//===-- MCObjectFileInfo.cpp - Object File Information --------------------===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is distributed under the University of Illinois Open Source

// License. See LICENSE.TXT for details.

//

//===----------------------------------------------------------------------===//

#include "llvm/MC/MCObjectFileInfo.h"

#include "llvm/ADT/StringExtras.h"

#include "llvm/ADT/Triple.h"

#include "llvm/MC/MCAsmInfo.h"

#include "llvm/MC/MCContext.h"

#include "llvm/MC/MCSection.h"

#include "llvm/MC/MCSectionCOFF.h"

#include "llvm/MC/MCSectionELF.h"

#include "llvm/MC/MCSectionMachO.h"

#include "llvm/Support/COFF.h"

using namespace llvm_ks;

static bool useCompactUnwind(const Triple &T) {

  // Only on darwin.

  if (!T.isOSDarwin())

    return false;

  // aarch64 always has it.

  if (T.getArch() == Triple::aarch64)

    return true;

  // armv7k always has it.

  if (T.isWatchABI())

    return true;

  // Use it on newer version of OS X.

  if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))

    return true;

  // And the iOS simulator.

  if (T.isiOS() &&

      (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))

    return true;

  return false;

}

void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) {

  // MachO

  SupportsWeakOmittedEHFrame = false;

  EHFrameSection = Ctx->getMachOSection(

      "__TEXT", "__eh_frame",

      MachO::S_COALESCED | MachO::S_ATTR_NO_TOC |

          MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,

      SectionKind::getReadOnly());

  if (T.isOSDarwin() && T.getArch() == Triple::aarch64)

    SupportsCompactUnwindWithoutEHFrame = true;

  if (T.isWatchABI())

    OmitDwarfIfHaveCompactUnwind = true;

  PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel

    | dwarf::DW_EH_PE_sdata4;

  LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;

  TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |

    dwarf::DW_EH_PE_sdata4;

  // .comm doesn't support alignment before Leopard.

  if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))

    CommDirectiveSupportsAlignment = false;

  TextSection // .text

    = Ctx->getMachOSection("__TEXT", "__text",

                           MachO::S_ATTR_PURE_INSTRUCTIONS,

                           SectionKind::getText());

  DataSection // .data

      = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData());

  // BSSSection might not be expected initialized on msvc.

  BSSSection = nullptr;

  TLSDataSection // .tdata

      = Ctx->getMachOSection("__DATA", "__thread_data",

                             MachO::S_THREAD_LOCAL_REGULAR,

                             SectionKind::getData());

  TLSBSSSection // .tbss

    = Ctx->getMachOSection("__DATA", "__thread_bss",

                           MachO::S_THREAD_LOCAL_ZEROFILL,

                           SectionKind::getThreadBSS());

  // TODO: Verify datarel below.

  TLSTLVSection // .tlv

      = Ctx->getMachOSection("__DATA", "__thread_vars",

                             MachO::S_THREAD_LOCAL_VARIABLES,

                             SectionKind::getData());

  TLSThreadInitSection = Ctx->getMachOSection(

      "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,

      SectionKind::getData());

  CStringSection // .cstring

    = Ctx->getMachOSection("__TEXT", "__cstring",

                           MachO::S_CSTRING_LITERALS,

                           SectionKind::getMergeable1ByteCString());

  UStringSection

    = Ctx->getMachOSection("__TEXT","__ustring", 0,

                           SectionKind::getMergeable2ByteCString());

  FourByteConstantSection // .literal4

    = Ctx->getMachOSection("__TEXT", "__literal4",

                           MachO::S_4BYTE_LITERALS,

                           SectionKind::getMergeableConst4());

  EightByteConstantSection // .literal8

    = Ctx->getMachOSection("__TEXT", "__literal8",

                           MachO::S_8BYTE_LITERALS,

                           SectionKind::getMergeableConst8());

  SixteenByteConstantSection // .literal16

      = Ctx->getMachOSection("__TEXT", "__literal16",

                             MachO::S_16BYTE_LITERALS,

                             SectionKind::getMergeableConst16());

  ReadOnlySection  // .const

    = Ctx->getMachOSection("__TEXT", "__const", 0,

                           SectionKind::getReadOnly());

  // If the target is not powerpc, map the coal sections to the non-coal

  // sections.

