YQ Connector: support managed ClickHouse

Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.

1 files changed, 1955 insertions, 0 deletions

diff --git a/contrib/libs/llvm16/lib/Object/COFFObjectFile.cpp b/contrib/libs/llvm16/lib/Object/COFFObjectFile.cpp
new file mode 100644
index 0000000000..b159ae1bba
--- /dev/null
+++ b/contrib/libs/llvm16/lib/Object/COFFObjectFile.cpp
@@ -0,0 +1,1955 @@
+//===- COFFObjectFile.cpp - COFF object file implementation ---------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the COFFObjectFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/BinaryFormat/COFF.h"
+#include "llvm/Object/Binary.h"
+#include "llvm/Object/COFF.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/MemoryBufferRef.h"
+#include <algorithm>
+#include <cassert>
+#include <cinttypes>
+#include <cstddef>
+#include <cstring>
+#include <limits>
+#include <memory>
+#include <system_error>
+
+using namespace llvm;
+using namespace object;
+
+using support::ulittle16_t;
+using support::ulittle32_t;
+using support::ulittle64_t;
+using support::little16_t;
+
+// Returns false if size is greater than the buffer size. And sets ec.
+static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) {
+  if (M.getBufferSize() < Size) {
+    EC = object_error::unexpected_eof;
+    return false;
+  }
+  return true;
+}
+
+// Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
+// Returns unexpected_eof if error.
+template <typename T>
+static Error getObject(const T *&Obj, MemoryBufferRef M, const void *Ptr,
+                       const uint64_t Size = sizeof(T)) {
+  uintptr_t Addr = reinterpret_cast<uintptr_t>(Ptr);
+  if (Error E = Binary::checkOffset(M, Addr, Size))
+    return E;
+  Obj = reinterpret_cast<const T *>(Addr);
+  return Error::success();
+}
+
+// Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without
+// prefixed slashes.
+static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) {
+  assert(Str.size() <= 6 && "String too long, possible overflow.");
+  if (Str.size() > 6)
+    return true;
+
+  uint64_t Value = 0;
+  while (!Str.empty()) {
+    unsigned CharVal;
+    if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25
+      CharVal = Str[0] - 'A';
+    else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51
+      CharVal = Str[0] - 'a' + 26;
+    else if (Str[0] >= '0' && Str[0] <= '9') // 52..61
+      CharVal = Str[0] - '0' + 52;
+    else if (Str[0] == '+') // 62
+      CharVal = 62;
+    else if (Str[0] == '/') // 63
+      CharVal = 63;
+    else
+      return true;
+
+    Value = (Value * 64) + CharVal;
+    Str = Str.substr(1);
+  }
+
+  if (Value > std::numeric_limits<uint32_t>::max())
+    return true;
+
+  Result = static_cast<uint32_t>(Value);
+  return false;
+}
+
+template <typename coff_symbol_type>
+const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const {
+  const coff_symbol_type *Addr =
+      reinterpret_cast<const coff_symbol_type *>(Ref.p);
+
+  assert(!checkOffset(Data, reinterpret_cast<uintptr_t>(Addr), sizeof(*Addr)));
+#ifndef NDEBUG
+  // Verify that the symbol points to a valid entry in the symbol table.
+  uintptr_t Offset =
+      reinterpret_cast<uintptr_t>(Addr) - reinterpret_cast<uintptr_t>(base());
+
+  assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 &&
+         "Symbol did not point to the beginning of a symbol");
+#endif
+
+  return Addr;
+}
+
+const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const {
+  const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p);
+
+#ifndef NDEBUG
+  // Verify that the section points to a valid entry in the section table.
+  if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections()))
+    report_fatal_error("Section was outside of section table.");
+
+  uintptr_t Offset = reinterpret_cast<uintptr_t>(Addr) -
+                     reinterpret_cast<uintptr_t>(SectionTable);
+  assert(Offset % sizeof(coff_section) == 0 &&
+         "Section did not point to the beginning of a section");
+#endif
+
+  return Addr;
+}
+
+void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const {
+  auto End = reinterpret_cast<uintptr_t>(StringTable);
+  if (SymbolTable16) {
+    const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref);
+    Symb += 1 + Symb->NumberOfAuxSymbols;
+    Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
+  } else if (SymbolTable32) {
+    const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref);
+    Symb += 1 + Symb->NumberOfAuxSymbols;
+    Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
+  } else {
+    llvm_unreachable("no symbol table pointer!");
+  }
+}
+
+Expected<StringRef> COFFObjectFile::getSymbolName(DataRefImpl Ref) const {
+  return getSymbolName(getCOFFSymbol(Ref));
+}
+
+uint64_t COFFObjectFile::getSymbolValueImpl(DataRefImpl Ref) const {
+  return getCOFFSymbol(Ref).getValue();
+}
+
+uint32_t COFFObjectFile::getSymbolAlignment(DataRefImpl Ref) const {
+  // MSVC/link.exe seems to align symbols to the next-power-of-2
+  // up to 32 bytes.
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  return std::min(uint64_t(32), PowerOf2Ceil(Symb.getValue()));
+}
+
+Expected<uint64_t> COFFObjectFile::getSymbolAddress(DataRefImpl Ref) const {
+  uint64_t Result = cantFail(getSymbolValue(Ref));
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  int32_t SectionNumber = Symb.getSectionNumber();
+
+  if (Symb.isAnyUndefined() || Symb.isCommon() ||
+      COFF::isReservedSectionNumber(SectionNumber))
+    return Result;
+
+  Expected<const coff_section *> Section = getSection(SectionNumber);
+  if (!Section)
+    return Section.takeError();
+  Result += (*Section)->VirtualAddress;
+
+  // The section VirtualAddress does not include ImageBase, and we want to
+  // return virtual addresses.
+  Result += getImageBase();
+
+  return Result;
+}
+
+Expected<SymbolRef::Type> COFFObjectFile::getSymbolType(DataRefImpl Ref) const {
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  int32_t SectionNumber = Symb.getSectionNumber();
+
+  if (Symb.getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION)
+    return SymbolRef::ST_Function;
+  if (Symb.isAnyUndefined())
+    return SymbolRef::ST_Unknown;
+  if (Symb.isCommon())
+    return SymbolRef::ST_Data;
+  if (Symb.isFileRecord())
+    return SymbolRef::ST_File;
+
+  // TODO: perhaps we need a new symbol type ST_Section.
+  if (SectionNumber == COFF::IMAGE_SYM_DEBUG || Symb.isSectionDefinition())
+    return SymbolRef::ST_Debug;
+
+  if (!COFF::isReservedSectionNumber(SectionNumber))
+    return SymbolRef::ST_Data;
+
+  return SymbolRef::ST_Other;
+}
+
+Expected<uint32_t> COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const {
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  uint32_t Result = SymbolRef::SF_None;
+
+  if (Symb.isExternal() || Symb.isWeakExternal())
+    Result |= SymbolRef::SF_Global;
+
+  if (const coff_aux_weak_external *AWE = Symb.getWeakExternal()) {
+    Result |= SymbolRef::SF_Weak;
+    if (AWE->Characteristics != COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS)
+      Result |= SymbolRef::SF_Undefined;
+  }
+
+  if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE)
+    Result |= SymbolRef::SF_Absolute;
+
+  if (Symb.isFileRecord())
+    Result |= SymbolRef::SF_FormatSpecific;
+
+  if (Symb.isSectionDefinition())
+    Result |= SymbolRef::SF_FormatSpecific;
+
+  if (Symb.isCommon())
+    Result |= SymbolRef::SF_Common;
+
+  if (Symb.isUndefined())
+    Result |= SymbolRef::SF_Undefined;
+
+  return Result;
+}
+
+uint64_t COFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Ref) const {
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  return Symb.getValue();
+}
+
+Expected<section_iterator>
+COFFObjectFile::getSymbolSection(DataRefImpl Ref) const {
+  COFFSymbolRef Symb = getCOFFSymbol(Ref);
+  if (COFF::isReservedSectionNumber(Symb.getSectionNumber()))
+    return section_end();
+  Expected<const coff_section *> Sec = getSection(Symb.getSectionNumber());
+  if (!Sec)
+    return Sec.takeError();
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(*Sec);
+  return section_iterator(SectionRef(Ret, this));
+}
+
+unsigned COFFObjectFile::getSymbolSectionID(SymbolRef Sym) const {
+  COFFSymbolRef Symb = getCOFFSymbol(Sym.getRawDataRefImpl());
+  return Symb.getSectionNumber();
+}
+
+void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  Sec += 1;
+  Ref.p = reinterpret_cast<uintptr_t>(Sec);
+}
+
+Expected<StringRef> COFFObjectFile::getSectionName(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  return getSectionName(Sec);
+}
+
+uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  uint64_t Result = Sec->VirtualAddress;
+
+  // The section VirtualAddress does not include ImageBase, and we want to
+  // return virtual addresses.
