Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 3398 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp b/gnu/llvm/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
new file mode 100644
index 00000000000..5b4ee5d2212
--- /dev/null
+++ b/gnu/llvm/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
@@ -0,0 +1,3398 @@
+//===-- ObjectFileELF.cpp ------------------------------------- -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ObjectFileELF.h"
+
+#include <algorithm>
+#include <cassert>
+#include <unordered_map>
+
+#include "lldb/Core/FileSpecList.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ModuleSpec.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/Section.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Host/LZMA.h"
+#include "lldb/Symbol/DWARFCallFrameInfo.h"
+#include "lldb/Symbol/SymbolContext.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Utility/ArchSpec.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/RangeMap.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/Stream.h"
+#include "lldb/Utility/Timer.h"
+#include "llvm/ADT/IntervalMap.h"
+#include "llvm/ADT/PointerUnion.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/BinaryFormat/ELF.h"
+#include "llvm/Object/Decompressor.h"
+#include "llvm/Support/ARMBuildAttributes.h"
+#include "llvm/Support/CRC.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/MipsABIFlags.h"
+
+#define CASE_AND_STREAM(s, def, width)                                         \
+  case def:                                                                    \
+    s->Printf("%-*s", width, #def);                                            \
+    break;
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace elf;
+using namespace llvm::ELF;
+
+namespace {
+
+// ELF note owner definitions
+const char *const LLDB_NT_OWNER_FREEBSD = "FreeBSD";
+const char *const LLDB_NT_OWNER_GNU = "GNU";
+const char *const LLDB_NT_OWNER_NETBSD = "NetBSD";
+const char *const LLDB_NT_OWNER_NETBSDCORE = "NetBSD-CORE";
+const char *const LLDB_NT_OWNER_OPENBSD = "OpenBSD";
+const char *const LLDB_NT_OWNER_ANDROID = "Android";
+const char *const LLDB_NT_OWNER_CORE = "CORE";
+const char *const LLDB_NT_OWNER_LINUX = "LINUX";
+
+// ELF note type definitions
+const elf_word LLDB_NT_FREEBSD_ABI_TAG = 0x01;
+const elf_word LLDB_NT_FREEBSD_ABI_SIZE = 4;
+
+const elf_word LLDB_NT_GNU_ABI_TAG = 0x01;
+const elf_word LLDB_NT_GNU_ABI_SIZE = 16;
+
+const elf_word LLDB_NT_GNU_BUILD_ID_TAG = 0x03;
+
+const elf_word LLDB_NT_NETBSD_IDENT_TAG = 1;
+const elf_word LLDB_NT_NETBSD_IDENT_DESCSZ = 4;
+const elf_word LLDB_NT_NETBSD_IDENT_NAMESZ = 7;
+const elf_word LLDB_NT_NETBSD_PROCINFO = 1;
+
+// GNU ABI note OS constants
+const elf_word LLDB_NT_GNU_ABI_OS_LINUX = 0x00;
+const elf_word LLDB_NT_GNU_ABI_OS_HURD = 0x01;
+const elf_word LLDB_NT_GNU_ABI_OS_SOLARIS = 0x02;
+
+//===----------------------------------------------------------------------===//
+/// \class ELFRelocation
+/// Generic wrapper for ELFRel and ELFRela.
+///
+/// This helper class allows us to parse both ELFRel and ELFRela relocation
+/// entries in a generic manner.
+class ELFRelocation {
+public:
+  /// Constructs an ELFRelocation entry with a personality as given by @p
+  /// type.
+  ///
+  /// \param type Either DT_REL or DT_RELA.  Any other value is invalid.
+  ELFRelocation(unsigned type);
+
+  ~ELFRelocation();
+
+  bool Parse(const lldb_private::DataExtractor &data, lldb::offset_t *offset);
+
+  static unsigned RelocType32(const ELFRelocation &rel);
+
+  static unsigned RelocType64(const ELFRelocation &rel);
+
+  static unsigned RelocSymbol32(const ELFRelocation &rel);
+
+  static unsigned RelocSymbol64(const ELFRelocation &rel);
+
+  static unsigned RelocOffset32(const ELFRelocation &rel);
+
+  static unsigned RelocOffset64(const ELFRelocation &rel);
+
+  static unsigned RelocAddend32(const ELFRelocation &rel);
+
+  static unsigned RelocAddend64(const ELFRelocation &rel);
+
+private:
+  typedef llvm::PointerUnion<ELFRel *, ELFRela *> RelocUnion;
+
+  RelocUnion reloc;
+};
+
+ELFRelocation::ELFRelocation(unsigned type) {
+  if (type == DT_REL || type == SHT_REL)
+    reloc = new ELFRel();
+  else if (type == DT_RELA || type == SHT_RELA)
+    reloc = new ELFRela();
+  else {
+    assert(false && "unexpected relocation type");
+    reloc = static_cast<ELFRel *>(nullptr);
+  }
+}
+
+ELFRelocation::~ELFRelocation() {
+  if (reloc.is<ELFRel *>())
+    delete reloc.get<ELFRel *>();
+  else
+    delete reloc.get<ELFRela *>();
+}
+
+bool ELFRelocation::Parse(const lldb_private::DataExtractor &data,
+                          lldb::offset_t *offset) {
+  if (reloc.is<ELFRel *>())
+    return reloc.get<ELFRel *>()->Parse(data, offset);
+  else
+    return reloc.get<ELFRela *>()->Parse(data, offset);
+}
+
+unsigned ELFRelocation::RelocType32(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return ELFRel::RelocType32(*rel.reloc.get<ELFRel *>());
+  else
+    return ELFRela::RelocType32(*rel.reloc.get<ELFRela *>());
+}
+
+unsigned ELFRelocation::RelocType64(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return ELFRel::RelocType64(*rel.reloc.get<ELFRel *>());
+  else
+    return ELFRela::RelocType64(*rel.reloc.get<ELFRela *>());
+}
+
+unsigned ELFRelocation::RelocSymbol32(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return ELFRel::RelocSymbol32(*rel.reloc.get<ELFRel *>());
+  else
+    return ELFRela::RelocSymbol32(*rel.reloc.get<ELFRela *>());
+}
+
+unsigned ELFRelocation::RelocSymbol64(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return ELFRel::RelocSymbol64(*rel.reloc.get<ELFRel *>());
+  else
+    return ELFRela::RelocSymbol64(*rel.reloc.get<ELFRela *>());
+}
+
+unsigned ELFRelocation::RelocOffset32(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return rel.reloc.get<ELFRel *>()->r_offset;
+  else
+    return rel.reloc.get<ELFRela *>()->r_offset;
+}
+
+unsigned ELFRelocation::RelocOffset64(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return rel.reloc.get<ELFRel *>()->r_offset;
+  else
+    return rel.reloc.get<ELFRela *>()->r_offset;
+}
+
+unsigned ELFRelocation::RelocAddend32(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return 0;
+  else
+    return rel.reloc.get<ELFRela *>()->r_addend;
+}
+
+unsigned ELFRelocation::RelocAddend64(const ELFRelocation &rel) {
+  if (rel.reloc.is<ELFRel *>())
+    return 0;
+  else
+    return rel.reloc.get<ELFRela *>()->r_addend;
+}
+
+} // end anonymous namespace
+
+static user_id_t SegmentID(size_t PHdrIndex) { return ~PHdrIndex; }
+
+bool ELFNote::Parse(const DataExtractor &data, lldb::offset_t *offset) {
+  // Read all fields.
+  if (data.GetU32(offset, &n_namesz, 3) == nullptr)
+    return false;
+
+  // The name field is required to be nul-terminated, and n_namesz includes the
+  // terminating nul in observed implementations (contrary to the ELF-64 spec).
+  // A special case is needed for cores generated by some older Linux versions,
+  // which write a note named "CORE" without a nul terminator and n_namesz = 4.
+  if (n_namesz == 4) {
+    char buf[4];
+    if (data.ExtractBytes(*offset, 4, data.GetByteOrder(), buf) != 4)
+      return false;
+    if (strncmp(buf, "CORE", 4) == 0) {
+      n_name = "CORE";
+      *offset += 4;
+      return true;
+    }
+  }
+
+  const char *cstr = data.GetCStr(offset, llvm::alignTo(n_namesz, 4));
+  if (cstr == nullptr) {
+    Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_SYMBOLS));
+    LLDB_LOGF(log, "Failed to parse note name lacking nul terminator");
+
+    return false;
+  }
+  n_name = cstr;
+  return true;
+}
+
+static uint32_t mipsVariantFromElfFlags (const elf::ELFHeader &header) {
+  const uint32_t mips_arch = header.e_flags & llvm::ELF::EF_MIPS_ARCH;
+  uint32_t endian = header.e_ident[EI_DATA];
+  uint32_t arch_variant = ArchSpec::eMIPSSubType_unknown;
+  uint32_t fileclass = header.e_ident[EI_CLASS];
+
+  // If there aren't any elf flags available (e.g core elf file) then return
+  // default
+  // 32 or 64 bit arch (without any architecture revision) based on object file's class.
+  if (header.e_type == ET_CORE) {
+    switch (fileclass) {
+    case llvm::ELF::ELFCLASS32:
+      return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32el
+                                     : ArchSpec::eMIPSSubType_mips32;
+    case llvm::ELF::ELFCLASS64:
+      return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64el
+                                     : ArchSpec::eMIPSSubType_mips64;
+    default:
+      return arch_variant;
+    }
+  }
+
+  switch (mips_arch) {
+  case llvm::ELF::EF_MIPS_ARCH_1:
+  case llvm::ELF::EF_MIPS_ARCH_2:
+  case llvm::ELF::EF_MIPS_ARCH_32:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32el
+                                   : ArchSpec::eMIPSSubType_mips32;
+  case llvm::ELF::EF_MIPS_ARCH_32R2:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32r2el
+                                   : ArchSpec::eMIPSSubType_mips32r2;
+  case llvm::ELF::EF_MIPS_ARCH_32R6:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32r6el
+                                   : ArchSpec::eMIPSSubType_mips32r6;
+  case llvm::ELF::EF_MIPS_ARCH_3:
+  case llvm::ELF::EF_MIPS_ARCH_4:
+  case llvm::ELF::EF_MIPS_ARCH_5:
+  case llvm::ELF::EF_MIPS_ARCH_64:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64el
+                                   : ArchSpec::eMIPSSubType_mips64;
+  case llvm::ELF::EF_MIPS_ARCH_64R2:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64r2el
+                                   : ArchSpec::eMIPSSubType_mips64r2;
+  case llvm::ELF::EF_MIPS_ARCH_64R6:
+    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64r6el
+                                   : ArchSpec::eMIPSSubType_mips64r6;
+  default:
+    break;
+  }
+
+  return arch_variant;
+}
+
+static uint32_t subTypeFromElfHeader(const elf::ELFHeader &header) {
+  if (header.e_machine == llvm::ELF::EM_MIPS)
+    return mipsVariantFromElfFlags(header);
+
+  return LLDB_INVALID_CPUTYPE;
+}
+
+char ObjectFileELF::ID;
+
+// Arbitrary constant used as UUID prefix for core files.
+const uint32_t ObjectFileELF::g_core_uuid_magic(0xE210C);
+
+// Static methods.
+void ObjectFileELF::Initialize() {
+  PluginManager::RegisterPlugin(GetPluginNameStatic(),
+                                GetPluginDescriptionStatic(), CreateInstance,
+                                CreateMemoryInstance, GetModuleSpecifications);
+}
+
+void ObjectFileELF::Terminate() {
+  PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+lldb_private::ConstString ObjectFileELF::GetPluginNameStatic() {
+  static ConstString g_name("elf");
+  return g_name;
+}
+
+const char *ObjectFileELF::GetPluginDescriptionStatic() {
+  return "ELF object file reader.";
+}
+
+ObjectFile *ObjectFileELF::CreateInstance(const lldb::ModuleSP &module_sp,
+                                          DataBufferSP &data_sp,
+                                          lldb::offset_t data_offset,
+                                          const lldb_private::FileSpec *file,
+                                          lldb::offset_t file_offset,
+                                          lldb::offset_t length) {
+  if (!data_sp) {
+    data_sp = MapFileData(*file, length, file_offset);
+    if (!data_sp)
+      return nullptr;
+    data_offset = 0;
+  }
+
+  assert(data_sp);
+
+  if (data_sp->GetByteSize() <= (llvm::ELF::EI_NIDENT + data_offset))
+    return nullptr;
+
+  const uint8_t *magic = data_sp->GetBytes() + data_offset;
+  if (!ELFHeader::MagicBytesMatch(magic))
+    return nullptr;
+
+  // Update the data to contain the entire file if it doesn't already
+  if (data_sp->GetByteSize() < length) {
+    data_sp = MapFileData(*file, length, file_offset);
+    if (!data_sp)
+      return nullptr;
+    data_offset = 0;
+    magic = data_sp->GetBytes();
+  }
+
+  unsigned address_size = ELFHeader::AddressSizeInBytes(magic);
+  if (address_size == 4 || address_size == 8) {
+    std::unique_ptr<ObjectFileELF> objfile_up(new ObjectFileELF(
+        module_sp, data_sp, data_offset, file, file_offset, length));
+    ArchSpec spec = objfile_up->GetArchitecture();
+    if (spec && objfile_up->SetModulesArchitecture(spec))
+      return objfile_up.release();
+  }
+
+  return nullptr;
+}
+
+ObjectFile *ObjectFileELF::CreateMemoryInstance(
+    const lldb::ModuleSP &module_sp, DataBufferSP &data_sp,
+    const lldb::ProcessSP &process_sp, lldb::addr_t header_addr) {
+  if (data_sp && data_sp->GetByteSize() > (llvm::ELF::EI_NIDENT)) {
+    const uint8_t *magic = data_sp->GetBytes();
+    if (ELFHeader::MagicBytesMatch(magic)) {
+      unsigned address_size = ELFHeader::AddressSizeInBytes(magic);
+      if (address_size == 4 || address_size == 8) {
+        std::unique_ptr<ObjectFileELF> objfile_up(
+            new ObjectFileELF(module_sp, data_sp, process_sp, header_addr));
+        ArchSpec spec = objfile_up->GetArchitecture();
+        if (spec && objfile_up->SetModulesArchitecture(spec))
+          return objfile_up.release();
+      }
+    }
+  }
+  return nullptr;
+}
+
+bool ObjectFileELF::MagicBytesMatch(DataBufferSP &data_sp,
+                                    lldb::addr_t data_offset,
+                                    lldb::addr_t data_length) {
+  if (data_sp &&
+      data_sp->GetByteSize() > (llvm::ELF::EI_NIDENT + data_offset)) {
+    const uint8_t *magic = data_sp->GetBytes() + data_offset;
+    return ELFHeader::MagicBytesMatch(magic);
+  }
+  return false;
+}
+
+static uint32_t calc_crc32(uint32_t init, const DataExtractor &data) {
+  return llvm::crc32(
+      init, llvm::makeArrayRef(data.GetDataStart(), data.GetByteSize()));
+}
+
+uint32_t ObjectFileELF::CalculateELFNotesSegmentsCRC32(
+    const ProgramHeaderColl &program_headers, DataExtractor &object_data) {
+
+  uint32_t core_notes_crc = 0;
+
+  for (const ELFProgramHeader &H : program_headers) {
+    if (H.p_type == llvm::ELF::PT_NOTE) {
+      const elf_off ph_offset = H.p_offset;
+      const size_t ph_size = H.p_filesz;
+
+      DataExtractor segment_data;
+      if (segment_data.SetData(object_data, ph_offset, ph_size) != ph_size) {
+        // The ELF program header contained incorrect data, probably corefile
+        // is incomplete or corrupted.
+        break;
+      }
+
+      core_notes_crc = calc_crc32(core_notes_crc, segment_data);
+    }
+  }
+
+  return core_notes_crc;
+}
+
+static const char *OSABIAsCString(unsigned char osabi_byte) {
+#define _MAKE_OSABI_CASE(x)                                                    \
+  case x:                                                                      \
+    return #x
+  switch (osabi_byte) {
+    _MAKE_OSABI_CASE(ELFOSABI_NONE);
+    _MAKE_OSABI_CASE(ELFOSABI_HPUX);
+    _MAKE_OSABI_CASE(ELFOSABI_NETBSD);
+    _MAKE_OSABI_CASE(ELFOSABI_GNU);
+    _MAKE_OSABI_CASE(ELFOSABI_HURD);
+    _MAKE_OSABI_CASE(ELFOSABI_SOLARIS);
+    _MAKE_OSABI_CASE(ELFOSABI_AIX);
+    _MAKE_OSABI_CASE(ELFOSABI_IRIX);
+    _MAKE_OSABI_CASE(ELFOSABI_FREEBSD);
+    _MAKE_OSABI_CASE(ELFOSABI_TRU64);
+    _MAKE_OSABI_CASE(ELFOSABI_MODESTO);
+    _MAKE_OSABI_CASE(ELFOSABI_OPENBSD);
+    _MAKE_OSABI_CASE(ELFOSABI_OPENVMS);
+    _MAKE_OSABI_CASE(ELFOSABI_NSK);
+    _MAKE_OSABI_CASE(ELFOSABI_AROS);
+    _MAKE_OSABI_CASE(ELFOSABI_FENIXOS);
+    _MAKE_OSABI_CASE(ELFOSABI_C6000_ELFABI);
+    _MAKE_OSABI_CASE(ELFOSABI_C6000_LINUX);
+    _MAKE_OSABI_CASE(ELFOSABI_ARM);
+    _MAKE_OSABI_CASE(ELFOSABI_STANDALONE);
+  default:
+    return "<unknown-osabi>";
+  }
+#undef _MAKE_OSABI_CASE
+}
+
+//
+// WARNING : This function is being deprecated
+// It's functionality has moved to ArchSpec::SetArchitecture This function is
+// only being kept to validate the move.
