Christopher Ferris | 8642fcb | 2017-04-24 11:14:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 <inttypes.h> |
| 18 | #include <stdint.h> |
| 19 | |
| 20 | #include <string> |
| 21 | #include <type_traits> |
| 22 | #include <vector> |
| 23 | |
| 24 | #include <android-base/stringprintf.h> |
| 25 | |
| 26 | #include "DwarfCfa.h" |
| 27 | #include "DwarfEncoding.h" |
| 28 | #include "DwarfMemory.h" |
| 29 | #include "DwarfOp.h" |
| 30 | #include "DwarfStructs.h" |
| 31 | #include "Log.h" |
| 32 | |
| 33 | template <typename AddressType> |
| 34 | constexpr typename DwarfCfa<AddressType>::process_func DwarfCfa<AddressType>::kCallbackTable[64]; |
| 35 | |
| 36 | template <typename AddressType> |
| 37 | bool DwarfCfa<AddressType>::GetLocationInfo(uint64_t pc, uint64_t start_offset, uint64_t end_offset, |
| 38 | dwarf_loc_regs_t* loc_regs) { |
| 39 | if (cie_loc_regs_ != nullptr) { |
| 40 | for (const auto& entry : *cie_loc_regs_) { |
| 41 | (*loc_regs)[entry.first] = entry.second; |
| 42 | } |
| 43 | } |
| 44 | last_error_ = DWARF_ERROR_NONE; |
| 45 | |
| 46 | memory_->set_cur_offset(start_offset); |
| 47 | uint64_t cfa_offset; |
| 48 | cur_pc_ = fde_->pc_start; |
| 49 | while ((cfa_offset = memory_->cur_offset()) < end_offset && cur_pc_ <= pc) { |
| 50 | operands_.clear(); |
| 51 | // Read the cfa information. |
| 52 | uint8_t cfa_value; |
| 53 | if (!memory_->ReadBytes(&cfa_value, 1)) { |
| 54 | last_error_ = DWARF_ERROR_MEMORY_INVALID; |
| 55 | return false; |
| 56 | } |
| 57 | uint8_t cfa_low = cfa_value & 0x3f; |
| 58 | // Check the 2 high bits. |
| 59 | switch (cfa_value >> 6) { |
| 60 | case 1: |
| 61 | cur_pc_ += cfa_low * fde_->cie->code_alignment_factor; |
| 62 | break; |
| 63 | case 2: { |
| 64 | uint64_t offset; |
| 65 | if (!memory_->ReadULEB128(&offset)) { |
| 66 | last_error_ = DWARF_ERROR_MEMORY_INVALID; |
| 67 | return false; |
| 68 | } |
| 69 | SignedType signed_offset = |
| 70 | static_cast<SignedType>(offset) * fde_->cie->data_alignment_factor; |
| 71 | (*loc_regs)[cfa_low] = {.type = DWARF_LOCATION_OFFSET, |
| 72 | .values = {static_cast<uint64_t>(signed_offset)}}; |
| 73 | break; |
| 74 | } |
| 75 | case 3: { |
| 76 | if (cie_loc_regs_ == nullptr) { |
| 77 | log(0, "restore while processing cie"); |
| 78 | last_error_ = DWARF_ERROR_ILLEGAL_STATE; |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | auto reg_entry = cie_loc_regs_->find(cfa_low); |
| 83 | if (reg_entry == cie_loc_regs_->end()) { |
| 84 | loc_regs->erase(cfa_low); |
| 85 | } else { |
| 86 | (*loc_regs)[cfa_low] = reg_entry->second; |
| 87 | } |
| 88 | break; |
| 89 | } |
| 90 | case 0: { |
| 91 | const auto handle_func = DwarfCfa<AddressType>::kCallbackTable[cfa_low]; |
| 92 | if (handle_func == nullptr) { |
| 93 | last_error_ = DWARF_ERROR_ILLEGAL_VALUE; |
| 94 | return false; |
| 95 | } |
| 96 | |
| 97 | const auto cfa = &DwarfCfaInfo::kTable[cfa_low]; |
| 98 | for (size_t i = 0; i < cfa->num_operands; i++) { |
| 99 | if (cfa->operands[i] == DW_EH_PE_block) { |
| 100 | uint64_t block_length; |
| 101 | if (!memory_->ReadULEB128(&block_length)) { |
| 102 | last_error_ = DWARF_ERROR_MEMORY_INVALID; |
| 103 | return false; |
| 104 | } |
| 105 | operands_.push_back(block_length); |
