1 //===-- ARMWinEHPrinter.cpp - Windows on ARM EH Data Printer ----*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // Windows on ARM uses a series of serialised data structures (RuntimeFunction) 10 // to create a table of information for unwinding. In order to conserve space, 11 // there are two different ways that this data is represented. 12 // 13 // For functions with canonical forms for the prologue and epilogue, the data 14 // can be stored in a "packed" form. In this case, the data is packed into the 15 // RuntimeFunction's remaining 30-bits and can fully describe the entire frame. 16 // 17 // +---------------------------------------+ 18 // | Function Entry Address | 19 // +---------------------------------------+ 20 // | Packed Form Data | 21 // +---------------------------------------+ 22 // 23 // This layout is parsed by Decoder::dumpPackedEntry. No unwind bytecode is 24 // associated with such a frame as they can be derived from the provided data. 25 // The decoder does not synthesize this data as it is unnecessary for the 26 // purposes of validation, with the synthesis being required only by a proper 27 // unwinder. 28 // 29 // For functions that are large or do not match canonical forms, the data is 30 // split up into two portions, with the actual data residing in the "exception 31 // data" table (.xdata) with a reference to the entry from the "procedure data" 32 // (.pdata) entry. 33 // 34 // The exception data contains information about the frame setup, all of the 35 // epilogue scopes (for functions for which there are multiple exit points) and 36 // the associated exception handler. Additionally, the entry contains byte-code 37 // describing how to unwind the function (c.f. Decoder::decodeOpcodes). 38 // 39 // +---------------------------------------+ 40 // | Function Entry Address | 41 // +---------------------------------------+ 42 // | Exception Data Entry Address | 43 // +---------------------------------------+ 44 // 45 // This layout is parsed by Decoder::dumpUnpackedEntry. Such an entry must 46 // first resolve the exception data entry address. This structure 47 // (ExceptionDataRecord) has a variable sized header 48 // (c.f. ARM::WinEH::HeaderWords) and encodes most of the same information as 49 // the packed form. However, because this information is insufficient to 50 // synthesize the unwinding, there are associated unwinding bytecode which make 51 // up the bulk of the Decoder. 52 // 53 // The decoder itself is table-driven, using the first byte to determine the 54 // opcode and dispatching to the associated printing routine. The bytecode 55 // itself is a variable length instruction encoding that can fully describe the 56 // state of the stack and the necessary operations for unwinding to the 57 // beginning of the frame. 58 // 59 // The byte-code maintains a 1-1 instruction mapping, indicating both the width 60 // of the instruction (Thumb2 instructions are variable length, 16 or 32 bits 61 // wide) allowing the program to unwind from any point in the prologue, body, or 62 // epilogue of the function. 63 64 #include "ARMWinEHPrinter.h" 65 #include "Error.h" 66 #include "llvm/ADT/STLExtras.h" 67 #include "llvm/ADT/StringExtras.h" 68 #include "llvm/Support/ARMWinEH.h" 69 #include "llvm/Support/Format.h" 70 71 using namespace llvm; 72 using namespace llvm::object; 73 using namespace llvm::support; 74 75 namespace llvm { 76 raw_ostream &operator<<(raw_ostream &OS, const ARM::WinEH::ReturnType &RT) { 77 switch (RT) { 78 case ARM::WinEH::ReturnType::RT_POP: 79 OS << "pop {pc}"; 80 break; 81 case ARM::WinEH::ReturnType::RT_B: 82 OS << "b target"; 83 break; 84 case ARM::WinEH::ReturnType::RT_BW: 85 OS << "b.w target"; 86 break; 87 case ARM::WinEH::ReturnType::RT_NoEpilogue: 88 OS << "(no epilogue)"; 89 break; 90 } 91 return OS; 92 } 93 } 94 95 static std::string formatSymbol(StringRef Name, uint64_t Address, 96 uint64_t Offset = 0) { 97 std::string Buffer; 98 raw_string_ostream OS(Buffer); 99 100 if (!Name.empty()) 101 OS << Name << " "; 102 103 if (Offset) 104 OS << format("+0x%X (0x%" PRIX64 ")", Offset, Address); 105 else if (!Name.empty()) 106 OS << format("(0x%" PRIX64 ")", Address); 107 else 108 OS << format("0x%" PRIX64, Address); 109 110 return OS.str(); 111 } 112 113 namespace llvm { 114 namespace ARM { 115 namespace WinEH { 116 const size_t Decoder::PDataEntrySize = sizeof(RuntimeFunction); 117 118 // TODO name the uops more appropriately 119 const Decoder::RingEntry Decoder::Ring[] = { 120 { 0x80, 0x00, 1, &Decoder::opcode_0xxxxxxx }, // UOP_STACK_FREE (16-bit) 121 { 0xc0, 0x80, 2, &Decoder::opcode_10Lxxxxx }, // UOP_POP (32-bit) 122 { 0xf0, 0xc0, 1, &Decoder::opcode_1100xxxx }, // UOP_STACK_SAVE (16-bit) 123 { 0xf8, 0xd0, 