+//
+// TODO : Remove this function
+static bool GetOsFromOSABI(unsigned char osabi_byte,
+                           llvm::Triple::OSType &ostype) {
+  switch (osabi_byte) {
+  case ELFOSABI_AIX:
+    ostype = llvm::Triple::OSType::AIX;
+    break;
+  case ELFOSABI_FREEBSD:
+    ostype = llvm::Triple::OSType::FreeBSD;
+    break;
+  case ELFOSABI_GNU:
+    ostype = llvm::Triple::OSType::Linux;
+    break;
+  case ELFOSABI_NETBSD:
+    ostype = llvm::Triple::OSType::NetBSD;
+    break;
+  case ELFOSABI_OPENBSD:
+    ostype = llvm::Triple::OSType::OpenBSD;
+    break;
+  case ELFOSABI_SOLARIS:
+    ostype = llvm::Triple::OSType::Solaris;
+    break;
+  default:
+    ostype = llvm::Triple::OSType::UnknownOS;
+  }
+  return ostype != llvm::Triple::OSType::UnknownOS;
+}
+
+size_t ObjectFileELF::GetModuleSpecifications(
+    const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
+    lldb::offset_t data_offset, lldb::offset_t file_offset,
+    lldb::offset_t length, lldb_private::ModuleSpecList &specs) {
+  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES));
+
+  const size_t initial_count = specs.GetSize();
+
+  if (ObjectFileELF::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) {
+    DataExtractor data;
+    data.SetData(data_sp);
+    elf::ELFHeader header;
+    lldb::offset_t header_offset = data_offset;
+    if (header.Parse(data, &header_offset)) {
+      if (data_sp) {
+        ModuleSpec spec(file);
+
+        const uint32_t sub_type = subTypeFromElfHeader(header);
+        spec.GetArchitecture().SetArchitecture(
+            eArchTypeELF, header.e_machine, sub_type, header.e_ident[EI_OSABI]);
+
+        if (spec.GetArchitecture().IsValid()) {
+          llvm::Triple::OSType ostype;
+          llvm::Triple::VendorType vendor;
+          llvm::Triple::OSType spec_ostype =
+              spec.GetArchitecture().GetTriple().getOS();
+
+          LLDB_LOGF(log, "ObjectFileELF::%s file '%s' module OSABI: %s",
+                    __FUNCTION__, file.GetPath().c_str(),
+                    OSABIAsCString(header.e_ident[EI_OSABI]));
+
+          // SetArchitecture should have set the vendor to unknown
+          vendor = spec.GetArchitecture().GetTriple().getVendor();
+          assert(vendor == llvm::Triple::UnknownVendor);
+          UNUSED_IF_ASSERT_DISABLED(vendor);
+
+          //
+          // Validate it is ok to remove GetOsFromOSABI
+          GetOsFromOSABI(header.e_ident[EI_OSABI], ostype);
+          assert(spec_ostype == ostype);
+          if (spec_ostype != llvm::Triple::OSType::UnknownOS) {
+            LLDB_LOGF(log,
+                      "ObjectFileELF::%s file '%s' set ELF module OS type "
+                      "from ELF header OSABI.",
+                      __FUNCTION__, file.GetPath().c_str());
+          }
+
+          data_sp = MapFileData(file, -1, file_offset);
+          if (data_sp)
+            data.SetData(data_sp);
+          // In case there is header extension in the section #0, the header we
+          // parsed above could have sentinel values for e_phnum, e_shnum, and
+          // e_shstrndx.  In this case we need to reparse the header with a
+          // bigger data source to get the actual values.
+          if (header.HasHeaderExtension()) {
+            lldb::offset_t header_offset = data_offset;
+            header.Parse(data, &header_offset);
+          }
+
+          uint32_t gnu_debuglink_crc = 0;
+          std::string gnu_debuglink_file;
+          SectionHeaderColl section_headers;
+          lldb_private::UUID &uuid = spec.GetUUID();
+
+          GetSectionHeaderInfo(section_headers, data, header, uuid,
+                               gnu_debuglink_file, gnu_debuglink_crc,
+                               spec.GetArchitecture());
+
+          llvm::Triple &spec_triple = spec.GetArchitecture().GetTriple();
+
+          LLDB_LOGF(log,
+                    "ObjectFileELF::%s file '%s' module set to triple: %s "
+                    "(architecture %s)",
+                    __FUNCTION__, file.GetPath().c_str(),
+                    spec_triple.getTriple().c_str(),
+                    spec.GetArchitecture().GetArchitectureName());
+
+          if (!uuid.IsValid()) {
+            uint32_t core_notes_crc = 0;
+
+            if (!gnu_debuglink_crc) {
+              static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
+              lldb_private::Timer scoped_timer(
+                  func_cat,
+                  "Calculating module crc32 %s with size %" PRIu64 " KiB",
+                  file.GetLastPathComponent().AsCString(),
+                  (FileSystem::Instance().GetByteSize(file) - file_offset) /
+                      1024);
+
+              // For core files - which usually don't happen to have a
+              // gnu_debuglink, and are pretty bulky - calculating whole
+              // contents crc32 would be too much of luxury.  Thus we will need
+              // to fallback to something simpler.
+              if (header.e_type == llvm::ELF::ET_CORE) {
+                ProgramHeaderColl program_headers;
+                GetProgramHeaderInfo(program_headers, data, header);
+
+                core_notes_crc =
+                    CalculateELFNotesSegmentsCRC32(program_headers, data);
+              } else {
+                gnu_debuglink_crc = calc_crc32(0, data);
+              }
+            }
+            using u32le = llvm::support::ulittle32_t;
+            if (gnu_debuglink_crc) {
+              // Use 4 bytes of crc from the .gnu_debuglink section.
+              u32le data(gnu_debuglink_crc);
+              uuid = UUID::fromData(&data, sizeof(data));
+            } else if (core_notes_crc) {
+              // Use 8 bytes - first 4 bytes for *magic* prefix, mainly to make
+              // it look different form .gnu_debuglink crc followed by 4 bytes
+              // of note segments crc.
+              u32le data[] = {u32le(g_core_uuid_magic), u32le(core_notes_crc)};
+              uuid = UUID::fromData(data, sizeof(data));
+            }
+          }
+
+          specs.Append(spec);
+        }
+      }
+    }
+  }
+
+  return specs.GetSize() - initial_count;
+}
+
+// PluginInterface protocol
+lldb_private::ConstString ObjectFileELF::GetPluginName() {
+  return GetPluginNameStatic();
+}
+
+uint32_t ObjectFileELF::GetPluginVersion() { return m_plugin_version; }
+// ObjectFile protocol
+
+ObjectFileELF::ObjectFileELF(const lldb::ModuleSP &module_sp,
+                             DataBufferSP &data_sp, lldb::offset_t data_offset,
+                             const FileSpec *file, lldb::offset_t file_offset,
+                             lldb::offset_t length)
+    : ObjectFile(module_sp, file, file_offset, length, data_sp, data_offset) {
+  if (file)
+    m_file = *file;
+}
+
+ObjectFileELF::ObjectFileELF(const lldb::ModuleSP &module_sp,
+                             DataBufferSP &header_data_sp,
+                             const lldb::ProcessSP &process_sp,
+                             addr_t header_addr)
+    : ObjectFile(module_sp, process_sp, header_addr, header_data_sp) {}
+
+bool ObjectFileELF::IsExecutable() const {
+  return ((m_header.e_type & ET_EXEC) != 0) || (m_header.e_entry != 0);
+}
+
+bool ObjectFileELF::SetLoadAddress(Target &target, lldb::addr_t value,
+                                   bool value_is_offset) {
+  ModuleSP module_sp = GetModule();
+  if (module_sp) {
+    size_t num_loaded_sections = 0;
+    SectionList *section_list = GetSectionList();
+    if (section_list) {
+      if (!value_is_offset) {
+        addr_t base = GetBaseAddress().GetFileAddress();
+        if (base == LLDB_INVALID_ADDRESS)
+          return false;
+        value -= base;
+      }
+
+      const size_t num_sections = section_list->GetSize();
+      size_t sect_idx = 0;
+
+      for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) {
+        // Iterate through the object file sections to find all of the sections
+        // that have SHF_ALLOC in their flag bits.
+        SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx));
+        if (section_sp->Test(SHF_ALLOC) ||
+            section_sp->GetType() == eSectionTypeContainer) {
+          lldb::addr_t load_addr = section_sp->GetFileAddress();
+          // We don't want to update the load address of a section with type
+          // eSectionTypeAbsoluteAddress as they already have the absolute load
+          // address already specified
+          if (section_sp->GetType() != eSectionTypeAbsoluteAddress)
+            load_addr += value;
+
+          // On 32-bit systems the load address have to fit into 4 bytes. The
+          // rest of the bytes are the overflow from the addition.
+          if (GetAddressByteSize() == 4)
+            load_addr &= 0xFFFFFFFF;
+
+          if (target.GetSectionLoadList().SetSectionLoadAddress(section_sp,
+                                                                load_addr))
+            ++num_loaded_sections;
+        }
+      }
+      return num_loaded_sections > 0;
+    }
+  }
+  return false;
+}
+
+ByteOrder ObjectFileELF::GetByteOrder() const {
+  if (m_header.e_ident[EI_DATA] == ELFDATA2MSB)
+    return eByteOrderBig;
+  if (m_header.e_ident[EI_DATA] == ELFDATA2LSB)
+    return eByteOrderLittle;
+  return eByteOrderInvalid;
+}
+
+uint32_t ObjectFileELF::GetAddressByteSize() const {
+  return m_data.GetAddressByteSize();
+}
+
+AddressClass ObjectFileELF::GetAddressClass(addr_t file_addr) {
+  Symtab *symtab = GetSymtab();
+  if (!symtab)
+    return AddressClass::eUnknown;
+
+  // The address class is determined based on the symtab. Ask it from the
+  // object file what contains the symtab information.
+  ObjectFile *symtab_objfile = symtab->GetObjectFile();
+  if (symtab_objfile != nullptr && symtab_objfile != this)
+    return symtab_objfile->GetAddressClass(file_addr);
+
+  auto res = ObjectFile::GetAddressClass(file_addr);
+  if (res != AddressClass::eCode)
+    return res;
+
+  auto ub = m_address_class_map.upper_bound(file_addr);
+  if (ub == m_address_class_map.begin()) {
+    // No entry in the address class map before the address. Return default
+    // address class for an address in a code section.
+    return AddressClass::eCode;
+  }
+
+  // Move iterator to the address class entry preceding address
+  --ub;
+
+  return ub->second;
+}
+
+size_t ObjectFileELF::SectionIndex(const SectionHeaderCollIter &I) {
+  return std::distance(m_section_headers.begin(), I);
+}
+
+size_t ObjectFileELF::SectionIndex(const SectionHeaderCollConstIter &I) const {
+  return std::distance(m_section_headers.begin(), I);
+}
+
+bool ObjectFileELF::ParseHeader() {
+  lldb::offset_t offset = 0;
+  return m_header.Parse(m_data, &offset);
+}
+
+UUID ObjectFileELF::GetUUID() {
+  // Need to parse the section list to get the UUIDs, so make sure that's been
+  // done.
+  if (!ParseSectionHeaders() && GetType() != ObjectFile::eTypeCoreFile)
+    return UUID();
+
+  if (!m_uuid) {
+    using u32le = llvm::support::ulittle32_t;
+    if (GetType() == ObjectFile::eTypeCoreFile) {
+      uint32_t core_notes_crc = 0;
+
+      if (!ParseProgramHeaders())
+        return UUID();
+
+      core_notes_crc =
+          CalculateELFNotesSegmentsCRC32(m_program_headers, m_data);
+
+      if (core_notes_crc) {
+        // Use 8 bytes - first 4 bytes for *magic* prefix, mainly to make it
+        // look different form .gnu_debuglink crc - followed by 4 bytes of note
+        // segments crc.
+        u32le data[] = {u32le(g_core_uuid_magic), u32le(core_notes_crc)};
+        m_uuid = UUID::fromData(data, sizeof(data));
+      }
+    } else {
+      if (!m_gnu_debuglink_crc)
+        m_gnu_debuglink_crc = calc_crc32(0, m_data);
+      if (m_gnu_debuglink_crc) {
+        // Use 4 bytes of crc from the .gnu_debuglink section.
+        u32le data(m_gnu_debuglink_crc);
+        m_uuid = UUID::fromData(&data, sizeof(data));
+      }
+    }
+  }
+
+  return m_uuid;
+}
+
+llvm::Optional<FileSpec> ObjectFileELF::GetDebugLink() {
+  if (m_gnu_debuglink_file.empty())
+    return llvm::None;
+  return FileSpec(m_gnu_debuglink_file);
+}
+
+uint32_t ObjectFileELF::GetDependentModules(FileSpecList &files) {
+  size_t num_modules = ParseDependentModules();
+  uint32_t num_specs = 0;
+
+  for (unsigned i = 0; i < num_modules; ++i) {
+    if (files.AppendIfUnique(m_filespec_up->GetFileSpecAtIndex(i)))
+      num_specs++;
+  }
+
+  return num_specs;
+}
+
+Address ObjectFileELF::GetImageInfoAddress(Target *target) {
+  if (!ParseDynamicSymbols())
+    return Address();
+
+  SectionList *section_list = GetSectionList();
+  if (!section_list)
+    return Address();
+
+  // Find the SHT_DYNAMIC (.dynamic) section.
+  SectionSP dynsym_section_sp(
+      section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true));
+  if (!dynsym_section_sp)
+    return Address();
+  assert(dynsym_section_sp->GetObjectFile() == this);
+
+  user_id_t dynsym_id = dynsym_section_sp->GetID();
+  const ELFSectionHeaderInfo *dynsym_hdr = GetSectionHeaderByIndex(dynsym_id);
+  if (!dynsym_hdr)
+    return Address();
+
+  for (size_t i = 0; i < m_dynamic_symbols.size(); ++i) {
+    ELFDynamic &symbol = m_dynamic_symbols[i];
+
+    if (symbol.d_tag == DT_DEBUG) {
+      // Compute the offset as the number of previous entries plus the size of
+      // d_tag.
+      addr_t offset = i * dynsym_hdr->sh_entsize + GetAddressByteSize();
+      return Address(dynsym_section_sp, offset);
+    }
+    // MIPS executables uses DT_MIPS_RLD_MAP_REL to support PIE. DT_MIPS_RLD_MAP
+    // exists in non-PIE.
+    else if ((symbol.d_tag == DT_MIPS_RLD_MAP ||
+              symbol.d_tag == DT_MIPS_RLD_MAP_REL) &&
+             target) {
+      addr_t offset = i * dynsym_hdr->sh_entsize + GetAddressByteSize();
+      addr_t dyn_base = dynsym_section_sp->GetLoadBaseAddress(target);
+      if (dyn_base == LLDB_INVALID_ADDRESS)
+        return Address();
+
+      Status error;
+      if (symbol.d_tag == DT_MIPS_RLD_MAP) {
+        // DT_MIPS_RLD_MAP tag stores an absolute address of the debug pointer.
+        Address addr;
+        if (target->ReadPointerFromMemory(dyn_base + offset, false, error,
+                                          addr))
+          return addr;
+      }
+      if (symbol.d_tag == DT_MIPS_RLD_MAP_REL) {
+        // DT_MIPS_RLD_MAP_REL tag stores the offset to the debug pointer,
+        // relative to the address of the tag.
+        uint64_t rel_offset;
+        rel_offset = target->ReadUnsignedIntegerFromMemory(
+            dyn_base + offset, false, GetAddressByteSize(), UINT64_MAX, error);
+        if (error.Success() && rel_offset != UINT64_MAX) {
+          Address addr;
+          addr_t debug_ptr_address =
+              dyn_base + (offset - GetAddressByteSize()) + rel_offset;
+          addr.SetOffset(debug_ptr_address);
+          return addr;
+        }
+      }
+    }
+  }
+
+  return Address();
+}
+
+lldb_private::Address ObjectFileELF::GetEntryPointAddress() {
+  if (m_entry_point_address.IsValid())
+    return m_entry_point_address;
+
+  if (!ParseHeader() || !IsExecutable())
+    return m_entry_point_address;
+
+  SectionList *section_list = GetSectionList();
+  addr_t offset = m_header.e_entry;
+
+  if (!section_list)
+    m_entry_point_address.SetOffset(offset);
+  else
+    m_entry_point_address.ResolveAddressUsingFileSections(offset, section_list);
+  return m_entry_point_address;
+}
+
+Address ObjectFileELF::GetBaseAddress() {
+  for (const auto &EnumPHdr : llvm::enumerate(ProgramHeaders())) {
+    const ELFProgramHeader &H = EnumPHdr.value();
+    if (H.p_type != PT_LOAD)
+      continue;
+
+    return Address(
+        GetSectionList()->FindSectionByID(SegmentID(EnumPHdr.index())), 0);
+  }
+  return LLDB_INVALID_ADDRESS;
+}
+
+// ParseDependentModules
+size_t ObjectFileELF::ParseDependentModules() {
+  if (m_filespec_up)
+    return m_filespec_up->GetSize();
+
+  m_filespec_up.reset(new FileSpecList());
+
+  if (!ParseSectionHeaders())
+    return 0;
+
+  SectionList *section_list = GetSectionList();
+  if (!section_list)
+    return 0;
+
+  // Find the SHT_DYNAMIC section.