| 106 | memory_->set_cur_offset(memory_->cur_offset() + block_length); |
| 107 | continue; |
| 108 | } |
| 109 | uint64_t value; |
| 110 | if (!memory_->ReadEncodedValue<AddressType>(cfa->operands[i], &value)) { |
| 111 | last_error_ = DWARF_ERROR_MEMORY_INVALID; |
| 112 | return false; |
| 113 | } |
| 114 | operands_.push_back(value); |
| 115 | } |
| 116 | |
| 117 | if (!(this->*handle_func)(loc_regs)) { |
| 118 | return false; |
| 119 | } |
| 120 | break; |
| 121 | } |
| 122 | } |
| 123 | } |
| 124 | return true; |
| 125 | } |
| 126 | |
| 127 | template <typename AddressType> |
| 128 | std::string DwarfCfa<AddressType>::GetOperandString(uint8_t operand, uint64_t value, |
| 129 | uint64_t* cur_pc) { |
| 130 | std::string string; |
| 131 | switch (operand) { |
| 132 | case DwarfCfaInfo::DWARF_DISPLAY_REGISTER: |
| 133 | string = " register(" + std::to_string(value) + ")"; |
| 134 | break; |
| 135 | case DwarfCfaInfo::DWARF_DISPLAY_SIGNED_NUMBER: |
| 136 | string += " " + std::to_string(static_cast<SignedType>(value)); |
| 137 | break; |
| 138 | case DwarfCfaInfo::DWARF_DISPLAY_ADVANCE_LOC: |
| 139 | *cur_pc += value; |
| 140 | // Fall through to log the value. |
| 141 | case DwarfCfaInfo::DWARF_DISPLAY_NUMBER: |
| 142 | string += " " + std::to_string(value); |
| 143 | break; |
| 144 | case DwarfCfaInfo::DWARF_DISPLAY_SET_LOC: |
| 145 | *cur_pc = value; |
| 146 | // Fall through to log the value. |
| 147 | case DwarfCfaInfo::DWARF_DISPLAY_ADDRESS: |
| 148 | if (std::is_same<AddressType, uint32_t>::value) { |
| 149 | string += android::base::StringPrintf(" 0x%" PRIx32, static_cast<uint32_t>(value)); |
| 150 | } else { |
| 151 | string += android::base::StringPrintf(" 0x%" PRIx64, static_cast<uint64_t>(value)); |
| 152 | } |
| 153 | break; |
| 154 | default: |
| 155 | string = " unknown"; |
| 156 | } |
| 157 | return string; |
| 158 | } |
| 159 | |
| 160 | template <typename AddressType> |
| 161 | bool DwarfCfa<AddressType>::LogOffsetRegisterString(uint32_t indent, uint64_t cfa_offset, |
| 162 | uint8_t reg) { |
| 163 | uint64_t offset; |
| 164 | if (!memory_->ReadULEB128(&offset)) { |
| 165 | return false; |
| 166 | } |
| 167 | uint64_t end_offset = memory_->cur_offset(); |
| 168 | memory_->set_cur_offset(cfa_offset); |
| 169 | |
| 170 | std::string raw_data = "Raw Data:"; |
| 171 | for (uint64_t i = cfa_offset; i < end_offset; i++) { |
| 172 | uint8_t value; |
| 173 | if (!memory_->ReadBytes(&value, 1)) { |
| 174 | return false; |
| 175 | } |
| 176 | raw_data += android::base::StringPrintf(" 0x%02x", value); |
| 177 | } |
| 178 | log(indent, "DW_CFA_offset register(%d) %" PRId64, reg, offset); |
| 179 | log(indent, "%s", raw_data.c_str()); |
| 180 | return true; |
| 181 | } |
| 182 | |
| 183 | template <typename AddressType> |
| 184 | bool DwarfCfa<AddressType>::LogInstruction(uint32_t indent, uint64_t cfa_offset, uint8_t op, |
| 185 | uint64_t* cur_pc) { |
| 186 | const auto* cfa = &DwarfCfaInfo::kTable[op]; |
| 187 | if (cfa->name == nullptr) { |
| 188 | log(indent, "Illegal"); |
| 189 | log(indent, "Raw Data: 0x%02x", op); |
| 190 | return true; |
| 191 | } |
| 192 | |
| 193 | std::string log_string(cfa->name); |
| 194 | std::vector<std::string> expression_lines; |