1, &Decoder::opcode_11010Lxx }, // UOP_POP (16-bit) 124 { 0xf8, 0xd8, 1, &Decoder::opcode_11011Lxx }, // UOP_POP (32-bit) 125 { 0xf8, 0xe0, 1, &Decoder::opcode_11100xxx }, // UOP_VPOP (32-bit) 126 { 0xfc, 0xe8, 2, &Decoder::opcode_111010xx }, // UOP_STACK_FREE (32-bit) 127 { 0xfe, 0xec, 2, &Decoder::opcode_1110110L }, // UOP_POP (16-bit) 128 { 0xff, 0xee, 2, &Decoder::opcode_11101110 }, // UOP_MICROSOFT_SPECIFIC (16-bit) 129 // UOP_PUSH_MACHINE_FRAME 130 // UOP_PUSH_CONTEXT 131 // UOP_PUSH_TRAP_FRAME 132 // UOP_REDZONE_RESTORE_LR 133 { 0xff, 0xef, 2, &Decoder::opcode_11101111 }, // UOP_LDRPC_POSTINC (32-bit) 134 { 0xff, 0xf5, 2, &Decoder::opcode_11110101 }, // UOP_VPOP (32-bit) 135 { 0xff, 0xf6, 2, &Decoder::opcode_11110110 }, // UOP_VPOP (32-bit) 136 { 0xff, 0xf7, 3, &Decoder::opcode_11110111 }, // UOP_STACK_RESTORE (16-bit) 137 { 0xff, 0xf8, 4, &Decoder::opcode_11111000 }, // UOP_STACK_RESTORE (16-bit) 138 { 0xff, 0xf9, 3, &Decoder::opcode_11111001 }, // UOP_STACK_RESTORE (32-bit) 139 { 0xff, 0xfa, 4, &Decoder::opcode_11111010 }, // UOP_STACK_RESTORE (32-bit) 140 { 0xff, 0xfb, 1, &Decoder::opcode_11111011 }, // UOP_NOP (16-bit) 141 { 0xff, 0xfc, 1, &Decoder::opcode_11111100 }, // UOP_NOP (32-bit) 142 { 0xff, 0xfd, 1, &Decoder::opcode_11111101 }, // UOP_NOP (16-bit) / END 143 { 0xff, 0xfe, 1, &Decoder::opcode_11111110 }, // UOP_NOP (32-bit) / END 144 { 0xff, 0xff, 1, &Decoder::opcode_11111111 }, // UOP_END 145 }; 146 147 148 // Unwind opcodes for ARM64. 149 // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling 150 const Decoder::RingEntry Decoder::Ring64[] = { 151 { 0xe0, 0x00, 1, &Decoder::opcode_alloc_s }, 152 { 0xe0, 0x20, 1, &Decoder::opcode_save_r19r20_x }, 153 { 0xc0, 0x40, 1, &Decoder::opcode_save_fplr }, 154 { 0xc0, 0x80, 1, &Decoder::opcode_save_fplr_x }, 155 { 0xf8, 0xc0, 2, &Decoder::opcode_alloc_m }, 156 { 0xfc, 0xc8, 2, &Decoder::opcode_save_regp }, 157 { 0xfc, 0xcc, 2, &Decoder::opcode_save_regp_x }, 158 { 0xfc, 0xd0, 2, &Decoder::opcode_save_reg }, 159 { 0xfe, 0xd4, 2, &Decoder::opcode_save_reg_x }, 160 { 0xfe, 0xd6, 2, &Decoder::opcode_save_lrpair }, 161 { 0xfe, 0xd8, 2, &Decoder::opcode_save_fregp }, 162 { 0xfe, 0xda, 2, &Decoder::opcode_save_fregp_x }, 163 { 0xfe, 0xdc, 2, &Decoder::opcode_save_freg }, 164 { 0xff, 0xde, 2, &Decoder::opcode_save_freg_x }, 165 { 0xff, 0xe0, 4, &Decoder::opcode_alloc_l }, 166 { 0xff, 0xe1, 1, &Decoder::opcode_setfp }, 167 { 0xff, 0xe2, 2, &Decoder::opcode_addfp }, 168 { 0xff, 0xe3, 1, &Decoder::opcode_nop }, 169 { 0xff, 0xe4, 1, &Decoder::opcode_end }, 170 { 0xff, 0xe5, 1, &Decoder::opcode_end_c }, 171 }; 172 173 void Decoder::printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask) { 174 static const char * const GPRRegisterNames[16] = { 175 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", 176 "r11", "ip", "sp", "lr", "pc", 177 }; 178 179 const uint16_t GPRMask = std::get<0>(RegisterMask); 180 const uint16_t VFPMask = std::get<1>(RegisterMask); 181 182 OS << '{'; 183 bool Comma = false; 184 for (unsigned RI = 0, RE = 11; RI < RE; ++RI) { 185 if (GPRMask & (1 << RI)) { 186 if (Comma) 187 OS << ", "; 188 OS << GPRRegisterNames[RI]; 189 Comma = true; 190 } 191 } 192 for (unsigned RI = 0, RE = 32; RI < RE; ++RI) { 193 if (VFPMask & (1 << RI)) { 194 if (Comma) 195 OS << ", "; 196 OS << "d" << unsigned(RI); 197 Comma = true; 198 } 199 } 200 for (unsigned RI = 11, RE = 16; RI < RE; ++RI) { 201 if (GPRMask & (1 << RI)) { 202 if (Comma) 203 OS << ", "; 204 OS << GPRRegisterNames[RI]; 205 Comma = true; 206 } 207 } 208 OS << '}'; 209 } 210 211 ErrorOr<object::SectionRef> 212 Decoder::getSectionContaining(const COFFObjectFile &COFF, uint64_t VA) { 213 for (const auto &Section : COFF.sections()) { 214 uint64_t Address = Section.getAddress(); 215 uint64_t Size = Section.getSize(); 216 217 if (VA >= Address && (VA - Address) <= Size) 218 return Section; 219 } 220 return readobj_error::unknown_symbol; 221 } 222 223 ErrorOr<object::SymbolRef> Decoder::getSymbol(const COFFObjectFile &COFF, 224 uint64_t VA, bool FunctionOnly) { 225 for (const auto &Symbol : COFF.symbols()) { 226 Expected<SymbolRef::Type> Type = Symbol.getType(); 227 if (!Type) 228 return errorToErrorCode(Type.takeError()); 229 if (FunctionOnly && *Type != SymbolRef::ST_Function) 230 continue; 231 232 Expected<uint64_t> Address = Symbol.getAddress(); 233 if (!Address) 234 return errorToErrorCode(Address.takeError()); 235 if (*Address == VA) 236 return Symbol; 237 } 238 return readobj_error::unknown_symbol; 239 } 240 241 ErrorOr<SymbolRef> Decoder::getRelocatedSymbol(const COFFObjectFile &, 242 const SectionRef &Section, 243 uint64_t Offset) { 244 for (const auto &Relocation : Section.relocations()) { 245 uint64_t RelocationOffset = Relocation.getOffset(); 246 if (RelocationOffset == Offset) 247 return *Relocation.getSymbol(); 248 } 249 return readobj_error::unknown_symbol; 250 } 251 252 bool Decoder::opcode_0xxxxxxx(const uint8_t *OC, unsigned &Offset, 253 unsigned Length, bool Prologue) { 254 uint8_t Imm = OC[Offset] & 0x7f; 255 SW.startLine() << format("0x%02x ; %s sp, #(%u * 4)\n", 256 OC[Offset], 257 static_cast<const char *>(Prologue ? "sub" : "add"), 258 Imm); 259 ++Offset; 260 return false; 261 } 262 263 bool Decoder::opcode_10Lxxxxx(const uint8_t *OC, unsigned &Offset, 264 unsigned Length, bool Prologue) { 265 unsigned Link = (OC[Offset] & 0x20) >> 5; 266 uint16_t RegisterMask = (Link << (Prologue ? 