+  Section *dynsym =
+      section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true)
+          .get();
+  if (!dynsym)
+    return 0;
+  assert(dynsym->GetObjectFile() == this);
+
+  const ELFSectionHeaderInfo *header = GetSectionHeaderByIndex(dynsym->GetID());
+  if (!header)
+    return 0;
+  // sh_link: section header index of string table used by entries in the
+  // section.
+  Section *dynstr = section_list->FindSectionByID(header->sh_link).get();
+  if (!dynstr)
+    return 0;
+
+  DataExtractor dynsym_data;
+  DataExtractor dynstr_data;
+  if (ReadSectionData(dynsym, dynsym_data) &&
+      ReadSectionData(dynstr, dynstr_data)) {
+    ELFDynamic symbol;
+    const lldb::offset_t section_size = dynsym_data.GetByteSize();
+    lldb::offset_t offset = 0;
+
+    // The only type of entries we are concerned with are tagged DT_NEEDED,
+    // yielding the name of a required library.
+    while (offset < section_size) {
+      if (!symbol.Parse(dynsym_data, &offset))
+        break;
+
+      if (symbol.d_tag != DT_NEEDED)
+        continue;
+
+      uint32_t str_index = static_cast<uint32_t>(symbol.d_val);
+      const char *lib_name = dynstr_data.PeekCStr(str_index);
+      FileSpec file_spec(lib_name);
+      FileSystem::Instance().Resolve(file_spec);
+      m_filespec_up->Append(file_spec);
+    }
+  }
+
+  return m_filespec_up->GetSize();
+}
+
+// GetProgramHeaderInfo
+size_t ObjectFileELF::GetProgramHeaderInfo(ProgramHeaderColl &program_headers,
+                                           DataExtractor &object_data,
+                                           const ELFHeader &header) {
+  // We have already parsed the program headers
+  if (!program_headers.empty())
+    return program_headers.size();
+
+  // If there are no program headers to read we are done.
+  if (header.e_phnum == 0)
+    return 0;
+
+  program_headers.resize(header.e_phnum);
+  if (program_headers.size() != header.e_phnum)
+    return 0;
+
+  const size_t ph_size = header.e_phnum * header.e_phentsize;
+  const elf_off ph_offset = header.e_phoff;
+  DataExtractor data;
+  if (data.SetData(object_data, ph_offset, ph_size) != ph_size)
+    return 0;
+
+  uint32_t idx;
+  lldb::offset_t offset;
+  for (idx = 0, offset = 0; idx < header.e_phnum; ++idx) {
+    if (!program_headers[idx].Parse(data, &offset))
+      break;
+  }
+
+  if (idx < program_headers.size())
+    program_headers.resize(idx);
+
+  return program_headers.size();
+}
+
+// ParseProgramHeaders
+bool ObjectFileELF::ParseProgramHeaders() {
+  return GetProgramHeaderInfo(m_program_headers, m_data, m_header) != 0;
+}
+
+lldb_private::Status
+ObjectFileELF::RefineModuleDetailsFromNote(lldb_private::DataExtractor &data,
+                                           lldb_private::ArchSpec &arch_spec,
+                                           lldb_private::UUID &uuid) {
+  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES));
+  Status error;
+
+  lldb::offset_t offset = 0;
+
+  while (true) {
+    // Parse the note header.  If this fails, bail out.
+    const lldb::offset_t note_offset = offset;
+    ELFNote note = ELFNote();
+    if (!note.Parse(data, &offset)) {
+      // We're done.
+      return error;
+    }
+
+    LLDB_LOGF(log, "ObjectFileELF::%s parsing note name='%s', type=%" PRIu32,
+              __FUNCTION__, note.n_name.c_str(), note.n_type);
+
+    // Process FreeBSD ELF notes.
+    if ((note.n_name == LLDB_NT_OWNER_FREEBSD) &&
+        (note.n_type == LLDB_NT_FREEBSD_ABI_TAG) &&
+        (note.n_descsz == LLDB_NT_FREEBSD_ABI_SIZE)) {
+      // Pull out the min version info.
+      uint32_t version_info;
+      if (data.GetU32(&offset, &version_info, 1) == nullptr) {
+        error.SetErrorString("failed to read FreeBSD ABI note payload");
+        return error;
+      }
+
+      // Convert the version info into a major/minor number.
+      const uint32_t version_major = version_info / 100000;
+      const uint32_t version_minor = (version_info / 1000) % 100;
+
+      char os_name[32];
+      snprintf(os_name, sizeof(os_name), "freebsd%" PRIu32 ".%" PRIu32,
+               version_major, version_minor);
+
+      // Set the elf OS version to FreeBSD.  Also clear the vendor.
+      arch_spec.GetTriple().setOSName(os_name);
+      arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);
+
+      LLDB_LOGF(log,
+                "ObjectFileELF::%s detected FreeBSD %" PRIu32 ".%" PRIu32
+                ".%" PRIu32,
+                __FUNCTION__, version_major, version_minor,
+                static_cast<uint32_t>(version_info % 1000));
+    }
+    // Process GNU ELF notes.
+    else if (note.n_name == LLDB_NT_OWNER_GNU) {
+      switch (note.n_type) {
+      case LLDB_NT_GNU_ABI_TAG:
+        if (note.n_descsz == LLDB_NT_GNU_ABI_SIZE) {
+          // Pull out the min OS version supporting the ABI.
+          uint32_t version_info[4];
+          if (data.GetU32(&offset, &version_info[0], note.n_descsz / 4) ==
+              nullptr) {
+            error.SetErrorString("failed to read GNU ABI note payload");
+            return error;
+          }
+
+          // Set the OS per the OS field.
+          switch (version_info[0]) {
+          case LLDB_NT_GNU_ABI_OS_LINUX:
+            arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+            arch_spec.GetTriple().setVendor(
+                llvm::Triple::VendorType::UnknownVendor);
+            LLDB_LOGF(log,
+                      "ObjectFileELF::%s detected Linux, min version %" PRIu32
+                      ".%" PRIu32 ".%" PRIu32,
+                      __FUNCTION__, version_info[1], version_info[2],
+                      version_info[3]);
+            // FIXME we have the minimal version number, we could be propagating
+            // that.  version_info[1] = OS Major, version_info[2] = OS Minor,
+            // version_info[3] = Revision.
+            break;
+          case LLDB_NT_GNU_ABI_OS_HURD:
+            arch_spec.GetTriple().setOS(llvm::Triple::OSType::UnknownOS);
+            arch_spec.GetTriple().setVendor(
+                llvm::Triple::VendorType::UnknownVendor);
+            LLDB_LOGF(log,
+                      "ObjectFileELF::%s detected Hurd (unsupported), min "
+                      "version %" PRIu32 ".%" PRIu32 ".%" PRIu32,
+                      __FUNCTION__, version_info[1], version_info[2],
+                      version_info[3]);
+            break;
+          case LLDB_NT_GNU_ABI_OS_SOLARIS:
+            arch_spec.GetTriple().setOS(llvm::Triple::OSType::Solaris);
+            arch_spec.GetTriple().setVendor(
+                llvm::Triple::VendorType::UnknownVendor);
+            LLDB_LOGF(log,
+                      "ObjectFileELF::%s detected Solaris, min version %" PRIu32
+                      ".%" PRIu32 ".%" PRIu32,
+                      __FUNCTION__, version_info[1], version_info[2],
+                      version_info[3]);
+            break;
+          default:
+            LLDB_LOGF(log,
+                      "ObjectFileELF::%s unrecognized OS in note, id %" PRIu32
+                      ", min version %" PRIu32 ".%" PRIu32 ".%" PRIu32,
+                      __FUNCTION__, version_info[0], version_info[1],
+                      version_info[2], version_info[3]);
+            break;
+          }
+        }
+        break;
+
+      case LLDB_NT_GNU_BUILD_ID_TAG:
+        // Only bother processing this if we don't already have the uuid set.
+        if (!uuid.IsValid()) {
+          // 16 bytes is UUID|MD5, 20 bytes is SHA1. Other linkers may produce a
+          // build-id of a different length. Accept it as long as it's at least
+          // 4 bytes as it will be better than our own crc32.
+          if (note.n_descsz >= 4) {
+            if (const uint8_t *buf = data.PeekData(offset, note.n_descsz)) {
+              // Save the build id as the UUID for the module.
+              uuid = UUID::fromData(buf, note.n_descsz);
+            } else {
+              error.SetErrorString("failed to read GNU_BUILD_ID note payload");
+              return error;
+            }
+          }
+        }
+        break;
+      }
+      if (arch_spec.IsMIPS() &&
+          arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS)
+        // The note.n_name == LLDB_NT_OWNER_GNU is valid for Linux platform
+        arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+    }
+    // Process NetBSD ELF executables and shared libraries
+    else if ((note.n_name == LLDB_NT_OWNER_NETBSD) &&
+             (note.n_type == LLDB_NT_NETBSD_IDENT_TAG) &&
+             (note.n_descsz == LLDB_NT_NETBSD_IDENT_DESCSZ) &&
+             (note.n_namesz == LLDB_NT_NETBSD_IDENT_NAMESZ)) {
+      // Pull out the version info.
+      uint32_t version_info;
+      if (data.GetU32(&offset, &version_info, 1) == nullptr) {
+        error.SetErrorString("failed to read NetBSD ABI note payload");
+        return error;
+      }
+      // Convert the version info into a major/minor/patch number.
+      //     #define __NetBSD_Version__ MMmmrrpp00
+      //
+      //     M = major version
+      //     m = minor version; a minor number of 99 indicates current.
+      //     r = 0 (since NetBSD 3.0 not used)
+      //     p = patchlevel
+      const uint32_t version_major = version_info / 100000000;
+      const uint32_t version_minor = (version_info % 100000000) / 1000000;
+      const uint32_t version_patch = (version_info % 10000) / 100;
+      // Set the elf OS version to NetBSD.  Also clear the vendor.
+      arch_spec.GetTriple().setOSName(
+          llvm::formatv("netbsd{0}.{1}.{2}", version_major, version_minor,
+                        version_patch).str());
+      arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);
+    }
+    // Process NetBSD ELF core(5) notes
+    else if ((note.n_name == LLDB_NT_OWNER_NETBSDCORE) &&
+             (note.n_type == LLDB_NT_NETBSD_PROCINFO)) {
+      // Set the elf OS version to NetBSD.  Also clear the vendor.
+      arch_spec.GetTriple().setOS(llvm::Triple::OSType::NetBSD);
+      arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);
+    }
+    // Process OpenBSD ELF notes.
+    else if (note.n_name == LLDB_NT_OWNER_OPENBSD) {
+      // Set the elf OS version to OpenBSD.  Also clear the vendor.
+      arch_spec.GetTriple().setOS(llvm::Triple::OSType::OpenBSD);
+      arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);
+    } else if (note.n_name == LLDB_NT_OWNER_ANDROID) {
+      arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+      arch_spec.GetTriple().setEnvironment(
+          llvm::Triple::EnvironmentType::Android);
+    } else if (note.n_name == LLDB_NT_OWNER_LINUX) {
+      // This is sometimes found in core files and usually contains extended
+      // register info
+      arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+    } else if (note.n_name == LLDB_NT_OWNER_CORE) {
+      // Parse the NT_FILE to look for stuff in paths to shared libraries As
+      // the contents look like this in a 64 bit ELF core file: count     =
+      // 0x000000000000000a (10) page_size = 0x0000000000001000 (4096) Index
+      // start              end                file_ofs           path =====
+      // 0x0000000000401000 0x0000000000000000 /tmp/a.out [  1]
+      // 0x0000000000600000 0x0000000000601000 0x0000000000000000 /tmp/a.out [
+      // 2] 0x0000000000601000 0x0000000000602000 0x0000000000000001 /tmp/a.out
+      // [  3] 0x00007fa79c9ed000 0x00007fa79cba8000 0x0000000000000000
+      // /lib/x86_64-linux-gnu/libc-2.19.so [  4] 0x00007fa79cba8000
+      // 0x00007fa79cda7000 0x00000000000001bb /lib/x86_64-linux-
+      // gnu/libc-2.19.so [  5] 0x00007fa79cda7000 0x00007fa79cdab000
+      // 0x00000000000001ba /lib/x86_64-linux-gnu/libc-2.19.so [  6]
+      // 0x00007fa79cdab000 0x00007fa79cdad000 0x00000000000001be /lib/x86_64
+      // -linux-gnu/libc-2.19.so [  7] 0x00007fa79cdb2000 0x00007fa79cdd5000
+      // 0x0000000000000000 /lib/x86_64-linux-gnu/ld-2.19.so [  8]
+      // 0x00007fa79cfd4000 0x00007fa79cfd5000 0x0000000000000022 /lib/x86_64
+      // -linux-gnu/ld-2.19.so [  9] 0x00007fa79cfd5000 0x00007fa79cfd6000
+      // 0x0000000000000023 /lib/x86_64-linux-gnu/ld-2.19.so In the 32 bit ELFs
+      // the count, page_size, start, end, file_ofs are uint32_t For reference:
+      // see readelf source code (in binutils).
+      if (note.n_type == NT_FILE) {
+        uint64_t count = data.GetAddress(&offset);
+        const char *cstr;
+        data.GetAddress(&offset); // Skip page size
+        offset += count * 3 *
+                  data.GetAddressByteSize(); // Skip all start/end/file_ofs
+        for (size_t i = 0; i < count; ++i) {
+          cstr = data.GetCStr(&offset);
+          if (cstr == nullptr) {
+            error.SetErrorStringWithFormat("ObjectFileELF::%s trying to read "
+                                           "at an offset after the end "
+                                           "(GetCStr returned nullptr)",
+                                           __FUNCTION__);
+            return error;
+          }
+          llvm::StringRef path(cstr);
+          if (path.contains("/lib/x86_64-linux-gnu") || path.contains("/lib/i386-linux-gnu")) {
+            arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+            break;
+          }
+        }
+        if (arch_spec.IsMIPS() &&
+            arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS)
+          // In case of MIPSR6, the LLDB_NT_OWNER_GNU note is missing for some
+          // cases (e.g. compile with -nostdlib) Hence set OS to Linux
+          arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
+      }
+    }
+
+    // Calculate the offset of the next note just in case "offset" has been
+    // used to poke at the contents of the note data
+    offset = note_offset + note.GetByteSize();
+  }
+
+  return error;
+}
+
+void ObjectFileELF::ParseARMAttributes(DataExtractor &data, uint64_t length,
+                                       ArchSpec &arch_spec) {
+  lldb::offset_t Offset = 0;
+
+  uint8_t FormatVersion = data.GetU8(&Offset);
+  if (FormatVersion != llvm::ARMBuildAttrs::Format_Version)
+    return;
+
+  Offset = Offset + sizeof(uint32_t); // Section Length
+  llvm::StringRef VendorName = data.GetCStr(&Offset);
+
+  if (VendorName != "aeabi")
+    return;
+
+  if (arch_spec.GetTriple().getEnvironment() ==
+      llvm::Triple::UnknownEnvironment)
+    arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI);
+
+  while (Offset < length) {
+    uint8_t Tag = data.GetU8(&Offset);
+    uint32_t Size = data.GetU32(&Offset);
+
+    if (Tag != llvm::ARMBuildAttrs::File || Size == 0)
+      continue;
+
+    while (Offset < length) {
+      uint64_t Tag = data.GetULEB128(&Offset);
+      switch (Tag) {
+      default:
+        if (Tag < 32)
+          data.GetULEB128(&Offset);
+        else if (Tag % 2 == 0)
+          data.GetULEB128(&Offset);
+        else
+          data.GetCStr(&Offset);
+
+        break;
+
+      case llvm::ARMBuildAttrs::CPU_raw_name:
+      case llvm::ARMBuildAttrs::CPU_name:
+        data.GetCStr(&Offset);
+
+        break;
+
+      case llvm::ARMBuildAttrs::ABI_VFP_args: {
+        uint64_t VFPArgs = data.GetULEB128(&Offset);
+
+        if (VFPArgs == llvm::ARMBuildAttrs::BaseAAPCS) {
+          if (arch_spec.GetTriple().getEnvironment() ==
+                  llvm::Triple::UnknownEnvironment ||
+              arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABIHF)
+            arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI);
+
+          arch_spec.SetFlags(ArchSpec::eARM_abi_soft_float);
+        } else if (VFPArgs == llvm::ARMBuildAttrs::HardFPAAPCS) {
+          if (arch_spec.GetTriple().getEnvironment() ==
+                  llvm::Triple::UnknownEnvironment ||
+              arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABI)
+            arch_spec.GetTriple().setEnvironment(llvm::Triple::EABIHF);
+
+          arch_spec.SetFlags(ArchSpec::eARM_abi_hard_float);
+        }
+
+        break;
+      }
+      }
+    }
+  }
+}
+
+// GetSectionHeaderInfo
+size_t ObjectFileELF::GetSectionHeaderInfo(SectionHeaderColl &section_headers,
+                                           DataExtractor &object_data,
+                                           const elf::ELFHeader &header,
+                                           lldb_private::UUID &uuid,
+                                           std::string &gnu_debuglink_file,
+                                           uint32_t &gnu_debuglink_crc,
+                                           ArchSpec &arch_spec) {
+  // Don't reparse the section headers if we already did that.
+  if (!section_headers.empty())
+    return section_headers.size();
+
+  // Only initialize the arch_spec to okay defaults if they're not already set.
