| 74 | }; |
| 75 | |
| 76 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 77 | static const ByteMnemonic call_jump_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 78 | {0xE8, "call", UNSET_OP_ORDER}, |
| 79 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 80 | {-1, "", UNSET_OP_ORDER} |
| 81 | }; |
| 82 | |
| 83 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 84 | static const ByteMnemonic short_immediate_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 85 | {0x05, "add", UNSET_OP_ORDER}, |
| 86 | {0x0D, "or", UNSET_OP_ORDER}, |
| 87 | {0x15, "adc", UNSET_OP_ORDER}, |
| 88 | {0x25, "and", UNSET_OP_ORDER}, |
| 89 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 90 | {0x35, "xor", UNSET_OP_ORDER}, |
| 91 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 92 | {-1, "", UNSET_OP_ORDER} |
| 93 | }; |
| 94 | |
| 95 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 96 | // Generally we don't want to generate these because they are subject to partial |
| 97 | // register stalls. They are included for completeness and because the cmp |
| 98 | // variant is used by the RecordWrite stub. Because it does not update the |
| 99 | // register it is not subject to partial register stalls. |
| 100 | static ByteMnemonic byte_immediate_instr[] = { |
| 101 | {0x0c, "or", UNSET_OP_ORDER}, |
| 102 | {0x24, "and", UNSET_OP_ORDER}, |
| 103 | {0x34, "xor", UNSET_OP_ORDER}, |
| 104 | {0x3c, "cmp", UNSET_OP_ORDER}, |
| 105 | {-1, "", UNSET_OP_ORDER} |
| 106 | }; |
| 107 | |
| 108 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 109 | static const char* const jump_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 110 | /*0*/ "jo", "jno", "jc", "jnc", |
| 111 | /*4*/ "jz", "jnz", "jna", "ja", |
| 112 | /*8*/ "js", "jns", "jpe", "jpo", |
| 113 | /*12*/ "jl", "jnl", "jng", "jg" |
| 114 | }; |
| 115 | |
| 116 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 117 | static const char* const set_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 118 | /*0*/ "seto", "setno", "setc", "setnc", |
| 119 | /*4*/ "setz", "setnz", "setna", "seta", |
| 120 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 121 | /*12*/ "setl", "setnl", "setng", "setg" |
| 122 | }; |
| 123 | |
| 124 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 125 | static const char* const conditional_move_mnem[] = { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 126 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 127 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 128 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 129 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 130 | }; |
| 131 | |
| 132 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 133 | enum InstructionType { |
| 134 | NO_INSTR, |
| 135 | ZERO_OPERANDS_INSTR, |
| 136 | TWO_OPERANDS_INSTR, |
| 137 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 138 | REGISTER_INSTR, |
| 139 | MOVE_REG_INSTR, |
| 140 | CALL_JUMP_INSTR, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 141 | SHORT_IMMEDIATE_INSTR, |
| 142 | BYTE_IMMEDIATE_INSTR |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | |
| 146 | struct InstructionDesc { |
| 147 | const char* mnem; |
| 148 | InstructionType type; |
| 149 | OperandOrder op_order_; |
| 150 | }; |
| 151 | |
| 152 | |
| 153 | class InstructionTable { |
| 154 | public: |
| 155 | InstructionTable(); |
| 156 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 157 | static InstructionTable* get_instance() { |
| 158 | static InstructionTable table; |
| 159 | return &table; |
| 160 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 161 | |
| 162 | private: |
| 163 | InstructionDesc instructions_[256]; |
| 164 | void Clear(); |
| 165 | void Init(); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 166 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 167 | void SetTableRange(InstructionType type, |
| 168 | byte start, |
| 169 | byte end, |
| 170 | const char* mnem); |
| 171 | void AddJumpConditionalShort(); |
| 172 | }; |
| 173 | |
| 174 | |
| 175 | InstructionTable::InstructionTable() { |
| 176 | Clear(); |
| 177 | Init(); |
| 178 | } |
| 179 | |
| 180 | |
| 181 | void InstructionTable::Clear() { |
| 182 | for (int i = 0; i < 256; i++) { |
| 183 | instructions_[i].mnem = ""; |
| 184 | instructions_[i].type = NO_INSTR; |
| 185 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 186 | } |
| 187 | } |
| 188 | |
| 189 | |
| 190 | void InstructionTable::Init() { |
| 191 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 192 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 193 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 194 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 195 | CopyTable(byte_immediate_instr, BYTE_IMMEDIATE_INSTR); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 196 | AddJumpConditionalShort(); |
| 197 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 198 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 199 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 200 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 201 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 202 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 203 | } |
| 204 | |
| 205 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 206 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 207 | InstructionType type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 208 | for (int i = 0; bm[i].b >= 0; i++) { |
| 209 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 210 | id->mnem = bm[i].mnem; |
| 211 | id->op_order_ = bm[i].op_order_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 212 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 213 | id->type = type; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | |
| 218 | void InstructionTable::SetTableRange(InstructionType type, |
| 219 | byte start, |
| 220 | byte end, |
| 221 | const char* mnem) { |
| 222 | for (byte b = start; b <= end; b++) { |
| 223 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 224 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 225 | id->mnem = mnem; |
| 226 | id->type = type; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | |
| 231 | void InstructionTable::AddJumpConditionalShort() { |
| 232 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 233 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 234 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 235 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 236 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 241 | // The IA32 disassembler implementation. |
| 242 | class DisassemblerIA32 { |
| 243 | public: |
| 244 | DisassemblerIA32(const NameConverter& converter, |
| 245 | bool abort_on_unimplemented = true) |
| 246 | : converter_(converter), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 247 | vex_byte0_(0), |
| 248 | vex_byte1_(0), |
| 249 | vex_byte2_(0), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 250 | instruction_table_(InstructionTable::get_instance()), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 251 | tmp_buffer_pos_(0), |
| 252 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 253 | tmp_buffer_[0] = '\0'; |
| 254 | } |
| 255 | |
| 256 | virtual ~DisassemblerIA32() {} |
| 257 | |
| 258 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 259 | // Returns the length of the disassembled machine instruction in bytes. |
| 260 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 261 | |
| 262 | private: |
| 263 | const NameConverter& converter_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 264 | byte vex_byte0_; // 0xc4 or 0xc5 |
| 265 | byte vex_byte1_; |
| 266 | byte vex_byte2_; // only for 3 bytes vex prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 267 | InstructionTable* instruction_table_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 268 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 269 | unsigned int tmp_buffer_pos_; |
| 270 | bool abort_on_unimplemented_; |
| 271 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 272 | enum { |
| 273 | eax = 0, |
| 274 | ecx = 1, |
| 275 | edx = 2, |
| 276 | ebx = 3, |
| 277 | esp = 4, |
| 278 | ebp = 5, |
| 279 | esi = 6, |
| 280 | edi = 7 |
| 281 | }; |
| 282 | |
| 283 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 284 | enum ShiftOpcodeExtension { |
| 285 | kROL = 0, |
| 286 | kROR = 1, |
| 287 | kRCL = 2, |
| 288 | kRCR = 3, |
| 289 | kSHL = 4, |
| 290 | KSHR = 5, |
| 291 | kSAR = 7 |
| 292 | }; |
| 293 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 294 | bool vex_128() { |
| 295 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 296 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 297 | return (checked & 4) != 1; |
| 298 | } |
| 299 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 300 | bool vex_none() { |
| 301 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 302 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 303 | return (checked & 3) == 0; |
| 304 | } |
| 305 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 306 | bool vex_66() { |
| 307 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 308 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 309 | return (checked & 3) == 1; |
| 310 | } |
| 311 | |
| 312 | bool vex_f3() { |
| 313 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 314 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 315 | return (checked & 3) == 2; |
| 316 | } |
| 317 | |
| 318 | bool vex_f2() { |
| 319 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 320 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 321 | return (checked & 3) == 3; |
| 322 | } |
| 323 | |
| 324 | bool vex_w() { |
| 325 | if (vex_byte0_ == 0xc5) return false; |
| 326 | return (vex_byte2_ & 0x80) != 0; |
| 327 | } |
| 328 | |
| 329 | bool vex_0f() { |
| 330 | if (vex_byte0_ == 0xc5) return true; |
| 331 | return (vex_byte1_ & 3) == 1; |
| 332 | } |
| 333 | |
| 334 | bool vex_0f38() { |
| 335 | if (vex_byte0_ == 0xc5) return false; |
| 336 | return (vex_byte1_ & 3) == 2; |
| 337 | } |
| 338 | |
| 339 | bool vex_0f3a() { |
| 340 | if (vex_byte0_ == 0xc5) return false; |
| 341 | return (vex_byte1_ & 3) == 3; |
| 342 | } |
| 343 | |
| 344 | int vex_vreg() { |
| 345 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 346 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 347 | return ~(checked >> 3) & 0xf; |
| 348 | } |
| 349 | |
| 350 | char float_size_code() { return "sd"[vex_w()]; } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 351 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 352 | const char* NameOfCPURegister(int reg) const { |