14 : 15)) 267 | ((OC[Offset + 0] & 0x1f) << 8) 268 | ((OC[Offset + 1] & 0xff) << 0); 269 assert((~RegisterMask & (1 << 13)) && "sp must not be set"); 270 assert((~RegisterMask & (1 << (Prologue ? 15 : 14))) && "pc must not be set"); 271 272 SW.startLine() << format("0x%02x 0x%02x ; %s.w ", 273 OC[Offset + 0], OC[Offset + 1], 274 Prologue ? "push" : "pop"); 275 printRegisters(std::make_pair(RegisterMask, 0)); 276 OS << '\n'; 277 278 Offset += 2; 279 return false; 280 } 281 282 bool Decoder::opcode_1100xxxx(const uint8_t *OC, unsigned &Offset, 283 unsigned Length, bool Prologue) { 284 if (Prologue) 285 SW.startLine() << format("0x%02x ; mov r%u, sp\n", 286 OC[Offset], OC[Offset] & 0xf); 287 else 288 SW.startLine() << format("0x%02x ; mov sp, r%u\n", 289 OC[Offset], OC[Offset] & 0xf); 290 ++Offset; 291 return false; 292 } 293 294 bool Decoder::opcode_11010Lxx(const uint8_t *OC, unsigned &Offset, 295 unsigned Length, bool Prologue) { 296 unsigned Link = (OC[Offset] & 0x4) >> 3; 297 unsigned Count = (OC[Offset] & 0x3); 298 299 uint16_t GPRMask = (Link << (Prologue ? 14 : 15)) 300 | (((1 << (Count + 1)) - 1) << 4); 301 302 SW.startLine() << format("0x%02x ; %s ", OC[Offset], 303 Prologue ? "push" : "pop"); 304 printRegisters(std::make_pair(GPRMask, 0)); 305 OS << '\n'; 306 307 ++Offset; 308 return false; 309 } 310 311 bool Decoder::opcode_11011Lxx(const uint8_t *OC, unsigned &Offset, 312 unsigned Length, bool Prologue) { 313 unsigned Link = (OC[Offset] & 0x4) >> 2; 314 unsigned Count = (OC[Offset] & 0x3) + 4; 315 316 uint16_t GPRMask = (Link << (Prologue ? 14 : 15)) 317 | (((1 << (Count + 1)) - 1) << 4); 318 319 SW.startLine() << format("0x%02x ; %s.w ", OC[Offset], 320 Prologue ? "push" : "pop"); 321 printRegisters(std::make_pair(GPRMask, 0)); 322 OS << '\n'; 323 324 ++Offset; 325 return false; 326 } 327 328 bool Decoder::opcode_11100xxx(const uint8_t *OC, unsigned &Offset, 329 unsigned Length, bool Prologue) { 330 unsigned High = (OC[Offset] & 0x7); 331 uint32_t VFPMask = (((1 << (High + 1)) - 1) << 8); 332 333 SW.startLine() << format("0x%02x ; %s ", OC[Offset], 334 Prologue ? "vpush" : "vpop"); 335 printRegisters(std::make_pair(0, VFPMask)); 336 OS << '\n'; 337 338 ++Offset; 339 return false; 340 } 341 342 bool Decoder::opcode_111010xx(const uint8_t *OC, unsigned &Offset, 343 unsigned Length, bool Prologue) { 344 uint16_t Imm = ((OC[Offset + 0] & 0x03) << 8) | ((OC[Offset + 1] & 0xff) << 0); 345 346 SW.startLine() << format("0x%02x 0x%02x ; %s.w sp, #(%u * 4)\n", 347 OC[Offset + 0], OC[Offset + 1], 348 static_cast<const char *>(Prologue ? "sub" : "add"), 349 Imm); 350 351 Offset += 2; 352 return false; 353 } 354 355 bool Decoder::opcode_1110110L(const uint8_t *OC, unsigned &Offset, 356 unsigned Length, bool Prologue) { 357 uint8_t GPRMask = ((OC[Offset + 0] & 0x01) << (Prologue ? 14 : 15)) 358 | ((OC[Offset + 1] & 0xff) << 0); 359 360 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0], 361 OC[Offset + 1], Prologue ? "push" : "pop"); 362 printRegisters(std::make_pair(GPRMask, 0)); 363 OS << '\n'; 364 365 Offset += 2; 366 return false; 367 } 368 369 bool Decoder::opcode_11101110(const uint8_t *OC, unsigned &Offset, 370 unsigned Length, bool Prologue) { 371 assert(!Prologue && "may not be used in prologue"); 372 373 if (OC[Offset + 1] & 0xf0) 374 SW.startLine() << format("0x%02x 0x%02x ; reserved\n", 375 OC[Offset + 0], OC[Offset + 1]); 376 else 377 SW.startLine() 378 << format("0x%02x 0x%02x ; microsoft-specific (type: %u)\n", 379 OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] & 0x0f); 380 381 Offset += 2; 382 return false; 383 } 384 385 bool Decoder::opcode_11101111(const uint8_t *OC, unsigned &Offset, 386 unsigned Length, bool Prologue) { 387 assert(!Prologue && "may not be used in prologue"); 388 389 if (OC[Offset + 1] & 0xf0) 390 SW.startLine() << format("0x%02x 0x%02x ; reserved\n", 391 OC[Offset + 0], OC[Offset + 1]); 392 else 393 SW.startLine() 394 << format("0x%02x 0x%02x ; ldr.w lr, [sp], #%u\n", 395 OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] << 2); 396 397 Offset += 2; 398 return false; 399 } 400 401 bool Decoder::opcode_11110101(const uint8_t *OC, unsigned &Offset, 402 unsigned Length, bool Prologue) { 403 unsigned Start = (OC[Offset + 1] & 0xf0) >> 4; 404 unsigned End = (OC[Offset + 1] & 0x0f) >> 0; 405 uint32_t VFPMask = ((1 << (End - Start)) - 1) << Start; 406 407 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0], 408 OC[Offset + 1], Prologue ? "vpush" : "vpop"); 409 printRegisters(std::make_pair(0, VFPMask)); 410 OS << '\n'; 411 412 Offset += 2; 413 return false; 414 } 415 416 bool Decoder::opcode_11110110(const uint8_t *OC, unsigned &Offset, 417 unsigned Length, bool Prologue) { 418 unsigned Start = (OC[Offset + 1] & 0xf0) >> 4; 419 unsigned End = (OC[Offset + 1] & 0x0f) >> 0; 420 uint32_t VFPMask = ((1 << (End - Start)) - 1) << 16; 421 422 SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0], 423 OC[Offset + 1], Prologue ? "vpush" : "vpop"); 424 printRegisters(std::make_pair(0, VFPMask)); 425 OS << '\n'; 426 427 Offset += 2; 428 return false; 429 } 430 431 bool Decoder::opcode_11110111(const uint8_t *OC, unsigned &Offset, 432 unsigned Length, bool Prologue) { 433 uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0); 434 435 SW.startLine() << format("0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n", 436 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], 437 static_cast<const char *>(Prologue ? "sub" : "add"), 438 Imm); 439 440 Offset += 3; 441 return false; 442 } 443 444 bool Decoder::opcode_11111000(const uint8_t *OC, unsigned &Offset, 445 unsigned Length, bool Prologue) { 446 uint32_t Imm = (OC[Offset + 1] << 16) 447 | (OC[Offset + 2] << 8) 448 | (OC[Offset + 3] << 0); 449 450 SW.startLine() 451 << format("0x%02x 0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n", 452 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3], 453 static_cast<const char *>(Prologue ? "sub" : "add"), Imm); 454 455 Offset += 4; 456 return false; 457 } 458 459 bool Decoder::opcode_11111001(const uint8_t *OC, unsigned &Offset, 460 unsigned Length, bool Prologue) { 461 uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0); 462 463 SW.startLine() 464 << format("0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n", 465 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], 466 static_cast<const char *>(Prologue ? "sub" : "add"), Imm); 467 468 Offset += 3; 469 return false; 470 } 471 472 bool Decoder::opcode_11111010(const uint8_t *OC, unsigned &Offset, 473 unsigned Length, bool Prologue) { 474 uint32_t Imm = (OC[Offset + 1] << 16) 475 | (OC[Offset + 2] << 8) 476 | (OC[Offset + 3] << 0); 477 478 SW.startLine() 479 << format("0x%02x 0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n", 480 OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3], 481 static_cast<const char *>(Prologue ? "sub" : "add"), Imm); 482 483 Offset += 4; 484 return false; 485 } 486 487 bool Decoder::opcode_11111011(const uint8_t *OC, unsigned &Offset, 488 unsigned Length, bool Prologue) { 489 SW.startLine() << format("0x%02x ; nop\n", OC[Offset]); 490 ++Offset; 491 return false; 492 } 493 494 bool Decoder::opcode_11111100(const uint8_t *OC, unsigned &Offset, 495 unsigned Length, bool Prologue) { 496 SW.startLine() << format("0x%02x ; nop.w\n", OC[Offset]); 497 ++Offset; 498 return false; 499 } 500 501 bool Decoder::opcode_11111101(const uint8_t *OC, unsigned &Offset, 502 unsigned Length, bool Prologue) { 503 SW.startLine() << format("0x%02x ; b\n", OC[Offset]); 504 ++Offset; 505 return true; 506 } 507 508 bool Decoder::opcode_11111110(const uint8_t *OC, unsigned &Offset, 509 unsigned Length, bool Prologue) { 510 SW.startLine() << format("0x%02x ; b.w\n", OC[Offset]); 511 ++Offset; 512 return true; 513 } 514 515 bool Decoder::opcode_11111111(const uint8_t *OC, unsigned &Offset, 516 unsigned Length, bool Prologue) { 517 ++Offset; 518 return true; 519 } 520 521 // ARM64 unwind codes start here. 522 bool Decoder::opcode_alloc_s(const uint8_t *OC, unsigned &Offset, 523 unsigned Length, bool Prologue) { 524 uint32_t NumBytes = (OC[Offset] & 0x1F) << 4; 525 SW.startLine() << format("0x%02x ; %s sp, #%u\n", OC[Offset], 526 static_cast<const char *>(Prologue ? "sub" : "add"), 527 NumBytes); 528 ++Offset; 529 return false; 530 } 531 532 bool Decoder::opcode_save_r19r20_x(const uint8_t *OC, unsigned &Offset, 533 unsigned Length, bool Prologue) { 534 uint32_t Off = (OC[Offset] & 0x1F) << 3; 535 if (Prologue) 536 SW.startLine() << format( 537 "0x%02x ; stp x19, x20, [sp, #-%u]!