| 195 | for (size_t i = 0; i < cfa->num_operands; i++) { |
| 196 | if (cfa->operands[i] == DW_EH_PE_block) { |
| 197 | // This is a Dwarf Expression. |
| 198 | uint64_t end_offset; |
| 199 | if (!memory_->ReadULEB128(&end_offset)) { |
| 200 | return false; |
| 201 | } |
| 202 | log_string += " " + std::to_string(end_offset); |
| 203 | end_offset += memory_->cur_offset(); |
| 204 | |
| 205 | DwarfOp<AddressType> op(memory_, nullptr); |
| 206 | op.GetLogInfo(memory_->cur_offset(), end_offset, &expression_lines); |
| 207 | memory_->set_cur_offset(end_offset); |
| 208 | } else { |
| 209 | uint64_t value; |
| 210 | if (!memory_->ReadEncodedValue<AddressType>(cfa->operands[i], &value)) { |
| 211 | return false; |
| 212 | } |
| 213 | log_string += GetOperandString(cfa->display_operands[i], value, cur_pc); |
| 214 | } |
| 215 | } |
| 216 | log(indent, "%s", log_string.c_str()); |
| 217 | |
| 218 | // Get the raw bytes of the data. |
| 219 | uint64_t end_offset = memory_->cur_offset(); |
| 220 | memory_->set_cur_offset(cfa_offset); |
| 221 | std::string raw_data("Raw Data:"); |
| 222 | for (uint64_t i = 0; i < end_offset - cfa_offset; i++) { |
| 223 | uint8_t value; |
| 224 | if (!memory_->ReadBytes(&value, 1)) { |
| 225 | return false; |
| 226 | } |
| 227 | |
| 228 | // Only show 10 raw bytes per line. |
| 229 | if ((i % 10) == 0 && i != 0) { |
| 230 | log(indent, "%s", raw_data.c_str()); |
| 231 | raw_data.clear(); |
| 232 | } |
| 233 | if (raw_data.empty()) { |
| 234 | raw_data = "Raw Data:"; |
| 235 | } |
| 236 | raw_data += android::base::StringPrintf(" 0x%02x", value); |
| 237 | } |
| 238 | if (!raw_data.empty()) { |
| 239 | log(indent, "%s", raw_data.c_str()); |
| 240 | } |
| 241 | |
| 242 | // Log any of the expression data. |
| 243 | for (const auto line : expression_lines) { |
| 244 | log(indent + 1, "%s", line.c_str()); |
| 245 | } |
| 246 | return true; |
| 247 | } |
| 248 | |
| 249 | template <typename AddressType> |
| 250 | bool DwarfCfa<AddressType>::Log(uint32_t indent, uint64_t pc, uint64_t load_bias, |
| 251 | uint64_t start_offset, uint64_t end_offset) { |
| 252 | memory_->set_cur_offset(start_offset); |
| 253 | uint64_t cfa_offset; |
| 254 | uint64_t cur_pc = fde_->pc_start; |
| 255 | uint64_t old_pc = cur_pc; |
| 256 | while ((cfa_offset = memory_->cur_offset()) < end_offset && cur_pc <= pc) { |
| 257 | // Read the cfa information. |
| 258 | uint8_t cfa_value; |
| 259 | if (!memory_->ReadBytes(&cfa_value, 1)) { |
| 260 | return false; |
| 261 | } |
| 262 | |
| 263 | // Check the 2 high bits. |
| 264 | uint8_t cfa_low = cfa_value & 0x3f; |
| 265 | switch (cfa_value >> 6) { |
| 266 | case 0: |
| 267 | if (!LogInstruction(indent, cfa_offset, cfa_low, &cur_pc)) { |
| 268 | return false; |
| 269 | } |
| 270 | break; |
| 271 | case 1: |
| 272 | log(indent, "DW_CFA_advance_loc %d", cfa_low); |
| 273 | log(indent, "Raw Data: 0x%02x", cfa_value); |
| 274 | cur_pc += cfa_low * fde_->cie->code_alignment_factor; |
| 275 | break; |
| 276 | case 2: |
| 277 | if (!LogOffsetRegisterString(indent, cfa_offset, cfa_low)) { |
| 278 | return false; |
| 279 | } |
| 280 | break; |
| 281 | case 3: |
| 282 | log(indent, "DW_CFA_restore register(%d)", cfa_low); |