+  // We'll refine this with note data as we parse the notes.
+  if (arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS) {
+    llvm::Triple::OSType ostype;
+    llvm::Triple::OSType spec_ostype;
+    const uint32_t sub_type = subTypeFromElfHeader(header);
+    arch_spec.SetArchitecture(eArchTypeELF, header.e_machine, sub_type,
+                              header.e_ident[EI_OSABI]);
+
+    // Validate if it is ok to remove GetOsFromOSABI. Note, that now the OS is
+    // determined based on EI_OSABI flag and the info extracted from ELF notes
+    // (see RefineModuleDetailsFromNote). However in some cases that still
+    // might be not enough: for example a shared library might not have any
+    // notes at all and have EI_OSABI flag set to System V, as result the OS
+    // will be set to UnknownOS.
+    GetOsFromOSABI(header.e_ident[EI_OSABI], ostype);
+    spec_ostype = arch_spec.GetTriple().getOS();
+    assert(spec_ostype == ostype);
+    UNUSED_IF_ASSERT_DISABLED(spec_ostype);
+  }
+
+  if (arch_spec.GetMachine() == llvm::Triple::mips ||
+      arch_spec.GetMachine() == llvm::Triple::mipsel ||
+      arch_spec.GetMachine() == llvm::Triple::mips64 ||
+      arch_spec.GetMachine() == llvm::Triple::mips64el) {
+    switch (header.e_flags & llvm::ELF::EF_MIPS_ARCH_ASE) {
+    case llvm::ELF::EF_MIPS_MICROMIPS:
+      arch_spec.SetFlags(ArchSpec::eMIPSAse_micromips);
+      break;
+    case llvm::ELF::EF_MIPS_ARCH_ASE_M16:
+      arch_spec.SetFlags(ArchSpec::eMIPSAse_mips16);
+      break;
+    case llvm::ELF::EF_MIPS_ARCH_ASE_MDMX:
+      arch_spec.SetFlags(ArchSpec::eMIPSAse_mdmx);
+      break;
+    default:
+      break;
+    }
+  }
+
+  if (arch_spec.GetMachine() == llvm::Triple::arm ||
+      arch_spec.GetMachine() == llvm::Triple::thumb) {
+    if (header.e_flags & llvm::ELF::EF_ARM_SOFT_FLOAT)
+      arch_spec.SetFlags(ArchSpec::eARM_abi_soft_float);
+    else if (header.e_flags & llvm::ELF::EF_ARM_VFP_FLOAT)
+      arch_spec.SetFlags(ArchSpec::eARM_abi_hard_float);
+  }
+
+  // If there are no section headers we are done.
+  if (header.e_shnum == 0)
+    return 0;
+
+  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES));
+
+  section_headers.resize(header.e_shnum);
+  if (section_headers.size() != header.e_shnum)
+    return 0;
+
+  const size_t sh_size = header.e_shnum * header.e_shentsize;
+  const elf_off sh_offset = header.e_shoff;
+  DataExtractor sh_data;
+  if (sh_data.SetData(object_data, sh_offset, sh_size) != sh_size)
+    return 0;
+
+  uint32_t idx;
+  lldb::offset_t offset;
+  for (idx = 0, offset = 0; idx < header.e_shnum; ++idx) {
+    if (!section_headers[idx].Parse(sh_data, &offset))
+      break;
+  }
+  if (idx < section_headers.size())
+    section_headers.resize(idx);
+
+  const unsigned strtab_idx = header.e_shstrndx;
+  if (strtab_idx && strtab_idx < section_headers.size()) {
+    const ELFSectionHeaderInfo &sheader = section_headers[strtab_idx];
+    const size_t byte_size = sheader.sh_size;
+    const Elf64_Off offset = sheader.sh_offset;
+    lldb_private::DataExtractor shstr_data;
+
+    if (shstr_data.SetData(object_data, offset, byte_size) == byte_size) {
+      for (SectionHeaderCollIter I = section_headers.begin();
+           I != section_headers.end(); ++I) {
+        static ConstString g_sect_name_gnu_debuglink(".gnu_debuglink");
+        const ELFSectionHeaderInfo &sheader = *I;
+        const uint64_t section_size =
+            sheader.sh_type == SHT_NOBITS ? 0 : sheader.sh_size;
+        ConstString name(shstr_data.PeekCStr(I->sh_name));
+
+        I->section_name = name;
+
+        if (arch_spec.IsMIPS()) {
+          uint32_t arch_flags = arch_spec.GetFlags();
+          DataExtractor data;
+          if (sheader.sh_type == SHT_MIPS_ABIFLAGS) {
+
+            if (section_size && (data.SetData(object_data, sheader.sh_offset,
+                                              section_size) == section_size)) {
+              // MIPS ASE Mask is at offset 12 in MIPS.abiflags section
+              lldb::offset_t offset = 12; // MIPS ABI Flags Version: 0
+              arch_flags |= data.GetU32(&offset);
+
+              // The floating point ABI is at offset 7
+              offset = 7;
+              switch (data.GetU8(&offset)) {
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_ANY:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_ANY;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_DOUBLE:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_DOUBLE;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_SINGLE:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_SINGLE;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_SOFT:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_SOFT;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_OLD_64:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_OLD_64;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_XX:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_XX;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_64:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_64;
+                break;
+              case llvm::Mips::Val_GNU_MIPS_ABI_FP_64A:
+                arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_64A;
+                break;
+              }
+            }
+          }
+          // Settings appropriate ArchSpec ABI Flags
+          switch (header.e_flags & llvm::ELF::EF_MIPS_ABI) {
+          case llvm::ELF::EF_MIPS_ABI_O32:
+            arch_flags |= lldb_private::ArchSpec::eMIPSABI_O32;
+            break;
+          case EF_MIPS_ABI_O64:
+            arch_flags |= lldb_private::ArchSpec::eMIPSABI_O64;
+            break;
+          case EF_MIPS_ABI_EABI32:
+            arch_flags |= lldb_private::ArchSpec::eMIPSABI_EABI32;
+            break;
+          case EF_MIPS_ABI_EABI64:
+            arch_flags |= lldb_private::ArchSpec::eMIPSABI_EABI64;
+            break;
+          default:
+            // ABI Mask doesn't cover N32 and N64 ABI.
+            if (header.e_ident[EI_CLASS] == llvm::ELF::ELFCLASS64)
+              arch_flags |= lldb_private::ArchSpec::eMIPSABI_N64;
+            else if (header.e_flags & llvm::ELF::EF_MIPS_ABI2)
+              arch_flags |= lldb_private::ArchSpec::eMIPSABI_N32;
+            break;
+          }
+          arch_spec.SetFlags(arch_flags);
+        }
+
+        if (arch_spec.GetMachine() == llvm::Triple::arm ||
+            arch_spec.GetMachine() == llvm::Triple::thumb) {
+          DataExtractor data;
+
+          if (sheader.sh_type == SHT_ARM_ATTRIBUTES && section_size != 0 &&
+              data.SetData(object_data, sheader.sh_offset, section_size) == section_size)
+            ParseARMAttributes(data, section_size, arch_spec);
+        }
+
+        if (name == g_sect_name_gnu_debuglink) {
+          DataExtractor data;
+          if (section_size && (data.SetData(object_data, sheader.sh_offset,
+                                            section_size) == section_size)) {
+            lldb::offset_t gnu_debuglink_offset = 0;
+            gnu_debuglink_file = data.GetCStr(&gnu_debuglink_offset);
+            gnu_debuglink_offset = llvm::alignTo(gnu_debuglink_offset, 4);
+            data.GetU32(&gnu_debuglink_offset, &gnu_debuglink_crc, 1);
+          }
+        }
+
+        // Process ELF note section entries.
+        bool is_note_header = (sheader.sh_type == SHT_NOTE);
+
+        // The section header ".note.android.ident" is stored as a
+        // PROGBITS type header but it is actually a note header.
+        static ConstString g_sect_name_android_ident(".note.android.ident");
+        if (!is_note_header && name == g_sect_name_android_ident)
+          is_note_header = true;
+
+        if (is_note_header) {
+          // Allow notes to refine module info.
+          DataExtractor data;
+          if (section_size && (data.SetData(object_data, sheader.sh_offset,
+                                            section_size) == section_size)) {
+            Status error = RefineModuleDetailsFromNote(data, arch_spec, uuid);
+            if (error.Fail()) {
+              LLDB_LOGF(log, "ObjectFileELF::%s ELF note processing failed: %s",
+                        __FUNCTION__, error.AsCString());
+            }
+          }
+        }
+      }
+
+      // Make any unknown triple components to be unspecified unknowns.
+      if (arch_spec.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
+        arch_spec.GetTriple().setVendorName(llvm::StringRef());
+      if (arch_spec.GetTriple().getOS() == llvm::Triple::UnknownOS)
+        arch_spec.GetTriple().setOSName(llvm::StringRef());
+
+      return section_headers.size();
+    }
+  }
+
+  section_headers.clear();
+  return 0;
+}
+
+llvm::StringRef
+ObjectFileELF::StripLinkerSymbolAnnotations(llvm::StringRef symbol_name) const {
+  size_t pos = symbol_name.find('@');
+  return symbol_name.substr(0, pos);
+}
+
+// ParseSectionHeaders
+size_t ObjectFileELF::ParseSectionHeaders() {
+  return GetSectionHeaderInfo(m_section_headers, m_data, m_header, m_uuid,
+                              m_gnu_debuglink_file, m_gnu_debuglink_crc,
+                              m_arch_spec);
+}
+
+const ObjectFileELF::ELFSectionHeaderInfo *
+ObjectFileELF::GetSectionHeaderByIndex(lldb::user_id_t id) {
+  if (!ParseSectionHeaders())
+    return nullptr;
+
+  if (id < m_section_headers.size())
+    return &m_section_headers[id];
+
+  return nullptr;
+}
+
+lldb::user_id_t ObjectFileELF::GetSectionIndexByName(const char *name) {
+  if (!name || !name[0] || !ParseSectionHeaders())
+    return 0;
+  for (size_t i = 1; i < m_section_headers.size(); ++i)
+    if (m_section_headers[i].section_name == ConstString(name))
+      return i;
+  return 0;
+}
+
+static SectionType GetSectionTypeFromName(llvm::StringRef Name) {
+  if (Name.consume_front(".debug_") || Name.consume_front(".zdebug_")) {
+    return llvm::StringSwitch<SectionType>(Name)
+        .Case("abbrev", eSectionTypeDWARFDebugAbbrev)
+        .Case("abbrev.dwo", eSectionTypeDWARFDebugAbbrevDwo)
+        .Case("addr", eSectionTypeDWARFDebugAddr)
+        .Case("aranges", eSectionTypeDWARFDebugAranges)
+        .Case("cu_index", eSectionTypeDWARFDebugCuIndex)
+        .Case("frame", eSectionTypeDWARFDebugFrame)
+        .Case("info", eSectionTypeDWARFDebugInfo)
+        .Case("info.dwo", eSectionTypeDWARFDebugInfoDwo)
+        .Cases("line", "line.dwo", eSectionTypeDWARFDebugLine)
+        .Cases("line_str", "line_str.dwo", eSectionTypeDWARFDebugLineStr)
+        .Case("loc", eSectionTypeDWARFDebugLoc)
+        .Case("loc.dwo", eSectionTypeDWARFDebugLocDwo)
+        .Case("loclists", eSectionTypeDWARFDebugLocLists)
+        .Case("loclists.dwo", eSectionTypeDWARFDebugLocListsDwo)
+        .Case("macinfo", eSectionTypeDWARFDebugMacInfo)
+        .Cases("macro", "macro.dwo", eSectionTypeDWARFDebugMacro)
+        .Case("names", eSectionTypeDWARFDebugNames)
+        .Case("pubnames", eSectionTypeDWARFDebugPubNames)
+        .Case("pubtypes", eSectionTypeDWARFDebugPubTypes)
+        .Case("ranges", eSectionTypeDWARFDebugRanges)
+        .Case("rnglists", eSectionTypeDWARFDebugRngLists)
+        .Case("rnglists.dwo", eSectionTypeDWARFDebugRngListsDwo)
+        .Case("str", eSectionTypeDWARFDebugStr)
+        .Case("str.dwo", eSectionTypeDWARFDebugStrDwo)
+        .Case("str_offsets", eSectionTypeDWARFDebugStrOffsets)
+        .Case("str_offsets.dwo", eSectionTypeDWARFDebugStrOffsetsDwo)
+        .Case("types", eSectionTypeDWARFDebugTypes)
+        .Case("types.dwo", eSectionTypeDWARFDebugTypesDwo)
+        .Default(eSectionTypeOther);
+  }
+  return llvm::StringSwitch<SectionType>(Name)
+      .Case(".ARM.exidx", eSectionTypeARMexidx)
+      .Case(".ARM.extab", eSectionTypeARMextab)
+      .Cases(".bss", ".tbss", eSectionTypeZeroFill)
+      .Cases(".data", ".tdata", eSectionTypeData)
+      .Case(".eh_frame", eSectionTypeEHFrame)
+      .Case(".gnu_debugaltlink", eSectionTypeDWARFGNUDebugAltLink)
+      .Case(".gosymtab", eSectionTypeGoSymtab)
+      .Case(".text", eSectionTypeCode)
+      .Default(eSectionTypeOther);
+}
+
+SectionType ObjectFileELF::GetSectionType(const ELFSectionHeaderInfo &H) const {
+  switch (H.sh_type) {
+  case SHT_PROGBITS:
+    if (H.sh_flags & SHF_EXECINSTR)
+      return eSectionTypeCode;
+    break;
+  case SHT_SYMTAB:
+    return eSectionTypeELFSymbolTable;
+  case SHT_DYNSYM:
+    return eSectionTypeELFDynamicSymbols;
+  case SHT_RELA:
+  case SHT_REL:
+    return eSectionTypeELFRelocationEntries;
+  case SHT_DYNAMIC:
+    return eSectionTypeELFDynamicLinkInfo;
+  }
+  return GetSectionTypeFromName(H.section_name.GetStringRef());
+}
+
+static uint32_t GetTargetByteSize(SectionType Type, const ArchSpec &arch) {
+  switch (Type) {
+  case eSectionTypeData:
+  case eSectionTypeZeroFill:
+    return arch.GetDataByteSize();
+  case eSectionTypeCode:
+    return arch.GetCodeByteSize();
+  default:
+    return 1;
+  }
+}
+
+static Permissions GetPermissions(const ELFSectionHeader &H) {
+  Permissions Perm = Permissions(0);
+  if (H.sh_flags & SHF_ALLOC)
+    Perm |= ePermissionsReadable;
+  if (H.sh_flags & SHF_WRITE)
+    Perm |= ePermissionsWritable;
+  if (H.sh_flags & SHF_EXECINSTR)
+    Perm |= ePermissionsExecutable;
+  return Perm;
+}
+
+static Permissions GetPermissions(const ELFProgramHeader &H) {
+  Permissions Perm = Permissions(0);
+  if (H.p_flags & PF_R)
+    Perm |= ePermissionsReadable;
+  if (H.p_flags & PF_W)
+    Perm |= ePermissionsWritable;
+  if (H.p_flags & PF_X)
+    Perm |= ePermissionsExecutable;
+  return Perm;
+}
+
+namespace {
+
+using VMRange = lldb_private::Range<addr_t, addr_t>;
+
+struct SectionAddressInfo {
+  SectionSP Segment;
+  VMRange Range;
+};
+
+// (Unlinked) ELF object files usually have 0 for every section address, meaning
+// we need to compute synthetic addresses in order for "file addresses" from
+// different sections to not overlap. This class handles that logic.