\n", OC[Offset], Off); 538 else 539 SW.startLine() << format( 540 "0x%02x ; ldp x19, x20, [sp], #%u\n", OC[Offset], Off); 541 ++Offset; 542 return false; 543 } 544 545 bool Decoder::opcode_save_fplr(const uint8_t *OC, unsigned &Offset, 546 unsigned Length, bool Prologue) { 547 uint32_t Off = (OC[Offset] & 0x3F) << 3; 548 SW.startLine() << format( 549 "0x%02x ; %s x29, x30, [sp, #%u]\n", OC[Offset], 550 static_cast<const char *>(Prologue ? "stp" : "ldp"), Off); 551 ++Offset; 552 return false; 553 } 554 555 bool Decoder::opcode_save_fplr_x(const uint8_t *OC, unsigned &Offset, 556 unsigned Length, bool Prologue) { 557 uint32_t Off = ((OC[Offset] & 0x3F) + 1) << 3; 558 if (Prologue) 559 SW.startLine() << format( 560 "0x%02x ; stp x29, x30, [sp, #-%u]!\n", OC[Offset], Off); 561 else 562 SW.startLine() << format( 563 "0x%02x ; ldp x29, x30, [sp], #%u\n", OC[Offset], Off); 564 ++Offset; 565 return false; 566 } 567 568 bool Decoder::opcode_alloc_m(const uint8_t *OC, unsigned &Offset, 569 unsigned Length, bool Prologue) { 570 uint32_t NumBytes = ((OC[Offset] & 0x07) << 8); 571 NumBytes |= (OC[Offset + 1] & 0xFF); 572 NumBytes <<= 4; 573 SW.startLine() << format("0x%02x%02x ; %s sp, #%u\n", 574 OC[Offset], OC[Offset + 1], 575 static_cast<const char *>(Prologue ? "sub" : "add"), 576 NumBytes); 577 Offset += 2; 578 return false; 579 } 580 581 bool Decoder::opcode_save_regp(const uint8_t *OC, unsigned &Offset, 582 unsigned Length, bool Prologue) { 583 uint32_t Reg = ((OC[Offset] & 0x03) << 8); 584 Reg |= (OC[Offset + 1] & 0xC0); 585 Reg >>= 6; 586 Reg += 19; 587 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3; 588 SW.startLine() << format( 589 "0x%02x%02x ; %s x%u, x%u, [sp, #%u]\n", 590 OC[Offset], OC[Offset + 1], 591 static_cast<const char *>(Prologue ? "stp" : "ldp"), Reg, Reg + 1, Off); 592 Offset += 2; 593 return false; 594 } 595 596 bool Decoder::opcode_save_regp_x(const uint8_t *OC, unsigned &Offset, 597 unsigned Length, bool Prologue) { 598 uint32_t Reg = ((OC[Offset] & 0x03) << 8); 599 Reg |= (OC[Offset + 1] & 0xC0); 600 Reg >>= 6; 601 Reg += 19; 602 uint32_t Off = ((OC[Offset + 1] & 0x3F) + 1) << 3; 603 if (Prologue) 604 SW.startLine() << format( 605 "0x%02x%02x ; stp x%u, x%u, [sp, #-%u]!\n", 606 OC[Offset], OC[Offset + 1], Reg, 607 Reg + 1, Off); 608 else 609 SW.startLine() << format( 610 "0x%02x%02x ; ldp x%u, x%u, [sp], #%u\n", 611 OC[Offset], OC[Offset + 1], Reg, 612 Reg + 1, Off); 613 Offset += 2; 614 return false; 615 } 616 617 bool Decoder::opcode_save_reg(const uint8_t *OC, unsigned &Offset, 618 unsigned Length, bool Prologue) { 619 uint32_t Reg = (OC[Offset] & 0x03) << 8; 620 Reg |= (OC[Offset + 1] & 0xC0); 621 Reg >>= 6; 622 Reg += 19; 623 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3; 624 SW.startLine() << format("0x%02x%02x ; %s x%u, [sp, #%u]\n", 625 OC[Offset], OC[Offset + 1], 626 static_cast<const char *>(Prologue ? "str" : "ldr"), 627 Reg, Off); 628 Offset += 2; 629 return false; 630 } 631 632 bool Decoder::opcode_save_reg_x(const uint8_t *OC, unsigned &Offset, 633 unsigned Length, bool Prologue) { 634 uint32_t Reg = (OC[Offset] & 0x01) << 8; 635 Reg |= (OC[Offset + 1] & 0xE0); 636 Reg >>= 5; 637 Reg += 19; 638 uint32_t Off = ((OC[Offset + 1] & 0x1F) + 1) << 3; 639 if (Prologue) 640 SW.startLine() << format("0x%02x%02x ; str x%u, [sp, #%u]!\n", 641 OC[Offset], OC[Offset + 1], Reg, Off); 642 else 643 SW.startLine() << format("0x%02x%02x ; ldr x%u, [sp], #%u\n", 644 OC[Offset], OC[Offset + 1], Reg, Off); 645 Offset += 2; 646 return false; 647 } 648 649 bool Decoder::opcode_save_lrpair(const uint8_t *OC, unsigned &Offset, 650 unsigned Length, bool Prologue) { 651 uint32_t Reg = (OC[Offset] & 0x01) << 8; 652 Reg |= (OC[Offset + 1] & 0xC0); 653 Reg >>= 6; 654 Reg *= 2; 655 Reg += 19; 656 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3; 657 SW.startLine() << format("0x%02x%02x ; %s x%u, lr, [sp, #%u]\n", 658 OC[Offset], OC[Offset + 1], 659 static_cast<const char *>(Prologue ? "stp" : "ldp"), 660 Reg, Off); 661 Offset += 2; 662 return false; 663 } 664 665 bool Decoder::opcode_save_fregp(const uint8_t *OC, unsigned &Offset, 666 unsigned Length, bool Prologue) { 667 uint32_t Reg = (OC[Offset] & 0x01) << 8; 668 Reg |= (OC[Offset + 1] & 0xC0); 669 Reg >>= 6; 670 Reg += 8; 671 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3; 672 SW.startLine() << format("0x%02x%02x ; %s d%u, d%u, [sp, #%u]\n", 673 OC[Offset], OC[Offset + 1], 674 static_cast<const char *>(Prologue ? "stp" : "ldp"), 675 Reg, Reg + 1, Off); 676 Offset += 2; 677 return false; 678 } 679 680 bool Decoder::opcode_save_fregp_x(const uint8_t *OC, unsigned &Offset, 681 unsigned Length, bool Prologue) { 682 uint32_t Reg = (OC[Offset] & 0x01) << 8; 683 Reg |= (OC[Offset + 1] & 0xC0); 684 Reg >>= 6; 685 Reg += 8; 686 uint32_t Off = ((OC[Offset + 1] & 0x3F) + 1) << 3; 687 if (Prologue) 688 SW.startLine() << format( 689 "0x%02x%02x ; stp d%u, d%u, [sp, #-%u]!