| 283 | log(indent, "Raw Data: 0x%02x", cfa_value); |
| 284 | break; |
| 285 | } |
| 286 | if (cur_pc != old_pc) { |
| 287 | log(indent, ""); |
| 288 | log(indent, "PC 0x%" PRIx64, cur_pc + load_bias); |
| 289 | } |
| 290 | old_pc = cur_pc; |
| 291 | } |
| 292 | return true; |
| 293 | } |
| 294 | |
| 295 | // Static data. |
| 296 | template <typename AddressType> |
| 297 | bool DwarfCfa<AddressType>::cfa_nop(dwarf_loc_regs_t*) { |
| 298 | return true; |
| 299 | } |
| 300 | |
| 301 | template <typename AddressType> |
| 302 | bool DwarfCfa<AddressType>::cfa_set_loc(dwarf_loc_regs_t*) { |
| 303 | AddressType cur_pc = cur_pc_; |
| 304 | AddressType new_pc = operands_[0]; |
| 305 | if (new_pc < cur_pc) { |
| 306 | if (std::is_same<AddressType, uint32_t>::value) { |
| 307 | log(0, "Warning: PC is moving backwards: old 0x%" PRIx32 " new 0x%" PRIx32, cur_pc, new_pc); |
| 308 | } else { |
| 309 | log(0, "Warning: PC is moving backwards: old 0x%" PRIx64 " new 0x%" PRIx64, cur_pc, new_pc); |
| 310 | } |
| 311 | } |
| 312 | cur_pc_ = new_pc; |
| 313 | return true; |
| 314 | } |
| 315 | |
| 316 | template <typename AddressType> |
| 317 | bool DwarfCfa<AddressType>::cfa_advance_loc(dwarf_loc_regs_t*) { |
| 318 | cur_pc_ += operands_[0] * fde_->cie->code_alignment_factor; |
| 319 | return true; |
| 320 | } |
| 321 | |
| 322 | template <typename AddressType> |
| 323 | bool DwarfCfa<AddressType>::cfa_offset(dwarf_loc_regs_t* loc_regs) { |
| 324 | AddressType reg = operands_[0]; |
| 325 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {operands_[1]}}; |
| 326 | return true; |
| 327 | } |
| 328 | |
| 329 | template <typename AddressType> |
| 330 | bool DwarfCfa<AddressType>::cfa_restore(dwarf_loc_regs_t* loc_regs) { |
| 331 | AddressType reg = operands_[0]; |
| 332 | if (cie_loc_regs_ == nullptr) { |
| 333 | log(0, "restore while processing cie"); |
| 334 | last_error_ = DWARF_ERROR_ILLEGAL_STATE; |
| 335 | return false; |
| 336 | } |
| 337 | auto reg_entry = cie_loc_regs_->find(reg); |
| 338 | if (reg_entry == cie_loc_regs_->end()) { |
| 339 | loc_regs->erase(reg); |
| 340 | } else { |
| 341 | (*loc_regs)[reg] = reg_entry->second; |
| 342 | } |
| 343 | return true; |
| 344 | } |
| 345 | |
| 346 | template <typename AddressType> |
| 347 | bool DwarfCfa<AddressType>::cfa_undefined(dwarf_loc_regs_t* loc_regs) { |
| 348 | AddressType reg = operands_[0]; |
| 349 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_UNDEFINED}; |
| 350 | return true; |
| 351 | } |
| 352 | |
| 353 | template <typename AddressType> |
| 354 | bool DwarfCfa<AddressType>::cfa_same_value(dwarf_loc_regs_t* loc_regs) { |
| 355 | AddressType reg = operands_[0]; |
| 356 | loc_regs->erase(reg); |
| 357 | return true; |
| 358 | } |
| 359 | |
| 360 | template <typename AddressType> |
| 361 | bool DwarfCfa<AddressType>::cfa_register(dwarf_loc_regs_t* loc_regs) { |
| 362 | AddressType reg = operands_[0]; |
| 363 | AddressType reg_dst = operands_[1]; |
| 364 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_REGISTER, .values = {reg_dst}}; |
| 365 | return true; |
| 366 | } |
| 367 | |
| 368 | template <typename AddressType> |
| 369 | bool DwarfCfa<AddressType>::cfa_remember_state(dwarf_loc_regs_t* loc_regs) { |