| 353 | return converter_.NameOfCPURegister(reg); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | const char* NameOfByteCPURegister(int reg) const { |
| 358 | return converter_.NameOfByteCPURegister(reg); |
| 359 | } |
| 360 | |
| 361 | |
| 362 | const char* NameOfXMMRegister(int reg) const { |
| 363 | return converter_.NameOfXMMRegister(reg); |
| 364 | } |
| 365 | |
| 366 | |
| 367 | const char* NameOfAddress(byte* addr) const { |
| 368 | return converter_.NameOfAddress(addr); |
| 369 | } |
| 370 | |
| 371 | |
| 372 | // Disassembler helper functions. |
| 373 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 374 | *mod = (data >> 6) & 3; |
| 375 | *regop = (data & 0x38) >> 3; |
| 376 | *rm = data & 7; |
| 377 | } |
| 378 | |
| 379 | |
| 380 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 381 | *scale = (data >> 6) & 3; |
| 382 | *index = (data >> 3) & 7; |
| 383 | *base = data & 7; |
| 384 | } |
| 385 | |
| 386 | typedef const char* (DisassemblerIA32::*RegisterNameMapping)(int reg) const; |
| 387 | |
| 388 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 389 | int PrintRightOperand(byte* modrmp); |
| 390 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 391 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 392 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 393 | int PrintImmediateOp(byte* data); |
| 394 | int F7Instruction(byte* data); |
| 395 | int D1D3C1Instruction(byte* data); |
| 396 | int JumpShort(byte* data); |
| 397 | int JumpConditional(byte* data, const char* comment); |
| 398 | int JumpConditionalShort(byte* data, const char* comment); |
| 399 | int SetCC(byte* data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 400 | int CMov(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 401 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 402 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 403 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 404 | int AVXInstruction(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 405 | void AppendToBuffer(const char* format, ...); |
| 406 | |
| 407 | |
| 408 | void UnimplementedInstruction() { |
| 409 | if (abort_on_unimplemented_) { |
| 410 | UNIMPLEMENTED(); |
| 411 | } else { |
| 412 | AppendToBuffer("'Unimplemented Instruction'"); |
| 413 | } |
| 414 | } |
| 415 | }; |
| 416 | |
| 417 | |
| 418 | void DisassemblerIA32::AppendToBuffer(const char* format, ...) { |
| 419 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 420 | va_list args; |
| 421 | va_start(args, format); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 422 | int result = v8::internal::VSNPrintF(buf, format, args); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 423 | va_end(args); |
| 424 | tmp_buffer_pos_ += result; |
| 425 | } |
| 426 | |
| 427 | int DisassemblerIA32::PrintRightOperandHelper( |
| 428 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 429 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 430 | int mod, regop, rm; |
| 431 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 432 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 433 | &DisassemblerIA32::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 434 | switch (mod) { |
| 435 | case 0: |
| 436 | if (rm == ebp) { |
| 437 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 438 | AppendToBuffer("[0x%x]", disp); |
| 439 | return 5; |
| 440 | } else if (rm == esp) { |
| 441 | byte sib = *(modrmp + 1); |
| 442 | int scale, index, base; |
| 443 | get_sib(sib, &scale, &index, &base); |
| 444 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 445 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 446 | return 2; |
| 447 | } else if (base == ebp) { |
| 448 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 449 | AppendToBuffer("[%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 450 | (this->*register_name)(index), |
| 451 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 452 | disp < 0 ? "-" : "+", |
| 453 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 454 | return 6; |
| 455 | } else if (index != esp && base != ebp) { |
| 456 | // [base+index*scale] |
| 457 | AppendToBuffer("[%s+%s*%d]", |
| 458 | (this->*register_name)(base), |
| 459 | (this->*register_name)(index), |
| 460 | 1 << scale); |
| 461 | return 2; |
| 462 | } else { |
| 463 | UnimplementedInstruction(); |
| 464 | return 1; |
| 465 | } |
| 466 | } else { |
| 467 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 468 | return 1; |
| 469 | } |
| 470 | break; |
| 471 | case 1: // fall through |
| 472 | case 2: |
| 473 | if (rm == esp) { |
| 474 | byte sib = *(modrmp + 1); |
| 475 | int scale, index, base; |
| 476 | get_sib(sib, &scale, &index, &base); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 477 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) |
| 478 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 479 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 480 | AppendToBuffer("[%s%s0x%x]", |
| 481 | (this->*register_name)(rm), |
| 482 | disp < 0 ? "-" : "+", |
| 483 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 484 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 485 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 486 | (this->*register_name)(base), |
| 487 | (this->*register_name)(index), |
| 488 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 489 | disp < 0 ? "-" : "+", |
| 490 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 491 | } |
| 492 | return mod == 2 ? 6 : 3; |
| 493 | } else { |
| 494 | // No sib. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 495 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) |
| 496 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 497 | AppendToBuffer("[%s%s0x%x]", |
| 498 | (this->*register_name)(rm), |
| 499 | disp < 0 ? "-" : "+", |
| 500 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 501 | return mod == 2 ? 5 : 2; |
| 502 | } |
| 503 | break; |
| 504 | case 3: |
| 505 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 506 | return 1; |
| 507 | default: |
| 508 | UnimplementedInstruction(); |
| 509 | return 1; |
| 510 | } |
| 511 | UNREACHABLE(); |
| 512 | } |
| 513 | |
| 514 | |
| 515 | int DisassemblerIA32::PrintRightOperand(byte* modrmp) { |
| 516 | return PrintRightOperandHelper(modrmp, &DisassemblerIA32::NameOfCPURegister); |
| 517 | } |
| 518 | |
| 519 | |
| 520 | int DisassemblerIA32::PrintRightByteOperand(byte* modrmp) { |
| 521 | return PrintRightOperandHelper(modrmp, |
| 522 | &DisassemblerIA32::NameOfByteCPURegister); |
| 523 | } |
| 524 | |
| 525 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 526 | int DisassemblerIA32::PrintRightXMMOperand(byte* modrmp) { |
| 527 | return PrintRightOperandHelper(modrmp, |
| 528 | &DisassemblerIA32::NameOfXMMRegister); |
| 529 | } |
| 530 | |
| 531 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 532 | // Returns number of bytes used including the current *data. |
| 533 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 534 | int DisassemblerIA32::PrintOperands(const char* mnem, |
| 535 | OperandOrder op_order, |
| 536 | byte* data) { |
| 537 | byte modrm = *data; |
| 538 | int mod, regop, rm; |
| 539 | get_modrm(modrm, &mod, ®op, &rm); |
| 540 | int advance = 0; |
| 541 | switch (op_order) { |
| 542 | case REG_OPER_OP_ORDER: { |
| 543 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 544 | advance = PrintRightOperand(data); |
| 545 | break; |
| 546 | } |
| 547 | case OPER_REG_OP_ORDER: { |
| 548 | AppendToBuffer("%s ", mnem); |
| 549 | advance = PrintRightOperand(data); |
| 550 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 551 | break; |
| 552 | } |
| 553 | default: |
| 554 | UNREACHABLE(); |
| 555 | break; |
| 556 | } |
| 557 | return advance; |
| 558 | } |
| 559 | |
| 560 | |
| 561 | // Returns number of bytes used by machine instruction, including *data byte. |
| 562 | // Writes immediate instructions to 'tmp_buffer_'. |
| 563 | int DisassemblerIA32::PrintImmediateOp(byte* data) { |
| 564 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 565 | byte modrm = *(data+1); |
| 566 | int mod, regop, rm; |
| 567 | get_modrm(modrm, &mod, ®op, &rm); |
| 568 | const char* mnem = "Imm???"; |
| 569 | switch (regop) { |
| 570 | case 0: mnem = "add"; break; |
| 571 | case 1: mnem = "or"; break; |
| 572 | case 2: mnem = "adc"; break; |
| 573 | case 4: mnem = "and"; break; |
| 574 | case 5: mnem = "sub"; break; |
| 575 | case 6: mnem = "xor"; break; |
| 576 | case 7: mnem = "cmp"; break; |
| 577 | default: UnimplementedInstruction(); |
| 578 | } |
| 579 | AppendToBuffer("%s ", mnem); |
| 580 | int count = PrintRightOperand(data+1); |
| 581 | if (sign_extension_bit) { |
| 582 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 583 | return 1 + count + 1 /*int8*/; |
| 584 | } else { |
| 585 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 586 | return 1 + count + 4 /*int32_t*/; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | |
| 591 | // Returns number of bytes used, including *data. |
| 592 | int DisassemblerIA32::F7Instruction(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 593 | DCHECK_EQ(0xF7, *data); |
| 594 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 595 | int mod, regop, rm; |
| 596 | get_modrm(modrm, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 597 | const char* mnem = NULL; |
| 598 | switch (regop) { |
| 599 | case 0: |
| 600 | mnem = "test"; |
| 601 | break; |
| 602 | case 2: |
| 603 | mnem = "not"; |
| 604 | break; |
| 605 | case 3: |
| 606 | mnem = "neg"; |
| 607 | break; |
| 608 | case 4: |
| 609 | mnem = "mul"; |
| 610 | break; |
| 611 | case 5: |
| 612 | mnem = "imul"; |
| 613 | break; |
| 614 | case 6: |
| 615 | mnem = "div"; |
| 616 | break; |
| 617 | case 7: |
| 618 | mnem = "idiv"; |
| 619 | break; |
| 620 | default: |
| 621 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 622 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 623 | AppendToBuffer("%s ", mnem); |
| 624 | int count = PrintRightOperand(data); |
| 625 | if (regop == 0) { |
| 626 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + count)); |
| 627 | count += 4; |
| 628 | } |
| 629 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 630 | } |
| 631 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 632 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 633 | int DisassemblerIA32::D1D3C1Instruction(byte* data) { |
| 634 | byte op = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 635 | DCHECK(op == 0xD1 || op == 0xD3 || op == 0xC1); |