\n", OC[Offset], 690 OC[Offset + 1], Reg, Reg + 1, Off); 691 else 692 SW.startLine() << format( 693 "0x%02x%02x ; ldp d%u, d%u, [sp], #%u\n", OC[Offset], 694 OC[Offset + 1], Reg, Reg + 1, Off); 695 Offset += 2; 696 return false; 697 } 698 699 bool Decoder::opcode_save_freg(const uint8_t *OC, unsigned &Offset, 700 unsigned Length, bool Prologue) { 701 uint32_t Reg = (OC[Offset] & 0x01) << 8; 702 Reg |= (OC[Offset + 1] & 0xC0); 703 Reg >>= 6; 704 Reg += 8; 705 uint32_t Off = (OC[Offset + 1] & 0x3F) << 3; 706 SW.startLine() << format("0x%02x%02x ; %s d%u, [sp, #%u]\n", 707 OC[Offset], OC[Offset + 1], 708 static_cast<const char *>(Prologue ? "str" : "ldr"), 709 Reg, Off); 710 Offset += 2; 711 return false; 712 } 713 714 bool Decoder::opcode_save_freg_x(const uint8_t *OC, unsigned &Offset, 715 unsigned Length, bool Prologue) { 716 uint32_t Reg = ((OC[Offset + 1] & 0xE0) >> 5) + 8; 717 uint32_t Off = ((OC[Offset + 1] & 0x1F) + 1) << 3; 718 if (Prologue) 719 SW.startLine() << format( 720 "0x%02x%02x ; str d%u, [sp, #-%u]!\n", OC[Offset], 721 OC[Offset + 1], Reg, Off); 722 else 723 SW.startLine() << format( 724 "0x%02x%02x ; ldr d%u, [sp], #%u\n", OC[Offset], 725 OC[Offset + 1], Reg, Off); 726 Offset += 2; 727 return false; 728 } 729 730 bool Decoder::opcode_alloc_l(const uint8_t *OC, unsigned &Offset, 731 unsigned Length, bool Prologue) { 732 unsigned Off = 733 (OC[Offset + 1] << 16) | (OC[Offset + 2] << 8) | (OC[Offset + 3] << 0); 734 Off <<= 4; 735 SW.startLine() << format( 736 "0x%02x%02x%02x%02x ; %s sp, #%u\n", OC[Offset], OC[Offset + 1], 737 OC[Offset + 2], OC[Offset + 3], 738 static_cast<const char *>(Prologue ? "sub" : "add"), Off); 739 Offset += 4; 740 return false; 741 } 742 743 bool Decoder::opcode_setfp(const uint8_t *OC, unsigned &Offset, unsigned Length, 744 bool Prologue) { 745 SW.startLine() << format("0x%02x ; mov fp, sp\n", OC[Offset]); 746 ++Offset; 747 return false; 748 } 749 750 bool Decoder::opcode_addfp(const uint8_t *OC, unsigned &Offset, unsigned Length, 751 bool Prologue) { 752 unsigned NumBytes = OC[Offset + 1] << 3; 753 SW.startLine() << format("0x%02x%02x ; add fp, sp, #%u\n", 754 OC[Offset], OC[Offset + 1], NumBytes); 755 Offset += 2; 756 return false; 757 } 758 759 bool Decoder::opcode_nop(const uint8_t *OC, unsigned &Offset, unsigned Length, 760 bool Prologue) { 761 SW.startLine() << format("0x%02x ; nop\n", OC[Offset]); 762 ++Offset; 763 return false; 764 } 765 766 bool Decoder::opcode_end(const uint8_t *OC, unsigned &Offset, unsigned Length, 767 bool Prologue) { 768 SW.startLine() << format("0x%02x ; end\n", OC[Offset]); 769 ++Offset; 770 return true; 771 } 772 773 bool Decoder::opcode_end_c(const uint8_t *OC, unsigned &Offset, unsigned Length, 774 bool Prologue) { 775 SW.startLine() << format("0x%02x ; end_c\n", OC[Offset]); 776 ++Offset; 777 return true; 778 } 779 780 void Decoder::decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset, 781 bool Prologue) { 782 assert((!Prologue || Offset == 0) && "prologue should always use offset 0"); 783 const RingEntry* DecodeRing = isAArch64 ? Ring64 : Ring; 784 bool Terminated = false; 785 for (unsigned OI = Offset, OE = Opcodes.size(); !Terminated && OI < OE; ) { 786 for (unsigned DI = 0;; ++DI) { 787 if ((isAArch64 && (DI >= array_lengthof(Ring64))) || 788 (!isAArch64 && (DI >= array_lengthof(Ring)))) { 789 SW.startLine() << format("0x%02x ; Bad opcode!\n", 790 Opcodes.data()[OI]); 791 ++OI; 792 break; 793 } 794 795 if ((Opcodes[OI] & DecodeRing[DI].Mask) == DecodeRing[DI].Value) { 796 if (OI + DecodeRing[DI].Length > OE) { 797 SW.startLine() << format("Opcode 0x%02x goes past the unwind data\n", 798 Opcodes[OI]); 799 OI += DecodeRing[DI].Length; 800 break; 801 } 802 Terminated = 803 (this->*DecodeRing[DI].Routine)(Opcodes.data(), OI, 0, Prologue); 804 break; 805 } 806 } 807 } 808 } 809 810 bool Decoder::dumpXDataRecord(const COFFObjectFile &COFF, 811 const SectionRef &Section, 812 uint64_t FunctionAddress, uint64_t VA) { 813 ArrayRef<uint8_t> Contents; 814 if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents)) 815 return false; 816 817 uint64_t SectionVA = Section.getAddress(); 818 uint64_t Offset = VA - SectionVA; 819 const ulittle32_t *Data = 820 reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset); 821 822 // Sanity check to ensure that the .xdata header is present. 823 // A header is one or two words, followed by at least one word to describe 824 // the unwind codes. Applicable to both ARM and AArch64. 