| 370 | loc_reg_state_.push(*loc_regs); |
| 371 | return true; |
| 372 | } |
| 373 | |
| 374 | template <typename AddressType> |
| 375 | bool DwarfCfa<AddressType>::cfa_restore_state(dwarf_loc_regs_t* loc_regs) { |
| 376 | if (loc_reg_state_.size() == 0) { |
| 377 | log(0, "Warning: Attempt to restore without remember."); |
| 378 | return true; |
| 379 | } |
| 380 | *loc_regs = loc_reg_state_.top(); |
| 381 | loc_reg_state_.pop(); |
| 382 | return true; |
| 383 | } |
| 384 | |
| 385 | template <typename AddressType> |
| 386 | bool DwarfCfa<AddressType>::cfa_def_cfa(dwarf_loc_regs_t* loc_regs) { |
| 387 | (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_REGISTER, .values = {operands_[0], operands_[1]}}; |
| 388 | return true; |
| 389 | } |
| 390 | |
| 391 | template <typename AddressType> |
| 392 | bool DwarfCfa<AddressType>::cfa_def_cfa_register(dwarf_loc_regs_t* loc_regs) { |
| 393 | auto cfa_location = loc_regs->find(CFA_REG); |
| 394 | if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) { |
| 395 | log(0, "Attempt to set new register, but cfa is not already set to a register."); |
| 396 | last_error_ = DWARF_ERROR_ILLEGAL_STATE; |
| 397 | return false; |
| 398 | } |
| 399 | |
| 400 | cfa_location->second.values[0] = operands_[0]; |
| 401 | return true; |
| 402 | } |
| 403 | |
| 404 | template <typename AddressType> |
| 405 | bool DwarfCfa<AddressType>::cfa_def_cfa_offset(dwarf_loc_regs_t* loc_regs) { |
| 406 | // Changing the offset if this is not a register is illegal. |
| 407 | auto cfa_location = loc_regs->find(CFA_REG); |
| 408 | if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) { |
| 409 | log(0, "Attempt to set offset, but cfa is not set to a register."); |
| 410 | last_error_ = DWARF_ERROR_ILLEGAL_STATE; |
| 411 | return false; |
| 412 | } |
| 413 | cfa_location->second.values[1] = operands_[0]; |
| 414 | return true; |
| 415 | } |
| 416 | |
| 417 | template <typename AddressType> |
| 418 | bool DwarfCfa<AddressType>::cfa_def_cfa_expression(dwarf_loc_regs_t* loc_regs) { |
| 419 | (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_EXPRESSION, |
| 420 | .values = {operands_[0], memory_->cur_offset()}}; |
| 421 | return true; |
| 422 | } |
| 423 | |
| 424 | template <typename AddressType> |
| 425 | bool DwarfCfa<AddressType>::cfa_expression(dwarf_loc_regs_t* loc_regs) { |
| 426 | AddressType reg = operands_[0]; |
| 427 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_EXPRESSION, |
| 428 | .values = {operands_[1], memory_->cur_offset()}}; |
| 429 | return true; |
| 430 | } |
| 431 | |
| 432 | template <typename AddressType> |
| 433 | bool DwarfCfa<AddressType>::cfa_offset_extended_sf(dwarf_loc_regs_t* loc_regs) { |
| 434 | AddressType reg = operands_[0]; |
| 435 | SignedType value = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor; |
| 436 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {static_cast<uint64_t>(value)}}; |
| 437 | return true; |
| 438 | } |
| 439 | |
| 440 | template <typename AddressType> |
| 441 | bool DwarfCfa<AddressType>::cfa_def_cfa_sf(dwarf_loc_regs_t* loc_regs) { |
| 442 | SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor; |
| 443 | (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_REGISTER, |
