Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "disassembler_x86.h" |
| 18 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 19 | #include <iostream> |
| 20 | |
Elliott Hughes | 07ed66b | 2012-12-12 18:34:25 -0800 | [diff] [blame] | 21 | #include "base/logging.h" |
Elliott Hughes | e222ee0 | 2012-12-13 14:41:43 -0800 | [diff] [blame] | 22 | #include "base/stringprintf.h" |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 23 | #include "thread.h" |
Yixin Shou | 5192cbb | 2014-07-01 13:48:17 -0400 | [diff] [blame] | 24 | #include <inttypes.h> |
Elliott Hughes | 0f3c553 | 2012-03-30 14:51:51 -0700 | [diff] [blame] | 25 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 26 | namespace art { |
| 27 | namespace x86 { |
| 28 | |
Ian Rogers | b23a772 | 2012-10-09 16:54:26 -0700 | [diff] [blame] | 29 | size_t DisassemblerX86::Dump(std::ostream& os, const uint8_t* begin) { |
| 30 | return DumpInstruction(os, begin); |
| 31 | } |
| 32 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 33 | void DisassemblerX86::Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) { |
| 34 | size_t length = 0; |
| 35 | for (const uint8_t* cur = begin; cur < end; cur += length) { |
| 36 | length = DumpInstruction(os, cur); |
| 37 | } |
| 38 | } |
| 39 | |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 40 | static const char* gReg8Names[] = { |
| 41 | "al", "cl", "dl", "bl", "ah", "ch", "dh", "bh" |
| 42 | }; |
| 43 | static const char* gExtReg8Names[] = { |
| 44 | "al", "cl", "dl", "bl", "spl", "bpl", "sil", "dil", |
| 45 | "r8l", "r9l", "r10l", "r11l", "r12l", "r13l", "r14l", "r15l" |
| 46 | }; |
| 47 | static const char* gReg16Names[] = { |
| 48 | "ax", "cx", "dx", "bx", "sp", "bp", "si", "di", |
| 49 | "r8w", "r9w", "r10w", "r11w", "r12w", "r13w", "r14w", "r15w" |
| 50 | }; |
| 51 | static const char* gReg32Names[] = { |
| 52 | "eax", "ecx", "edx", "ebx", "esp", "ebp", "esi", "edi", |
| 53 | "r8d", "r9d", "r10d", "r11d", "r12d", "r13d", "r14d", "r15d" |
| 54 | }; |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 55 | static const char* gReg64Names[] = { |
| 56 | "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 57 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 58 | }; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 59 | |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 60 | // 64-bit opcode REX modifier. |
| 61 | constexpr uint8_t REX_W = 0b1000; |
| 62 | constexpr uint8_t REX_R = 0b0100; |
| 63 | constexpr uint8_t REX_X = 0b0010; |
| 64 | constexpr uint8_t REX_B = 0b0001; |
| 65 | |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 66 | static void DumpReg0(std::ostream& os, uint8_t rex, size_t reg, |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 67 | bool byte_operand, uint8_t size_override) { |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 68 | DCHECK_LT(reg, (rex == 0) ? 8u : 16u); |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 69 | bool rex_w = (rex & REX_W) != 0; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 70 | if (byte_operand) { |
| 71 | os << ((rex == 0) ? gReg8Names[reg] : gExtReg8Names[reg]); |
| 72 | } else if (rex_w) { |
| 73 | os << gReg64Names[reg]; |
| 74 | } else if (size_override == 0x66) { |
| 75 | os << gReg16Names[reg]; |
| 76 | } else { |
| 77 | os << gReg32Names[reg]; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 78 | } |
| 79 | } |
| 80 | |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 81 | enum RegFile { GPR, MMX, SSE }; |
| 82 | |
Mark Mendell | 88649c7 | 2014-06-04 21:20:00 -0400 | [diff] [blame] | 83 | static void DumpAnyReg(std::ostream& os, uint8_t rex, size_t reg, |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 84 | bool byte_operand, uint8_t size_override, RegFile reg_file) { |
| 85 | if (reg_file == GPR) { |
| 86 | DumpReg0(os, rex, reg, byte_operand, size_override); |
| 87 | } else if (reg_file == SSE) { |
| 88 | os << "xmm" << reg; |
| 89 | } else { |
| 90 | os << "mm" << reg; |
| 91 | } |
| 92 | } |
| 93 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 94 | static void DumpReg(std::ostream& os, uint8_t rex, uint8_t reg, |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 95 | bool byte_operand, uint8_t size_override, RegFile reg_file) { |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 96 | bool rex_r = (rex & REX_R) != 0; |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 97 | size_t reg_num = rex_r ? (reg + 8) : reg; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 98 | DumpAnyReg(os, rex, reg_num, byte_operand, size_override, reg_file); |
| 99 | } |
| 100 | |
| 101 | static void DumpRmReg(std::ostream& os, uint8_t rex, uint8_t reg, |
| 102 | bool byte_operand, uint8_t size_override, RegFile reg_file) { |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 103 | bool rex_b = (rex & REX_B) != 0; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 104 | size_t reg_num = rex_b ? (reg + 8) : reg; |
| 105 | DumpAnyReg(os, rex, reg_num, byte_operand, size_override, reg_file); |
| 106 | } |
| 107 | |
| 108 | static void DumpAddrReg(std::ostream& os, uint8_t rex, uint8_t reg) { |
| 109 | if (rex != 0) { |
| 110 | os << gReg64Names[reg]; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 111 | } else { |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 112 | os << gReg32Names[reg]; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 113 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 114 | } |
| 115 | |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 116 | static void DumpBaseReg(std::ostream& os, uint8_t rex, uint8_t reg) { |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 117 | bool rex_b = (rex & REX_B) != 0; |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 118 | size_t reg_num = rex_b ? (reg + 8) : reg; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 119 | DumpAddrReg(os, rex, reg_num); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 122 | static void DumpIndexReg(std::ostream& os, uint8_t rex, uint8_t reg) { |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 123 | bool rex_x = (rex & REX_X) != 0; |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 124 | uint8_t reg_num = rex_x ? (reg + 8) : reg; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 125 | DumpAddrReg(os, rex, reg_num); |
| 126 | } |
| 127 | |
| 128 | static void DumpOpcodeReg(std::ostream& os, uint8_t rex, uint8_t reg) { |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 129 | bool rex_b = (rex & REX_B) != 0; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 130 | size_t reg_num = rex_b ? (reg + 8) : reg; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 131 | DumpReg0(os, rex, reg_num, false, 0); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 132 | } |
| 133 | |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 134 | enum SegmentPrefix { |
| 135 | kCs = 0x2e, |
| 136 | kSs = 0x36, |
| 137 | kDs = 0x3e, |
| 138 | kEs = 0x26, |
| 139 | kFs = 0x64, |
| 140 | kGs = 0x65, |
| 141 | }; |
| 142 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 143 | static void DumpSegmentOverride(std::ostream& os, uint8_t segment_prefix) { |
| 144 | switch (segment_prefix) { |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 145 | case kCs: os << "cs:"; break; |