825 if (Contents.size() - Offset < 8) 826 report_fatal_error(".xdata must be at least 8 bytes in size"); 827 828 const ExceptionDataRecord XData(Data, isAArch64); 829 DictScope XRS(SW, "ExceptionData"); 830 SW.printNumber("FunctionLength", 831 isAArch64 ? XData.FunctionLengthInBytesAArch64() : 832 XData.FunctionLengthInBytesARM()); 833 SW.printNumber("Version", XData.Vers()); 834 SW.printBoolean("ExceptionData", XData.X()); 835 SW.printBoolean("EpiloguePacked", XData.E()); 836 if (!isAArch64) 837 SW.printBoolean("Fragment", XData.F()); 838 SW.printNumber(XData.E() ? "EpilogueOffset" : "EpilogueScopes", 839 XData.EpilogueCount()); 840 uint64_t ByteCodeLength = XData.CodeWords() * sizeof(uint32_t); 841 SW.printNumber("ByteCodeLength", ByteCodeLength); 842 843 if ((int64_t)(Contents.size() - Offset - 4 * HeaderWords(XData) - 844 (XData.E() ? 0 : XData.EpilogueCount() * 4) - 845 (XData.X() ? 8 : 0)) < (int64_t)ByteCodeLength) 846 report_fatal_error("Malformed unwind data"); 847 848 if (XData.E()) { 849 ArrayRef<uint8_t> UC = XData.UnwindByteCode(); 850 if (isAArch64 || !XData.F()) { 851 ListScope PS(SW, "Prologue"); 852 decodeOpcodes(UC, 0, /*Prologue=*/true); 853 } 854 if (XData.EpilogueCount()) { 855 ListScope ES(SW, "Epilogue"); 856 decodeOpcodes(UC, XData.EpilogueCount(), /*Prologue=*/false); 857 } 858 } else { 859 { 860 ListScope PS(SW, "Prologue"); 861 decodeOpcodes(XData.UnwindByteCode(), 0, /*Prologue=*/true); 862 } 863 ArrayRef<ulittle32_t> EpilogueScopes = XData.EpilogueScopes(); 864 ListScope ESS(SW, "EpilogueScopes"); 865 for (const EpilogueScope ES : EpilogueScopes) { 866 DictScope ESES(SW, "EpilogueScope"); 867 SW.printNumber("StartOffset", ES.EpilogueStartOffset()); 868 if (!isAArch64) 869 SW.printNumber("Condition", ES.Condition()); 870 SW.printNumber("EpilogueStartIndex", 871 isAArch64 ? ES.EpilogueStartIndexAArch64() 872 : ES.EpilogueStartIndexARM()); 873 if (ES.ES & ~0xffc3ffff) 874 SW.printNumber("ReservedBits", (ES.ES >> 18) & 0xF); 875 876 ListScope Opcodes(SW, "Opcodes"); 877 decodeOpcodes(XData.UnwindByteCode(), 878 isAArch64 ? ES.EpilogueStartIndexAArch64() 879 : ES.EpilogueStartIndexARM(), 880 /*Prologue=*/false); 881 } 882 } 883 884 if (XData.X()) { 885 const uint32_t Address = XData.ExceptionHandlerRVA(); 886 const uint32_t Parameter = XData.ExceptionHandlerParameter(); 887 const size_t HandlerOffset = HeaderWords(XData) 888 + (XData.E() ? 0 : XData.EpilogueCount()) 889 + XData.CodeWords(); 890 891 ErrorOr<SymbolRef> Symbol = getRelocatedSymbol( 892 COFF, Section, Offset + HandlerOffset * sizeof(uint32_t)); 893 if (!Symbol) 894 Symbol = getSymbol(COFF, Address, /*FunctionOnly=*/true); 895 if (!Symbol) { 896 ListScope EHS(SW, "ExceptionHandler"); 897 SW.printString("Routine", "(null)"); 898 return true; 899 } 900 901 Expected<StringRef> Name = Symbol->getName(); 902 if (!Name) { 903 std::string Buf; 904 llvm::raw_string_ostream OS(Buf); 905 logAllUnhandledErrors(Name.takeError(), OS); 906 OS.flush(); 907 report_fatal_error(Buf); 908 } 909 910 ListScope EHS(SW, "ExceptionHandler"); 911 SW.printString("Routine", formatSymbol(*Name, Address)); 912 SW.printHex("Parameter", Parameter); 913 } 914 915 return true; 916 } 917 918 bool Decoder::dumpUnpackedEntry(const COFFObjectFile &COFF, 919 const SectionRef Section, uint64_t Offset, 920 unsigned Index, const RuntimeFunction &RF) { 921 assert(RF.Flag() == RuntimeFunctionFlag::RFF_Unpacked && 922 "packed entry cannot be treated as an unpacked entry"); 923 924 ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset); 925 if (!Function) 926 Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true); 927 928 ErrorOr<SymbolRef> XDataRecord = getRelocatedSymbol(COFF, Section, Offset + 4); 929 if (!XDataRecord) 930 XDataRecord = getSymbol(COFF, RF.ExceptionInformationRVA()); 931 932 if (!RF.BeginAddress && !Function) 933 return false; 934 if (!RF.UnwindData && !XDataRecord) 935 return false; 936 937 StringRef FunctionName; 938 uint64_t FunctionAddress; 939 if (Function) { 940 Expected<StringRef> FunctionNameOrErr = Function->getName(); 941 if (!FunctionNameOrErr) { 942 std::string Buf; 943 llvm::raw_string_ostream OS(Buf); 944 logAllUnhandledErrors(FunctionNameOrErr.takeError(), OS); 945 OS.flush(); 946 report_fatal_error(Buf); 947 } 948 FunctionName = *FunctionNameOrErr; 949 Expected<uint64_t> FunctionAddressOrErr = Function->getAddress(); 950 if (!FunctionAddressOrErr) { 951 std::string Buf; 952 llvm::raw_string_ostream OS(Buf); 953 logAllUnhandledErrors(FunctionAddressOrErr.takeError(), OS); 954 OS.flush(); 955 report_fatal_error(Buf); 956 } 957 FunctionAddress = *FunctionAddressOrErr; 958 } else { 959 FunctionAddress = COFF.getImageBase() + RF.BeginAddress; 960 } 961 962 SW.printString("Function", formatSymbol(FunctionName, FunctionAddress)); 963 964 if (XDataRecord) { 965 Expected<StringRef> Name = XDataRecord->getName(); 966 if (!Name) { 967 std::string Buf; 968 llvm::raw_string_ostream OS(Buf); 969 logAllUnhandledErrors(Name.takeError(), OS); 970 OS.flush(); 971 report_fatal_error(Buf); 972 } 973 974 Expected<uint64_t> AddressOrErr = XDataRecord->getAddress(); 975 if (!AddressOrErr) { 976 std::string Buf; 977 llvm::raw_string_ostream OS(Buf); 978 logAllUnhandledErrors(AddressOrErr.takeError(), OS); 979 OS.flush(); 980 report_fatal_error(Buf); 981 } 982 uint64_t Address = *AddressOrErr; 983 984 SW.printString("ExceptionRecord", formatSymbol(*Name, Address)); 985 986 Expected<section_iterator> SIOrErr = XDataRecord->getSection(); 987 if (!SIOrErr) { 988 // TODO: Actually report errors helpfully. 