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 | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 11 | #include "src/base/compiler-specific.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 12 | #include "src/disasm.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 13 | |
| 14 | namespace disasm { |
| 15 | |
| 16 | enum OperandOrder { |
| 17 | UNSET_OP_ORDER = 0, |
| 18 | REG_OPER_OP_ORDER, |
| 19 | OPER_REG_OP_ORDER |
| 20 | }; |
| 21 | |
| 22 | |
| 23 | //------------------------------------------------------------------ |
| 24 | // Tables |
| 25 | //------------------------------------------------------------------ |
| 26 | struct ByteMnemonic { |
| 27 | int b; // -1 terminates, otherwise must be in range (0..255) |
| 28 | const char* mnem; |
| 29 | OperandOrder op_order_; |
| 30 | }; |
| 31 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 32 | static const ByteMnemonic two_operands_instr[] = { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 33 | {0x01, "add", OPER_REG_OP_ORDER}, {0x03, "add", REG_OPER_OP_ORDER}, |
| 34 | {0x09, "or", OPER_REG_OP_ORDER}, {0x0B, "or", REG_OPER_OP_ORDER}, |
| 35 | {0x13, "adc", REG_OPER_OP_ORDER}, {0x1B, "sbb", REG_OPER_OP_ORDER}, |
| 36 | {0x21, "and", OPER_REG_OP_ORDER}, {0x23, "and", REG_OPER_OP_ORDER}, |
| 37 | {0x29, "sub", OPER_REG_OP_ORDER}, {0x2A, "subb", REG_OPER_OP_ORDER}, |
| 38 | {0x2B, "sub", REG_OPER_OP_ORDER}, {0x31, "xor", OPER_REG_OP_ORDER}, |
| 39 | {0x33, "xor", REG_OPER_OP_ORDER}, {0x38, "cmpb", OPER_REG_OP_ORDER}, |
| 40 | {0x39, "cmp", OPER_REG_OP_ORDER}, {0x3A, "cmpb", REG_OPER_OP_ORDER}, |
| 41 | {0x3B, "cmp", REG_OPER_OP_ORDER}, {0x84, "test_b", REG_OPER_OP_ORDER}, |
| 42 | {0x85, "test", REG_OPER_OP_ORDER}, {0x86, "xchg_b", REG_OPER_OP_ORDER}, |
| 43 | {0x87, "xchg", REG_OPER_OP_ORDER}, {0x8A, "mov_b", REG_OPER_OP_ORDER}, |
| 44 | {0x8B, "mov", REG_OPER_OP_ORDER}, {0x8D, "lea", REG_OPER_OP_ORDER}, |
| 45 | {-1, "", UNSET_OP_ORDER}}; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 46 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 47 | static const ByteMnemonic zero_operands_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 48 | {0xC3, "ret", UNSET_OP_ORDER}, |
| 49 | {0xC9, "leave", UNSET_OP_ORDER}, |
| 50 | {0x90, "nop", UNSET_OP_ORDER}, |
| 51 | {0xF4, "hlt", UNSET_OP_ORDER}, |
| 52 | {0xCC, "int3", UNSET_OP_ORDER}, |
| 53 | {0x60, "pushad", UNSET_OP_ORDER}, |
| 54 | {0x61, "popad", UNSET_OP_ORDER}, |
| 55 | {0x9C, "pushfd", UNSET_OP_ORDER}, |
| 56 | {0x9D, "popfd", UNSET_OP_ORDER}, |
| 57 | {0x9E, "sahf", UNSET_OP_ORDER}, |
| 58 | {0x99, "cdq", UNSET_OP_ORDER}, |
| 59 | {0x9B, "fwait", UNSET_OP_ORDER}, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 60 | {0xFC, "cld", UNSET_OP_ORDER}, |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 61 | {0xAB, "stos", UNSET_OP_ORDER}, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 62 | {-1, "", UNSET_OP_ORDER} |
| 63 | }; |
| 64 | |
| 65 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 66 | static const ByteMnemonic call_jump_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 67 | {0xE8, "call", UNSET_OP_ORDER}, |
| 68 | {0xE9, "jmp", UNSET_OP_ORDER}, |
| 69 | {-1, "", UNSET_OP_ORDER} |
| 70 | }; |
| 71 | |
| 72 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 73 | static const ByteMnemonic short_immediate_instr[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 74 | {0x05, "add", UNSET_OP_ORDER}, |
| 75 | {0x0D, "or", UNSET_OP_ORDER}, |
| 76 | {0x15, "adc", UNSET_OP_ORDER}, |
| 77 | {0x25, "and", UNSET_OP_ORDER}, |
| 78 | {0x2D, "sub", UNSET_OP_ORDER}, |
| 79 | {0x35, "xor", UNSET_OP_ORDER}, |
| 80 | {0x3D, "cmp", UNSET_OP_ORDER}, |
| 81 | {-1, "", UNSET_OP_ORDER} |
| 82 | }; |
| 83 | |
| 84 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 85 | // Generally we don't want to generate these because they are subject to partial |
| 86 | // register stalls. They are included for completeness and because the cmp |
| 87 | // variant is used by the RecordWrite stub. Because it does not update the |
| 88 | // register it is not subject to partial register stalls. |
| 89 | static ByteMnemonic byte_immediate_instr[] = { |
| 90 | {0x0c, "or", UNSET_OP_ORDER}, |
| 91 | {0x24, "and", UNSET_OP_ORDER}, |
| 92 | {0x34, "xor", UNSET_OP_ORDER}, |
| 93 | {0x3c, "cmp", UNSET_OP_ORDER}, |
| 94 | {-1, "", UNSET_OP_ORDER} |
| 95 | }; |
| 96 | |
| 97 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 98 | static const char* const jump_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 99 | /*0*/ "jo", "jno", "jc", "jnc", |
| 100 | /*4*/ "jz", "jnz", "jna", "ja", |
| 101 | /*8*/ "js", "jns", "jpe", "jpo", |
| 102 | /*12*/ "jl", "jnl", "jng", "jg" |
| 103 | }; |
| 104 | |
| 105 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 106 | static const char* const set_conditional_mnem[] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 107 | /*0*/ "seto", "setno", "setc", "setnc", |
| 108 | /*4*/ "setz", "setnz", "setna", "seta", |
| 109 | /*8*/ "sets", "setns", "setpe", "setpo", |
| 110 | /*12*/ "setl", "setnl", "setng", "setg" |
| 111 | }; |
| 112 | |
| 113 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 114 | static const char* const conditional_move_mnem[] = { |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 115 | /*0*/ "cmovo", "cmovno", "cmovc", "cmovnc", |
| 116 | /*4*/ "cmovz", "cmovnz", "cmovna", "cmova", |
| 117 | /*8*/ "cmovs", "cmovns", "cmovpe", "cmovpo", |
| 118 | /*12*/ "cmovl", "cmovnl", "cmovng", "cmovg" |
| 119 | }; |
| 120 | |
| 121 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 122 | enum InstructionType { |
| 123 | NO_INSTR, |
| 124 | ZERO_OPERANDS_INSTR, |
| 125 | TWO_OPERANDS_INSTR, |
| 126 | JUMP_CONDITIONAL_SHORT_INSTR, |
| 127 | REGISTER_INSTR, |
| 128 | MOVE_REG_INSTR, |
| 129 | CALL_JUMP_INSTR, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 130 | SHORT_IMMEDIATE_INSTR, |
| 131 | BYTE_IMMEDIATE_INSTR |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 132 | }; |
| 133 | |
| 134 | |
| 135 | struct InstructionDesc { |
| 136 | const char* mnem; |
| 137 | InstructionType type; |
| 138 | OperandOrder op_order_; |
| 139 | }; |
| 140 | |
| 141 | |
| 142 | class InstructionTable { |
| 143 | public: |
| 144 | InstructionTable(); |
| 145 | const InstructionDesc& Get(byte x) const { return instructions_[x]; } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 146 | static InstructionTable* get_instance() { |
| 147 | static InstructionTable table; |
| 148 | return &table; |
| 149 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 150 | |
| 151 | private: |
| 152 | InstructionDesc instructions_[256]; |
| 153 | void Clear(); |
| 154 | void Init(); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 155 | void CopyTable(const ByteMnemonic bm[], InstructionType type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 156 | void SetTableRange(InstructionType type, |
| 157 | byte start, |
| 158 | byte end, |
| 159 | const char* mnem); |
| 160 | void AddJumpConditionalShort(); |
| 161 | }; |
| 162 | |
| 163 | |
| 164 | InstructionTable::InstructionTable() { |
| 165 | Clear(); |
| 166 | Init(); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | void InstructionTable::Clear() { |
| 171 | for (int i = 0; i < 256; i++) { |
| 172 | instructions_[i].mnem = ""; |
| 173 | instructions_[i].type = NO_INSTR; |
| 174 | instructions_[i].op_order_ = UNSET_OP_ORDER; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | |
| 179 | void InstructionTable::Init() { |
| 180 | CopyTable(two_operands_instr, TWO_OPERANDS_INSTR); |
| 181 | CopyTable(zero_operands_instr, ZERO_OPERANDS_INSTR); |
| 182 | CopyTable(call_jump_instr, CALL_JUMP_INSTR); |
| 183 | CopyTable(short_immediate_instr, SHORT_IMMEDIATE_INSTR); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 184 | CopyTable(byte_immediate_instr, BYTE_IMMEDIATE_INSTR); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 185 | AddJumpConditionalShort(); |
| 186 | SetTableRange(REGISTER_INSTR, 0x40, 0x47, "inc"); |
| 187 | SetTableRange(REGISTER_INSTR, 0x48, 0x4F, "dec"); |
| 188 | SetTableRange(REGISTER_INSTR, 0x50, 0x57, "push"); |
| 189 | SetTableRange(REGISTER_INSTR, 0x58, 0x5F, "pop"); |
| 190 | SetTableRange(REGISTER_INSTR, 0x91, 0x97, "xchg eax,"); // 0x90 is nop. |
| 191 | SetTableRange(MOVE_REG_INSTR, 0xB8, 0xBF, "mov"); |
| 192 | } |
| 193 | |
| 194 | |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 195 | void InstructionTable::CopyTable(const ByteMnemonic bm[], |
| 196 | InstructionType type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 197 | for (int i = 0; bm[i].b >= 0; i++) { |
| 198 | InstructionDesc* id = &instructions_[bm[i].b]; |
| 199 | id->mnem = bm[i].mnem; |
| 200 | id->op_order_ = bm[i].op_order_; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 201 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 202 | id->type = type; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | |
| 207 | void InstructionTable::SetTableRange(InstructionType type, |
| 208 | byte start, |
| 209 | byte end, |
| 210 | const char* mnem) { |
| 211 | for (byte b = start; b <= end; b++) { |
| 212 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 213 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 214 | id->mnem = mnem; |
| 215 | id->type = type; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | |
| 220 | void InstructionTable::AddJumpConditionalShort() { |
| 221 | for (byte b = 0x70; b <= 0x7F; b++) { |
| 222 | InstructionDesc* id = &instructions_[b]; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 223 | DCHECK_EQ(NO_INSTR, id->type); // Information not already entered. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 224 | id->mnem = jump_conditional_mnem[b & 0x0F]; |
| 225 | id->type = JUMP_CONDITIONAL_SHORT_INSTR; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 230 | // The IA32 disassembler implementation. |
| 231 | class DisassemblerIA32 { |
| 232 | public: |
| 233 | DisassemblerIA32(const NameConverter& converter, |
| 234 | bool abort_on_unimplemented = true) |
| 235 | : converter_(converter), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 236 | vex_byte0_(0), |
| 237 | vex_byte1_(0), |
| 238 | vex_byte2_(0), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 239 | instruction_table_(InstructionTable::get_instance()), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 240 | tmp_buffer_pos_(0), |
| 241 | abort_on_unimplemented_(abort_on_unimplemented) { |
| 242 | tmp_buffer_[0] = '\0'; |
| 243 | } |
| 244 | |
| 245 | virtual ~DisassemblerIA32() {} |
| 246 | |
| 247 | // Writes one disassembled instruction into 'buffer' (0-terminated). |
| 248 | // Returns the length of the disassembled machine instruction in bytes. |
| 249 | int InstructionDecode(v8::internal::Vector<char> buffer, byte* instruction); |
| 250 | |
| 251 | private: |
| 252 | const NameConverter& converter_; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 253 | byte vex_byte0_; // 0xc4 or 0xc5 |
| 254 | byte vex_byte1_; |
| 255 | byte vex_byte2_; // only for 3 bytes vex prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 256 | InstructionTable* instruction_table_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 257 | v8::internal::EmbeddedVector<char, 128> tmp_buffer_; |
| 258 | unsigned int tmp_buffer_pos_; |
| 259 | bool abort_on_unimplemented_; |
| 260 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 261 | enum { |
| 262 | eax = 0, |
| 263 | ecx = 1, |
| 264 | edx = 2, |
| 265 | ebx = 3, |
| 266 | esp = 4, |
| 267 | ebp = 5, |
| 268 | esi = 6, |
| 269 | edi = 7 |
| 270 | }; |
| 271 | |
| 272 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 273 | enum ShiftOpcodeExtension { |
| 274 | kROL = 0, |
| 275 | kROR = 1, |
| 276 | kRCL = 2, |
