lib/MC/MCObjectFileInfo.cpp

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