  //

  // "__TEXT/__textcoal_nt" => section "__TEXT/__text"

  // "__TEXT/__const_coal"  => section "__TEXT/__const"

  // "__DATA/__datacoal_nt" => section "__DATA/__data"

  Triple::ArchType ArchTy = T.getArch();

  if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) {

    TextCoalSection

      = Ctx->getMachOSection("__TEXT", "__textcoal_nt",

                             MachO::S_COALESCED |

                             MachO::S_ATTR_PURE_INSTRUCTIONS,

                             SectionKind::getText());

    ConstTextCoalSection

      = Ctx->getMachOSection("__TEXT", "__const_coal",

                             MachO::S_COALESCED,

                             SectionKind::getReadOnly());

    DataCoalSection = Ctx->getMachOSection(

        "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData());

  } else {

    TextCoalSection = TextSection;

    ConstTextCoalSection = ReadOnlySection;

    DataCoalSection = DataSection;

  }

  ConstDataSection  // .const_data

    = Ctx->getMachOSection("__DATA", "__const", 0,

                           SectionKind::getReadOnlyWithRel());

  DataCommonSection

    = Ctx->getMachOSection("__DATA","__common",

                           MachO::S_ZEROFILL,

                           SectionKind::getBSS());

  DataBSSSection

    = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,

                           SectionKind::getBSS());

  LazySymbolPointerSection

    = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",

                           MachO::S_LAZY_SYMBOL_POINTERS,

                           SectionKind::getMetadata());

  NonLazySymbolPointerSection

    = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",

                           MachO::S_NON_LAZY_SYMBOL_POINTERS,

                           SectionKind::getMetadata());

  // Exception Handling.

  LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,

                                     SectionKind::getReadOnlyWithRel());

  COFFDebugSymbolsSection = nullptr;

  COFFDebugTypesSection = nullptr;

  if (useCompactUnwind(T)) {

    CompactUnwindSection =

        Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,

                             SectionKind::getReadOnly());

    if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)

      CompactUnwindDwarfEHFrameOnly = 0x04000000;  // UNWIND_X86_64_MODE_DWARF

    else if (T.getArch() == Triple::aarch64)

      CompactUnwindDwarfEHFrameOnly = 0x03000000;  // UNWIND_ARM64_MODE_DWARF

    else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)

      CompactUnwindDwarfEHFrameOnly = 0x04000000;  // UNWIND_ARM_MODE_DWARF

  }

  // Debug Information.

  DwarfAccelNamesSection =

      Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "names_begin");

  DwarfAccelObjCSection =

      Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "objc_begin");

  // 16 character section limit...

  DwarfAccelNamespaceSection =

      Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "namespac_begin");

  DwarfAccelTypesSection =

      Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "types_begin");

  DwarfAbbrevSection =

      Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "section_abbrev");

  DwarfInfoSection =

      Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "section_info");

  DwarfLineSection =

      Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "section_line");

  DwarfFrameSection =

      Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfPubNamesSection =

      Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfPubTypesSection =

      Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfGnuPubNamesSection =

      Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfGnuPubTypesSection =

      Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfStrSection =

      Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "info_string");

  DwarfLocSection =

      Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "section_debug_loc");

  DwarfARangesSection =

      Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfRangesSection =

      Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "debug_range");

  DwarfMacinfoSection =

      Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata(), "debug_macinfo");

  DwarfDebugInlineSection =

      Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfCUIndexSection =

      Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  DwarfTUIndexSection =

      Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,

                           SectionKind::getMetadata());

  StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",

                                         0, SectionKind::getMetadata());

  FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",

                                         0, SectionKind::getMetadata());

  TLSExtraDataSection = TLSTLVSection;

}

void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) {

  switch (T.getArch()) {

  case Triple::mips:

  case Triple::mipsel:

    FDECFIEncoding = dwarf::DW_EH_PE_sdata4;

    break;

  case Triple::mips64:

  case Triple::mips64el:

    FDECFIEncoding = dwarf::DW_EH_PE_sdata8;

    break;

  case Triple::x86_64:

    break;

  default:

    FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;

    break;

  }

  switch (T.getArch()) {

  case Triple::arm:

  case Triple::armeb:

  case Triple::thumb:

  case Triple::thumbeb:

    if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)

      break;

    // Fallthrough if not using EHABI

  case Triple::ppc:

  case Triple::x86:

    break;

  case Triple::x86_64:

    break;

  case Triple::aarch64:

  case Triple::aarch64_be:

    // The small model guarantees static code/data size < 4GB, but not where it

    // will be in memory. Most of these could end up >2GB away so even a signed

    // pc-relative 32-bit address is insufficient, theoretically.

    break;

  case Triple::mips:

  case Triple::mipsel:

  case Triple::mips64:

  case Triple::mips64el:

    // MIPS uses indirect pointer to refer personality functions and types, so

    // that the eh_frame section can be read-only. DW.ref.personality will be

    // generated for relocation.

