Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 <stdint.h> |
| 18 | |
| 19 | #include <deque> |
| 20 | #include <string> |
| 21 | #include <vector> |
| 22 | |
| 23 | #include <android-base/stringprintf.h> |
| 24 | |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 25 | #include <unwindstack/DwarfError.h> |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 26 | #include <unwindstack/DwarfMemory.h> |
| 27 | #include <unwindstack/Log.h> |
| 28 | #include <unwindstack/Memory.h> |
| 29 | #include <unwindstack/Regs.h> |
| 30 | |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 31 | #include "DwarfOp.h" |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 32 | |
| 33 | namespace unwindstack { |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 34 | |
| 35 | template <typename AddressType> |
| 36 | constexpr typename DwarfOp<AddressType>::OpCallback DwarfOp<AddressType>::kCallbackTable[256]; |
| 37 | |
| 38 | template <typename AddressType> |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 39 | bool DwarfOp<AddressType>::Eval(uint64_t start, uint64_t end) { |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 40 | is_register_ = false; |
| 41 | stack_.clear(); |
| 42 | memory_->set_cur_offset(start); |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 43 | dex_pc_set_ = false; |
| 44 | |
| 45 | // Unroll the first Decode calls to be able to check for a special |
| 46 | // sequence of ops and values that indicate this is the dex pc. |
| 47 | // The pattern is: |
| 48 | // OP_const4u (0x0c) 'D' 'E' 'X' '1' |
| 49 | // OP_drop (0x13) |
| 50 | if (memory_->cur_offset() < end) { |
| 51 | if (!Decode()) { |
| 52 | return false; |
| 53 | } |
| 54 | } else { |
| 55 | return true; |
| 56 | } |
| 57 | bool check_for_drop; |
| 58 | if (cur_op_ == 0x0c && operands_.back() == 0x31584544) { |
| 59 | check_for_drop = true; |
| 60 | } else { |
| 61 | check_for_drop = false; |
| 62 | } |
| 63 | if (memory_->cur_offset() < end) { |
| 64 | if (!Decode()) { |
| 65 | return false; |
| 66 | } |
| 67 | } else { |
| 68 | return true; |
| 69 | } |
| 70 | |
| 71 | if (check_for_drop && cur_op_ == 0x13) { |
| 72 | dex_pc_set_ = true; |
| 73 | } |
| 74 | |
| 75 | uint32_t iterations = 2; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 76 | while (memory_->cur_offset() < end) { |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 77 | if (!Decode()) { |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 78 | return false; |
| 79 | } |
| 80 | // To protect against a branch that creates an infinite loop, |
| 81 | // terminate if the number of iterations gets too high. |
| 82 | if (iterations++ == 1000) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 83 | last_error_.code = DWARF_ERROR_TOO_MANY_ITERATIONS; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 84 | return false; |
| 85 | } |
| 86 | } |
| 87 | return true; |
| 88 | } |
| 89 | |
| 90 | template <typename AddressType> |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 91 | bool DwarfOp<AddressType>::Decode() { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 92 | last_error_.code = DWARF_ERROR_NONE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 93 | if (!memory_->ReadBytes(&cur_op_, 1)) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 94 | last_error_.code = DWARF_ERROR_MEMORY_INVALID; |
| 95 | last_error_.address = memory_->cur_offset(); |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 96 | return false; |
| 97 | } |
| 98 | |
| 99 | const auto* op = &kCallbackTable[cur_op_]; |
| 100 | const auto handle_func = op->handle_func; |
| 101 | if (handle_func == nullptr) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 102 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 103 | return false; |