| 146 | case kSs: os << "ss:"; break; |
| 147 | case kDs: os << "ds:"; break; |
| 148 | case kEs: os << "es:"; break; |
| 149 | case kFs: os << "fs:"; break; |
| 150 | case kGs: os << "gs:"; break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 151 | default: break; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | size_t DisassemblerX86::DumpInstruction(std::ostream& os, const uint8_t* instr) { |
| 156 | const uint8_t* begin_instr = instr; |
| 157 | bool have_prefixes = true; |
| 158 | uint8_t prefix[4] = {0, 0, 0, 0}; |
| 159 | const char** modrm_opcodes = NULL; |
| 160 | do { |
| 161 | switch (*instr) { |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 162 | // Group 1 - lock and repeat prefixes: |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 163 | case 0xF0: |
| 164 | case 0xF2: |
| 165 | case 0xF3: |
| 166 | prefix[0] = *instr; |
| 167 | break; |
| 168 | // Group 2 - segment override prefixes: |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 169 | case kCs: |
| 170 | case kSs: |
| 171 | case kDs: |
| 172 | case kEs: |
| 173 | case kFs: |
| 174 | case kGs: |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 175 | prefix[1] = *instr; |
| 176 | break; |
| 177 | // Group 3 - operand size override: |
| 178 | case 0x66: |
| 179 | prefix[2] = *instr; |
| 180 | break; |
| 181 | // Group 4 - address size override: |
| 182 | case 0x67: |
| 183 | prefix[3] = *instr; |
| 184 | break; |
| 185 | default: |
| 186 | have_prefixes = false; |
| 187 | break; |
| 188 | } |
| 189 | if (have_prefixes) { |
| 190 | instr++; |
| 191 | } |
| 192 | } while (have_prefixes); |
Ian Rogers | 38e1203 | 2014-03-14 14:06:14 -0700 | [diff] [blame] | 193 | uint8_t rex = (supports_rex_ && (*instr >= 0x40) && (*instr <= 0x4F)) ? *instr : 0; |
Vladimir Kostyukov | e8861b3 | 2014-04-18 17:06:15 +0700 | [diff] [blame] | 194 | if (rex != 0) { |
| 195 | instr++; |
| 196 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 197 | bool has_modrm = false; |
| 198 | bool reg_is_opcode = false; |
| 199 | size_t immediate_bytes = 0; |
| 200 | size_t branch_bytes = 0; |
| 201 | std::ostringstream opcode; |
| 202 | bool store = false; // stores to memory (ie rm is on the left) |
| 203 | bool load = false; // loads from memory (ie rm is on the right) |
Serguei Katkov | 94f3eb0 | 2014-06-24 13:23:17 +0700 | [diff] [blame^] | 204 | bool byte_operand = false; // true when the opcode is dealing with byte operands |
| 205 | bool byte_second_operand = false; // true when the source operand is a byte register but the target register isn't (ie movsxb/movzxb). |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 206 | bool target_specific = false; // register name depends on target (64 vs 32 bits). |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 207 | bool ax = false; // implicit use of ax |
jeffhao | e296248 | 2012-06-28 11:29:57 -0700 | [diff] [blame] | 208 | bool cx = false; // implicit use of cx |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 209 | bool reg_in_opcode = false; // low 3-bits of opcode encode register parameter |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 210 | bool no_ops = false; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 211 | RegFile src_reg_file = GPR; |
| 212 | RegFile dst_reg_file = GPR; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 213 | switch (*instr) { |
| 214 | #define DISASSEMBLER_ENTRY(opname, \ |
| 215 | rm8_r8, rm32_r32, \ |
| 216 | r8_rm8, r32_rm32, \ |
| 217 | ax8_i8, ax32_i32) \ |
| 218 | case rm8_r8: opcode << #opname; store = true; has_modrm = true; byte_operand = true; break; \ |
| 219 | case rm32_r32: opcode << #opname; store = true; has_modrm = true; break; \ |
| 220 | case r8_rm8: opcode << #opname; load = true; has_modrm = true; byte_operand = true; break; \ |
| 221 | case r32_rm32: opcode << #opname; load = true; has_modrm = true; break; \ |
| 222 | case ax8_i8: opcode << #opname; ax = true; immediate_bytes = 1; byte_operand = true; break; \ |
| 223 | case ax32_i32: opcode << #opname; ax = true; immediate_bytes = 4; break; |
| 224 | |
| 225 | DISASSEMBLER_ENTRY(add, |
| 226 | 0x00 /* RegMem8/Reg8 */, 0x01 /* RegMem32/Reg32 */, |
| 227 | 0x02 /* Reg8/RegMem8 */, 0x03 /* Reg32/RegMem32 */, |
| 228 | 0x04 /* Rax8/imm8 opcode */, 0x05 /* Rax32/imm32 */) |
| 229 | DISASSEMBLER_ENTRY(or, |
| 230 | 0x08 /* RegMem8/Reg8 */, 0x09 /* RegMem32/Reg32 */, |
| 231 | 0x0A /* Reg8/RegMem8 */, 0x0B /* Reg32/RegMem32 */, |
| 232 | 0x0C /* Rax8/imm8 opcode */, 0x0D /* Rax32/imm32 */) |
| 233 | DISASSEMBLER_ENTRY(adc, |
| 234 | 0x10 /* RegMem8/Reg8 */, 0x11 /* RegMem32/Reg32 */, |
| 235 | 0x12 /* Reg8/RegMem8 */, 0x13 /* Reg32/RegMem32 */, |
| 236 | 0x14 /* Rax8/imm8 opcode */, 0x15 /* Rax32/imm32 */) |
| 237 | DISASSEMBLER_ENTRY(sbb, |
| 238 | 0x18 /* RegMem8/Reg8 */, 0x19 /* RegMem32/Reg32 */, |
| 239 | 0x1A /* Reg8/RegMem8 */, 0x1B /* Reg32/RegMem32 */, |
| 240 | 0x1C /* Rax8/imm8 opcode */, 0x1D /* Rax32/imm32 */) |
| 241 | DISASSEMBLER_ENTRY(and, |
| 242 | 0x20 /* RegMem8/Reg8 */, 0x21 /* RegMem32/Reg32 */, |
| 243 | 0x22 /* Reg8/RegMem8 */, 0x23 /* Reg32/RegMem32 */, |
| 244 | 0x24 /* Rax8/imm8 opcode */, 0x25 /* Rax32/imm32 */) |
| 245 | DISASSEMBLER_ENTRY(sub, |
| 246 | 0x28 /* RegMem8/Reg8 */, 0x29 /* RegMem32/Reg32 */, |
| 247 | 0x2A /* Reg8/RegMem8 */, 0x2B /* Reg32/RegMem32 */, |
| 248 | 0x2C /* Rax8/imm8 opcode */, 0x2D /* Rax32/imm32 */) |
| 249 | DISASSEMBLER_ENTRY(xor, |
| 250 | 0x30 /* RegMem8/Reg8 */, 0x31 /* RegMem32/Reg32 */, |
| 251 | 0x32 /* Reg8/RegMem8 */, 0x33 /* Reg32/RegMem32 */, |
| 252 | 0x34 /* Rax8/imm8 opcode */, 0x35 /* Rax32/imm32 */) |
| 253 | DISASSEMBLER_ENTRY(cmp, |
| 254 | 0x38 /* RegMem8/Reg8 */, 0x39 /* RegMem32/Reg32 */, |
| 255 | 0x3A /* Reg8/RegMem8 */, 0x3B /* Reg32/RegMem32 */, |
| 256 | 0x3C /* Rax8/imm8 opcode */, 0x3D /* Rax32/imm32 */) |
| 257 | |
| 258 | #undef DISASSEMBLER_ENTRY |
| 259 | case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57: |
| 260 | opcode << "push"; |
| 261 | reg_in_opcode = true; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 262 | target_specific = true; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 263 | break; |
| 264 | case 0x58: case 0x59: case 0x5A: case 0x5B: case 0x5C: case 0x5D: case 0x5E: case 0x5F: |
| 265 | opcode << "pop"; |
| 266 | reg_in_opcode = true; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 267 | target_specific = true; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 268 | break; |
Mark Mendell | 33ecf8d | 2014-06-06 15:19:45 -0400 | [diff] [blame] | 269 | case 0x63: |
| 270 | if (rex == 0x48) { |
| 271 | opcode << "movsxd"; |
| 272 | has_modrm = true; |
| 273 | load = true; |
| 274 | } else { |
| 275 | // In 32-bit mode (!supports_rex_) this is ARPL, with no REX prefix the functionality is the |
| 276 | // same as 'mov' but the use of the instruction is discouraged. |
| 277 | opcode << StringPrintf("unknown opcode '%02X'", *instr); |
| 278 | } |
| 279 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 280 | case 0x68: opcode << "push"; immediate_bytes = 4; break; |
Mark Mendell | d19b55a | 2013-12-12 09:55:34 -0800 | [diff] [blame] | 281 | case 0x69: opcode << "imul"; load = true; has_modrm = true; immediate_bytes = 4; break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 282 | case 0x6A: opcode << "push"; immediate_bytes = 1; break; |