+  Result += getImageBase();
+  return Result;
+}
+
+uint64_t COFFObjectFile::getSectionIndex(DataRefImpl Sec) const {
+  return toSec(Sec) - SectionTable;
+}
+
+uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const {
+  return getSectionSize(toSec(Ref));
+}
+
+Expected<ArrayRef<uint8_t>>
+COFFObjectFile::getSectionContents(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  ArrayRef<uint8_t> Res;
+  if (Error E = getSectionContents(Sec, Res))
+    return std::move(E);
+  return Res;
+}
+
+uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  return Sec->getAlignment();
+}
+
+bool COFFObjectFile::isSectionCompressed(DataRefImpl Sec) const {
+  return false;
+}
+
+bool COFFObjectFile::isSectionText(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
+}
+
+bool COFFObjectFile::isSectionData(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
+}
+
+bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
+                            COFF::IMAGE_SCN_MEM_READ |
+                            COFF::IMAGE_SCN_MEM_WRITE;
+  return (Sec->Characteristics & BssFlags) == BssFlags;
+}
+
+// The .debug sections are the only debug sections for COFF
+// (\see MCObjectFileInfo.cpp).
+bool COFFObjectFile::isDebugSection(DataRefImpl Ref) const {
+  Expected<StringRef> SectionNameOrErr = getSectionName(Ref);
+  if (!SectionNameOrErr) {
+    // TODO: Report the error message properly.
+    consumeError(SectionNameOrErr.takeError());
+    return false;
+  }
+  StringRef SectionName = SectionNameOrErr.get();
+  return SectionName.startswith(".debug");
+}
+
+unsigned COFFObjectFile::getSectionID(SectionRef Sec) const {
+  uintptr_t Offset =
+      Sec.getRawDataRefImpl().p - reinterpret_cast<uintptr_t>(SectionTable);
+  assert((Offset % sizeof(coff_section)) == 0);
+  return (Offset / sizeof(coff_section)) + 1;
+}
+
+bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  // In COFF, a virtual section won't have any in-file
+  // content, so the file pointer to the content will be zero.
+  return Sec->PointerToRawData == 0;
+}
+
+static uint32_t getNumberOfRelocations(const coff_section *Sec,
+                                       MemoryBufferRef M, const uint8_t *base) {
+  // The field for the number of relocations in COFF section table is only
+  // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to
+  // NumberOfRelocations field, and the actual relocation count is stored in the
+  // VirtualAddress field in the first relocation entry.
+  if (Sec->hasExtendedRelocations()) {
+    const coff_relocation *FirstReloc;
+    if (Error E = getObject(FirstReloc, M,
+                            reinterpret_cast<const coff_relocation *>(
+                                base + Sec->PointerToRelocations))) {
+      consumeError(std::move(E));
+      return 0;
+    }
+    // -1 to exclude this first relocation entry.
+    return FirstReloc->VirtualAddress - 1;
+  }
+  return Sec->NumberOfRelocations;
+}
+
+static const coff_relocation *
+getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) {
+  uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base);
+  if (!NumRelocs)
+    return nullptr;
+  auto begin = reinterpret_cast<const coff_relocation *>(
+      Base + Sec->PointerToRelocations);
+  if (Sec->hasExtendedRelocations()) {
+    // Skip the first relocation entry repurposed to store the number of
+    // relocations.
+    begin++;
+  }
+  if (auto E = Binary::checkOffset(M, reinterpret_cast<uintptr_t>(begin),
+                                   sizeof(coff_relocation) * NumRelocs)) {
+    consumeError(std::move(E));
+    return nullptr;
+  }
+  return begin;
+}
+
+relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  const coff_relocation *begin = getFirstReloc(Sec, Data, base());
+  if (begin && Sec->VirtualAddress != 0)
+    report_fatal_error("Sections with relocations should have an address of 0");
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(begin);
+  return relocation_iterator(RelocationRef(Ret, this));
+}
+
+relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const {
+  const coff_section *Sec = toSec(Ref);
+  const coff_relocation *I = getFirstReloc(Sec, Data, base());
+  if (I)
+    I += getNumberOfRelocations(Sec, Data, base());
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(I);
+  return relocation_iterator(RelocationRef(Ret, this));
+}
+
+// Initialize the pointer to the symbol table.
+Error COFFObjectFile::initSymbolTablePtr() {
+  if (COFFHeader)
+    if (Error E = getObject(
+            SymbolTable16, Data, base() + getPointerToSymbolTable(),
+            (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
+      return E;
+
+  if (COFFBigObjHeader)
+    if (Error E = getObject(
+            SymbolTable32, Data, base() + getPointerToSymbolTable(),
+            (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
+      return E;
+
+  // Find string table. The first four byte of the string table contains the
+  // total size of the string table, including the size field itself. If the
+  // string table is empty, the value of the first four byte would be 4.
+  uint32_t StringTableOffset = getPointerToSymbolTable() +
+                               getNumberOfSymbols() * getSymbolTableEntrySize();
+  const uint8_t *StringTableAddr = base() + StringTableOffset;
+  const ulittle32_t *StringTableSizePtr;
+  if (Error E = getObject(StringTableSizePtr, Data, StringTableAddr))
+    return E;
+  StringTableSize = *StringTableSizePtr;
+  if (Error E = getObject(StringTable, Data, StringTableAddr, StringTableSize))
+    return E;
+
+  // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some
+  // tools like cvtres write a size of 0 for an empty table instead of 4.
+  if (StringTableSize < 4)
+    StringTableSize = 4;
+
+  // Check that the string table is null terminated if has any in it.
+  if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)
+    return createStringError(object_error::parse_failed,
+                             "string table missing null terminator");
+  return Error::success();
+}
+
+uint64_t COFFObjectFile::getImageBase() const {
+  if (PE32Header)
+    return PE32Header->ImageBase;
+  else if (PE32PlusHeader)
+    return PE32PlusHeader->ImageBase;
+  // This actually comes up in practice.
+  return 0;
+}
+
+// Returns the file offset for the given VA.
+Error COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const {
+  uint64_t ImageBase = getImageBase();
+  uint64_t Rva = Addr - ImageBase;
+  assert(Rva <= UINT32_MAX);
+  return getRvaPtr((uint32_t)Rva, Res);
+}
+
+// Returns the file offset for the given RVA.
+Error COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res,
+                                const char *ErrorContext) const {
+  for (const SectionRef &S : sections()) {
+    const coff_section *Section = getCOFFSection(S);
+    uint32_t SectionStart = Section->VirtualAddress;
+    uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize;
+    if (SectionStart <= Addr && Addr < SectionEnd) {
+      // A table/directory entry can be pointing to somewhere in a stripped
+      // section, in an object that went through `objcopy --only-keep-debug`.
+      // In this case we don't want to cause the parsing of the object file to
+      // fail, otherwise it will be impossible to use this object as debug info
+      // in LLDB. Return SectionStrippedError here so that
+      // COFFObjectFile::initialize can ignore the error.
+      // Somewhat common binaries may have RVAs pointing outside of the
+      // provided raw data. Instead of rejecting the binaries, just
+      // treat the section as stripped for these purposes.
+      if (Section->SizeOfRawData < Section->VirtualSize &&
+          Addr >= SectionStart + Section->SizeOfRawData) {
+        return make_error<SectionStrippedError>();
+      }
+      uint32_t Offset = Addr - SectionStart;
+      Res = reinterpret_cast<uintptr_t>(base()) + Section->PointerToRawData +
+            Offset;
+      return Error::success();
+    }
+  }
+  if (ErrorContext)
+    return createStringError(object_error::parse_failed,
+                             "RVA 0x%" PRIx32 " for %s not found", Addr,
+                             ErrorContext);
+  return createStringError(object_error::parse_failed,
+                           "RVA 0x%" PRIx32 " not found", Addr);
+}
+
+Error COFFObjectFile::getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size,
+                                           ArrayRef<uint8_t> &Contents,
+                                           const char *ErrorContext) const {
+  for (const SectionRef &S : sections()) {
+    const coff_section *Section = getCOFFSection(S);
+    uint32_t SectionStart = Section->VirtualAddress;
+    // Check if this RVA is within the section bounds. Be careful about integer
+    // overflow.
