1 //===-- MCObjectFileInfo.cpp - Object File Information --------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/MC/MCObjectFileInfo.h" 11 #include "llvm/ADT/StringExtras.h" 12 #include "llvm/ADT/Triple.h" 13 #include "llvm/BinaryFormat/COFF.h" 14 #include "llvm/BinaryFormat/ELF.h" 15 #include "llvm/MC/MCAsmInfo.h" 16 #include "llvm/MC/MCContext.h" 17 #include "llvm/MC/MCSection.h" 18 #include "llvm/MC/MCSectionCOFF.h" 19 #include "llvm/MC/MCSectionELF.h" 20 #include "llvm/MC/MCSectionMachO.h" 21 #include "llvm/MC/MCSectionWasm.h" 22 23 using namespace llvm; 24 25 static bool useCompactUnwind(const Triple &T) { 26 // Only on darwin. 27 if (!T.isOSDarwin()) 28 return false; 29 30 // aarch64 always has it. 31 if (T.getArch() == Triple::aarch64) 32 return true; 33 34 // armv7k always has it. 35 if (T.isWatchABI()) 36 return true; 37 38 // Use it on newer version of OS X. 39 if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) 40 return true; 41 42 // And the iOS simulator. 43 if (T.isiOS() && 44 (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)) 45 return true; 46 47 return false; 48 } 49 50 void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) { 51 // MachO 52 SupportsWeakOmittedEHFrame = false; 53 54 EHFrameSection = Ctx->getMachOSection( 55 "__TEXT", "__eh_frame", 56 MachO::S_COALESCED | MachO::S_ATTR_NO_TOC | 57 MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT, 58 SectionKind::getReadOnly()); 59 60 if (T.isOSDarwin() && T.getArch() == Triple::aarch64) 61 SupportsCompactUnwindWithoutEHFrame = true; 62 63 if (T.isWatchABI()) 64 OmitDwarfIfHaveCompactUnwind = true; 65 66 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel 67 | dwarf::DW_EH_PE_sdata4; 68 LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel; 69 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 70 dwarf::DW_EH_PE_sdata4; 71 72 // .comm doesn't support alignment before Leopard. 73 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5)) 74 CommDirectiveSupportsAlignment = false; 75 76 TextSection // .text 77 = Ctx->getMachOSection("__TEXT", "__text", 78 MachO::S_ATTR_PURE_INSTRUCTIONS, 79 SectionKind::getText()); 80 DataSection // .data 81 = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData()); 82 83 // BSSSection might not be expected initialized on msvc. 84 BSSSection = nullptr; 85 86 TLSDataSection // .tdata 87 = Ctx->getMachOSection("__DATA", "__thread_data", 88 MachO::S_THREAD_LOCAL_REGULAR, 89 SectionKind::getData()); 90 TLSBSSSection // .tbss 91 = Ctx->getMachOSection("__DATA", "__thread_bss", 92 MachO::S_THREAD_LOCAL_ZEROFILL, 93 SectionKind::getThreadBSS()); 94 95 // TODO: Verify datarel below. 96 TLSTLVSection // .tlv 97 = Ctx->getMachOSection("__DATA", "__thread_vars", 98 MachO::S_THREAD_LOCAL_VARIABLES, 99 SectionKind::getData()); 100 101 TLSThreadInitSection = Ctx->getMachOSection( 102 "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS, 103 SectionKind::getData()); 104 105 CStringSection // .cstring 106 = Ctx->getMachOSection("__TEXT", "__cstring", 107 MachO::S_CSTRING_LITERALS, 108 SectionKind::getMergeable1ByteCString()); 109 UStringSection 110 = Ctx->getMachOSection("__TEXT","__ustring", 0, 111 SectionKind::getMergeable2ByteCString()); 112 FourByteConstantSection // .literal4 113 = Ctx->getMachOSection("__TEXT", "__literal4", 114 MachO::S_4BYTE_LITERALS, 115 SectionKind::getMergeableConst4()); 116 EightByteConstantSection // .literal8 117 = Ctx->getMachOSection("__TEXT", "__literal8", 118 MachO::S_8BYTE_LITERALS, 119 SectionKind::getMergeableConst8()); 120 121 SixteenByteConstantSection // .literal16 122 = Ctx->getMachOSection("__TEXT", "__literal16", 123 MachO::S_16BYTE_LITERALS, 124 SectionKind::getMergeableConst16()); 125 126 ReadOnlySection // .const 127 = Ctx->getMachOSection("__TEXT", "__const", 0, 128 SectionKind::getReadOnly()); 129 130 // If the target is not powerpc, map the coal sections to the non-coal 131 // sections. 