Mark Mendell | d19b55a | 2013-12-12 09:55:34 -0800 | [diff] [blame] | 283 | case 0x6B: opcode << "imul"; load = true; has_modrm = true; immediate_bytes = 1; break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 284 | case 0x70: case 0x71: case 0x72: case 0x73: case 0x74: case 0x75: case 0x76: case 0x77: |
| 285 | case 0x78: case 0x79: case 0x7A: case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F: |
| 286 | static const char* condition_codes[] = |
Elliott Hughes | b25c3f6 | 2012-03-26 16:35:06 -0700 | [diff] [blame] | 287 | {"o", "no", "b/nae/c", "nb/ae/nc", "z/eq", "nz/ne", "be/na", "nbe/a", |
| 288 | "s", "ns", "p/pe", "np/po", "l/nge", "nl/ge", "le/ng", "nle/g" |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 289 | }; |
| 290 | opcode << "j" << condition_codes[*instr & 0xF]; |
| 291 | branch_bytes = 1; |
| 292 | break; |
Razvan A Lupusoru | 99ad723 | 2014-02-25 17:41:08 -0800 | [diff] [blame] | 293 | case 0x86: case 0x87: |
| 294 | opcode << "xchg"; |
| 295 | store = true; |
| 296 | has_modrm = true; |
| 297 | byte_operand = (*instr == 0x86); |
| 298 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 299 | case 0x88: opcode << "mov"; store = true; has_modrm = true; byte_operand = true; break; |
| 300 | case 0x89: opcode << "mov"; store = true; has_modrm = true; break; |
| 301 | case 0x8A: opcode << "mov"; load = true; has_modrm = true; byte_operand = true; break; |
| 302 | case 0x8B: opcode << "mov"; load = true; has_modrm = true; break; |
| 303 | |
| 304 | case 0x0F: // 2 byte extended opcode |
| 305 | instr++; |
| 306 | switch (*instr) { |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 307 | case 0x10: case 0x11: |
| 308 | if (prefix[0] == 0xF2) { |
| 309 | opcode << "movsd"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 310 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 311 | } else if (prefix[0] == 0xF3) { |
| 312 | opcode << "movss"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 313 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 314 | } else if (prefix[2] == 0x66) { |
| 315 | opcode << "movupd"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 316 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 317 | } else { |
| 318 | opcode << "movups"; |
| 319 | } |
| 320 | has_modrm = true; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 321 | src_reg_file = dst_reg_file = SSE; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 322 | load = *instr == 0x10; |
| 323 | store = !load; |
| 324 | break; |
Razvan A Lupusoru | 2c498d1 | 2014-01-29 16:02:57 -0800 | [diff] [blame] | 325 | case 0x12: case 0x13: |
| 326 | if (prefix[2] == 0x66) { |
| 327 | opcode << "movlpd"; |
| 328 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 329 | } else if (prefix[0] == 0) { |
| 330 | opcode << "movlps"; |
| 331 | } |
| 332 | has_modrm = true; |
| 333 | src_reg_file = dst_reg_file = SSE; |
| 334 | load = *instr == 0x12; |
| 335 | store = !load; |
| 336 | break; |
| 337 | case 0x16: case 0x17: |
| 338 | if (prefix[2] == 0x66) { |
| 339 | opcode << "movhpd"; |
| 340 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 341 | } else if (prefix[0] == 0) { |
| 342 | opcode << "movhps"; |
| 343 | } |
| 344 | has_modrm = true; |
| 345 | src_reg_file = dst_reg_file = SSE; |
| 346 | load = *instr == 0x16; |
| 347 | store = !load; |
| 348 | break; |
| 349 | case 0x28: case 0x29: |
| 350 | if (prefix[2] == 0x66) { |
| 351 | opcode << "movapd"; |
| 352 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 353 | } else if (prefix[0] == 0) { |
| 354 | opcode << "movaps"; |
| 355 | } |
| 356 | has_modrm = true; |
| 357 | src_reg_file = dst_reg_file = SSE; |
| 358 | load = *instr == 0x28; |
| 359 | store = !load; |
| 360 | break; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 361 | case 0x2A: |
| 362 | if (prefix[2] == 0x66) { |
| 363 | opcode << "cvtpi2pd"; |
| 364 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 365 | } else if (prefix[0] == 0xF2) { |
| 366 | opcode << "cvtsi2sd"; |
| 367 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 368 | } else if (prefix[0] == 0xF3) { |
| 369 | opcode << "cvtsi2ss"; |
| 370 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 371 | } else { |
| 372 | opcode << "cvtpi2ps"; |
| 373 | } |
| 374 | load = true; |
| 375 | has_modrm = true; |
| 376 | dst_reg_file = SSE; |
| 377 | break; |
| 378 | case 0x2C: |
| 379 | if (prefix[2] == 0x66) { |
| 380 | opcode << "cvttpd2pi"; |
| 381 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 382 | } else if (prefix[0] == 0xF2) { |
| 383 | opcode << "cvttsd2si"; |
| 384 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 385 | } else if (prefix[0] == 0xF3) { |
| 386 | opcode << "cvttss2si"; |
| 387 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 388 | } else { |
| 389 | opcode << "cvttps2pi"; |
| 390 | } |
| 391 | load = true; |
| 392 | has_modrm = true; |
| 393 | src_reg_file = SSE; |
| 394 | break; |
| 395 | case 0x2D: |
| 396 | if (prefix[2] == 0x66) { |
| 397 | opcode << "cvtpd2pi"; |
| 398 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 399 | } else if (prefix[0] == 0xF2) { |
| 400 | opcode << "cvtsd2si"; |
| 401 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 402 | } else if (prefix[0] == 0xF3) { |
| 403 | opcode << "cvtss2si"; |
| 404 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 405 | } else { |
| 406 | opcode << "cvtps2pi"; |
| 407 | } |
| 408 | load = true; |
| 409 | has_modrm = true; |
| 410 | src_reg_file = SSE; |
| 411 | break; |
| 412 | case 0x2E: |
| 413 | opcode << "u"; |
| 414 | // FALLTHROUGH |
| 415 | case 0x2F: |
| 416 | if (prefix[2] == 0x66) { |
| 417 | opcode << "comisd"; |
| 418 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 419 | } else { |
| 420 | opcode << "comiss"; |
| 421 | } |
| 422 | has_modrm = true; |
| 423 | load = true; |
| 424 | src_reg_file = dst_reg_file = SSE; |
| 425 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 426 | case 0x38: // 3 byte extended opcode |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 427 | instr++; |
| 428 | if (prefix[2] == 0x66) { |
| 429 | switch (*instr) { |
| 430 | case 0x40: |
| 431 | opcode << "pmulld"; |
| 432 | prefix[2] = 0; |
| 433 | has_modrm = true; |
| 434 | load = true; |
| 435 | src_reg_file = dst_reg_file = SSE; |
| 436 | break; |
| 437 | default: |
| 438 | opcode << StringPrintf("unknown opcode '0F 38 %02X'", *instr); |
| 439 | } |
| 440 | } else { |
| 441 | opcode << StringPrintf("unknown opcode '0F 38 %02X'", *instr); |
| 442 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 443 | break; |
| 444 | case 0x3A: // 3 byte extended opcode |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 445 | instr++; |
| 446 | if (prefix[2] == 0x66) { |
| 447 | switch (*instr) { |
| 448 | case 0x14: |
| 449 | opcode << "pextrb"; |
| 450 | prefix[2] = 0; |
| 451 | has_modrm = true; |
| 452 | store = true; |
| 453 | dst_reg_file = SSE; |
| 454 | immediate_bytes = 1; |
| 455 | break; |
| 456 | case 0x16: |
| 457 | opcode << "pextrd"; |
| 458 | prefix[2] = 0; |
| 459 | has_modrm = true; |
| 460 | store = true; |
| 461 | dst_reg_file = SSE; |