+class VMAddressProvider {
+  using VMMap = llvm::IntervalMap<addr_t, SectionSP, 4,
+                                       llvm::IntervalMapHalfOpenInfo<addr_t>>;
+
+  ObjectFile::Type ObjectType;
+  addr_t NextVMAddress = 0;
+  VMMap::Allocator Alloc;
+  VMMap Segments = VMMap(Alloc);
+  VMMap Sections = VMMap(Alloc);
+  lldb_private::Log *Log = GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES);
+  size_t SegmentCount = 0;
+  std::string SegmentName;
+
+  VMRange GetVMRange(const ELFSectionHeader &H) {
+    addr_t Address = H.sh_addr;
+    addr_t Size = H.sh_flags & SHF_ALLOC ? H.sh_size : 0;
+    if (ObjectType == ObjectFile::Type::eTypeObjectFile && Segments.empty() && (H.sh_flags & SHF_ALLOC)) {
+      NextVMAddress =
+          llvm::alignTo(NextVMAddress, std::max<addr_t>(H.sh_addralign, 1));
+      Address = NextVMAddress;
+      NextVMAddress += Size;
+    }
+    return VMRange(Address, Size);
+  }
+
+public:
+  VMAddressProvider(ObjectFile::Type Type, llvm::StringRef SegmentName)
+      : ObjectType(Type), SegmentName(SegmentName) {}
+
+  std::string GetNextSegmentName() const {
+    return llvm::formatv("{0}[{1}]", SegmentName, SegmentCount).str();
+  }
+
+  llvm::Optional<VMRange> GetAddressInfo(const ELFProgramHeader &H) {
+    if (H.p_memsz == 0) {
+      LLDB_LOG(Log, "Ignoring zero-sized {0} segment. Corrupt object file?",
+               SegmentName);
+      return llvm::None;
+    }
+
+    if (Segments.overlaps(H.p_vaddr, H.p_vaddr + H.p_memsz)) {
+      LLDB_LOG(Log, "Ignoring overlapping {0} segment. Corrupt object file?",
+               SegmentName);
+      return llvm::None;
+    }
+    return VMRange(H.p_vaddr, H.p_memsz);
+  }
+
+  llvm::Optional<SectionAddressInfo> GetAddressInfo(const ELFSectionHeader &H) {
+    VMRange Range = GetVMRange(H);
+    SectionSP Segment;
+    auto It = Segments.find(Range.GetRangeBase());
+    if ((H.sh_flags & SHF_ALLOC) && It.valid()) {
+      addr_t MaxSize;
+      if (It.start() <= Range.GetRangeBase()) {
+        MaxSize = It.stop() - Range.GetRangeBase();
+        Segment = *It;
+      } else
+        MaxSize = It.start() - Range.GetRangeBase();
+      if (Range.GetByteSize() > MaxSize) {
+        LLDB_LOG(Log, "Shortening section crossing segment boundaries. "
+                      "Corrupt object file?");
+        Range.SetByteSize(MaxSize);
+      }
+    }
+    if (Range.GetByteSize() > 0 &&
+        Sections.overlaps(Range.GetRangeBase(), Range.GetRangeEnd())) {
+      LLDB_LOG(Log, "Ignoring overlapping section. Corrupt object file?");
+      return llvm::None;
+    }
+    if (Segment)
+      Range.Slide(-Segment->GetFileAddress());
+    return SectionAddressInfo{Segment, Range};
+  }
+
+  void AddSegment(const VMRange &Range, SectionSP Seg) {
+    Segments.insert(Range.GetRangeBase(), Range.GetRangeEnd(), std::move(Seg));
+    ++SegmentCount;
+  }
+
+  void AddSection(SectionAddressInfo Info, SectionSP Sect) {
+    if (Info.Range.GetByteSize() == 0)
+      return;
+    if (Info.Segment)
+      Info.Range.Slide(Info.Segment->GetFileAddress());
+    Sections.insert(Info.Range.GetRangeBase(), Info.Range.GetRangeEnd(),
+                    std::move(Sect));
+  }
+};
+}
+
+void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
+  if (m_sections_up)
+    return;
+
+  m_sections_up = std::make_unique<SectionList>();
+  VMAddressProvider regular_provider(GetType(), "PT_LOAD");
+  VMAddressProvider tls_provider(GetType(), "PT_TLS");
+
+  for (const auto &EnumPHdr : llvm::enumerate(ProgramHeaders())) {
+    const ELFProgramHeader &PHdr = EnumPHdr.value();
+    if (PHdr.p_type != PT_LOAD && PHdr.p_type != PT_TLS)
+      continue;
+
+    VMAddressProvider &provider =
+        PHdr.p_type == PT_TLS ? tls_provider : regular_provider;
+    auto InfoOr = provider.GetAddressInfo(PHdr);
+    if (!InfoOr)
+      continue;
+
+    uint32_t Log2Align = llvm::Log2_64(std::max<elf_xword>(PHdr.p_align, 1));
+    SectionSP Segment = std::make_shared<Section>(
+        GetModule(), this, SegmentID(EnumPHdr.index()),
+        ConstString(provider.GetNextSegmentName()), eSectionTypeContainer,
+        InfoOr->GetRangeBase(), InfoOr->GetByteSize(), PHdr.p_offset,
+        PHdr.p_filesz, Log2Align, /*flags*/ 0);
+    Segment->SetPermissions(GetPermissions(PHdr));
+    Segment->SetIsThreadSpecific(PHdr.p_type == PT_TLS);
+    m_sections_up->AddSection(Segment);
+
+    provider.AddSegment(*InfoOr, std::move(Segment));
+  }
+
+  ParseSectionHeaders();
+  if (m_section_headers.empty())
+    return;
+
+  for (SectionHeaderCollIter I = std::next(m_section_headers.begin());
+       I != m_section_headers.end(); ++I) {
+    const ELFSectionHeaderInfo &header = *I;
+
+    ConstString &name = I->section_name;
+    const uint64_t file_size =
+        header.sh_type == SHT_NOBITS ? 0 : header.sh_size;
+
+    VMAddressProvider &provider =
+        header.sh_flags & SHF_TLS ? tls_provider : regular_provider;
+    auto InfoOr = provider.GetAddressInfo(header);
+    if (!InfoOr)
+      continue;
+
+    SectionType sect_type = GetSectionType(header);
+
+    const uint32_t target_bytes_size =
+        GetTargetByteSize(sect_type, m_arch_spec);
+
+    elf::elf_xword log2align =
+        (header.sh_addralign == 0) ? 0 : llvm::Log2_64(header.sh_addralign);
+
+    SectionSP section_sp(new Section(
+        InfoOr->Segment, GetModule(), // Module to which this section belongs.
+        this,            // ObjectFile to which this section belongs and should
+                         // read section data from.
+        SectionIndex(I), // Section ID.
+        name,            // Section name.
+        sect_type,       // Section type.
+        InfoOr->Range.GetRangeBase(), // VM address.
+        InfoOr->Range.GetByteSize(),  // VM size in bytes of this section.
+        header.sh_offset,             // Offset of this section in the file.
+        file_size,           // Size of the section as found in the file.
+        log2align,           // Alignment of the section
+        header.sh_flags,     // Flags for this section.
+        target_bytes_size)); // Number of host bytes per target byte
+
+    section_sp->SetPermissions(GetPermissions(header));
+    section_sp->SetIsThreadSpecific(header.sh_flags & SHF_TLS);
+    (InfoOr->Segment ? InfoOr->Segment->GetChildren() : *m_sections_up)
+        .AddSection(section_sp);
+    provider.AddSection(std::move(*InfoOr), std::move(section_sp));
+  }
+
+  // For eTypeDebugInfo files, the Symbol Vendor will take care of updating the
+  // unified section list.
+  if (GetType() != eTypeDebugInfo)
+    unified_section_list = *m_sections_up;
+  
+  // If there's a .gnu_debugdata section, we'll try to read the .symtab that's
+  // embedded in there and replace the one in the original object file (if any).
+  // If there's none in the orignal object file, we add it to it.
+  if (auto gdd_obj_file = GetGnuDebugDataObjectFile()) {
+    if (auto gdd_objfile_section_list = gdd_obj_file->GetSectionList()) {
+      if (SectionSP symtab_section_sp =
+              gdd_objfile_section_list->FindSectionByType(
+                  eSectionTypeELFSymbolTable, true)) {
+        SectionSP module_section_sp = unified_section_list.FindSectionByType(
+            eSectionTypeELFSymbolTable, true);
+        if (module_section_sp)
+          unified_section_list.ReplaceSection(module_section_sp->GetID(),
+                                              symtab_section_sp);
+        else
+          unified_section_list.AddSection(symtab_section_sp);
+      }
+    }
+  }  
+}
+
+std::shared_ptr<ObjectFileELF> ObjectFileELF::GetGnuDebugDataObjectFile() {
+  if (m_gnu_debug_data_object_file != nullptr)
+    return m_gnu_debug_data_object_file;
+
+  SectionSP section =
+      GetSectionList()->FindSectionByName(ConstString(".gnu_debugdata"));
+  if (!section)
+    return nullptr;
+
+  if (!lldb_private::lzma::isAvailable()) {
+    GetModule()->ReportWarning(
+        "No LZMA support found for reading .gnu_debugdata section");
+    return nullptr;
+  }
+
+  // Uncompress the data
+  DataExtractor data;
+  section->GetSectionData(data);
+  llvm::SmallVector<uint8_t, 0> uncompressedData;
+  auto err = lldb_private::lzma::uncompress(data.GetData(), uncompressedData);
+  if (err) {
+    GetModule()->ReportWarning(
+        "An error occurred while decompression the section %s: %s",
+        section->GetName().AsCString(), llvm::toString(std::move(err)).c_str());
+    return nullptr;
+  }
+
+  // Construct ObjectFileELF object from decompressed buffer
+  DataBufferSP gdd_data_buf(
+      new DataBufferHeap(uncompressedData.data(), uncompressedData.size()));
+  auto fspec = GetFileSpec().CopyByAppendingPathComponent(
+      llvm::StringRef("gnu_debugdata"));
+  m_gnu_debug_data_object_file.reset(new ObjectFileELF(
+      GetModule(), gdd_data_buf, 0, &fspec, 0, gdd_data_buf->GetByteSize()));
+
+  // This line is essential; otherwise a breakpoint can be set but not hit.
+  m_gnu_debug_data_object_file->SetType(ObjectFile::eTypeDebugInfo);
+
+  ArchSpec spec = m_gnu_debug_data_object_file->GetArchitecture();
+  if (spec && m_gnu_debug_data_object_file->SetModulesArchitecture(spec))
+    return m_gnu_debug_data_object_file;
+  
+  return nullptr;
+}
+
+// Find the arm/aarch64 mapping symbol character in the given symbol name.
+// Mapping symbols have the form of "$<char>[.<any>]*". Additionally we
+// recognize cases when the mapping symbol prefixed by an arbitrary string
+// because if a symbol prefix added to each symbol in the object file with
+// objcopy then the mapping symbols are also prefixed.
+static char FindArmAarch64MappingSymbol(const char *symbol_name) {
+  if (!symbol_name)
+    return '\0';
+
+  const char *dollar_pos = ::strchr(symbol_name, '$');
+  if (!dollar_pos || dollar_pos[1] == '\0')
+    return '\0';
+
+  if (dollar_pos[2] == '\0' || dollar_pos[2] == '.')
+    return dollar_pos[1];
+  return '\0';
+}
+
+#define STO_MIPS_ISA (3 << 6)
+#define STO_MICROMIPS (2 << 6)
+#define IS_MICROMIPS(ST_OTHER) (((ST_OTHER)&STO_MIPS_ISA) == STO_MICROMIPS)
+
+// private
+unsigned ObjectFileELF::ParseSymbols(Symtab *symtab, user_id_t start_id,
+                                     SectionList *section_list,
+                                     const size_t num_symbols,
+                                     const DataExtractor &symtab_data,
+                                     const DataExtractor &strtab_data) {
+  ELFSymbol symbol;
+  lldb::offset_t offset = 0;
+
+  static ConstString text_section_name(".text");
+  static ConstString init_section_name(".init");
+  static ConstString fini_section_name(".fini");
+  static ConstString ctors_section_name(".ctors");
+  static ConstString dtors_section_name(".dtors");
+
+  static ConstString data_section_name(".data");
+  static ConstString rodata_section_name(".rodata");
+  static ConstString rodata1_section_name(".rodata1");
+  static ConstString data2_section_name(".data1");
+  static ConstString bss_section_name(".bss");
+  static ConstString opd_section_name(".opd"); // For ppc64
+
+  // On Android the oatdata and the oatexec symbols in the oat and odex files
+  // covers the full .text section what causes issues with displaying unusable
+  // symbol name to the user and very slow unwinding speed because the
+  // instruction emulation based unwind plans try to emulate all instructions
+  // in these symbols. Don't add these symbols to the symbol list as they have
+  // no use for the debugger and they are causing a lot of trouble. Filtering
+  // can't be restricted to Android because this special object file don't
+  // contain the note section specifying the environment to Android but the
+  // custom extension and file name makes it highly unlikely that this will
+  // collide with anything else.
+  ConstString file_extension = m_file.GetFileNameExtension();
+  bool skip_oatdata_oatexec =
+      file_extension == ".oat" || file_extension == ".odex";
+
+  ArchSpec arch = GetArchitecture();
+  ModuleSP module_sp(GetModule());
+  SectionList *module_section_list =
+      module_sp ? module_sp->GetSectionList() : nullptr;
+
+  // Local cache to avoid doing a FindSectionByName for each symbol. The "const
+  // char*" key must came from a ConstString object so they can be compared by
+  // pointer
+  std::unordered_map<const char *, lldb::SectionSP> section_name_to_section;
+
+  unsigned i;
+  for (i = 0; i < num_symbols; ++i) {
+    if (!symbol.Parse(symtab_data, &offset))
+      break;
+
+    const char *symbol_name = strtab_data.PeekCStr(symbol.st_name);
+    if (!symbol_name)
+      symbol_name = "";
+
+    // No need to add non-section symbols that have no names
+    if (symbol.getType() != STT_SECTION &&
+        (symbol_name == nullptr || symbol_name[0] == '\0'))
+      continue;
+
+    // Skipping oatdata and oatexec sections if it is requested. See details
+    // above the definition of skip_oatdata_oatexec for the reasons.
+    if (skip_oatdata_oatexec && (::strcmp(symbol_name, "oatdata") == 0 ||
+                                 ::strcmp(symbol_name, "oatexec") == 0))
+      continue;
+
+    SectionSP symbol_section_sp;
+    SymbolType symbol_type = eSymbolTypeInvalid;
+    Elf64_Half shndx = symbol.st_shndx;
+
+    switch (shndx) {
+    case SHN_ABS:
+      symbol_type = eSymbolTypeAbsolute;
+      break;
+    case SHN_UNDEF:
+      symbol_type = eSymbolTypeUndefined;
+      break;
+    default:
+      symbol_section_sp = section_list->FindSectionByID(shndx);
+      break;
+    }
+
+    // If a symbol is undefined do not process it further even if it has a STT
+    // type
+    if (symbol_type != eSymbolTypeUndefined) {
+      switch (symbol.getType()) {
+      default:
+      case STT_NOTYPE:
+        // The symbol's type is not specified.
+        break;
+
+      case STT_OBJECT:
+        // The symbol is associated with a data object, such as a variable, an
+        // array, etc.
+        symbol_type = eSymbolTypeData;
+        break;
+
+      case STT_FUNC:
+        // The symbol is associated with a function or other executable code.
+        symbol_type = eSymbolTypeCode;
+        break;
+
+      case STT_SECTION:
+        // The symbol is associated with a section. Symbol table entries of
+        // this type exist primarily for relocation and normally have STB_LOCAL
+        // binding.
+        break;
+
+      case STT_FILE:
+        // Conventionally, the symbol's name gives the name of the source file
+        // associated with the object file. A file symbol has STB_LOCAL
+        // binding, its section index is SHN_ABS, and it precedes the other
+        // STB_LOCAL symbols for the file, if it is present.
+        symbol_type = eSymbolTypeSourceFile;
+        break;
+
+      case STT_GNU_IFUNC:
+        // The symbol is associated with an indirect function. The actual
+        // function will be resolved if it is referenced.
+        symbol_type = eSymbolTypeResolver;
+        break;
+      }
+    }
+
+    if (symbol_type == eSymbolTypeInvalid && symbol.getType() != STT_SECTION) {
+      if (symbol_section_sp) {
+        ConstString sect_name = symbol_section_sp->GetName();
+        if (sect_name == text_section_name || sect_name == init_section_name ||
+            sect_name == fini_section_name || sect_name == ctors_section_name ||
+            sect_name == dtors_section_name) {
+          symbol_type = eSymbolTypeCode;
+        } else if (sect_name == data_section_name ||
+                   sect_name == data2_section_name ||
+                   sect_name == rodata_section_name ||
+                   sect_name == rodata1_section_name ||
+                   sect_name == bss_section_name) {
+          symbol_type = eSymbolTypeData;
+        }
+      }
+    }
+
+    int64_t symbol_value_offset = 0;
+    uint32_t additional_flags = 0;
+
+    if (arch.IsValid()) {
+      if (arch.GetMachine() == llvm::Triple::arm) {
+        if (symbol.getBinding() == STB_LOCAL) {
+          char mapping_symbol = FindArmAarch64MappingSymbol(symbol_name);
+          if (symbol_type == eSymbolTypeCode) {
+            switch (mapping_symbol) {
+            case 'a':
+              // $a[.<any>]* - marks an ARM instruction sequence
+              m_address_class_map[symbol.st_value] = AddressClass::eCode;
+              break;
+            case 'b':
+            case 't':
+              // $b[.<any>]* - marks a THUMB BL instruction sequence
+              // $t[.<any>]* - marks a THUMB instruction sequence
+              m_address_class_map[symbol.st_value] =
+                  AddressClass::eCodeAlternateISA;
+              break;
+            case 'd':
+              // $d[.<any>]* - marks a data item sequence (e.g. lit pool)
+              m_address_class_map[symbol.st_value] = AddressClass::eData;
+              break;
+            }
+          }
+          if (mapping_symbol)
+            continue;
+        }
+      } else if (arch.GetMachine() == llvm::Triple::aarch64) {
+        if (symbol.getBinding() == STB_LOCAL) {
+          char mapping_symbol = FindArmAarch64MappingSymbol(symbol_name);
+          if (symbol_type == eSymbolTypeCode) {
+            switch (mapping_symbol) {
+            case 'x':
+              // $x[.<any>]* - marks an A64 instruction sequence
+              m_address_class_map[symbol.st_value] = AddressClass::eCode;
+              break;
+            case 'd':
+              // $d[.<any>]* - marks a data item sequence (e.g. lit pool)
+              m_address_class_map[symbol.st_value] = AddressClass::eData;
+              break;
+            }
+          }
+          if (mapping_symbol)
+            continue;
+        }
+      }
+
+      if (arch.GetMachine() == llvm::Triple::arm) {
+        if (symbol_type == eSymbolTypeCode) {
+          if (symbol.st_value & 1) {
+            // Subtracting 1 from the address effectively unsets the low order
+            // bit, which results in the address actually pointing to the
+            // beginning of the symbol. This delta will be used below in
+            // conjunction with symbol.st_value to produce the final
+            // symbol_value that we store in the symtab.