| 636 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 637 | int mod, regop, rm; |
| 638 | get_modrm(modrm, &mod, ®op, &rm); |
| 639 | int imm8 = -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 640 | const char* mnem = NULL; |
| 641 | switch (regop) { |
| 642 | case kROL: |
| 643 | mnem = "rol"; |
| 644 | break; |
| 645 | case kROR: |
| 646 | mnem = "ror"; |
| 647 | break; |
| 648 | case kRCL: |
| 649 | mnem = "rcl"; |
| 650 | break; |
| 651 | case kRCR: |
| 652 | mnem = "rcr"; |
| 653 | break; |
| 654 | case kSHL: |
| 655 | mnem = "shl"; |
| 656 | break; |
| 657 | case KSHR: |
| 658 | mnem = "shr"; |
| 659 | break; |
| 660 | case kSAR: |
| 661 | mnem = "sar"; |
| 662 | break; |
| 663 | default: |
| 664 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 665 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 666 | AppendToBuffer("%s ", mnem); |
| 667 | int count = PrintRightOperand(data); |
| 668 | if (op == 0xD1) { |
| 669 | imm8 = 1; |
| 670 | } else if (op == 0xC1) { |
| 671 | imm8 = *(data + 1); |
| 672 | count++; |
| 673 | } else if (op == 0xD3) { |
| 674 | // Shift/rotate by cl. |
| 675 | } |
| 676 | if (imm8 >= 0) { |
| 677 | AppendToBuffer(",%d", imm8); |
| 678 | } else { |
| 679 | AppendToBuffer(",cl"); |
| 680 | } |
| 681 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | |
| 685 | // Returns number of bytes used, including *data. |
| 686 | int DisassemblerIA32::JumpShort(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 687 | DCHECK_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 688 | byte b = *(data+1); |
| 689 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 690 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 691 | return 2; |
| 692 | } |
| 693 | |
| 694 | |
| 695 | // Returns number of bytes used, including *data. |
| 696 | int DisassemblerIA32::JumpConditional(byte* data, const char* comment) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 697 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 698 | byte cond = *(data+1) & 0x0F; |
| 699 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 700 | const char* mnem = jump_conditional_mnem[cond]; |
| 701 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 702 | if (comment != NULL) { |
| 703 | AppendToBuffer(", %s", comment); |
| 704 | } |
| 705 | return 6; // includes 0x0F |
| 706 | } |
| 707 | |
| 708 | |
| 709 | // Returns number of bytes used, including *data. |
| 710 | int DisassemblerIA32::JumpConditionalShort(byte* data, const char* comment) { |
| 711 | byte cond = *data & 0x0F; |
| 712 | byte b = *(data+1); |
| 713 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 714 | const char* mnem = jump_conditional_mnem[cond]; |
| 715 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 716 | if (comment != NULL) { |
| 717 | AppendToBuffer(", %s", comment); |
| 718 | } |
| 719 | return 2; |
| 720 | } |
| 721 | |
| 722 | |
| 723 | // Returns number of bytes used, including *data. |
| 724 | int DisassemblerIA32::SetCC(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 725 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 726 | byte cond = *(data+1) & 0x0F; |
| 727 | const char* mnem = set_conditional_mnem[cond]; |
| 728 | AppendToBuffer("%s ", mnem); |
| 729 | PrintRightByteOperand(data+2); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 730 | return 3; // Includes 0x0F. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | |
| 734 | // Returns number of bytes used, including *data. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 735 | int DisassemblerIA32::CMov(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 736 | DCHECK_EQ(0x0F, *data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 737 | byte cond = *(data + 1) & 0x0F; |
| 738 | const char* mnem = conditional_move_mnem[cond]; |
| 739 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 740 | return 2 + op_size; // includes 0x0F |
| 741 | } |
| 742 | |
| 743 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 744 | int DisassemblerIA32::AVXInstruction(byte* data) { |
| 745 | byte opcode = *data; |
| 746 | byte* current = data + 1; |
| 747 | if (vex_66() && vex_0f38()) { |
| 748 | int mod, regop, rm, vvvv = vex_vreg(); |
| 749 | get_modrm(*current, &mod, ®op, &rm); |
| 750 | switch (opcode) { |
| 751 | case 0x99: |
| 752 | AppendToBuffer("vfmadd132s%c %s,%s,", float_size_code(), |
| 753 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 754 | current += PrintRightXMMOperand(current); |
| 755 | break; |
| 756 | case 0xa9: |
| 757 | AppendToBuffer("vfmadd213s%c %s,%s,", float_size_code(), |
| 758 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 759 | current += PrintRightXMMOperand(current); |
| 760 | break; |
| 761 | case 0xb9: |
| 762 | AppendToBuffer("vfmadd231s%c %s,%s,", float_size_code(), |
| 763 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 764 | current += PrintRightXMMOperand(current); |
| 765 | break; |
| 766 | case 0x9b: |
| 767 | AppendToBuffer("vfmsub132s%c %s,%s,", float_size_code(), |
| 768 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 769 | current += PrintRightXMMOperand(current); |
| 770 | break; |
| 771 | case 0xab: |
| 772 | AppendToBuffer("vfmsub213s%c %s,%s,", float_size_code(), |
| 773 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 774 | current += PrintRightXMMOperand(current); |
| 775 | break; |
| 776 | case 0xbb: |
| 777 | AppendToBuffer("vfmsub231s%c %s,%s,", float_size_code(), |
| 778 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 779 | current += PrintRightXMMOperand(current); |
| 780 | break; |
| 781 | case 0x9d: |
| 782 | AppendToBuffer("vfnmadd132s%c %s,%s,", float_size_code(), |
| 783 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 784 | current += PrintRightXMMOperand(current); |
| 785 | break; |
| 786 | case 0xad: |
| 787 | AppendToBuffer("vfnmadd213s%c %s,%s,", float_size_code(), |
| 788 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 789 | current += PrintRightXMMOperand(current); |
| 790 | break; |
| 791 | case 0xbd: |
| 792 | AppendToBuffer("vfnmadd231s%c %s,%s,", float_size_code(), |
| 793 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 794 | current += PrintRightXMMOperand(current); |
| 795 | break; |
| 796 | case 0x9f: |
| 797 | AppendToBuffer("vfnmsub132s%c %s,%s,", float_size_code(), |
| 798 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 799 | current += PrintRightXMMOperand(current); |
| 800 | break; |
| 801 | case 0xaf: |
| 802 | AppendToBuffer("vfnmsub213s%c %s,%s,", float_size_code(), |
| 803 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 804 | current += PrintRightXMMOperand(current); |
| 805 | break; |
| 806 | case 0xbf: |
| 807 | AppendToBuffer("vfnmsub231s%c %s,%s,", float_size_code(), |
| 808 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 809 | current += PrintRightXMMOperand(current); |
| 810 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 811 | case 0xf7: |
| 812 | AppendToBuffer("shlx %s,", NameOfCPURegister(regop)); |
| 813 | current += PrintRightOperand(current); |
| 814 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 815 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 816 | default: |
| 817 | UnimplementedInstruction(); |
| 818 | } |
| 819 | } else if (vex_f2() && vex_0f()) { |
| 820 | int mod, regop, rm, vvvv = vex_vreg(); |
| 821 | get_modrm(*current, &mod, ®op, &rm); |
| 822 | switch (opcode) { |
| 823 | case 0x58: |
| 824 | AppendToBuffer("vaddsd %s,%s,", NameOfXMMRegister(regop), |
| 825 | NameOfXMMRegister(vvvv)); |
| 826 | current += PrintRightXMMOperand(current); |
| 827 | break; |
| 828 | case 0x59: |
| 829 | AppendToBuffer("vmulsd %s,%s,", NameOfXMMRegister(regop), |
| 830 | NameOfXMMRegister(vvvv)); |
| 831 | current += PrintRightXMMOperand(current); |
| 832 | break; |
| 833 | case 0x5c: |
| 834 | AppendToBuffer("vsubsd %s,%s,", NameOfXMMRegister(regop), |
| 835 | NameOfXMMRegister(vvvv)); |
| 836 | current += PrintRightXMMOperand(current); |
| 837 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 838 | case 0x5d: |
| 839 | AppendToBuffer("vminsd %s,%s,", NameOfXMMRegister(regop), |
| 840 | NameOfXMMRegister(vvvv)); |
| 841 | current += PrintRightXMMOperand(current); |
| 842 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 843 | case 0x5e: |
| 844 | AppendToBuffer("vdivsd %s,%s,", NameOfXMMRegister(regop), |
| 845 | NameOfXMMRegister(vvvv)); |
| 846 | current += PrintRightXMMOperand(current); |
| 847 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 848 | case 0x5f: |
| 849 | AppendToBuffer("vmaxsd %s,%s,", NameOfXMMRegister(regop), |
| 850 | NameOfXMMRegister(vvvv)); |
| 851 | current += PrintRightXMMOperand(current); |
| 852 | break; |
| 853 | default: |
| 854 | UnimplementedInstruction(); |
| 855 | } |
| 856 | } else if (vex_f3() && vex_0f()) { |
| 857 | int mod, regop, rm, vvvv = vex_vreg(); |
| 858 | get_modrm(*current, &mod, ®op, &rm); |
| 859 | switch (opcode) { |
| 860 | case 0x58: |
| 861 | AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop), |
| 862 | NameOfXMMRegister(vvvv)); |
| 863 | current += PrintRightXMMOperand(current); |
| 864 | break; |
| 865 | case 0x59: |
| 866 | AppendToBuffer("vmulss %s,%s,", NameOfXMMRegister(regop), |
| 867 | NameOfXMMRegister(vvvv)); |
| 868 | current += PrintRightXMMOperand(current); |
| 869 | break; |
| 870 | case 0x5c: |
| 871 | AppendToBuffer("vsubss %s,%s,", NameOfXMMRegister(regop), |
| 872 | NameOfXMMRegister(vvvv)); |
| 873 | current += PrintRightXMMOperand(current); |
| 874 | break; |
| 875 | case 0x5d: |
| 876 | AppendToBuffer("vminss %s,%s,", NameOfXMMRegister(regop), |
| 877 | NameOfXMMRegister(vvvv)); |
| 878 | current += PrintRightXMMOperand(current); |
| 879 | break; |
| 880 | case 0x5e: |
| 881 | AppendToBuffer("vdivss %s,%s,", NameOfXMMRegister(regop), |
| 882 | NameOfXMMRegister(vvvv)); |
| 883 | current += PrintRightXMMOperand(current); |
| 884 | break; |
| 885 | case 0x5f: |
| 886 | AppendToBuffer("vmaxss %s,%s,", NameOfXMMRegister(regop), |
| 887 | NameOfXMMRegister(vvvv)); |
| 888 | current += PrintRightXMMOperand(current); |
| 889 | break; |
| 890 | default: |
| 891 | UnimplementedInstruction(); |
| 892 | } |
| 893 | } else if (vex_none() && vex_0f38()) { |
| 894 | int mod, regop, rm, vvvv = vex_vreg(); |
| 895 | get_modrm(*current, &mod, ®op, &rm); |
| 896 | const char* mnem = "?"; |
| 897 | switch (opcode) { |
| 898 | case 0xf2: |
| 899 | AppendToBuffer("andn %s,%s,", NameOfCPURegister(regop), |
| 900 | NameOfCPURegister(vvvv)); |
| 901 | current += PrintRightOperand(current); |