    PersonalityEncoding = dwarf::DW_EH_PE_indirect;

    // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't

    //        identify N64 from just a triple.

    TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |

                    dwarf::DW_EH_PE_sdata4;

    // We don't support PC-relative LSDA references in GAS so we use the default

    // DW_EH_PE_absptr for those.

    break;

  case Triple::ppc64:

  case Triple::ppc64le:

    PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |

      dwarf::DW_EH_PE_udata8;

    LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;

    TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |

      dwarf::DW_EH_PE_udata8;

    break;

  case Triple::sparcel:

  case Triple::sparc:

    break;

  case Triple::sparcv9:

    LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;

    break;

  case Triple::systemz:

    // All currently-defined code models guarantee that 4-byte PC-relative

    // values will be in range.

    break;

  default:

    break;

  }

  unsigned EHSectionType = T.getArch() == Triple::x86_64

                               ? ELF::SHT_X86_64_UNWIND

                               : ELF::SHT_PROGBITS;

  // Solaris requires different flags for .eh_frame to seemingly every other

  // platform.

  unsigned EHSectionFlags = ELF::SHF_ALLOC;

  if (T.isOSSolaris() && T.getArch() != Triple::x86_64)

    EHSectionFlags |= ELF::SHF_WRITE;

  // ELF

  BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,

                                  ELF::SHF_WRITE | ELF::SHF_ALLOC);

  TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,

                                   ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);

  DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,

                                   ELF::SHF_WRITE | ELF::SHF_ALLOC);

  ReadOnlySection =

      Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);

  TLSDataSection =

      Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,

                         ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);

  TLSBSSSection = Ctx->getELFSection(

      ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);

  DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,

                                        ELF::SHF_ALLOC | ELF::SHF_WRITE);

  MergeableConst4Section =

      Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,

                         ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");

  MergeableConst8Section =

      Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,

                         ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");

  MergeableConst16Section =

      Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,

                         ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");

  StaticCtorSection = Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,

                                         ELF::SHF_ALLOC | ELF::SHF_WRITE);

  StaticDtorSection = Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,

                                         ELF::SHF_ALLOC | ELF::SHF_WRITE);

  // Exception Handling Sections.

  // FIXME: We're emitting LSDA info into a readonly section on ELF, even though

  // it contains relocatable pointers.  In PIC mode, this is probably a big

  // runtime hit for C++ apps.  Either the contents of the LSDA need to be

  // adjusted or this should be a data section.

  LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,

                                   ELF::SHF_ALLOC);

  COFFDebugSymbolsSection = nullptr;

  COFFDebugTypesSection = nullptr;

  // Debug Info Sections.

  DwarfAbbrevSection = Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,

                                          "section_abbrev");

  DwarfInfoSection =

      Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0, "section_info");

  DwarfLineSection = Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0);

  DwarfFrameSection = Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0);

  DwarfPubNamesSection =

      Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0);

  DwarfPubTypesSection =

      Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0);

  DwarfGnuPubNamesSection =

      Ctx->getELFSection(".debug_gnu_pubnames", ELF::SHT_PROGBITS, 0);

  DwarfGnuPubTypesSection =

      Ctx->getELFSection(".debug_gnu_pubtypes", ELF::SHT_PROGBITS, 0);

  DwarfStrSection =

      Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,

                         ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");

  DwarfLocSection = Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0);

  DwarfARangesSection =

      Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0);

  DwarfRangesSection =

      Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0, "debug_range");

  DwarfMacinfoSection = Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS,

                                           0, "debug_macinfo");

  // DWARF5 Experimental Debug Info

  // Accelerator Tables

  DwarfAccelNamesSection =

      Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0, "names_begin");

  DwarfAccelObjCSection =

      Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0, "objc_begin");

  DwarfAccelNamespaceSection = Ctx->getELFSection(

      ".apple_namespaces", ELF::SHT_PROGBITS, 0, "namespac_begin");