| 444 | .values = {operands_[0], static_cast<uint64_t>(offset)}}; |
| 445 | return true; |
| 446 | } |
| 447 | |
| 448 | template <typename AddressType> |
| 449 | bool DwarfCfa<AddressType>::cfa_def_cfa_offset_sf(dwarf_loc_regs_t* loc_regs) { |
| 450 | // Changing the offset if this is not a register is illegal. |
| 451 | auto cfa_location = loc_regs->find(CFA_REG); |
| 452 | if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) { |
| 453 | log(0, "Attempt to set offset, but cfa is not set to a register."); |
| 454 | last_error_ = DWARF_ERROR_ILLEGAL_STATE; |
| 455 | return false; |
| 456 | } |
| 457 | SignedType offset = static_cast<SignedType>(operands_[0]) * fde_->cie->data_alignment_factor; |
| 458 | cfa_location->second.values[1] = static_cast<uint64_t>(offset); |
| 459 | return true; |
| 460 | } |
| 461 | |
| 462 | template <typename AddressType> |
| 463 | bool DwarfCfa<AddressType>::cfa_val_offset(dwarf_loc_regs_t* loc_regs) { |
| 464 | AddressType reg = operands_[0]; |
| 465 | SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor; |
| 466 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_OFFSET, .values = {static_cast<uint64_t>(offset)}}; |
| 467 | return true; |
| 468 | } |
| 469 | |
| 470 | template <typename AddressType> |
| 471 | bool DwarfCfa<AddressType>::cfa_val_offset_sf(dwarf_loc_regs_t* loc_regs) { |
| 472 | AddressType reg = operands_[0]; |
| 473 | SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor; |
| 474 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_OFFSET, .values = {static_cast<uint64_t>(offset)}}; |
| 475 | return true; |
| 476 | } |
| 477 | |
| 478 | template <typename AddressType> |
| 479 | bool DwarfCfa<AddressType>::cfa_val_expression(dwarf_loc_regs_t* loc_regs) { |
| 480 | AddressType reg = operands_[0]; |
| 481 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_EXPRESSION, |
| 482 | .values = {operands_[1], memory_->cur_offset()}}; |
| 483 | return true; |
| 484 | } |
| 485 | |
| 486 | template <typename AddressType> |
| 487 | bool DwarfCfa<AddressType>::cfa_gnu_negative_offset_extended(dwarf_loc_regs_t* loc_regs) { |
| 488 | AddressType reg = operands_[0]; |
| 489 | SignedType offset = -static_cast<SignedType>(operands_[1]); |
| 490 | (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {static_cast<uint64_t>(offset)}}; |
| 491 | return true; |
| 492 | } |
| 493 | |
| 494 | const DwarfCfaInfo::Info DwarfCfaInfo::kTable[64] = { |
| 495 | { |
| 496 | // 0x00 DW_CFA_nop |
| 497 | "DW_CFA_nop", |
| 498 | 2, |
| 499 | 0, |
| 500 | {}, |
| 501 | {}, |
| 502 | }, |
| 503 | { |
| 504 | "DW_CFA_set_loc", // 0x01 DW_CFA_set_loc |
| 505 | 2, |
| 506 | 1, |
| 507 | {DW_EH_PE_absptr}, |
| 508 | {DWARF_DISPLAY_SET_LOC}, |
| 509 | }, |
| 510 | { |
| 511 | "DW_CFA_advance_loc1", // 0x02 DW_CFA_advance_loc1 |
| 512 | 2, |
| 513 | 1, |
| 514 | {DW_EH_PE_udata1}, |
| 515 | {DWARF_DISPLAY_ADVANCE_LOC}, |
| 516 | }, |
| 517 | { |
| 518 | "DW_CFA_advance_loc2", // 0x03 DW_CFA_advance_loc2 |
| 519 | 2, |
| 520 | 1, |
| 521 | {DW_EH_PE_udata2}, |
| 522 | {DWARF_DISPLAY_ADVANCE_LOC}, |
| 523 | }, |
| 524 | { |
| 525 | "DW_CFA_advance_loc4", // 0x04 DW_CFA_advance_loc4 |
| 526 | 2, |
| 527 | 1, |
| 528 | {DW_EH_PE_udata4}, |