+            symbol_value_offset = -1;
+            m_address_class_map[symbol.st_value ^ 1] =
+                AddressClass::eCodeAlternateISA;
+          } else {
+            // This address is ARM
+            m_address_class_map[symbol.st_value] = AddressClass::eCode;
+          }
+        }
+      }
+
+      /*
+       * MIPS:
+       * The bit #0 of an address is used for ISA mode (1 for microMIPS, 0 for
+       * MIPS).
+       * This allows processor to switch between microMIPS and MIPS without any
+       * need
+       * for special mode-control register. However, apart from .debug_line,
+       * none of
+       * the ELF/DWARF sections set the ISA bit (for symbol or section). Use
+       * st_other
+       * flag to check whether the symbol is microMIPS and then set the address
+       * class
+       * accordingly.
+      */
+      if (arch.IsMIPS()) {
+        if (IS_MICROMIPS(symbol.st_other))
+          m_address_class_map[symbol.st_value] = AddressClass::eCodeAlternateISA;
+        else if ((symbol.st_value & 1) && (symbol_type == eSymbolTypeCode)) {
+          symbol.st_value = symbol.st_value & (~1ull);
+          m_address_class_map[symbol.st_value] = AddressClass::eCodeAlternateISA;
+        } else {
+          if (symbol_type == eSymbolTypeCode)
+            m_address_class_map[symbol.st_value] = AddressClass::eCode;
+          else if (symbol_type == eSymbolTypeData)
+            m_address_class_map[symbol.st_value] = AddressClass::eData;
+          else
+            m_address_class_map[symbol.st_value] = AddressClass::eUnknown;
+        }
+      }
+    }
+
+    // symbol_value_offset may contain 0 for ARM symbols or -1 for THUMB
+    // symbols. See above for more details.
+    uint64_t symbol_value = symbol.st_value + symbol_value_offset;
+
+    if (symbol_section_sp == nullptr && shndx == SHN_ABS &&
+        symbol.st_size != 0) {
+      // We don't have a section for a symbol with non-zero size. Create a new
+      // section for it so the address range covered by the symbol is also
+      // covered by the module (represented through the section list). It is
+      // needed so module lookup for the addresses covered by this symbol will
+      // be successfull. This case happens for absolute symbols.
+      ConstString fake_section_name(std::string(".absolute.") + symbol_name);
+      symbol_section_sp =
+          std::make_shared<Section>(module_sp, this, SHN_ABS, fake_section_name,
+                                    eSectionTypeAbsoluteAddress, symbol_value,
+                                    symbol.st_size, 0, 0, 0, SHF_ALLOC);
+
+      module_section_list->AddSection(symbol_section_sp);
+      section_list->AddSection(symbol_section_sp);
+    }
+
+    if (symbol_section_sp &&
+        CalculateType() != ObjectFile::Type::eTypeObjectFile)
+      symbol_value -= symbol_section_sp->GetFileAddress();
+
+    if (symbol_section_sp && module_section_list &&
+        module_section_list != section_list) {
+      ConstString sect_name = symbol_section_sp->GetName();
+      auto section_it = section_name_to_section.find(sect_name.GetCString());
+      if (section_it == section_name_to_section.end())
+        section_it =
+            section_name_to_section
+                .emplace(sect_name.GetCString(),
+                         module_section_list->FindSectionByName(sect_name))
+                .first;
+      if (section_it->second)
+        symbol_section_sp = section_it->second;
+    }
+
+    bool is_global = symbol.getBinding() == STB_GLOBAL;
+    uint32_t flags = symbol.st_other << 8 | symbol.st_info | additional_flags;
+    llvm::StringRef symbol_ref(symbol_name);
+
+    // Symbol names may contain @VERSION suffixes. Find those and strip them
+    // temporarily.
+    size_t version_pos = symbol_ref.find('@');
+    bool has_suffix = version_pos != llvm::StringRef::npos;
+    llvm::StringRef symbol_bare = symbol_ref.substr(0, version_pos);
+    Mangled mangled(symbol_bare);
+
+    // Now append the suffix back to mangled and unmangled names. Only do it if
+    // the demangling was successful (string is not empty).
+    if (has_suffix) {
+      llvm::StringRef suffix = symbol_ref.substr(version_pos);
+
+      llvm::StringRef mangled_name = mangled.GetMangledName().GetStringRef();
+      if (!mangled_name.empty())
+        mangled.SetMangledName(ConstString((mangled_name + suffix).str()));
+
+      ConstString demangled =
+          mangled.GetDemangledName(lldb::eLanguageTypeUnknown);
+      llvm::StringRef demangled_name = demangled.GetStringRef();
+      if (!demangled_name.empty())
+        mangled.SetDemangledName(ConstString((demangled_name + suffix).str()));
+    }
+
+    // In ELF all symbol should have a valid size but it is not true for some
+    // function symbols coming from hand written assembly. As none of the
+    // function symbol should have 0 size we try to calculate the size for
+    // these symbols in the symtab with saying that their original size is not
+    // valid.
+    bool symbol_size_valid =
+        symbol.st_size != 0 || symbol.getType() != STT_FUNC;
+
+    Symbol dc_symbol(
+        i + start_id, // ID is the original symbol table index.
+        mangled,
+        symbol_type,                    // Type of this symbol
+        is_global,                      // Is this globally visible?
+        false,                          // Is this symbol debug info?
+        false,                          // Is this symbol a trampoline?
+        false,                          // Is this symbol artificial?
+        AddressRange(symbol_section_sp, // Section in which this symbol is
+                                        // defined or null.
+                     symbol_value,      // Offset in section or symbol value.
+                     symbol.st_size),   // Size in bytes of this symbol.
+        symbol_size_valid,              // Symbol size is valid
+        has_suffix,                     // Contains linker annotations?
+        flags);                         // Symbol flags.
+    if (symbol.getBinding() == STB_WEAK)
+      dc_symbol.SetIsWeak(true);
+    symtab->AddSymbol(dc_symbol);
+  }
+  return i;
+}
+
+unsigned ObjectFileELF::ParseSymbolTable(Symtab *symbol_table,
+                                         user_id_t start_id,
+                                         lldb_private::Section *symtab) {
+  if (symtab->GetObjectFile() != this) {
+    // If the symbol table section is owned by a different object file, have it
+    // do the parsing.
+    ObjectFileELF *obj_file_elf =
+        static_cast<ObjectFileELF *>(symtab->GetObjectFile());
+    return obj_file_elf->ParseSymbolTable(symbol_table, start_id, symtab);
+  }
+
+  // Get section list for this object file.
+  SectionList *section_list = m_sections_up.get();
+  if (!section_list)
+    return 0;
+
+  user_id_t symtab_id = symtab->GetID();
+  const ELFSectionHeaderInfo *symtab_hdr = GetSectionHeaderByIndex(symtab_id);
+  assert(symtab_hdr->sh_type == SHT_SYMTAB ||
+         symtab_hdr->sh_type == SHT_DYNSYM);
+
+  // sh_link: section header index of associated string table.
+  user_id_t strtab_id = symtab_hdr->sh_link;
+  Section *strtab = section_list->FindSectionByID(strtab_id).get();
+
+  if (symtab && strtab) {
+    assert(symtab->GetObjectFile() == this);
+    assert(strtab->GetObjectFile() == this);
+
+    DataExtractor symtab_data;
+    DataExtractor strtab_data;
+    if (ReadSectionData(symtab, symtab_data) &&
+        ReadSectionData(strtab, strtab_data)) {
+      size_t num_symbols = symtab_data.GetByteSize() / symtab_hdr->sh_entsize;
+
+      return ParseSymbols(symbol_table, start_id, section_list, num_symbols,
+                          symtab_data, strtab_data);
+    }
+  }
+
+  return 0;
+}
+
+size_t ObjectFileELF::ParseDynamicSymbols() {
+  if (m_dynamic_symbols.size())
+    return m_dynamic_symbols.size();
+
+  SectionList *section_list = GetSectionList();
+  if (!section_list)
+    return 0;
+
+  // Find the SHT_DYNAMIC section.
+  Section *dynsym =
+      section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true)
+          .get();
+  if (!dynsym)
+    return 0;
+  assert(dynsym->GetObjectFile() == this);
+
+  ELFDynamic symbol;
+  DataExtractor dynsym_data;
+  if (ReadSectionData(dynsym, dynsym_data)) {
+    const lldb::offset_t section_size = dynsym_data.GetByteSize();
+    lldb::offset_t cursor = 0;
+
+    while (cursor < section_size) {
+      if (!symbol.Parse(dynsym_data, &cursor))
+        break;
+
+      m_dynamic_symbols.push_back(symbol);
+    }
+  }
+
+  return m_dynamic_symbols.size();
+}
+
+const ELFDynamic *ObjectFileELF::FindDynamicSymbol(unsigned tag) {
+  if (!ParseDynamicSymbols())
+    return nullptr;
+
+  DynamicSymbolCollIter I = m_dynamic_symbols.begin();
+  DynamicSymbolCollIter E = m_dynamic_symbols.end();
+  for (; I != E; ++I) {
+    ELFDynamic *symbol = &*I;
+
+    if (symbol->d_tag == tag)
+      return symbol;
+  }
+
+  return nullptr;
+}
+
+unsigned ObjectFileELF::PLTRelocationType() {
+  // DT_PLTREL
+  //  This member specifies the type of relocation entry to which the
+  //  procedure linkage table refers. The d_val member holds DT_REL or
+  //  DT_RELA, as appropriate. All relocations in a procedure linkage table
+  //  must use the same relocation.
+  const ELFDynamic *symbol = FindDynamicSymbol(DT_PLTREL);
+
+  if (symbol)
+    return symbol->d_val;
+
+  return 0;
+}
+
+// Returns the size of the normal plt entries and the offset of the first
+// normal plt entry. The 0th entry in the plt table is usually a resolution
+// entry which have different size in some architectures then the rest of the
+// plt entries.
+static std::pair<uint64_t, uint64_t>
+GetPltEntrySizeAndOffset(const ELFSectionHeader *rel_hdr,
+                         const ELFSectionHeader *plt_hdr) {
+  const elf_xword num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;
+
+  // Clang 3.3 sets entsize to 4 for 32-bit binaries, but the plt entries are
+  // 16 bytes. So round the entsize up by the alignment if addralign is set.
+  elf_xword plt_entsize =
+      plt_hdr->sh_addralign
+          ? llvm::alignTo(plt_hdr->sh_entsize, plt_hdr->sh_addralign)
+          : plt_hdr->sh_entsize;
+
+  // Some linkers e.g ld for arm, fill plt_hdr->sh_entsize field incorrectly.
+  // PLT entries relocation code in general requires multiple instruction and
+  // should be greater than 4 bytes in most cases. Try to guess correct size
+  // just in case.
+  if (plt_entsize <= 4) {
+    // The linker haven't set the plt_hdr->sh_entsize field. Try to guess the
+    // size of the plt entries based on the number of entries and the size of
+    // the plt section with the assumption that the size of the 0th entry is at
+    // least as big as the size of the normal entries and it isn't much bigger
+    // then that.
+    if (plt_hdr->sh_addralign)
+      plt_entsize = plt_hdr->sh_size / plt_hdr->sh_addralign /
+                    (num_relocations + 1) * plt_hdr->sh_addralign;
+    else
+      plt_entsize = plt_hdr->sh_size / (num_relocations + 1);
+  }
+
+  elf_xword plt_offset = plt_hdr->sh_size - num_relocations * plt_entsize;
+
+  return std::make_pair(plt_entsize, plt_offset);
+}
+
+static unsigned ParsePLTRelocations(
+    Symtab *symbol_table, user_id_t start_id, unsigned rel_type,
+    const ELFHeader *hdr, const ELFSectionHeader *rel_hdr,
+    const ELFSectionHeader *plt_hdr, const ELFSectionHeader *sym_hdr,
+    const lldb::SectionSP &plt_section_sp, DataExtractor &rel_data,
+    DataExtractor &symtab_data, DataExtractor &strtab_data) {
+  ELFRelocation rel(rel_type);
+  ELFSymbol symbol;
+  lldb::offset_t offset = 0;
+
+  uint64_t plt_offset, plt_entsize;
+  std::tie(plt_entsize, plt_offset) =
+      GetPltEntrySizeAndOffset(rel_hdr, plt_hdr);
+  const elf_xword num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;
+
+  typedef unsigned (*reloc_info_fn)(const ELFRelocation &rel);
+  reloc_info_fn reloc_type;
+  reloc_info_fn reloc_symbol;
+
+  if (hdr->Is32Bit()) {
+    reloc_type = ELFRelocation::RelocType32;
+    reloc_symbol = ELFRelocation::RelocSymbol32;
+  } else {
+    reloc_type = ELFRelocation::RelocType64;
+    reloc_symbol = ELFRelocation::RelocSymbol64;
+  }
+
+  unsigned slot_type = hdr->GetRelocationJumpSlotType();
+  unsigned i;
+  for (i = 0; i < num_relocations; ++i) {
+    if (!rel.Parse(rel_data, &offset))
+      break;
+
+    if (reloc_type(rel) != slot_type)
+      continue;
+
+    lldb::offset_t symbol_offset = reloc_symbol(rel) * sym_hdr->sh_entsize;
+    if (!symbol.Parse(symtab_data, &symbol_offset))
+      break;
+
+    const char *symbol_name = strtab_data.PeekCStr(symbol.st_name);
+    uint64_t plt_index = plt_offset + i * plt_entsize;
+
+    Symbol jump_symbol(
+        i + start_id,          // Symbol table index
+        symbol_name,           // symbol name.
+        eSymbolTypeTrampoline, // Type of this symbol
+        false,                 // Is this globally visible?
+        false,                 // Is this symbol debug info?
+        true,                  // Is this symbol a trampoline?
+        true,                  // Is this symbol artificial?
+        plt_section_sp, // Section in which this symbol is defined or null.
+        plt_index,      // Offset in section or symbol value.
+        plt_entsize,    // Size in bytes of this symbol.
+        true,           // Size is valid
+        false,          // Contains linker annotations?
+        0);             // Symbol flags.
+
+    symbol_table->AddSymbol(jump_symbol);
+  }
+
+  return i;
+}
+
+unsigned
+ObjectFileELF::ParseTrampolineSymbols(Symtab *symbol_table, user_id_t start_id,
+                                      const ELFSectionHeaderInfo *rel_hdr,
+                                      user_id_t rel_id) {
+  assert(rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL);
+
+  // The link field points to the associated symbol table.
+  user_id_t symtab_id = rel_hdr->sh_link;
+
+  // If the link field doesn't point to the appropriate symbol name table then
+  // try to find it by name as some compiler don't fill in the link fields.
+  if (!symtab_id)
+    symtab_id = GetSectionIndexByName(".dynsym");
+
+  // Get PLT section.  We cannot use rel_hdr->sh_info, since current linkers
+  // point that to the .got.plt or .got section instead of .plt.
+  user_id_t plt_id = GetSectionIndexByName(".plt");
+
+  if (!symtab_id || !plt_id)
+    return 0;
+
+  const ELFSectionHeaderInfo *plt_hdr = GetSectionHeaderByIndex(plt_id);
+  if (!plt_hdr)
+    return 0;
+
+  const ELFSectionHeaderInfo *sym_hdr = GetSectionHeaderByIndex(symtab_id);
+  if (!sym_hdr)
+    return 0;
+
+  SectionList *section_list = m_sections_up.get();
+  if (!section_list)
+    return 0;
+
+  Section *rel_section = section_list->FindSectionByID(rel_id).get();
+  if (!rel_section)
+    return 0;
+
+  SectionSP plt_section_sp(section_list->FindSectionByID(plt_id));
+  if (!plt_section_sp)
+    return 0;
+
+  Section *symtab = section_list->FindSectionByID(symtab_id).get();
+  if (!symtab)
+    return 0;
+
+  // sh_link points to associated string table.
+  Section *strtab = section_list->FindSectionByID(sym_hdr->sh_link).get();
+  if (!strtab)
+    return 0;
+
+  DataExtractor rel_data;
+  if (!ReadSectionData(rel_section, rel_data))
+    return 0;
+
+  DataExtractor symtab_data;
+  if (!ReadSectionData(symtab, symtab_data))
+    return 0;
+
+  DataExtractor strtab_data;
+  if (!ReadSectionData(strtab, strtab_data))
+    return 0;
+
+  unsigned rel_type = PLTRelocationType();
+  if (!rel_type)
+    return 0;
+
+  return ParsePLTRelocations(symbol_table, start_id, rel_type, &m_header,
+                             rel_hdr, plt_hdr, sym_hdr, plt_section_sp,
+                             rel_data, symtab_data, strtab_data);
+}
+
+unsigned ObjectFileELF::ApplyRelocations(
+    Symtab *symtab, const ELFHeader *hdr, const ELFSectionHeader *rel_hdr,
+    const ELFSectionHeader *symtab_hdr, const ELFSectionHeader *debug_hdr,
+    DataExtractor &rel_data, DataExtractor &symtab_data,
+    DataExtractor &debug_data, Section *rel_section) {
+  ELFRelocation rel(rel_hdr->sh_type);
+  lldb::addr_t offset = 0;
+  const unsigned num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;
+  typedef unsigned (*reloc_info_fn)(const ELFRelocation &rel);
+  reloc_info_fn reloc_type;
+  reloc_info_fn reloc_symbol;
+
+  if (hdr->Is32Bit()) {
+    reloc_type = ELFRelocation::RelocType32;
+    reloc_symbol = ELFRelocation::RelocSymbol32;
+  } else {
+    reloc_type = ELFRelocation::RelocType64;
+    reloc_symbol = ELFRelocation::RelocSymbol64;
+  }
+
+  for (unsigned i = 0; i < num_relocations; ++i) {
+    if (!rel.Parse(rel_data, &offset))
+      break;
+
+    Symbol *symbol = nullptr;
+
+    if (hdr->Is32Bit()) {
+      switch (reloc_type(rel)) {
+      case R_386_32:
+      case R_386_PC32:
+      default:
+        // FIXME: This asserts with this input:
+        //
+        // foo.cpp
+        // int main(int argc, char **argv) { return 0; }
+        //
+        // clang++.exe --target=i686-unknown-linux-gnu -g -c foo.cpp -o foo.o
+        //
+        // and running this on the foo.o module.