| 902 | break; |
| 903 | case 0xf5: |
| 904 | AppendToBuffer("bzhi %s,", NameOfCPURegister(regop)); |
| 905 | current += PrintRightOperand(current); |
| 906 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 907 | break; |
| 908 | case 0xf7: |
| 909 | AppendToBuffer("bextr %s,", NameOfCPURegister(regop)); |
| 910 | current += PrintRightOperand(current); |
| 911 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 912 | break; |
| 913 | case 0xf3: |
| 914 | switch (regop) { |
| 915 | case 1: |
| 916 | mnem = "blsr"; |
| 917 | break; |
| 918 | case 2: |
| 919 | mnem = "blsmsk"; |
| 920 | break; |
| 921 | case 3: |
| 922 | mnem = "blsi"; |
| 923 | break; |
| 924 | default: |
| 925 | UnimplementedInstruction(); |
| 926 | } |
| 927 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(vvvv)); |
| 928 | current += PrintRightOperand(current); |
| 929 | mnem = "?"; |
| 930 | break; |
| 931 | default: |
| 932 | UnimplementedInstruction(); |
| 933 | } |
| 934 | } else if (vex_f2() && vex_0f38()) { |
| 935 | int mod, regop, rm, vvvv = vex_vreg(); |
| 936 | get_modrm(*current, &mod, ®op, &rm); |
| 937 | switch (opcode) { |
| 938 | case 0xf5: |
| 939 | AppendToBuffer("pdep %s,%s,", NameOfCPURegister(regop), |
| 940 | NameOfCPURegister(vvvv)); |
| 941 | current += PrintRightOperand(current); |
| 942 | break; |
| 943 | case 0xf6: |
| 944 | AppendToBuffer("mulx %s,%s,", NameOfCPURegister(regop), |
| 945 | NameOfCPURegister(vvvv)); |
| 946 | current += PrintRightOperand(current); |
| 947 | break; |
| 948 | case 0xf7: |
| 949 | AppendToBuffer("shrx %s,", NameOfCPURegister(regop)); |
| 950 | current += PrintRightOperand(current); |
| 951 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 952 | break; |
| 953 | default: |
| 954 | UnimplementedInstruction(); |
| 955 | } |
| 956 | } else if (vex_f3() && vex_0f38()) { |
| 957 | int mod, regop, rm, vvvv = vex_vreg(); |
| 958 | get_modrm(*current, &mod, ®op, &rm); |
| 959 | switch (opcode) { |
| 960 | case 0xf5: |
| 961 | AppendToBuffer("pext %s,%s,", NameOfCPURegister(regop), |
| 962 | NameOfCPURegister(vvvv)); |
| 963 | current += PrintRightOperand(current); |
| 964 | break; |
| 965 | case 0xf7: |
| 966 | AppendToBuffer("sarx %s,", NameOfCPURegister(regop)); |
| 967 | current += PrintRightOperand(current); |
| 968 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 969 | break; |
| 970 | default: |
| 971 | UnimplementedInstruction(); |
| 972 | } |
| 973 | } else if (vex_f2() && vex_0f3a()) { |
| 974 | int mod, regop, rm; |
| 975 | get_modrm(*current, &mod, ®op, &rm); |
| 976 | switch (opcode) { |
| 977 | case 0xf0: |
| 978 | AppendToBuffer("rorx %s,", NameOfCPURegister(regop)); |
| 979 | current += PrintRightOperand(current); |
| 980 | AppendToBuffer(",%d", *current & 0x1f); |
| 981 | current += 1; |
| 982 | break; |
| 983 | default: |
| 984 | UnimplementedInstruction(); |
| 985 | } |
| 986 | } else if (vex_none() && vex_0f()) { |
| 987 | int mod, regop, rm, vvvv = vex_vreg(); |
| 988 | get_modrm(*current, &mod, ®op, &rm); |
| 989 | switch (opcode) { |
| 990 | case 0x54: |
| 991 | AppendToBuffer("vandps %s,%s,", NameOfXMMRegister(regop), |
| 992 | NameOfXMMRegister(vvvv)); |
| 993 | current += PrintRightXMMOperand(current); |
| 994 | break; |
| 995 | case 0x57: |
| 996 | AppendToBuffer("vxorps %s,%s,", NameOfXMMRegister(regop), |
| 997 | NameOfXMMRegister(vvvv)); |
| 998 | current += PrintRightXMMOperand(current); |
| 999 | break; |
| 1000 | default: |
| 1001 | UnimplementedInstruction(); |
| 1002 | } |
| 1003 | } else if (vex_66() && vex_0f()) { |
| 1004 | int mod, regop, rm, vvvv = vex_vreg(); |
| 1005 | get_modrm(*current, &mod, ®op, &rm); |
| 1006 | switch (opcode) { |
| 1007 | case 0x54: |
| 1008 | AppendToBuffer("vandpd %s,%s,", NameOfXMMRegister(regop), |
| 1009 | NameOfXMMRegister(vvvv)); |
| 1010 | current += PrintRightXMMOperand(current); |
| 1011 | break; |
| 1012 | case 0x57: |
| 1013 | AppendToBuffer("vxorpd %s,%s,", NameOfXMMRegister(regop), |
| 1014 | NameOfXMMRegister(vvvv)); |
| 1015 | current += PrintRightXMMOperand(current); |
| 1016 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1017 | default: |
| 1018 | UnimplementedInstruction(); |
| 1019 | } |
| 1020 | } else { |
| 1021 | UnimplementedInstruction(); |
| 1022 | } |
| 1023 | |
| 1024 | return static_cast<int>(current - data); |
| 1025 | } |
| 1026 | |
| 1027 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1028 | // Returns number of bytes used, including *data. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1029 | int DisassemblerIA32::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1030 | byte escape_opcode = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1031 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1032 | byte modrm_byte = *(data+1); |
| 1033 | |
| 1034 | if (modrm_byte >= 0xC0) { |
| 1035 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 1036 | } else { |
| 1037 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1038 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode, |
| 1042 | int modrm_byte, |
| 1043 | byte* modrm_start) { |
| 1044 | const char* mnem = "?"; |
| 1045 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 1046 | switch (escape_opcode) { |
| 1047 | case 0xD9: switch (regop) { |
| 1048 | case 0: mnem = "fld_s"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1049 | case 2: mnem = "fst_s"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1050 | case 3: mnem = "fstp_s"; break; |
| 1051 | case 7: mnem = "fstcw"; break; |
| 1052 | default: UnimplementedInstruction(); |
| 1053 | } |
| 1054 | break; |
| 1055 | |
| 1056 | case 0xDB: switch (regop) { |
| 1057 | case 0: mnem = "fild_s"; break; |
| 1058 | case 1: mnem = "fisttp_s"; break; |
| 1059 | case 2: mnem = "fist_s"; break; |
| 1060 | case 3: mnem = "fistp_s"; break; |
| 1061 | default: UnimplementedInstruction(); |
| 1062 | } |
| 1063 | break; |
| 1064 | |
| 1065 | case 0xDD: switch (regop) { |
| 1066 | case 0: mnem = "fld_d"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1067 | case 1: mnem = "fisttp_d"; break; |
| 1068 | case 2: mnem = "fst_d"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1069 | case 3: mnem = "fstp_d"; break; |
| 1070 | default: UnimplementedInstruction(); |
| 1071 | } |
| 1072 | break; |
| 1073 | |
| 1074 | case 0xDF: switch (regop) { |
| 1075 | case 5: mnem = "fild_d"; break; |
| 1076 | case 7: mnem = "fistp_d"; break; |
| 1077 | default: UnimplementedInstruction(); |
| 1078 | } |
| 1079 | break; |
| 1080 | |
| 1081 | default: UnimplementedInstruction(); |
| 1082 | } |
| 1083 | AppendToBuffer("%s ", mnem); |
| 1084 | int count = PrintRightOperand(modrm_start); |
| 1085 | return count + 1; |
| 1086 | } |
| 1087 | |
| 1088 | int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode, |
| 1089 | byte modrm_byte) { |
| 1090 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 1091 | const char* mnem = "?"; |
| 1092 | |
| 1093 | switch (escape_opcode) { |
| 1094 | case 0xD8: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1095 | has_register = true; |
| 1096 | switch (modrm_byte & 0xF8) { |
| 1097 | case 0xC0: mnem = "fadd_i"; break; |
| 1098 | case 0xE0: mnem = "fsub_i"; break; |
| 1099 | case 0xC8: mnem = "fmul_i"; break; |
| 1100 | case 0xF0: mnem = "fdiv_i"; break; |
| 1101 | default: UnimplementedInstruction(); |
| 1102 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1103 | break; |
| 1104 | |
| 1105 | case 0xD9: |
| 1106 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1107 | case 0xC0: |
| 1108 | mnem = "fld"; |
| 1109 | has_register = true; |
| 1110 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1111 | case 0xC8: |
| 1112 | mnem = "fxch"; |
| 1113 | has_register = true; |
| 1114 | break; |
| 1115 | default: |
| 1116 | switch (modrm_byte) { |
| 1117 | case 0xE0: mnem = "fchs"; break; |
| 1118 | case 0xE1: mnem = "fabs"; break; |
| 1119 | case 0xE4: mnem = "ftst"; break; |
| 1120 | case 0xE8: mnem = "fld1"; break; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1121 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1122 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1123 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1124 | case 0xF0: mnem = "f2xm1"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1125 | case 0xF1: mnem = "fyl2x"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1126 | case 0xF4: mnem = "fxtract"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1127 | case 0xF5: mnem = "fprem1"; break; |
| 1128 | case 0xF7: mnem = "fincstp"; break; |
| 1129 | case 0xF8: mnem = "fprem"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1130 | case 0xFC: mnem = "frndint"; break; |
| 1131 | case 0xFD: mnem = "fscale"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1132 | case 0xFE: mnem = "fsin"; break; |
| 1133 | case 0xFF: mnem = "fcos"; break; |
| 1134 | default: UnimplementedInstruction(); |
| 1135 | } |
| 1136 | } |
| 1137 | break; |
| 1138 | |
| 1139 | case 0xDA: |
| 1140 | if (modrm_byte == 0xE9) { |
| 1141 | mnem = "fucompp"; |
| 1142 | } else { |
| 1143 | UnimplementedInstruction(); |
| 1144 | } |
| 1145 | break; |
| 1146 | |
| 1147 | case 0xDB: |
| 1148 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 1149 | mnem = "fucomi"; |
| 1150 | has_register = true; |
| 1151 | } else if (modrm_byte == 0xE2) { |
| 1152 | mnem = "fclex"; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1153 | } else if (modrm_byte == 0xE3) { |
| 1154 | mnem = "fninit"; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1155 | } else { |
| 1156 | UnimplementedInstruction(); |
| 1157 | } |
| 1158 | break; |
| 1159 | |
| 1160 | case 0xDC: |
| 1161 | has_register = true; |
| 1162 | switch (modrm_byte & 0xF8) { |
| 1163 | case 0xC0: mnem = "fadd"; break; |
| 1164 | case 0xE8: mnem = "fsub"; break; |
| 1165 | case 0xC8: mnem = "fmul"; break; |
| 1166 | case 0xF8: mnem = "fdiv"; break; |
| 1167 | default: UnimplementedInstruction(); |
| 1168 | } |
| 1169 | break; |
| 1170 | |
| 1171 | case 0xDD: |
| 1172 | has_register = true; |
| 1173 | switch (modrm_byte & 0xF8) { |
| 1174 | case 0xC0: mnem = "ffree"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1175 | case 0xD0: mnem = "fst"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1176 | case 0xD8: mnem = "fstp"; break; |
| 1177 | default: UnimplementedInstruction(); |
| 1178 | } |
| 1179 | break; |
| 1180 | |
| 1181 | case 0xDE: |
| 1182 | if (modrm_byte == 0xD9) { |
| 1183 | mnem = "fcompp"; |
| 1184 | } else { |
| 1185 | has_register = true; |
| 1186 | switch (modrm_byte & 0xF8) { |