+    uint32_t OffsetIntoSection = RVA - SectionStart;
+    if (SectionStart <= RVA && OffsetIntoSection < Section->VirtualSize &&
+        Size <= Section->VirtualSize - OffsetIntoSection) {
+      uintptr_t Begin = reinterpret_cast<uintptr_t>(base()) +
+                        Section->PointerToRawData + OffsetIntoSection;
+      Contents =
+          ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(Begin), Size);
+      return Error::success();
+    }
+  }
+  if (ErrorContext)
+    return createStringError(object_error::parse_failed,
+                             "RVA 0x%" PRIx32 " for %s not found", RVA,
+                             ErrorContext);
+  return createStringError(object_error::parse_failed,
+                           "RVA 0x%" PRIx32 " not found", RVA);
+}
+
+// Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name
+// table entry.
+Error COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint,
+                                  StringRef &Name) const {
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(Rva, IntPtr))
+    return E;
+  const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr);
+  Hint = *reinterpret_cast<const ulittle16_t *>(Ptr);
+  Name = StringRef(reinterpret_cast<const char *>(Ptr + 2));
+  return Error::success();
+}
+
+Error COFFObjectFile::getDebugPDBInfo(const debug_directory *DebugDir,
+                                      const codeview::DebugInfo *&PDBInfo,
+                                      StringRef &PDBFileName) const {
+  ArrayRef<uint8_t> InfoBytes;
+  if (Error E =
+          getRvaAndSizeAsBytes(DebugDir->AddressOfRawData, DebugDir->SizeOfData,
+                               InfoBytes, "PDB info"))
+    return E;
+  if (InfoBytes.size() < sizeof(*PDBInfo) + 1)
+    return createStringError(object_error::parse_failed, "PDB info too small");
+  PDBInfo = reinterpret_cast<const codeview::DebugInfo *>(InfoBytes.data());
+  InfoBytes = InfoBytes.drop_front(sizeof(*PDBInfo));
+  PDBFileName = StringRef(reinterpret_cast<const char *>(InfoBytes.data()),
+                          InfoBytes.size());
+  // Truncate the name at the first null byte. Ignore any padding.
+  PDBFileName = PDBFileName.split('\0').first;
+  return Error::success();
+}
+
+Error COFFObjectFile::getDebugPDBInfo(const codeview::DebugInfo *&PDBInfo,
+                                      StringRef &PDBFileName) const {
+  for (const debug_directory &D : debug_directories())
+    if (D.Type == COFF::IMAGE_DEBUG_TYPE_CODEVIEW)
+      return getDebugPDBInfo(&D, PDBInfo, PDBFileName);
+  // If we get here, there is no PDB info to return.
+  PDBInfo = nullptr;
+  PDBFileName = StringRef();
+  return Error::success();
+}
+
+// Find the import table.
+Error COFFObjectFile::initImportTablePtr() {
+  // First, we get the RVA of the import table. If the file lacks a pointer to
+  // the import table, do nothing.
+  const data_directory *DataEntry = getDataDirectory(COFF::IMPORT_TABLE);
+  if (!DataEntry)
+    return Error::success();
+
+  // Do nothing if the pointer to import table is NULL.
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress;
+
+  // Find the section that contains the RVA. This is needed because the RVA is
+  // the import table's memory address which is different from its file offset.
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(ImportTableRva, IntPtr, "import table"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+  ImportDirectory = reinterpret_cast<
+      const coff_import_directory_table_entry *>(IntPtr);
+  return Error::success();
+}
+
+// Initializes DelayImportDirectory and NumberOfDelayImportDirectory.
+Error COFFObjectFile::initDelayImportTablePtr() {
+  const data_directory *DataEntry =
+      getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR);
+  if (!DataEntry)
+    return Error::success();
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  uint32_t RVA = DataEntry->RelativeVirtualAddress;
+  NumberOfDelayImportDirectory = DataEntry->Size /
+      sizeof(delay_import_directory_table_entry) - 1;
+
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(RVA, IntPtr, "delay import table"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  DelayImportDirectory = reinterpret_cast<
+      const delay_import_directory_table_entry *>(IntPtr);
+  return Error::success();
+}
+
+// Find the export table.
+Error COFFObjectFile::initExportTablePtr() {
+  // First, we get the RVA of the export table. If the file lacks a pointer to
+  // the export table, do nothing.
+  const data_directory *DataEntry = getDataDirectory(COFF::EXPORT_TABLE);
+  if (!DataEntry)
+    return Error::success();
+
+  // Do nothing if the pointer to export table is NULL.
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress;
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(ExportTableRva, IntPtr, "export table"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  ExportDirectory =
+      reinterpret_cast<const export_directory_table_entry *>(IntPtr);
+  return Error::success();
+}
+
+Error COFFObjectFile::initBaseRelocPtr() {
+  const data_directory *DataEntry =
+      getDataDirectory(COFF::BASE_RELOCATION_TABLE);
+  if (!DataEntry)
+    return Error::success();
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr,
+                          "base reloc table"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>(
+      IntPtr);
+  BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>(
+      IntPtr + DataEntry->Size);
+  // FIXME: Verify the section containing BaseRelocHeader has at least
+  // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress.
+  return Error::success();
+}
+
+Error COFFObjectFile::initDebugDirectoryPtr() {
+  // Get the RVA of the debug directory. Do nothing if it does not exist.
+  const data_directory *DataEntry = getDataDirectory(COFF::DEBUG_DIRECTORY);
+  if (!DataEntry)
+    return Error::success();
+
+  // Do nothing if the RVA is NULL.
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  // Check that the size is a multiple of the entry size.
+  if (DataEntry->Size % sizeof(debug_directory) != 0)
+    return createStringError(object_error::parse_failed,
+                             "debug directory has uneven size");
+
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr,
+                          "debug directory"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  DebugDirectoryBegin = reinterpret_cast<const debug_directory *>(IntPtr);
+  DebugDirectoryEnd = reinterpret_cast<const debug_directory *>(
+      IntPtr + DataEntry->Size);
+  // FIXME: Verify the section containing DebugDirectoryBegin has at least
+  // DataEntry->Size bytes after DataEntry->RelativeVirtualAddress.
+  return Error::success();
+}
+
+Error COFFObjectFile::initTLSDirectoryPtr() {
+  // Get the RVA of the TLS directory. Do nothing if it does not exist.
+  const data_directory *DataEntry = getDataDirectory(COFF::TLS_TABLE);
+  if (!DataEntry)
+    return Error::success();
+
+  // Do nothing if the RVA is NULL.
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+
+  uint64_t DirSize =
+      is64() ? sizeof(coff_tls_directory64) : sizeof(coff_tls_directory32);
+
+  // Check that the size is correct.
+  if (DataEntry->Size != DirSize)
+    return createStringError(
+        object_error::parse_failed,
+        "TLS Directory size (%u) is not the expected size (%" PRIu64 ").",
+        static_cast<uint32_t>(DataEntry->Size), DirSize);
+
+  uintptr_t IntPtr = 0;
+  if (Error E =
+          getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr, "TLS directory"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  if (is64())
+    TLSDirectory64 = reinterpret_cast<const coff_tls_directory64 *>(IntPtr);
+  else
+    TLSDirectory32 = reinterpret_cast<const coff_tls_directory32 *>(IntPtr);
+
+  return Error::success();
+}
+
+Error COFFObjectFile::initLoadConfigPtr() {
+  // Get the RVA of the debug directory. Do nothing if it does not exist.
+  const data_directory *DataEntry = getDataDirectory(COFF::LOAD_CONFIG_TABLE);
+  if (!DataEntry)
+    return Error::success();
+
+  // Do nothing if the RVA is NULL.
