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Update aosp/master LLVM for rebase to r239765
[android-x86/external-llvm.git] / tools / llvm-readobj / COFFDumper.cpp
index 7842cd4..4a1d5da 100644 (file)
@@ -20,6 +20,7 @@
 #include "Win64EHDumper.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Object/COFF.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/COFF.h"
@@ -49,23 +50,32 @@ public:
     cacheRelocations();
   }
 
-  virtual void printFileHeaders() override;
-  virtual void printSections() override;
-  virtual void printRelocations() override;
-  virtual void printSymbols() override;
-  virtual void printDynamicSymbols() override;
-  virtual void printUnwindInfo() override;
+  void printFileHeaders() override;
+  void printSections() override;
+  void printRelocations() override;
+  void printSymbols() override;
+  void printDynamicSymbols() override;
+  void printUnwindInfo() override;
+  void printCOFFImports() override;
+  void printCOFFExports() override;
+  void printCOFFDirectives() override;
+  void printCOFFBaseReloc() override;
 
 private:
   void printSymbol(const SymbolRef &Sym);
   void printRelocation(const SectionRef &Section, const RelocationRef &Reloc);
   void printDataDirectory(uint32_t Index, const std::string &FieldName);
 
+  void printDOSHeader(const dos_header *DH);
   template <class PEHeader> void printPEHeader(const PEHeader *Hdr);
   void printBaseOfDataField(const pe32_header *Hdr);
   void printBaseOfDataField(const pe32plus_header *Hdr);
 
-  void printCodeViewLineTables(const SectionRef &Section);
+  void printCodeViewDebugInfo(const SectionRef &Section);
+
+  void printCodeViewSymbolsSubsection(StringRef Subsection,
+                                      const SectionRef &Section,
+                                      uint32_t Offset);
 
   void cacheRelocations();
 
@@ -73,11 +83,17 @@ private:
                                 SymbolRef &Sym);
   std::error_code resolveSymbolName(const coff_section *Section,
                                     uint64_t Offset, StringRef &Name);
+  void printImportedSymbols(iterator_range<imported_symbol_iterator> Range);
+  void printDelayImportedSymbols(
+      const DelayImportDirectoryEntryRef &I,
+      iterator_range<imported_symbol_iterator> Range);
 
   typedef DenseMap<const coff_section*, std::vector<RelocationRef> > RelocMapTy;
 
   const llvm::object::COFFObjectFile *Obj;
   RelocMapTy RelocMap;
+  StringRef CVFileIndexToStringOffsetTable;
+  StringRef CVStringTable;
 };
 
 } // namespace
@@ -126,7 +142,7 @@ std::error_code COFFDumper::resolveSymbolName(const coff_section *Section,
     return EC;
   if (std::error_code EC = Symbol.getName(Name))
     return EC;
-  return object_error::success;
+  return std::error_code();
 }
 
 static const EnumEntry<COFF::MachineTypes> ImageFileMachineType[] = {
@@ -313,9 +329,10 @@ WeakExternalCharacteristics[] = {
 
 template <typename T>
 static std::error_code getSymbolAuxData(const COFFObjectFile *Obj,
-                                        const coff_symbol *Symbol,
-                                        const T *&Aux) {
+                                        COFFSymbolRef Symbol,
+                                        uint8_t AuxSymbolIdx, const T *&Aux) {
   ArrayRef<uint8_t> AuxData = Obj->getSymbolAuxData(Symbol);
+  AuxData = AuxData.slice(AuxSymbolIdx * Obj->getSymbolTableEntrySize());
   Aux = reinterpret_cast<const T*>(AuxData.data());
   return readobj_error::success;
 }
@@ -342,25 +359,20 @@ void COFFDumper::printDataDirectory(uint32_t Index, const std::string &FieldName
 }
 
 void COFFDumper::printFileHeaders() {
-  // Print COFF header
-  const coff_file_header *COFFHeader = nullptr;
-  if (error(Obj->getCOFFHeader(COFFHeader)))
-    return;
-
-  time_t TDS = COFFHeader->TimeDateStamp;
+  time_t TDS = Obj->getTimeDateStamp();
   char FormattedTime[20] = { };
   strftime(FormattedTime, 20, "%Y-%m-%d %H:%M:%S", gmtime(&TDS));
 