  DwarfAccelTypesSection =

      Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0, "types_begin");

  // Fission Sections

  DwarfInfoDWOSection =

      Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0);

  DwarfTypesDWOSection =

      Ctx->getELFSection(".debug_types.dwo", ELF::SHT_PROGBITS, 0);

  DwarfAbbrevDWOSection =

      Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0);

  DwarfStrDWOSection =

      Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,

                         ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");

  DwarfLineDWOSection =

      Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0);

  DwarfLocDWOSection =

      Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0, "skel_loc");

  DwarfStrOffDWOSection =

      Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0);

  DwarfAddrSection =

      Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0, "addr_sec");

  // DWP Sections

  DwarfCUIndexSection =

      Ctx->getELFSection(".debug_cu_index", ELF::SHT_PROGBITS, 0);

  DwarfTUIndexSection =

      Ctx->getELFSection(".debug_tu_index", ELF::SHT_PROGBITS, 0);

  StackMapSection =

      Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);

  FaultMapSection =

      Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);

  EHFrameSection =

      Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);

}

void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) {

  EHFrameSection = Ctx->getCOFFSection(

      ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                       COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,

      SectionKind::getData());

  bool IsWoA = T.getArch() == Triple::arm || T.getArch() == Triple::thumb;

  CommDirectiveSupportsAlignment = true;

  // COFF

  BSSSection = Ctx->getCOFFSection(

      ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |

                  COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,

      SectionKind::getBSS());

  TextSection = Ctx->getCOFFSection(

      ".text",

      (IsWoA ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) |

          COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getText());

  DataSection = Ctx->getCOFFSection(

      ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |

                   COFF::IMAGE_SCN_MEM_WRITE,

      SectionKind::getData());

  ReadOnlySection = Ctx->getCOFFSection(

      ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getReadOnly());

  if (T.isKnownWindowsMSVCEnvironment() || T.isWindowsItaniumEnvironment()) {

    StaticCtorSection =

        Ctx->getCOFFSection(".CRT$XCU", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                            COFF::IMAGE_SCN_MEM_READ,

                            SectionKind::getReadOnly());

    StaticDtorSection =

        Ctx->getCOFFSection(".CRT$XTX", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                            COFF::IMAGE_SCN_MEM_READ,

                            SectionKind::getReadOnly());

  } else {

    StaticCtorSection = Ctx->getCOFFSection(

        ".ctors", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                      COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,

        SectionKind::getData());

    StaticDtorSection = Ctx->getCOFFSection(

        ".dtors", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                      COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,

        SectionKind::getData());

  }

  // FIXME: We're emitting LSDA info into a readonly section on COFF, even

  // though it contains relocatable pointers.  In PIC mode, this is probably a

  // big runtime hit for C++ apps.  Either the contents of the LSDA need to be

  // adjusted or this should be a data section.

  if (T.getArch() == Triple::x86_64) {

    // On Windows 64 with SEH, the LSDA is emitted into the .xdata section

    LSDASection = nullptr;

  } else {

    LSDASection = Ctx->getCOFFSection(".gcc_except_table",

                                      COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                          COFF::IMAGE_SCN_MEM_READ,

                                      SectionKind::getReadOnly());

  }

  // Debug info.

  COFFDebugSymbolsSection =

      Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE |

                                       COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                       COFF::IMAGE_SCN_MEM_READ),

                          SectionKind::getMetadata());

  COFFDebugTypesSection =

      Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE |

                                       COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                       COFF::IMAGE_SCN_MEM_READ),

                          SectionKind::getMetadata());

  DwarfAbbrevSection = Ctx->getCOFFSection(

      ".debug_abbrev",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_abbrev");

  DwarfInfoSection = Ctx->getCOFFSection(

      ".debug_info",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_info");

  DwarfLineSection = Ctx->getCOFFSection(

      ".debug_line",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_line");

  DwarfFrameSection = Ctx->getCOFFSection(

      ".debug_frame",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfPubNamesSection = Ctx->getCOFFSection(

      ".debug_pubnames",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfPubTypesSection = Ctx->getCOFFSection(

      ".debug_pubtypes",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfGnuPubNamesSection = Ctx->getCOFFSection(

      ".debug_gnu_pubnames",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfGnuPubTypesSection = Ctx->getCOFFSection(