| 1187 | case 0xC0: mnem = "faddp"; break; |
| 1188 | case 0xE8: mnem = "fsubp"; break; |
| 1189 | case 0xC8: mnem = "fmulp"; break; |
| 1190 | case 0xF8: mnem = "fdivp"; break; |
| 1191 | default: UnimplementedInstruction(); |
| 1192 | } |
| 1193 | } |
| 1194 | break; |
| 1195 | |
| 1196 | case 0xDF: |
| 1197 | if (modrm_byte == 0xE0) { |
| 1198 | mnem = "fnstsw_ax"; |
| 1199 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 1200 | mnem = "fucomip"; |
| 1201 | has_register = true; |
| 1202 | } |
| 1203 | break; |
| 1204 | |
| 1205 | default: UnimplementedInstruction(); |
| 1206 | } |
| 1207 | |
| 1208 | if (has_register) { |
| 1209 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 1210 | } else { |
| 1211 | AppendToBuffer("%s", mnem); |
| 1212 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1213 | return 2; |
| 1214 | } |
| 1215 | |
| 1216 | |
| 1217 | // Mnemonics for instructions 0xF0 byte. |
| 1218 | // Returns NULL if the instruction is not handled here. |
| 1219 | static const char* F0Mnem(byte f0byte) { |
| 1220 | switch (f0byte) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1221 | case 0x0B: |
| 1222 | return "ud2"; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1223 | case 0x18: return "prefetch"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1224 | case 0xA2: return "cpuid"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1225 | case 0xBE: return "movsx_b"; |
| 1226 | case 0xBF: return "movsx_w"; |
| 1227 | case 0xB6: return "movzx_b"; |
| 1228 | case 0xB7: return "movzx_w"; |
| 1229 | case 0xAF: return "imul"; |
| 1230 | case 0xA5: return "shld"; |
| 1231 | case 0xAD: return "shrd"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1232 | case 0xAC: return "shrd"; // 3-operand version. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1233 | case 0xAB: return "bts"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1234 | case 0xBC: |
| 1235 | return "bsf"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1236 | case 0xBD: return "bsr"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1237 | default: return NULL; |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | |
| 1242 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 1243 | int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 1244 | byte* instr) { |
| 1245 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 1246 | byte* data = instr; |
| 1247 | // Check for hints. |
| 1248 | const char* branch_hint = NULL; |
| 1249 | // We use these two prefixes only with branch prediction |
| 1250 | if (*data == 0x3E /*ds*/) { |
| 1251 | branch_hint = "predicted taken"; |
| 1252 | data++; |
| 1253 | } else if (*data == 0x2E /*cs*/) { |
| 1254 | branch_hint = "predicted not taken"; |
| 1255 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1256 | } else if (*data == 0xC4 && *(data + 1) >= 0xc0) { |
| 1257 | vex_byte0_ = *data; |
| 1258 | vex_byte1_ = *(data + 1); |
| 1259 | vex_byte2_ = *(data + 2); |
| 1260 | data += 3; |
| 1261 | } else if (*data == 0xC5 && *(data + 1) >= 0xc0) { |
| 1262 | vex_byte0_ = *data; |
| 1263 | vex_byte1_ = *(data + 1); |
| 1264 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1265 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1266 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1267 | bool processed = true; // Will be set to false if the current instruction |
| 1268 | // is not in 'instructions' table. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1269 | // Decode AVX instructions. |
| 1270 | if (vex_byte0_ != 0) { |
| 1271 | data += AVXInstruction(data); |
| 1272 | } else { |
| 1273 | const InstructionDesc& idesc = instruction_table_->Get(*data); |
| 1274 | switch (idesc.type) { |
| 1275 | case ZERO_OPERANDS_INSTR: |
| 1276 | AppendToBuffer(idesc.mnem); |
| 1277 | data++; |
| 1278 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1279 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1280 | case TWO_OPERANDS_INSTR: |
| 1281 | data++; |
| 1282 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 1283 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1284 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1285 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 1286 | data += JumpConditionalShort(data, branch_hint); |
| 1287 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1288 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1289 | case REGISTER_INSTR: |
| 1290 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 1291 | data++; |
| 1292 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1293 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1294 | case MOVE_REG_INSTR: { |
| 1295 | byte* addr = |
| 1296 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1297 | AppendToBuffer("mov %s,%s", NameOfCPURegister(*data & 0x07), |
| 1298 | NameOfAddress(addr)); |
| 1299 | data += 5; |
| 1300 | break; |
| 1301 | } |
| 1302 | |
| 1303 | case CALL_JUMP_INSTR: { |
| 1304 | byte* addr = data + *reinterpret_cast<int32_t*>(data + 1) + 5; |
| 1305 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 1306 | data += 5; |
| 1307 | break; |
| 1308 | } |
| 1309 | |
| 1310 | case SHORT_IMMEDIATE_INSTR: { |
| 1311 | byte* addr = |
| 1312 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1313 | AppendToBuffer("%s eax,%s", idesc.mnem, NameOfAddress(addr)); |
| 1314 | data += 5; |
| 1315 | break; |
| 1316 | } |
| 1317 | |
| 1318 | case BYTE_IMMEDIATE_INSTR: { |
| 1319 | AppendToBuffer("%s al,0x%x", idesc.mnem, data[1]); |
| 1320 | data += 2; |
| 1321 | break; |
| 1322 | } |
| 1323 | |
| 1324 | case NO_INSTR: |
| 1325 | processed = false; |
| 1326 | break; |
| 1327 | |
| 1328 | default: |
| 1329 | UNIMPLEMENTED(); // This type is not implemented. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1330 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1331 | } |
| 1332 | //---------------------------- |
| 1333 | if (!processed) { |
| 1334 | switch (*data) { |
| 1335 | case 0xC2: |
| 1336 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 1337 | data += 3; |
| 1338 | break; |
| 1339 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1340 | case 0x6B: { |
| 1341 | data++; |
| 1342 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1343 | AppendToBuffer(",%d", *data); |
| 1344 | data++; |
| 1345 | } break; |
| 1346 | |
| 1347 | case 0x69: { |
| 1348 | data++; |
| 1349 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1350 | AppendToBuffer(",%d", *reinterpret_cast<int32_t*>(data)); |
| 1351 | data += 4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1352 | } |
| 1353 | break; |
| 1354 | |
| 1355 | case 0xF6: |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1356 | { data++; |
| 1357 | int mod, regop, rm; |
| 1358 | get_modrm(*data, &mod, ®op, &rm); |
| 1359 | if (regop == eax) { |
| 1360 | AppendToBuffer("test_b "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1361 | data += PrintRightByteOperand(data); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1362 | int32_t imm = *data; |
| 1363 | AppendToBuffer(",0x%x", imm); |
| 1364 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1365 | } else { |
| 1366 | UnimplementedInstruction(); |
| 1367 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1368 | } |
| 1369 | break; |
| 1370 | |
| 1371 | case 0x81: // fall through |
| 1372 | case 0x83: // 0x81 with sign extension bit set |
| 1373 | data += PrintImmediateOp(data); |
| 1374 | break; |
| 1375 | |
| 1376 | case 0x0F: |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1377 | { byte f0byte = data[1]; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1378 | const char* f0mnem = F0Mnem(f0byte); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1379 | if (f0byte == 0x18) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1380 | data += 2; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1381 | int mod, regop, rm; |
| 1382 | get_modrm(*data, &mod, ®op, &rm); |
| 1383 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 1384 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 1385 | data += PrintRightOperand(data); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1386 | } else if (f0byte == 0x1F && data[2] == 0) { |
| 1387 | AppendToBuffer("nop"); // 3 byte nop. |
| 1388 | data += 3; |
| 1389 | } else if (f0byte == 0x1F && data[2] == 0x40 && data[3] == 0) { |
| 1390 | AppendToBuffer("nop"); // 4 byte nop. |
| 1391 | data += 4; |
| 1392 | } else if (f0byte == 0x1F && data[2] == 0x44 && data[3] == 0 && |
| 1393 | data[4] == 0) { |
| 1394 | AppendToBuffer("nop"); // 5 byte nop. |
| 1395 | data += 5; |
| 1396 | } else if (f0byte == 0x1F && data[2] == 0x80 && data[3] == 0 && |
| 1397 | data[4] == 0 && data[5] == 0 && data[6] == 0) { |
| 1398 | AppendToBuffer("nop"); // 7 byte nop. |
| 1399 | data += 7; |
| 1400 | } else if (f0byte == 0x1F && data[2] == 0x84 && data[3] == 0 && |
| 1401 | data[4] == 0 && data[5] == 0 && data[6] == 0 && |
| 1402 | data[7] == 0) { |
| 1403 | AppendToBuffer("nop"); // 8 byte nop. |
| 1404 | data += 8; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1405 | } else if (f0byte == 0x0B || f0byte == 0xA2 || f0byte == 0x31) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1406 | AppendToBuffer("%s", f0mnem); |
| 1407 | data += 2; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1408 | } else if (f0byte == 0x28) { |
| 1409 | data += 2; |
| 1410 | int mod, regop, rm; |
| 1411 | get_modrm(*data, &mod, ®op, &rm); |
| 1412 | AppendToBuffer("movaps %s,%s", |
| 1413 | NameOfXMMRegister(regop), |
| 1414 | NameOfXMMRegister(rm)); |
| 1415 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1416 | } else if (f0byte == 0x2e) { |
| 1417 | data += 2; |
| 1418 | int mod, regop, rm; |
| 1419 | get_modrm(*data, &mod, ®op, &rm); |
| 1420 | AppendToBuffer("ucomiss %s,", NameOfXMMRegister(regop)); |
| 1421 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1422 | } else if (f0byte >= 0x53 && f0byte <= 0x5F) { |
| 1423 | const char* const pseudo_op[] = { |
| 1424 | "rcpps", |
| 1425 | "andps", |
| 1426 | "andnps", |
| 1427 | "orps", |
| 1428 | "xorps", |
| 1429 | "addps", |
| 1430 | "mulps", |
| 1431 | "cvtps2pd", |
| 1432 | "cvtdq2ps", |
| 1433 | "subps", |
| 1434 | "minps", |
| 1435 | "divps", |
| 1436 | "maxps", |
| 1437 | }; |
| 1438 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1439 | data += 2; |
| 1440 | int mod, regop, rm; |
| 1441 | get_modrm(*data, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1442 | AppendToBuffer("%s %s,", |
| 1443 | pseudo_op[f0byte - 0x53], |
| 1444 | NameOfXMMRegister(regop)); |
| 1445 | data += PrintRightXMMOperand(data); |