| 462 | immediate_bytes = 1; |
| 463 | break; |
| 464 | default: |
| 465 | opcode << StringPrintf("unknown opcode '0F 3A %02X'", *instr); |
| 466 | } |
| 467 | } else { |
| 468 | opcode << StringPrintf("unknown opcode '0F 3A %02X'", *instr); |
| 469 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 470 | break; |
Razvan A Lupusoru | bd288c2 | 2013-12-20 17:27:23 -0800 | [diff] [blame] | 471 | case 0x40: case 0x41: case 0x42: case 0x43: case 0x44: case 0x45: case 0x46: case 0x47: |
| 472 | case 0x48: case 0x49: case 0x4A: case 0x4B: case 0x4C: case 0x4D: case 0x4E: case 0x4F: |
| 473 | opcode << "cmov" << condition_codes[*instr & 0xF]; |
| 474 | has_modrm = true; |
| 475 | load = true; |
| 476 | break; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 477 | case 0x50: case 0x51: case 0x52: case 0x53: case 0x54: case 0x55: case 0x56: case 0x57: |
| 478 | case 0x58: case 0x59: case 0x5C: case 0x5D: case 0x5E: case 0x5F: { |
| 479 | switch (*instr) { |
| 480 | case 0x50: opcode << "movmsk"; break; |
| 481 | case 0x51: opcode << "sqrt"; break; |
| 482 | case 0x52: opcode << "rsqrt"; break; |
| 483 | case 0x53: opcode << "rcp"; break; |
| 484 | case 0x54: opcode << "and"; break; |
| 485 | case 0x55: opcode << "andn"; break; |
| 486 | case 0x56: opcode << "or"; break; |
| 487 | case 0x57: opcode << "xor"; break; |
| 488 | case 0x58: opcode << "add"; break; |
| 489 | case 0x59: opcode << "mul"; break; |
| 490 | case 0x5C: opcode << "sub"; break; |
| 491 | case 0x5D: opcode << "min"; break; |
| 492 | case 0x5E: opcode << "div"; break; |
| 493 | case 0x5F: opcode << "max"; break; |
| 494 | default: LOG(FATAL) << "Unreachable"; |
| 495 | } |
| 496 | if (prefix[2] == 0x66) { |
| 497 | opcode << "pd"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 498 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 499 | } else if (prefix[0] == 0xF2) { |
| 500 | opcode << "sd"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 501 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 502 | } else if (prefix[0] == 0xF3) { |
| 503 | opcode << "ss"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 504 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 505 | } else { |
| 506 | opcode << "ps"; |
| 507 | } |
| 508 | load = true; |
| 509 | has_modrm = true; |
| 510 | src_reg_file = dst_reg_file = SSE; |
| 511 | break; |
| 512 | } |
| 513 | case 0x5A: |
| 514 | if (prefix[2] == 0x66) { |
| 515 | opcode << "cvtpd2ps"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 516 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 517 | } else if (prefix[0] == 0xF2) { |
| 518 | opcode << "cvtsd2ss"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 519 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 520 | } else if (prefix[0] == 0xF3) { |
| 521 | opcode << "cvtss2sd"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 522 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 523 | } else { |
| 524 | opcode << "cvtps2pd"; |
| 525 | } |
| 526 | load = true; |
| 527 | has_modrm = true; |
| 528 | src_reg_file = dst_reg_file = SSE; |
| 529 | break; |
| 530 | case 0x5B: |
| 531 | if (prefix[2] == 0x66) { |
| 532 | opcode << "cvtps2dq"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 533 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 534 | } else if (prefix[0] == 0xF2) { |
| 535 | opcode << "bad opcode F2 0F 5B"; |
| 536 | } else if (prefix[0] == 0xF3) { |
| 537 | opcode << "cvttps2dq"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 538 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 539 | } else { |
| 540 | opcode << "cvtdq2ps"; |
| 541 | } |
| 542 | load = true; |
| 543 | has_modrm = true; |
| 544 | src_reg_file = dst_reg_file = SSE; |
| 545 | break; |
Razvan A Lupusoru | d3266bc | 2014-01-24 12:55:31 -0800 | [diff] [blame] | 546 | case 0x62: |
| 547 | if (prefix[2] == 0x66) { |
| 548 | src_reg_file = dst_reg_file = SSE; |
| 549 | prefix[2] = 0; // Clear prefix now. It has served its purpose as part of the opcode. |
| 550 | } else { |
| 551 | src_reg_file = dst_reg_file = MMX; |
| 552 | } |
| 553 | opcode << "punpckldq"; |
| 554 | load = true; |
| 555 | has_modrm = true; |
| 556 | break; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 557 | case 0x6E: |
| 558 | if (prefix[2] == 0x66) { |
| 559 | dst_reg_file = SSE; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 560 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 561 | } else { |
| 562 | dst_reg_file = MMX; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 563 | } |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 564 | opcode << "movd"; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 565 | load = true; |
| 566 | has_modrm = true; |
| 567 | break; |
| 568 | case 0x6F: |
| 569 | if (prefix[2] == 0x66) { |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 570 | src_reg_file = dst_reg_file = SSE; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 571 | opcode << "movdqa"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 572 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 573 | } else if (prefix[0] == 0xF3) { |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 574 | src_reg_file = dst_reg_file = SSE; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 575 | opcode << "movdqu"; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 576 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 577 | } else { |
| 578 | dst_reg_file = MMX; |
| 579 | opcode << "movq"; |
| 580 | } |
| 581 | load = true; |
| 582 | has_modrm = true; |
| 583 | break; |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 584 | case 0x70: |
| 585 | if (prefix[2] == 0x66) { |
| 586 | opcode << "pshufd"; |
| 587 | prefix[2] = 0; |
| 588 | has_modrm = true; |
| 589 | store = true; |
| 590 | src_reg_file = dst_reg_file = SSE; |
| 591 | immediate_bytes = 1; |
| 592 | } else if (prefix[0] == 0xF2) { |
| 593 | opcode << "pshuflw"; |
| 594 | prefix[0] = 0; |
| 595 | has_modrm = true; |
| 596 | store = true; |
| 597 | src_reg_file = dst_reg_file = SSE; |
| 598 | immediate_bytes = 1; |
| 599 | } else { |
| 600 | opcode << StringPrintf("unknown opcode '0F %02X'", *instr); |
| 601 | } |
| 602 | break; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 603 | case 0x71: |
| 604 | if (prefix[2] == 0x66) { |
| 605 | dst_reg_file = SSE; |
| 606 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 607 | } else { |
| 608 | dst_reg_file = MMX; |
| 609 | } |
| 610 | static const char* x71_opcodes[] = {"unknown-71", "unknown-71", "psrlw", "unknown-71", "psraw", "unknown-71", "psllw", "unknown-71"}; |
| 611 | modrm_opcodes = x71_opcodes; |
| 612 | reg_is_opcode = true; |
| 613 | has_modrm = true; |
| 614 | store = true; |
| 615 | immediate_bytes = 1; |
| 616 | break; |
| 617 | case 0x72: |
| 618 | if (prefix[2] == 0x66) { |
| 619 | dst_reg_file = SSE; |
| 620 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 621 | } else { |
| 622 | dst_reg_file = MMX; |
| 623 | } |
| 624 | static const char* x72_opcodes[] = {"unknown-72", "unknown-72", "psrld", "unknown-72", "psrad", "unknown-72", "pslld", "unknown-72"}; |
| 625 | modrm_opcodes = x72_opcodes; |
| 626 | reg_is_opcode = true; |
| 627 | has_modrm = true; |
| 628 | store = true; |
| 629 | immediate_bytes = 1; |