   {
     DictScope D(W, "ImageFileHeader");
-    W.printEnum  ("Machine", COFFHeader->Machine,
+    W.printEnum  ("Machine", Obj->getMachine(),
                     makeArrayRef(ImageFileMachineType));
-    W.printNumber("SectionCount", COFFHeader->NumberOfSections);
-    W.printHex   ("TimeDateStamp", FormattedTime, COFFHeader->TimeDateStamp);
-    W.printHex   ("PointerToSymbolTable", COFFHeader->PointerToSymbolTable);
-    W.printNumber("SymbolCount", COFFHeader->NumberOfSymbols);
-    W.printNumber("OptionalHeaderSize", COFFHeader->SizeOfOptionalHeader);
-    W.printFlags ("Characteristics", COFFHeader->Characteristics,
+    W.printNumber("SectionCount", Obj->getNumberOfSections());
+    W.printHex   ("TimeDateStamp", FormattedTime, Obj->getTimeDateStamp());
+    W.printHex   ("PointerToSymbolTable", Obj->getPointerToSymbolTable());
+    W.printNumber("SymbolCount", Obj->getNumberOfSymbols());
+    W.printNumber("OptionalHeaderSize", Obj->getSizeOfOptionalHeader());
+    W.printFlags ("Characteristics", Obj->getCharacteristics(),
                     makeArrayRef(ImageFileCharacteristics));
   }
 
@@ -377,6 +389,30 @@ void COFFDumper::printFileHeaders() {
     return;
   if (PEPlusHeader)
     printPEHeader<pe32plus_header>(PEPlusHeader);
+
+  if (const dos_header *DH = Obj->getDOSHeader())
+    printDOSHeader(DH);
+}
+
+void COFFDumper::printDOSHeader(const dos_header *DH) {
+  DictScope D(W, "DOSHeader");
+  W.printString("Magic", StringRef(DH->Magic, sizeof(DH->Magic)));
+  W.printNumber("UsedBytesInTheLastPage", DH->UsedBytesInTheLastPage);
+  W.printNumber("FileSizeInPages", DH->FileSizeInPages);
+  W.printNumber("NumberOfRelocationItems", DH->NumberOfRelocationItems);
+  W.printNumber("HeaderSizeInParagraphs", DH->HeaderSizeInParagraphs);
+  W.printNumber("MinimumExtraParagraphs", DH->MinimumExtraParagraphs);
+  W.printNumber("MaximumExtraParagraphs", DH->MaximumExtraParagraphs);
+  W.printNumber("InitialRelativeSS", DH->InitialRelativeSS);
+  W.printNumber("InitialSP", DH->InitialSP);
+  W.printNumber("Checksum", DH->Checksum);
+  W.printNumber("InitialIP", DH->InitialIP);
+  W.printNumber("InitialRelativeCS", DH->InitialRelativeCS);
+  W.printNumber("AddressOfRelocationTable", DH->AddressOfRelocationTable);
+  W.printNumber("OverlayNumber", DH->OverlayNumber);
+  W.printNumber("OEMid", DH->OEMid);
+  W.printNumber("OEMinfo", DH->OEMinfo);
+  W.printNumber("AddressOfNewExeHeader", DH->AddressOfNewExeHeader);
 }
 
 template <class PEHeader>
@@ -404,7 +440,7 @@ void COFFDumper::printPEHeader(const PEHeader *Hdr) {
   W.printNumber("SizeOfImage", Hdr->SizeOfImage);
   W.printNumber("SizeOfHeaders", Hdr->SizeOfHeaders);
   W.printEnum  ("Subsystem", Hdr->Subsystem, makeArrayRef(PEWindowsSubsystem));
-  W.printFlags ("Subsystem", Hdr->DLLCharacteristics,
+  W.printFlags ("Characteristics", Hdr->DLLCharacteristics,
                 makeArrayRef(PEDLLCharacteristics));
   W.printNumber("SizeOfStackReserve", Hdr->SizeOfStackReserve);
   W.printNumber("SizeOfStackCommit", Hdr->SizeOfStackCommit);
@@ -433,18 +469,17 @@ void COFFDumper::printBaseOfDataField(const pe32_header *Hdr) {
 
 void COFFDumper::printBaseOfDataField(const pe32plus_header *) {}
 
-void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
+void COFFDumper::printCodeViewDebugInfo(const SectionRef &Section) {
   StringRef Data;
   if (error(Section.getContents(Data)))
     return;
 
   SmallVector<StringRef, 10> FunctionNames;
   StringMap<StringRef> FunctionLineTables;
-  StringRef FileIndexToStringOffsetTable;
-  StringRef StringTable;
 
-  ListScope D(W, "CodeViewLineTables");
+  ListScope D(W, "CodeViewDebugInfo");
   {
+    // FIXME: Add more offset correctness checks.
     DataExtractor DE(Data, true, 4);
     uint32_t Offset = 0,
              Magic = DE.getU32(&Offset);
@@ -468,12 +503,18 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
         return;
       }
 