989 consumeError(SIOrErr.takeError()); 990 return false; 991 } 992 section_iterator SI = *SIOrErr; 993 994 // FIXME: Do we need to add an offset from the relocation? 995 return dumpXDataRecord(COFF, *SI, FunctionAddress, 996 RF.ExceptionInformationRVA()); 997 } else { 998 uint64_t Address = COFF.getImageBase() + RF.ExceptionInformationRVA(); 999 SW.printString("ExceptionRecord", formatSymbol("", Address)); 1000 1001 ErrorOr<SectionRef> Section = getSectionContaining(COFF, Address); 1002 if (!Section) 1003 return false; 1004 1005 return dumpXDataRecord(COFF, *Section, FunctionAddress, Address); 1006 } 1007 } 1008 1009 bool Decoder::dumpPackedEntry(const object::COFFObjectFile &COFF, 1010 const SectionRef Section, uint64_t Offset, 1011 unsigned Index, const RuntimeFunction &RF) { 1012 assert((RF.Flag() == RuntimeFunctionFlag::RFF_Packed || 1013 RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment) && 1014 "unpacked entry cannot be treated as a packed entry"); 1015 1016 ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset); 1017 if (!Function) 1018 Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true); 1019 1020 StringRef FunctionName; 1021 uint64_t FunctionAddress; 1022 if (Function) { 1023 Expected<StringRef> FunctionNameOrErr = Function->getName(); 1024 if (!FunctionNameOrErr) { 1025 std::string Buf; 1026 llvm::raw_string_ostream OS(Buf); 1027 logAllUnhandledErrors(FunctionNameOrErr.takeError(), OS); 1028 OS.flush(); 1029 report_fatal_error(Buf); 1030 } 1031 FunctionName = *FunctionNameOrErr; 1032 Expected<uint64_t> FunctionAddressOrErr = Function->getAddress(); 1033 if (!FunctionAddressOrErr) { 1034 std::string Buf; 1035 llvm::raw_string_ostream OS(Buf); 1036 logAllUnhandledErrors(FunctionAddressOrErr.takeError(), OS); 1037 OS.flush(); 1038 report_fatal_error(Buf); 1039 } 1040 FunctionAddress = *FunctionAddressOrErr; 1041 } else { 1042 const pe32_header *PEHeader; 1043 if (COFF.getPE32Header(PEHeader)) 1044 return false; 1045 FunctionAddress = PEHeader->ImageBase + RF.BeginAddress; 1046 } 1047 1048 SW.printString("Function", formatSymbol(FunctionName, FunctionAddress)); 1049 if (!isAArch64) 1050 SW.printBoolean("Fragment", 1051 RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment); 1052 SW.printNumber("FunctionLength", RF.FunctionLength()); 1053 SW.startLine() << "ReturnType: " << RF.Ret() << '\n'; 1054 SW.printBoolean("HomedParameters", RF.H()); 1055 SW.startLine() << "SavedRegisters: "; 1056 printRegisters(SavedRegisterMask(RF)); 1057 OS << '\n'; 1058 SW.printNumber("StackAdjustment", StackAdjustment(RF) << 2); 1059 1060 return true; 1061 } 1062 1063 bool Decoder::dumpProcedureDataEntry(const COFFObjectFile &COFF, 1064 const SectionRef Section, unsigned Index, 1065 ArrayRef<uint8_t> Contents) { 1066 uint64_t Offset = PDataEntrySize * Index; 1067 const ulittle32_t *Data = 1068 reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset); 1069 1070 const RuntimeFunction Entry(Data); 1071 DictScope RFS(SW, "RuntimeFunction"); 1072 if (Entry.Flag() == RuntimeFunctionFlag::RFF_Unpacked) 1073 return dumpUnpackedEntry(COFF, Section, Offset, Index, Entry); 1074 if (isAArch64) { 1075 SW.startLine() << "Packed unwind data not yet supported for ARM64\n"; 1076 return true; 1077 } 1078 return dumpPackedEntry(COFF, Section, Offset, Index, Entry); 1079 } 1080 1081 void Decoder::dumpProcedureData(const COFFObjectFile &COFF, 1082 const SectionRef Section) { 1083 ArrayRef<uint8_t> Contents; 1084 if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents)) 1085 return; 1086 1087 if (Contents.size() % PDataEntrySize) { 1088 errs() << ".pdata content is not " << PDataEntrySize << "-byte aligned\n"; 1089 return; 1090 } 1091 1092 for (unsigned EI = 0, EE = Contents.size() / PDataEntrySize; EI < EE; ++EI) 1093 if (!dumpProcedureDataEntry(COFF, Section, EI, Contents)) 1094 break; 1095 } 1096 1097 Error Decoder::dumpProcedureData(const COFFObjectFile &COFF) { 1098 for (const auto &Section : COFF.sections()) { 1099 Expected<StringRef> NameOrErr = 1100 COFF.getSectionName(COFF.getCOFFSection(Section)); 1101 if (!NameOrErr) 1102 return NameOrErr.takeError(); 1103 1104 if (NameOrErr->startswith(".pdata")) 1105 dumpProcedureData(COFF, Section); 1106 } 1107 return Error::success(); 1108 } 1109 } 1110 } 1111 } 1112