| 104 | } |
| 105 | |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 106 | // Make sure that the required number of stack elements is available. |
| 107 | if (stack_.size() < op->num_required_stack_values) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 108 | last_error_.code = DWARF_ERROR_STACK_INDEX_NOT_VALID; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 109 | return false; |
| 110 | } |
| 111 | |
| 112 | operands_.clear(); |
| 113 | for (size_t i = 0; i < op->num_operands; i++) { |
| 114 | uint64_t value; |
| 115 | if (!memory_->ReadEncodedValue<AddressType>(op->operands[i], &value)) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 116 | last_error_.code = DWARF_ERROR_MEMORY_INVALID; |
| 117 | last_error_.address = memory_->cur_offset(); |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 118 | return false; |
| 119 | } |
| 120 | operands_.push_back(value); |
| 121 | } |
| 122 | return (this->*handle_func)(); |
| 123 | } |
| 124 | |
| 125 | template <typename AddressType> |
| 126 | void DwarfOp<AddressType>::GetLogInfo(uint64_t start, uint64_t end, |
| 127 | std::vector<std::string>* lines) { |
| 128 | memory_->set_cur_offset(start); |
| 129 | while (memory_->cur_offset() < end) { |
| 130 | uint8_t cur_op; |
| 131 | if (!memory_->ReadBytes(&cur_op, 1)) { |
| 132 | return; |
| 133 | } |
| 134 | |
| 135 | std::string raw_string(android::base::StringPrintf("Raw Data: 0x%02x", cur_op)); |
| 136 | std::string log_string; |
| 137 | const auto* op = &kCallbackTable[cur_op]; |
| 138 | if (op->handle_func == nullptr) { |
| 139 | log_string = "Illegal"; |
| 140 | } else { |
| 141 | log_string = op->name; |
| 142 | uint64_t start_offset = memory_->cur_offset(); |
| 143 | for (size_t i = 0; i < op->num_operands; i++) { |
| 144 | uint64_t value; |
| 145 | if (!memory_->ReadEncodedValue<AddressType>(op->operands[i], &value)) { |
| 146 | return; |
| 147 | } |
| 148 | log_string += ' ' + std::to_string(value); |
| 149 | } |
| 150 | uint64_t end_offset = memory_->cur_offset(); |
| 151 | |
| 152 | memory_->set_cur_offset(start_offset); |
| 153 | for (size_t i = start_offset; i < end_offset; i++) { |
| 154 | uint8_t byte; |
| 155 | if (!memory_->ReadBytes(&byte, 1)) { |
| 156 | return; |
| 157 | } |
| 158 | raw_string += android::base::StringPrintf(" 0x%02x", byte); |
| 159 | } |
| 160 | memory_->set_cur_offset(end_offset); |
| 161 | } |
| 162 | lines->push_back(std::move(log_string)); |
| 163 | lines->push_back(std::move(raw_string)); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | template <typename AddressType> |
| 168 | bool DwarfOp<AddressType>::op_deref() { |
| 169 | // Read the address and dereference it. |
| 170 | AddressType addr = StackPop(); |
| 171 | AddressType value; |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 172 | if (!regular_memory()->ReadFully(addr, &value, sizeof(value))) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 173 | last_error_.code = DWARF_ERROR_MEMORY_INVALID; |
| 174 | last_error_.address = addr; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 175 | return false; |
| 176 | } |
| 177 | stack_.push_front(value); |
| 178 | return true; |
| 179 | } |
| 180 | |
| 181 | template <typename AddressType> |
| 182 | bool DwarfOp<AddressType>::op_deref_size() { |
| 183 | AddressType bytes_to_read = OperandAt(0); |
| 184 | if (bytes_to_read > sizeof(AddressType) || bytes_to_read == 0) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 185 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 186 | return false; |
| 187 | } |
| 188 | // Read the address and dereference it. |
| 189 | AddressType addr = StackPop(); |
| 190 | AddressType value = 0; |