| 277 | kRCR = 3, |
| 278 | kSHL = 4, |
| 279 | KSHR = 5, |
| 280 | kSAR = 7 |
| 281 | }; |
| 282 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 283 | bool vex_128() { |
| 284 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 285 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 286 | return (checked & 4) == 0; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 287 | } |
| 288 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 289 | bool vex_none() { |
| 290 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 291 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 292 | return (checked & 3) == 0; |
| 293 | } |
| 294 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 295 | bool vex_66() { |
| 296 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 297 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 298 | return (checked & 3) == 1; |
| 299 | } |
| 300 | |
| 301 | bool vex_f3() { |
| 302 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 303 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 304 | return (checked & 3) == 2; |
| 305 | } |
| 306 | |
| 307 | bool vex_f2() { |
| 308 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 309 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 310 | return (checked & 3) == 3; |
| 311 | } |
| 312 | |
| 313 | bool vex_w() { |
| 314 | if (vex_byte0_ == 0xc5) return false; |
| 315 | return (vex_byte2_ & 0x80) != 0; |
| 316 | } |
| 317 | |
| 318 | bool vex_0f() { |
| 319 | if (vex_byte0_ == 0xc5) return true; |
| 320 | return (vex_byte1_ & 3) == 1; |
| 321 | } |
| 322 | |
| 323 | bool vex_0f38() { |
| 324 | if (vex_byte0_ == 0xc5) return false; |
| 325 | return (vex_byte1_ & 3) == 2; |
| 326 | } |
| 327 | |
| 328 | bool vex_0f3a() { |
| 329 | if (vex_byte0_ == 0xc5) return false; |
| 330 | return (vex_byte1_ & 3) == 3; |
| 331 | } |
| 332 | |
| 333 | int vex_vreg() { |
| 334 | DCHECK(vex_byte0_ == 0xc4 || vex_byte0_ == 0xc5); |
| 335 | byte checked = vex_byte0_ == 0xc4 ? vex_byte2_ : vex_byte1_; |
| 336 | return ~(checked >> 3) & 0xf; |
| 337 | } |
| 338 | |
| 339 | char float_size_code() { return "sd"[vex_w()]; } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 340 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 341 | const char* NameOfCPURegister(int reg) const { |
| 342 | return converter_.NameOfCPURegister(reg); |
| 343 | } |
| 344 | |
| 345 | |
| 346 | const char* NameOfByteCPURegister(int reg) const { |
| 347 | return converter_.NameOfByteCPURegister(reg); |
| 348 | } |
| 349 | |
| 350 | |
| 351 | const char* NameOfXMMRegister(int reg) const { |
| 352 | return converter_.NameOfXMMRegister(reg); |
| 353 | } |
| 354 | |
| 355 | |
| 356 | const char* NameOfAddress(byte* addr) const { |
| 357 | return converter_.NameOfAddress(addr); |
| 358 | } |
| 359 | |
| 360 | |
| 361 | // Disassembler helper functions. |
| 362 | static void get_modrm(byte data, int* mod, int* regop, int* rm) { |
| 363 | *mod = (data >> 6) & 3; |
| 364 | *regop = (data & 0x38) >> 3; |
| 365 | *rm = data & 7; |
| 366 | } |
| 367 | |
| 368 | |
| 369 | static void get_sib(byte data, int* scale, int* index, int* base) { |
| 370 | *scale = (data >> 6) & 3; |
| 371 | *index = (data >> 3) & 7; |
| 372 | *base = data & 7; |
| 373 | } |
| 374 | |
| 375 | typedef const char* (DisassemblerIA32::*RegisterNameMapping)(int reg) const; |
| 376 | |
| 377 | int PrintRightOperandHelper(byte* modrmp, RegisterNameMapping register_name); |
| 378 | int PrintRightOperand(byte* modrmp); |
| 379 | int PrintRightByteOperand(byte* modrmp); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 380 | int PrintRightXMMOperand(byte* modrmp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 381 | int PrintOperands(const char* mnem, OperandOrder op_order, byte* data); |
| 382 | int PrintImmediateOp(byte* data); |
| 383 | int F7Instruction(byte* data); |
| 384 | int D1D3C1Instruction(byte* data); |
| 385 | int JumpShort(byte* data); |
| 386 | int JumpConditional(byte* data, const char* comment); |
| 387 | int JumpConditionalShort(byte* data, const char* comment); |
| 388 | int SetCC(byte* data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 389 | int CMov(byte* data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 390 | int FPUInstruction(byte* data); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 391 | int MemoryFPUInstruction(int escape_opcode, int regop, byte* modrm_start); |
| 392 | int RegisterFPUInstruction(int escape_opcode, byte modrm_byte); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 393 | int AVXInstruction(byte* data); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 394 | PRINTF_FORMAT(2, 3) void AppendToBuffer(const char* format, ...); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 395 | |
| 396 | void UnimplementedInstruction() { |
| 397 | if (abort_on_unimplemented_) { |
| 398 | UNIMPLEMENTED(); |
| 399 | } else { |
| 400 | AppendToBuffer("'Unimplemented Instruction'"); |
| 401 | } |
| 402 | } |
| 403 | }; |
| 404 | |
| 405 | |
| 406 | void DisassemblerIA32::AppendToBuffer(const char* format, ...) { |
| 407 | v8::internal::Vector<char> buf = tmp_buffer_ + tmp_buffer_pos_; |
| 408 | va_list args; |
| 409 | va_start(args, format); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 410 | int result = v8::internal::VSNPrintF(buf, format, args); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 411 | va_end(args); |
| 412 | tmp_buffer_pos_ += result; |
| 413 | } |
| 414 | |
| 415 | int DisassemblerIA32::PrintRightOperandHelper( |
| 416 | byte* modrmp, |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 417 | RegisterNameMapping direct_register_name) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 418 | int mod, regop, rm; |
| 419 | get_modrm(*modrmp, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 420 | RegisterNameMapping register_name = (mod == 3) ? direct_register_name : |
| 421 | &DisassemblerIA32::NameOfCPURegister; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 422 | switch (mod) { |
| 423 | case 0: |
| 424 | if (rm == ebp) { |
| 425 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp+1); |
| 426 | AppendToBuffer("[0x%x]", disp); |
| 427 | return 5; |
| 428 | } else if (rm == esp) { |
| 429 | byte sib = *(modrmp + 1); |
| 430 | int scale, index, base; |
| 431 | get_sib(sib, &scale, &index, &base); |
| 432 | if (index == esp && base == esp && scale == 0 /*times_1*/) { |
| 433 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 434 | return 2; |
| 435 | } else if (base == ebp) { |
| 436 | int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 437 | AppendToBuffer("[%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 438 | (this->*register_name)(index), |
| 439 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 440 | disp < 0 ? "-" : "+", |
| 441 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 442 | return 6; |
| 443 | } else if (index != esp && base != ebp) { |
| 444 | // [base+index*scale] |
| 445 | AppendToBuffer("[%s+%s*%d]", |
| 446 | (this->*register_name)(base), |
| 447 | (this->*register_name)(index), |
| 448 | 1 << scale); |
| 449 | return 2; |
| 450 | } else { |
| 451 | UnimplementedInstruction(); |
| 452 | return 1; |
| 453 | } |
| 454 | } else { |
| 455 | AppendToBuffer("[%s]", (this->*register_name)(rm)); |
| 456 | return 1; |
| 457 | } |
| 458 | break; |
| 459 | case 1: // fall through |
| 460 | case 2: |
| 461 | if (rm == esp) { |
| 462 | byte sib = *(modrmp + 1); |
| 463 | int scale, index, base; |
| 464 | get_sib(sib, &scale, &index, &base); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 465 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 2) |
| 466 | : *reinterpret_cast<int8_t*>(modrmp + 2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 467 | if (index == base && index == rm /*esp*/ && scale == 0 /*times_1*/) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 468 | AppendToBuffer("[%s%s0x%x]", |
| 469 | (this->*register_name)(rm), |
| 470 | disp < 0 ? "-" : "+", |
| 471 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 472 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 473 | AppendToBuffer("[%s+%s*%d%s0x%x]", |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 474 | (this->*register_name)(base), |
| 475 | (this->*register_name)(index), |
| 476 | 1 << scale, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 477 | disp < 0 ? "-" : "+", |
| 478 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 479 | } |
| 480 | return mod == 2 ? 6 : 3; |
| 481 | } else { |
| 482 | // No sib. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 483 | int disp = mod == 2 ? *reinterpret_cast<int32_t*>(modrmp + 1) |
| 484 | : *reinterpret_cast<int8_t*>(modrmp + 1); |
| 485 | AppendToBuffer("[%s%s0x%x]", |
| 486 | (this->*register_name)(rm), |
| 487 | disp < 0 ? "-" : "+", |
| 488 | disp < 0 ? -disp : disp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 489 | return mod == 2 ? 5 : 2; |
| 490 | } |
| 491 | break; |
| 492 | case 3: |
| 493 | AppendToBuffer("%s", (this->*register_name)(rm)); |
| 494 | return 1; |
| 495 | default: |
| 496 | UnimplementedInstruction(); |
| 497 | return 1; |
| 498 | } |
| 499 | UNREACHABLE(); |
| 500 | } |
| 501 | |
| 502 | |
| 503 | int DisassemblerIA32::PrintRightOperand(byte* modrmp) { |
| 504 | return PrintRightOperandHelper(modrmp, &DisassemblerIA32::NameOfCPURegister); |
| 505 | } |
| 506 | |
| 507 | |
| 508 | int DisassemblerIA32::PrintRightByteOperand(byte* modrmp) { |
| 509 | return PrintRightOperandHelper(modrmp, |
| 510 | &DisassemblerIA32::NameOfByteCPURegister); |
| 511 | } |
| 512 | |
| 513 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 514 | int DisassemblerIA32::PrintRightXMMOperand(byte* modrmp) { |
| 515 | return PrintRightOperandHelper(modrmp, |
| 516 | &DisassemblerIA32::NameOfXMMRegister); |
| 517 | } |
| 518 | |
| 519 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 520 | // Returns number of bytes used including the current *data. |
| 521 | // Writes instruction's mnemonic, left and right operands to 'tmp_buffer_'. |
| 522 | int DisassemblerIA32::PrintOperands(const char* mnem, |
| 523 | OperandOrder op_order, |
| 524 | byte* data) { |
| 525 | byte modrm = *data; |
| 526 | int mod, regop, rm; |
| 527 | get_modrm(modrm, &mod, ®op, &rm); |
| 528 | int advance = 0; |
| 529 | switch (op_order) { |
| 530 | case REG_OPER_OP_ORDER: { |
| 531 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 532 | advance = PrintRightOperand(data); |
| 533 | break; |
| 534 | } |
| 535 | case OPER_REG_OP_ORDER: { |
| 536 | AppendToBuffer("%s ", mnem); |
| 537 | advance = PrintRightOperand(data); |
| 538 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 539 | break; |
| 540 | } |
| 541 | default: |
| 542 | UNREACHABLE(); |
| 543 | break; |
| 544 | } |
| 545 | return advance; |
| 546 | } |
| 547 | |
| 548 | |
| 549 | // Returns number of bytes used by machine instruction, including *data byte. |
| 550 | // Writes immediate instructions to 'tmp_buffer_'. |
| 551 | int DisassemblerIA32::PrintImmediateOp(byte* data) { |
| 552 | bool sign_extension_bit = (*data & 0x02) != 0; |
| 553 | byte modrm = *(data+1); |
| 554 | int mod, regop, rm; |
| 555 | get_modrm(modrm, &mod, ®op, &rm); |
| 556 | const char* mnem = "Imm???"; |
| 557 | switch (regop) { |
| 558 | case 0: mnem = "add"; break; |
| 559 | case 1: mnem = "or"; break; |
| 560 | case 2: mnem = "adc"; break; |
| 561 | case 4: mnem = "and"; break; |
| 562 | case 5: mnem = "sub"; break; |
| 563 | case 6: mnem = "xor"; break; |
| 564 | case 7: mnem = "cmp"; break; |
| 565 | default: UnimplementedInstruction(); |
| 566 | } |
| 567 | AppendToBuffer("%s ", mnem); |
| 568 | int count = PrintRightOperand(data+1); |
| 569 | if (sign_extension_bit) { |
| 570 | AppendToBuffer(",0x%x", *(data + 1 + count)); |
