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 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 31 | static const ByteMnemonic two_operands_instr[] = { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 32 | {0x01, "add", OPER_REG_OP_ORDER}, {0x03, "add", REG_OPER_OP_ORDER}, |
| 33 | {0x09, "or", OPER_REG_OP_ORDER}, {0x0B, "or", REG_OPER_OP_ORDER}, |
| 34 | {0x13, "adc", REG_OPER_OP_ORDER}, {0x1B, "sbb", REG_OPER_OP_ORDER}, |
| 35 | {0x21, "and", OPER_REG_OP_ORDER}, {0x23, "and", REG_OPER_OP_ORDER}, |
| 36 | {0x29, "sub", OPER_REG_OP_ORDER}, {0x2A, "subb", REG_OPER_OP_ORDER}, |
| 37 | {0x2B, "sub", REG_OPER_OP_ORDER}, {0x31, "xor", OPER_REG_OP_ORDER}, |
| 38 | {0x33, "xor", REG_OPER_OP_ORDER}, {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 39 | {0x39, "cmp", OPER_REG_OP_ORDER}, {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 40 | {0x3B, "cmp", REG_OPER_OP_ORDER}, {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 41 | {0x85, "test", REG_OPER_OP_ORDER}, {0x87, "xchg", REG_OPER_OP_ORDER}, |
| 42 | {0x8A, "mov_b", REG_OPER_OP_ORDER}, {0x8B, "mov", REG_OPER_OP_ORDER}, |
| 43 | {0x8D, "lea", REG_OPER_OP_ORDER}, {-1, "", UNSET_OP_ORDER}}; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 44 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 45 | static const ByteMnemonic zero_operands_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 46 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 47 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 48 | {0x90, "nop", UNSET_OP_ORDER}, |
| 49 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 50 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 51 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 52 | {0x61, "popad", UNSET_OP_ORDER}, |
| 53 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 54 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 55 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 56 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 57 | {0x9B, "fwait", UNSET_OP_ORDER}, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 58 | {0xFC, "cld", UNSET_OP_ORDER}, |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 59 | {0xAB, "stos", UNSET_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 60 | {-1, "", UNSET_OP_ORDER} |
| 61 | }; |
| 62 | |
| 63 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 64 | static const ByteMnemonic call_jump_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 65 | {0xE8, "call", UNSET_OP_ORDER}, |
| 66 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 67 | {-1, "", UNSET_OP_ORDER} |
| 68 | }; |
| 69 | |
| 70 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 71 | static const ByteMnemonic short_immediate_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | {0x05, "add", UNSET_OP_ORDER}, |
| 73 | {0x0D, "or", UNSET_OP_ORDER}, |
| 74 | {0x15, "adc", UNSET_OP_ORDER}, |
| 75 | {0x25, "and", UNSET_OP_ORDER}, |
| 76 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 77 | {0x35, "xor", UNSET_OP_ORDER}, |
| 78 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 79 | {-1, "", UNSET_OP_ORDER} |
| 80 | }; |
| 81 | |
| 82 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 83 | // Generally we don't want to generate these because they are subject to partial |
| 84 | // register stalls. They are included for completeness and because the cmp |
| 85 | // variant is used by the RecordWrite stub. Because it does not update the |
| 86 | // register it is not subject to partial register stalls. |
| 87 | static ByteMnemonic byte_immediate_instr[] = { |
| 88 | {0x0c, "or", UNSET_OP_ORDER}, |
| 89 | {0x24, "and", UNSET_OP_ORDER}, |
| 90 | {0x34, "xor", UNSET_OP_ORDER}, |
| 91 | {0x3c, "cmp", UNSET_OP_ORDER}, |
| 92 | {-1, "", UNSET_OP_ORDER} |
| 93 | }; |
| 94 | |
| 95 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 96 | static const char* const jump_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 97 | /*0*/ "jo", "jno", "jc", "jnc", |
| 98 | /*4*/ "jz", "jnz", "jna", "ja", |
| 99 | /*8*/ "js", "jns", "jpe", "jpo", |
| 100 | /*12*/ "jl", "jnl", "jng", "jg" |
| 101 | }; |
| 102 | |
| 103 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 104 | static const char* const set_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 105 | /*0*/ "seto", "setno", "setc", "setnc", |
| 106 | /*4*/ "setz", "setnz", "setna", "seta", |
| 107 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 108 | /*12*/ "setl", "setnl", "setng", "setg" |
| 109 | }; |
| 110 | |
| 111 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 112 | static const char* const conditional_move_mnem[] = { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 113 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 114 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 115 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 116 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 117 | }; |
| 118 | |
| 119 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 120 | enum InstructionType { |
| 121 | NO_INSTR, |
| 122 | ZERO_OPERANDS_INSTR, |
| 123 | TWO_OPERANDS_INSTR, |
| 124 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 125 | REGISTER_INSTR, |
| 126 | MOVE_REG_INSTR, |
| 127 | CALL_JUMP_INSTR, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 128 | SHORT_IMMEDIATE_INSTR, |
| 129 | BYTE_IMMEDIATE_INSTR |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 130 | }; |
| 131 | |
| 132 | |
| 133 | struct InstructionDesc { |
| 134 | const char* mnem; |
| 135 | InstructionType type; |
| 136 | OperandOrder op_order_; |
| 137 | }; |
| 138 | |
| 139 | |
| 140 | class InstructionTable { |
| 141 | public: |
| 142 | InstructionTable(); |
| 143 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 144 | static InstructionTable* get_instance() { |
| 145 | static InstructionTable table; |
| 146 | return &table; |
| 147 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 148 | |
| 149 | private: |
| 150 | InstructionDesc instructions_[256]; |
| 151 | void Clear(); |
| 152 | void Init(); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 153 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 154 | void SetTableRange(InstructionType type, |
| 155 | byte start, |
| 156 | byte end, |
| 157 | const char* mnem); |
| 158 | void AddJumpConditionalShort(); |
| 159 | }; |
| 160 | |
| 161 | |
| 162 | InstructionTable::InstructionTable() { |
| 163 | Clear(); |
| 164 | Init(); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | void InstructionTable::Clear() { |
| 169 | for (int i = 0; i < 256; i++) { |
| 170 | instructions_[i].mnem = ""; |
| 171 | instructions_[i].type = NO_INSTR; |
| 172 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | |
| 177 | void InstructionTable::Init() { |
| 178 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 179 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 180 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 181 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 182 | CopyTable(byte_immediate_instr, BYTE_IMMEDIATE_INSTR); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 183 | AddJumpConditionalShort(); |
| 184 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 185 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 186 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 187 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 188 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 189 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 190 | } |
| 191 | |
| 192 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 193 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 194 | InstructionType type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 195 | for (int i = 0; bm[i].b >= 0; i++) { |
| 196 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 197 | id->mnem = bm[i].mnem; |
| 198 | id->op_order_ = bm[i].op_order_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 199 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 200 | id->type = type; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | |
| 205 | void InstructionTable::SetTableRange(InstructionType type, |
| 206 | byte start, |
| 207 | byte end, |
| 208 | const char* mnem) { |
| 209 | for (byte b = start; b <= end; b++) { |
| 210 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 211 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 212 | id->mnem = mnem; |
| 213 | id->type = type; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | |
| 218 | void InstructionTable::AddJumpConditionalShort() { |
| 219 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 220 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 221 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 222 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 223 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 228 | // The IA32 disassembler implementation. |
| 229 | class DisassemblerIA32 { |
| 230 | public: |
| 231 | DisassemblerIA32(const NameConverter& converter, |
| 232 | bool abort_on_unimplemented = true) |
| 233 | : converter_(converter), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 234 | vex_byte0_(0), |
| 235 | vex_byte1_(0), |
| 236 | vex_byte2_(0), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 237 | instruction_table_(InstructionTable::get_instance()), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 238 | tmp_buffer_pos_(0), |
| 239 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 240 | tmp_buffer_[0] = '\0'; |
| 241 | } |
| 242 | |
| 243 | virtual ~DisassemblerIA32() {} |
| 244 | |
| 245 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 246 | // Returns the length of the disassembled machine instruction in bytes. |
| 247 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 248 | |
| 249 | private: |
| 250 | const NameConverter& converter_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 251 | byte vex_byte0_; // 0xc4 or 0xc5 |
| 252 | byte vex_byte1_; |
| 253 | byte vex_byte2_; // only for 3 bytes vex prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 254 | InstructionTable* instruction_table_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 255 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 256 | unsigned int tmp_buffer_pos_; |
| 257 | bool abort_on_unimplemented_; |
| 258 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 259 | enum { |
| 260 | eax = 0, |
| 261 | ecx = 1, |
| 262 | edx = 2, |
| 263 | ebx = 3, |
| 264 | esp = 4, |
| 265 | ebp = 5, |
| 266 | esi = 6, |
| 267 | edi = 7 |
| 268 | }; |
| 269 | |
| 270 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 271 | enum ShiftOpcodeExtension { |
| 272 | kROL = 0, |
| 273 | kROR = 1, |
| 274 | kRCL = 2, |
| 275 | kRCR = 3, |
| 276 | kSHL = 4, |
| 277 | KSHR = 5, |
| 278 | kSAR = 7 |
| 279 | }; |
| 280 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 281 | bool vex_128() { |
| 282 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 283 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 284 | return (checked & 4) != 1; |