+  if (DataEntry->RelativeVirtualAddress == 0)
+    return Error::success();
+  uintptr_t IntPtr = 0;
+  if (Error E = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr,
+                          "load config table"))
+    return E;
+  if (Error E = checkOffset(Data, IntPtr, DataEntry->Size))
+    return E;
+
+  LoadConfig = (const void *)IntPtr;
+  return Error::success();
+}
+
+Expected<std::unique_ptr<COFFObjectFile>>
+COFFObjectFile::create(MemoryBufferRef Object) {
+  std::unique_ptr<COFFObjectFile> Obj(new COFFObjectFile(std::move(Object)));
+  if (Error E = Obj->initialize())
+    return std::move(E);
+  return std::move(Obj);
+}
+
+COFFObjectFile::COFFObjectFile(MemoryBufferRef Object)
+    : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr),
+      COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr),
+      DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr),
+      SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0),
+      ImportDirectory(nullptr), DelayImportDirectory(nullptr),
+      NumberOfDelayImportDirectory(0), ExportDirectory(nullptr),
+      BaseRelocHeader(nullptr), BaseRelocEnd(nullptr),
+      DebugDirectoryBegin(nullptr), DebugDirectoryEnd(nullptr),
+      TLSDirectory32(nullptr), TLSDirectory64(nullptr) {}
+
+static Error ignoreStrippedErrors(Error E) {
+  if (E.isA<SectionStrippedError>()) {
+    consumeError(std::move(E));
+    return Error::success();
+  }
+  return E;
+}
+
+Error COFFObjectFile::initialize() {
+  // Check that we at least have enough room for a header.
+  std::error_code EC;
+  if (!checkSize(Data, EC, sizeof(coff_file_header)))
+    return errorCodeToError(EC);
+
+  // The current location in the file where we are looking at.
+  uint64_t CurPtr = 0;
+
+  // PE header is optional and is present only in executables. If it exists,
+  // it is placed right after COFF header.
+  bool HasPEHeader = false;
+
+  // Check if this is a PE/COFF file.
+  if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) {
+    // PE/COFF, seek through MS-DOS compatibility stub and 4-byte
+    // PE signature to find 'normal' COFF header.
+    const auto *DH = reinterpret_cast<const dos_header *>(base());
+    if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') {
+      CurPtr = DH->AddressOfNewExeHeader;
+      // Check the PE magic bytes. ("PE\0\0")
+      if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) {
+        return createStringError(object_error::parse_failed,
+                                 "incorrect PE magic");
+      }
+      CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes.
+      HasPEHeader = true;
+    }
+  }
+
+  if (Error E = getObject(COFFHeader, Data, base() + CurPtr))
+    return E;
+
+  // It might be a bigobj file, let's check.  Note that COFF bigobj and COFF
+  // import libraries share a common prefix but bigobj is more restrictive.
+  if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN &&
+      COFFHeader->NumberOfSections == uint16_t(0xffff) &&
+      checkSize(Data, EC, sizeof(coff_bigobj_file_header))) {
+    if (Error E = getObject(COFFBigObjHeader, Data, base() + CurPtr))
+      return E;
+
+    // Verify that we are dealing with bigobj.
+    if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion &&
+        std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic,
+                    sizeof(COFF::BigObjMagic)) == 0) {
+      COFFHeader = nullptr;
+      CurPtr += sizeof(coff_bigobj_file_header);
+    } else {
+      // It's not a bigobj.
+      COFFBigObjHeader = nullptr;
+    }
+  }
+  if (COFFHeader) {
+    // The prior checkSize call may have failed.  This isn't a hard error
+    // because we were just trying to sniff out bigobj.
+    EC = std::error_code();
+    CurPtr += sizeof(coff_file_header);
+
+    if (COFFHeader->isImportLibrary())
+      return errorCodeToError(EC);
+  }
+
+  if (HasPEHeader) {
+    const pe32_header *Header;
+    if (Error E = getObject(Header, Data, base() + CurPtr))
+      return E;
+
+    const uint8_t *DataDirAddr;
+    uint64_t DataDirSize;
+    if (Header->Magic == COFF::PE32Header::PE32) {
+      PE32Header = Header;
+      DataDirAddr = base() + CurPtr + sizeof(pe32_header);
+      DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize;
+    } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) {
+      PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header);
+      DataDirAddr = base() + CurPtr + sizeof(pe32plus_header);
+      DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize;
+    } else {
+      // It's neither PE32 nor PE32+.
+      return createStringError(object_error::parse_failed,
+                               "incorrect PE magic");
+    }
+    if (Error E = getObject(DataDirectory, Data, DataDirAddr, DataDirSize))
+      return E;
+  }
+
+  if (COFFHeader)
+    CurPtr += COFFHeader->SizeOfOptionalHeader;
+
+  assert(COFFHeader || COFFBigObjHeader);
+
+  if (Error E =
+          getObject(SectionTable, Data, base() + CurPtr,
+                    (uint64_t)getNumberOfSections() * sizeof(coff_section)))
+    return E;
+
+  // Initialize the pointer to the symbol table.
+  if (getPointerToSymbolTable() != 0) {
+    if (Error E = initSymbolTablePtr()) {
+      // Recover from errors reading the symbol table.
+      consumeError(std::move(E));
+      SymbolTable16 = nullptr;
+      SymbolTable32 = nullptr;
+      StringTable = nullptr;
+      StringTableSize = 0;
+    }
+  } else {
+    // We had better not have any symbols if we don't have a symbol table.
+    if (getNumberOfSymbols() != 0) {
+      return createStringError(object_error::parse_failed,
+                               "symbol table missing");
+    }
+  }
+
+  // Initialize the pointer to the beginning of the import table.
+  if (Error E = ignoreStrippedErrors(initImportTablePtr()))
+    return E;
+  if (Error E = ignoreStrippedErrors(initDelayImportTablePtr()))
+    return E;
+
+  // Initialize the pointer to the export table.
+  if (Error E = ignoreStrippedErrors(initExportTablePtr()))
+    return E;
+
+  // Initialize the pointer to the base relocation table.
+  if (Error E = ignoreStrippedErrors(initBaseRelocPtr()))
+    return E;
+
+  // Initialize the pointer to the debug directory.
+  if (Error E = ignoreStrippedErrors(initDebugDirectoryPtr()))
+    return E;
+
+  // Initialize the pointer to the TLS directory.
+  if (Error E = ignoreStrippedErrors(initTLSDirectoryPtr()))
+    return E;
+
+  if (Error E = ignoreStrippedErrors(initLoadConfigPtr()))
+    return E;
+
+  return Error::success();
+}
+
+basic_symbol_iterator COFFObjectFile::symbol_begin() const {
+  DataRefImpl Ret;
+  Ret.p = getSymbolTable();
+  return basic_symbol_iterator(SymbolRef(Ret, this));
+}
+
+basic_symbol_iterator COFFObjectFile::symbol_end() const {
+  // The symbol table ends where the string table begins.