132 // 133 // "__TEXT/__textcoal_nt" => section "__TEXT/__text" 134 // "__TEXT/__const_coal" => section "__TEXT/__const" 135 // "__DATA/__datacoal_nt" => section "__DATA/__data" 136 Triple::ArchType ArchTy = T.getArch(); 137 138 if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) { 139 TextCoalSection 140 = Ctx->getMachOSection("__TEXT", "__textcoal_nt", 141 MachO::S_COALESCED | 142 MachO::S_ATTR_PURE_INSTRUCTIONS, 143 SectionKind::getText()); 144 ConstTextCoalSection 145 = Ctx->getMachOSection("__TEXT", "__const_coal", 146 MachO::S_COALESCED, 147 SectionKind::getReadOnly()); 148 DataCoalSection = Ctx->getMachOSection( 149 "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData()); 150 } else { 151 TextCoalSection = TextSection; 152 ConstTextCoalSection = ReadOnlySection; 153 DataCoalSection = DataSection; 154 } 155 156 ConstDataSection // .const_data 157 = Ctx->getMachOSection("__DATA", "__const", 0, 158 SectionKind::getReadOnlyWithRel()); 159 DataCommonSection 160 = Ctx->getMachOSection("__DATA","__common", 161 MachO::S_ZEROFILL, 162 SectionKind::getBSS()); 163 DataBSSSection 164 = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL, 165 SectionKind::getBSS()); 166 167 168 LazySymbolPointerSection 169 = Ctx->getMachOSection("__DATA", "__la_symbol_ptr", 170 MachO::S_LAZY_SYMBOL_POINTERS, 171 SectionKind::getMetadata()); 172 NonLazySymbolPointerSection 173 = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr", 174 MachO::S_NON_LAZY_SYMBOL_POINTERS, 175 SectionKind::getMetadata()); 176 177 ThreadLocalPointerSection 178 = Ctx->getMachOSection("__DATA", "__thread_ptr", 179 MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, 180 SectionKind::getMetadata()); 181 182 // Exception Handling. 183 LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0, 184 SectionKind::getReadOnlyWithRel()); 185 186 COFFDebugSymbolsSection = nullptr; 187 COFFDebugTypesSection = nullptr; 188 COFFGlobalTypeHashesSection = nullptr; 189 190 if (useCompactUnwind(T)) { 191 CompactUnwindSection = 192 Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG, 193 SectionKind::getReadOnly()); 194 195 if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86) 196 CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF 197 else if (T.getArch() == Triple::aarch64) 198 CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF 199 else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb) 200 CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF 201 } 202 203 // Debug Information. 204 DwarfDebugNamesSection = 205 Ctx->getMachOSection("__DWARF", "__debug_names", MachO::S_ATTR_DEBUG, 206 SectionKind::getMetadata(), "debug_names_begin"); 207 DwarfAccelNamesSection = 208 Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG, 209 SectionKind::getMetadata(), "names_begin"); 210 DwarfAccelObjCSection = 211 Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG, 212 SectionKind::getMetadata(), "objc_begin"); 213 // 16 character section limit... 214 DwarfAccelNamespaceSection = 215 Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG, 216 SectionKind::getMetadata(), "namespac_begin"); 217 DwarfAccelTypesSection = 218 Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG, 219 SectionKind::getMetadata(), "types_begin"); 220 221 DwarfSwiftASTSection = 222 Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG, 223 SectionKind::getMetadata()); 224 225 DwarfAbbrevSection = 226 Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG, 227 SectionKind::getMetadata(), "section_abbrev"); 228 DwarfInfoSection = 229 Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG, 230 SectionKind::getMetadata(), "section_info"); 231 DwarfLineSection = 232 Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG, 233 SectionKind::getMetadata(), "section_line"); 234 DwarfLineStrSection = 235 Ctx->getMachOSection("__DWARF", "__debug_line_str", MachO::S_ATTR_DEBUG, 236 SectionKind::getMetadata(), "section_line_str"); 237 DwarfFrameSection = 238 Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG, 239 SectionKind::getMetadata()); 240 DwarfPubNamesSection = 241 Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG, 242 SectionKind::getMetadata()); 243 DwarfPubTypesSection = 244 Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG, 245 SectionKind::getMetadata()); 246 DwarfGnuPubNamesSection = 247 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG, 248 SectionKind::getMetadata()); 249 DwarfGnuPubTypesSection = 250 Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG, 251 SectionKind::getMetadata()); 252 DwarfStrSection = 253 Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG, 254 SectionKind::getMetadata(), "info_string"); 255 DwarfStrOffSection = 256 Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG, 257 SectionKind::getMetadata(), "section_str_off"); 258 DwarfLocSection = 259 Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG, 