| 285 | } |
| 286 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 287 | bool vex_none() { |
| 288 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 289 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 290 | return (checked & 3) == 0; |
| 291 | } |
| 292 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 293 | bool vex_66() { |
| 294 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 295 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 296 | return (checked & 3) == 1; |
| 297 | } |
| 298 | |
| 299 | bool vex_f3() { |
| 300 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 301 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 302 | return (checked & 3) == 2; |
| 303 | } |
| 304 | |
| 305 | bool vex_f2() { |
| 306 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 307 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 308 | return (checked & 3) == 3; |
| 309 | } |
| 310 | |
| 311 | bool vex_w() { |
| 312 | if (vex_byte0_ == 0xc5) return false; |
| 313 | return (vex_byte2_ & 0x80) != 0; |
| 314 | } |
| 315 | |
| 316 | bool vex_0f() { |
| 317 | if (vex_byte0_ == 0xc5) return true; |
| 318 | return (vex_byte1_ & 3) == 1; |
| 319 | } |
| 320 | |
| 321 | bool vex_0f38() { |
| 322 | if (vex_byte0_ == 0xc5) return false; |
| 323 | return (vex_byte1_ & 3) == 2; |
| 324 | } |
| 325 | |
| 326 | bool vex_0f3a() { |
| 327 | if (vex_byte0_ == 0xc5) return false; |
| 328 | return (vex_byte1_ & 3) == 3; |
| 329 | } |
| 330 | |
| 331 | int vex_vreg() { |
| 332 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 333 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 334 | return ~(checked >> 3) & 0xf; |
| 335 | } |
| 336 | |
| 337 | char float_size_code() { return "sd"[vex_w()]; } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 338 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 339 | const char* NameOfCPURegister(int reg) const { |
| 340 | return converter_.NameOfCPURegister(reg); |
| 341 | } |
| 342 | |
| 343 | |
| 344 | const char* NameOfByteCPURegister(int reg) const { |
| 345 | return converter_.NameOfByteCPURegister(reg); |
| 346 | } |
| 347 | |
| 348 | |
| 349 | const char* NameOfXMMRegister(int reg) const { |
| 350 | return converter_.NameOfXMMRegister(reg); |
| 351 | } |
| 352 | |
| 353 | |
| 354 | const char* NameOfAddress(byte* addr) const { |
| 355 | return converter_.NameOfAddress(addr); |
| 356 | } |
| 357 | |
| 358 | |
| 359 | // Disassembler helper functions. |
| 360 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 361 | *mod = (data >> 6) & 3; |
| 362 | *regop = (data & 0x38) >> 3; |
| 363 | *rm = data & 7; |
| 364 | } |
| 365 | |
| 366 | |
| 367 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 368 | *scale = (data >> 6) & 3; |
| 369 | *index = (data >> 3) & 7; |
| 370 | *base = data & 7; |
| 371 | } |
| 372 | |
| 373 | typedef const char* (DisassemblerIA32::*RegisterNameMapping)(int reg) const; |
| 374 | |
| 375 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 376 | int PrintRightOperand(byte* modrmp); |
| 377 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 378 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 379 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 380 | int PrintImmediateOp(byte* data); |
| 381 | int F7Instruction(byte* data); |
| 382 | int D1D3C1Instruction(byte* data); |
| 383 | int JumpShort(byte* data); |
| 384 | int JumpConditional(byte* data, const char* comment); |
| 385 | int JumpConditionalShort(byte* data, const char* comment); |
| 386 | int SetCC(byte* data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 387 | int CMov(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 388 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 389 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 390 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 391 | int AVXInstruction(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 392 | void AppendToBuffer(const char* format, ...); |
| 393 | |
| 394 | |
| 395 | void UnimplementedInstruction() { |
| 396 | if (abort_on_unimplemented_) { |
| 397 | UNIMPLEMENTED(); |
| 398 | } else { |
| 399 | AppendToBuffer("'Unimplemented Instruction'"); |
| 400 | } |
| 401 | } |
| 402 | }; |
| 403 | |
| 404 | |
| 405 | void DisassemblerIA32::AppendToBuffer(const char* format, ...) { |
| 406 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 407 | va_list args; |
| 408 | va_start(args, format); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 409 | int result = v8::internal::VSNPrintF(buf, format, args); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 410 | va_end(args); |
| 411 | tmp_buffer_pos_ += result; |
| 412 | } |
| 413 | |
| 414 | int DisassemblerIA32::PrintRightOperandHelper( |
| 415 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 416 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 417 | int mod, regop, rm; |
| 418 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 419 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 420 | &DisassemblerIA32::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 421 | switch (mod) { |
| 422 | case 0: |
| 423 | if (rm == ebp) { |
| 424 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 425 | AppendToBuffer("[0x%x]", disp); |
| 426 | return 5; |
| 427 | } else if (rm == esp) { |
| 428 | byte sib = *(modrmp + 1); |
| 429 | int scale, index, base; |
| 430 | get_sib(sib, &scale, &index, &base); |
| 431 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 432 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 433 | return 2; |
| 434 | } else if (base == ebp) { |
| 435 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 436 | AppendToBuffer("[%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 437 | (this->*register_name)(index), |
| 438 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 439 | disp < 0 ? "-" : "+", |
| 440 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 441 | return 6; |
| 442 | } else if (index != esp && base != ebp) { |
| 443 | // [base+index*scale] |
| 444 | AppendToBuffer("[%s+%s*%d]", |
| 445 | (this->*register_name)(base), |
| 446 | (this->*register_name)(index), |
| 447 | 1 << scale); |
| 448 | return 2; |
| 449 | } else { |
| 450 | UnimplementedInstruction(); |
| 451 | return 1; |
| 452 | } |
| 453 | } else { |
| 454 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 455 | return 1; |
| 456 | } |
| 457 | break; |
| 458 | case 1: // fall through |
| 459 | case 2: |
| 460 | if (rm == esp) { |
| 461 | byte sib = *(modrmp + 1); |
| 462 | int scale, index, base; |
| 463 | get_sib(sib, &scale, &index, &base); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 464 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) |
| 465 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 466 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 467 | AppendToBuffer("[%s%s0x%x]", |
| 468 | (this->*register_name)(rm), |
| 469 | disp < 0 ? "-" : "+", |
| 470 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 471 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 472 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 473 | (this->*register_name)(base), |
| 474 | (this->*register_name)(index), |
| 475 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 476 | disp < 0 ? "-" : "+", |
| 477 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 478 | } |
| 479 | return mod == 2 ? 6 : 3; |
| 480 | } else { |
| 481 | // No sib. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 482 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) |
| 483 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 484 | AppendToBuffer("[%s%s0x%x]", |
| 485 | (this->*register_name)(rm), |
| 486 | disp < 0 ? "-" : "+", |
| 487 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 488 | return mod == 2 ? 5 : 2; |
| 489 | } |
| 490 | break; |
| 491 | case 3: |
| 492 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 493 | return 1; |
| 494 | default: |
| 495 | UnimplementedInstruction(); |
| 496 | return 1; |
| 497 | } |
| 498 | UNREACHABLE(); |
| 499 | } |
| 500 | |
| 501 | |
| 502 | int DisassemblerIA32::PrintRightOperand(byte* modrmp) { |
| 503 | return PrintRightOperandHelper(modrmp, &DisassemblerIA32::NameOfCPURegister); |
| 504 | } |
| 505 | |
| 506 | |
| 507 | int DisassemblerIA32::PrintRightByteOperand(byte* modrmp) { |
| 508 | return PrintRightOperandHelper(modrmp, |
| 509 | &DisassemblerIA32::NameOfByteCPURegister); |
| 510 | } |
| 511 | |
| 512 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 513 | int DisassemblerIA32::PrintRightXMMOperand(byte* modrmp) { |
| 514 | return PrintRightOperandHelper(modrmp, |
| 515 | &DisassemblerIA32::NameOfXMMRegister); |
| 516 | } |
| 517 | |
| 518 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 519 | // Returns number of bytes used including the current *data. |
| 520 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 521 | int DisassemblerIA32::PrintOperands(const char* mnem, |
| 522 | OperandOrder op_order, |
| 523 | byte* data) { |
| 524 | byte modrm = *data; |
| 525 | int mod, regop, rm; |
| 526 | get_modrm(modrm, &mod, ®op, &rm); |
| 527 | int advance = 0; |
| 528 | switch (op_order) { |
| 529 | case REG_OPER_OP_ORDER: { |
| 530 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 531 | advance = PrintRightOperand(data); |
| 532 | break; |
| 533 | } |
| 534 | case OPER_REG_OP_ORDER: { |
| 535 | AppendToBuffer("%s ", mnem); |
| 536 | advance = PrintRightOperand(data); |
| 537 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 538 | break; |
| 539 | } |
| 540 | default: |
| 541 | UNREACHABLE(); |
| 542 | break; |
| 543 | } |
| 544 | return advance; |
| 545 | } |
| 546 | |
| 547 | |
| 548 | // Returns number of bytes used by machine instruction, including *data byte. |
| 549 | // Writes immediate instructions to 'tmp_buffer_'. |
| 550 | int DisassemblerIA32::PrintImmediateOp(byte* data) { |
| 551 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 552 | byte modrm = *(data+1); |
| 553 | int mod, regop, rm; |
| 554 | get_modrm(modrm, &mod, ®op, &rm); |
| 555 | const char* mnem = "Imm???"; |
| 556 | switch (regop) { |
| 557 | case 0: mnem = "add"; break; |
| 558 | case 1: mnem = "or"; break; |
| 559 | case 2: mnem = "adc"; break; |
| 560 | case 4: mnem = "and"; break; |
| 561 | case 5: mnem = "sub"; break; |
| 562 | case 6: mnem = "xor"; break; |
| 563 | case 7: mnem = "cmp"; break; |
| 564 | default: UnimplementedInstruction(); |
| 565 | } |
| 566 | AppendToBuffer("%s ", mnem); |
| 567 | int count = PrintRightOperand(data+1); |
| 568 | if (sign_extension_bit) { |
| 569 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 570 | return 1 + count + 1 /*int8*/; |
| 571 | } else { |
| 572 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 573 | return 1 + count + 4 /*int32_t*/; |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | |
| 578 | // Returns number of bytes used, including *data. |
| 579 | int DisassemblerIA32::F7Instruction(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 580 | DCHECK_EQ(0xF7, *data); |