| 571 | return 1 + count + 1 /*int8*/; |
| 572 | } else { |
| 573 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + 1 + count)); |
| 574 | return 1 + count + 4 /*int32_t*/; |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | |
| 579 | // Returns number of bytes used, including *data. |
| 580 | int DisassemblerIA32::F7Instruction(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 581 | DCHECK_EQ(0xF7, *data); |
| 582 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 583 | int mod, regop, rm; |
| 584 | get_modrm(modrm, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 585 | const char* mnem = NULL; |
| 586 | switch (regop) { |
| 587 | case 0: |
| 588 | mnem = "test"; |
| 589 | break; |
| 590 | case 2: |
| 591 | mnem = "not"; |
| 592 | break; |
| 593 | case 3: |
| 594 | mnem = "neg"; |
| 595 | break; |
| 596 | case 4: |
| 597 | mnem = "mul"; |
| 598 | break; |
| 599 | case 5: |
| 600 | mnem = "imul"; |
| 601 | break; |
| 602 | case 6: |
| 603 | mnem = "div"; |
| 604 | break; |
| 605 | case 7: |
| 606 | mnem = "idiv"; |
| 607 | break; |
| 608 | default: |
| 609 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 610 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 611 | AppendToBuffer("%s ", mnem); |
| 612 | int count = PrintRightOperand(data); |
| 613 | if (regop == 0) { |
| 614 | AppendToBuffer(",0x%x", *reinterpret_cast<int32_t*>(data + count)); |
| 615 | count += 4; |
| 616 | } |
| 617 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 618 | } |
| 619 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 620 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 621 | int DisassemblerIA32::D1D3C1Instruction(byte* data) { |
| 622 | byte op = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 623 | DCHECK(op == 0xD1 || op == 0xD3 || op == 0xC1); |
| 624 | byte modrm = *++data; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 625 | int mod, regop, rm; |
| 626 | get_modrm(modrm, &mod, ®op, &rm); |
| 627 | int imm8 = -1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 628 | const char* mnem = NULL; |
| 629 | switch (regop) { |
| 630 | case kROL: |
| 631 | mnem = "rol"; |
| 632 | break; |
| 633 | case kROR: |
| 634 | mnem = "ror"; |
| 635 | break; |
| 636 | case kRCL: |
| 637 | mnem = "rcl"; |
| 638 | break; |
| 639 | case kRCR: |
| 640 | mnem = "rcr"; |
| 641 | break; |
| 642 | case kSHL: |
| 643 | mnem = "shl"; |
| 644 | break; |
| 645 | case KSHR: |
| 646 | mnem = "shr"; |
| 647 | break; |
| 648 | case kSAR: |
| 649 | mnem = "sar"; |
| 650 | break; |
| 651 | default: |
| 652 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 653 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 654 | AppendToBuffer("%s ", mnem); |
| 655 | int count = PrintRightOperand(data); |
| 656 | if (op == 0xD1) { |
| 657 | imm8 = 1; |
| 658 | } else if (op == 0xC1) { |
| 659 | imm8 = *(data + 1); |
| 660 | count++; |
| 661 | } else if (op == 0xD3) { |
| 662 | // Shift/rotate by cl. |
| 663 | } |
| 664 | if (imm8 >= 0) { |
| 665 | AppendToBuffer(",%d", imm8); |
| 666 | } else { |
| 667 | AppendToBuffer(",cl"); |
| 668 | } |
| 669 | return 1 + count; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | |
| 673 | // Returns number of bytes used, including *data. |
| 674 | int DisassemblerIA32::JumpShort(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 675 | DCHECK_EQ(0xEB, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 676 | byte b = *(data+1); |
| 677 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 678 | AppendToBuffer("jmp %s", NameOfAddress(dest)); |
| 679 | return 2; |
| 680 | } |
| 681 | |
| 682 | |
| 683 | // Returns number of bytes used, including *data. |
| 684 | int DisassemblerIA32::JumpConditional(byte* data, const char* comment) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 685 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 686 | byte cond = *(data+1) & 0x0F; |
| 687 | byte* dest = data + *reinterpret_cast<int32_t*>(data+2) + 6; |
| 688 | const char* mnem = jump_conditional_mnem[cond]; |
| 689 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 690 | if (comment != NULL) { |
| 691 | AppendToBuffer(", %s", comment); |
| 692 | } |
| 693 | return 6; // includes 0x0F |
| 694 | } |
| 695 | |
| 696 | |
| 697 | // Returns number of bytes used, including *data. |
| 698 | int DisassemblerIA32::JumpConditionalShort(byte* data, const char* comment) { |
| 699 | byte cond = *data & 0x0F; |
| 700 | byte b = *(data+1); |
| 701 | byte* dest = data + static_cast<int8_t>(b) + 2; |
| 702 | const char* mnem = jump_conditional_mnem[cond]; |
| 703 | AppendToBuffer("%s %s", mnem, NameOfAddress(dest)); |
| 704 | if (comment != NULL) { |
| 705 | AppendToBuffer(", %s", comment); |
| 706 | } |
| 707 | return 2; |
| 708 | } |
| 709 | |
| 710 | |
| 711 | // Returns number of bytes used, including *data. |
| 712 | int DisassemblerIA32::SetCC(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 713 | DCHECK_EQ(0x0F, *data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 714 | byte cond = *(data+1) & 0x0F; |
| 715 | const char* mnem = set_conditional_mnem[cond]; |
| 716 | AppendToBuffer("%s ", mnem); |
| 717 | PrintRightByteOperand(data+2); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 718 | return 3; // Includes 0x0F. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | |
| 722 | // Returns number of bytes used, including *data. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 723 | int DisassemblerIA32::CMov(byte* data) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 724 | DCHECK_EQ(0x0F, *data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 725 | byte cond = *(data + 1) & 0x0F; |
| 726 | const char* mnem = conditional_move_mnem[cond]; |
| 727 | int op_size = PrintOperands(mnem, REG_OPER_OP_ORDER, data + 2); |
| 728 | return 2 + op_size; // includes 0x0F |
| 729 | } |
| 730 | |
| 731 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 732 | int DisassemblerIA32::AVXInstruction(byte* data) { |
| 733 | byte opcode = *data; |
| 734 | byte* current = data + 1; |
| 735 | if (vex_66() && vex_0f38()) { |
| 736 | int mod, regop, rm, vvvv = vex_vreg(); |
| 737 | get_modrm(*current, &mod, ®op, &rm); |
| 738 | switch (opcode) { |
| 739 | case 0x99: |
| 740 | AppendToBuffer("vfmadd132s%c %s,%s,", float_size_code(), |
| 741 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 742 | current += PrintRightXMMOperand(current); |
| 743 | break; |
| 744 | case 0xa9: |
| 745 | AppendToBuffer("vfmadd213s%c %s,%s,", float_size_code(), |
| 746 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 747 | current += PrintRightXMMOperand(current); |
| 748 | break; |
| 749 | case 0xb9: |
| 750 | AppendToBuffer("vfmadd231s%c %s,%s,", float_size_code(), |
| 751 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 752 | current += PrintRightXMMOperand(current); |
| 753 | break; |
| 754 | case 0x9b: |
| 755 | AppendToBuffer("vfmsub132s%c %s,%s,", float_size_code(), |
| 756 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 757 | current += PrintRightXMMOperand(current); |
| 758 | break; |
| 759 | case 0xab: |
| 760 | AppendToBuffer("vfmsub213s%c %s,%s,", float_size_code(), |
| 761 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 762 | current += PrintRightXMMOperand(current); |
| 763 | break; |
| 764 | case 0xbb: |
| 765 | AppendToBuffer("vfmsub231s%c %s,%s,", float_size_code(), |
| 766 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 767 | current += PrintRightXMMOperand(current); |
| 768 | break; |
| 769 | case 0x9d: |
| 770 | AppendToBuffer("vfnmadd132s%c %s,%s,", float_size_code(), |
| 771 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 772 | current += PrintRightXMMOperand(current); |
| 773 | break; |
| 774 | case 0xad: |
| 775 | AppendToBuffer("vfnmadd213s%c %s,%s,", float_size_code(), |
| 776 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 777 | current += PrintRightXMMOperand(current); |
| 778 | break; |
| 779 | case 0xbd: |
| 780 | AppendToBuffer("vfnmadd231s%c %s,%s,", float_size_code(), |
| 781 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 782 | current += PrintRightXMMOperand(current); |
| 783 | break; |
| 784 | case 0x9f: |
| 785 | AppendToBuffer("vfnmsub132s%c %s,%s,", float_size_code(), |
| 786 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 787 | current += PrintRightXMMOperand(current); |
| 788 | break; |
| 789 | case 0xaf: |
| 790 | AppendToBuffer("vfnmsub213s%c %s,%s,", float_size_code(), |
| 791 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 792 | current += PrintRightXMMOperand(current); |
| 793 | break; |
| 794 | case 0xbf: |
| 795 | AppendToBuffer("vfnmsub231s%c %s,%s,", float_size_code(), |
| 796 | NameOfXMMRegister(regop), NameOfXMMRegister(vvvv)); |
| 797 | current += PrintRightXMMOperand(current); |
| 798 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 799 | case 0xf7: |
| 800 | AppendToBuffer("shlx %s,", NameOfCPURegister(regop)); |
| 801 | current += PrintRightOperand(current); |
| 802 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 803 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 804 | default: |
| 805 | UnimplementedInstruction(); |
| 806 | } |
| 807 | } else if (vex_f2() && vex_0f()) { |
| 808 | int mod, regop, rm, vvvv = vex_vreg(); |
| 809 | get_modrm(*current, &mod, ®op, &rm); |
| 810 | switch (opcode) { |
| 811 | case 0x58: |
| 812 | AppendToBuffer("vaddsd %s,%s,", NameOfXMMRegister(regop), |
| 813 | NameOfXMMRegister(vvvv)); |
| 814 | current += PrintRightXMMOperand(current); |
| 815 | break; |
| 816 | case 0x59: |
| 817 | AppendToBuffer("vmulsd %s,%s,", NameOfXMMRegister(regop), |
| 818 | NameOfXMMRegister(vvvv)); |
| 819 | current += PrintRightXMMOperand(current); |
| 820 | break; |
| 821 | case 0x5c: |
| 822 | AppendToBuffer("vsubsd %s,%s,", NameOfXMMRegister(regop), |
| 823 | NameOfXMMRegister(vvvv)); |
| 824 | current += PrintRightXMMOperand(current); |
| 825 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 826 | case 0x5d: |
| 827 | AppendToBuffer("vminsd %s,%s,", NameOfXMMRegister(regop), |
| 828 | NameOfXMMRegister(vvvv)); |
| 829 | current += PrintRightXMMOperand(current); |
| 830 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 831 | case 0x5e: |
| 832 | AppendToBuffer("vdivsd %s,%s,", NameOfXMMRegister(regop), |
| 833 | NameOfXMMRegister(vvvv)); |
| 834 | current += PrintRightXMMOperand(current); |
| 835 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 836 | case 0x5f: |
| 837 | AppendToBuffer("vmaxsd %s,%s,", NameOfXMMRegister(regop), |
| 838 | NameOfXMMRegister(vvvv)); |
| 839 | current += PrintRightXMMOperand(current); |
| 840 | break; |
| 841 | default: |
| 842 | UnimplementedInstruction(); |
| 843 | } |
| 844 | } else if (vex_f3() && vex_0f()) { |
| 845 | int mod, regop, rm, vvvv = vex_vreg(); |
| 846 | get_modrm(*current, &mod, ®op, &rm); |
| 847 | switch (opcode) { |
| 848 | case 0x58: |
| 849 | AppendToBuffer("vaddss %s,%s,", NameOfXMMRegister(regop), |
| 850 | NameOfXMMRegister(vvvv)); |
| 851 | current += PrintRightXMMOperand(current); |
| 852 | break; |
| 853 | case 0x59: |
| 854 | AppendToBuffer("vmulss %s,%s,", NameOfXMMRegister(regop), |
| 855 | NameOfXMMRegister(vvvv)); |
| 856 | current += PrintRightXMMOperand(current); |
| 857 | break; |
| 858 | case 0x5c: |
| 859 | AppendToBuffer("vsubss %s,%s,", NameOfXMMRegister(regop), |
| 860 | NameOfXMMRegister(vvvv)); |
| 861 | current += PrintRightXMMOperand(current); |
| 862 | break; |
| 863 | case 0x5d: |
| 864 | AppendToBuffer("vminss %s,%s,", NameOfXMMRegister(regop), |
| 865 | NameOfXMMRegister(vvvv)); |
| 866 | current += PrintRightXMMOperand(current); |
| 867 | break; |
| 868 | case 0x5e: |
| 869 | AppendToBuffer("vdivss %s,%s,", NameOfXMMRegister(regop), |