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(StringTable);
+  return basic_symbol_iterator(SymbolRef(Ret, this));
+}
+
+import_directory_iterator COFFObjectFile::import_directory_begin() const {
+  if (!ImportDirectory)
+    return import_directory_end();
+  if (ImportDirectory->isNull())
+    return import_directory_end();
+  return import_directory_iterator(
+      ImportDirectoryEntryRef(ImportDirectory, 0, this));
+}
+
+import_directory_iterator COFFObjectFile::import_directory_end() const {
+  return import_directory_iterator(
+      ImportDirectoryEntryRef(nullptr, -1, this));
+}
+
+delay_import_directory_iterator
+COFFObjectFile::delay_import_directory_begin() const {
+  return delay_import_directory_iterator(
+      DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this));
+}
+
+delay_import_directory_iterator
+COFFObjectFile::delay_import_directory_end() const {
+  return delay_import_directory_iterator(
+      DelayImportDirectoryEntryRef(
+          DelayImportDirectory, NumberOfDelayImportDirectory, this));
+}
+
+export_directory_iterator COFFObjectFile::export_directory_begin() const {
+  return export_directory_iterator(
+      ExportDirectoryEntryRef(ExportDirectory, 0, this));
+}
+
+export_directory_iterator COFFObjectFile::export_directory_end() const {
+  if (!ExportDirectory)
+    return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this));
+  ExportDirectoryEntryRef Ref(ExportDirectory,
+                              ExportDirectory->AddressTableEntries, this);
+  return export_directory_iterator(Ref);
+}
+
+section_iterator COFFObjectFile::section_begin() const {
+  DataRefImpl Ret;
+  Ret.p = reinterpret_cast<uintptr_t>(SectionTable);
+  return section_iterator(SectionRef(Ret, this));
+}
+
+section_iterator COFFObjectFile::section_end() const {
+  DataRefImpl Ret;
+  int NumSections =
+      COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections();
+  Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections);
+  return section_iterator(SectionRef(Ret, this));
+}
+
+base_reloc_iterator COFFObjectFile::base_reloc_begin() const {
+  return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this));
+}
+
+base_reloc_iterator COFFObjectFile::base_reloc_end() const {
+  return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this));
+}
+
+uint8_t COFFObjectFile::getBytesInAddress() const {
+  return getArch() == Triple::x86_64 || getArch() == Triple::aarch64 ? 8 : 4;
+}
+
+StringRef COFFObjectFile::getFileFormatName() const {
+  switch(getMachine()) {
+  case COFF::IMAGE_FILE_MACHINE_I386:
+    return "COFF-i386";
+  case COFF::IMAGE_FILE_MACHINE_AMD64:
+    return "COFF-x86-64";
+  case COFF::IMAGE_FILE_MACHINE_ARMNT:
+    return "COFF-ARM";
+  case COFF::IMAGE_FILE_MACHINE_ARM64:
+    return "COFF-ARM64";
+  case COFF::IMAGE_FILE_MACHINE_ARM64EC:
+    return "COFF-ARM64EC";
+  default:
+    return "COFF-<unknown arch>";
+  }
+}
+
+Triple::ArchType COFFObjectFile::getArch() const {
+  switch (getMachine()) {
+  case COFF::IMAGE_FILE_MACHINE_I386:
+    return Triple::x86;
+  case COFF::IMAGE_FILE_MACHINE_AMD64:
+    return Triple::x86_64;
+  case COFF::IMAGE_FILE_MACHINE_ARMNT:
+    return Triple::thumb;
+  case COFF::IMAGE_FILE_MACHINE_ARM64:
+  case COFF::IMAGE_FILE_MACHINE_ARM64EC:
+    return Triple::aarch64;
+  default:
+    return Triple::UnknownArch;
+  }
+}
+
+Expected<uint64_t> COFFObjectFile::getStartAddress() const {
+  if (PE32Header)
+    return PE32Header->AddressOfEntryPoint;
+  return 0;
+}
+
+iterator_range<import_directory_iterator>
+COFFObjectFile::import_directories() const {
+  return make_range(import_directory_begin(), import_directory_end());
+}
+
+iterator_range<delay_import_directory_iterator>
+COFFObjectFile::delay_import_directories() const {
+  return make_range(delay_import_directory_begin(),
+                    delay_import_directory_end());
+}
+
+iterator_range<export_directory_iterator>
+COFFObjectFile::export_directories() const {
+  return make_range(export_directory_begin(), export_directory_end());
+}
+
+iterator_range<base_reloc_iterator> COFFObjectFile::base_relocs() const {
+  return make_range(base_reloc_begin(), base_reloc_end());
+}
+
+const data_directory *COFFObjectFile::getDataDirectory(uint32_t Index) const {
+  if (!DataDirectory)
+    return nullptr;
+  assert(PE32Header || PE32PlusHeader);
+  uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize
+                               : PE32PlusHeader->NumberOfRvaAndSize;
+  if (Index >= NumEnt)
+    return nullptr;
+  return &DataDirectory[Index];
+}
+
+Expected<const coff_section *> COFFObjectFile::getSection(int32_t Index) const {
+  // Perhaps getting the section of a reserved section index should be an error,
+  // but callers rely on this to return null.
+  if (COFF::isReservedSectionNumber(Index))
+    return (const coff_section *)nullptr;
+  if (static_cast<uint32_t>(Index) <= getNumberOfSections()) {
+    // We already verified the section table data, so no need to check again.
+    return SectionTable + (Index - 1);
+  }
+  return createStringError(object_error::parse_failed,
+                           "section index out of bounds");
+}
+
+Expected<StringRef> COFFObjectFile::getString(uint32_t Offset) const {
+  if (StringTableSize <= 4)
+    // Tried to get a string from an empty string table.
+    return createStringError(object_error::parse_failed, "string table empty");
+  if (Offset >= StringTableSize)
+    return errorCodeToError(object_error::unexpected_eof);
+  return StringRef(StringTable + Offset);
+}
+
+Expected<StringRef> COFFObjectFile::getSymbolName(COFFSymbolRef Symbol) const {
+  return getSymbolName(Symbol.getGeneric());
+}
+
+Expected<StringRef>
+COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol) const {
+  // Check for string table entry. First 4 bytes are 0.
+  if (Symbol->Name.Offset.Zeroes == 0)
+    return getString(Symbol->Name.Offset.Offset);
+
+  // Null terminated, let ::strlen figure out the length.
+  if (Symbol->Name.ShortName[COFF::NameSize - 1] == 0)
+    return StringRef(Symbol->Name.ShortName);
+
+  // Not null terminated, use all 8 bytes.
+  return StringRef(Symbol->Name.ShortName, COFF::NameSize);
+}
+
+ArrayRef<uint8_t>
+COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const {
+  const uint8_t *Aux = nullptr;
+
+  size_t SymbolSize = getSymbolTableEntrySize();
+  if (Symbol.getNumberOfAuxSymbols() > 0) {
+    // AUX data comes immediately after the symbol in COFF
+    Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize;
+#ifndef NDEBUG
+    // Verify that the Aux symbol points to a valid entry in the symbol table.
+    uintptr_t Offset = uintptr_t(Aux) - uintptr_t(base());
+    if (Offset < getPointerToSymbolTable() ||
+        Offset >=
+            getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize))
+      report_fatal_error("Aux Symbol data was outside of symbol table.");
+
+    assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 &&
+           "Aux Symbol data did not point to the beginning of a symbol");
+#endif
+  }
+  return ArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize);
+}
+
+uint32_t COFFObjectFile::getSymbolIndex(COFFSymbolRef Symbol) const {
+  uintptr_t Offset =
+      reinterpret_cast<uintptr_t>(Symbol.getRawPtr()) - getSymbolTable();
+  assert(Offset % getSymbolTableEntrySize() == 0 &&
+         "Symbol did not point to the beginning of a symbol");
+  size_t Index = Offset / getSymbolTableEntrySize();
+  assert(Index < getNumberOfSymbols());
+  return Index;
+}
+
+Expected<StringRef>
+COFFObjectFile::getSectionName(const coff_section *Sec) const {
+  StringRef Name = StringRef(Sec->Name, COFF::NameSize).split('\0').first;
+
+  // Check for string table entry. First byte is '/'.
+  if (Name.startswith("/")) {
+    uint32_t Offset;
+    if (Name.startswith("//")) {
+      if (decodeBase64StringEntry(Name.substr(2), Offset))
+        return createStringError(object_error::parse_failed,
+                                 "invalid section name");
+    } else {
+      if (Name.substr(1).getAsInteger(10, Offset))
+        return createStringError(object_error::parse_failed,
+                                 "invalid section name");
+    }
+    return getString(Offset);
+  }
+
+  return Name;
+}
+
+uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const {
+  // SizeOfRawData and VirtualSize change what they represent depending on
+  // whether or not we have an executable image.
+  //
+  // For object files, SizeOfRawData contains the size of section's data;
+  // VirtualSize should be zero but isn't due to buggy COFF writers.
+  //
+  // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the
+  // actual section size is in VirtualSize.  It is possible for VirtualSize to
+  // be greater than SizeOfRawData; the contents past that point should be
+  // considered to be zero.
+  if (getDOSHeader())
+    return std::min(Sec->VirtualSize, Sec->SizeOfRawData);
+  return Sec->SizeOfRawData;
+}
+
+Error COFFObjectFile::getSectionContents(const coff_section *Sec,
+                                         ArrayRef<uint8_t> &Res) const {
+  // In COFF, a virtual section won't have any in-file
+  // content, so the file pointer to the content will be zero.
+  if (Sec->PointerToRawData == 0)
+    return Error::success();
+  // The only thing that we need to verify is that the contents is contained
+  // within the file bounds. We don't need to make sure it doesn't cover other
+  // data, as there's nothing that says that is not allowed.