Josh Gao | ef35aa5 | 2017-10-18 11:44:51 -0700 | [diff] [blame] | 191 | if (!regular_memory()->ReadFully(addr, &value, bytes_to_read)) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 192 | last_error_.code = DWARF_ERROR_MEMORY_INVALID; |
| 193 | last_error_.address = addr; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 194 | return false; |
| 195 | } |
| 196 | stack_.push_front(value); |
| 197 | return true; |
| 198 | } |
| 199 | |
| 200 | template <typename AddressType> |
| 201 | bool DwarfOp<AddressType>::op_push() { |
| 202 | // Push all of the operands. |
| 203 | for (auto operand : operands_) { |
| 204 | stack_.push_front(operand); |
| 205 | } |
| 206 | return true; |
| 207 | } |
| 208 | |
| 209 | template <typename AddressType> |
| 210 | bool DwarfOp<AddressType>::op_dup() { |
| 211 | stack_.push_front(StackAt(0)); |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | template <typename AddressType> |
| 216 | bool DwarfOp<AddressType>::op_drop() { |
| 217 | StackPop(); |
| 218 | return true; |
| 219 | } |
| 220 | |
| 221 | template <typename AddressType> |
| 222 | bool DwarfOp<AddressType>::op_over() { |
| 223 | stack_.push_front(StackAt(1)); |
| 224 | return true; |
| 225 | } |
| 226 | |
| 227 | template <typename AddressType> |
| 228 | bool DwarfOp<AddressType>::op_pick() { |
| 229 | AddressType index = OperandAt(0); |
| 230 | if (index > StackSize()) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 231 | last_error_.code = DWARF_ERROR_STACK_INDEX_NOT_VALID; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 232 | return false; |
| 233 | } |
| 234 | stack_.push_front(StackAt(index)); |
| 235 | return true; |
| 236 | } |
| 237 | |
| 238 | template <typename AddressType> |
| 239 | bool DwarfOp<AddressType>::op_swap() { |
| 240 | AddressType old_value = stack_[0]; |
| 241 | stack_[0] = stack_[1]; |
| 242 | stack_[1] = old_value; |
| 243 | return true; |
| 244 | } |
| 245 | |
| 246 | template <typename AddressType> |
| 247 | bool DwarfOp<AddressType>::op_rot() { |
| 248 | AddressType top = stack_[0]; |
| 249 | stack_[0] = stack_[1]; |
| 250 | stack_[1] = stack_[2]; |
| 251 | stack_[2] = top; |
| 252 | return true; |
| 253 | } |
| 254 | |
| 255 | template <typename AddressType> |
| 256 | bool DwarfOp<AddressType>::op_abs() { |
| 257 | SignedType signed_value = static_cast<SignedType>(stack_[0]); |
| 258 | if (signed_value < 0) { |
| 259 | signed_value = -signed_value; |
| 260 | } |
| 261 | stack_[0] = static_cast<AddressType>(signed_value); |
| 262 | return true; |
| 263 | } |
| 264 | |
| 265 | template <typename AddressType> |
| 266 | bool DwarfOp<AddressType>::op_and() { |
| 267 | AddressType top = StackPop(); |
| 268 | stack_[0] &= top; |
| 269 | return true; |
| 270 | } |
| 271 | |
| 272 | template <typename AddressType> |
| 273 | bool DwarfOp<AddressType>::op_div() { |
| 274 | AddressType top = StackPop(); |
| 275 | if (top == 0) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 276 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 277 | return false; |
| 278 | } |
| 279 | SignedType signed_divisor = static_cast<SignedType>(top); |
| 280 | SignedType signed_dividend = static_cast<SignedType>(stack_[0]); |
| 281 | stack_[0] = static_cast<AddressType>(signed_dividend / signed_divisor); |
| 282 | return true; |
| 283 | } |
| 284 | |
| 285 | template <typename AddressType> |
| 286 | bool DwarfOp<AddressType>::op_minus() { |
| 287 | AddressType top = StackPop(); |
| 288 | stack_[0] -= top; |
| 289 | return true; |
| 290 | } |
| 291 | |
| 292 | template <typename AddressType> |
| 293 | bool DwarfOp<AddressType>::op_mod() { |
| 294 | AddressType top = StackPop(); |