| 581 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 582 | int mod, regop, rm; |
| 583 | get_modrm(modrm, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 584 | const char* mnem = NULL; |
| 585 | switch (regop) { |
| 586 | case 0: |
| 587 | mnem = "test"; |
| 588 | break; |
| 589 | case 2: |
| 590 | mnem = "not"; |
| 591 | break; |
| 592 | case 3: |
| 593 | mnem = "neg"; |
| 594 | break; |
| 595 | case 4: |
| 596 | mnem = "mul"; |
| 597 | break; |
| 598 | case 5: |
| 599 | mnem = "imul"; |
| 600 | break; |
| 601 | case 6: |
| 602 | mnem = "div"; |
| 603 | break; |
| 604 | case 7: |
| 605 | mnem = "idiv"; |
| 606 | break; |
| 607 | default: |
| 608 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 609 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 610 | AppendToBuffer("%s ", mnem); |
| 611 | int count = PrintRightOperand(data); |
| 612 | if (regop == 0) { |
| 613 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + count)); |
| 614 | count += 4; |
| 615 | } |
| 616 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 617 | } |
| 618 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 619 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 620 | int DisassemblerIA32::D1D3C1Instruction(byte* data) { |
| 621 | byte op = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 622 | DCHECK(op == 0xD1 || op == 0xD3 || op == 0xC1); |
| 623 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 624 | int mod, regop, rm; |
| 625 | get_modrm(modrm, &mod, ®op, &rm); |
| 626 | int imm8 = -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 627 | const char* mnem = NULL; |
| 628 | switch (regop) { |
| 629 | case kROL: |
| 630 | mnem = "rol"; |
| 631 | break; |
| 632 | case kROR: |
| 633 | mnem = "ror"; |
| 634 | break; |
| 635 | case kRCL: |
| 636 | mnem = "rcl"; |
| 637 | break; |
| 638 | case kRCR: |
| 639 | mnem = "rcr"; |
| 640 | break; |
| 641 | case kSHL: |
| 642 | mnem = "shl"; |
| 643 | break; |
| 644 | case KSHR: |
| 645 | mnem = "shr"; |
| 646 | break; |
| 647 | case kSAR: |
| 648 | mnem = "sar"; |
| 649 | break; |
| 650 | default: |
| 651 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 652 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 653 | AppendToBuffer("%s ", mnem); |
| 654 | int count = PrintRightOperand(data); |
| 655 | if (op == 0xD1) { |
| 656 | imm8 = 1; |
| 657 | } else if (op == 0xC1) { |
| 658 | imm8 = *(data + 1); |
| 659 | count++; |
| 660 | } else if (op == 0xD3) { |
| 661 | // Shift/rotate by cl. |
| 662 | } |
| 663 | if (imm8 >= 0) { |
| 664 | AppendToBuffer(",%d", imm8); |
| 665 | } else { |
| 666 | AppendToBuffer(",cl"); |
| 667 | } |
| 668 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | |
| 672 | // Returns number of bytes used, including *data. |
| 673 | int DisassemblerIA32::JumpShort(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 674 | DCHECK_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 675 | byte b = *(data+1); |
| 676 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 677 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 678 | return 2; |
| 679 | } |
| 680 | |
| 681 | |
| 682 | // Returns number of bytes used, including *data. |
| 683 | int DisassemblerIA32::JumpConditional(byte* data, const char* comment) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 684 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 685 | byte cond = *(data+1) & 0x0F; |
| 686 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 687 | const char* mnem = jump_conditional_mnem[cond]; |
| 688 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 689 | if (comment != NULL) { |
| 690 | AppendToBuffer(", %s", comment); |
| 691 | } |
| 692 | return 6; // includes 0x0F |
| 693 | } |
| 694 | |
| 695 | |
| 696 | // Returns number of bytes used, including *data. |
| 697 | int DisassemblerIA32::JumpConditionalShort(byte* data, const char* comment) { |
| 698 | byte cond = *data & 0x0F; |
| 699 | byte b = *(data+1); |
| 700 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 701 | const char* mnem = jump_conditional_mnem[cond]; |
| 702 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 703 | if (comment != NULL) { |
| 704 | AppendToBuffer(", %s", comment); |
| 705 | } |
| 706 | return 2; |
| 707 | } |
| 708 | |
| 709 | |
| 710 | // Returns number of bytes used, including *data. |
| 711 | int DisassemblerIA32::SetCC(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 712 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 713 | byte cond = *(data+1) & 0x0F; |
| 714 | const char* mnem = set_conditional_mnem[cond]; |
| 715 | AppendToBuffer("%s ", mnem); |
| 716 | PrintRightByteOperand(data+2); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 717 | return 3; // Includes 0x0F. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | |
| 721 | // Returns number of bytes used, including *data. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 722 | int DisassemblerIA32::CMov(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 723 | DCHECK_EQ(0x0F, *data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 724 | byte cond = *(data + 1) & 0x0F; |
| 725 | const char* mnem = conditional_move_mnem[cond]; |
| 726 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 727 | return 2 + op_size; // includes 0x0F |
| 728 | } |
| 729 | |
| 730 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 731 | int DisassemblerIA32::AVXInstruction(byte* data) { |
| 732 | byte opcode = *data; |
| 733 | byte* current = data + 1; |
| 734 | if (vex_66() && vex_0f38()) { |
| 735 | int mod, regop, rm, vvvv = vex_vreg(); |
| 736 | get_modrm(*current, &mod, ®op, &rm); |
| 737 | switch (opcode) { |
| 738 | case 0x99: |
| 739 | AppendToBuffer("vfmadd132s%c %s,%s,", float_size_code(), |
| 740 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 741 | current += PrintRightXMMOperand(current); |
| 742 | break; |
| 743 | case 0xa9: |
| 744 | AppendToBuffer("vfmadd213s%c %s,%s,", float_size_code(), |
| 745 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 746 | current += PrintRightXMMOperand(current); |
| 747 | break; |
| 748 | case 0xb9: |
| 749 | AppendToBuffer("vfmadd231s%c %s,%s,", float_size_code(), |
| 750 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 751 | current += PrintRightXMMOperand(current); |
| 752 | break; |
| 753 | case 0x9b: |
| 754 | AppendToBuffer("vfmsub132s%c %s,%s,", float_size_code(), |
| 755 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 756 | current += PrintRightXMMOperand(current); |
| 757 | break; |
| 758 | case 0xab: |
| 759 | AppendToBuffer("vfmsub213s%c %s,%s,", float_size_code(), |
| 760 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 761 | current += PrintRightXMMOperand(current); |
| 762 | break; |
| 763 | case 0xbb: |
| 764 | AppendToBuffer("vfmsub231s%c %s,%s,", float_size_code(), |
| 765 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 766 | current += PrintRightXMMOperand(current); |
| 767 | break; |
| 768 | case 0x9d: |
| 769 | AppendToBuffer("vfnmadd132s%c %s,%s,", float_size_code(), |
| 770 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 771 | current += PrintRightXMMOperand(current); |
| 772 | break; |
| 773 | case 0xad: |
| 774 | AppendToBuffer("vfnmadd213s%c %s,%s,", float_size_code(), |
| 775 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 776 | current += PrintRightXMMOperand(current); |
| 777 | break; |
| 778 | case 0xbd: |
| 779 | AppendToBuffer("vfnmadd231s%c %s,%s,", float_size_code(), |
| 780 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 781 | current += PrintRightXMMOperand(current); |
| 782 | break; |
| 783 | case 0x9f: |
| 784 | AppendToBuffer("vfnmsub132s%c %s,%s,", float_size_code(), |
| 785 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 786 | current += PrintRightXMMOperand(current); |
| 787 | break; |
| 788 | case 0xaf: |
| 789 | AppendToBuffer("vfnmsub213s%c %s,%s,", float_size_code(), |
| 790 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 791 | current += PrintRightXMMOperand(current); |
| 792 | break; |
| 793 | case 0xbf: |
| 794 | AppendToBuffer("vfnmsub231s%c %s,%s,", float_size_code(), |
| 795 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 796 | current += PrintRightXMMOperand(current); |
| 797 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 798 | case 0xf7: |
| 799 | AppendToBuffer("shlx %s,", NameOfCPURegister(regop)); |
| 800 | current += PrintRightOperand(current); |
| 801 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 802 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 803 | default: |
| 804 | UnimplementedInstruction(); |
| 805 | } |
| 806 | } else if (vex_f2() && vex_0f()) { |
| 807 | int mod, regop, rm, vvvv = vex_vreg(); |
| 808 | get_modrm(*current, &mod, ®op, &rm); |
| 809 | switch (opcode) { |
| 810 | case 0x58: |
| 811 | AppendToBuffer("vaddsd %s,%s,", NameOfXMMRegister(regop), |
| 812 | NameOfXMMRegister(vvvv)); |
| 813 | current += PrintRightXMMOperand(current); |
| 814 | break; |
| 815 | case 0x59: |
| 816 | AppendToBuffer("vmulsd %s,%s,", NameOfXMMRegister(regop), |
| 817 | NameOfXMMRegister(vvvv)); |
| 818 | current += PrintRightXMMOperand(current); |
| 819 | break; |
| 820 | case 0x5c: |
| 821 | AppendToBuffer("vsubsd %s,%s,", NameOfXMMRegister(regop), |
| 822 | NameOfXMMRegister(vvvv)); |
| 823 | current += PrintRightXMMOperand(current); |
| 824 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 825 | case 0x5d: |
| 826 | AppendToBuffer("vminsd %s,%s,", NameOfXMMRegister(regop), |
| 827 | NameOfXMMRegister(vvvv)); |
| 828 | current += PrintRightXMMOperand(current); |
| 829 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 830 | case 0x5e: |
| 831 | AppendToBuffer("vdivsd %s,%s,", NameOfXMMRegister(regop), |
| 832 | NameOfXMMRegister(vvvv)); |
| 833 | current += PrintRightXMMOperand(current); |
| 834 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 835 | case 0x5f: |
| 836 | AppendToBuffer("vmaxsd %s,%s,", NameOfXMMRegister(regop), |
| 837 | NameOfXMMRegister(vvvv)); |
| 838 | current += PrintRightXMMOperand(current); |
| 839 | break; |
| 840 | default: |
| 841 | UnimplementedInstruction(); |
| 842 | } |
| 843 | } else if (vex_f3() && vex_0f()) { |
| 844 | int mod, regop, rm, vvvv = vex_vreg(); |
| 845 | get_modrm(*current, &mod, ®op, &rm); |
| 846 | switch (opcode) { |
| 847 | case 0x58: |
| 848 | AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop), |
| 849 | NameOfXMMRegister(vvvv)); |
| 850 | current += PrintRightXMMOperand(current); |
| 851 | break; |
| 852 | case 0x59: |
| 853 | AppendToBuffer("vmulss %s,%s,", NameOfXMMRegister(regop), |
| 854 | NameOfXMMRegister(vvvv)); |
| 855 | current += PrintRightXMMOperand(current); |
| 856 | break; |
| 857 | case 0x5c: |
| 858 | AppendToBuffer("vsubss %s,%s,", NameOfXMMRegister(regop), |
| 859 | NameOfXMMRegister(vvvv)); |
| 860 | current += PrintRightXMMOperand(current); |
| 861 | break; |
| 862 | case 0x5d: |
| 863 | AppendToBuffer("vminss %s,%s,", NameOfXMMRegister(regop), |