| 529 | {DWARF_DISPLAY_ADVANCE_LOC}, |
| 530 | }, |
| 531 | { |
| 532 | "DW_CFA_offset_extended", // 0x05 DW_CFA_offset_extended |
| 533 | 2, |
| 534 | 2, |
| 535 | {DW_EH_PE_uleb128, DW_EH_PE_uleb128}, |
| 536 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER}, |
| 537 | }, |
| 538 | { |
| 539 | "DW_CFA_restore_extended", // 0x06 DW_CFA_restore_extended |
| 540 | 2, |
| 541 | 1, |
| 542 | {DW_EH_PE_uleb128}, |
| 543 | {DWARF_DISPLAY_REGISTER}, |
| 544 | }, |
| 545 | { |
| 546 | "DW_CFA_undefined", // 0x07 DW_CFA_undefined |
| 547 | 2, |
| 548 | 1, |
| 549 | {DW_EH_PE_uleb128}, |
| 550 | {DWARF_DISPLAY_REGISTER}, |
| 551 | }, |
| 552 | { |
| 553 | "DW_CFA_same_value", // 0x08 DW_CFA_same_value |
| 554 | 2, |
| 555 | 1, |
| 556 | {DW_EH_PE_uleb128}, |
| 557 | {DWARF_DISPLAY_REGISTER}, |
| 558 | }, |
| 559 | { |
| 560 | "DW_CFA_register", // 0x09 DW_CFA_register |
| 561 | 2, |
| 562 | 2, |
| 563 | {DW_EH_PE_uleb128, DW_EH_PE_uleb128}, |
| 564 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_REGISTER}, |
| 565 | }, |
| 566 | { |
| 567 | "DW_CFA_remember_state", // 0x0a DW_CFA_remember_state |
| 568 | 2, |
| 569 | 0, |
| 570 | {}, |
| 571 | {}, |
| 572 | }, |
| 573 | { |
| 574 | "DW_CFA_restore_state", // 0x0b DW_CFA_restore_state |
| 575 | 2, |
| 576 | 0, |
| 577 | {}, |
| 578 | {}, |
| 579 | }, |
| 580 | { |
| 581 | "DW_CFA_def_cfa", // 0x0c DW_CFA_def_cfa |
| 582 | 2, |
| 583 | 2, |
| 584 | {DW_EH_PE_uleb128, DW_EH_PE_uleb128}, |
| 585 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER}, |
| 586 | }, |
| 587 | { |
| 588 | "DW_CFA_def_cfa_register", // 0x0d DW_CFA_def_cfa_register |
| 589 | 2, |
| 590 | 1, |
| 591 | {DW_EH_PE_uleb128}, |
| 592 | {DWARF_DISPLAY_REGISTER}, |
| 593 | }, |
| 594 | { |
| 595 | "DW_CFA_def_cfa_offset", // 0x0e DW_CFA_def_cfa_offset |
| 596 | 2, |
| 597 | 1, |
| 598 | {DW_EH_PE_uleb128}, |
| 599 | {DWARF_DISPLAY_NUMBER}, |
| 600 | }, |
| 601 | { |
| 602 | "DW_CFA_def_cfa_expression", // 0x0f DW_CFA_def_cfa_expression |
| 603 | 2, |
| 604 | 1, |
| 605 | {DW_EH_PE_block}, |
| 606 | {DWARF_DISPLAY_EVAL_BLOCK}, |
| 607 | }, |
| 608 | { |
| 609 | "DW_CFA_expression", // 0x10 DW_CFA_expression |
| 610 | 2, |
| 611 | 2, |
| 612 | {DW_EH_PE_uleb128, DW_EH_PE_block}, |
| 613 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_EVAL_BLOCK}, |
| 614 | }, |
| 615 | { |
| 616 | "DW_CFA_offset_extended_sf", // 0x11 DW_CFA_offset_extend_sf |
| 617 | 2, |
| 618 | 2, |
| 619 | {DW_EH_PE_uleb128, DW_EH_PE_sleb128}, |
| 620 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER}, |
| 621 | }, |
| 622 | { |
| 623 | "DW_CFA_def_cfa_sf", // 0x12 DW_CFA_def_cfa_sf |
| 624 | 2, |
| 625 | 2, |
| 626 | {DW_EH_PE_uleb128, DW_EH_PE_sleb128}, |
| 627 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER}, |
| 628 | }, |
| 629 | { |
| 630 | "DW_CFA_def_cfa_offset_sf", // 0x13 DW_CFA_def_cfa_offset_sf |
| 631 | 2, |
| 632 | 1, |
| 633 | {DW_EH_PE_sleb128}, |
| 634 | {DWARF_DISPLAY_SIGNED_NUMBER}, |
| 635 | }, |
| 636 | { |
| 637 | "DW_CFA_val_offset", // 0x14 DW_CFA_val_offset |
| 638 | 2, |
| 639 | 2, |
| 640 | {DW_EH_PE_uleb128, DW_EH_PE_uleb128}, |
| 641 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER}, |
| 642 | }, |
| 643 | { |