+        assert(false && "unexpected relocation type");
+      }
+    } else {
+      switch (reloc_type(rel)) {
+      case R_AARCH64_ABS64:
+      case R_X86_64_64: {
+        symbol = symtab->FindSymbolByID(reloc_symbol(rel));
+        if (symbol) {
+          addr_t value = symbol->GetAddressRef().GetFileAddress();
+          DataBufferSP &data_buffer_sp = debug_data.GetSharedDataBuffer();
+          uint64_t *dst = reinterpret_cast<uint64_t *>(
+              data_buffer_sp->GetBytes() + rel_section->GetFileOffset() +
+              ELFRelocation::RelocOffset64(rel));
+          uint64_t val_offset = value + ELFRelocation::RelocAddend64(rel);
+          memcpy(dst, &val_offset, sizeof(uint64_t));
+        }
+        break;
+      }
+      case R_X86_64_32:
+      case R_X86_64_32S:
+      case R_AARCH64_ABS32: {
+        symbol = symtab->FindSymbolByID(reloc_symbol(rel));
+        if (symbol) {
+          addr_t value = symbol->GetAddressRef().GetFileAddress();
+          value += ELFRelocation::RelocAddend32(rel);
+          if ((reloc_type(rel) == R_X86_64_32 && (value > UINT32_MAX)) ||
+              (reloc_type(rel) == R_X86_64_32S &&
+               ((int64_t)value > INT32_MAX && (int64_t)value < INT32_MIN)) ||
+              (reloc_type(rel) == R_AARCH64_ABS32 &&
+               ((int64_t)value > INT32_MAX && (int64_t)value < INT32_MIN))) {
+            Log *log =
+                lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES);
+            LLDB_LOGF(log, "Failed to apply debug info relocations");
+            break;
+          }
+          uint32_t truncated_addr = (value & 0xFFFFFFFF);
+          DataBufferSP &data_buffer_sp = debug_data.GetSharedDataBuffer();
+          uint32_t *dst = reinterpret_cast<uint32_t *>(
+              data_buffer_sp->GetBytes() + rel_section->GetFileOffset() +
+              ELFRelocation::RelocOffset32(rel));
+          memcpy(dst, &truncated_addr, sizeof(uint32_t));
+        }
+        break;
+      }
+      case R_X86_64_PC32:
+      default:
+        assert(false && "unexpected relocation type");
+      }
+    }
+  }
+
+  return 0;
+}
+
+unsigned ObjectFileELF::RelocateDebugSections(const ELFSectionHeader *rel_hdr,
+                                              user_id_t rel_id,
+                                              lldb_private::Symtab *thetab) {
+  assert(rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL);
+
+  // Parse in the section list if needed.
+  SectionList *section_list = GetSectionList();
+  if (!section_list)
+    return 0;
+
+  user_id_t symtab_id = rel_hdr->sh_link;
+  user_id_t debug_id = rel_hdr->sh_info;
+
+  const ELFSectionHeader *symtab_hdr = GetSectionHeaderByIndex(symtab_id);
+  if (!symtab_hdr)
+    return 0;
+
+  const ELFSectionHeader *debug_hdr = GetSectionHeaderByIndex(debug_id);
+  if (!debug_hdr)
+    return 0;
+
+  Section *rel = section_list->FindSectionByID(rel_id).get();
+  if (!rel)
+    return 0;
+
+  Section *symtab = section_list->FindSectionByID(symtab_id).get();
+  if (!symtab)
+    return 0;
+
+  Section *debug = section_list->FindSectionByID(debug_id).get();
+  if (!debug)
+    return 0;
+
+  DataExtractor rel_data;
+  DataExtractor symtab_data;
+  DataExtractor debug_data;
+
+  if (GetData(rel->GetFileOffset(), rel->GetFileSize(), rel_data) &&
+      GetData(symtab->GetFileOffset(), symtab->GetFileSize(), symtab_data) &&
+      GetData(debug->GetFileOffset(), debug->GetFileSize(), debug_data)) {
+    ApplyRelocations(thetab, &m_header, rel_hdr, symtab_hdr, debug_hdr,
+                     rel_data, symtab_data, debug_data, debug);
+  }
+
+  return 0;
+}
+
+Symtab *ObjectFileELF::GetSymtab() {
+  ModuleSP module_sp(GetModule());
+  if (!module_sp)
+    return nullptr;
+
+  // We always want to use the main object file so we (hopefully) only have one
+  // cached copy of our symtab, dynamic sections, etc.
+  ObjectFile *module_obj_file = module_sp->GetObjectFile();
+  if (module_obj_file && module_obj_file != this)
+    return module_obj_file->GetSymtab();
+
+  if (m_symtab_up == nullptr) {
+    SectionList *section_list = module_sp->GetSectionList();
+    if (!section_list)
+      return nullptr;
+
+    uint64_t symbol_id = 0;
+    std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
+
+    // Sharable objects and dynamic executables usually have 2 distinct symbol
+    // tables, one named ".symtab", and the other ".dynsym". The dynsym is a
+    // smaller version of the symtab that only contains global symbols. The
+    // information found in the dynsym is therefore also found in the symtab,
+    // while the reverse is not necessarily true.
+    Section *symtab =
+        section_list->FindSectionByType(eSectionTypeELFSymbolTable, true).get();
+    if (symtab) {
+      m_symtab_up.reset(new Symtab(symtab->GetObjectFile()));
+      symbol_id += ParseSymbolTable(m_symtab_up.get(), symbol_id, symtab);
+    }
+
+    // The symtab section is non-allocable and can be stripped, while the
+    // .dynsym section which should always be always be there. To support the
+    // minidebuginfo case we parse .dynsym when there's a .gnu_debuginfo
+    // section, nomatter if .symtab was already parsed or not. This is because
+    // minidebuginfo normally removes the .symtab symbols which have their
+    // matching .dynsym counterparts.
+    if (!symtab ||
+        GetSectionList()->FindSectionByName(ConstString(".gnu_debugdata"))) {
+      Section *dynsym =
+          section_list->FindSectionByType(eSectionTypeELFDynamicSymbols, true)
+              .get();
+      if (dynsym) {
+        if (!m_symtab_up)
+          m_symtab_up.reset(new Symtab(dynsym->GetObjectFile()));
+        symbol_id += ParseSymbolTable(m_symtab_up.get(), symbol_id, dynsym);
+      }
+    }
+
+    // DT_JMPREL
+    //      If present, this entry's d_ptr member holds the address of
+    //      relocation
+    //      entries associated solely with the procedure linkage table.
+    //      Separating
+    //      these relocation entries lets the dynamic linker ignore them during
+    //      process initialization, if lazy binding is enabled. If this entry is
+    //      present, the related entries of types DT_PLTRELSZ and DT_PLTREL must
+    //      also be present.
+    const ELFDynamic *symbol = FindDynamicSymbol(DT_JMPREL);
+    if (symbol) {
+      const ELFDynamic *pltrelsz = FindDynamicSymbol(DT_PLTRELSZ);
+      assert(pltrelsz != NULL);
+      // Synthesize trampoline symbols to help navigate the PLT.
+      addr_t addr = symbol->d_ptr;
+      Section *reloc_section =
+          section_list->FindSectionContainingFileAddress(addr).get();
+      if (reloc_section && pltrelsz->d_val > 0) {
+        user_id_t reloc_id = reloc_section->GetID();
+        const ELFSectionHeaderInfo *reloc_header =
+            GetSectionHeaderByIndex(reloc_id);
+        assert(reloc_header);
+
+        if (m_symtab_up == nullptr)
+          m_symtab_up.reset(new Symtab(reloc_section->GetObjectFile()));
+
+        ParseTrampolineSymbols(m_symtab_up.get(), symbol_id, reloc_header,
+                               reloc_id);
+      }
+    }
+
+    if (DWARFCallFrameInfo *eh_frame =
+            GetModule()->GetUnwindTable().GetEHFrameInfo()) {
+      if (m_symtab_up == nullptr)
+        m_symtab_up.reset(new Symtab(this));
+      ParseUnwindSymbols(m_symtab_up.get(), eh_frame);
+    }
+
+    // If we still don't have any symtab then create an empty instance to avoid
+    // do the section lookup next time.
+    if (m_symtab_up == nullptr)
+      m_symtab_up.reset(new Symtab(this));
+
+    // In the event that there's no symbol entry for the entry point we'll
+    // artifically create one. We delegate to the symtab object the figuring
+    // out of the proper size, this will usually make it span til the next
+    // symbol it finds in the section. This means that if there are missing
+    // symbols the entry point might span beyond its function definition.
+    // We're fine with this as it doesn't make it worse than not having a
+    // symbol entry at all.
+    if (CalculateType() == eTypeExecutable) {
+      ArchSpec arch = GetArchitecture();
+      auto entry_point_addr = GetEntryPointAddress();
+      bool is_valid_entry_point =
+          entry_point_addr.IsValid() && entry_point_addr.IsSectionOffset();
+      addr_t entry_point_file_addr = entry_point_addr.GetFileAddress();
+      if (is_valid_entry_point && !m_symtab_up->FindSymbolContainingFileAddress(
+                                      entry_point_file_addr)) {
+        uint64_t symbol_id = m_symtab_up->GetNumSymbols();
+        Symbol symbol(symbol_id,
+                      GetNextSyntheticSymbolName().GetCString(), // Symbol name.
+                      eSymbolTypeCode, // Type of this symbol.
+                      true,            // Is this globally visible?
+                      false,           // Is this symbol debug info?
+                      false,           // Is this symbol a trampoline?
+                      true,            // Is this symbol artificial?
+                      entry_point_addr.GetSection(), // Section where this
+                                                     // symbol is defined.
+                      0,     // Offset in section or symbol value.
+                      0,     // Size.
+                      false, // Size is valid.
+                      false, // Contains linker annotations?
+                      0);    // Symbol flags.
+        m_symtab_up->AddSymbol(symbol);
+        // When the entry point is arm thumb we need to explicitly set its
+        // class address to reflect that. This is important because expression
+        // evaluation relies on correctly setting a breakpoint at this
+        // address.
+        if (arch.GetMachine() == llvm::Triple::arm &&
+            (entry_point_file_addr & 1))
+          m_address_class_map[entry_point_file_addr ^ 1] =
+              AddressClass::eCodeAlternateISA;
+        else
+          m_address_class_map[entry_point_file_addr] = AddressClass::eCode;
+      }
+    }
+
+    m_symtab_up->CalculateSymbolSizes();
+  }
+
+  return m_symtab_up.get();
+}
+
+void ObjectFileELF::RelocateSection(lldb_private::Section *section)
+{
+  static const char *debug_prefix = ".debug";
+
+  // Set relocated bit so we stop getting called, regardless of whether we
+  // actually relocate.
+  section->SetIsRelocated(true);
+
+  // We only relocate in ELF relocatable files
+  if (CalculateType() != eTypeObjectFile)
+    return;
+
+  const char *section_name = section->GetName().GetCString();
+  // Can't relocate that which can't be named
+  if (section_name == nullptr)
+    return;
+
+  // We don't relocate non-debug sections at the moment
+  if (strncmp(section_name, debug_prefix, strlen(debug_prefix)))
+    return;
+
+  // Relocation section names to look for
+  std::string needle = std::string(".rel") + section_name;
+  std::string needlea = std::string(".rela") + section_name;
+
+  for (SectionHeaderCollIter I = m_section_headers.begin();
+       I != m_section_headers.end(); ++I) {
+    if (I->sh_type == SHT_RELA || I->sh_type == SHT_REL) {
+      const char *hay_name = I->section_name.GetCString();
+      if (hay_name == nullptr)
+        continue;
+      if (needle == hay_name || needlea == hay_name) {
+        const ELFSectionHeader &reloc_header = *I;
+        user_id_t reloc_id = SectionIndex(I);
+        RelocateDebugSections(&reloc_header, reloc_id, GetSymtab());
+        break;
+      }
+    }
+  }
+}
+
+void ObjectFileELF::ParseUnwindSymbols(Symtab *symbol_table,
+                                       DWARFCallFrameInfo *eh_frame) {
+  SectionList *section_list = GetSectionList();
+  if (!section_list)
+    return;
+
+  // First we save the new symbols into a separate list and add them to the
+  // symbol table after we colleced all symbols we want to add. This is
+  // neccessary because adding a new symbol invalidates the internal index of
+  // the symtab what causing the next lookup to be slow because it have to
+  // recalculate the index first.
+  std::vector<Symbol> new_symbols;
+
+  eh_frame->ForEachFDEEntries([this, symbol_table, section_list, &new_symbols](
+      lldb::addr_t file_addr, uint32_t size, dw_offset_t) {
+    Symbol *symbol = symbol_table->FindSymbolAtFileAddress(file_addr);
+    if (symbol) {
+      if (!symbol->GetByteSizeIsValid()) {
+        symbol->SetByteSize(size);
+        symbol->SetSizeIsSynthesized(true);
+      }
+    } else {
+      SectionSP section_sp =
+          section_list->FindSectionContainingFileAddress(file_addr);
+      if (section_sp) {
+        addr_t offset = file_addr - section_sp->GetFileAddress();
+        const char *symbol_name = GetNextSyntheticSymbolName().GetCString();
+        uint64_t symbol_id = symbol_table->GetNumSymbols();
+        Symbol eh_symbol(
+            symbol_id,       // Symbol table index.
+            symbol_name,     // Symbol name.
+            eSymbolTypeCode, // Type of this symbol.
+            true,            // Is this globally visible?
+            false,           // Is this symbol debug info?
+            false,           // Is this symbol a trampoline?
+            true,            // Is this symbol artificial?
+            section_sp,      // Section in which this symbol is defined or null.
+            offset,          // Offset in section or symbol value.
+            0,     // Size:          Don't specify the size as an FDE can
+            false, // Size is valid: cover multiple symbols.
+            false, // Contains linker annotations?
+            0);    // Symbol flags.
+        new_symbols.push_back(eh_symbol);
+      }
+    }
+    return true;
+  });
+
+  for (const Symbol &s : new_symbols)
+    symbol_table->AddSymbol(s);
+}
+
+bool ObjectFileELF::IsStripped() {
+  // TODO: determine this for ELF
+  return false;
+}
+
+//===----------------------------------------------------------------------===//
+// Dump
+//
+// Dump the specifics of the runtime file container (such as any headers
+// segments, sections, etc).