| 870 | NameOfXMMRegister(vvvv)); |
| 871 | current += PrintRightXMMOperand(current); |
| 872 | break; |
| 873 | case 0x5f: |
| 874 | AppendToBuffer("vmaxss %s,%s,", NameOfXMMRegister(regop), |
| 875 | NameOfXMMRegister(vvvv)); |
| 876 | current += PrintRightXMMOperand(current); |
| 877 | break; |
| 878 | default: |
| 879 | UnimplementedInstruction(); |
| 880 | } |
| 881 | } else if (vex_none() && vex_0f38()) { |
| 882 | int mod, regop, rm, vvvv = vex_vreg(); |
| 883 | get_modrm(*current, &mod, ®op, &rm); |
| 884 | const char* mnem = "?"; |
| 885 | switch (opcode) { |
| 886 | case 0xf2: |
| 887 | AppendToBuffer("andn %s,%s,", NameOfCPURegister(regop), |
| 888 | NameOfCPURegister(vvvv)); |
| 889 | current += PrintRightOperand(current); |
| 890 | break; |
| 891 | case 0xf5: |
| 892 | AppendToBuffer("bzhi %s,", NameOfCPURegister(regop)); |
| 893 | current += PrintRightOperand(current); |
| 894 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 895 | break; |
| 896 | case 0xf7: |
| 897 | AppendToBuffer("bextr %s,", NameOfCPURegister(regop)); |
| 898 | current += PrintRightOperand(current); |
| 899 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 900 | break; |
| 901 | case 0xf3: |
| 902 | switch (regop) { |
| 903 | case 1: |
| 904 | mnem = "blsr"; |
| 905 | break; |
| 906 | case 2: |
| 907 | mnem = "blsmsk"; |
| 908 | break; |
| 909 | case 3: |
| 910 | mnem = "blsi"; |
| 911 | break; |
| 912 | default: |
| 913 | UnimplementedInstruction(); |
| 914 | } |
| 915 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(vvvv)); |
| 916 | current += PrintRightOperand(current); |
| 917 | mnem = "?"; |
| 918 | break; |
| 919 | default: |
| 920 | UnimplementedInstruction(); |
| 921 | } |
| 922 | } else if (vex_f2() && vex_0f38()) { |
| 923 | int mod, regop, rm, vvvv = vex_vreg(); |
| 924 | get_modrm(*current, &mod, ®op, &rm); |
| 925 | switch (opcode) { |
| 926 | case 0xf5: |
| 927 | AppendToBuffer("pdep %s,%s,", NameOfCPURegister(regop), |
| 928 | NameOfCPURegister(vvvv)); |
| 929 | current += PrintRightOperand(current); |
| 930 | break; |
| 931 | case 0xf6: |
| 932 | AppendToBuffer("mulx %s,%s,", NameOfCPURegister(regop), |
| 933 | NameOfCPURegister(vvvv)); |
| 934 | current += PrintRightOperand(current); |
| 935 | break; |
| 936 | case 0xf7: |
| 937 | AppendToBuffer("shrx %s,", NameOfCPURegister(regop)); |
| 938 | current += PrintRightOperand(current); |
| 939 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 940 | break; |
| 941 | default: |
| 942 | UnimplementedInstruction(); |
| 943 | } |
| 944 | } else if (vex_f3() && vex_0f38()) { |
| 945 | int mod, regop, rm, vvvv = vex_vreg(); |
| 946 | get_modrm(*current, &mod, ®op, &rm); |
| 947 | switch (opcode) { |
| 948 | case 0xf5: |
| 949 | AppendToBuffer("pext %s,%s,", NameOfCPURegister(regop), |
| 950 | NameOfCPURegister(vvvv)); |
| 951 | current += PrintRightOperand(current); |
| 952 | break; |
| 953 | case 0xf7: |
| 954 | AppendToBuffer("sarx %s,", NameOfCPURegister(regop)); |
| 955 | current += PrintRightOperand(current); |
| 956 | AppendToBuffer(",%s", NameOfCPURegister(vvvv)); |
| 957 | break; |
| 958 | default: |
| 959 | UnimplementedInstruction(); |
| 960 | } |
| 961 | } else if (vex_f2() && vex_0f3a()) { |
| 962 | int mod, regop, rm; |
| 963 | get_modrm(*current, &mod, ®op, &rm); |
| 964 | switch (opcode) { |
| 965 | case 0xf0: |
| 966 | AppendToBuffer("rorx %s,", NameOfCPURegister(regop)); |
| 967 | current += PrintRightOperand(current); |
| 968 | AppendToBuffer(",%d", *current & 0x1f); |
| 969 | current += 1; |
| 970 | break; |
| 971 | default: |
| 972 | UnimplementedInstruction(); |
| 973 | } |
| 974 | } else if (vex_none() && vex_0f()) { |
| 975 | int mod, regop, rm, vvvv = vex_vreg(); |
| 976 | get_modrm(*current, &mod, ®op, &rm); |
| 977 | switch (opcode) { |
| 978 | case 0x54: |
| 979 | AppendToBuffer("vandps %s,%s,", NameOfXMMRegister(regop), |
| 980 | NameOfXMMRegister(vvvv)); |
| 981 | current += PrintRightXMMOperand(current); |
| 982 | break; |
| 983 | case 0x57: |
| 984 | AppendToBuffer("vxorps %s,%s,", NameOfXMMRegister(regop), |
| 985 | NameOfXMMRegister(vvvv)); |
| 986 | current += PrintRightXMMOperand(current); |
| 987 | break; |
| 988 | default: |
| 989 | UnimplementedInstruction(); |
| 990 | } |
| 991 | } else if (vex_66() && vex_0f()) { |
| 992 | int mod, regop, rm, vvvv = vex_vreg(); |
| 993 | get_modrm(*current, &mod, ®op, &rm); |
| 994 | switch (opcode) { |
| 995 | case 0x54: |
| 996 | AppendToBuffer("vandpd %s,%s,", NameOfXMMRegister(regop), |
| 997 | NameOfXMMRegister(vvvv)); |
| 998 | current += PrintRightXMMOperand(current); |
| 999 | break; |
| 1000 | case 0x57: |
| 1001 | AppendToBuffer("vxorpd %s,%s,", NameOfXMMRegister(regop), |
| 1002 | NameOfXMMRegister(vvvv)); |
| 1003 | current += PrintRightXMMOperand(current); |
| 1004 | break; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1005 | default: |
| 1006 | UnimplementedInstruction(); |
| 1007 | } |
| 1008 | } else { |
| 1009 | UnimplementedInstruction(); |
| 1010 | } |
| 1011 | |
| 1012 | return static_cast<int>(current - data); |
| 1013 | } |
| 1014 | |
| 1015 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1016 | // Returns number of bytes used, including *data. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1017 | int DisassemblerIA32::FPUInstruction(byte* data) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1018 | byte escape_opcode = *data; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1019 | DCHECK_EQ(0xD8, escape_opcode & 0xF8); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1020 | byte modrm_byte = *(data+1); |
| 1021 | |
| 1022 | if (modrm_byte >= 0xC0) { |
| 1023 | return RegisterFPUInstruction(escape_opcode, modrm_byte); |
| 1024 | } else { |
| 1025 | return MemoryFPUInstruction(escape_opcode, modrm_byte, data+1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1026 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | int DisassemblerIA32::MemoryFPUInstruction(int escape_opcode, |
| 1030 | int modrm_byte, |
| 1031 | byte* modrm_start) { |
| 1032 | const char* mnem = "?"; |
| 1033 | int regop = (modrm_byte >> 3) & 0x7; // reg/op field of modrm byte. |
| 1034 | switch (escape_opcode) { |
| 1035 | case 0xD9: switch (regop) { |
| 1036 | case 0: mnem = "fld_s"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1037 | case 2: mnem = "fst_s"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1038 | case 3: mnem = "fstp_s"; break; |
| 1039 | case 7: mnem = "fstcw"; break; |
| 1040 | default: UnimplementedInstruction(); |
| 1041 | } |
| 1042 | break; |
| 1043 | |
| 1044 | case 0xDB: switch (regop) { |
| 1045 | case 0: mnem = "fild_s"; break; |
| 1046 | case 1: mnem = "fisttp_s"; break; |
| 1047 | case 2: mnem = "fist_s"; break; |
| 1048 | case 3: mnem = "fistp_s"; break; |
| 1049 | default: UnimplementedInstruction(); |
| 1050 | } |
| 1051 | break; |
| 1052 | |
| 1053 | case 0xDD: switch (regop) { |
| 1054 | case 0: mnem = "fld_d"; break; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1055 | case 1: mnem = "fisttp_d"; break; |
| 1056 | case 2: mnem = "fst_d"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1057 | case 3: mnem = "fstp_d"; break; |
| 1058 | default: UnimplementedInstruction(); |
| 1059 | } |
| 1060 | break; |
| 1061 | |
| 1062 | case 0xDF: switch (regop) { |
| 1063 | case 5: mnem = "fild_d"; break; |
| 1064 | case 7: mnem = "fistp_d"; break; |
| 1065 | default: UnimplementedInstruction(); |
| 1066 | } |
| 1067 | break; |
| 1068 | |
| 1069 | default: UnimplementedInstruction(); |
| 1070 | } |
| 1071 | AppendToBuffer("%s ", mnem); |
| 1072 | int count = PrintRightOperand(modrm_start); |
| 1073 | return count + 1; |
| 1074 | } |
| 1075 | |
| 1076 | int DisassemblerIA32::RegisterFPUInstruction(int escape_opcode, |
| 1077 | byte modrm_byte) { |
| 1078 | bool has_register = false; // Is the FPU register encoded in modrm_byte? |
| 1079 | const char* mnem = "?"; |
| 1080 | |
| 1081 | switch (escape_opcode) { |
| 1082 | case 0xD8: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1083 | has_register = true; |
| 1084 | switch (modrm_byte & 0xF8) { |
| 1085 | case 0xC0: mnem = "fadd_i"; break; |
| 1086 | case 0xE0: mnem = "fsub_i"; break; |
| 1087 | case 0xC8: mnem = "fmul_i"; break; |
| 1088 | case 0xF0: mnem = "fdiv_i"; break; |
| 1089 | default: UnimplementedInstruction(); |
| 1090 | } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1091 | break; |
| 1092 | |
| 1093 | case 0xD9: |
| 1094 | switch (modrm_byte & 0xF8) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1095 | case 0xC0: |
| 1096 | mnem = "fld"; |
| 1097 | has_register = true; |
| 1098 | break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1099 | case 0xC8: |
| 1100 | mnem = "fxch"; |
| 1101 | has_register = true; |
| 1102 | break; |
| 1103 | default: |
| 1104 | switch (modrm_byte) { |
| 1105 | case 0xE0: mnem = "fchs"; break; |
| 1106 | case 0xE1: mnem = "fabs"; break; |
| 1107 | case 0xE4: mnem = "ftst"; break; |
| 1108 | case 0xE8: mnem = "fld1"; break; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1109 | case 0xEB: mnem = "fldpi"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1110 | case 0xED: mnem = "fldln2"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1111 | case 0xEE: mnem = "fldz"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1112 | case 0xF0: mnem = "f2xm1"; break; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1113 | case 0xF1: mnem = "fyl2x"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1114 | case 0xF4: mnem = "fxtract"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1115 | case 0xF5: mnem = "fprem1"; break; |
| 1116 | case 0xF7: mnem = "fincstp"; break; |
| 1117 | case 0xF8: mnem = "fprem"; break; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1118 | case 0xFC: mnem = "frndint"; break; |
| 1119 | case 0xFD: mnem = "fscale"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1120 | case 0xFE: mnem = "fsin"; break; |
| 1121 | case 0xFF: mnem = "fcos"; break; |
| 1122 | default: UnimplementedInstruction(); |
| 1123 | } |
| 1124 | } |
| 1125 | break; |
| 1126 | |
| 1127 | case 0xDA: |
| 1128 | if (modrm_byte == 0xE9) { |
| 1129 | mnem = "fucompp"; |
| 1130 | } else { |
| 1131 | UnimplementedInstruction(); |
| 1132 | } |
| 1133 | break; |
| 1134 | |
| 1135 | case 0xDB: |
| 1136 | if ((modrm_byte & 0xF8) == 0xE8) { |
| 1137 | mnem = "fucomi"; |
| 1138 | has_register = true; |
| 1139 | } else if (modrm_byte == 0xE2) { |
| 1140 | mnem = "fclex"; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1141 | } else if (modrm_byte == 0xE3) { |
| 1142 | mnem = "fninit"; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1143 | } else { |
| 1144 | UnimplementedInstruction(); |
| 1145 | } |
| 1146 | break; |
| 1147 | |
| 1148 | case 0xDC: |
| 1149 | has_register = true; |
| 1150 | switch (modrm_byte & 0xF8) { |
| 1151 | case 0xC0: mnem = "fadd"; break; |
| 1152 | case 0xE8: mnem = "fsub"; break; |
| 1153 | case 0xC8: mnem = "fmul"; break; |
| 1154 | case 0xF8: mnem = "fdiv"; break; |
| 1155 | default: UnimplementedInstruction(); |
| 1156 | } |
| 1157 | break; |
| 1158 | |
| 1159 | case 0xDD: |
| 1160 | has_register = true; |
| 1161 | switch (modrm_byte & 0xF8) { |
| 1162 | case 0xC0: mnem = "ffree"; break; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1163 | case 0xD0: mnem = "fst"; break; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1164 | case 0xD8: mnem = "fstp"; break; |
| 1165 | default: UnimplementedInstruction(); |
| 1166 | } |
| 1167 | break; |
| 1168 | |
| 1169 | case 0xDE: |
| 1170 | if (modrm_byte == 0xD9) { |
| 1171 | mnem = "fcompp"; |
| 1172 | } else { |
| 1173 | has_register = true; |
| 1174 | switch (modrm_byte & 0xF8) { |
| 1175 | case 0xC0: mnem = "faddp"; break; |
| 1176 | case 0xE8: mnem = "fsubp"; break; |