| 630 | break; |
| 631 | case 0x73: |
| 632 | if (prefix[2] == 0x66) { |
| 633 | dst_reg_file = SSE; |
| 634 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 635 | } else { |
| 636 | dst_reg_file = MMX; |
| 637 | } |
| 638 | static const char* x73_opcodes[] = {"unknown-73", "unknown-73", "psrlq", "unknown-73", "unknown-73", "unknown-73", "psllq", "unknown-73"}; |
| 639 | modrm_opcodes = x73_opcodes; |
| 640 | reg_is_opcode = true; |
| 641 | has_modrm = true; |
| 642 | store = true; |
| 643 | immediate_bytes = 1; |
| 644 | break; |
Olivier Come | fb0fecf | 2014-06-20 11:46:16 +0200 | [diff] [blame] | 645 | case 0x7C: |
| 646 | if (prefix[0] == 0xF2) { |
| 647 | opcode << "haddps"; |
| 648 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 649 | } else if (prefix[2] == 0x66) { |
| 650 | opcode << "haddpd"; |
| 651 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 652 | } else { |
| 653 | opcode << StringPrintf("unknown opcode '0F %02X'", *instr); |
| 654 | break; |
| 655 | } |
| 656 | src_reg_file = dst_reg_file = SSE; |
| 657 | has_modrm = true; |
| 658 | load = true; |
| 659 | break; |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 660 | case 0x7E: |
| 661 | if (prefix[2] == 0x66) { |
| 662 | src_reg_file = SSE; |
| 663 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 664 | } else { |
| 665 | src_reg_file = MMX; |
| 666 | } |
| 667 | opcode << "movd"; |
| 668 | has_modrm = true; |
| 669 | store = true; |
| 670 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 671 | case 0x80: case 0x81: case 0x82: case 0x83: case 0x84: case 0x85: case 0x86: case 0x87: |
| 672 | case 0x88: case 0x89: case 0x8A: case 0x8B: case 0x8C: case 0x8D: case 0x8E: case 0x8F: |
| 673 | opcode << "j" << condition_codes[*instr & 0xF]; |
| 674 | branch_bytes = 4; |
| 675 | break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 676 | case 0x90: case 0x91: case 0x92: case 0x93: case 0x94: case 0x95: case 0x96: case 0x97: |
| 677 | case 0x98: case 0x99: case 0x9A: case 0x9B: case 0x9C: case 0x9D: case 0x9E: case 0x9F: |
| 678 | opcode << "set" << condition_codes[*instr & 0xF]; |
| 679 | modrm_opcodes = NULL; |
| 680 | reg_is_opcode = true; |
| 681 | has_modrm = true; |
| 682 | store = true; |
| 683 | break; |
Mark Mendell | 4708dcd | 2014-01-22 09:05:18 -0800 | [diff] [blame] | 684 | case 0xA4: |
| 685 | opcode << "shld"; |
| 686 | has_modrm = true; |
| 687 | load = true; |
| 688 | immediate_bytes = 1; |
| 689 | break; |
| 690 | case 0xAC: |
| 691 | opcode << "shrd"; |
| 692 | has_modrm = true; |
| 693 | load = true; |
| 694 | immediate_bytes = 1; |
| 695 | break; |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 696 | case 0xAE: |
| 697 | if (prefix[0] == 0xF3) { |
Ian Rogers | 5e588b3 | 2013-02-21 15:05:09 -0800 | [diff] [blame] | 698 | prefix[0] = 0; // clear prefix now it's served its purpose as part of the opcode |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 699 | static const char* xAE_opcodes[] = {"rdfsbase", "rdgsbase", "wrfsbase", "wrgsbase", "unknown-AE", "unknown-AE", "unknown-AE", "unknown-AE"}; |
| 700 | modrm_opcodes = xAE_opcodes; |
| 701 | reg_is_opcode = true; |
| 702 | has_modrm = true; |
| 703 | uint8_t reg_or_opcode = (instr[1] >> 3) & 7; |
| 704 | switch (reg_or_opcode) { |
| 705 | case 0: |
| 706 | prefix[1] = kFs; |
| 707 | load = true; |
| 708 | break; |
| 709 | case 1: |
| 710 | prefix[1] = kGs; |
| 711 | load = true; |
| 712 | break; |
| 713 | case 2: |
| 714 | prefix[1] = kFs; |
| 715 | store = true; |
| 716 | break; |
| 717 | case 3: |
| 718 | prefix[1] = kGs; |
| 719 | store = true; |
| 720 | break; |
| 721 | default: |
| 722 | load = true; |
| 723 | break; |
| 724 | } |
| 725 | } else { |
| 726 | static const char* xAE_opcodes[] = {"unknown-AE", "unknown-AE", "unknown-AE", "unknown-AE", "unknown-AE", "lfence", "mfence", "sfence"}; |
| 727 | modrm_opcodes = xAE_opcodes; |
| 728 | reg_is_opcode = true; |
| 729 | has_modrm = true; |
| 730 | load = true; |
| 731 | no_ops = true; |
| 732 | } |
| 733 | break; |
Mark Mendell | f723f0c | 2013-12-11 17:50:58 -0800 | [diff] [blame] | 734 | case 0xAF: opcode << "imul"; has_modrm = true; load = true; break; |
jeffhao | 8302576 | 2012-08-02 11:08:56 -0700 | [diff] [blame] | 735 | case 0xB1: opcode << "cmpxchg"; has_modrm = true; store = true; break; |
Serguei Katkov | 94f3eb0 | 2014-06-24 13:23:17 +0700 | [diff] [blame^] | 736 | case 0xB6: opcode << "movzxb"; has_modrm = true; load = true; byte_second_operand = true; break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 737 | case 0xB7: opcode << "movzxw"; has_modrm = true; load = true; break; |
Serguei Katkov | 94f3eb0 | 2014-06-24 13:23:17 +0700 | [diff] [blame^] | 738 | case 0xBE: opcode << "movsxb"; has_modrm = true; load = true; byte_second_operand = true; rex |= (rex == 0 ? 0 : 0b1000); break; |
jeffhao | 854029c | 2012-07-23 17:31:30 -0700 | [diff] [blame] | 739 | case 0xBF: opcode << "movsxw"; has_modrm = true; load = true; break; |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 740 | case 0xC5: |
| 741 | if (prefix[2] == 0x66) { |
| 742 | opcode << "pextrw"; |
| 743 | prefix[2] = 0; |
| 744 | has_modrm = true; |
| 745 | store = true; |
| 746 | src_reg_file = dst_reg_file = SSE; |
| 747 | immediate_bytes = 1; |
| 748 | } else { |
| 749 | opcode << StringPrintf("unknown opcode '0F %02X'", *instr); |
| 750 | } |
| 751 | break; |
Olivier Come | fb0fecf | 2014-06-20 11:46:16 +0200 | [diff] [blame] | 752 | case 0xC6: |
| 753 | if (prefix[2] == 0x66) { |
| 754 | opcode << "shufpd"; |
| 755 | prefix[2] = 0; |
| 756 | } else { |
| 757 | opcode << "shufps"; |
| 758 | } |
| 759 | has_modrm = true; |
| 760 | store = true; |
| 761 | src_reg_file = dst_reg_file = SSE; |
| 762 | immediate_bytes = 1; |
| 763 | break; |
Vladimir Marko | 70b797d | 2013-12-03 15:25:24 +0000 | [diff] [blame] | 764 | case 0xC7: |
| 765 | static const char* x0FxC7_opcodes[] = { "unknown-0f-c7", "cmpxchg8b", "unknown-0f-c7", "unknown-0f-c7", "unknown-0f-c7", "unknown-0f-c7", "unknown-0f-c7", "unknown-0f-c7" }; |
| 766 | modrm_opcodes = x0FxC7_opcodes; |
| 767 | has_modrm = true; |
| 768 | reg_is_opcode = true; |
| 769 | store = true; |
| 770 | break; |
Vladimir Marko | a8b4caf | 2013-10-24 15:08:57 +0100 | [diff] [blame] | 771 | case 0xC8: case 0xC9: case 0xCA: case 0xCB: case 0xCC: case 0xCD: case 0xCE: case 0xCF: |
| 772 | opcode << "bswap"; |
| 773 | reg_in_opcode = true; |
| 774 | break; |
Mark Mendell | fe94578 | 2014-05-22 09:52:36 -0400 | [diff] [blame] | 775 | case 0xDB: |
| 776 | if (prefix[2] == 0x66) { |
| 777 | src_reg_file = dst_reg_file = SSE; |
| 778 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 779 | } else { |
| 780 | src_reg_file = dst_reg_file = MMX; |
| 781 | } |
| 782 | opcode << "pand"; |
| 783 | prefix[2] = 0; |
| 784 | has_modrm = true; |
| 785 | load = true; |
| 786 | break; |
| 787 | case 0xD5: |
| 788 | if (prefix[2] == 0x66) { |
| 789 | opcode << "pmullw"; |
| 790 | prefix[2] = 0; |
| 791 | has_modrm = true; |
| 792 | load = true; |
| 793 | src_reg_file = dst_reg_file = SSE; |
| 794 | } else { |
| 795 | opcode << StringPrintf("unknown opcode '0F %02X'", *instr); |
| 796 | } |
| 797 | break; |
| 798 | case 0xEB: |
| 799 | if (prefix[2] == 0x66) { |