| 295 | if (top == 0) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 296 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 297 | return false; |
| 298 | } |
| 299 | stack_[0] %= top; |
| 300 | return true; |
| 301 | } |
| 302 | |
| 303 | template <typename AddressType> |
| 304 | bool DwarfOp<AddressType>::op_mul() { |
| 305 | AddressType top = StackPop(); |
| 306 | stack_[0] *= top; |
| 307 | return true; |
| 308 | } |
| 309 | |
| 310 | template <typename AddressType> |
| 311 | bool DwarfOp<AddressType>::op_neg() { |
| 312 | SignedType signed_value = static_cast<SignedType>(stack_[0]); |
| 313 | stack_[0] = static_cast<AddressType>(-signed_value); |
| 314 | return true; |
| 315 | } |
| 316 | |
| 317 | template <typename AddressType> |
| 318 | bool DwarfOp<AddressType>::op_not() { |
| 319 | stack_[0] = ~stack_[0]; |
| 320 | return true; |
| 321 | } |
| 322 | |
| 323 | template <typename AddressType> |
| 324 | bool DwarfOp<AddressType>::op_or() { |
| 325 | AddressType top = StackPop(); |
| 326 | stack_[0] |= top; |
| 327 | return true; |
| 328 | } |
| 329 | |
| 330 | template <typename AddressType> |
| 331 | bool DwarfOp<AddressType>::op_plus() { |
| 332 | AddressType top = StackPop(); |
| 333 | stack_[0] += top; |
| 334 | return true; |
| 335 | } |
| 336 | |
| 337 | template <typename AddressType> |
| 338 | bool DwarfOp<AddressType>::op_plus_uconst() { |
| 339 | stack_[0] += OperandAt(0); |
| 340 | return true; |
| 341 | } |
| 342 | |
| 343 | template <typename AddressType> |
| 344 | bool DwarfOp<AddressType>::op_shl() { |
| 345 | AddressType top = StackPop(); |
| 346 | stack_[0] <<= top; |
| 347 | return true; |
| 348 | } |
| 349 | |
| 350 | template <typename AddressType> |
| 351 | bool DwarfOp<AddressType>::op_shr() { |
| 352 | AddressType top = StackPop(); |
| 353 | stack_[0] >>= top; |
| 354 | return true; |
| 355 | } |
| 356 | |
| 357 | template <typename AddressType> |
| 358 | bool DwarfOp<AddressType>::op_shra() { |
| 359 | AddressType top = StackPop(); |
| 360 | SignedType signed_value = static_cast<SignedType>(stack_[0]) >> top; |
| 361 | stack_[0] = static_cast<AddressType>(signed_value); |
| 362 | return true; |
| 363 | } |
| 364 | |
| 365 | template <typename AddressType> |
| 366 | bool DwarfOp<AddressType>::op_xor() { |
| 367 | AddressType top = StackPop(); |
| 368 | stack_[0] ^= top; |
| 369 | return true; |
| 370 | } |
| 371 | |
| 372 | template <typename AddressType> |
| 373 | bool DwarfOp<AddressType>::op_bra() { |
| 374 | // Requires one stack element. |
| 375 | AddressType top = StackPop(); |
| 376 | int16_t offset = static_cast<int16_t>(OperandAt(0)); |
| 377 | uint64_t cur_offset; |
| 378 | if (top != 0) { |
| 379 | cur_offset = memory_->cur_offset() + offset; |
| 380 | } else { |
| 381 | cur_offset = memory_->cur_offset() - offset; |
| 382 | } |
| 383 | memory_->set_cur_offset(cur_offset); |
| 384 | return true; |
| 385 | } |
| 386 | |
| 387 | template <typename AddressType> |
| 388 | bool DwarfOp<AddressType>::op_eq() { |
| 389 | AddressType top = StackPop(); |
| 390 | stack_[0] = bool_to_dwarf_bool(stack_[0] == top); |
| 391 | return true; |
| 392 | } |
| 393 | |
| 394 | template <typename AddressType> |
| 395 | bool DwarfOp<AddressType>::op_ge() { |
| 396 | AddressType top = StackPop(); |
| 397 | stack_[0] = bool_to_dwarf_bool(stack_[0] >= top); |
| 398 | return true; |
| 399 | } |
| 400 | |
| 401 | template <typename AddressType> |
| 402 | bool DwarfOp<AddressType>::op_gt() { |
| 403 | AddressType top = StackPop(); |
| 404 | stack_[0] = bool_to_dwarf_bool(stack_[0] > top); |
| 405 | return true; |
| 406 | } |
| 407 | |
| 408 | template <typename AddressType> |
| 409 | bool DwarfOp<AddressType>::op_le() { |
| 410 | AddressType top = StackPop(); |