| 1177 | case 0xC8: mnem = "fmulp"; break; |
| 1178 | case 0xF8: mnem = "fdivp"; break; |
| 1179 | default: UnimplementedInstruction(); |
| 1180 | } |
| 1181 | } |
| 1182 | break; |
| 1183 | |
| 1184 | case 0xDF: |
| 1185 | if (modrm_byte == 0xE0) { |
| 1186 | mnem = "fnstsw_ax"; |
| 1187 | } else if ((modrm_byte & 0xF8) == 0xE8) { |
| 1188 | mnem = "fucomip"; |
| 1189 | has_register = true; |
| 1190 | } |
| 1191 | break; |
| 1192 | |
| 1193 | default: UnimplementedInstruction(); |
| 1194 | } |
| 1195 | |
| 1196 | if (has_register) { |
| 1197 | AppendToBuffer("%s st%d", mnem, modrm_byte & 0x7); |
| 1198 | } else { |
| 1199 | AppendToBuffer("%s", mnem); |
| 1200 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1201 | return 2; |
| 1202 | } |
| 1203 | |
| 1204 | |
| 1205 | // Mnemonics for instructions 0xF0 byte. |
| 1206 | // Returns NULL if the instruction is not handled here. |
| 1207 | static const char* F0Mnem(byte f0byte) { |
| 1208 | switch (f0byte) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1209 | case 0x0B: |
| 1210 | return "ud2"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1211 | case 0x18: |
| 1212 | return "prefetch"; |
| 1213 | case 0xA2: |
| 1214 | return "cpuid"; |
| 1215 | case 0xBE: |
| 1216 | return "movsx_b"; |
| 1217 | case 0xBF: |
| 1218 | return "movsx_w"; |
| 1219 | case 0xB6: |
| 1220 | return "movzx_b"; |
| 1221 | case 0xB7: |
| 1222 | return "movzx_w"; |
| 1223 | case 0xAF: |
| 1224 | return "imul"; |
| 1225 | case 0xA4: |
| 1226 | return "shld"; |
| 1227 | case 0xA5: |
| 1228 | return "shld"; |
| 1229 | case 0xAD: |
| 1230 | return "shrd"; |
| 1231 | case 0xAC: |
| 1232 | return "shrd"; // 3-operand version. |
| 1233 | case 0xAB: |
| 1234 | return "bts"; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1235 | case 0xB0: |
| 1236 | return "cmpxchg_b"; |
| 1237 | case 0xB1: |
| 1238 | return "cmpxchg"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1239 | case 0xBC: |
| 1240 | return "bsf"; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1241 | case 0xBD: |
| 1242 | return "bsr"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1243 | default: return NULL; |
| 1244 | } |
| 1245 | } |
| 1246 | |
| 1247 | |
| 1248 | // Disassembled instruction '*instr' and writes it into 'out_buffer'. |
| 1249 | int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer, |
| 1250 | byte* instr) { |
| 1251 | tmp_buffer_pos_ = 0; // starting to write as position 0 |
| 1252 | byte* data = instr; |
| 1253 | // Check for hints. |
| 1254 | const char* branch_hint = NULL; |
| 1255 | // We use these two prefixes only with branch prediction |
| 1256 | if (*data == 0x3E /*ds*/) { |
| 1257 | branch_hint = "predicted taken"; |
| 1258 | data++; |
| 1259 | } else if (*data == 0x2E /*cs*/) { |
| 1260 | branch_hint = "predicted not taken"; |
| 1261 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1262 | } else if (*data == 0xC4 && *(data + 1) >= 0xc0) { |
| 1263 | vex_byte0_ = *data; |
| 1264 | vex_byte1_ = *(data + 1); |
| 1265 | vex_byte2_ = *(data + 2); |
| 1266 | data += 3; |
| 1267 | } else if (*data == 0xC5 && *(data + 1) >= 0xc0) { |
| 1268 | vex_byte0_ = *data; |
| 1269 | vex_byte1_ = *(data + 1); |
| 1270 | data += 2; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1271 | } else if (*data == 0xF0 /*lock*/) { |
| 1272 | AppendToBuffer("lock "); |
| 1273 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1274 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1275 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1276 | bool processed = true; // Will be set to false if the current instruction |
| 1277 | // is not in 'instructions' table. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1278 | // Decode AVX instructions. |
| 1279 | if (vex_byte0_ != 0) { |
| 1280 | data += AVXInstruction(data); |
| 1281 | } else { |
| 1282 | const InstructionDesc& idesc = instruction_table_->Get(*data); |
| 1283 | switch (idesc.type) { |
| 1284 | case ZERO_OPERANDS_INSTR: |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1285 | AppendToBuffer("%s", idesc.mnem); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1286 | data++; |
| 1287 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1288 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1289 | case TWO_OPERANDS_INSTR: |
| 1290 | data++; |
| 1291 | data += PrintOperands(idesc.mnem, idesc.op_order_, data); |
| 1292 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1293 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1294 | case JUMP_CONDITIONAL_SHORT_INSTR: |
| 1295 | data += JumpConditionalShort(data, branch_hint); |
| 1296 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1297 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1298 | case REGISTER_INSTR: |
| 1299 | AppendToBuffer("%s %s", idesc.mnem, NameOfCPURegister(*data & 0x07)); |
| 1300 | data++; |
| 1301 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1302 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1303 | case MOVE_REG_INSTR: { |
| 1304 | byte* addr = |
| 1305 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1306 | AppendToBuffer("mov %s,%s", NameOfCPURegister(*data & 0x07), |
| 1307 | NameOfAddress(addr)); |
| 1308 | data += 5; |
| 1309 | break; |
| 1310 | } |
| 1311 | |
| 1312 | case CALL_JUMP_INSTR: { |
| 1313 | byte* addr = data + *reinterpret_cast<int32_t*>(data + 1) + 5; |
| 1314 | AppendToBuffer("%s %s", idesc.mnem, NameOfAddress(addr)); |
| 1315 | data += 5; |
| 1316 | break; |
| 1317 | } |
| 1318 | |
| 1319 | case SHORT_IMMEDIATE_INSTR: { |
| 1320 | byte* addr = |
| 1321 | reinterpret_cast<byte*>(*reinterpret_cast<int32_t*>(data + 1)); |
| 1322 | AppendToBuffer("%s eax,%s", idesc.mnem, NameOfAddress(addr)); |
| 1323 | data += 5; |
| 1324 | break; |
| 1325 | } |
| 1326 | |
| 1327 | case BYTE_IMMEDIATE_INSTR: { |
| 1328 | AppendToBuffer("%s al,0x%x", idesc.mnem, data[1]); |
| 1329 | data += 2; |
| 1330 | break; |
| 1331 | } |
| 1332 | |
| 1333 | case NO_INSTR: |
| 1334 | processed = false; |
| 1335 | break; |
| 1336 | |
| 1337 | default: |
| 1338 | UNIMPLEMENTED(); // This type is not implemented. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1339 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1340 | } |
| 1341 | //---------------------------- |
| 1342 | if (!processed) { |
| 1343 | switch (*data) { |
| 1344 | case 0xC2: |
| 1345 | AppendToBuffer("ret 0x%x", *reinterpret_cast<uint16_t*>(data+1)); |
| 1346 | data += 3; |
| 1347 | break; |
| 1348 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1349 | case 0x6B: { |
| 1350 | data++; |
| 1351 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1352 | AppendToBuffer(",%d", *data); |
| 1353 | data++; |
| 1354 | } break; |
| 1355 | |
| 1356 | case 0x69: { |
| 1357 | data++; |
| 1358 | data += PrintOperands("imul", REG_OPER_OP_ORDER, data); |
| 1359 | AppendToBuffer(",%d", *reinterpret_cast<int32_t*>(data)); |
| 1360 | data += 4; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1361 | } |
| 1362 | break; |
| 1363 | |
| 1364 | case 0xF6: |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1365 | { data++; |
| 1366 | int mod, regop, rm; |
| 1367 | get_modrm(*data, &mod, ®op, &rm); |
| 1368 | if (regop == eax) { |
| 1369 | AppendToBuffer("test_b "); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1370 | data += PrintRightByteOperand(data); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1371 | int32_t imm = *data; |
| 1372 | AppendToBuffer(",0x%x", imm); |
| 1373 | data++; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1374 | } else { |
| 1375 | UnimplementedInstruction(); |
| 1376 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1377 | } |
| 1378 | break; |
| 1379 | |
| 1380 | case 0x81: // fall through |
| 1381 | case 0x83: // 0x81 with sign extension bit set |
| 1382 | data += PrintImmediateOp(data); |
| 1383 | break; |
| 1384 | |
| 1385 | case 0x0F: |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1386 | { byte f0byte = data[1]; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1387 | const char* f0mnem = F0Mnem(f0byte); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1388 | if (f0byte == 0x18) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1389 | data += 2; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1390 | int mod, regop, rm; |
| 1391 | get_modrm(*data, &mod, ®op, &rm); |
| 1392 | const char* suffix[] = {"nta", "1", "2", "3"}; |
| 1393 | AppendToBuffer("%s%s ", f0mnem, suffix[regop & 0x03]); |
| 1394 | data += PrintRightOperand(data); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1395 | } else if (f0byte == 0x1F && data[2] == 0) { |
| 1396 | AppendToBuffer("nop"); // 3 byte nop. |
| 1397 | data += 3; |
| 1398 | } else if (f0byte == 0x1F && data[2] == 0x40 && data[3] == 0) { |
| 1399 | AppendToBuffer("nop"); // 4 byte nop. |
| 1400 | data += 4; |
| 1401 | } else if (f0byte == 0x1F && data[2] == 0x44 && data[3] == 0 && |
| 1402 | data[4] == 0) { |
| 1403 | AppendToBuffer("nop"); // 5 byte nop. |
| 1404 | data += 5; |
| 1405 | } else if (f0byte == 0x1F && data[2] == 0x80 && data[3] == 0 && |
| 1406 | data[4] == 0 && data[5] == 0 && data[6] == 0) { |
| 1407 | AppendToBuffer("nop"); // 7 byte nop. |
| 1408 | data += 7; |
| 1409 | } else if (f0byte == 0x1F && data[2] == 0x84 && data[3] == 0 && |
| 1410 | data[4] == 0 && data[5] == 0 && data[6] == 0 && |
| 1411 | data[7] == 0) { |
| 1412 | AppendToBuffer("nop"); // 8 byte nop. |
| 1413 | data += 8; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1414 | } else if (f0byte == 0x0B || f0byte == 0xA2 || f0byte == 0x31) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1415 | AppendToBuffer("%s", f0mnem); |
| 1416 | data += 2; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1417 | } else if (f0byte == 0x28) { |
| 1418 | data += 2; |
| 1419 | int mod, regop, rm; |
| 1420 | get_modrm(*data, &mod, ®op, &rm); |
| 1421 | AppendToBuffer("movaps %s,%s", |
| 1422 | NameOfXMMRegister(regop), |
| 1423 | NameOfXMMRegister(rm)); |
| 1424 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1425 | } else if (f0byte == 0x2e) { |
| 1426 | data += 2; |
| 1427 | int mod, regop, rm; |
| 1428 | get_modrm(*data, &mod, ®op, &rm); |
| 1429 | AppendToBuffer("ucomiss %s,", NameOfXMMRegister(regop)); |
| 1430 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1431 | } else if (f0byte >= 0x53 && f0byte <= 0x5F) { |
| 1432 | const char* const pseudo_op[] = { |
| 1433 | "rcpps", |
| 1434 | "andps", |
| 1435 | "andnps", |
| 1436 | "orps", |
| 1437 | "xorps", |
| 1438 | "addps", |
| 1439 | "mulps", |
| 1440 | "cvtps2pd", |
| 1441 | "cvtdq2ps", |
| 1442 | "subps", |
| 1443 | "minps", |
| 1444 | "divps", |
| 1445 | "maxps", |
| 1446 | }; |
| 1447 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1448 | data += 2; |
| 1449 | int mod, regop, rm; |
| 1450 | get_modrm(*data, &mod, ®op, &rm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1451 | AppendToBuffer("%s %s,", |
| 1452 | pseudo_op[f0byte - 0x53], |
| 1453 | NameOfXMMRegister(regop)); |
| 1454 | data += PrintRightXMMOperand(data); |
| 1455 | } else if (f0byte == 0x50) { |
| 1456 | data += 2; |
| 1457 | int mod, regop, rm; |
| 1458 | get_modrm(*data, &mod, ®op, &rm); |
| 1459 | AppendToBuffer("movmskps %s,%s", |
| 1460 | NameOfCPURegister(regop), |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1461 | NameOfXMMRegister(rm)); |
| 1462 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1463 | } else if (f0byte== 0xC6) { |
| 1464 | // shufps xmm, xmm/m128, imm8 |
| 1465 | data += 2; |
| 1466 | int mod, regop, rm; |
| 1467 | get_modrm(*data, &mod, ®op, &rm); |
| 1468 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1469 | AppendToBuffer("shufps %s,%s,%d", |
| 1470 | NameOfXMMRegister(rm), |
| 1471 | NameOfXMMRegister(regop), |