260 SectionKind::getMetadata(), "section_debug_loc"); 261 DwarfARangesSection = 262 Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG, 263 SectionKind::getMetadata()); 264 DwarfRangesSection = 265 Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG, 266 SectionKind::getMetadata(), "debug_range"); 267 DwarfMacinfoSection = 268 Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG, 269 SectionKind::getMetadata(), "debug_macinfo"); 270 DwarfDebugInlineSection = 271 Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG, 272 SectionKind::getMetadata()); 273 DwarfCUIndexSection = 274 Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG, 275 SectionKind::getMetadata()); 276 DwarfTUIndexSection = 277 Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG, 278 SectionKind::getMetadata()); 279 StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps", 280 0, SectionKind::getMetadata()); 281 282 FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps", 283 0, SectionKind::getMetadata()); 284 285 TLSExtraDataSection = TLSTLVSection; 286 } 287 288 void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) { 289 switch (T.getArch()) { 290 case Triple::mips: 291 case Triple::mipsel: 292 FDECFIEncoding = dwarf::DW_EH_PE_sdata4; 293 break; 294 case Triple::mips64: 295 case Triple::mips64el: 296 FDECFIEncoding = dwarf::DW_EH_PE_sdata8; 297 break; 298 case Triple::ppc64: 299 case Triple::ppc64le: 300 case Triple::x86_64: 301 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | 302 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); 303 break; 304 case Triple::bpfel: 305 case Triple::bpfeb: 306 FDECFIEncoding = dwarf::DW_EH_PE_sdata8; 307 break; 308 default: 309 FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 310 break; 311 } 312 313 switch (T.getArch()) { 314 case Triple::arm: 315 case Triple::armeb: 316 case Triple::thumb: 317 case Triple::thumbeb: 318 if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM) 319 break; 320 // Fallthrough if not using EHABI 321 LLVM_FALLTHROUGH; 322 case Triple::ppc: 323 case Triple::x86: 324 PersonalityEncoding = PositionIndependent 325 ? dwarf::DW_EH_PE_indirect | 326 dwarf::DW_EH_PE_pcrel | 327 dwarf::DW_EH_PE_sdata4 328 : dwarf::DW_EH_PE_absptr; 329 LSDAEncoding = PositionIndependent 330 ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 331 : dwarf::DW_EH_PE_absptr; 332 TTypeEncoding = PositionIndependent 333 ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 334 dwarf::DW_EH_PE_sdata4 335 : dwarf::DW_EH_PE_absptr; 336 break; 337 case Triple::x86_64: 338 if (PositionIndependent) { 339 PersonalityEncoding = 340 dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 341 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); 342 LSDAEncoding = dwarf::DW_EH_PE_pcrel | 343 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); 344 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 345 (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); 346 } else { 347 PersonalityEncoding = 348 Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; 349 LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; 350 TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4; 351 } 352 break; 353 case Triple::hexagon: 354 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 355 LSDAEncoding = dwarf::DW_EH_PE_absptr; 356 FDECFIEncoding = dwarf::DW_EH_PE_absptr; 357 TTypeEncoding = dwarf::DW_EH_PE_absptr; 358 if (PositionIndependent) { 359 PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel; 360 LSDAEncoding |= dwarf::DW_EH_PE_pcrel; 361 FDECFIEncoding |= dwarf::DW_EH_PE_pcrel; 362 TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel; 363 } 364 break; 365 case Triple::aarch64: 366 case Triple::aarch64_be: 367 // The small model guarantees static code/data size < 4GB, but not where it 368 // will be in memory. Most of these could end up >2GB away so even a signed 369 // pc-relative 32-bit address is insufficient, theoretically. 