| 1446 | } else if (f0byte == 0x50) { |
| 1447 | data += 2; |
| 1448 | int mod, regop, rm; |
| 1449 | get_modrm(*data, &mod, ®op, &rm); |
| 1450 | AppendToBuffer("movmskps %s,%s", |
| 1451 | NameOfCPURegister(regop), |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1452 | NameOfXMMRegister(rm)); |
| 1453 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1454 | } else if (f0byte== 0xC6) { |
| 1455 | // shufps xmm, xmm/m128, imm8 |
| 1456 | data += 2; |
| 1457 | int mod, regop, rm; |
| 1458 | get_modrm(*data, &mod, ®op, &rm); |
| 1459 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1460 | AppendToBuffer("shufps %s,%s,%d", |
| 1461 | NameOfXMMRegister(rm), |
| 1462 | NameOfXMMRegister(regop), |
| 1463 | static_cast<int>(imm8)); |
| 1464 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1465 | } else if ((f0byte & 0xF0) == 0x80) { |
| 1466 | data += JumpConditional(data, branch_hint); |
| 1467 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 1468 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 1469 | data += 2; |
| 1470 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 1471 | } else if ((f0byte & 0xF0) == 0x90) { |
| 1472 | data += SetCC(data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1473 | } else if ((f0byte & 0xF0) == 0x40) { |
| 1474 | data += CMov(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1475 | } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
| 1476 | // shrd, shld, bts |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1477 | data += 2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1478 | AppendToBuffer("%s ", f0mnem); |
| 1479 | int mod, regop, rm; |
| 1480 | get_modrm(*data, &mod, ®op, &rm); |
| 1481 | data += PrintRightOperand(data); |
| 1482 | if (f0byte == 0xAB) { |
| 1483 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1484 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1485 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1486 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1487 | } else if (f0byte == 0xBC) { |
| 1488 | data += 2; |
| 1489 | int mod, regop, rm; |
| 1490 | get_modrm(*data, &mod, ®op, &rm); |
| 1491 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1492 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1493 | } else if (f0byte == 0xBD) { |
| 1494 | data += 2; |
| 1495 | int mod, regop, rm; |
| 1496 | get_modrm(*data, &mod, ®op, &rm); |
| 1497 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1498 | data += PrintRightOperand(data); |
| 1499 | } else { |
| 1500 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1501 | } |
| 1502 | } |
| 1503 | break; |
| 1504 | |
| 1505 | case 0x8F: |
| 1506 | { data++; |
| 1507 | int mod, regop, rm; |
| 1508 | get_modrm(*data, &mod, ®op, &rm); |
| 1509 | if (regop == eax) { |
| 1510 | AppendToBuffer("pop "); |
| 1511 | data += PrintRightOperand(data); |
| 1512 | } |
| 1513 | } |
| 1514 | break; |
| 1515 | |
| 1516 | case 0xFF: |
| 1517 | { data++; |
| 1518 | int mod, regop, rm; |
| 1519 | get_modrm(*data, &mod, ®op, &rm); |
| 1520 | const char* mnem = NULL; |
| 1521 | switch (regop) { |
| 1522 | case esi: mnem = "push"; break; |
| 1523 | case eax: mnem = "inc"; break; |
| 1524 | case ecx: mnem = "dec"; break; |
| 1525 | case edx: mnem = "call"; break; |
| 1526 | case esp: mnem = "jmp"; break; |
| 1527 | default: mnem = "???"; |
| 1528 | } |
| 1529 | AppendToBuffer("%s ", mnem); |
| 1530 | data += PrintRightOperand(data); |
| 1531 | } |
| 1532 | break; |
| 1533 | |
| 1534 | case 0xC7: // imm32, fall through |
| 1535 | case 0xC6: // imm8 |
| 1536 | { bool is_byte = *data == 0xC6; |
| 1537 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1538 | if (is_byte) { |
| 1539 | AppendToBuffer("%s ", "mov_b"); |
| 1540 | data += PrintRightByteOperand(data); |
| 1541 | int32_t imm = *data; |
| 1542 | AppendToBuffer(",0x%x", imm); |
| 1543 | data++; |
| 1544 | } else { |
| 1545 | AppendToBuffer("%s ", "mov"); |
| 1546 | data += PrintRightOperand(data); |
| 1547 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1548 | AppendToBuffer(",0x%x", imm); |
| 1549 | data += 4; |
| 1550 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1551 | } |
| 1552 | break; |
| 1553 | |
| 1554 | case 0x80: |
| 1555 | { data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1556 | int mod, regop, rm; |
| 1557 | get_modrm(*data, &mod, ®op, &rm); |
| 1558 | const char* mnem = NULL; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1559 | switch (regop) { |
| 1560 | case 5: mnem = "subb"; break; |
| 1561 | case 7: mnem = "cmpb"; break; |
| 1562 | default: UnimplementedInstruction(); |
| 1563 | } |
| 1564 | AppendToBuffer("%s ", mnem); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1565 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1566 | int32_t imm = *data; |
| 1567 | AppendToBuffer(",0x%x", imm); |
| 1568 | data++; |
| 1569 | } |
| 1570 | break; |
| 1571 | |
| 1572 | case 0x88: // 8bit, fall through |
| 1573 | case 0x89: // 32bit |
| 1574 | { bool is_byte = *data == 0x88; |
| 1575 | int mod, regop, rm; |
| 1576 | data++; |
| 1577 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1578 | if (is_byte) { |
| 1579 | AppendToBuffer("%s ", "mov_b"); |
| 1580 | data += PrintRightByteOperand(data); |
| 1581 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1582 | } else { |
| 1583 | AppendToBuffer("%s ", "mov"); |
| 1584 | data += PrintRightOperand(data); |
| 1585 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1586 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1587 | } |
| 1588 | break; |
| 1589 | |
| 1590 | case 0x66: // prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1591 | while (*data == 0x66) data++; |
| 1592 | if (*data == 0xf && data[1] == 0x1f) { |
| 1593 | AppendToBuffer("nop"); // 0x66 prefix |
| 1594 | } else if (*data == 0x90) { |
| 1595 | AppendToBuffer("nop"); // 0x66 prefix |
| 1596 | } else if (*data == 0x8B) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1597 | data++; |
| 1598 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
| 1599 | } else if (*data == 0x89) { |
| 1600 | data++; |
| 1601 | int mod, regop, rm; |
| 1602 | get_modrm(*data, &mod, ®op, &rm); |
| 1603 | AppendToBuffer("mov_w "); |
| 1604 | data += PrintRightOperand(data); |
| 1605 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1606 | } else if (*data == 0xC7) { |
| 1607 | data++; |
| 1608 | AppendToBuffer("%s ", "mov_w"); |
| 1609 | data += PrintRightOperand(data); |
| 1610 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1611 | AppendToBuffer(",0x%x", imm); |
| 1612 | data += 2; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1613 | } else if (*data == 0x0F) { |
| 1614 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1615 | if (*data == 0x38) { |
| 1616 | data++; |
| 1617 | if (*data == 0x17) { |
| 1618 | data++; |
| 1619 | int mod, regop, rm; |
| 1620 | get_modrm(*data, &mod, ®op, &rm); |
| 1621 | AppendToBuffer("ptest %s,%s", |
| 1622 | NameOfXMMRegister(regop), |
| 1623 | NameOfXMMRegister(rm)); |
| 1624 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1625 | } else if (*data == 0x2A) { |
| 1626 | // movntdqa |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1627 | UnimplementedInstruction(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1628 | } else { |
| 1629 | UnimplementedInstruction(); |
| 1630 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1631 | } else if (*data == 0x3A) { |
| 1632 | data++; |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1633 | if (*data == 0x0B) { |
| 1634 | data++; |
| 1635 | int mod, regop, rm; |
| 1636 | get_modrm(*data, &mod, ®op, &rm); |
| 1637 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1638 | AppendToBuffer("roundsd %s,%s,%d", |
| 1639 | NameOfXMMRegister(regop), |
| 1640 | NameOfXMMRegister(rm), |
| 1641 | static_cast<int>(imm8)); |
| 1642 | data += 2; |
| 1643 | } else if (*data == 0x16) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1644 | data++; |
| 1645 | int mod, regop, rm; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1646 | get_modrm(*data, &mod, &rm, ®op); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1647 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1648 | AppendToBuffer("pextrd %s,%s,%d", |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1649 | NameOfCPURegister(regop), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1650 | NameOfXMMRegister(rm), |
| 1651 | static_cast<int>(imm8)); |
| 1652 | data += 2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1653 | } else if (*data == 0x17) { |
| 1654 | data++; |
| 1655 | int mod, regop, rm; |
| 1656 | get_modrm(*data, &mod, ®op, &rm); |
| 1657 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1658 | AppendToBuffer("extractps %s,%s,%d", |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1659 | NameOfCPURegister(rm), |
| 1660 | NameOfXMMRegister(regop), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1661 | static_cast<int>(imm8)); |
| 1662 | data += 2; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1663 | } else if (*data == 0x22) { |
| 1664 | data++; |
| 1665 | int mod, regop, rm; |
| 1666 | get_modrm(*data, &mod, ®op, &rm); |
| 1667 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1668 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1669 | NameOfXMMRegister(regop), |
| 1670 | NameOfCPURegister(rm), |
| 1671 | static_cast<int>(imm8)); |
| 1672 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1673 | } else { |
| 1674 | UnimplementedInstruction(); |
| 1675 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1676 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1677 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1678 | data++; |
| 1679 | int mod, regop, rm; |
| 1680 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1681 | if (mod == 0x3) { |
| 1682 | AppendToBuffer("%s %s,%s", mnem, |
| 1683 | NameOfXMMRegister(regop), |
| 1684 | NameOfXMMRegister(rm)); |
| 1685 | data++; |
| 1686 | } else { |
| 1687 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1688 | data += PrintRightOperand(data); |
| 1689 | } |
| 1690 | } else if (*data == 0x50) { |
| 1691 | data++; |
| 1692 | int mod, regop, rm; |
| 1693 | get_modrm(*data, &mod, ®op, &rm); |
| 1694 | AppendToBuffer("movmskpd %s,%s", |
| 1695 | NameOfCPURegister(regop), |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1696 | NameOfXMMRegister(rm)); |
| 1697 | data++; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1698 | } else if (*data == 0x54) { |
| 1699 | data++; |
| 1700 | int mod, regop, rm; |