| 1472 | static_cast<int>(imm8)); |
| 1473 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1474 | } else if ((f0byte & 0xF0) == 0x80) { |
| 1475 | data += JumpConditional(data, branch_hint); |
| 1476 | } else if (f0byte == 0xBE || f0byte == 0xBF || f0byte == 0xB6 || |
| 1477 | f0byte == 0xB7 || f0byte == 0xAF) { |
| 1478 | data += 2; |
| 1479 | data += PrintOperands(f0mnem, REG_OPER_OP_ORDER, data); |
| 1480 | } else if ((f0byte & 0xF0) == 0x90) { |
| 1481 | data += SetCC(data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1482 | } else if ((f0byte & 0xF0) == 0x40) { |
| 1483 | data += CMov(data); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1484 | } else if (f0byte == 0xA4 || f0byte == 0xAC) { |
| 1485 | // shld, shrd |
| 1486 | data += 2; |
| 1487 | AppendToBuffer("%s ", f0mnem); |
| 1488 | int mod, regop, rm; |
| 1489 | get_modrm(*data, &mod, ®op, &rm); |
| 1490 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1491 | data += 2; |
| 1492 | AppendToBuffer("%s,%s,%d", NameOfCPURegister(rm), |
| 1493 | NameOfCPURegister(regop), static_cast<int>(imm8)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1494 | } else if (f0byte == 0xAB || f0byte == 0xA5 || f0byte == 0xAD) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1495 | // shrd_cl, shld_cl, bts |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1496 | data += 2; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1497 | AppendToBuffer("%s ", f0mnem); |
| 1498 | int mod, regop, rm; |
| 1499 | get_modrm(*data, &mod, ®op, &rm); |
| 1500 | data += PrintRightOperand(data); |
| 1501 | if (f0byte == 0xAB) { |
| 1502 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1503 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1504 | AppendToBuffer(",%s,cl", NameOfCPURegister(regop)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1505 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1506 | } else if (f0byte == 0xB0) { |
| 1507 | // cmpxchg_b |
| 1508 | data += 2; |
| 1509 | AppendToBuffer("%s ", f0mnem); |
| 1510 | int mod, regop, rm; |
| 1511 | get_modrm(*data, &mod, ®op, &rm); |
| 1512 | data += PrintRightOperand(data); |
| 1513 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1514 | } else if (f0byte == 0xB1) { |
| 1515 | // cmpxchg |
| 1516 | data += 2; |
| 1517 | data += PrintOperands(f0mnem, OPER_REG_OP_ORDER, data); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1518 | } else if (f0byte == 0xBC) { |
| 1519 | data += 2; |
| 1520 | int mod, regop, rm; |
| 1521 | get_modrm(*data, &mod, ®op, &rm); |
| 1522 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1523 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1524 | } else if (f0byte == 0xBD) { |
| 1525 | data += 2; |
| 1526 | int mod, regop, rm; |
| 1527 | get_modrm(*data, &mod, ®op, &rm); |
| 1528 | AppendToBuffer("%s %s,", f0mnem, NameOfCPURegister(regop)); |
| 1529 | data += PrintRightOperand(data); |
| 1530 | } else { |
| 1531 | UnimplementedInstruction(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1532 | } |
| 1533 | } |
| 1534 | break; |
| 1535 | |
| 1536 | case 0x8F: |
| 1537 | { data++; |
| 1538 | int mod, regop, rm; |
| 1539 | get_modrm(*data, &mod, ®op, &rm); |
| 1540 | if (regop == eax) { |
| 1541 | AppendToBuffer("pop "); |
| 1542 | data += PrintRightOperand(data); |
| 1543 | } |
| 1544 | } |
| 1545 | break; |
| 1546 | |
| 1547 | case 0xFF: |
| 1548 | { data++; |
| 1549 | int mod, regop, rm; |
| 1550 | get_modrm(*data, &mod, ®op, &rm); |
| 1551 | const char* mnem = NULL; |
| 1552 | switch (regop) { |
| 1553 | case esi: mnem = "push"; break; |
| 1554 | case eax: mnem = "inc"; break; |
| 1555 | case ecx: mnem = "dec"; break; |
| 1556 | case edx: mnem = "call"; break; |
| 1557 | case esp: mnem = "jmp"; break; |
| 1558 | default: mnem = "???"; |
| 1559 | } |
| 1560 | AppendToBuffer("%s ", mnem); |
| 1561 | data += PrintRightOperand(data); |
| 1562 | } |
| 1563 | break; |
| 1564 | |
| 1565 | case 0xC7: // imm32, fall through |
| 1566 | case 0xC6: // imm8 |
| 1567 | { bool is_byte = *data == 0xC6; |
| 1568 | data++; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1569 | if (is_byte) { |
| 1570 | AppendToBuffer("%s ", "mov_b"); |
| 1571 | data += PrintRightByteOperand(data); |
| 1572 | int32_t imm = *data; |
| 1573 | AppendToBuffer(",0x%x", imm); |
| 1574 | data++; |
| 1575 | } else { |
| 1576 | AppendToBuffer("%s ", "mov"); |
| 1577 | data += PrintRightOperand(data); |
| 1578 | int32_t imm = *reinterpret_cast<int32_t*>(data); |
| 1579 | AppendToBuffer(",0x%x", imm); |
| 1580 | data += 4; |
| 1581 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1582 | } |
| 1583 | break; |
| 1584 | |
| 1585 | case 0x80: |
| 1586 | { data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1587 | int mod, regop, rm; |
| 1588 | get_modrm(*data, &mod, ®op, &rm); |
| 1589 | const char* mnem = NULL; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1590 | switch (regop) { |
| 1591 | case 5: mnem = "subb"; break; |
| 1592 | case 7: mnem = "cmpb"; break; |
| 1593 | default: UnimplementedInstruction(); |
| 1594 | } |
| 1595 | AppendToBuffer("%s ", mnem); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1596 | data += PrintRightByteOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1597 | int32_t imm = *data; |
| 1598 | AppendToBuffer(",0x%x", imm); |
| 1599 | data++; |
| 1600 | } |
| 1601 | break; |
| 1602 | |
| 1603 | case 0x88: // 8bit, fall through |
| 1604 | case 0x89: // 32bit |
| 1605 | { bool is_byte = *data == 0x88; |
| 1606 | int mod, regop, rm; |
| 1607 | data++; |
| 1608 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1609 | if (is_byte) { |
| 1610 | AppendToBuffer("%s ", "mov_b"); |
| 1611 | data += PrintRightByteOperand(data); |
| 1612 | AppendToBuffer(",%s", NameOfByteCPURegister(regop)); |
| 1613 | } else { |
| 1614 | AppendToBuffer("%s ", "mov"); |
| 1615 | data += PrintRightOperand(data); |
| 1616 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
| 1617 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1618 | } |
| 1619 | break; |
| 1620 | |
| 1621 | case 0x66: // prefix |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1622 | while (*data == 0x66) data++; |
| 1623 | if (*data == 0xf && data[1] == 0x1f) { |
| 1624 | AppendToBuffer("nop"); // 0x66 prefix |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1625 | } else if (*data == 0x39) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1626 | data++; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1627 | data += PrintOperands("cmpw", OPER_REG_OP_ORDER, data); |
| 1628 | } else if (*data == 0x3B) { |
| 1629 | data++; |
| 1630 | data += PrintOperands("cmpw", REG_OPER_OP_ORDER, data); |
| 1631 | } else if (*data == 0x81) { |
| 1632 | data++; |
| 1633 | AppendToBuffer("cmpw "); |
| 1634 | data += PrintRightOperand(data); |
| 1635 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1636 | AppendToBuffer(",0x%x", imm); |
| 1637 | data += 2; |
| 1638 | } else if (*data == 0x87) { |
| 1639 | data++; |
| 1640 | int mod, regop, rm; |
| 1641 | get_modrm(*data, &mod, ®op, &rm); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1642 | AppendToBuffer("xchg_w %s,", NameOfCPURegister(regop)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1643 | data += PrintRightOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1644 | } else if (*data == 0x89) { |
| 1645 | data++; |
| 1646 | int mod, regop, rm; |
| 1647 | get_modrm(*data, &mod, ®op, &rm); |
| 1648 | AppendToBuffer("mov_w "); |
| 1649 | data += PrintRightOperand(data); |
| 1650 | AppendToBuffer(",%s", NameOfCPURegister(regop)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 1651 | } else if (*data == 0x8B) { |
| 1652 | data++; |
| 1653 | data += PrintOperands("mov_w", REG_OPER_OP_ORDER, data); |
| 1654 | } else if (*data == 0x90) { |
| 1655 | AppendToBuffer("nop"); // 0x66 prefix |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1656 | } else if (*data == 0xC7) { |
| 1657 | data++; |
| 1658 | AppendToBuffer("%s ", "mov_w"); |
| 1659 | data += PrintRightOperand(data); |
| 1660 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1661 | AppendToBuffer(",0x%x", imm); |
| 1662 | data += 2; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1663 | } else if (*data == 0xF7) { |
| 1664 | data++; |
| 1665 | AppendToBuffer("%s ", "test_w"); |
| 1666 | data += PrintRightOperand(data); |
| 1667 | int imm = *reinterpret_cast<int16_t*>(data); |
| 1668 | AppendToBuffer(",0x%x", imm); |
| 1669 | data += 2; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1670 | } else if (*data == 0x0F) { |
| 1671 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1672 | if (*data == 0x38) { |
| 1673 | data++; |
| 1674 | if (*data == 0x17) { |
| 1675 | data++; |
| 1676 | int mod, regop, rm; |
| 1677 | get_modrm(*data, &mod, ®op, &rm); |
| 1678 | AppendToBuffer("ptest %s,%s", |
| 1679 | NameOfXMMRegister(regop), |
| 1680 | NameOfXMMRegister(rm)); |
| 1681 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1682 | } else if (*data == 0x2A) { |
| 1683 | // movntdqa |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1684 | UnimplementedInstruction(); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1685 | } else { |
| 1686 | UnimplementedInstruction(); |
| 1687 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1688 | } else if (*data == 0x3A) { |
| 1689 | data++; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1690 | if (*data == 0x0A) { |
| 1691 | data++; |
| 1692 | int mod, regop, rm; |
| 1693 | get_modrm(*data, &mod, ®op, &rm); |
| 1694 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1695 | AppendToBuffer("roundss %s,%s,%d", NameOfXMMRegister(regop), |
| 1696 | NameOfXMMRegister(rm), static_cast<int>(imm8)); |
| 1697 | data += 2; |
| 1698 | } else if (*data == 0x0B) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1699 | data++; |
| 1700 | int mod, regop, rm; |
| 1701 | get_modrm(*data, &mod, ®op, &rm); |
| 1702 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1703 | AppendToBuffer("roundsd %s,%s,%d", |
| 1704 | NameOfXMMRegister(regop), |
| 1705 | NameOfXMMRegister(rm), |
| 1706 | static_cast<int>(imm8)); |
| 1707 | data += 2; |
| 1708 | } else if (*data == 0x16) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1709 | data++; |
| 1710 | int mod, regop, rm; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1711 | get_modrm(*data, &mod, &rm, ®op); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1712 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1713 | AppendToBuffer("pextrd %s,%s,%d", |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1714 | NameOfCPURegister(regop), |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1715 | NameOfXMMRegister(rm), |
| 1716 | static_cast<int>(imm8)); |
| 1717 | data += 2; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1718 | } else if (*data == 0x17) { |
| 1719 | data++; |
| 1720 | int mod, regop, rm; |
| 1721 | get_modrm(*data, &mod, ®op, &rm); |
| 1722 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1723 | AppendToBuffer("extractps %s,%s,%d", |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1724 | NameOfCPURegister(rm), |
| 1725 | NameOfXMMRegister(regop), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1726 | static_cast<int>(imm8)); |
| 1727 | data += 2; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1728 | } else if (*data == 0x22) { |
| 1729 | data++; |
| 1730 | int mod, regop, rm; |
| 1731 | get_modrm(*data, &mod, ®op, &rm); |
| 1732 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1733 | AppendToBuffer("pinsrd %s,%s,%d", |
| 1734 | NameOfXMMRegister(regop), |
| 1735 | NameOfCPURegister(rm), |
| 1736 | static_cast<int>(imm8)); |
| 1737 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1738 | } else { |
| 1739 | UnimplementedInstruction(); |