| 864 | NameOfXMMRegister(vvvv)); |
| 865 | current += PrintRightXMMOperand(current); |
| 866 | break; |
| 867 | case 0x5e: |
| 868 | AppendToBuffer("vdivss %s,%s,", NameOfXMMRegister(regop), |
| 869 | NameOfXMMRegister(vvvv)); |
| 870 | current += PrintRightXMMOperand(current); |
| 871 | break; |
| 872 | case 0x5f: |
| 873 | AppendToBuffer("vmaxss %s,%s,", NameOfXMMRegister(regop), |
| 874 | NameOfXMMRegister(vvvv)); |
| 875 | current += PrintRightXMMOperand(current); |
| 876 | break; |
| 877 | default: |
| 878 | UnimplementedInstruction(); |
| 879 | } |
| 880 | } else if (vex_none() && vex_0f38()) { |
| 881 | int mod, regop, rm, vvvv = vex_vreg(); |
| 882 | get_modrm(*current, &mod, ®op, &rm); |
| 883 | const char* mnem = "?"; |
| 884 | switch (opcode) { |
| 885 | case 0xf2: |
| 886 | AppendToBuffer("andn %s,%s,", NameOfCPURegister(regop), |
| 887 | NameOfCPURegister(vvvv)); |
| 888 | current += PrintRightOperand(current); |
| 889 | break; |
| 890 | case 0xf5: |
| 891 | AppendToBuffer("bzhi %s,", NameOfCPURegister(regop)); |
| 892 | current += PrintRightOperand(current); |
| 893 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 894 | break; |
| 895 | case 0xf7: |
| 896 | AppendToBuffer("bextr %s,", NameOfCPURegister(regop)); |
| 897 | current += PrintRightOperand(current); |
| 898 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 899 | break; |
| 900 | case 0xf3: |
| 901 | switch (regop) { |
| 902 | case 1: |
| 903 | mnem = "blsr"; |
| 904 | break; |
| 905 | case 2: |
| 906 | mnem = "blsmsk"; |
| 907 | break; |
| 908 | case 3: |
| 909 | mnem = "blsi"; |
| 910 | break; |
| 911 | default: |
| 912 | UnimplementedInstruction(); |
| 913 | } |
| 914 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(vvvv)); |
| 915 | current += PrintRightOperand(current); |
| 916 | mnem = "?"; |
| 917 | break; |
| 918 | default: |
| 919 | UnimplementedInstruction(); |
| 920 | } |
| 921 | } else if (vex_f2() && vex_0f38()) { |
| 922 | int mod, regop, rm, vvvv = vex_vreg(); |
| 923 | get_modrm(*current, &mod, ®op, &rm); |
| 924 | switch (opcode) { |
| 925 | case 0xf5: |
| 926 | AppendToBuffer("pdep %s,%s,", NameOfCPURegister(regop), |
| 927 | NameOfCPURegister(vvvv)); |
| 928 | current += PrintRightOperand(current); |
| 929 | break; |
| 930 | case 0xf6: |
| 931 | AppendToBuffer("mulx %s,%s,", NameOfCPURegister(regop), |
| 932 | NameOfCPURegister(vvvv)); |
| 933 | current += PrintRightOperand(current); |
| 934 | break; |
| 935 | case 0xf7: |
| 936 | AppendToBuffer("shrx %s,", NameOfCPURegister(regop)); |
| 937 | current += PrintRightOperand(current); |
| 938 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 939 | break; |
| 940 | default: |
| 941 | UnimplementedInstruction(); |
| 942 | } |
| 943 | } else if (vex_f3() && vex_0f38()) { |
| 944 | int mod, regop, rm, vvvv = vex_vreg(); |
| 945 | get_modrm(*current, &mod, ®op, &rm); |
| 946 | switch (opcode) { |
| 947 | case 0xf5: |
| 948 | AppendToBuffer("pext %s,%s,", NameOfCPURegister(regop), |
| 949 | NameOfCPURegister(vvvv)); |
| 950 | current += PrintRightOperand(current); |
| 951 | break; |
| 952 | case 0xf7: |
| 953 | AppendToBuffer("sarx %s,", NameOfCPURegister(regop)); |
| 954 | current += PrintRightOperand(current); |
| 955 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 956 | break; |
| 957 | default: |
| 958 | UnimplementedInstruction(); |
| 959 | } |
| 960 | } else if (vex_f2() && vex_0f3a()) { |
| 961 | int mod, regop, rm; |
| 962 | get_modrm(*current, &mod, ®op, &rm); |
| 963 | switch (opcode) { |
| 964 | case 0xf0: |
| 965 | AppendToBuffer("rorx %s,", NameOfCPURegister(regop)); |
| 966 | current += PrintRightOperand(current); |
| 967 | AppendToBuffer(",%d", *current & 0x1f); |
| 968 | current += 1; |
| 969 | break; |
| 970 | default: |
| 971 | UnimplementedInstruction(); |
| 972 | } |
| 973 | } else if (vex_none() && vex_0f()) { |
| 974 | int mod, regop, rm, vvvv = vex_vreg(); |
| 975 | get_modrm(*current, &mod, ®op, &rm); |
| 976 | switch (opcode) { |
| 977 | case 0x54: |
| 978 | AppendToBuffer("vandps %s,%s,", NameOfXMMRegister(regop), |
| 979 | NameOfXMMRegister(vvvv)); |
| 980 | current += PrintRightXMMOperand(current); |
| 981 | break; |
| 982 | case 0x57: |
| 983 | AppendToBuffer("vxorps %s,%s,", NameOfXMMRegister(regop), |
| 984 | NameOfXMMRegister(vvvv)); |
| 985 | current += PrintRightXMMOperand(current); |
| 986 | break; |
| 987 | default: |
| 988 | UnimplementedInstruction(); |
| 989 | } |
| 990 | } else if (vex_66() && vex_0f()) { |
| 991 | int mod, regop, rm, vvvv = vex_vreg(); |
| 992 | get_modrm(*current, &mod, ®op, &rm); |
| 993 | switch (opcode) { |
| 994 | case 0x54: |
| 995 | AppendToBuffer("vandpd %s,%s,", NameOfXMMRegister(regop), |
| 996 | NameOfXMMRegister(vvvv)); |
| 997 | current += PrintRightXMMOperand(current); |
| 998 | break; |
| 999 | case 0x57: |
| 1000 | AppendToBuffer("vxorpd %s,%s,", NameOfXMMRegister(regop), |
| 1001 | NameOfXMMRegister(vvvv)); |
| 1002 | current += PrintRightXMMOperand(current); |
| 1003 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1004 | default: |
| 1005 | UnimplementedInstruction(); |
| 1006 | } |
| 1007 | } else { |
| 1008 | UnimplementedInstruction(); |
| 1009 | } |
| 1010 | |
| 1011 | return static_cast<int>(current - data); |
| 1012 | } |
| 1013 | |
| 1014 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1015 | // Returns number of bytes used, including *data. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1016 | int DisassemblerIA32::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1017 | byte escape_opcode = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1018 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1019 | byte modrm_byte = *(data+1); |
| 1020 | |
| 1021 | if (modrm_byte >= 0xC0) { |
| 1022 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 1023 | } else { |
| 1024 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1025 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode, |
| 1029 | int modrm_byte, |
| 1030 | byte* modrm_start) { |
| 1031 | const char* mnem = "?"; |
| 1032 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 1033 | switch (escape_opcode) { |
| 1034 | case 0xD9: switch (regop) { |
| 1035 | case 0: mnem = "fld_s"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1036 | case 2: mnem = "fst_s"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1037 | case 3: mnem = "fstp_s"; break; |
| 1038 | case 7: mnem = "fstcw"; break; |
| 1039 | default: UnimplementedInstruction(); |
| 1040 | } |
| 1041 | break; |
| 1042 | |
| 1043 | case 0xDB: switch (regop) { |
| 1044 | case 0: mnem = "fild_s"; break; |
| 1045 | case 1: mnem = "fisttp_s"; break; |
| 1046 | case 2: mnem = "fist_s"; break; |
| 1047 | case 3: mnem = "fistp_s"; break; |
| 1048 | default: UnimplementedInstruction(); |
| 1049 | } |
| 1050 | break; |
| 1051 | |
| 1052 | case 0xDD: switch (regop) { |
| 1053 | case 0: mnem = "fld_d"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1054 | case 1: mnem = "fisttp_d"; break; |
| 1055 | case 2: mnem = "fst_d"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1056 | case 3: mnem = "fstp_d"; break; |
| 1057 | default: UnimplementedInstruction(); |
| 1058 | } |
| 1059 | break; |
| 1060 | |
| 1061 | case 0xDF: switch (regop) { |
| 1062 | case 5: mnem = "fild_d"; break; |
| 1063 | case 7: mnem = "fistp_d"; break; |
| 1064 | default: UnimplementedInstruction(); |
| 1065 | } |
| 1066 | break; |
| 1067 | |
| 1068 | default: UnimplementedInstruction(); |
| 1069 | } |
| 1070 | AppendToBuffer("%s ", mnem); |
| 1071 | int count = PrintRightOperand(modrm_start); |
| 1072 | return count + 1; |
| 1073 | } |
| 1074 | |
| 1075 | int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode, |
| 1076 | byte modrm_byte) { |
| 1077 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 1078 | const char* mnem = "?"; |
| 1079 | |
| 1080 | switch (escape_opcode) { |
| 1081 | case 0xD8: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1082 | has_register = true; |
| 1083 | switch (modrm_byte & 0xF8) { |
| 1084 | case 0xC0: mnem = "fadd_i"; break; |
| 1085 | case 0xE0: mnem = "fsub_i"; break; |
| 1086 | case 0xC8: mnem = "fmul_i"; break; |
| 1087 | case 0xF0: mnem = "fdiv_i"; break; |
| 1088 | default: UnimplementedInstruction(); |
| 1089 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1090 | break; |
| 1091 | |
| 1092 | case 0xD9: |
| 1093 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1094 | case 0xC0: |
| 1095 | mnem = "fld"; |
| 1096 | has_register = true; |
| 1097 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1098 | case 0xC8: |
| 1099 | mnem = "fxch"; |
| 1100 | has_register = true; |
| 1101 | break; |
| 1102 | default: |
| 1103 | switch (modrm_byte) { |
| 1104 | case 0xE0: mnem = "fchs"; break; |
| 1105 | case 0xE1: mnem = "fabs"; break; |
| 1106 | case 0xE4: mnem = "ftst"; break; |
| 1107 | case 0xE8: mnem = "fld1"; break; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1108 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1109 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1110 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1111 | case 0xF0: mnem = "f2xm1"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1112 | case 0xF1: mnem = "fyl2x"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1113 | case 0xF4: mnem = "fxtract"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1114 | case 0xF5: mnem = "fprem1"; break; |
| 1115 | case 0xF7: mnem = "fincstp"; break; |
| 1116 | case 0xF8: mnem = "fprem"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1117 | case 0xFC: mnem = "frndint"; break; |
| 1118 | case 0xFD: mnem = "fscale"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1119 | case 0xFE: mnem = "fsin"; break; |
| 1120 | case 0xFF: mnem = "fcos"; break; |
| 1121 | default: UnimplementedInstruction(); |
| 1122 | } |
| 1123 | } |
| 1124 | break; |
| 1125 | |
| 1126 | case 0xDA: |
| 1127 | if (modrm_byte == 0xE9) { |
| 1128 | mnem = "fucompp"; |
| 1129 | } else { |
| 1130 | UnimplementedInstruction(); |
| 1131 | } |
| 1132 | break; |
| 1133 | |
| 1134 | case 0xDB: |
| 1135 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 1136 | mnem = "fucomi"; |
| 1137 | has_register = true; |
| 1138 | } else if (modrm_byte == 0xE2) { |
| 1139 | mnem = "fclex"; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1140 | } else if (modrm_byte == 0xE3) { |
| 1141 | mnem = "fninit"; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1142 | } else { |
| 1143 | UnimplementedInstruction(); |
| 1144 | } |
| 1145 | break; |
| 1146 | |
| 1147 | case 0xDC: |
| 1148 | has_register = true; |
| 1149 | switch (modrm_byte & 0xF8) { |
| 1150 | case 0xC0: mnem = "fadd"; break; |
| 1151 | case 0xE8: mnem = "fsub"; break; |
| 1152 | case 0xC8: mnem = "fmul"; break; |
| 1153 | case 0xF8: mnem = "fdiv"; break; |
| 1154 | default: UnimplementedInstruction(); |
| 1155 | } |
| 1156 | break; |
| 1157 | |
| 1158 | case 0xDD: |
| 1159 | has_register = true; |