370 if (PositionIndependent) { 371 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 372 dwarf::DW_EH_PE_sdata8; 373 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8; 374 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 375 dwarf::DW_EH_PE_sdata8; 376 } else { 377 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 378 LSDAEncoding = dwarf::DW_EH_PE_absptr; 379 TTypeEncoding = dwarf::DW_EH_PE_absptr; 380 } 381 break; 382 case Triple::lanai: 383 LSDAEncoding = dwarf::DW_EH_PE_absptr; 384 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 385 TTypeEncoding = dwarf::DW_EH_PE_absptr; 386 break; 387 case Triple::mips: 388 case Triple::mipsel: 389 case Triple::mips64: 390 case Triple::mips64el: 391 // MIPS uses indirect pointer to refer personality functions and types, so 392 // that the eh_frame section can be read-only. DW.ref.personality will be 393 // generated for relocation. 394 PersonalityEncoding = dwarf::DW_EH_PE_indirect; 395 // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't 396 // identify N64 from just a triple. 397 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 398 dwarf::DW_EH_PE_sdata4; 399 // We don't support PC-relative LSDA references in GAS so we use the default 400 // DW_EH_PE_absptr for those. 401 402 // FreeBSD must be explicit about the data size and using pcrel since it's 403 // assembler/linker won't do the automatic conversion that the Linux tools 404 // do. 405 if (T.isOSFreeBSD()) { 406 PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 407 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 408 } 409 break; 410 case Triple::ppc64: 411 case Triple::ppc64le: 412 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 413 dwarf::DW_EH_PE_udata8; 414 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8; 415 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 416 dwarf::DW_EH_PE_udata8; 417 break; 418 case Triple::sparcel: 419 case Triple::sparc: 420 if (PositionIndependent) { 421 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 422 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 423 dwarf::DW_EH_PE_sdata4; 424 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 425 dwarf::DW_EH_PE_sdata4; 426 } else { 427 LSDAEncoding = dwarf::DW_EH_PE_absptr; 428 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 429 TTypeEncoding = dwarf::DW_EH_PE_absptr; 430 } 431 break; 432 case Triple::sparcv9: 433 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 434 if (PositionIndependent) { 435 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 436 dwarf::DW_EH_PE_sdata4; 437 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 438 dwarf::DW_EH_PE_sdata4; 439 } else { 440 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 441 TTypeEncoding = dwarf::DW_EH_PE_absptr; 442 } 443 break; 444 case Triple::systemz: 445 // All currently-defined code models guarantee that 4-byte PC-relative 446 // values will be in range. 447 if (PositionIndependent) { 448 PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 449 dwarf::DW_EH_PE_sdata4; 450 LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; 451 TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | 452 dwarf::DW_EH_PE_sdata4; 453 } else { 454 PersonalityEncoding = dwarf::DW_EH_PE_absptr; 455 LSDAEncoding = dwarf::DW_EH_PE_absptr; 456 TTypeEncoding = dwarf::DW_EH_PE_absptr; 457 } 458 break; 459 default: 460 break; 461 } 462 463 unsigned EHSectionType = T.getArch() == Triple::x86_64 464 ? ELF::SHT_X86_64_UNWIND 465 : ELF::SHT_PROGBITS; 466 467 // Solaris requires different flags for .eh_frame to seemingly every other 468 // platform. 469 unsigned EHSectionFlags = ELF::SHF_ALLOC; 470 if (T.isOSSolaris() && T.getArch() != Triple::x86_64) 471 EHSectionFlags |= ELF::SHF_WRITE; 472 473 // ELF 474 BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS, 475 ELF::SHF_WRITE | ELF::SHF_ALLOC); 476 477 TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS, 478 ELF::SHF_EXECINSTR | ELF::SHF_ALLOC); 479 480 DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS, 481 ELF::SHF_WRITE | ELF::SHF_ALLOC); 482 483 ReadOnlySection = 484 Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); 485 486 TLSDataSection = 487 Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS, 488 ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE); 489 490 TLSBSSSection = Ctx->getELFSection( 491 ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE); 492 493 DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS, 494 ELF::SHF_ALLOC | ELF::SHF_WRITE); 495 496 MergeableConst4Section = 497 Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS, 498 ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, ""); 499 500 MergeableConst8Section = 501 Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS, 502 ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, ""); 503 504 MergeableConst16Section = 505 Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS, 506 ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, ""); 507 508 MergeableConst32Section = 509 Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS, 510 ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, ""); 511 512 // Exception Handling Sections. 