| 800 | src_reg_file = dst_reg_file = SSE; |
| 801 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 802 | } else { |
| 803 | src_reg_file = dst_reg_file = MMX; |
| 804 | } |
| 805 | opcode << "por"; |
| 806 | prefix[2] = 0; |
| 807 | has_modrm = true; |
| 808 | load = true; |
| 809 | break; |
| 810 | case 0xEF: |
| 811 | if (prefix[2] == 0x66) { |
| 812 | src_reg_file = dst_reg_file = SSE; |
| 813 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 814 | } else { |
| 815 | src_reg_file = dst_reg_file = MMX; |
| 816 | } |
| 817 | opcode << "pxor"; |
| 818 | prefix[2] = 0; |
| 819 | has_modrm = true; |
| 820 | load = true; |
| 821 | break; |
| 822 | case 0xF8: |
| 823 | if (prefix[2] == 0x66) { |
| 824 | src_reg_file = dst_reg_file = SSE; |
| 825 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 826 | } else { |
| 827 | src_reg_file = dst_reg_file = MMX; |
| 828 | } |
| 829 | opcode << "psubb"; |
| 830 | prefix[2] = 0; |
| 831 | has_modrm = true; |
| 832 | load = true; |
| 833 | break; |
| 834 | case 0xF9: |
| 835 | if (prefix[2] == 0x66) { |
| 836 | src_reg_file = dst_reg_file = SSE; |
| 837 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 838 | } else { |
| 839 | src_reg_file = dst_reg_file = MMX; |
| 840 | } |
| 841 | opcode << "psubw"; |
| 842 | prefix[2] = 0; |
| 843 | has_modrm = true; |
| 844 | load = true; |
| 845 | break; |
| 846 | case 0xFA: |
| 847 | if (prefix[2] == 0x66) { |
| 848 | src_reg_file = dst_reg_file = SSE; |
| 849 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 850 | } else { |
| 851 | src_reg_file = dst_reg_file = MMX; |
| 852 | } |
| 853 | opcode << "psubd"; |
| 854 | prefix[2] = 0; |
| 855 | has_modrm = true; |
| 856 | load = true; |
| 857 | break; |
| 858 | case 0xFC: |
| 859 | if (prefix[2] == 0x66) { |
| 860 | src_reg_file = dst_reg_file = SSE; |
| 861 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 862 | } else { |
| 863 | src_reg_file = dst_reg_file = MMX; |
| 864 | } |
| 865 | opcode << "paddb"; |
| 866 | prefix[2] = 0; |
| 867 | has_modrm = true; |
| 868 | load = true; |
| 869 | break; |
| 870 | case 0xFD: |
| 871 | if (prefix[2] == 0x66) { |
| 872 | src_reg_file = dst_reg_file = SSE; |
| 873 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 874 | } else { |
| 875 | src_reg_file = dst_reg_file = MMX; |
| 876 | } |
| 877 | opcode << "paddw"; |
| 878 | prefix[2] = 0; |
| 879 | has_modrm = true; |
| 880 | load = true; |
| 881 | break; |
| 882 | case 0xFE: |
| 883 | if (prefix[2] == 0x66) { |
| 884 | src_reg_file = dst_reg_file = SSE; |
| 885 | prefix[2] = 0; // clear prefix now it's served its purpose as part of the opcode |
| 886 | } else { |
| 887 | src_reg_file = dst_reg_file = MMX; |
| 888 | } |
| 889 | opcode << "paddd"; |
| 890 | prefix[2] = 0; |
| 891 | has_modrm = true; |
| 892 | load = true; |
| 893 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 894 | default: |
| 895 | opcode << StringPrintf("unknown opcode '0F %02X'", *instr); |
| 896 | break; |
| 897 | } |
| 898 | break; |
| 899 | case 0x80: case 0x81: case 0x82: case 0x83: |
| 900 | static const char* x80_opcodes[] = {"add", "or", "adc", "sbb", "and", "sub", "xor", "cmp"}; |
| 901 | modrm_opcodes = x80_opcodes; |
| 902 | has_modrm = true; |
| 903 | reg_is_opcode = true; |
| 904 | store = true; |
| 905 | byte_operand = (*instr & 1) == 0; |
| 906 | immediate_bytes = *instr == 0x81 ? 4 : 1; |
| 907 | break; |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 908 | case 0x84: case 0x85: |
| 909 | opcode << "test"; |
| 910 | has_modrm = true; |
| 911 | load = true; |
| 912 | byte_operand = (*instr & 1) == 0; |
| 913 | break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 914 | case 0x8D: |
| 915 | opcode << "lea"; |
| 916 | has_modrm = true; |
| 917 | load = true; |
| 918 | break; |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 919 | case 0x8F: |
| 920 | opcode << "pop"; |
| 921 | has_modrm = true; |
| 922 | reg_is_opcode = true; |
| 923 | store = true; |
| 924 | break; |
Mark Mendell | 2bf31e6 | 2014-01-23 12:13:40 -0800 | [diff] [blame] | 925 | case 0x99: |
| 926 | opcode << "cdq"; |
| 927 | break; |
Vladimir Kostyukov | d48b8a2 | 2014-06-24 16:40:19 +0700 | [diff] [blame] | 928 | case 0x9B: |
| 929 | if (instr[1] == 0xDF && instr[2] == 0xE0) { |
| 930 | opcode << "fstsw\tax"; |
| 931 | instr += 2; |
| 932 | } else { |
| 933 | opcode << StringPrintf("unknown opcode '%02X'", *instr); |
| 934 | } |
| 935 | break; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 936 | case 0xAF: |
| 937 | opcode << (prefix[2] == 0x66 ? "scasw" : "scasl"); |
| 938 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 939 | case 0xB0: case 0xB1: case 0xB2: case 0xB3: case 0xB4: case 0xB5: case 0xB6: case 0xB7: |
| 940 | opcode << "mov"; |
| 941 | immediate_bytes = 1; |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 942 | byte_operand = true; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 943 | reg_in_opcode = true; |
| 944 | break; |
| 945 | case 0xB8: case 0xB9: case 0xBA: case 0xBB: case 0xBC: case 0xBD: case 0xBE: case 0xBF: |
Yixin Shou | 5192cbb | 2014-07-01 13:48:17 -0400 | [diff] [blame] | 946 | if (rex == 0x48) { |
| 947 | opcode << "movabsq"; |
| 948 | immediate_bytes = 8; |
| 949 | reg_in_opcode = true; |
| 950 | break; |
| 951 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 952 | opcode << "mov"; |
| 953 | immediate_bytes = 4; |
| 954 | reg_in_opcode = true; |
| 955 | break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 956 | case 0xC0: case 0xC1: |
jeffhao | e296248 | 2012-06-28 11:29:57 -0700 | [diff] [blame] | 957 | case 0xD0: case 0xD1: case 0xD2: case 0xD3: |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 958 | static const char* shift_opcodes[] = |
| 959 | {"rol", "ror", "rcl", "rcr", "shl", "shr", "unknown-shift", "sar"}; |
| 960 | modrm_opcodes = shift_opcodes; |
| 961 | has_modrm = true; |
| 962 | reg_is_opcode = true; |
| 963 | store = true; |
Elliott Hughes | 16b5c29 | 2012-04-16 20:37:16 -0700 | [diff] [blame] | 964 | immediate_bytes = ((*instr & 0xf0) == 0xc0) ? 1 : 0; |
jeffhao | e296248 | 2012-06-28 11:29:57 -0700 | [diff] [blame] | 965 | cx = (*instr == 0xD2) || (*instr == 0xD3); |
| 966 | byte_operand = (*instr == 0xC0); |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 967 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 968 | case 0xC3: opcode << "ret"; break; |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 969 | case 0xC6: |
| 970 | static const char* c6_opcodes[] = {"mov", "unknown-c6", "unknown-c6", "unknown-c6", "unknown-c6", "unknown-c6", "unknown-c6", "unknown-c6"}; |
| 971 | modrm_opcodes = c6_opcodes; |
| 972 | store = true; |
| 973 | immediate_bytes = 1; |
| 974 | has_modrm = true; |
| 975 | reg_is_opcode = true; |
| 976 | byte_operand = true; |
| 977 | break; |
Elliott Hughes | 0589ca9 | 2012-04-09 18:26:20 -0700 | [diff] [blame] | 978 | case 0xC7: |
| 979 | static const char* c7_opcodes[] = {"mov", "unknown-c7", "unknown-c7", "unknown-c7", "unknown-c7", "unknown-c7", "unknown-c7", "unknown-c7"}; |
| 980 | modrm_opcodes = c7_opcodes; |
| 981 | store = true; |
| 982 | immediate_bytes = 4; |
| 983 | has_modrm = true; |
| 984 | reg_is_opcode = true; |