| 1701 | get_modrm(*data, &mod, ®op, &rm); |
| 1702 | AppendToBuffer("andpd %s,%s", |
| 1703 | NameOfXMMRegister(regop), |
| 1704 | NameOfXMMRegister(rm)); |
| 1705 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1706 | } else if (*data == 0x56) { |
| 1707 | data++; |
| 1708 | int mod, regop, rm; |
| 1709 | get_modrm(*data, &mod, ®op, &rm); |
| 1710 | AppendToBuffer("orpd %s,%s", |
| 1711 | NameOfXMMRegister(regop), |
| 1712 | NameOfXMMRegister(rm)); |
| 1713 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1714 | } else if (*data == 0x57) { |
| 1715 | data++; |
| 1716 | int mod, regop, rm; |
| 1717 | get_modrm(*data, &mod, ®op, &rm); |
| 1718 | AppendToBuffer("xorpd %s,%s", |
| 1719 | NameOfXMMRegister(regop), |
| 1720 | NameOfXMMRegister(rm)); |
| 1721 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1722 | } else if (*data == 0x6E) { |
| 1723 | data++; |
| 1724 | int mod, regop, rm; |
| 1725 | get_modrm(*data, &mod, ®op, &rm); |
| 1726 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1727 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1728 | } else if (*data == 0x6F) { |
| 1729 | data++; |
| 1730 | int mod, regop, rm; |
| 1731 | get_modrm(*data, &mod, ®op, &rm); |
| 1732 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1733 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1734 | } else if (*data == 0x70) { |
| 1735 | data++; |
| 1736 | int mod, regop, rm; |
| 1737 | get_modrm(*data, &mod, ®op, &rm); |
| 1738 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1739 | AppendToBuffer("pshufd %s,%s,%d", |
| 1740 | NameOfXMMRegister(regop), |
| 1741 | NameOfXMMRegister(rm), |
| 1742 | static_cast<int>(imm8)); |
| 1743 | data += 2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1744 | } else if (*data == 0x62) { |
| 1745 | data++; |
| 1746 | int mod, regop, rm; |
| 1747 | get_modrm(*data, &mod, ®op, &rm); |
| 1748 | AppendToBuffer("punpckldq %s,%s", NameOfXMMRegister(regop), |
| 1749 | NameOfXMMRegister(rm)); |
| 1750 | data++; |
| 1751 | } else if (*data == 0x6A) { |
| 1752 | data++; |
| 1753 | int mod, regop, rm; |
| 1754 | get_modrm(*data, &mod, ®op, &rm); |
| 1755 | AppendToBuffer("punpckhdq %s,%s", NameOfXMMRegister(regop), |
| 1756 | NameOfXMMRegister(rm)); |
| 1757 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1758 | } else if (*data == 0x76) { |
| 1759 | data++; |
| 1760 | int mod, regop, rm; |
| 1761 | get_modrm(*data, &mod, ®op, &rm); |
| 1762 | AppendToBuffer("pcmpeqd %s,%s", |
| 1763 | NameOfXMMRegister(regop), |
| 1764 | NameOfXMMRegister(rm)); |
| 1765 | data++; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1766 | } else if (*data == 0x90) { |
| 1767 | data++; |
| 1768 | AppendToBuffer("nop"); // 2 byte nop. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1769 | } else if (*data == 0xF3) { |
| 1770 | data++; |
| 1771 | int mod, regop, rm; |
| 1772 | get_modrm(*data, &mod, ®op, &rm); |
| 1773 | AppendToBuffer("psllq %s,%s", |
| 1774 | NameOfXMMRegister(regop), |
| 1775 | NameOfXMMRegister(rm)); |
| 1776 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1777 | } else if (*data == 0x72) { |
| 1778 | data++; |
| 1779 | int mod, regop, rm; |
| 1780 | get_modrm(*data, &mod, ®op, &rm); |
| 1781 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1782 | DCHECK(regop == esi || regop == edx); |
| 1783 | AppendToBuffer("%s %s,%d", (regop == esi) ? "pslld" : "psrld", |
| 1784 | NameOfXMMRegister(rm), static_cast<int>(imm8)); |
| 1785 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1786 | } else if (*data == 0x73) { |
| 1787 | data++; |
| 1788 | int mod, regop, rm; |
| 1789 | get_modrm(*data, &mod, ®op, &rm); |
| 1790 | int8_t imm8 = static_cast<int8_t>(data[1]); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1791 | DCHECK(regop == esi || regop == edx); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1792 | AppendToBuffer("%s %s,%d", |
| 1793 | (regop == esi) ? "psllq" : "psrlq", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1794 | NameOfXMMRegister(rm), |
| 1795 | static_cast<int>(imm8)); |
| 1796 | data += 2; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1797 | } else if (*data == 0xD3) { |
| 1798 | data++; |
| 1799 | int mod, regop, rm; |
| 1800 | get_modrm(*data, &mod, ®op, &rm); |
| 1801 | AppendToBuffer("psrlq %s,%s", |
| 1802 | NameOfXMMRegister(regop), |
| 1803 | NameOfXMMRegister(rm)); |
| 1804 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1805 | } else if (*data == 0x7F) { |
| 1806 | AppendToBuffer("movdqa "); |
| 1807 | data++; |
| 1808 | int mod, regop, rm; |
| 1809 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1810 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1811 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1812 | } else if (*data == 0x7E) { |
| 1813 | data++; |
| 1814 | int mod, regop, rm; |
| 1815 | get_modrm(*data, &mod, ®op, &rm); |
| 1816 | AppendToBuffer("movd "); |
| 1817 | data += PrintRightOperand(data); |
| 1818 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1819 | } else if (*data == 0xDB) { |
| 1820 | data++; |
| 1821 | int mod, regop, rm; |
| 1822 | get_modrm(*data, &mod, ®op, &rm); |
| 1823 | AppendToBuffer("pand %s,%s", |
| 1824 | NameOfXMMRegister(regop), |
| 1825 | NameOfXMMRegister(rm)); |
| 1826 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1827 | } else if (*data == 0xE7) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1828 | data++; |
| 1829 | int mod, regop, rm; |
| 1830 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1831 | if (mod == 3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1832 | // movntdq |
| 1833 | UnimplementedInstruction(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1834 | } else { |
| 1835 | UnimplementedInstruction(); |
| 1836 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1837 | } else if (*data == 0xEF) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1838 | data++; |
| 1839 | int mod, regop, rm; |
| 1840 | get_modrm(*data, &mod, ®op, &rm); |
| 1841 | AppendToBuffer("pxor %s,%s", |
| 1842 | NameOfXMMRegister(regop), |
| 1843 | NameOfXMMRegister(rm)); |
| 1844 | data++; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1845 | } else if (*data == 0xEB) { |
| 1846 | data++; |
| 1847 | int mod, regop, rm; |
| 1848 | get_modrm(*data, &mod, ®op, &rm); |
| 1849 | AppendToBuffer("por %s,%s", |
| 1850 | NameOfXMMRegister(regop), |
| 1851 | NameOfXMMRegister(rm)); |
| 1852 | data++; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1853 | } else { |
| 1854 | UnimplementedInstruction(); |
| 1855 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1856 | } else { |
| 1857 | UnimplementedInstruction(); |
| 1858 | } |
| 1859 | break; |
| 1860 | |
| 1861 | case 0xFE: |
| 1862 | { data++; |
| 1863 | int mod, regop, rm; |
| 1864 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1865 | if (regop == ecx) { |
| 1866 | AppendToBuffer("dec_b "); |
| 1867 | data += PrintRightOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1868 | } else { |
| 1869 | UnimplementedInstruction(); |
| 1870 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1871 | } |
| 1872 | break; |
| 1873 | |
| 1874 | case 0x68: |
| 1875 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1876 | data += 5; |
| 1877 | break; |
| 1878 | |
| 1879 | case 0x6A: |
| 1880 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1881 | data += 2; |
| 1882 | break; |
| 1883 | |
| 1884 | case 0xA8: |
| 1885 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1886 | data += 2; |
| 1887 | break; |
| 1888 | |
| 1889 | case 0xA9: |
| 1890 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1891 | data += 5; |
| 1892 | break; |
| 1893 | |
| 1894 | case 0xD1: // fall through |
| 1895 | case 0xD3: // fall through |
| 1896 | case 0xC1: |
| 1897 | data += D1D3C1Instruction(data); |
| 1898 | break; |
| 1899 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1900 | case 0xD8: // fall through |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1901 | case 0xD9: // fall through |
| 1902 | case 0xDA: // fall through |
| 1903 | case 0xDB: // fall through |
| 1904 | case 0xDC: // fall through |
| 1905 | case 0xDD: // fall through |
| 1906 | case 0xDE: // fall through |
| 1907 | case 0xDF: |
| 1908 | data += FPUInstruction(data); |
| 1909 | break; |
| 1910 | |
| 1911 | case 0xEB: |
| 1912 | data += JumpShort(data); |
| 1913 | break; |
| 1914 | |
| 1915 | case 0xF2: |
| 1916 | if (*(data+1) == 0x0F) { |
| 1917 | byte b2 = *(data+2); |
| 1918 | if (b2 == 0x11) { |
| 1919 | AppendToBuffer("movsd "); |
| 1920 | data += 3; |
| 1921 | int mod, regop, rm; |
| 1922 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1923 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1924 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1925 | } else if (b2 == 0x10) { |
| 1926 | data += 3; |
| 1927 | int mod, regop, rm; |
| 1928 | get_modrm(*data, &mod, ®op, &rm); |
| 1929 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1930 | data += PrintRightXMMOperand(data); |
| 1931 | } else if (b2 == 0x5A) { |
| 1932 | data += 3; |
| 1933 | int mod, regop, rm; |
| 1934 | get_modrm(*data, &mod, ®op, &rm); |
| 1935 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 1936 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1937 | } else { |
| 1938 | const char* mnem = "?"; |
| 1939 | switch (b2) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1940 | case 0x2A: |
| 1941 | mnem = "cvtsi2sd"; |
| 1942 | break; |
| 1943 | case 0x2C: |
| 1944 | mnem = "cvttsd2si"; |
| 1945 | break; |
| 1946 | case 0x2D: |
| 1947 | mnem = "cvtsd2si"; |
| 1948 | break; |
| 1949 | case 0x51: |
| 1950 | mnem = "sqrtsd"; |
| 1951 | break; |
| 1952 | case 0x58: |
| 1953 | mnem = "addsd"; |
| 1954 | break; |
| 1955 | case 0x59: |
| 1956 | mnem = "mulsd"; |
| 1957 | break; |
| 1958 | case 0x5C: |
| 1959 | mnem = "subsd"; |
| 1960 | break; |
| 1961 | case 0x5D: |
| 1962 | mnem = "minsd"; |
| 1963 | break; |
| 1964 | case 0x5E: |
| 1965 | mnem = "divsd"; |
| 1966 | break; |
| 1967 | case 0x5F: |
| 1968 | mnem = "maxsd"; |
| 1969 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1970 | } |
| 1971 | data += 3; |
| 1972 | int mod, regop, rm; |
| 1973 | get_modrm(*data, &mod, ®op, &rm); |
| 1974 | if (b2 == 0x2A) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1975 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1976 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1977 | } else if (b2 == 0x2C || b2 == 0x2D) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1978 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 1979 | data += PrintRightXMMOperand(data); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1980 | } else if (b2 == 0xC2) { |