513 514 // FIXME: We're emitting LSDA info into a readonly section on ELF, even though 515 // it contains relocatable pointers. In PIC mode, this is probably a big 516 // runtime hit for C++ apps. Either the contents of the LSDA need to be 517 // adjusted or this should be a data section. 518 LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS, 519 ELF::SHF_ALLOC); 520 521 COFFDebugSymbolsSection = nullptr; 522 COFFDebugTypesSection = nullptr; 523 524 unsigned DebugSecType = ELF::SHT_PROGBITS; 525 526 // MIPS .debug_* sections should have SHT_MIPS_DWARF section type 527 // to distinguish among sections contain DWARF and ECOFF debug formats. 528 // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS. 529 if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel || 530 T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el) 531 DebugSecType = ELF::SHT_MIPS_DWARF; 532 533 // Debug Info Sections. 534 DwarfAbbrevSection = 535 Ctx->getELFSection(".debug_abbrev", DebugSecType, 0); 536 DwarfInfoSection = Ctx->getELFSection(".debug_info", DebugSecType, 0); 537 DwarfLineSection = Ctx->getELFSection(".debug_line", DebugSecType, 0); 538 DwarfLineStrSection = 539 Ctx->getELFSection(".debug_line_str", DebugSecType, 540 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, ""); 541 DwarfFrameSection = Ctx->getELFSection(".debug_frame", DebugSecType, 0); 542 DwarfPubNamesSection = 543 Ctx->getELFSection(".debug_pubnames", DebugSecType, 0); 544 DwarfPubTypesSection = 545 Ctx->getELFSection(".debug_pubtypes", DebugSecType, 0); 546 DwarfGnuPubNamesSection = 547 Ctx->getELFSection(".debug_gnu_pubnames", DebugSecType, 0); 548 DwarfGnuPubTypesSection = 549 Ctx->getELFSection(".debug_gnu_pubtypes", DebugSecType, 0); 550 DwarfStrSection = 551 Ctx->getELFSection(".debug_str", DebugSecType, 552 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, ""); 553 DwarfLocSection = Ctx->getELFSection(".debug_loc", DebugSecType, 0); 554 DwarfARangesSection = 555 Ctx->getELFSection(".debug_aranges", DebugSecType, 0); 556 DwarfRangesSection = 557 Ctx->getELFSection(".debug_ranges", DebugSecType, 0); 558 DwarfMacinfoSection = 559 Ctx->getELFSection(".debug_macinfo", DebugSecType, 0); 560 561 // DWARF5 Experimental Debug Info 562 563 // Accelerator Tables 564 DwarfDebugNamesSection = 565 Ctx->getELFSection(".debug_names", ELF::SHT_PROGBITS, 0); 566 DwarfAccelNamesSection = 567 Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0); 568 DwarfAccelObjCSection = 569 Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0); 570 DwarfAccelNamespaceSection = 571 Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0); 572 DwarfAccelTypesSection = 573 Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0); 574 575 // String Offset and Address Sections 576 DwarfStrOffSection = 577 Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0); 578 DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0); 579 580 // Fission Sections 581 DwarfInfoDWOSection = 582 Ctx->getELFSection(".debug_info.dwo", DebugSecType, 0); 583 DwarfTypesDWOSection = 584 Ctx->getELFSection(".debug_types.dwo", DebugSecType, 0); 585 DwarfAbbrevDWOSection = 586 Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, 0); 587 DwarfStrDWOSection = 588 Ctx->getELFSection(".debug_str.dwo", DebugSecType, 589 ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, ""); 590 DwarfLineDWOSection = 591 Ctx->getELFSection(".debug_line.dwo", DebugSecType, 0); 592 DwarfLocDWOSection = 593 Ctx->getELFSection(".debug_loc.dwo", DebugSecType, 0); 594 DwarfStrOffDWOSection = 595 Ctx->getELFSection(".debug_str_offsets.dwo", DebugSecType, 0); 596 597 // DWP Sections 598 DwarfCUIndexSection = 599 Ctx->getELFSection(".debug_cu_index", DebugSecType, 0); 600 DwarfTUIndexSection = 601 Ctx->getELFSection(".debug_tu_index", DebugSecType, 0); 602 603 StackMapSection = 604 Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); 605 606 FaultMapSection = 607 Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); 608 609 EHFrameSection = 610 Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags); 611 612 StackSizesSection = Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, 0); 613 } 614 615 void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) { 616 EHFrameSection = Ctx->getCOFFSection( 617 ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 618 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, 619 SectionKind::getData()); 620 621 // Set the `IMAGE_SCN_MEM_16BIT` flag when compiling for thumb mode. This is 622 // used to indicate to the linker that the text segment contains thumb instructions 623 // and to set the ISA selection bit for calls accordingly. 