| 985 | break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 986 | case 0xCC: opcode << "int 3"; break; |
Mark Mendell | d19b55a | 2013-12-12 09:55:34 -0800 | [diff] [blame] | 987 | case 0xD9: |
Vladimir Kostyukov | d48b8a2 | 2014-06-24 16:40:19 +0700 | [diff] [blame] | 988 | if (instr[1] == 0xF8) { |
| 989 | opcode << "fprem"; |
| 990 | instr++; |
| 991 | } else { |
| 992 | static const char* d9_opcodes[] = {"flds", "unknown-d9", "fsts", "fstps", "fldenv", "fldcw", |
| 993 | "fnstenv", "fnstcw"}; |
| 994 | modrm_opcodes = d9_opcodes; |
| 995 | store = true; |
| 996 | has_modrm = true; |
| 997 | reg_is_opcode = true; |
| 998 | } |
| 999 | break; |
| 1000 | case 0xDA: |
| 1001 | if (instr[1] == 0xE9) { |
| 1002 | opcode << "fucompp"; |
| 1003 | instr++; |
| 1004 | } else { |
| 1005 | opcode << StringPrintf("unknown opcode '%02X'", *instr); |
| 1006 | } |
Mark Mendell | d19b55a | 2013-12-12 09:55:34 -0800 | [diff] [blame] | 1007 | break; |
Razvan A Lupusoru | 614c2b4 | 2014-01-28 17:05:21 -0800 | [diff] [blame] | 1008 | case 0xDB: |
| 1009 | static const char* db_opcodes[] = {"fildl", "unknown-db", "unknown-db", "unknown-db", "unknown-db", "unknown-db", "unknown-db", "unknown-db"}; |
| 1010 | modrm_opcodes = db_opcodes; |
| 1011 | load = true; |
| 1012 | has_modrm = true; |
| 1013 | reg_is_opcode = true; |
| 1014 | break; |
Mark Mendell | d19b55a | 2013-12-12 09:55:34 -0800 | [diff] [blame] | 1015 | case 0xDD: |
| 1016 | static const char* dd_opcodes[] = {"fldl", "fisttp", "fstl", "fstpl", "frstor", "unknown-dd", "fnsave", "fnstsw"}; |
| 1017 | modrm_opcodes = dd_opcodes; |
| 1018 | store = true; |
| 1019 | has_modrm = true; |
| 1020 | reg_is_opcode = true; |
| 1021 | break; |
Razvan A Lupusoru | 614c2b4 | 2014-01-28 17:05:21 -0800 | [diff] [blame] | 1022 | case 0xDF: |
| 1023 | static const char* df_opcodes[] = {"fild", "unknown-df", "unknown-df", "unknown-df", "unknown-df", "fildll", "unknown-df", "unknown-df"}; |
| 1024 | modrm_opcodes = df_opcodes; |
| 1025 | load = true; |
| 1026 | has_modrm = true; |
| 1027 | reg_is_opcode = true; |
| 1028 | break; |
Mark Mendell | 4028a6c | 2014-02-19 20:06:20 -0800 | [diff] [blame] | 1029 | case 0xE3: opcode << "jecxz"; branch_bytes = 1; break; |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 1030 | case 0xE8: opcode << "call"; branch_bytes = 4; break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1031 | case 0xE9: opcode << "jmp"; branch_bytes = 4; break; |
| 1032 | case 0xEB: opcode << "jmp"; branch_bytes = 1; break; |
jeffhao | 77ae36b | 2012-08-07 14:18:16 -0700 | [diff] [blame] | 1033 | case 0xF5: opcode << "cmc"; break; |
jeffhao | 174651d | 2012-04-19 15:27:22 -0700 | [diff] [blame] | 1034 | case 0xF6: case 0xF7: |
| 1035 | static const char* f7_opcodes[] = {"test", "unknown-f7", "not", "neg", "mul edx:eax, eax *", "imul edx:eax, eax *", "div edx:eax, edx:eax /", "idiv edx:eax, edx:eax /"}; |
| 1036 | modrm_opcodes = f7_opcodes; |
| 1037 | has_modrm = true; |
| 1038 | reg_is_opcode = true; |
| 1039 | store = true; |
| 1040 | immediate_bytes = ((instr[1] & 0x38) == 0) ? 1 : 0; |
| 1041 | break; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1042 | case 0xFF: |
Vladimir Kostyukov | e443a80 | 2014-06-30 15:44:12 +0700 | [diff] [blame] | 1043 | { |
| 1044 | static const char* ff_opcodes[] = {"inc", "dec", "call", "call", "jmp", "jmp", "push", "unknown-ff"}; |
| 1045 | modrm_opcodes = ff_opcodes; |
| 1046 | has_modrm = true; |
| 1047 | reg_is_opcode = true; |
| 1048 | load = true; |
| 1049 | const uint8_t opcode_digit = (instr[1] >> 3) & 7; |
| 1050 | // 'call', 'jmp' and 'push' are target specific instructions |
| 1051 | if (opcode_digit == 2 || opcode_digit == 4 || opcode_digit == 6) { |
| 1052 | target_specific = true; |
| 1053 | } |
| 1054 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1055 | break; |
| 1056 | default: |
| 1057 | opcode << StringPrintf("unknown opcode '%02X'", *instr); |
| 1058 | break; |
| 1059 | } |
| 1060 | std::ostringstream args; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 1061 | // We force the REX prefix to be available for 64-bit target |
| 1062 | // in order to dump addr (base/index) registers correctly. |
| 1063 | uint8_t rex64 = supports_rex_ ? (rex | 0x40) : rex; |
Vladimir Kostyukov | e443a80 | 2014-06-30 15:44:12 +0700 | [diff] [blame] | 1064 | // REX.W should be forced for 64-target and target-specific instructions (i.e., push or pop). |
| 1065 | uint8_t rex_w = (supports_rex_ && target_specific) ? (rex | 0x48) : rex; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1066 | if (reg_in_opcode) { |
| 1067 | DCHECK(!has_modrm); |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 1068 | DumpOpcodeReg(args, rex_w, *instr & 0x7); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1069 | } |
| 1070 | instr++; |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 1071 | uint32_t address_bits = 0; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1072 | if (has_modrm) { |
| 1073 | uint8_t modrm = *instr; |
| 1074 | instr++; |
| 1075 | uint8_t mod = modrm >> 6; |
| 1076 | uint8_t reg_or_opcode = (modrm >> 3) & 7; |
| 1077 | uint8_t rm = modrm & 7; |
| 1078 | std::ostringstream address; |
Vladimir Kostyukov | e8861b3 | 2014-04-18 17:06:15 +0700 | [diff] [blame] | 1079 | if (mod == 0 && rm == 5) { |
| 1080 | if (!supports_rex_) { // Absolute address. |
| 1081 | address_bits = *reinterpret_cast<const uint32_t*>(instr); |
| 1082 | address << StringPrintf("[0x%x]", address_bits); |
| 1083 | } else { // 64-bit RIP relative addressing. |
| 1084 | address << StringPrintf("[RIP + 0x%x]", *reinterpret_cast<const uint32_t*>(instr)); |
| 1085 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1086 | instr += 4; |
| 1087 | } else if (rm == 4 && mod != 3) { // SIB |
| 1088 | uint8_t sib = *instr; |
| 1089 | instr++; |
Vladimir Kostyukov | e8861b3 | 2014-04-18 17:06:15 +0700 | [diff] [blame] | 1090 | uint8_t scale = (sib >> 6) & 3; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1091 | uint8_t index = (sib >> 3) & 7; |
| 1092 | uint8_t base = sib & 7; |
| 1093 | address << "["; |
| 1094 | if (base != 5 || mod != 0) { |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 1095 | DumpBaseReg(address, rex64, base); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1096 | if (index != 4) { |
| 1097 | address << " + "; |
| 1098 | } |
| 1099 | } |
| 1100 | if (index != 4) { |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 1101 | DumpIndexReg(address, rex64, index); |
Vladimir Kostyukov | e8861b3 | 2014-04-18 17:06:15 +0700 | [diff] [blame] | 1102 | if (scale != 0) { |
| 1103 | address << StringPrintf(" * %d", 1 << scale); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1104 | } |
| 1105 | } |
Vladimir Kostyukov | e8861b3 | 2014-04-18 17:06:15 +0700 | [diff] [blame] | 1106 | if (mod == 0) { |
| 1107 | if (base == 5) { |
| 1108 | if (index != 4) { |
| 1109 | address << StringPrintf(" + %d", *reinterpret_cast<const int32_t*>(instr)); |
| 1110 | } else { |
| 1111 | // 64-bit low 32-bit absolute address, redundant absolute address encoding on 32-bit. |
| 1112 | address_bits = *reinterpret_cast<const uint32_t*>(instr); |
| 1113 | address << StringPrintf("%d", address_bits); |
| 1114 | } |
| 1115 | instr += 4; |
| 1116 | } |