      ".debug_gnu_pubtypes",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfStrSection = Ctx->getCOFFSection(

      ".debug_str",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "info_string");

  DwarfLocSection = Ctx->getCOFFSection(

      ".debug_loc",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_debug_loc");

  DwarfARangesSection = Ctx->getCOFFSection(

      ".debug_aranges",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfRangesSection = Ctx->getCOFFSection(

      ".debug_ranges",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "debug_range");

  DwarfMacinfoSection = Ctx->getCOFFSection(

      ".debug_macinfo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "debug_macinfo");

  DwarfInfoDWOSection = Ctx->getCOFFSection(

      ".debug_info.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_info_dwo");

  DwarfTypesDWOSection = Ctx->getCOFFSection(

      ".debug_types.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_types_dwo");

  DwarfAbbrevDWOSection = Ctx->getCOFFSection(

      ".debug_abbrev.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "section_abbrev_dwo");

  DwarfStrDWOSection = Ctx->getCOFFSection(

      ".debug_str.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "skel_string");

  DwarfLineDWOSection = Ctx->getCOFFSection(

      ".debug_line.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfLocDWOSection = Ctx->getCOFFSection(

      ".debug_loc.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "skel_loc");

  DwarfStrOffDWOSection = Ctx->getCOFFSection(

      ".debug_str_offsets.dwo",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfAddrSection = Ctx->getCOFFSection(

      ".debug_addr",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "addr_sec");

  DwarfCUIndexSection = Ctx->getCOFFSection(

      ".debug_cu_index",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfTUIndexSection = Ctx->getCOFFSection(

      ".debug_tu_index",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata());

  DwarfAccelNamesSection = Ctx->getCOFFSection(

      ".apple_names",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "names_begin");

  DwarfAccelNamespaceSection = Ctx->getCOFFSection(

      ".apple_namespaces",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "namespac_begin");

  DwarfAccelTypesSection = Ctx->getCOFFSection(

      ".apple_types",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "types_begin");

  DwarfAccelObjCSection = Ctx->getCOFFSection(

      ".apple_objc",

      COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

          COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getMetadata(), "objc_begin");

  DrectveSection = Ctx->getCOFFSection(

      ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE,

      SectionKind::getMetadata());

  PDataSection = Ctx->getCOFFSection(

      ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getData());

  XDataSection = Ctx->getCOFFSection(

      ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,

      SectionKind::getData());

  SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO,

                                      SectionKind::getMetadata());

  TLSDataSection = Ctx->getCOFFSection(

      ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |

                   COFF::IMAGE_SCN_MEM_WRITE,

      SectionKind::getData());

  StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps",

                                        COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |

                                            COFF::IMAGE_SCN_MEM_READ,

                                        SectionKind::getReadOnly());

}

void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple,

                                            MCContext &ctx) {

  Ctx = &ctx;

  // Common.

  CommDirectiveSupportsAlignment = true;

  SupportsWeakOmittedEHFrame = true;

  SupportsCompactUnwindWithoutEHFrame = false;

  OmitDwarfIfHaveCompactUnwind = false;

  PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =

      dwarf::DW_EH_PE_absptr;

  CompactUnwindDwarfEHFrameOnly = 0;

  EHFrameSection = nullptr;             // Created on demand.

  CompactUnwindSection = nullptr;       // Used only by selected targets.

  DwarfAccelNamesSection = nullptr;     // Used only by selected targets.

  DwarfAccelObjCSection = nullptr;      // Used only by selected targets.

  DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.

  DwarfAccelTypesSection = nullptr;     // Used only by selected targets.

  TT = TheTriple;

  switch (TT.getObjectFormat()) {

  case Triple::MachO:

    Env = IsMachO;

    initMachOMCObjectFileInfo(TT);

    break;

  case Triple::COFF:

    if (!TT.isOSWindows())

      report_fatal_error(

          "Cannot initialize MC for non-Windows COFF object files.");

    Env = IsCOFF;

    initCOFFMCObjectFileInfo(TT);

    break;

  case Triple::ELF:

    Env = IsELF;

    initELFMCObjectFileInfo(TT);

    break;

  case Triple::UnknownObjectFormat:

    report_fatal_error("Cannot initialize MC for unknown object file format.");

    break;

  }

}

MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {

  return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,

                            0, utostr(Hash));

}