624 const bool IsThumb = T.getArch() == Triple::thumb; 625 626 CommDirectiveSupportsAlignment = true; 627 628 // COFF 629 BSSSection = Ctx->getCOFFSection( 630 ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | 631 COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, 632 SectionKind::getBSS()); 633 TextSection = Ctx->getCOFFSection( 634 ".text", 635 (IsThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) | 636 COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE | 637 COFF::IMAGE_SCN_MEM_READ, 638 SectionKind::getText()); 639 DataSection = Ctx->getCOFFSection( 640 ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | 641 COFF::IMAGE_SCN_MEM_WRITE, 642 SectionKind::getData()); 643 ReadOnlySection = Ctx->getCOFFSection( 644 ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, 645 SectionKind::getReadOnly()); 646 647 // FIXME: We're emitting LSDA info into a readonly section on COFF, even 648 // though it contains relocatable pointers. In PIC mode, this is probably a 649 // big runtime hit for C++ apps. Either the contents of the LSDA need to be 650 // adjusted or this should be a data section. 651 if (T.getArch() == Triple::x86_64) { 652 // On Windows 64 with SEH, the LSDA is emitted into the .xdata section 653 LSDASection = nullptr; 654 } else { 655 LSDASection = Ctx->getCOFFSection(".gcc_except_table", 656 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 657 COFF::IMAGE_SCN_MEM_READ, 658 SectionKind::getReadOnly()); 659 } 660 661 // Debug info. 662 COFFDebugSymbolsSection = 663 Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE | 664 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 665 COFF::IMAGE_SCN_MEM_READ), 666 SectionKind::getMetadata()); 667 COFFDebugTypesSection = 668 Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE | 669 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 670 COFF::IMAGE_SCN_MEM_READ), 671 SectionKind::getMetadata()); 672 COFFGlobalTypeHashesSection = Ctx->getCOFFSection( 673 ".debug$H", 674 (COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 675 COFF::IMAGE_SCN_MEM_READ), 676 SectionKind::getMetadata()); 677 678 DwarfAbbrevSection = Ctx->getCOFFSection( 679 ".debug_abbrev", 680 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 681 COFF::IMAGE_SCN_MEM_READ, 682 SectionKind::getMetadata(), "section_abbrev"); 683 DwarfInfoSection = Ctx->getCOFFSection( 684 ".debug_info", 685 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 686 COFF::IMAGE_SCN_MEM_READ, 687 SectionKind::getMetadata(), "section_info"); 688 DwarfLineSection = Ctx->getCOFFSection( 689 ".debug_line", 690 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 691 COFF::IMAGE_SCN_MEM_READ, 692 SectionKind::getMetadata(), "section_line"); 693 DwarfLineStrSection = Ctx->getCOFFSection( 694 ".debug_line_str", 695 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 696 COFF::IMAGE_SCN_MEM_READ, 697 SectionKind::getMetadata(), "section_line_str"); 698 DwarfFrameSection = Ctx->getCOFFSection( 699 ".debug_frame", 700 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 701 COFF::IMAGE_SCN_MEM_READ, 702 SectionKind::getMetadata()); 703 DwarfPubNamesSection = Ctx->getCOFFSection( 704 ".debug_pubnames", 705 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 706 COFF::IMAGE_SCN_MEM_READ, 707 SectionKind::getMetadata()); 708 DwarfPubTypesSection = Ctx->getCOFFSection( 709 ".debug_pubtypes", 710 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 711 COFF::IMAGE_SCN_MEM_READ, 712 SectionKind::getMetadata()); 713 DwarfGnuPubNamesSection = Ctx->getCOFFSection( 714 ".debug_gnu_pubnames", 715 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 716 COFF::IMAGE_SCN_MEM_READ, 717 SectionKind::getMetadata()); 718 DwarfGnuPubTypesSection = Ctx->getCOFFSection( 719 ".debug_gnu_pubtypes", 720 