| 1740 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1741 | } else if (*data == 0x2E || *data == 0x2F) { |
| 1742 | const char* mnem = (*data == 0x2E) ? "ucomisd" : "comisd"; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1743 | data++; |
| 1744 | int mod, regop, rm; |
| 1745 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1746 | if (mod == 0x3) { |
| 1747 | AppendToBuffer("%s %s,%s", mnem, |
| 1748 | NameOfXMMRegister(regop), |
| 1749 | NameOfXMMRegister(rm)); |
| 1750 | data++; |
| 1751 | } else { |
| 1752 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 1753 | data += PrintRightOperand(data); |
| 1754 | } |
| 1755 | } else if (*data == 0x50) { |
| 1756 | data++; |
| 1757 | int mod, regop, rm; |
| 1758 | get_modrm(*data, &mod, ®op, &rm); |
| 1759 | AppendToBuffer("movmskpd %s,%s", |
| 1760 | NameOfCPURegister(regop), |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1761 | NameOfXMMRegister(rm)); |
| 1762 | data++; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1763 | } else if (*data == 0x54) { |
| 1764 | data++; |
| 1765 | int mod, regop, rm; |
| 1766 | get_modrm(*data, &mod, ®op, &rm); |
| 1767 | AppendToBuffer("andpd %s,%s", |
| 1768 | NameOfXMMRegister(regop), |
| 1769 | NameOfXMMRegister(rm)); |
| 1770 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1771 | } else if (*data == 0x56) { |
| 1772 | data++; |
| 1773 | int mod, regop, rm; |
| 1774 | get_modrm(*data, &mod, ®op, &rm); |
| 1775 | AppendToBuffer("orpd %s,%s", |
| 1776 | NameOfXMMRegister(regop), |
| 1777 | NameOfXMMRegister(rm)); |
| 1778 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1779 | } else if (*data == 0x57) { |
| 1780 | data++; |
| 1781 | int mod, regop, rm; |
| 1782 | get_modrm(*data, &mod, ®op, &rm); |
| 1783 | AppendToBuffer("xorpd %s,%s", |
| 1784 | NameOfXMMRegister(regop), |
| 1785 | NameOfXMMRegister(rm)); |
| 1786 | data++; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1787 | } else if (*data == 0x6E) { |
| 1788 | data++; |
| 1789 | int mod, regop, rm; |
| 1790 | get_modrm(*data, &mod, ®op, &rm); |
| 1791 | AppendToBuffer("movd %s,", NameOfXMMRegister(regop)); |
| 1792 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1793 | } else if (*data == 0x6F) { |
| 1794 | data++; |
| 1795 | int mod, regop, rm; |
| 1796 | get_modrm(*data, &mod, ®op, &rm); |
| 1797 | AppendToBuffer("movdqa %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1798 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1799 | } else if (*data == 0x70) { |
| 1800 | data++; |
| 1801 | int mod, regop, rm; |
| 1802 | get_modrm(*data, &mod, ®op, &rm); |
| 1803 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1804 | AppendToBuffer("pshufd %s,%s,%d", |
| 1805 | NameOfXMMRegister(regop), |
| 1806 | NameOfXMMRegister(rm), |
| 1807 | static_cast<int>(imm8)); |
| 1808 | data += 2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1809 | } else if (*data == 0x62) { |
| 1810 | data++; |
| 1811 | int mod, regop, rm; |
| 1812 | get_modrm(*data, &mod, ®op, &rm); |
| 1813 | AppendToBuffer("punpckldq %s,%s", NameOfXMMRegister(regop), |
| 1814 | NameOfXMMRegister(rm)); |
| 1815 | data++; |
| 1816 | } else if (*data == 0x6A) { |
| 1817 | data++; |
| 1818 | int mod, regop, rm; |
| 1819 | get_modrm(*data, &mod, ®op, &rm); |
| 1820 | AppendToBuffer("punpckhdq %s,%s", NameOfXMMRegister(regop), |
| 1821 | NameOfXMMRegister(rm)); |
| 1822 | data++; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1823 | } else if (*data == 0x76) { |
| 1824 | data++; |
| 1825 | int mod, regop, rm; |
| 1826 | get_modrm(*data, &mod, ®op, &rm); |
| 1827 | AppendToBuffer("pcmpeqd %s,%s", |
| 1828 | NameOfXMMRegister(regop), |
| 1829 | NameOfXMMRegister(rm)); |
| 1830 | data++; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1831 | } else if (*data == 0x90) { |
| 1832 | data++; |
| 1833 | AppendToBuffer("nop"); // 2 byte nop. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1834 | } else if (*data == 0xF3) { |
| 1835 | data++; |
| 1836 | int mod, regop, rm; |
| 1837 | get_modrm(*data, &mod, ®op, &rm); |
| 1838 | AppendToBuffer("psllq %s,%s", |
| 1839 | NameOfXMMRegister(regop), |
| 1840 | NameOfXMMRegister(rm)); |
| 1841 | data++; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1842 | } else if (*data == 0x72) { |
| 1843 | data++; |
| 1844 | int mod, regop, rm; |
| 1845 | get_modrm(*data, &mod, ®op, &rm); |
| 1846 | int8_t imm8 = static_cast<int8_t>(data[1]); |
| 1847 | DCHECK(regop == esi || regop == edx); |
| 1848 | AppendToBuffer("%s %s,%d", (regop == esi) ? "pslld" : "psrld", |
| 1849 | NameOfXMMRegister(rm), static_cast<int>(imm8)); |
| 1850 | data += 2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1851 | } else if (*data == 0x73) { |
| 1852 | data++; |
| 1853 | int mod, regop, rm; |
| 1854 | get_modrm(*data, &mod, ®op, &rm); |
| 1855 | int8_t imm8 = static_cast<int8_t>(data[1]); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1856 | DCHECK(regop == esi || regop == edx); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1857 | AppendToBuffer("%s %s,%d", |
| 1858 | (regop == esi) ? "psllq" : "psrlq", |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1859 | NameOfXMMRegister(rm), |
| 1860 | static_cast<int>(imm8)); |
| 1861 | data += 2; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1862 | } else if (*data == 0xD3) { |
| 1863 | data++; |
| 1864 | int mod, regop, rm; |
| 1865 | get_modrm(*data, &mod, ®op, &rm); |
| 1866 | AppendToBuffer("psrlq %s,%s", |
| 1867 | NameOfXMMRegister(regop), |
| 1868 | NameOfXMMRegister(rm)); |
| 1869 | data++; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1870 | } else if (*data == 0x7F) { |
| 1871 | AppendToBuffer("movdqa "); |
| 1872 | data++; |
| 1873 | int mod, regop, rm; |
| 1874 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1875 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1876 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1877 | } else if (*data == 0x7E) { |
| 1878 | data++; |
| 1879 | int mod, regop, rm; |
| 1880 | get_modrm(*data, &mod, ®op, &rm); |
| 1881 | AppendToBuffer("movd "); |
| 1882 | data += PrintRightOperand(data); |
| 1883 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1884 | } else if (*data == 0xDB) { |
| 1885 | data++; |
| 1886 | int mod, regop, rm; |
| 1887 | get_modrm(*data, &mod, ®op, &rm); |
| 1888 | AppendToBuffer("pand %s,%s", |
| 1889 | NameOfXMMRegister(regop), |
| 1890 | NameOfXMMRegister(rm)); |
| 1891 | data++; |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1892 | } else if (*data == 0xE7) { |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1893 | data++; |
| 1894 | int mod, regop, rm; |
| 1895 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1896 | if (mod == 3) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1897 | // movntdq |
| 1898 | UnimplementedInstruction(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1899 | } else { |
| 1900 | UnimplementedInstruction(); |
| 1901 | } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1902 | } else if (*data == 0xEF) { |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1903 | data++; |
| 1904 | int mod, regop, rm; |
| 1905 | get_modrm(*data, &mod, ®op, &rm); |
| 1906 | AppendToBuffer("pxor %s,%s", |
| 1907 | NameOfXMMRegister(regop), |
| 1908 | NameOfXMMRegister(rm)); |
| 1909 | data++; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1910 | } else if (*data == 0xEB) { |
| 1911 | data++; |
| 1912 | int mod, regop, rm; |
| 1913 | get_modrm(*data, &mod, ®op, &rm); |
| 1914 | AppendToBuffer("por %s,%s", |
| 1915 | NameOfXMMRegister(regop), |
| 1916 | NameOfXMMRegister(rm)); |
| 1917 | data++; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1918 | } else if (*data == 0xB1) { |
| 1919 | data++; |
| 1920 | data += PrintOperands("cmpxchg_w", OPER_REG_OP_ORDER, data); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 1921 | } else { |
| 1922 | UnimplementedInstruction(); |
| 1923 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1924 | } else { |
| 1925 | UnimplementedInstruction(); |
| 1926 | } |
| 1927 | break; |
| 1928 | |
| 1929 | case 0xFE: |
| 1930 | { data++; |
| 1931 | int mod, regop, rm; |
| 1932 | get_modrm(*data, &mod, ®op, &rm); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1933 | if (regop == ecx) { |
| 1934 | AppendToBuffer("dec_b "); |
| 1935 | data += PrintRightOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1936 | } else { |
| 1937 | UnimplementedInstruction(); |
| 1938 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1939 | } |
| 1940 | break; |
| 1941 | |
| 1942 | case 0x68: |
| 1943 | AppendToBuffer("push 0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1944 | data += 5; |
| 1945 | break; |
| 1946 | |
| 1947 | case 0x6A: |
| 1948 | AppendToBuffer("push 0x%x", *reinterpret_cast<int8_t*>(data + 1)); |
| 1949 | data += 2; |
| 1950 | break; |
| 1951 | |
| 1952 | case 0xA8: |
| 1953 | AppendToBuffer("test al,0x%x", *reinterpret_cast<uint8_t*>(data+1)); |
| 1954 | data += 2; |
| 1955 | break; |
| 1956 | |
| 1957 | case 0xA9: |
| 1958 | AppendToBuffer("test eax,0x%x", *reinterpret_cast<int32_t*>(data+1)); |
| 1959 | data += 5; |
| 1960 | break; |
| 1961 | |
| 1962 | case 0xD1: // fall through |
| 1963 | case 0xD3: // fall through |
| 1964 | case 0xC1: |
| 1965 | data += D1D3C1Instruction(data); |
| 1966 | break; |
| 1967 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1968 | case 0xD8: // fall through |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1969 | case 0xD9: // fall through |
| 1970 | case 0xDA: // fall through |
| 1971 | case 0xDB: // fall through |
| 1972 | case 0xDC: // fall through |
| 1973 | case 0xDD: // fall through |
| 1974 | case 0xDE: // fall through |
| 1975 | case 0xDF: |
| 1976 | data += FPUInstruction(data); |
| 1977 | break; |
| 1978 | |
| 1979 | case 0xEB: |
| 1980 | data += JumpShort(data); |
| 1981 | break; |
| 1982 | |
| 1983 | case 0xF2: |
| 1984 | if (*(data+1) == 0x0F) { |
| 1985 | byte b2 = *(data+2); |
| 1986 | if (b2 == 0x11) { |
| 1987 | AppendToBuffer("movsd "); |
| 1988 | data += 3; |
| 1989 | int mod, regop, rm; |
| 1990 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1991 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1992 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 1993 | } else if (b2 == 0x10) { |
| 1994 | data += 3; |
| 1995 | int mod, regop, rm; |
| 1996 | get_modrm(*data, &mod, ®op, &rm); |
| 1997 | AppendToBuffer("movsd %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1998 | data += PrintRightXMMOperand(data); |
| 1999 | } else if (b2 == 0x5A) { |
| 2000 | data += 3; |
| 2001 | int mod, regop, rm; |
| 2002 | get_modrm(*data, &mod, ®op, &rm); |
| 2003 | AppendToBuffer("cvtsd2ss %s,", NameOfXMMRegister(regop)); |
| 2004 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2005 | } else { |
| 2006 | const char* mnem = "?"; |
| 2007 | switch (b2) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2008 | case 0x2A: |
| 2009 | mnem = "cvtsi2sd"; |
| 2010 | break; |
| 2011 | case 0x2C: |
| 2012 | mnem = "cvttsd2si"; |
| 2013 | break; |
| 2014 | case 0x2D: |
| 2015 | mnem = "cvtsd2si"; |
| 2016 | break; |
| 2017 | case 0x51: |
| 2018 | mnem = "sqrtsd"; |
| 2019 | break; |
| 2020 | case 0x58: |
| 2021 | mnem = "addsd"; |
| 2022 | break; |
| 2023 | case 0x59: |
| 2024 | mnem = "mulsd"; |
| 2025 | break; |
| 2026 | case 0x5C: |
| 2027 | mnem = "subsd"; |
| 2028 | break; |
| 2029 | case 0x5D: |
| 2030 | mnem = "minsd"; |
| 2031 | break; |
| 2032 | case 0x5E: |
| 2033 | mnem = "divsd"; |
| 2034 | break; |
| 2035 | case 0x5F: |
| 2036 | mnem = "maxsd"; |
| 2037 | break; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2038 | } |
| 2039 | data += 3; |
| 2040 | int mod, regop, rm; |
| 2041 | get_modrm(*data, &mod, ®op, &rm); |