| 1117 | } else if (mod == 1) { |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1118 | address << StringPrintf(" + %d", *reinterpret_cast<const int8_t*>(instr)); |
| 1119 | instr++; |
| 1120 | } else if (mod == 2) { |
| 1121 | address << StringPrintf(" + %d", *reinterpret_cast<const int32_t*>(instr)); |
| 1122 | instr += 4; |
| 1123 | } |
| 1124 | address << "]"; |
| 1125 | } else { |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1126 | if (mod == 3) { |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 1127 | if (!no_ops) { |
Serguei Katkov | 94f3eb0 | 2014-06-24 13:23:17 +0700 | [diff] [blame^] | 1128 | DumpRmReg(address, rex_w, rm, byte_operand || byte_second_operand, |
| 1129 | prefix[2], load ? src_reg_file : dst_reg_file); |
jeffhao | 703f2cd | 2012-07-13 17:25:52 -0700 | [diff] [blame] | 1130 | } |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1131 | } else { |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1132 | address << "["; |
Vladimir Kostyukov | 122113a | 2014-05-30 17:56:23 +0700 | [diff] [blame] | 1133 | DumpBaseReg(address, rex64, rm); |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1134 | if (mod == 1) { |
| 1135 | address << StringPrintf(" + %d", *reinterpret_cast<const int8_t*>(instr)); |
| 1136 | instr++; |
| 1137 | } else if (mod == 2) { |
| 1138 | address << StringPrintf(" + %d", *reinterpret_cast<const int32_t*>(instr)); |
| 1139 | instr += 4; |
| 1140 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1141 | address << "]"; |
| 1142 | } |
| 1143 | } |
| 1144 | |
Ian Rogers | 7caad77 | 2012-03-30 01:07:54 -0700 | [diff] [blame] | 1145 | if (reg_is_opcode && modrm_opcodes != NULL) { |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1146 | opcode << modrm_opcodes[reg_or_opcode]; |
| 1147 | } |
Mark Mendell | a33720c | 2014-06-18 21:02:29 -0400 | [diff] [blame] | 1148 | |
| 1149 | // Add opcode suffixes to indicate size. |
| 1150 | if (byte_operand) { |
| 1151 | opcode << 'b'; |
| 1152 | } else if ((rex & REX_W) != 0) { |
| 1153 | opcode << 'q'; |
| 1154 | } else if (prefix[2] == 0x66) { |
| 1155 | opcode << 'w'; |
| 1156 | } |
| 1157 | |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1158 | if (load) { |
| 1159 | if (!reg_is_opcode) { |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1160 | DumpReg(args, rex, reg_or_opcode, byte_operand, prefix[2], dst_reg_file); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1161 | args << ", "; |
| 1162 | } |
| 1163 | DumpSegmentOverride(args, prefix[1]); |
| 1164 | args << address.str(); |
| 1165 | } else { |
| 1166 | DCHECK(store); |
| 1167 | DumpSegmentOverride(args, prefix[1]); |
| 1168 | args << address.str(); |
| 1169 | if (!reg_is_opcode) { |
| 1170 | args << ", "; |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1171 | DumpReg(args, rex, reg_or_opcode, byte_operand, prefix[2], src_reg_file); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1172 | } |
| 1173 | } |
| 1174 | } |
| 1175 | if (ax) { |
jeffhao | fdffdf8 | 2012-07-11 16:08:43 -0700 | [diff] [blame] | 1176 | // If this opcode implicitly uses ax, ax is always the first arg. |
Ian Rogers | bf98980 | 2012-04-16 16:07:49 -0700 | [diff] [blame] | 1177 | DumpReg(args, rex, 0 /* EAX */, byte_operand, prefix[2], GPR); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1178 | } |
jeffhao | e296248 | 2012-06-28 11:29:57 -0700 | [diff] [blame] | 1179 | if (cx) { |
| 1180 | args << ", "; |
| 1181 | DumpReg(args, rex, 1 /* ECX */, true, prefix[2], GPR); |
| 1182 | } |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1183 | if (immediate_bytes > 0) { |
jeffhao | e296248 | 2012-06-28 11:29:57 -0700 | [diff] [blame] | 1184 | if (has_modrm || reg_in_opcode || ax || cx) { |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1185 | args << ", "; |
| 1186 | } |
| 1187 | if (immediate_bytes == 1) { |
| 1188 | args << StringPrintf("%d", *reinterpret_cast<const int8_t*>(instr)); |
| 1189 | instr++; |
Yixin Shou | 5192cbb | 2014-07-01 13:48:17 -0400 | [diff] [blame] | 1190 | } else if (immediate_bytes == 4) { |
Mark Mendell | 67d18be | 2014-05-30 15:05:09 -0400 | [diff] [blame] | 1191 | if (prefix[2] == 0x66) { // Operand size override from 32-bit to 16-bit. |
| 1192 | args << StringPrintf("%d", *reinterpret_cast<const int16_t*>(instr)); |
| 1193 | instr += 2; |
| 1194 | } else { |
| 1195 | args << StringPrintf("%d", *reinterpret_cast<const int32_t*>(instr)); |
| 1196 | instr += 4; |
| 1197 | } |
Yixin Shou | 5192cbb | 2014-07-01 13:48:17 -0400 | [diff] [blame] | 1198 | } else { |
| 1199 | CHECK_EQ(immediate_bytes, 8u); |
| 1200 | args << StringPrintf("%" PRId64, *reinterpret_cast<const int64_t*>(instr)); |
| 1201 | instr += 8; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1202 | } |
| 1203 | } else if (branch_bytes > 0) { |
| 1204 | DCHECK(!has_modrm); |
| 1205 | int32_t displacement; |
| 1206 | if (branch_bytes == 1) { |
| 1207 | displacement = *reinterpret_cast<const int8_t*>(instr); |
| 1208 | instr++; |
| 1209 | } else { |
| 1210 | CHECK_EQ(branch_bytes, 4u); |
| 1211 | displacement = *reinterpret_cast<const int32_t*>(instr); |
| 1212 | instr += 4; |
| 1213 | } |
Elliott Hughes | 14178a9 | 2012-04-16 17:24:51 -0700 | [diff] [blame] | 1214 | args << StringPrintf("%+d (%p)", displacement, instr + displacement); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1215 | } |
Ian Rogers | dd7624d | 2014-03-14 17:43:00 -0700 | [diff] [blame] | 1216 | if (prefix[1] == kFs && !supports_rex_) { |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 1217 | args << " ; "; |
Ian Rogers | dd7624d | 2014-03-14 17:43:00 -0700 | [diff] [blame] | 1218 | Thread::DumpThreadOffset<4>(args, address_bits); |
| 1219 | } |
| 1220 | if (prefix[1] == kGs && supports_rex_) { |
| 1221 | args << " ; "; |
| 1222 | Thread::DumpThreadOffset<8>(args, address_bits); |
Elliott Hughes | 92301d9 | 2012-04-10 15:57:52 -0700 | [diff] [blame] | 1223 | } |
Elliott Hughes | 28fa76d | 2012-04-09 17:31:46 -0700 | [diff] [blame] | 1224 | std::stringstream hex; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1225 | for (size_t i = 0; begin_instr + i < instr; ++i) { |
Elliott Hughes | 28fa76d | 2012-04-09 17:31:46 -0700 | [diff] [blame] | 1226 | hex << StringPrintf("%02X", begin_instr[i]); |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1227 | } |
Ian Rogers | 5e588b3 | 2013-02-21 15:05:09 -0800 | [diff] [blame] | 1228 | std::stringstream prefixed_opcode; |
| 1229 | switch (prefix[0]) { |
| 1230 | case 0xF0: prefixed_opcode << "lock "; break; |
| 1231 | case 0xF2: prefixed_opcode << "repne "; break; |
| 1232 | case 0xF3: prefixed_opcode << "repe "; break; |
| 1233 | case 0: break; |
| 1234 | default: LOG(FATAL) << "Unreachable"; |
| 1235 | } |
| 1236 | prefixed_opcode << opcode.str(); |
| 1237 | os << StringPrintf("%p: %22s \t%-7s ", begin_instr, hex.str().c_str(), |
| 1238 | prefixed_opcode.str().c_str()) |
| 1239 | << args.str() << '\n'; |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1240 | return instr - begin_instr; |
Brian Carlstrom | 7934ac2 | 2013-07-26 10:54:15 -0700 | [diff] [blame] | 1241 | } // NOLINT(readability/fn_size) |
Ian Rogers | 706a10e | 2012-03-23 17:00:55 -0700 | [diff] [blame] | 1242 | |
| 1243 | } // namespace x86 |
| 1244 | } // namespace art |