+  uintptr_t ConStart =
+      reinterpret_cast<uintptr_t>(base()) + Sec->PointerToRawData;
+  uint32_t SectionSize = getSectionSize(Sec);
+  if (Error E = checkOffset(Data, ConStart, SectionSize))
+    return E;
+  Res = ArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize);
+  return Error::success();
+}
+
+const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
+  return reinterpret_cast<const coff_relocation*>(Rel.p);
+}
+
+void COFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
+  Rel.p = reinterpret_cast<uintptr_t>(
+            reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
+}
+
+uint64_t COFFObjectFile::getRelocationOffset(DataRefImpl Rel) const {
+  const coff_relocation *R = toRel(Rel);
+  return R->VirtualAddress;
+}
+
+symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
+  const coff_relocation *R = toRel(Rel);
+  DataRefImpl Ref;
+  if (R->SymbolTableIndex >= getNumberOfSymbols())
+    return symbol_end();
+  if (SymbolTable16)
+    Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex);
+  else if (SymbolTable32)
+    Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex);
+  else
+    llvm_unreachable("no symbol table pointer!");
+  return symbol_iterator(SymbolRef(Ref, this));
+}
+
+uint64_t COFFObjectFile::getRelocationType(DataRefImpl Rel) const {
+  const coff_relocation* R = toRel(Rel);
+  return R->Type;
+}
+
+const coff_section *
+COFFObjectFile::getCOFFSection(const SectionRef &Section) const {
+  return toSec(Section.getRawDataRefImpl());
+}
+
+COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const {
+  if (SymbolTable16)
+    return toSymb<coff_symbol16>(Ref);
+  if (SymbolTable32)
+    return toSymb<coff_symbol32>(Ref);
+  llvm_unreachable("no symbol table pointer!");
+}
+
+COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const {
+  return getCOFFSymbol(Symbol.getRawDataRefImpl());
+}
+
+const coff_relocation *
+COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const {
+  return toRel(Reloc.getRawDataRefImpl());
+}
+
+ArrayRef<coff_relocation>
+COFFObjectFile::getRelocations(const coff_section *Sec) const {
+  return {getFirstReloc(Sec, Data, base()),
+          getNumberOfRelocations(Sec, Data, base())};
+}
+
+#define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type)                           \
+  case COFF::reloc_type:                                                       \
+    return #reloc_type;
+
+StringRef COFFObjectFile::getRelocationTypeName(uint16_t Type) const {
+  switch (getMachine()) {
+  case COFF::IMAGE_FILE_MACHINE_AMD64:
+    switch (Type) {
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
+    default:
+      return "Unknown";
+    }
+    break;
+  case COFF::IMAGE_FILE_MACHINE_ARMNT:
+    switch (Type) {
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_REL32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_PAIR);
+    default:
+      return "Unknown";
+    }
+    break;
+  case COFF::IMAGE_FILE_MACHINE_ARM64:
+  case COFF::IMAGE_FILE_MACHINE_ARM64EC:
+    switch (Type) {
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ABSOLUTE);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR32NB);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH26);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEBASE_REL21);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL21);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12A);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_PAGEOFFSET_12L);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12A);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_HIGH12A);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECREL_LOW12L);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_TOKEN);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_SECTION);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_ADDR64);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH19);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_BRANCH14);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM64_REL32);
+    default:
+      return "Unknown";
+    }
+    break;
+  case COFF::IMAGE_FILE_MACHINE_I386:
+    switch (Type) {
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
+    LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
+    default:
+      return "Unknown";
+    }
+    break;
+  default:
+    return "Unknown";
+  }
+}
+
+#undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
+
+void COFFObjectFile::getRelocationTypeName(
+    DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
+  const coff_relocation *Reloc = toRel(Rel);
+  StringRef Res = getRelocationTypeName(Reloc->Type);
+  Result.append(Res.begin(), Res.end());
+}
+
+bool COFFObjectFile::isRelocatableObject() const {
+  return !DataDirectory;
+}
+
+StringRef COFFObjectFile::mapDebugSectionName(StringRef Name) const {
+  return StringSwitch<StringRef>(Name)
+      .Case("eh_fram", "eh_frame")
+      .Default(Name);
+}
+
+bool ImportDirectoryEntryRef::
+operator==(const ImportDirectoryEntryRef &Other) const {
+  return ImportTable == Other.ImportTable && Index == Other.Index;
+}
+
+void ImportDirectoryEntryRef::moveNext() {
+  ++Index;
+  if (ImportTable[Index].isNull()) {
+    Index = -1;
+    ImportTable = nullptr;
+  }
+}
+
+Error ImportDirectoryEntryRef::getImportTableEntry(
+    const coff_import_directory_table_entry *&Result) const {
+  return getObject(Result, OwningObject->Data, ImportTable + Index);
+}
+
+static imported_symbol_iterator
+makeImportedSymbolIterator(const COFFObjectFile *Object,
+                           uintptr_t Ptr, int Index) {
+  if (Object->getBytesInAddress() == 4) {
+    auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr);
+    return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
+  }
+  auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr);
+  return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
+}
+
+static imported_symbol_iterator
+importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) {
+  uintptr_t IntPtr = 0;
+  // FIXME: Handle errors.
+  cantFail(Object->getRvaPtr(RVA, IntPtr));
+  return makeImportedSymbolIterator(Object, IntPtr, 0);
+}
+
+static imported_symbol_iterator
+importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) {
+  uintptr_t IntPtr = 0;
+  // FIXME: Handle errors.
+  cantFail(Object->getRvaPtr(RVA, IntPtr));
+  // Forward the pointer to the last entry which is null.
+  int Index = 0;
+  if (Object->getBytesInAddress() == 4) {
+    auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr);
+    while (*Entry++)
+      ++Index;
+  } else {
+    auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr);
+    while (*Entry++)
+      ++Index;
+  }
+  return makeImportedSymbolIterator(Object, IntPtr, Index);
+}
+
+imported_symbol_iterator
+ImportDirectoryEntryRef::imported_symbol_begin() const {
+  return importedSymbolBegin(ImportTable[Index].ImportAddressTableRVA,
+                             OwningObject);
+}
+
+imported_symbol_iterator
+ImportDirectoryEntryRef::imported_symbol_end() const {
+  return importedSymbolEnd(ImportTable[Index].ImportAddressTableRVA,
+                           OwningObject);
+}
+
+iterator_range<imported_symbol_iterator>
+ImportDirectoryEntryRef::imported_symbols() const {
+  return make_range(imported_symbol_begin(), imported_symbol_end());
+}
+
+imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_begin() const {
+  return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA,
+                             OwningObject);
+}
+
+imported_symbol_iterator ImportDirectoryEntryRef::lookup_table_end() const {
+  return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA,
+                           OwningObject);
+}
+
+iterator_range<imported_symbol_iterator>
+ImportDirectoryEntryRef::lookup_table_symbols() const {
+  return make_range(lookup_table_begin(), lookup_table_end());
+}
+
+Error ImportDirectoryEntryRef::getName(StringRef &Result) const {
+  uintptr_t IntPtr = 0;
+  if (Error E = OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr,
+                                        "import directory name"))
+    return E;
+  Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+  return Error::success();
+}
+
+Error
+ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t  &Result) const {
+  Result = ImportTable[Index].ImportLookupTableRVA;
+  return Error::success();
+}
+
+Error ImportDirectoryEntryRef::getImportAddressTableRVA(
+    uint32_t &Result) const {
+  Result = ImportTable[Index].ImportAddressTableRVA;
+  return Error::success();
+}
+
+bool DelayImportDirectoryEntryRef::
+operator==(const DelayImportDirectoryEntryRef &Other) const {
+  return Table == Other.Table && Index == Other.Index;
+}
+
+void DelayImportDirectoryEntryRef::moveNext() {
+  ++Index;
+}
+
+imported_symbol_iterator
+DelayImportDirectoryEntryRef::imported_symbol_begin() const {
+  return importedSymbolBegin(Table[Index].DelayImportNameTable,
+                             OwningObject);
+}
+
+imported_symbol_iterator
+DelayImportDirectoryEntryRef::imported_symbol_end() const {
+  return importedSymbolEnd(Table[Index].DelayImportNameTable,
+                           OwningObject);
+}
+
+iterator_range<imported_symbol_iterator>
+DelayImportDirectoryEntryRef::imported_symbols() const {
+  return make_range(imported_symbol_begin(), imported_symbol_end());
+}
+
+Error DelayImportDirectoryEntryRef::getName(StringRef &Result) const {
+  uintptr_t IntPtr = 0;
+  if (Error E = OwningObject->getRvaPtr(Table[Index].Name, IntPtr,
+                                        "delay import directory name"))
+    return E;
+  Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+  return Error::success();
+}
+
+Error DelayImportDirectoryEntryRef::getDelayImportTable(
+    const delay_import_directory_table_entry *&Result) const {
+  Result = &Table[Index];
+  return Error::success();
+}
+
+Error DelayImportDirectoryEntryRef::getImportAddress(int AddrIndex,
+                                                     uint64_t &Result) const {
+  uint32_t RVA = Table[Index].DelayImportAddressTable +
+      AddrIndex * (OwningObject->is64() ? 8 : 4);
+  uintptr_t IntPtr = 0;
+  if (Error E = OwningObject->getRvaPtr(RVA, IntPtr, "import address"))
+    return E;
+  if (OwningObject->is64())
+    Result = *reinterpret_cast<const ulittle64_t *>(IntPtr);
+  else
+    Result = *reinterpret_cast<const ulittle32_t *>(IntPtr);
+  return Error::success();
+}
+
+bool ExportDirectoryEntryRef::
+operator==(const ExportDirectoryEntryRef &Other) const {
+  return ExportTable == Other.ExportTable && Index == Other.Index;
+}
+
+void ExportDirectoryEntryRef::moveNext() {
+  ++Index;
+}
+
+// Returns the name of the current export symbol. If the symbol is exported only
+// by ordinal, the empty string is set as a result.