+void ObjectFileELF::Dump(Stream *s) {
+  ModuleSP module_sp(GetModule());
+  if (!module_sp) {
+    return;
+  }
+
+  std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
+  s->Printf("%p: ", static_cast<void *>(this));
+  s->Indent();
+  s->PutCString("ObjectFileELF");
+
+  ArchSpec header_arch = GetArchitecture();
+
+  *s << ", file = '" << m_file
+     << "', arch = " << header_arch.GetArchitectureName() << "\n";
+
+  DumpELFHeader(s, m_header);
+  s->EOL();
+  DumpELFProgramHeaders(s);
+  s->EOL();
+  DumpELFSectionHeaders(s);
+  s->EOL();
+  SectionList *section_list = GetSectionList();
+  if (section_list)
+    section_list->Dump(s, nullptr, true, UINT32_MAX);
+  Symtab *symtab = GetSymtab();
+  if (symtab)
+    symtab->Dump(s, nullptr, eSortOrderNone);
+  s->EOL();
+  DumpDependentModules(s);
+  s->EOL();
+}
+
+// DumpELFHeader
+//
+// Dump the ELF header to the specified output stream
+void ObjectFileELF::DumpELFHeader(Stream *s, const ELFHeader &header) {
+  s->PutCString("ELF Header\n");
+  s->Printf("e_ident[EI_MAG0   ] = 0x%2.2x\n", header.e_ident[EI_MAG0]);
+  s->Printf("e_ident[EI_MAG1   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG1],
+            header.e_ident[EI_MAG1]);
+  s->Printf("e_ident[EI_MAG2   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG2],
+            header.e_ident[EI_MAG2]);
+  s->Printf("e_ident[EI_MAG3   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG3],
+            header.e_ident[EI_MAG3]);
+
+  s->Printf("e_ident[EI_CLASS  ] = 0x%2.2x\n", header.e_ident[EI_CLASS]);
+  s->Printf("e_ident[EI_DATA   ] = 0x%2.2x ", header.e_ident[EI_DATA]);
+  DumpELFHeader_e_ident_EI_DATA(s, header.e_ident[EI_DATA]);
+  s->Printf("\ne_ident[EI_VERSION] = 0x%2.2x\n", header.e_ident[EI_VERSION]);
+  s->Printf("e_ident[EI_PAD    ] = 0x%2.2x\n", header.e_ident[EI_PAD]);
+
+  s->Printf("e_type      = 0x%4.4x ", header.e_type);
+  DumpELFHeader_e_type(s, header.e_type);
+  s->Printf("\ne_machine   = 0x%4.4x\n", header.e_machine);
+  s->Printf("e_version   = 0x%8.8x\n", header.e_version);
+  s->Printf("e_entry     = 0x%8.8" PRIx64 "\n", header.e_entry);
+  s->Printf("e_phoff     = 0x%8.8" PRIx64 "\n", header.e_phoff);
+  s->Printf("e_shoff     = 0x%8.8" PRIx64 "\n", header.e_shoff);
+  s->Printf("e_flags     = 0x%8.8x\n", header.e_flags);
+  s->Printf("e_ehsize    = 0x%4.4x\n", header.e_ehsize);
+  s->Printf("e_phentsize = 0x%4.4x\n", header.e_phentsize);
+  s->Printf("e_phnum     = 0x%8.8x\n", header.e_phnum);
+  s->Printf("e_shentsize = 0x%4.4x\n", header.e_shentsize);
+  s->Printf("e_shnum     = 0x%8.8x\n", header.e_shnum);
+  s->Printf("e_shstrndx  = 0x%8.8x\n", header.e_shstrndx);
+}
+
+// DumpELFHeader_e_type
+//
+// Dump an token value for the ELF header member e_type
+void ObjectFileELF::DumpELFHeader_e_type(Stream *s, elf_half e_type) {
+  switch (e_type) {
+  case ET_NONE:
+    *s << "ET_NONE";
+    break;
+  case ET_REL:
+    *s << "ET_REL";
+    break;
+  case ET_EXEC:
+    *s << "ET_EXEC";
+    break;
+  case ET_DYN:
+    *s << "ET_DYN";
+    break;
+  case ET_CORE:
+    *s << "ET_CORE";
+    break;
+  default:
+    break;
+  }
+}
+
+// DumpELFHeader_e_ident_EI_DATA
+//
+// Dump an token value for the ELF header member e_ident[EI_DATA]
+void ObjectFileELF::DumpELFHeader_e_ident_EI_DATA(Stream *s,
+                                                  unsigned char ei_data) {
+  switch (ei_data) {
+  case ELFDATANONE:
+    *s << "ELFDATANONE";
+    break;
+  case ELFDATA2LSB:
+    *s << "ELFDATA2LSB - Little Endian";
+    break;
+  case ELFDATA2MSB:
+    *s << "ELFDATA2MSB - Big Endian";
+    break;
+  default:
+    break;
+  }
+}
+
+// DumpELFProgramHeader
+//
+// Dump a single ELF program header to the specified output stream
+void ObjectFileELF::DumpELFProgramHeader(Stream *s,
+                                         const ELFProgramHeader &ph) {
+  DumpELFProgramHeader_p_type(s, ph.p_type);
+  s->Printf(" %8.8" PRIx64 " %8.8" PRIx64 " %8.8" PRIx64, ph.p_offset,
+            ph.p_vaddr, ph.p_paddr);
+  s->Printf(" %8.8" PRIx64 " %8.8" PRIx64 " %8.8x (", ph.p_filesz, ph.p_memsz,
+            ph.p_flags);
+
+  DumpELFProgramHeader_p_flags(s, ph.p_flags);
+  s->Printf(") %8.8" PRIx64, ph.p_align);
+}
+
+// DumpELFProgramHeader_p_type
+//
+// Dump an token value for the ELF program header member p_type which describes
+// the type of the program header
+void ObjectFileELF::DumpELFProgramHeader_p_type(Stream *s, elf_word p_type) {
+  const int kStrWidth = 15;
+  switch (p_type) {
+    CASE_AND_STREAM(s, PT_NULL, kStrWidth);
+    CASE_AND_STREAM(s, PT_LOAD, kStrWidth);
+    CASE_AND_STREAM(s, PT_DYNAMIC, kStrWidth);
+    CASE_AND_STREAM(s, PT_INTERP, kStrWidth);
+    CASE_AND_STREAM(s, PT_NOTE, kStrWidth);
+    CASE_AND_STREAM(s, PT_SHLIB, kStrWidth);
+    CASE_AND_STREAM(s, PT_PHDR, kStrWidth);
+    CASE_AND_STREAM(s, PT_TLS, kStrWidth);
+    CASE_AND_STREAM(s, PT_GNU_EH_FRAME, kStrWidth);
+  default:
+    s->Printf("0x%8.8x%*s", p_type, kStrWidth - 10, "");
+    break;
+  }
+}
+
+// DumpELFProgramHeader_p_flags
+//
+// Dump an token value for the ELF program header member p_flags
+void ObjectFileELF::DumpELFProgramHeader_p_flags(Stream *s, elf_word p_flags) {
+  *s << ((p_flags & PF_X) ? "PF_X" : "    ")
+     << (((p_flags & PF_X) && (p_flags & PF_W)) ? '+' : ' ')
+     << ((p_flags & PF_W) ? "PF_W" : "    ")
+     << (((p_flags & PF_W) && (p_flags & PF_R)) ? '+' : ' ')
+     << ((p_flags & PF_R) ? "PF_R" : "    ");
+}
+
+// DumpELFProgramHeaders
+//
+// Dump all of the ELF program header to the specified output stream
+void ObjectFileELF::DumpELFProgramHeaders(Stream *s) {
+  if (!ParseProgramHeaders())
+    return;
+
+  s->PutCString("Program Headers\n");
+  s->PutCString("IDX  p_type          p_offset p_vaddr  p_paddr  "
+                "p_filesz p_memsz  p_flags                   p_align\n");
+  s->PutCString("==== --------------- -------- -------- -------- "
+                "-------- -------- ------------------------- --------\n");
+
+  for (const auto &H : llvm::enumerate(m_program_headers)) {
+    s->Format("[{0,2}] ", H.index());
+    ObjectFileELF::DumpELFProgramHeader(s, H.value());
+    s->EOL();
+  }
+}
+
+// DumpELFSectionHeader
+//
+// Dump a single ELF section header to the specified output stream
+void ObjectFileELF::DumpELFSectionHeader(Stream *s,
+                                         const ELFSectionHeaderInfo &sh) {
+  s->Printf("%8.8x ", sh.sh_name);
+  DumpELFSectionHeader_sh_type(s, sh.sh_type);
+  s->Printf(" %8.8" PRIx64 " (", sh.sh_flags);
+  DumpELFSectionHeader_sh_flags(s, sh.sh_flags);
+  s->Printf(") %8.8" PRIx64 " %8.8" PRIx64 " %8.8" PRIx64, sh.sh_addr,
+            sh.sh_offset, sh.sh_size);
+  s->Printf(" %8.8x %8.8x", sh.sh_link, sh.sh_info);
+  s->Printf(" %8.8" PRIx64 " %8.8" PRIx64, sh.sh_addralign, sh.sh_entsize);
+}
+
+// DumpELFSectionHeader_sh_type
+//
+// Dump an token value for the ELF section header member sh_type which
+// describes the type of the section
+void ObjectFileELF::DumpELFSectionHeader_sh_type(Stream *s, elf_word sh_type) {
+  const int kStrWidth = 12;
+  switch (sh_type) {
+    CASE_AND_STREAM(s, SHT_NULL, kStrWidth);
+    CASE_AND_STREAM(s, SHT_PROGBITS, kStrWidth);
+    CASE_AND_STREAM(s, SHT_SYMTAB, kStrWidth);
+    CASE_AND_STREAM(s, SHT_STRTAB, kStrWidth);
+    CASE_AND_STREAM(s, SHT_RELA, kStrWidth);
+    CASE_AND_STREAM(s, SHT_HASH, kStrWidth);
+    CASE_AND_STREAM(s, SHT_DYNAMIC, kStrWidth);
+    CASE_AND_STREAM(s, SHT_NOTE, kStrWidth);
+    CASE_AND_STREAM(s, SHT_NOBITS, kStrWidth);
+    CASE_AND_STREAM(s, SHT_REL, kStrWidth);
+    CASE_AND_STREAM(s, SHT_SHLIB, kStrWidth);
+    CASE_AND_STREAM(s, SHT_DYNSYM, kStrWidth);
+    CASE_AND_STREAM(s, SHT_LOPROC, kStrWidth);
+    CASE_AND_STREAM(s, SHT_HIPROC, kStrWidth);
+    CASE_AND_STREAM(s, SHT_LOUSER, kStrWidth);
+    CASE_AND_STREAM(s, SHT_HIUSER, kStrWidth);
+  default:
+    s->Printf("0x%8.8x%*s", sh_type, kStrWidth - 10, "");
+    break;
+  }
+}
+
+// DumpELFSectionHeader_sh_flags
+//
+// Dump an token value for the ELF section header member sh_flags
+void ObjectFileELF::DumpELFSectionHeader_sh_flags(Stream *s,
+                                                  elf_xword sh_flags) {
+  *s << ((sh_flags & SHF_WRITE) ? "WRITE" : "     ")
+     << (((sh_flags & SHF_WRITE) && (sh_flags & SHF_ALLOC)) ? '+' : ' ')
+     << ((sh_flags & SHF_ALLOC) ? "ALLOC" : "     ")
+     << (((sh_flags & SHF_ALLOC) && (sh_flags & SHF_EXECINSTR)) ? '+' : ' ')
+     << ((sh_flags & SHF_EXECINSTR) ? "EXECINSTR" : "         ");
+}
+
+// DumpELFSectionHeaders
+//
+// Dump all of the ELF section header to the specified output stream
+void ObjectFileELF::DumpELFSectionHeaders(Stream *s) {
+  if (!ParseSectionHeaders())
+    return;
+
+  s->PutCString("Section Headers\n");
+  s->PutCString("IDX  name     type         flags                            "
+                "addr     offset   size     link     info     addralgn "
+                "entsize  Name\n");
+  s->PutCString("==== -------- ------------ -------------------------------- "
+                "-------- -------- -------- -------- -------- -------- "
+                "-------- ====================\n");
+
+  uint32_t idx = 0;
+  for (SectionHeaderCollConstIter I = m_section_headers.begin();
+       I != m_section_headers.end(); ++I, ++idx) {
+    s->Printf("[%2u] ", idx);
+    ObjectFileELF::DumpELFSectionHeader(s, *I);
+    const char *section_name = I->section_name.AsCString("");
+    if (section_name)
+      *s << ' ' << section_name << "\n";
+  }
+}
+
+void ObjectFileELF::DumpDependentModules(lldb_private::Stream *s) {
+  size_t num_modules = ParseDependentModules();
+
+  if (num_modules > 0) {
+    s->PutCString("Dependent Modules:\n");
+    for (unsigned i = 0; i < num_modules; ++i) {
+      const FileSpec &spec = m_filespec_up->GetFileSpecAtIndex(i);
+      s->Printf("   %s\n", spec.GetFilename().GetCString());
+    }
+  }
+}
+
+ArchSpec ObjectFileELF::GetArchitecture() {
+  if (!ParseHeader())
+    return ArchSpec();
+
+  if (m_section_headers.empty()) {
+    // Allow elf notes to be parsed which may affect the detected architecture.
+    ParseSectionHeaders();
+  }
+
+  if (CalculateType() == eTypeCoreFile &&
+      !m_arch_spec.TripleOSWasSpecified()) {
+    // Core files don't have section headers yet they have PT_NOTE program
+    // headers that might shed more light on the architecture
+    for (const elf::ELFProgramHeader &H : ProgramHeaders()) {
+      if (H.p_type != PT_NOTE || H.p_offset == 0 || H.p_filesz == 0)
+        continue;
+      DataExtractor data;
+      if (data.SetData(m_data, H.p_offset, H.p_filesz) == H.p_filesz) {
+        UUID uuid;
+        RefineModuleDetailsFromNote(data, m_arch_spec, uuid);
+      }
+    }
+  }
+  return m_arch_spec;
+}
+
+ObjectFile::Type ObjectFileELF::CalculateType() {
+  switch (m_header.e_type) {
+  case llvm::ELF::ET_NONE:
+    // 0 - No file type
+    return eTypeUnknown;
+
+  case llvm::ELF::ET_REL:
+    // 1 - Relocatable file
+    return eTypeObjectFile;
+
+  case llvm::ELF::ET_EXEC:
+    // 2 - Executable file
+    return eTypeExecutable;
+
+  case llvm::ELF::ET_DYN:
+    // 3 - Shared object file
+    return eTypeSharedLibrary;
+
+  case ET_CORE:
+    // 4 - Core file
+    return eTypeCoreFile;
+
+  default:
+    break;
+  }
+  return eTypeUnknown;
+}
+
+ObjectFile::Strata ObjectFileELF::CalculateStrata() {
+  switch (m_header.e_type) {
+  case llvm::ELF::ET_NONE:
+    // 0 - No file type
+    return eStrataUnknown;
+
+  case llvm::ELF::ET_REL:
+    // 1 - Relocatable file
+    return eStrataUnknown;
+
+  case llvm::ELF::ET_EXEC:
+    // 2 - Executable file
+    // TODO: is there any way to detect that an executable is a kernel
+    // related executable by inspecting the program headers, section headers,
+    // symbols, or any other flag bits???
+    return eStrataUser;
+
+  case llvm::ELF::ET_DYN:
+    // 3 - Shared object file
+    // TODO: is there any way to detect that an shared library is a kernel
+    // related executable by inspecting the program headers, section headers,
+    // symbols, or any other flag bits???
+    return eStrataUnknown;
+
+  case ET_CORE:
+    // 4 - Core file
+    // TODO: is there any way to detect that an core file is a kernel
+    // related executable by inspecting the program headers, section headers,
+    // symbols, or any other flag bits???
+    return eStrataUnknown;
+
+  default:
+    break;
+  }
+  return eStrataUnknown;
+}
+
+size_t ObjectFileELF::ReadSectionData(Section *section,
+                       lldb::offset_t section_offset, void *dst,
+                       size_t dst_len) {
+  // If some other objectfile owns this data, pass this to them.
+  if (section->GetObjectFile() != this)
+    return section->GetObjectFile()->ReadSectionData(section, section_offset,
+                                                     dst, dst_len);
+
+  if (!section->Test(SHF_COMPRESSED))
+    return ObjectFile::ReadSectionData(section, section_offset, dst, dst_len);
+
+  // For compressed sections we need to read to full data to be able to
+  // decompress.
+  DataExtractor data;
+  ReadSectionData(section, data);
+  return data.CopyData(section_offset, dst_len, dst);
+}
+
+size_t ObjectFileELF::ReadSectionData(Section *section,
+                                      DataExtractor &section_data) {
+  // If some other objectfile owns this data, pass this to them.
+  if (section->GetObjectFile() != this)
+    return section->GetObjectFile()->ReadSectionData(section, section_data);
+
+  size_t result = ObjectFile::ReadSectionData(section, section_data);
+  if (result == 0 || !llvm::object::Decompressor::isCompressedELFSection(
+                         section->Get(), section->GetName().GetStringRef()))
+    return result;
+
+  auto Decompressor = llvm::object::Decompressor::create(
+      section->GetName().GetStringRef(),
+      {reinterpret_cast<const char *>(section_data.GetDataStart()),
+       size_t(section_data.GetByteSize())},
+      GetByteOrder() == eByteOrderLittle, GetAddressByteSize() == 8);
+  if (!Decompressor) {
+    GetModule()->ReportWarning(
+        "Unable to initialize decompressor for section '%s': %s",
+        section->GetName().GetCString(),
+        llvm::toString(Decompressor.takeError()).c_str());
+    section_data.Clear();
+    return 0;
+  }
+
+  auto buffer_sp =
+      std::make_shared<DataBufferHeap>(Decompressor->getDecompressedSize(), 0);
+  if (auto error = Decompressor->decompress(
+          {reinterpret_cast<char *>(buffer_sp->GetBytes()),
+           size_t(buffer_sp->GetByteSize())})) {
+    GetModule()->ReportWarning(
+        "Decompression of section '%s' failed: %s",
+        section->GetName().GetCString(),
+        llvm::toString(std::move(error)).c_str());
+    section_data.Clear();
+    return 0;
+  }
+
+  section_data.SetData(buffer_sp);
+  return buffer_sp->GetByteSize();
+}
+
+llvm::ArrayRef<ELFProgramHeader> ObjectFileELF::ProgramHeaders() {
+  ParseProgramHeaders();
+  return m_program_headers;
+}
+
+DataExtractor ObjectFileELF::GetSegmentData(const ELFProgramHeader &H) {
+  return DataExtractor(m_data, H.p_offset, H.p_filesz);
+}
+
+bool ObjectFileELF::AnySegmentHasPhysicalAddress() {
+  for (const ELFProgramHeader &H : ProgramHeaders()) {
+    if (H.p_paddr != 0)
+      return true;
+  }
+  return false;
+}
+
+std::vector<ObjectFile::LoadableData>
+ObjectFileELF::GetLoadableData(Target &target) {
+  // Create a list of loadable data from loadable segments, using physical
+  // addresses if they aren't all null
+  std::vector<LoadableData> loadables;
+  bool should_use_paddr = AnySegmentHasPhysicalAddress();
+  for (const ELFProgramHeader &H : ProgramHeaders()) {
+    LoadableData loadable;
+    if (H.p_type != llvm::ELF::PT_LOAD)
+      continue;
+    loadable.Dest = should_use_paddr ? H.p_paddr : H.p_vaddr;
+    if (loadable.Dest == LLDB_INVALID_ADDRESS)
+      continue;
+    if (H.p_filesz == 0)
+      continue;
+    auto segment_data = GetSegmentData(H);
+    loadable.Contents = llvm::ArrayRef<uint8_t>(segment_data.GetDataStart(),
+                                                segment_data.GetByteSize());
+    loadables.push_back(loadable);
+  }
+  return loadables;
+}