| 644 | "DW_CFA_val_offset_sf", // 0x15 DW_CFA_val_offset_sf |
| 645 | 2, |
| 646 | 2, |
| 647 | {DW_EH_PE_uleb128, DW_EH_PE_sleb128}, |
| 648 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER}, |
| 649 | }, |
| 650 | { |
| 651 | "DW_CFA_val_expression", // 0x16 DW_CFA_val_expression |
| 652 | 2, |
| 653 | 2, |
| 654 | {DW_EH_PE_uleb128, DW_EH_PE_block}, |
| 655 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_EVAL_BLOCK}, |
| 656 | }, |
| 657 | {nullptr, 0, 0, {}, {}}, // 0x17 illegal cfa |
| 658 | {nullptr, 0, 0, {}, {}}, // 0x18 illegal cfa |
| 659 | {nullptr, 0, 0, {}, {}}, // 0x19 illegal cfa |
| 660 | {nullptr, 0, 0, {}, {}}, // 0x1a illegal cfa |
| 661 | {nullptr, 0, 0, {}, {}}, // 0x1b illegal cfa |
| 662 | {nullptr, 0, 0, {}, {}}, // 0x1c DW_CFA_lo_user (Treat as illegal) |
| 663 | {nullptr, 0, 0, {}, {}}, // 0x1d illegal cfa |
| 664 | {nullptr, 0, 0, {}, {}}, // 0x1e illegal cfa |
| 665 | {nullptr, 0, 0, {}, {}}, // 0x1f illegal cfa |
| 666 | {nullptr, 0, 0, {}, {}}, // 0x20 illegal cfa |
| 667 | {nullptr, 0, 0, {}, {}}, // 0x21 illegal cfa |
| 668 | {nullptr, 0, 0, {}, {}}, // 0x22 illegal cfa |
| 669 | {nullptr, 0, 0, {}, {}}, // 0x23 illegal cfa |
| 670 | {nullptr, 0, 0, {}, {}}, // 0x24 illegal cfa |
| 671 | {nullptr, 0, 0, {}, {}}, // 0x25 illegal cfa |
| 672 | {nullptr, 0, 0, {}, {}}, // 0x26 illegal cfa |
| 673 | {nullptr, 0, 0, {}, {}}, // 0x27 illegal cfa |
| 674 | {nullptr, 0, 0, {}, {}}, // 0x28 illegal cfa |
| 675 | {nullptr, 0, 0, {}, {}}, // 0x29 illegal cfa |
| 676 | {nullptr, 0, 0, {}, {}}, // 0x2a illegal cfa |
| 677 | {nullptr, 0, 0, {}, {}}, // 0x2b illegal cfa |
| 678 | {nullptr, 0, 0, {}, {}}, // 0x2c illegal cfa |
| 679 | {nullptr, 0, 0, {}, {}}, // 0x2d DW_CFA_GNU_window_save (Treat as illegal) |
| 680 | { |
| 681 | "DW_CFA_GNU_args_size", // 0x2e DW_CFA_GNU_args_size |
| 682 | 2, |
| 683 | 1, |
| 684 | {DW_EH_PE_uleb128}, |
| 685 | {DWARF_DISPLAY_NUMBER}, |
| 686 | }, |
| 687 | { |
| 688 | "DW_CFA_GNU_negative_offset_extended", // 0x2f DW_CFA_GNU_negative_offset_extended |
| 689 | 2, |
| 690 | 2, |
| 691 | {DW_EH_PE_uleb128, DW_EH_PE_uleb128}, |
| 692 | {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER}, |
| 693 | }, |
| 694 | {nullptr, 0, 0, {}, {}}, // 0x31 illegal cfa |
| 695 | {nullptr, 0, 0, {}, {}}, // 0x32 illegal cfa |
| 696 | {nullptr, 0, 0, {}, {}}, // 0x33 illegal cfa |
| 697 | {nullptr, 0, 0, {}, {}}, // 0x34 illegal cfa |
| 698 | {nullptr, 0, 0, {}, {}}, // 0x35 illegal cfa |
| 699 | {nullptr, 0, 0, {}, {}}, // 0x36 illegal cfa |
| 700 | {nullptr, 0, 0, {}, {}}, // 0x37 illegal cfa |
| 701 | {nullptr, 0, 0, {}, {}}, // 0x38 illegal cfa |
| 702 | {nullptr, 0, 0, {}, {}}, // 0x39 illegal cfa |
| 703 | {nullptr, 0, 0, {}, {}}, // 0x3a illegal cfa |
| 704 | {nullptr, 0, 0, {}, {}}, // 0x3b illegal cfa |
| 705 | {nullptr, 0, 0, {}, {}}, // 0x3c illegal cfa |
| 706 | {nullptr, 0, 0, {}, {}}, // 0x3d illegal cfa |
| 707 | {nullptr, 0, 0, {}, {}}, // 0x3e illegal cfa |
| 708 | {nullptr, 0, 0, {}, {}}, // 0x3f DW_CFA_hi_user (Treat as illegal) |
| 709 | }; |
| 710 | |
| 711 | // Explicitly instantiate DwarfCfa. |
| 712 | template class DwarfCfa<uint32_t>; |
| 713 | template class DwarfCfa<uint64_t>; |