+Error ExportDirectoryEntryRef::getDllName(StringRef &Result) const {
+  uintptr_t IntPtr = 0;
+  if (Error E =
+          OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr, "dll name"))
+    return E;
+  Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+  return Error::success();
+}
+
+// Returns the starting ordinal number.
+Error ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const {
+  Result = ExportTable->OrdinalBase;
+  return Error::success();
+}
+
+// Returns the export ordinal of the current export symbol.
+Error ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const {
+  Result = ExportTable->OrdinalBase + Index;
+  return Error::success();
+}
+
+// Returns the address of the current export symbol.
+Error ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const {
+  uintptr_t IntPtr = 0;
+  if (Error EC = OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA,
+                                         IntPtr, "export address"))
+    return EC;
+  const export_address_table_entry *entry =
+      reinterpret_cast<const export_address_table_entry *>(IntPtr);
+  Result = entry[Index].ExportRVA;
+  return Error::success();
+}
+
+// Returns the name of the current export symbol. If the symbol is exported only
+// by ordinal, the empty string is set as a result.
+Error
+ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
+  uintptr_t IntPtr = 0;
+  if (Error EC = OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr,
+                                         "export ordinal table"))
+    return EC;
+  const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr);
+
+  uint32_t NumEntries = ExportTable->NumberOfNamePointers;
+  int Offset = 0;
+  for (const ulittle16_t *I = Start, *E = Start + NumEntries;
+       I < E; ++I, ++Offset) {
+    if (*I != Index)
+      continue;
+    if (Error EC = OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr,
+                                           "export table entry"))
+      return EC;
+    const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr);
+    if (Error EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr,
+                                           "export symbol name"))
+      return EC;
+    Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+    return Error::success();
+  }
+  Result = "";
+  return Error::success();
+}
+
+Error ExportDirectoryEntryRef::isForwarder(bool &Result) const {
+  const data_directory *DataEntry =
+      OwningObject->getDataDirectory(COFF::EXPORT_TABLE);
+  if (!DataEntry)
+    return createStringError(object_error::parse_failed,
+                             "export table missing");
+  uint32_t RVA;
+  if (auto EC = getExportRVA(RVA))
+    return EC;
+  uint32_t Begin = DataEntry->RelativeVirtualAddress;
+  uint32_t End = DataEntry->RelativeVirtualAddress + DataEntry->Size;
+  Result = (Begin <= RVA && RVA < End);
+  return Error::success();
+}
+
+Error ExportDirectoryEntryRef::getForwardTo(StringRef &Result) const {
+  uint32_t RVA;
+  if (auto EC = getExportRVA(RVA))
+    return EC;
+  uintptr_t IntPtr = 0;
+  if (auto EC = OwningObject->getRvaPtr(RVA, IntPtr, "export forward target"))
+    return EC;
+  Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+  return Error::success();
+}
+
+bool ImportedSymbolRef::
+operator==(const ImportedSymbolRef &Other) const {
+  return Entry32 == Other.Entry32 && Entry64 == Other.Entry64
+      && Index == Other.Index;
+}
+
+void ImportedSymbolRef::moveNext() {
+  ++Index;
+}
+
+Error ImportedSymbolRef::getSymbolName(StringRef &Result) const {
+  uint32_t RVA;
+  if (Entry32) {
+    // If a symbol is imported only by ordinal, it has no name.
+    if (Entry32[Index].isOrdinal())
+      return Error::success();
+    RVA = Entry32[Index].getHintNameRVA();
+  } else {
+    if (Entry64[Index].isOrdinal())
+      return Error::success();
+    RVA = Entry64[Index].getHintNameRVA();
+  }
+  uintptr_t IntPtr = 0;
+  if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr, "import symbol name"))
+    return EC;
+  // +2 because the first two bytes is hint.
+  Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2));
+  return Error::success();
+}
+
+Error ImportedSymbolRef::isOrdinal(bool &Result) const {
+  if (Entry32)
+    Result = Entry32[Index].isOrdinal();
+  else
+    Result = Entry64[Index].isOrdinal();
+  return Error::success();
+}
+
+Error ImportedSymbolRef::getHintNameRVA(uint32_t &Result) const {
+  if (Entry32)
+    Result = Entry32[Index].getHintNameRVA();
+  else
+    Result = Entry64[Index].getHintNameRVA();
+  return Error::success();
+}
+
+Error ImportedSymbolRef::getOrdinal(uint16_t &Result) const {
+  uint32_t RVA;
+  if (Entry32) {
+    if (Entry32[Index].isOrdinal()) {
+      Result = Entry32[Index].getOrdinal();
+      return Error::success();
+    }
+    RVA = Entry32[Index].getHintNameRVA();
+  } else {
+    if (Entry64[Index].isOrdinal()) {
+      Result = Entry64[Index].getOrdinal();
+      return Error::success();
+    }
+    RVA = Entry64[Index].getHintNameRVA();
+  }
+  uintptr_t IntPtr = 0;
+  if (Error EC = OwningObject->getRvaPtr(RVA, IntPtr, "import symbol ordinal"))
+    return EC;
+  Result = *reinterpret_cast<const ulittle16_t *>(IntPtr);
+  return Error::success();
+}
+
+Expected<std::unique_ptr<COFFObjectFile>>
+ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) {
+  return COFFObjectFile::create(Object);
+}
+
+bool BaseRelocRef::operator==(const BaseRelocRef &Other) const {
+  return Header == Other.Header && Index == Other.Index;
+}
+
+void BaseRelocRef::moveNext() {
+  // Header->BlockSize is the size of the current block, including the
+  // size of the header itself.
+  uint32_t Size = sizeof(*Header) +
+      sizeof(coff_base_reloc_block_entry) * (Index + 1);
+  if (Size == Header->BlockSize) {
+    // .reloc contains a list of base relocation blocks. Each block
+    // consists of the header followed by entries. The header contains
+    // how many entories will follow. When we reach the end of the
+    // current block, proceed to the next block.