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 721 COFF::IMAGE_SCN_MEM_READ, 722 SectionKind::getMetadata()); 723 DwarfStrSection = Ctx->getCOFFSection( 724 ".debug_str", 725 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 726 COFF::IMAGE_SCN_MEM_READ, 727 SectionKind::getMetadata(), "info_string"); 728 DwarfStrOffSection = Ctx->getCOFFSection( 729 ".debug_str_offsets", 730 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 731 COFF::IMAGE_SCN_MEM_READ, 732 SectionKind::getMetadata(), "section_str_off"); 733 DwarfLocSection = Ctx->getCOFFSection( 734 ".debug_loc", 735 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 736 COFF::IMAGE_SCN_MEM_READ, 737 SectionKind::getMetadata(), "section_debug_loc"); 738 DwarfARangesSection = Ctx->getCOFFSection( 739 ".debug_aranges", 740 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 741 COFF::IMAGE_SCN_MEM_READ, 742 SectionKind::getMetadata()); 743 DwarfRangesSection = Ctx->getCOFFSection( 744 ".debug_ranges", 745 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 746 COFF::IMAGE_SCN_MEM_READ, 747 SectionKind::getMetadata(), "debug_range"); 748 DwarfMacinfoSection = Ctx->getCOFFSection( 749 ".debug_macinfo", 750 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 751 COFF::IMAGE_SCN_MEM_READ, 752 SectionKind::getMetadata(), "debug_macinfo"); 753 DwarfInfoDWOSection = Ctx->getCOFFSection( 754 ".debug_info.dwo", 755 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 756 COFF::IMAGE_SCN_MEM_READ, 757 SectionKind::getMetadata(), "section_info_dwo"); 758 DwarfTypesDWOSection = Ctx->getCOFFSection( 759 ".debug_types.dwo", 760 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 761 COFF::IMAGE_SCN_MEM_READ, 762 SectionKind::getMetadata(), "section_types_dwo"); 763 DwarfAbbrevDWOSection = Ctx->getCOFFSection( 764 ".debug_abbrev.dwo", 765 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 766 COFF::IMAGE_SCN_MEM_READ, 767 SectionKind::getMetadata(), "section_abbrev_dwo"); 768 DwarfStrDWOSection = Ctx->getCOFFSection( 769 ".debug_str.dwo", 770 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 771 COFF::IMAGE_SCN_MEM_READ, 772 SectionKind::getMetadata(), "skel_string"); 773 DwarfLineDWOSection = Ctx->getCOFFSection( 774 ".debug_line.dwo", 775 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 776 COFF::IMAGE_SCN_MEM_READ, 777 SectionKind::getMetadata()); 778 DwarfLocDWOSection = Ctx->getCOFFSection( 779 ".debug_loc.dwo", 780 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 781 COFF::IMAGE_SCN_MEM_READ, 782 SectionKind::getMetadata(), "skel_loc"); 783 DwarfStrOffDWOSection = Ctx->getCOFFSection( 784 ".debug_str_offsets.dwo", 785 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 786 COFF::IMAGE_SCN_MEM_READ, 787 SectionKind::getMetadata(), "section_str_off_dwo"); 788 DwarfAddrSection = Ctx->getCOFFSection( 789 ".debug_addr", 790 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 791 COFF::IMAGE_SCN_MEM_READ, 792 SectionKind::getMetadata(), "addr_sec"); 793 DwarfCUIndexSection = Ctx->getCOFFSection( 794 ".debug_cu_index", 795 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 796 COFF::IMAGE_SCN_MEM_READ, 797 SectionKind::getMetadata()); 798 DwarfTUIndexSection = Ctx->getCOFFSection( 799 ".debug_tu_index", 800 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 801 COFF::IMAGE_SCN_MEM_READ, 802 SectionKind::getMetadata()); 803 DwarfDebugNamesSection = Ctx->getCOFFSection( 804 ".debug_names", 805 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 806 COFF::IMAGE_SCN_MEM_READ, 807 SectionKind::getMetadata(), "debug_names_begin"); 808 DwarfAccelNamesSection = Ctx->getCOFFSection( 809 ".apple_names", 810 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 811 COFF::IMAGE_SCN_MEM_READ, 812 SectionKind::getMetadata(), "names_begin"); 813 DwarfAccelNamespaceSection = Ctx->getCOFFSection( 814 ".apple_namespaces", 815 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 816 COFF::IMAGE_SCN_MEM_READ, 817 SectionKind::getMetadata(), "namespac_begin"); 818 DwarfAccelTypesSection = Ctx->getCOFFSection( 819 ".apple_types", 820 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 821 COFF::IMAGE_SCN_MEM_READ, 822 SectionKind::getMetadata(), "types_begin"); 823 DwarfAccelObjCSection = Ctx->getCOFFSection( 824 ".apple_objc", 825 COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 826 COFF::IMAGE_SCN_MEM_READ, 827 SectionKind::getMetadata(), "objc_begin"); 