| 2042 | if (b2 == 0x2A) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2043 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2044 | data += PrintRightOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2045 | } else if (b2 == 0x2C || b2 == 0x2D) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2046 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 2047 | data += PrintRightXMMOperand(data); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2048 | } else if (b2 == 0xC2) { |
| 2049 | // Intel manual 2A, Table 3-18. |
| 2050 | const char* const pseudo_op[] = { |
| 2051 | "cmpeqsd", |
| 2052 | "cmpltsd", |
| 2053 | "cmplesd", |
| 2054 | "cmpunordsd", |
| 2055 | "cmpneqsd", |
| 2056 | "cmpnltsd", |
| 2057 | "cmpnlesd", |
| 2058 | "cmpordsd" |
| 2059 | }; |
| 2060 | AppendToBuffer("%s %s,%s", |
| 2061 | pseudo_op[data[1]], |
| 2062 | NameOfXMMRegister(regop), |
| 2063 | NameOfXMMRegister(rm)); |
| 2064 | data += 2; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2065 | } else { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2066 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2067 | data += PrintRightXMMOperand(data); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2068 | } |
| 2069 | } |
| 2070 | } else { |
| 2071 | UnimplementedInstruction(); |
| 2072 | } |
| 2073 | break; |
| 2074 | |
| 2075 | case 0xF3: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2076 | if (*(data+1) == 0x0F) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2077 | byte b2 = *(data+2); |
| 2078 | if (b2 == 0x11) { |
| 2079 | AppendToBuffer("movss "); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2080 | data += 3; |
| 2081 | int mod, regop, rm; |
| 2082 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2083 | data += PrintRightXMMOperand(data); |
| 2084 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
| 2085 | } else if (b2 == 0x10) { |
| 2086 | data += 3; |
| 2087 | int mod, regop, rm; |
| 2088 | get_modrm(*data, &mod, ®op, &rm); |
| 2089 | AppendToBuffer("movss %s,", NameOfXMMRegister(regop)); |
| 2090 | data += PrintRightXMMOperand(data); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2091 | } else if (b2 == 0x5A) { |
| 2092 | data += 3; |
| 2093 | int mod, regop, rm; |
| 2094 | get_modrm(*data, &mod, ®op, &rm); |
| 2095 | AppendToBuffer("cvtss2sd %s,", NameOfXMMRegister(regop)); |
| 2096 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2097 | } else if (b2 == 0x6F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2098 | data += 3; |
| 2099 | int mod, regop, rm; |
| 2100 | get_modrm(*data, &mod, ®op, &rm); |
| 2101 | AppendToBuffer("movdqu %s,", NameOfXMMRegister(regop)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2102 | data += PrintRightXMMOperand(data); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2103 | } else if (b2 == 0x7F) { |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2104 | AppendToBuffer("movdqu "); |
| 2105 | data += 3; |
| 2106 | int mod, regop, rm; |
| 2107 | get_modrm(*data, &mod, ®op, &rm); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2108 | data += PrintRightXMMOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2109 | AppendToBuffer(",%s", NameOfXMMRegister(regop)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2110 | } else if (b2 == 0xB8) { |
| 2111 | data += 3; |
| 2112 | int mod, regop, rm; |
| 2113 | get_modrm(*data, &mod, ®op, &rm); |
| 2114 | AppendToBuffer("popcnt %s,", NameOfCPURegister(regop)); |
| 2115 | data += PrintRightOperand(data); |
| 2116 | } else if (b2 == 0xBC) { |
| 2117 | data += 3; |
| 2118 | int mod, regop, rm; |
| 2119 | get_modrm(*data, &mod, ®op, &rm); |
| 2120 | AppendToBuffer("tzcnt %s,", NameOfCPURegister(regop)); |
| 2121 | data += PrintRightOperand(data); |
| 2122 | } else if (b2 == 0xBD) { |
| 2123 | data += 3; |
| 2124 | int mod, regop, rm; |
| 2125 | get_modrm(*data, &mod, ®op, &rm); |
| 2126 | AppendToBuffer("lzcnt %s,", NameOfCPURegister(regop)); |
| 2127 | data += PrintRightOperand(data); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2128 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2129 | const char* mnem = "?"; |
| 2130 | switch (b2) { |
| 2131 | case 0x2A: |
| 2132 | mnem = "cvtsi2ss"; |
| 2133 | break; |
| 2134 | case 0x2C: |
| 2135 | mnem = "cvttss2si"; |
| 2136 | break; |
| 2137 | case 0x2D: |
| 2138 | mnem = "cvtss2si"; |
| 2139 | break; |
| 2140 | case 0x51: |
| 2141 | mnem = "sqrtss"; |
| 2142 | break; |
| 2143 | case 0x58: |
| 2144 | mnem = "addss"; |
| 2145 | break; |
| 2146 | case 0x59: |
| 2147 | mnem = "mulss"; |
| 2148 | break; |
| 2149 | case 0x5C: |
| 2150 | mnem = "subss"; |
| 2151 | break; |
| 2152 | case 0x5D: |
| 2153 | mnem = "minss"; |
| 2154 | break; |
| 2155 | case 0x5E: |
| 2156 | mnem = "divss"; |
| 2157 | break; |
| 2158 | case 0x5F: |
| 2159 | mnem = "maxss"; |
| 2160 | break; |
| 2161 | } |
| 2162 | data += 3; |
| 2163 | int mod, regop, rm; |
| 2164 | get_modrm(*data, &mod, ®op, &rm); |
| 2165 | if (b2 == 0x2A) { |
| 2166 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2167 | data += PrintRightOperand(data); |
| 2168 | } else if (b2 == 0x2C || b2 == 0x2D) { |
| 2169 | AppendToBuffer("%s %s,", mnem, NameOfCPURegister(regop)); |
| 2170 | data += PrintRightXMMOperand(data); |
| 2171 | } else if (b2 == 0xC2) { |
| 2172 | // Intel manual 2A, Table 3-18. |
| 2173 | const char* const pseudo_op[] = { |
| 2174 | "cmpeqss", "cmpltss", "cmpless", "cmpunordss", |
| 2175 | "cmpneqss", "cmpnltss", "cmpnless", "cmpordss"}; |
| 2176 | AppendToBuffer("%s %s,%s", pseudo_op[data[1]], |
| 2177 | NameOfXMMRegister(regop), NameOfXMMRegister(rm)); |
| 2178 | data += 2; |
| 2179 | } else { |
| 2180 | AppendToBuffer("%s %s,", mnem, NameOfXMMRegister(regop)); |
| 2181 | data += PrintRightXMMOperand(data); |
| 2182 | } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2183 | } |
| 2184 | } else if (*(data+1) == 0xA5) { |
| 2185 | data += 2; |
| 2186 | AppendToBuffer("rep_movs"); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2187 | } else if (*(data+1) == 0xAB) { |
| 2188 | data += 2; |
| 2189 | AppendToBuffer("rep_stos"); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2190 | } else { |
| 2191 | UnimplementedInstruction(); |
| 2192 | } |
| 2193 | break; |
| 2194 | |
| 2195 | case 0xF7: |
| 2196 | data += F7Instruction(data); |
| 2197 | break; |
| 2198 | |
| 2199 | default: |
| 2200 | UnimplementedInstruction(); |
| 2201 | } |
| 2202 | } |
| 2203 | |
| 2204 | if (tmp_buffer_pos_ < sizeof tmp_buffer_) { |
| 2205 | tmp_buffer_[tmp_buffer_pos_] = '\0'; |
| 2206 | } |
| 2207 | |
| 2208 | int instr_len = data - instr; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 2209 | if (instr_len == 0) { |
| 2210 | printf("%02x", *data); |
| 2211 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2212 | DCHECK(instr_len > 0); // Ensure progress. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2213 | |
| 2214 | int outp = 0; |
| 2215 | // Instruction bytes. |
| 2216 | for (byte* bp = instr; bp < data; bp++) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2217 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2218 | "%02x", |
| 2219 | *bp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2220 | } |
| 2221 | for (int i = 6 - instr_len; i >= 0; i--) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2222 | outp += v8::internal::SNPrintF(out_buffer + outp, " "); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2223 | } |
| 2224 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2225 | outp += v8::internal::SNPrintF(out_buffer + outp, |
| 2226 | " %s", |
| 2227 | tmp_buffer_.start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2228 | return instr_len; |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2229 | } // NOLINT (function is too long) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2230 | |
| 2231 | |
| 2232 | //------------------------------------------------------------------------------ |
| 2233 | |
| 2234 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2235 | static const char* const cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2236 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi" |
| 2237 | }; |
| 2238 | |
| 2239 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2240 | static const char* const byte_cpu_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2241 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 2242 | }; |
| 2243 | |
| 2244 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2245 | static const char* const xmm_regs[8] = { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2246 | "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7" |
| 2247 | }; |
| 2248 | |
| 2249 | |
| 2250 | const char* NameConverter::NameOfAddress(byte* addr) const { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2251 | v8::internal::SNPrintF(tmp_buffer_, "%p", static_cast<void*>(addr)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2252 | return tmp_buffer_.start(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2253 | } |
| 2254 | |
| 2255 | |
| 2256 | const char* NameConverter::NameOfConstant(byte* addr) const { |
| 2257 | return NameOfAddress(addr); |
| 2258 | } |
| 2259 | |
| 2260 | |
| 2261 | const char* NameConverter::NameOfCPURegister(int reg) const { |
| 2262 | if (0 <= reg && reg < 8) return cpu_regs[reg]; |
| 2263 | return "noreg"; |
| 2264 | } |
| 2265 | |
| 2266 | |
| 2267 | const char* NameConverter::NameOfByteCPURegister(int reg) const { |
| 2268 | if (0 <= reg && reg < 8) return byte_cpu_regs[reg]; |
| 2269 | return "noreg"; |
| 2270 | } |
| 2271 | |
| 2272 | |
| 2273 | const char* NameConverter::NameOfXMMRegister(int reg) const { |
| 2274 | if (0 <= reg && reg < 8) return xmm_regs[reg]; |
| 2275 | return "noxmmreg"; |
| 2276 | } |
| 2277 | |
| 2278 | |
| 2279 | const char* NameConverter::NameInCode(byte* addr) const { |
| 2280 | // IA32 does not embed debug strings at the moment. |
| 2281 | UNREACHABLE(); |
| 2282 | return ""; |
| 2283 | } |
| 2284 | |
| 2285 | |
| 2286 | //------------------------------------------------------------------------------ |
| 2287 | |
| 2288 | Disassembler::Disassembler(const NameConverter& converter) |
| 2289 | : converter_(converter) {} |
| 2290 | |
| 2291 | |
| 2292 | Disassembler::~Disassembler() {} |
| 2293 | |
| 2294 | |
| 2295 | int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 2296 | byte* instruction) { |
| 2297 | DisassemblerIA32 d(converter_, false /*do not crash if unimplemented*/); |
| 2298 | return d.InstructionDecode(buffer, instruction); |
| 2299 | } |
| 2300 | |
| 2301 | |
| 2302 | // The IA-32 assembler does not currently use constant pools. |
| 2303 | int Disassembler::ConstantPoolSizeAt(byte* instruction) { return -1; } |
| 2304 | |
| 2305 | |
| 2306 | /*static*/ void Disassembler::Disassemble(FILE* f, byte* begin, byte* end) { |
| 2307 | NameConverter converter; |
| 2308 | Disassembler d(converter); |
| 2309 | for (byte* pc = begin; pc < end;) { |
| 2310 | v8::internal::EmbeddedVector<char, 128> buffer; |
| 2311 | buffer[0] = '\0'; |
| 2312 | byte* prev_pc = pc; |
| 2313 | pc += d.InstructionDecode(buffer, pc); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2314 | fprintf(f, "%p", static_cast<void*>(prev_pc)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2315 | fprintf(f, " "); |
| 2316 | |
| 2317 | for (byte* bp = prev_pc; bp < pc; bp++) { |
| 2318 | fprintf(f, "%02x", *bp); |
| 2319 | } |
| 2320 | for (int i = 6 - (pc - prev_pc); i >= 0; i--) { |
| 2321 | fprintf(f, " "); |
| 2322 | } |
| 2323 | fprintf(f, " %s\n", buffer.start()); |
| 2324 | } |
| 2325 | } |
| 2326 | |
| 2327 | |
| 2328 | } // namespace disasm |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 2329 | |
| 2330 | #endif // V8_TARGET_ARCH_IA32 |