| 1160 | switch (modrm_byte & 0xF8) { |
| 1161 | case 0xC0: mnem = "ffree"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1162 | case 0xD0: mnem = "fst"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1163 | case 0xD8: mnem = "fstp"; break; |
| 1164 | default: UnimplementedInstruction(); |
| 1165 | } |
| 1166 | break; |
| 1167 | |
| 1168 | case 0xDE: |
| 1169 | if (modrm_byte == 0xD9) { |
| 1170 | mnem = "fcompp"; |
| 1171 | } else { |
| 1172 | has_register = true; |
| 1173 | switch (modrm_byte & 0xF8) { |
| 1174 | case 0xC0: mnem = "faddp"; break; |
| 1175 | case 0xE8: mnem = "fsubp"; break; |
| 1176 | case 0xC8: mnem = "fmulp"; break; |
| 1177 | case 0xF8: mnem = "fdivp"; break; |
| 1178 | default: UnimplementedInstruction(); |
| 1179 | } |
| 1180 | } |
| 1181 | break; |
| 1182 | |
| 1183 | case 0xDF: |
| 1184 | if (modrm_byte == 0xE0) { |
| 1185 | mnem = "fnstsw_ax"; |
| 1186 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 1187 | mnem = "fucomip"; |
| 1188 | has_register = true; |
| 1189 | } |
| 1190 | break; |
| 1191 | |
| 1192 | default: UnimplementedInstruction(); |
| 1193 | } |
| 1194 | |
| 1195 | if (has_register) { |
| 1196 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 1197 | } else { |
| 1198 | AppendToBuffer("%s", mnem); |
| 1199 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1200 | return 2; |
| 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | // Mnemonics for instructions 0xF0 byte. |
| 1205 | // Returns NULL if the instruction is not handled here. |
| 1206 | static const char* F0Mnem(byte f0byte) { |
| 1207 | switch (f0byte) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1208 | case 0x0B: |
| 1209 | return "ud2"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1210 | case 0x18: |
| 1211 | return "prefetch"; |
| 1212 | case 0xA2: |
| 1213 | return "cpuid"; |
| 1214 | case 0xBE: |
| 1215 | return "movsx_b"; |
| 1216 | case 0xBF: |
| 1217 | return "movsx_w"; |
| 1218 | case 0xB6: |
| 1219 | return "movzx_b"; |
| 1220 | case 0xB7: |
| 1221 | return "movzx_w"; |
| 1222 | case 0xAF: |
| 1223 | return "imul"; |
| 1224 | case 0xA4: |
| 1225 | return "shld"; |
| 1226 | case 0xA5: |
| 1227 | return "shld"; |
| 1228 | case 0xAD: |
| 1229 | return "shrd"; |
| 1230 | case 0xAC: |
| 1231 | return "shrd"; // 3-operand version. |
| 1232 | case 0xAB: |
| 1233 | return "bts"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1234 | case 0xBC: |
| 1235 | return "bsf"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1236 | case 0xBD: |
| 1237 | return "bsr"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1238 | default: return NULL; |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | |
| 1243 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 1244 | int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 1245 | byte* instr) { |
| 1246 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 1247 | byte* data = instr; |
| 1248 | // Check for hints. |
| 1249 | const char* branch_hint = NULL; |
| 1250 | // We use these two prefixes only with branch prediction |
| 1251 | if (*data == 0x3E /*ds*/) { |
| 1252 | branch_hint = "predicted taken"; |
| 1253 | data++; |
| 1254 | } else if (*data == 0x2E /*cs*/) { |
| 1255 | branch_hint = "predicted not taken"; |
| 1256 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1257 | } else if (*data == 0xC4 && *(data + 1) >= 0xc0) { |
| 1258 | vex_byte0_ = *data; |
| 1259 | vex_byte1_ = *(data + 1); |
| 1260 | vex_byte2_ = *(data + 2); |
| 1261 | data += 3; |
| 1262 | } else if (*data == 0xC5 && *(data + 1) >= 0xc0) { |
| 1263 | vex_byte0_ = *data; |
| 1264 | vex_byte1_ = *(data + 1); |
| 1265 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1266 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1267 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1268 | bool processed = true; // Will be set to false if the current instruction |
| 1269 | // is not in 'instructions' table. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1270 | // Decode AVX instructions. |
| 1271 | if (vex_byte0_ != 0) { |
| 1272 | data += AVXInstruction(data); |
| 1273 | } else { |
| 1274 | const InstructionDesc& idesc = instruction_table_->Get(*data); |
| 1275 | switch (idesc.type) { |
| 1276 | case ZERO_OPERANDS_INSTR: |
| 1277 | AppendToBuffer(idesc.mnem); |
| 1278 | data++; |
| 1279 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1280 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1281 | case TWO_OPERANDS_INSTR: |
| 1282 | data++; |
| 1283 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 1284 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1285 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1286 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 1287 | data += JumpConditionalShort(data, branch_hint); |
| 1288 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1289 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1290 | case REGISTER_INSTR: |
| 1291 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 1292 | data++; |
| 1293 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1294 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1295 | case MOVE_REG_INSTR: { |
| 1296 | byte* addr = |
| 1297 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1298 | AppendToBuffer("mov %s,%s", NameOfCPURegister(*data & 0x07), |
| 1299 | NameOfAddress(addr)); |
| 1300 | data += 5; |
| 1301 | break; |
| 1302 | } |
| 1303 | |
| 1304 | case CALL_JUMP_INSTR: { |
| 1305 | byte* addr = data + *reinterpret_cast<int32_t*>(data + 1) + 5; |
| 1306 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 1307 | data += 5; |
| 1308 | break; |
| 1309 | } |
| 1310 | |
| 1311 | case SHORT_IMMEDIATE_INSTR: { |
| 1312 | byte* addr = |
| 1313 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1314 | AppendToBuffer("%s eax,%s", idesc.mnem, NameOfAddress(addr)); |
| 1315 | data += 5; |
| 1316 | break; |
| 1317 | } |
| 1318 | |
| 1319 | case BYTE_IMMEDIATE_INSTR: { |
| 1320 | AppendToBuffer("%s al,0x%x", idesc.mnem, data[1]); |
| 1321 | data += 2; |
| 1322 | break; |
| 1323 | } |
| 1324 | |
| 1325 | case NO_INSTR: |
| 1326 | processed = false; |
| 1327 | break; |
| 1328 | |
| 1329 | default: |
| 1330 | UNIMPLEMENTED(); // This type is not implemented. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1331 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1332 | } |
| 1333 | //---------------------------- |
| 1334 | if (!processed) { |
| 1335 | switch (*data) { |
| 1336 | case 0xC2: |
| 1337 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 1338 | data += 3; |
| 1339 | break; |
| 1340 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1341 | case 0x6B: { |
| 1342 | data++; |
| 1343 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1344 | AppendToBuffer(",%d", *data); |
| 1345 | data++; |
| 1346 | } break; |
| 1347 | |
| 1348 | case 0x69: { |
| 1349 | data++; |
| 1350 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1351 | AppendToBuffer(",%d", *reinterpret_cast<int32_t*>(data)); |
| 1352 | data += 4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1353 | } |
| 1354 | break; |
| 1355 | |
| 1356 | case 0xF6: |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1357 | { data++; |
| 1358 | int mod, regop, rm; |
| 1359 | get_modrm(*data, &mod, ®op, &rm); |
| 1360 | if (regop == eax) { |
| 1361 | AppendToBuffer("test_b "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1362 | data += PrintRightByteOperand(data); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1363 | int32_t imm = *data; |
| 1364 | AppendToBuffer(",0x%x", imm); |
| 1365 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1366 | } else { |
| 1367 | UnimplementedInstruction(); |
| 1368 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1369 | } |
| 1370 | break; |
| 1371 | |
| 1372 | case 0x81: // fall through |
| 1373 | case 0x83: // 0x81 with sign extension bit set |
| 1374 | data += PrintImmediateOp(data); |
| 1375 | break; |
| 1376 | |
| 1377 | case 0x0F: |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1378 | { byte f0byte = data[1]; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1379 | const char* f0mnem = F0Mnem(f0byte); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1380 | if (f0byte == 0x18) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1381 | data += 2; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1382 | int mod, regop, rm; |
| 1383 | get_modrm(*data, &mod, ®op, &rm); |
| 1384 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 1385 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 1386 | data += PrintRightOperand(data); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1387 | } else if (f0byte == 0x1F && data[2] == 0) { |
| 1388 | AppendToBuffer("nop"); // 3 byte nop. |
| 1389 | data += 3; |
| 1390 | } else if (f0byte == 0x1F && data[2] == 0x40 && data[3] == 0) { |
| 1391 | AppendToBuffer("nop"); // 4 byte nop. |
| 1392 | data += 4; |
| 1393 | } else if (f0byte == 0x1F && data[2] == 0x44 && data[3] == 0 && |
| 1394 | data[4] == 0) { |
| 1395 | AppendToBuffer("nop"); // 5 byte nop. |
| 1396 | data += 5; |
| 1397 | } else if (f0byte == 0x1F && data[2] == 0x80 && data[3] == 0 && |
| 1398 | data[4] == 0 && data[5] == 0 && data[6] == 0) { |
| 1399 | AppendToBuffer("nop"); // 7 byte nop. |
| 1400 | data += 7; |
| 1401 | } else if (f0byte == 0x1F && data[2] == 0x84 && data[3] == 0 && |
| 1402 | data[4] == 0 && data[5] == 0 && data[6] == 0 && |
| 1403 | data[7] == 0) { |
| 1404 | AppendToBuffer("nop"); // 8 byte nop. |
| 1405 | data += 8; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1406 | } else if (f0byte == 0x0B || f0byte == 0xA2 || f0byte == 0x31) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1407 | AppendToBuffer("%s", f0mnem); |
| 1408 | data += 2; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1409 | } else if (f0byte == 0x28) { |
| 1410 | data += 2; |
| 1411 | int mod, regop, rm; |
| 1412 | get_modrm(*data, &mod, ®op, &rm); |
| 1413 | AppendToBuffer("movaps %s,%s", |
| 1414 | NameOfXMMRegister(regop), |
| 1415 | NameOfXMMRegister(rm)); |
| 1416 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1417 | } else if (f0byte == 0x2e) { |
| 1418 | data += 2; |
| 1419 | int mod, regop, rm; |
| 1420 | get_modrm(*data, &mod, ®op, &rm); |
| 1421 | AppendToBuffer("ucomiss %s,", NameOfXMMRegister(regop)); |
| 1422 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1423 | } else if (f0byte >= 0x53 && f0byte <= 0x5F) { |
| 1424 | const char* const pseudo_op[] = { |
| 1425 | "rcpps", |
| 1426 | "andps", |
| 1427 | "andnps", |
| 1428 | "orps", |
| 1429 | "xorps", |
| 1430 | "addps", |
| 1431 | "mulps", |
| 1432 | "cvtps2pd", |
| 1433 | "cvtdq2ps", |
| 1434 | "subps", |
| 1435 | "minps", |
| 1436 | "divps", |
| 1437 | "maxps", |
| 1438 | }; |
| 1439 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1440 | data += 2; |
| 1441 | int mod, regop, rm; |
| 1442 | get_modrm(*data, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1443 | AppendToBuffer("%s %s,", |