828 829 DrectveSection = Ctx->getCOFFSection( 830 ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE, 831 SectionKind::getMetadata()); 832 833 PDataSection = Ctx->getCOFFSection( 834 ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, 835 SectionKind::getData()); 836 837 XDataSection = Ctx->getCOFFSection( 838 ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, 839 SectionKind::getData()); 840 841 SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO, 842 SectionKind::getMetadata()); 843 844 GFIDsSection = Ctx->getCOFFSection(".gfids$y", 845 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 846 COFF::IMAGE_SCN_MEM_READ, 847 SectionKind::getMetadata()); 848 849 TLSDataSection = Ctx->getCOFFSection( 850 ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | 851 COFF::IMAGE_SCN_MEM_WRITE, 852 SectionKind::getData()); 853 854 StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps", 855 COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 856 COFF::IMAGE_SCN_MEM_READ, 857 SectionKind::getReadOnly()); 858 } 859 860 void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) { 861 // TODO: Set the section types and flags. 862 TextSection = Ctx->getWasmSection(".text", SectionKind::getText()); 863 DataSection = Ctx->getWasmSection(".data", SectionKind::getData()); 864 865 // TODO: Set the section types and flags. 866 DwarfLineSection = Ctx->getWasmSection(".debug_line", SectionKind::getMetadata()); 867 DwarfLineStrSection = 868 Ctx->getWasmSection(".debug_line_str", SectionKind::getMetadata()); 869 DwarfStrSection = Ctx->getWasmSection(".debug_str", SectionKind::getMetadata()); 870 DwarfLocSection = Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata()); 871 DwarfAbbrevSection = Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata(), "section_abbrev"); 872 DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata()); 873 DwarfRangesSection = Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata(), "debug_range"); 874 DwarfMacinfoSection = Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata(), "debug_macinfo"); 875 DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata()); 876 DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata()); 877 DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata()); 878 DwarfInfoSection = Ctx->getWasmSection(".debug_info", SectionKind::getMetadata(), "section_info"); 879 DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata()); 880 DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata()); 881 DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata()); 882 883 // TODO: Define more sections. 884 } 885 886 void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC, 887 MCContext &ctx, 888 bool LargeCodeModel) { 889 PositionIndependent = PIC; 890 Ctx = &ctx; 891 892 // Common. 893 CommDirectiveSupportsAlignment = true; 894 SupportsWeakOmittedEHFrame = true; 895 SupportsCompactUnwindWithoutEHFrame = false; 896 OmitDwarfIfHaveCompactUnwind = false; 897 898 PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding = 899 dwarf::DW_EH_PE_absptr; 900 901 CompactUnwindDwarfEHFrameOnly = 0; 902 903 EHFrameSection = nullptr; // Created on demand. 904 CompactUnwindSection = nullptr; // Used only by selected targets. 905 DwarfAccelNamesSection = nullptr; // Used only by selected targets. 906 DwarfAccelObjCSection = nullptr; // Used only by selected targets. 907 DwarfAccelNamespaceSection = nullptr; // Used only by selected targets. 908 DwarfAccelTypesSection = nullptr; // Used only by selected targets. 909 910 TT = TheTriple; 911 912 switch (TT.getObjectFormat()) { 913 case Triple::MachO: 914 Env = IsMachO; 915 initMachOMCObjectFileInfo(TT); 916 break; 917 case Triple::COFF: 918 if (!TT.isOSWindows()) 919 report_fatal_error( 920 "Cannot initialize MC for non-Windows COFF object files."); 921 922 Env = IsCOFF; 923 initCOFFMCObjectFileInfo(TT); 924 break; 925 case Triple::ELF: 926 Env = IsELF; 927 initELFMCObjectFileInfo(TT, LargeCodeModel); 928 break; 929 case Triple::Wasm: 930 Env = IsWasm; 931 initWasmMCObjectFileInfo(TT); 932 break; 933 case Triple::UnknownObjectFormat: 934 report_fatal_error("Cannot initialize MC for unknown object file format."); 935 break; 936 } 937 } 938 939 MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const { 940 return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP, 941 0, utostr(Hash)); 942 } 943