| 411 | stack_[0] = bool_to_dwarf_bool(stack_[0] <= top); |
| 412 | return true; |
| 413 | } |
| 414 | |
| 415 | template <typename AddressType> |
| 416 | bool DwarfOp<AddressType>::op_lt() { |
| 417 | AddressType top = StackPop(); |
| 418 | stack_[0] = bool_to_dwarf_bool(stack_[0] < top); |
| 419 | return true; |
| 420 | } |
| 421 | |
| 422 | template <typename AddressType> |
| 423 | bool DwarfOp<AddressType>::op_ne() { |
| 424 | AddressType top = StackPop(); |
| 425 | stack_[0] = bool_to_dwarf_bool(stack_[0] != top); |
| 426 | return true; |
| 427 | } |
| 428 | |
| 429 | template <typename AddressType> |
| 430 | bool DwarfOp<AddressType>::op_skip() { |
| 431 | int16_t offset = static_cast<int16_t>(OperandAt(0)); |
| 432 | uint64_t cur_offset = memory_->cur_offset() + offset; |
| 433 | memory_->set_cur_offset(cur_offset); |
| 434 | return true; |
| 435 | } |
| 436 | |
| 437 | template <typename AddressType> |
| 438 | bool DwarfOp<AddressType>::op_lit() { |
| 439 | stack_.push_front(cur_op() - 0x30); |
| 440 | return true; |
| 441 | } |
| 442 | |
| 443 | template <typename AddressType> |
| 444 | bool DwarfOp<AddressType>::op_reg() { |
| 445 | is_register_ = true; |
| 446 | stack_.push_front(cur_op() - 0x50); |
| 447 | return true; |
| 448 | } |
| 449 | |
| 450 | template <typename AddressType> |
| 451 | bool DwarfOp<AddressType>::op_regx() { |
| 452 | is_register_ = true; |
| 453 | stack_.push_front(OperandAt(0)); |
| 454 | return true; |
| 455 | } |
| 456 | |
| 457 | // It's not clear for breg/bregx, if this op should read the current |
| 458 | // value of the register, or where we think that register is located. |
| 459 | // For simplicity, the code will read the value before doing the unwind. |
| 460 | template <typename AddressType> |
| 461 | bool DwarfOp<AddressType>::op_breg() { |
| 462 | uint16_t reg = cur_op() - 0x70; |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 463 | if (reg >= regs_info_->Total()) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 464 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 465 | return false; |
| 466 | } |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 467 | stack_.push_front(regs_info_->Get(reg) + OperandAt(0)); |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 468 | return true; |
| 469 | } |
| 470 | |
| 471 | template <typename AddressType> |
| 472 | bool DwarfOp<AddressType>::op_bregx() { |
| 473 | AddressType reg = OperandAt(0); |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 474 | if (reg >= regs_info_->Total()) { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 475 | last_error_.code = DWARF_ERROR_ILLEGAL_VALUE; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 476 | return false; |
| 477 | } |
Christopher Ferris | 559c7f2 | 2018-02-12 20:18:03 -0800 | [diff] [blame^] | 478 | stack_.push_front(regs_info_->Get(reg) + OperandAt(1)); |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 479 | return true; |
| 480 | } |
| 481 | |
| 482 | template <typename AddressType> |
| 483 | bool DwarfOp<AddressType>::op_nop() { |
| 484 | return true; |
| 485 | } |
| 486 | |
| 487 | template <typename AddressType> |
| 488 | bool DwarfOp<AddressType>::op_not_implemented() { |
Christopher Ferris | 2fcf4cf | 2018-01-23 17:52:23 -0800 | [diff] [blame] | 489 | last_error_.code = DWARF_ERROR_NOT_IMPLEMENTED; |
Christopher Ferris | 55d22ef | 2017-04-04 10:41:31 -0700 | [diff] [blame] | 490 | return false; |
| 491 | } |
| 492 | |
| 493 | // Explicitly instantiate DwarfOp. |
| 494 | template class DwarfOp<uint32_t>; |
| 495 | template class DwarfOp<uint64_t>; |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame] | 496 | |
| 497 | } // namespace unwindstack |