| 1444 | pseudo_op[f0byte - 0x53], |
| 1445 | NameOfXMMRegister(regop)); |
| 1446 | data += PrintRightXMMOperand(data); |
| 1447 | } else if (f0byte == 0x50) { |
| 1448 | data += 2; |
| 1449 | int mod, regop, rm; |
| 1450 | get_modrm(*data, &mod, ®op, &rm); |
| 1451 | AppendToBuffer("movmskps %s,%s", |
| 1452 | NameOfCPURegister(regop), |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1453 | NameOfXMMRegister(rm)); |
| 1454 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1455 | } else if (f0byte== 0xC6) { |
| 1456 | // shufps xmm, xmm/m128, imm8 |
| 1457 | data += 2; |
| 1458 | int mod, regop, rm; |
| 1459 | get_modrm(*data, &mod, ®op, &rm); |
| 1460 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1461 | AppendToBuffer("shufps %s,%s,%d", |
| 1462 | NameOfXMMRegister(rm), |
| 1463 | NameOfXMMRegister(regop), |
| 1464 | static_cast<int>(imm8)); |
| 1465 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1466 | } else if ((f0byte & 0xF0) == 0x80) { |
| 1467 | data += JumpConditional(data, branch_hint); |
| 1468 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 1469 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 1470 | data += 2; |
| 1471 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 1472 | } else if ((f0byte & 0xF0) == 0x90) { |
| 1473 | data += SetCC(data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1474 | } else if ((f0byte & 0xF0) == 0x40) { |
| 1475 | data += CMov(data); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1476 | } else if (f0byte == 0xA4 || f0byte == 0xAC) { |
| 1477 | // shld, shrd |
| 1478 | data += 2; |
| 1479 | AppendToBuffer("%s ", f0mnem); |
| 1480 | int mod, regop, rm; |
| 1481 | get_modrm(*data, &mod, ®op, &rm); |
| 1482 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1483 | data += 2; |
| 1484 | AppendToBuffer("%s,%s,%d", NameOfCPURegister(rm), |
| 1485 | NameOfCPURegister(regop), static_cast<int>(imm8)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1486 | } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1487 | // shrd_cl, shld_cl, bts |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1488 | data += 2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1489 | AppendToBuffer("%s ", f0mnem); |
| 1490 | int mod, regop, rm; |
| 1491 | get_modrm(*data, &mod, ®op, &rm); |
| 1492 | data += PrintRightOperand(data); |
| 1493 | if (f0byte == 0xAB) { |
| 1494 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1495 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1496 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1497 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1498 | } else if (f0byte == 0xBC) { |
| 1499 | data += 2; |
| 1500 | int mod, regop, rm; |
| 1501 | get_modrm(*data, &mod, ®op, &rm); |
| 1502 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1503 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1504 | } else if (f0byte == 0xBD) { |
| 1505 | data += 2; |
| 1506 | int mod, regop, rm; |
| 1507 | get_modrm(*data, &mod, ®op, &rm); |
| 1508 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1509 | data += PrintRightOperand(data); |
| 1510 | } else { |
| 1511 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1512 | } |
| 1513 | } |
| 1514 | break; |
| 1515 | |
| 1516 | case 0x8F: |
| 1517 | { data++; |
| 1518 | int mod, regop, rm; |
| 1519 | get_modrm(*data, &mod, ®op, &rm); |
| 1520 | if (regop == eax) { |
| 1521 | AppendToBuffer("pop "); |
| 1522 | data += PrintRightOperand(data); |
| 1523 | } |
| 1524 | } |
| 1525 | break; |
| 1526 | |
| 1527 | case 0xFF: |
| 1528 | { data++; |
| 1529 | int mod, regop, rm; |
| 1530 | get_modrm(*data, &mod, ®op, &rm); |
| 1531 | const char* mnem = NULL; |
| 1532 | switch (regop) { |
| 1533 | case esi: mnem = "push"; break; |
| 1534 | case eax: mnem = "inc"; break; |
| 1535 | case ecx: mnem = "dec"; break; |
| 1536 | case edx: mnem = "call"; break; |
| 1537 | case esp: mnem = "jmp"; break; |
| 1538 | default: mnem = "???"; |
| 1539 | } |
| 1540 | AppendToBuffer("%s ", mnem); |
| 1541 | data += PrintRightOperand(data); |
| 1542 | } |
| 1543 | break; |
| 1544 | |
| 1545 | case 0xC7: // imm32, fall through |
| 1546 | case 0xC6: // imm8 |
| 1547 | { bool is_byte = *data == 0xC6; |
| 1548 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1549 | if (is_byte) { |
| 1550 | AppendToBuffer("%s ", "mov_b"); |
| 1551 | data += PrintRightByteOperand(data); |
| 1552 | int32_t imm = *data; |
| 1553 | AppendToBuffer(",0x%x", imm); |
| 1554 | data++; |
| 1555 | } else { |
| 1556 | AppendToBuffer("%s ", "mov"); |
| 1557 | data += PrintRightOperand(data); |
| 1558 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1559 | AppendToBuffer(",0x%x", imm); |
| 1560 | data += 4; |
| 1561 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1562 | } |
| 1563 | break; |
| 1564 | |
| 1565 | case 0x80: |
| 1566 | { data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1567 | int mod, regop, rm; |
| 1568 | get_modrm(*data, &mod, ®op, &rm); |
| 1569 | const char* mnem = NULL; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1570 | switch (regop) { |
| 1571 | case 5: mnem = "subb"; break; |
| 1572 | case 7: mnem = "cmpb"; break; |
| 1573 | default: UnimplementedInstruction(); |
| 1574 | } |
| 1575 | AppendToBuffer("%s ", mnem); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1576 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1577 | int32_t imm = *data; |
| 1578 | AppendToBuffer(",0x%x", imm); |
| 1579 | data++; |
| 1580 | } |
| 1581 | break; |
| 1582 | |
| 1583 | case 0x88: // 8bit, fall through |
| 1584 | case 0x89: // 32bit |
| 1585 | { bool is_byte = *data == 0x88; |
| 1586 | int mod, regop, rm; |
| 1587 | data++; |
| 1588 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1589 | if (is_byte) { |
| 1590 | AppendToBuffer("%s ", "mov_b"); |
| 1591 | data += PrintRightByteOperand(data); |
| 1592 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1593 | } else { |
| 1594 | AppendToBuffer("%s ", "mov"); |
| 1595 | data += PrintRightOperand(data); |
| 1596 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1597 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1598 | } |
| 1599 | break; |
| 1600 | |
| 1601 | case 0x66: // prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1602 | while (*data == 0x66) data++; |
| 1603 | if (*data == 0xf && data[1] == 0x1f) { |
| 1604 | AppendToBuffer("nop"); // 0x66 prefix |
| 1605 | } else if (*data == 0x90) { |
| 1606 | AppendToBuffer("nop"); // 0x66 prefix |
| 1607 | } else if (*data == 0x8B) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1608 | data++; |
| 1609 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
| 1610 | } else if (*data == 0x89) { |
| 1611 | data++; |
| 1612 | int mod, regop, rm; |
| 1613 | get_modrm(*data, &mod, ®op, &rm); |
| 1614 | AppendToBuffer("mov_w "); |
| 1615 | data += PrintRightOperand(data); |
| 1616 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1617 | } else if (*data == 0xC7) { |
| 1618 | data++; |
| 1619 | AppendToBuffer("%s ", "mov_w"); |
| 1620 | data += PrintRightOperand(data); |
| 1621 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1622 | AppendToBuffer(",0x%x", imm); |
| 1623 | data += 2; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 1624 | } else if (*data == 0xF7) { |
| 1625 | data++; |
| 1626 | AppendToBuffer("%s ", "test_w"); |
| 1627 | data += PrintRightOperand(data); |
| 1628 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1629 | AppendToBuffer(",0x%x", imm); |
| 1630 | data += 2; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1631 | } else if (*data == 0x0F) { |
| 1632 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1633 | if (*data == 0x38) { |
| 1634 | data++; |
| 1635 | if (*data == 0x17) { |
| 1636 | data++; |
| 1637 | int mod, regop, rm; |
| 1638 | get_modrm(*data, &mod, ®op, &rm); |
| 1639 | AppendToBuffer("ptest %s,%s", |
| 1640 | NameOfXMMRegister(regop), |
| 1641 | NameOfXMMRegister(rm)); |
| 1642 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1643 | } else if (*data == 0x2A) { |
| 1644 | // movntdqa |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1645 | UnimplementedInstruction(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1646 | } else { |
| 1647 | UnimplementedInstruction(); |
| 1648 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1649 | } else if (*data == 0x3A) { |
| 1650 | data++; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1651 | if (*data == 0x0A) { |
| 1652 | data++; |
| 1653 | int mod, regop, rm; |
| 1654 | get_modrm(*data, &mod, ®op, &rm); |
| 1655 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1656 | AppendToBuffer("roundss %s,%s,%d", NameOfXMMRegister(regop), |
| 1657 | NameOfXMMRegister(rm), static_cast<int>(imm8)); |
| 1658 | data += 2; |
| 1659 | } else if (*data == 0x0B) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1660 | data++; |
| 1661 | int mod, regop, rm; |
| 1662 | get_modrm(*data, &mod, ®op, &rm); |
| 1663 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1664 | AppendToBuffer("roundsd %s,%s,%d", |
| 1665 | NameOfXMMRegister(regop), |
| 1666 | NameOfXMMRegister(rm), |
| 1667 | static_cast<int>(imm8)); |
| 1668 | data += 2; |
| 1669 | } else if (*data == 0x16) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1670 | data++; |
| 1671 | int mod, regop, rm; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1672 | get_modrm(*data, &mod, &rm, ®op); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1673 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1674 | AppendToBuffer("pextrd %s,%s,%d", |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1675 | NameOfCPURegister(regop), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1676 | NameOfXMMRegister(rm), |
| 1677 | static_cast<int>(imm8)); |
| 1678 | data += 2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1679 | } else if (*data == 0x17) { |
| 1680 | data++; |
| 1681 | int mod, regop, rm; |
| 1682 | get_modrm(*data, &mod, ®op, &rm); |
| 1683 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1684 | AppendToBuffer("extractps %s,%s,%d", |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1685 | NameOfCPURegister(rm), |
| 1686 | NameOfXMMRegister(regop), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1687 | static_cast<int>(imm8)); |
| 1688 | data += 2; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1689 | } else if (*data == 0x22) { |
| 1690 | data++; |
| 1691 | int mod, regop, rm; |
| 1692 | get_modrm(*data, &mod, ®op, &rm); |
| 1693 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1694 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1695 | NameOfXMMRegister(regop), |
| 1696 | NameOfCPURegister(rm), |
| 1697 | static_cast<int>(imm8)); |
| 1698 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1699 | } else { |
| 1700 | UnimplementedInstruction(); |
| 1701 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1702 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1703 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1704 | data++; |