+    Header = reinterpret_cast<const coff_base_reloc_block_header *>(
+        reinterpret_cast<const uint8_t *>(Header) + Size);
+    Index = 0;
+  } else {
+    ++Index;
+  }
+}
+
+Error BaseRelocRef::getType(uint8_t &Type) const {
+  auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
+  Type = Entry[Index].getType();
+  return Error::success();
+}
+
+Error BaseRelocRef::getRVA(uint32_t &Result) const {
+  auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
+  Result = Header->PageRVA + Entry[Index].getOffset();
+  return Error::success();
+}
+
+#define RETURN_IF_ERROR(Expr)                                                  \
+  do {                                                                         \
+    Error E = (Expr);                                                          \
+    if (E)                                                                     \
+      return std::move(E);                                                     \
+  } while (0)
+
+Expected<ArrayRef<UTF16>>
+ResourceSectionRef::getDirStringAtOffset(uint32_t Offset) {
+  BinaryStreamReader Reader = BinaryStreamReader(BBS);
+  Reader.setOffset(Offset);
+  uint16_t Length;
+  RETURN_IF_ERROR(Reader.readInteger(Length));
+  ArrayRef<UTF16> RawDirString;
+  RETURN_IF_ERROR(Reader.readArray(RawDirString, Length));
+  return RawDirString;
+}
+
+Expected<ArrayRef<UTF16>>
+ResourceSectionRef::getEntryNameString(const coff_resource_dir_entry &Entry) {
+  return getDirStringAtOffset(Entry.Identifier.getNameOffset());
+}
+
+Expected<const coff_resource_dir_table &>
+ResourceSectionRef::getTableAtOffset(uint32_t Offset) {
+  const coff_resource_dir_table *Table = nullptr;
+
+  BinaryStreamReader Reader(BBS);
+  Reader.setOffset(Offset);
+  RETURN_IF_ERROR(Reader.readObject(Table));
+  assert(Table != nullptr);
+  return *Table;
+}
+
+Expected<const coff_resource_dir_entry &>
+ResourceSectionRef::getTableEntryAtOffset(uint32_t Offset) {
+  const coff_resource_dir_entry *Entry = nullptr;
+
+  BinaryStreamReader Reader(BBS);
+  Reader.setOffset(Offset);
+  RETURN_IF_ERROR(Reader.readObject(Entry));
+  assert(Entry != nullptr);
+  return *Entry;
+}
+
+Expected<const coff_resource_data_entry &>
+ResourceSectionRef::getDataEntryAtOffset(uint32_t Offset) {
+  const coff_resource_data_entry *Entry = nullptr;
+
+  BinaryStreamReader Reader(BBS);
+  Reader.setOffset(Offset);
+  RETURN_IF_ERROR(Reader.readObject(Entry));
+  assert(Entry != nullptr);
+  return *Entry;
+}
+
+Expected<const coff_resource_dir_table &>
+ResourceSectionRef::getEntrySubDir(const coff_resource_dir_entry &Entry) {
+  assert(Entry.Offset.isSubDir());
+  return getTableAtOffset(Entry.Offset.value());
+}
+
+Expected<const coff_resource_data_entry &>
+ResourceSectionRef::getEntryData(const coff_resource_dir_entry &Entry) {
+  assert(!Entry.Offset.isSubDir());
+  return getDataEntryAtOffset(Entry.Offset.value());
+}
+
+Expected<const coff_resource_dir_table &> ResourceSectionRef::getBaseTable() {
+  return getTableAtOffset(0);
+}
+
+Expected<const coff_resource_dir_entry &>
+ResourceSectionRef::getTableEntry(const coff_resource_dir_table &Table,
+                                  uint32_t Index) {
+  if (Index >= (uint32_t)(Table.NumberOfNameEntries + Table.NumberOfIDEntries))
+    return createStringError(object_error::parse_failed, "index out of range");
+  const uint8_t *TablePtr = reinterpret_cast<const uint8_t *>(&Table);
+  ptrdiff_t TableOffset = TablePtr - BBS.data().data();
+  return getTableEntryAtOffset(TableOffset + sizeof(Table) +
+                               Index * sizeof(coff_resource_dir_entry));
+}
+
+Error ResourceSectionRef::load(const COFFObjectFile *O) {
+  for (const SectionRef &S : O->sections()) {
+    Expected<StringRef> Name = S.getName();
+    if (!Name)
+      return Name.takeError();
+
+    if (*Name == ".rsrc" || *Name == ".rsrc$01")
+      return load(O, S);
+  }
+  return createStringError(object_error::parse_failed,
+                           "no resource section found");
+}
+
+Error ResourceSectionRef::load(const COFFObjectFile *O, const SectionRef &S) {
+  Obj = O;
+  Section = S;
+  Expected<StringRef> Contents = Section.getContents();
+  if (!Contents)
+    return Contents.takeError();
+  BBS = BinaryByteStream(*Contents, support::little);
+  const coff_section *COFFSect = Obj->getCOFFSection(Section);
+  ArrayRef<coff_relocation> OrigRelocs = Obj->getRelocations(COFFSect);
+  Relocs.reserve(OrigRelocs.size());
+  for (const coff_relocation &R : OrigRelocs)
+    Relocs.push_back(&R);
+  llvm::sort(Relocs, [](const coff_relocation *A, const coff_relocation *B) {
+    return A->VirtualAddress < B->VirtualAddress;
+  });
+  return Error::success();
+}
+
+Expected<StringRef>
+ResourceSectionRef::getContents(const coff_resource_data_entry &Entry) {
+  if (!Obj)
+    return createStringError(object_error::parse_failed, "no object provided");
+
+  // Find a potential relocation at the DataRVA field (first member of
+  // the coff_resource_data_entry struct).
+  const uint8_t *EntryPtr = reinterpret_cast<const uint8_t *>(&Entry);
+  ptrdiff_t EntryOffset = EntryPtr - BBS.data().data();
+  coff_relocation RelocTarget{ulittle32_t(EntryOffset), ulittle32_t(0),
+                              ulittle16_t(0)};
+  auto RelocsForOffset =
+      std::equal_range(Relocs.begin(), Relocs.end(), &RelocTarget,
+                       [](const coff_relocation *A, const coff_relocation *B) {
+                         return A->VirtualAddress < B->VirtualAddress;
+                       });
+
+  if (RelocsForOffset.first != RelocsForOffset.second) {
+    // We found a relocation with the right offset. Check that it does have
+    // the expected type.
+    const coff_relocation &R = **RelocsForOffset.first;
+    uint16_t RVAReloc;
+    switch (Obj->getMachine()) {
+    case COFF::IMAGE_FILE_MACHINE_I386:
+      RVAReloc = COFF::IMAGE_REL_I386_DIR32NB;
+      break;
+    case COFF::IMAGE_FILE_MACHINE_AMD64:
+      RVAReloc = COFF::IMAGE_REL_AMD64_ADDR32NB;
+      break;
+    case COFF::IMAGE_FILE_MACHINE_ARMNT:
+      RVAReloc = COFF::IMAGE_REL_ARM_ADDR32NB;
+      break;
+    case COFF::IMAGE_FILE_MACHINE_ARM64:
+    case COFF::IMAGE_FILE_MACHINE_ARM64EC:
+      RVAReloc = COFF::IMAGE_REL_ARM64_ADDR32NB;
+      break;
+    default:
+      return createStringError(object_error::parse_failed,
+                               "unsupported architecture");
+    }
+    if (R.Type != RVAReloc)
+      return createStringError(object_error::parse_failed,
+                               "unexpected relocation type");
+    // Get the relocation's symbol
+    Expected<COFFSymbolRef> Sym = Obj->getSymbol(R.SymbolTableIndex);
+    if (!Sym)
+      return Sym.takeError();
+    // And the symbol's section
+    Expected<const coff_section *> Section =
+        Obj->getSection(Sym->getSectionNumber());
+    if (!Section)
+      return Section.takeError();
+    // Add the initial value of DataRVA to the symbol's offset to find the
+    // data it points at.
+    uint64_t Offset = Entry.DataRVA + Sym->getValue();
+    ArrayRef<uint8_t> Contents;
+    if (Error E = Obj->getSectionContents(*Section, Contents))
+      return std::move(E);
+    if (Offset + Entry.DataSize > Contents.size())
+      return createStringError(object_error::parse_failed,
+                               "data outside of section");
+    // Return a reference to the data inside the section.
+    return StringRef(reinterpret_cast<const char *>(Contents.data()) + Offset,
+                     Entry.DataSize);
+  } else {
+    // Relocatable objects need a relocation for the DataRVA field.
+    if (Obj->isRelocatableObject())
+      return createStringError(object_error::parse_failed,
+                               "no relocation found for DataRVA");
+
+    // Locate the section that contains the address that DataRVA points at.
+    uint64_t VA = Entry.DataRVA + Obj->getImageBase();
+    for (const SectionRef &S : Obj->sections()) {
+      if (VA >= S.getAddress() &&
+          VA + Entry.DataSize <= S.getAddress() + S.getSize()) {
+        uint64_t Offset = VA - S.getAddress();
+        Expected<StringRef> Contents = S.getContents();
+        if (!Contents)
+          return Contents.takeError();
+        return Contents->slice(Offset, Offset + Entry.DataSize);
+      }
+    }
+    return createStringError(object_error::parse_failed,
+                             "address not found in image");
+  }
+}