| 1981 | // Intel manual 2A, Table 3-18. |
| 1982 | const char* const pseudo_op[] = { |
| 1983 | "cmpeqsd", |
| 1984 | "cmpltsd", |
| 1985 | "cmplesd", |
| 1986 | "cmpunordsd", |
| 1987 | "cmpneqsd", |
| 1988 | "cmpnltsd", |
| 1989 | "cmpnlesd", |
| 1990 | "cmpordsd" |
| 1991 | }; |
| 1992 | AppendToBuffer("%s %s,%s", |
| 1993 | pseudo_op[data[1]], |
| 1994 | NameOfXMMRegister(regop), |
| 1995 | NameOfXMMRegister(rm)); |
| 1996 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1997 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1998 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1999 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2000 | } |
| 2001 | } |
| 2002 | } else { |
| 2003 | UnimplementedInstruction(); |
| 2004 | } |
| 2005 | break; |
| 2006 | |
| 2007 | case 0xF3: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2008 | if (*(data+1) == 0x0F) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2009 | byte b2 = *(data+2); |
| 2010 | if (b2 == 0x11) { |
| 2011 | AppendToBuffer("movss "); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2012 | data += 3; |
| 2013 | int mod, regop, rm; |
| 2014 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2015 | data += PrintRightXMMOperand(data); |
| 2016 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 2017 | } else if (b2 == 0x10) { |
| 2018 | data += 3; |
| 2019 | int mod, regop, rm; |
| 2020 | get_modrm(*data, &mod, ®op, &rm); |
| 2021 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 2022 | data += PrintRightXMMOperand(data); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2023 | } else if (b2 == 0x5A) { |
| 2024 | data += 3; |
| 2025 | int mod, regop, rm; |
| 2026 | get_modrm(*data, &mod, ®op, &rm); |
| 2027 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 2028 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2029 | } else if (b2 == 0x6F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2030 | data += 3; |
| 2031 | int mod, regop, rm; |
| 2032 | get_modrm(*data, &mod, ®op, &rm); |
| 2033 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2034 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2035 | } else if (b2 == 0x7F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2036 | AppendToBuffer("movdqu "); |
| 2037 | data += 3; |
| 2038 | int mod, regop, rm; |
| 2039 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2040 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2041 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2042 | } else if (b2 == 0xB8) { |
| 2043 | data += 3; |
| 2044 | int mod, regop, rm; |
| 2045 | get_modrm(*data, &mod, ®op, &rm); |
| 2046 | AppendToBuffer("popcnt %s,", NameOfCPURegister(regop)); |
| 2047 | data += PrintRightOperand(data); |
| 2048 | } else if (b2 == 0xBC) { |
| 2049 | data += 3; |
| 2050 | int mod, regop, rm; |
| 2051 | get_modrm(*data, &mod, ®op, &rm); |
| 2052 | AppendToBuffer("tzcnt %s,", NameOfCPURegister(regop)); |
| 2053 | data += PrintRightOperand(data); |
| 2054 | } else if (b2 == 0xBD) { |
| 2055 | data += 3; |
| 2056 | int mod, regop, rm; |
| 2057 | get_modrm(*data, &mod, ®op, &rm); |
| 2058 | AppendToBuffer("lzcnt %s,", NameOfCPURegister(regop)); |
| 2059 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2060 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2061 | const char* mnem = "?"; |
| 2062 | switch (b2) { |
| 2063 | case 0x2A: |
| 2064 | mnem = "cvtsi2ss"; |
| 2065 | break; |
| 2066 | case 0x2C: |
| 2067 | mnem = "cvttss2si"; |
| 2068 | break; |
| 2069 | case 0x2D: |
| 2070 | mnem = "cvtss2si"; |
| 2071 | break; |
| 2072 | case 0x51: |
| 2073 | mnem = "sqrtss"; |
| 2074 | break; |
| 2075 | case 0x58: |
| 2076 | mnem = "addss"; |
| 2077 | break; |
| 2078 | case 0x59: |
| 2079 | mnem = "mulss"; |
| 2080 | break; |
| 2081 | case 0x5C: |
| 2082 | mnem = "subss"; |
| 2083 | break; |
| 2084 | case 0x5D: |
| 2085 | mnem = "minss"; |
| 2086 | break; |
| 2087 | case 0x5E: |
| 2088 | mnem = "divss"; |
| 2089 | break; |
| 2090 | case 0x5F: |
| 2091 | mnem = "maxss"; |
| 2092 | break; |
| 2093 | } |
| 2094 | data += 3; |
| 2095 | int mod, regop, rm; |
| 2096 | get_modrm(*data, &mod, ®op, &rm); |
| 2097 | if (b2 == 0x2A) { |
| 2098 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2099 | data += PrintRightOperand(data); |
| 2100 | } else if (b2 == 0x2C || b2 == 0x2D) { |
| 2101 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 2102 | data += PrintRightXMMOperand(data); |
| 2103 | } else if (b2 == 0xC2) { |
| 2104 | // Intel manual 2A, Table 3-18. |
| 2105 | const char* const pseudo_op[] = { |
| 2106 | "cmpeqss", "cmpltss", "cmpless", "cmpunordss", |
| 2107 | "cmpneqss", "cmpnltss", "cmpnless", "cmpordss"}; |
| 2108 | AppendToBuffer("%s %s,%s", pseudo_op[data[1]], |
| 2109 | NameOfXMMRegister(regop), NameOfXMMRegister(rm)); |
| 2110 | data += 2; |
| 2111 | } else { |
| 2112 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2113 | data += PrintRightXMMOperand(data); |
| 2114 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2115 | } |
| 2116 | } else if (*(data+1) == 0xA5) { |
| 2117 | data += 2; |
| 2118 | AppendToBuffer("rep_movs"); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2119 | } else if (*(data+1) == 0xAB) { |
| 2120 | data += 2; |
| 2121 | AppendToBuffer("rep_stos"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2122 | } else { |
| 2123 | UnimplementedInstruction(); |
| 2124 | } |
| 2125 | break; |
| 2126 | |
| 2127 | case 0xF7: |
| 2128 | data += F7Instruction(data); |
| 2129 | break; |
| 2130 | |
| 2131 | default: |
| 2132 | UnimplementedInstruction(); |
| 2133 | } |
| 2134 | } |
| 2135 | |
| 2136 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 2137 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 2138 | } |
| 2139 | |
| 2140 | int instr_len = data - instr; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2141 | if (instr_len == 0) { |
| 2142 | printf("%02x", *data); |
| 2143 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2144 | DCHECK(instr_len > 0); // Ensure progress. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2145 | |
| 2146 | int outp = 0; |
| 2147 | // Instruction bytes. |
| 2148 | for (byte* bp = instr; bp < data; bp++) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2149 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2150 | "%02x", |
| 2151 | *bp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2152 | } |
| 2153 | for (int i = 6 - instr_len; i >= 0; i--) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2154 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2155 | } |
| 2156 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2157 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2158 | " %s", |
| 2159 | tmp_buffer_.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2160 | return instr_len; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2161 | } // NOLINT (function is too long) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2162 | |
| 2163 | |
| 2164 | //------------------------------------------------------------------------------ |
| 2165 | |
| 2166 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2167 | static const char* const cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2168 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 2169 | }; |
| 2170 | |
| 2171 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2172 | static const char* const byte_cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2173 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 2174 | }; |
| 2175 | |
| 2176 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2177 | static const char* const xmm_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2178 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 2179 | }; |
| 2180 | |
| 2181 | |
| 2182 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2183 | v8::internal::SNPrintF(tmp_buffer_, "%p", addr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2184 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2185 | } |
| 2186 | |
| 2187 | |
| 2188 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 2189 | return NameOfAddress(addr); |
| 2190 | } |
| 2191 | |
| 2192 | |
| 2193 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 2194 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 2195 | return "noreg"; |
| 2196 | } |
| 2197 | |
| 2198 | |
| 2199 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 2200 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 2201 | return "noreg"; |
| 2202 | } |
| 2203 | |
| 2204 | |
| 2205 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 2206 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 2207 | return "noxmmreg"; |
| 2208 | } |
| 2209 | |
| 2210 | |
| 2211 | const char* NameConverter::NameInCode(byte* addr) const { |
| 2212 | // IA32 does not embed debug strings at the moment. |
| 2213 | UNREACHABLE(); |
| 2214 | return ""; |
| 2215 | } |
| 2216 | |
| 2217 | |
| 2218 | //------------------------------------------------------------------------------ |
| 2219 | |
| 2220 | Disassembler::Disassembler(const NameConverter& converter) |
| 2221 | : converter_(converter) {} |
| 2222 | |
| 2223 | |
| 2224 | Disassembler::~Disassembler() {} |
| 2225 | |
| 2226 | |
| 2227 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 2228 | byte* instruction) { |
| 2229 | DisassemblerIA32 d(converter_, false /*do not crash if unimplemented*/); |
| 2230 | return d.InstructionDecode(buffer, instruction); |
| 2231 | } |
| 2232 | |
| 2233 | |
| 2234 | // The IA-32 assembler does not currently use constant pools. |
| 2235 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 2236 | |
| 2237 | |
| 2238 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 2239 | NameConverter converter; |
| 2240 | Disassembler d(converter); |
| 2241 | for (byte* pc = begin; pc < end;) { |
| 2242 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 2243 | buffer[0] = '\0'; |
| 2244 | byte* prev_pc = pc; |
| 2245 | pc += d.InstructionDecode(buffer, pc); |
| 2246 | fprintf(f, "%p", prev_pc); |
| 2247 | fprintf(f, " "); |
| 2248 | |
| 2249 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 2250 | fprintf(f, "%02x", *bp); |
| 2251 | } |
| 2252 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 2253 | fprintf(f, " "); |
| 2254 | } |
| 2255 | fprintf(f, " %s\n", buffer.start()); |
| 2256 | } |
| 2257 | } |
| 2258 | |
| 2259 | |
| 2260 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2261 | |
| 2262 | #endif // V8_TARGET_ARCH_IA32 |