| 1705 | int mod, regop, rm; |
| 1706 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1707 | if (mod == 0x3) { |
| 1708 | AppendToBuffer("%s %s,%s", mnem, |
| 1709 | NameOfXMMRegister(regop), |
| 1710 | NameOfXMMRegister(rm)); |
| 1711 | data++; |
| 1712 | } else { |
| 1713 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1714 | data += PrintRightOperand(data); |
| 1715 | } |
| 1716 | } else if (*data == 0x50) { |
| 1717 | data++; |
| 1718 | int mod, regop, rm; |
| 1719 | get_modrm(*data, &mod, ®op, &rm); |
| 1720 | AppendToBuffer("movmskpd %s,%s", |
| 1721 | NameOfCPURegister(regop), |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1722 | NameOfXMMRegister(rm)); |
| 1723 | data++; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1724 | } else if (*data == 0x54) { |
| 1725 | data++; |
| 1726 | int mod, regop, rm; |
| 1727 | get_modrm(*data, &mod, ®op, &rm); |
| 1728 | AppendToBuffer("andpd %s,%s", |
| 1729 | NameOfXMMRegister(regop), |
| 1730 | NameOfXMMRegister(rm)); |
| 1731 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1732 | } else if (*data == 0x56) { |
| 1733 | data++; |
| 1734 | int mod, regop, rm; |
| 1735 | get_modrm(*data, &mod, ®op, &rm); |
| 1736 | AppendToBuffer("orpd %s,%s", |
| 1737 | NameOfXMMRegister(regop), |
| 1738 | NameOfXMMRegister(rm)); |
| 1739 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1740 | } else if (*data == 0x57) { |
| 1741 | data++; |
| 1742 | int mod, regop, rm; |
| 1743 | get_modrm(*data, &mod, ®op, &rm); |
| 1744 | AppendToBuffer("xorpd %s,%s", |
| 1745 | NameOfXMMRegister(regop), |
| 1746 | NameOfXMMRegister(rm)); |
| 1747 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1748 | } else if (*data == 0x6E) { |
| 1749 | data++; |
| 1750 | int mod, regop, rm; |
| 1751 | get_modrm(*data, &mod, ®op, &rm); |
| 1752 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1753 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1754 | } else if (*data == 0x6F) { |
| 1755 | data++; |
| 1756 | int mod, regop, rm; |
| 1757 | get_modrm(*data, &mod, ®op, &rm); |
| 1758 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1759 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1760 | } else if (*data == 0x70) { |
| 1761 | data++; |
| 1762 | int mod, regop, rm; |
| 1763 | get_modrm(*data, &mod, ®op, &rm); |
| 1764 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1765 | AppendToBuffer("pshufd %s,%s,%d", |
| 1766 | NameOfXMMRegister(regop), |
| 1767 | NameOfXMMRegister(rm), |
| 1768 | static_cast<int>(imm8)); |
| 1769 | data += 2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1770 | } else if (*data == 0x62) { |
| 1771 | data++; |
| 1772 | int mod, regop, rm; |
| 1773 | get_modrm(*data, &mod, ®op, &rm); |
| 1774 | AppendToBuffer("punpckldq %s,%s", NameOfXMMRegister(regop), |
| 1775 | NameOfXMMRegister(rm)); |
| 1776 | data++; |
| 1777 | } else if (*data == 0x6A) { |
| 1778 | data++; |
| 1779 | int mod, regop, rm; |
| 1780 | get_modrm(*data, &mod, ®op, &rm); |
| 1781 | AppendToBuffer("punpckhdq %s,%s", NameOfXMMRegister(regop), |
| 1782 | NameOfXMMRegister(rm)); |
| 1783 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1784 | } else if (*data == 0x76) { |
| 1785 | data++; |
| 1786 | int mod, regop, rm; |
| 1787 | get_modrm(*data, &mod, ®op, &rm); |
| 1788 | AppendToBuffer("pcmpeqd %s,%s", |
| 1789 | NameOfXMMRegister(regop), |
| 1790 | NameOfXMMRegister(rm)); |
| 1791 | data++; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1792 | } else if (*data == 0x90) { |
| 1793 | data++; |
| 1794 | AppendToBuffer("nop"); // 2 byte nop. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1795 | } else if (*data == 0xF3) { |
| 1796 | data++; |
| 1797 | int mod, regop, rm; |
| 1798 | get_modrm(*data, &mod, ®op, &rm); |
| 1799 | AppendToBuffer("psllq %s,%s", |
| 1800 | NameOfXMMRegister(regop), |
| 1801 | NameOfXMMRegister(rm)); |
| 1802 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1803 | } else if (*data == 0x72) { |
| 1804 | data++; |
| 1805 | int mod, regop, rm; |
| 1806 | get_modrm(*data, &mod, ®op, &rm); |
| 1807 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1808 | DCHECK(regop == esi || regop == edx); |
| 1809 | AppendToBuffer("%s %s,%d", (regop == esi) ? "pslld" : "psrld", |
| 1810 | NameOfXMMRegister(rm), static_cast<int>(imm8)); |
| 1811 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1812 | } else if (*data == 0x73) { |
| 1813 | data++; |
| 1814 | int mod, regop, rm; |
| 1815 | get_modrm(*data, &mod, ®op, &rm); |
| 1816 | int8_t imm8 = static_cast<int8_t>(data[1]); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1817 | DCHECK(regop == esi || regop == edx); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1818 | AppendToBuffer("%s %s,%d", |
| 1819 | (regop == esi) ? "psllq" : "psrlq", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1820 | NameOfXMMRegister(rm), |
| 1821 | static_cast<int>(imm8)); |
| 1822 | data += 2; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1823 | } else if (*data == 0xD3) { |
| 1824 | data++; |
| 1825 | int mod, regop, rm; |
| 1826 | get_modrm(*data, &mod, ®op, &rm); |
| 1827 | AppendToBuffer("psrlq %s,%s", |
| 1828 | NameOfXMMRegister(regop), |
| 1829 | NameOfXMMRegister(rm)); |
| 1830 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1831 | } else if (*data == 0x7F) { |
| 1832 | AppendToBuffer("movdqa "); |
| 1833 | data++; |
| 1834 | int mod, regop, rm; |
| 1835 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1836 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1837 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1838 | } else if (*data == 0x7E) { |
| 1839 | data++; |
| 1840 | int mod, regop, rm; |
| 1841 | get_modrm(*data, &mod, ®op, &rm); |
| 1842 | AppendToBuffer("movd "); |
| 1843 | data += PrintRightOperand(data); |
| 1844 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1845 | } else if (*data == 0xDB) { |
| 1846 | data++; |
| 1847 | int mod, regop, rm; |
| 1848 | get_modrm(*data, &mod, ®op, &rm); |
| 1849 | AppendToBuffer("pand %s,%s", |
| 1850 | NameOfXMMRegister(regop), |
| 1851 | NameOfXMMRegister(rm)); |
| 1852 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1853 | } else if (*data == 0xE7) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1854 | data++; |
| 1855 | int mod, regop, rm; |
| 1856 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1857 | if (mod == 3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1858 | // movntdq |
| 1859 | UnimplementedInstruction(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1860 | } else { |
| 1861 | UnimplementedInstruction(); |
| 1862 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1863 | } else if (*data == 0xEF) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1864 | data++; |
| 1865 | int mod, regop, rm; |
| 1866 | get_modrm(*data, &mod, ®op, &rm); |
| 1867 | AppendToBuffer("pxor %s,%s", |
| 1868 | NameOfXMMRegister(regop), |
| 1869 | NameOfXMMRegister(rm)); |
| 1870 | data++; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1871 | } else if (*data == 0xEB) { |
| 1872 | data++; |
| 1873 | int mod, regop, rm; |
| 1874 | get_modrm(*data, &mod, ®op, &rm); |
| 1875 | AppendToBuffer("por %s,%s", |
| 1876 | NameOfXMMRegister(regop), |
| 1877 | NameOfXMMRegister(rm)); |
| 1878 | data++; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1879 | } else { |
| 1880 | UnimplementedInstruction(); |
| 1881 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1882 | } else { |
| 1883 | UnimplementedInstruction(); |
| 1884 | } |
| 1885 | break; |
| 1886 | |
| 1887 | case 0xFE: |
| 1888 | { data++; |
| 1889 | int mod, regop, rm; |
| 1890 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1891 | if (regop == ecx) { |
| 1892 | AppendToBuffer("dec_b "); |
| 1893 | data += PrintRightOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1894 | } else { |
| 1895 | UnimplementedInstruction(); |
| 1896 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1897 | } |
| 1898 | break; |
| 1899 | |
| 1900 | case 0x68: |
| 1901 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1902 | data += 5; |
| 1903 | break; |
| 1904 | |
| 1905 | case 0x6A: |
| 1906 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1907 | data += 2; |
| 1908 | break; |
| 1909 | |
| 1910 | case 0xA8: |
| 1911 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1912 | data += 2; |
| 1913 | break; |
| 1914 | |
| 1915 | case 0xA9: |
| 1916 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1917 | data += 5; |
| 1918 | break; |
| 1919 | |
| 1920 | case 0xD1: // fall through |
| 1921 | case 0xD3: // fall through |
| 1922 | case 0xC1: |
| 1923 | data += D1D3C1Instruction(data); |
| 1924 | break; |
| 1925 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | case 0xD8: // fall through |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1927 | case 0xD9: // fall through |
| 1928 | case 0xDA: // fall through |
| 1929 | case 0xDB: // fall through |
| 1930 | case 0xDC: // fall through |
| 1931 | case 0xDD: // fall through |
| 1932 | case 0xDE: // fall through |
| 1933 | case 0xDF: |
| 1934 | data += FPUInstruction(data); |
| 1935 | break; |
| 1936 | |
| 1937 | case 0xEB: |
| 1938 | data += JumpShort(data); |
| 1939 | break; |
| 1940 | |
| 1941 | case 0xF2: |
| 1942 | if (*(data+1) == 0x0F) { |
| 1943 | byte b2 = *(data+2); |
| 1944 | if (b2 == 0x11) { |
| 1945 | AppendToBuffer("movsd "); |
| 1946 | data += 3; |
| 1947 | int mod, regop, rm; |
| 1948 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1949 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1950 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1951 | } else if (b2 == 0x10) { |
| 1952 | data += 3; |
| 1953 | int mod, regop, rm; |
| 1954 | get_modrm(*data, &mod, ®op, &rm); |
| 1955 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1956 | data += PrintRightXMMOperand(data); |
| 1957 | } else if (b2 == 0x5A) { |
| 1958 | data += 3; |
| 1959 | int mod, regop, rm; |
| 1960 | get_modrm(*data, &mod, ®op, &rm); |
| 1961 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 1962 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1963 | } else { |
| 1964 | const char* mnem = "?"; |
| 1965 | switch (b2) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1966 | case 0x2A: |
| 1967 | mnem = "cvtsi2sd"; |
| 1968 | break; |
| 1969 | case 0x2C: |
| 1970 | mnem = "cvttsd2si"; |
| 1971 | break; |
| 1972 | case 0x2D: |
| 1973 | mnem = "cvtsd2si"; |
| 1974 | break; |
| 1975 | case 0x51: |
| 1976 | mnem = "sqrtsd"; |
| 1977 | break; |
| 1978 | case 0x58: |
| 1979 | mnem = "addsd"; |
| 1980 | break; |
| 1981 | case 0x59: |
| 1982 | mnem = "mulsd"; |
| 1983 | break; |
| 1984 | case 0x5C: |
| 1985 | mnem = "subsd"; |
| 1986 | break; |
| 1987 | case 0x5D: |
| 1988 | mnem = "minsd"; |
| 1989 | break; |
| 1990 | case 0x5E: |
| 1991 | mnem = "divsd"; |
| 1992 | break; |
| 1993 | case 0x5F: |
| 1994 | mnem = "maxsd"; |
| 1995 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1996 | } |
| 1997 | data += 3; |
| 1998 | int mod, regop, rm; |
| 1999 | get_modrm(*data, &mod, ®op, &rm); |
| 2000 | if (b2 == 0x2A) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2001 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2002 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2003 | } else if (b2 == 0x2C || b2 == 0x2D) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2004 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 2005 | data += PrintRightXMMOperand(data); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2006 | } else if (b2 == 0xC2) { |
| 2007 | // Intel manual 2A, Table 3-18. |
| 2008 | const char* const pseudo_op[] = { |
| 2009 | "cmpeqsd", |
| 2010 | "cmpltsd", |
| 2011 | "cmplesd", |
| 2012 | "cmpunordsd", |
| 2013 | "cmpneqsd", |
| 2014 | "cmpnltsd", |
| 2015 | "cmpnlesd", |
| 2016 | "cmpordsd" |
| 2017 | }; |
| 2018 | AppendToBuffer("%s %s,%s", |
| 2019 | pseudo_op[data[1]], |
| 2020 | NameOfXMMRegister(regop), |
| 2021 | NameOfXMMRegister(rm)); |
| 2022 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2023 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2024 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2025 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2026 | } |
| 2027 | } |
| 2028 | } else { |
| 2029 | UnimplementedInstruction(); |
| 2030 | } |
| 2031 | break; |
| 2032 | |
| 2033 | case 0xF3: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2034 | if (*(data+1) == 0x0F) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2035 | byte b2 = *(data+2); |
| 2036 | if (b2 == 0x11) { |
| 2037 | AppendToBuffer("movss "); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2038 | data += 3; |
| 2039 | int mod, regop, rm; |
| 2040 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2041 | data += PrintRightXMMOperand(data); |
| 2042 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 2043 | } else if (b2 == 0x10) { |
| 2044 | data += 3; |
| 2045 | int mod, regop, rm; |
| 2046 | get_modrm(*data, &mod, ®op, &rm); |
| 2047 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 2048 | data += PrintRightXMMOperand(data); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2049 | } else if (b2 == 0x5A) { |
| 2050 | data += 3; |
| 2051 | int mod, regop, rm; |
| 2052 | get_modrm(*data, &mod, ®op, &rm); |
| 2053 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 2054 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2055 | } else if (b2 == 0x6F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2056 | data += 3; |
| 2057 | int mod, regop, rm; |
| 2058 | get_modrm(*data, &mod, ®op, &rm); |
| 2059 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2060 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2061 | } else if (b2 == 0x7F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2062 | AppendToBuffer("movdqu "); |
| 2063 | data += 3; |
| 2064 | int mod, regop, rm; |
| 2065 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2066 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2067 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2068 | } else if (b2 == 0xB8) { |
| 2069 | data += 3; |
| 2070 | int mod, regop, rm; |
| 2071 | get_modrm(*data, &mod, ®op, &rm); |
| 2072 | AppendToBuffer("popcnt %s,", NameOfCPURegister(regop)); |
| 2073 | data += PrintRightOperand(data); |
| 2074 | } else if (b2 == 0xBC) { |
| 2075 | data += 3; |
| 2076 | int mod, regop, rm; |
| 2077 | get_modrm(*data, &mod, ®op, &rm); |
| 2078 | AppendToBuffer("tzcnt %s,", NameOfCPURegister(regop)); |
| 2079 | data += PrintRightOperand(data); |
| 2080 | } else if (b2 == 0xBD) { |
| 2081 | data += 3; |
| 2082 | int mod, regop, rm; |
| 2083 | get_modrm(*data, &mod, ®op, &rm); |
| 2084 | AppendToBuffer("lzcnt %s,", NameOfCPURegister(regop)); |
| 2085 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2086 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2087 | const char* mnem = "?"; |
| 2088 | switch (b2) { |
| 2089 | case 0x2A: |
| 2090 | mnem = "cvtsi2ss"; |
| 2091 | break; |
| 2092 | case 0x2C: |
| 2093 | mnem = "cvttss2si"; |
| 2094 | break; |
| 2095 | case 0x2D: |
| 2096 | mnem = "cvtss2si"; |
| 2097 | break; |
| 2098 | case 0x51: |
| 2099 | mnem = "sqrtss"; |
| 2100 | break; |
| 2101 | case 0x58: |
| 2102 | mnem = "addss"; |
| 2103 | break; |
| 2104 | case 0x59: |
| 2105 | mnem = "mulss"; |
| 2106 | break; |
| 2107 | case 0x5C: |
| 2108 | mnem = "subss"; |
| 2109 | break; |
| 2110 | case 0x5D: |
| 2111 | mnem = "minss"; |
| 2112 | break; |
| 2113 | case 0x5E: |
| 2114 | mnem = "divss"; |
| 2115 | break; |
| 2116 | case 0x5F: |
| 2117 | mnem = "maxss"; |
| 2118 | break; |
| 2119 | } |
| 2120 | data += 3; |
| 2121 | int mod, regop, rm; |
| 2122 | get_modrm(*data, &mod, ®op, &rm); |
| 2123 | if (b2 == 0x2A) { |
| 2124 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2125 | data += PrintRightOperand(data); |
| 2126 | } else if (b2 == 0x2C || b2 == 0x2D) { |
| 2127 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 2128 | data += PrintRightXMMOperand(data); |
| 2129 | } else if (b2 == 0xC2) { |
| 2130 | // Intel manual 2A, Table 3-18. |
| 2131 | const char* const pseudo_op[] = { |
| 2132 | "cmpeqss", "cmpltss", "cmpless", "cmpunordss", |
| 2133 | "cmpneqss", "cmpnltss", "cmpnless", "cmpordss"}; |
| 2134 | AppendToBuffer("%s %s,%s", pseudo_op[data[1]], |
| 2135 | NameOfXMMRegister(regop), NameOfXMMRegister(rm)); |
| 2136 | data += 2; |
| 2137 | } else { |
| 2138 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2139 | data += PrintRightXMMOperand(data); |
| 2140 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2141 | } |
| 2142 | } else if (*(data+1) == 0xA5) { |
| 2143 | data += 2; |
| 2144 | AppendToBuffer("rep_movs"); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2145 | } else if (*(data+1) == 0xAB) { |
| 2146 | data += 2; |
| 2147 | AppendToBuffer("rep_stos"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2148 | } else { |
| 2149 | UnimplementedInstruction(); |
| 2150 | } |
| 2151 | break; |
| 2152 | |
| 2153 | case 0xF7: |
| 2154 | data += F7Instruction(data); |
| 2155 | break; |
| 2156 | |
| 2157 | default: |
| 2158 | UnimplementedInstruction(); |
| 2159 | } |
| 2160 | } |
| 2161 | |
| 2162 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 2163 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 2164 | } |
| 2165 | |
| 2166 | int instr_len = data - instr; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2167 | if (instr_len == 0) { |
| 2168 | printf("%02x", *data); |
| 2169 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2170 | DCHECK(instr_len > 0); // Ensure progress. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2171 | |
| 2172 | int outp = 0; |
| 2173 | // Instruction bytes. |
| 2174 | for (byte* bp = instr; bp < data; bp++) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2175 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2176 | "%02x", |
| 2177 | *bp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2178 | } |
| 2179 | for (int i = 6 - instr_len; i >= 0; i--) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2180 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2181 | } |
| 2182 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2183 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2184 | " %s", |
| 2185 | tmp_buffer_.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2186 | return instr_len; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2187 | } // NOLINT (function is too long) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2188 | |
| 2189 | |
| 2190 | //------------------------------------------------------------------------------ |
| 2191 | |
| 2192 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2193 | static const char* const cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2194 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 2195 | }; |
| 2196 | |
| 2197 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2198 | static const char* const byte_cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2199 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 2200 | }; |
| 2201 | |
| 2202 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2203 | static const char* const xmm_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2204 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 2205 | }; |
| 2206 | |
| 2207 | |
| 2208 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2209 | v8::internal::SNPrintF(tmp_buffer_, "%p", addr); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2210 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2211 | } |
| 2212 | |
| 2213 | |
| 2214 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 2215 | return NameOfAddress(addr); |
| 2216 | } |
| 2217 | |
| 2218 | |
| 2219 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 2220 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 2221 | return "noreg"; |
| 2222 | } |
| 2223 | |
| 2224 | |
| 2225 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 2226 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 2227 | return "noreg"; |
| 2228 | } |
| 2229 | |
| 2230 | |
| 2231 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 2232 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 2233 | return "noxmmreg"; |
| 2234 | } |
| 2235 | |
| 2236 | |
| 2237 | const char* NameConverter::NameInCode(byte* addr) const { |
| 2238 | // IA32 does not embed debug strings at the moment. |
| 2239 | UNREACHABLE(); |
| 2240 | return ""; |
| 2241 | } |
| 2242 | |
| 2243 | |
| 2244 | //------------------------------------------------------------------------------ |
| 2245 | |
| 2246 | Disassembler::Disassembler(const NameConverter& converter) |
| 2247 | : converter_(converter) {} |
| 2248 | |
| 2249 | |
| 2250 | Disassembler::~Disassembler() {} |
| 2251 | |
| 2252 | |
| 2253 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 2254 | byte* instruction) { |
| 2255 | DisassemblerIA32 d(converter_, false /*do not crash if unimplemented*/); |
| 2256 | return d.InstructionDecode(buffer, instruction); |
| 2257 | } |
| 2258 | |
| 2259 | |
| 2260 | // The IA-32 assembler does not currently use constant pools. |
| 2261 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 2262 | |
| 2263 | |
| 2264 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 2265 | NameConverter converter; |
| 2266 | Disassembler d(converter); |
| 2267 | for (byte* pc = begin; pc < end;) { |
| 2268 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 2269 | buffer[0] = '\0'; |
| 2270 | byte* prev_pc = pc; |
| 2271 | pc += d.InstructionDecode(buffer, pc); |
| 2272 | fprintf(f, "%p", prev_pc); |
| 2273 | fprintf(f, " "); |
| 2274 | |
| 2275 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 2276 | fprintf(f, "%02x", *bp); |
| 2277 | } |
| 2278 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 2279 | fprintf(f, " "); |
| 2280 | } |
| 2281 | fprintf(f, " %s\n", buffer.start()); |
| 2282 | } |
| 2283 | } |
| 2284 | |
| 2285 | |
| 2286 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2287 | |
| 2288 | #endif // V8_TARGET_ARCH_IA32 |