-      // Print the raw contents to simplify debugging if anything goes wrong
-      // afterwards.
       StringRef Contents = Data.substr(Offset, PayloadSize);
-      W.printBinaryBlock("Contents", Contents);
+      if (opts::CodeViewSubsectionBytes) {
+        // Print the raw contents to simplify debugging if anything goes wrong
+        // afterwards.
+        W.printBinaryBlock("Contents", Contents);
+      }
 
       switch (SubSectionType) {
+      case COFF::DEBUG_SYMBOL_SUBSECTION:
+        if (opts::SectionSymbols)
+          printCodeViewSymbolsSubsection(Contents, Section, Offset);
+        break;
       case COFF::DEBUG_LINE_TABLE_SUBSECTION: {
         // Holds a PC to file:line table.  Some data to parse this subsection is
         // stored in the other subsections, so just check sanity and store the
@@ -502,25 +543,25 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
         break;
       }
       case COFF::DEBUG_STRING_TABLE_SUBSECTION:
-        if (PayloadSize == 0 || StringTable.data() != nullptr ||
+        if (PayloadSize == 0 || CVStringTable.data() != nullptr ||
             Contents.back() != '\0') {
           // Empty or duplicate or non-null-terminated subsection.
           error(object_error::parse_failed);
           return;
         }
-        StringTable = Contents;
+        CVStringTable = Contents;
         break;
       case COFF::DEBUG_INDEX_SUBSECTION:
         // Holds the translation table from file indices
         // to offsets in the string table.
 
         if (PayloadSize == 0 ||
-            FileIndexToStringOffsetTable.data() != nullptr) {
+            CVFileIndexToStringOffsetTable.data() != nullptr) {
           // Empty or duplicate subsection.
           error(object_error::parse_failed);
           return;
         }
-        FileIndexToStringOffsetTable = Contents;
+        CVFileIndexToStringOffsetTable = Contents;
         break;
       }
       Offset += PayloadSize;
@@ -555,7 +596,7 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
 
       uint32_t FilenameOffset;
       {
-        DataExtractor SDE(FileIndexToStringOffsetTable, true, 4);
+        DataExtractor SDE(CVFileIndexToStringOffsetTable, true, 4);
         uint32_t OffsetInSDE = OffsetInIndex;
         if (!SDE.isValidOffset(OffsetInSDE)) {
           error(object_error::parse_failed);
@@ -564,15 +605,15 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
         FilenameOffset = SDE.getU32(&OffsetInSDE);
       }
 
-      if (FilenameOffset == 0 || FilenameOffset + 1 >= StringTable.size() ||
-          StringTable.data()[FilenameOffset - 1] != '\0') {
+      if (FilenameOffset == 0 || FilenameOffset + 1 >= CVStringTable.size() ||
+          CVStringTable.data()[FilenameOffset - 1] != '\0') {
         // Each string in an F3 subsection should be preceded by a null
         // character.
         error(object_error::parse_failed);
         return;
       }
 
-      StringRef Filename(StringTable.data() + FilenameOffset);
+      StringRef Filename(CVStringTable.data() + FilenameOffset);
       ListScope S(W, "FilenameSegment");
       W.printString("Filename", Filename);
       for (unsigned J = 0; J != SegmentLength && DE.isValidOffset(Offset);
@@ -593,6 +634,90 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
   }
 }
 
+void COFFDumper::printCodeViewSymbolsSubsection(StringRef Subsection,
+                                                const SectionRef &Section,
+                                                uint32_t OffsetInSection) {
+  if (Subsection.size() == 0) {
+    error(object_error::parse_failed);
+    return;
+  }
+  DataExtractor DE(Subsection, true, 4);
+  uint32_t Offset = 0;
+
+  // Function-level subsections have "procedure start" and "procedure end"
+  // commands that should come in pairs and surround relevant info.
+  bool InFunctionScope = false;
+  while (DE.isValidOffset(Offset)) {
+    // Read subsection segments one by one.
+    uint16_t Size = DE.getU16(&Offset);
+    // The section size includes the size of the type identifier.
+    if (Size < 2 || !DE.isValidOffsetForDataOfSize(Offset, Size)) {
+      error(object_error::parse_failed);
+      return;
+    }
+    Size -= 2;
+    uint16_t Type = DE.getU16(&Offset);
+    switch (Type) {
+    case COFF::DEBUG_SYMBOL_TYPE_PROC_START: {
+      DictScope S(W, "ProcStart");
+      if (InFunctionScope || Size < 36) {
+        error(object_error::parse_failed);
+        return;
+      }
+      InFunctionScope = true;
+
+      // We're currently interested in a limited subset of fields in this
+      // segment, just ignore the rest of the fields for now.
+      uint8_t Unused[12];
+      DE.getU8(&Offset, Unused, 12);
+      uint32_t CodeSize = DE.getU32(&Offset);
+      DE.getU8(&Offset, Unused, 12);
+      StringRef SectionName;
+      if (error(resolveSymbolName(Obj->getCOFFSection(Section),
+                                  OffsetInSection + Offset, SectionName)))
+        return;
+      Offset += 4;
+      DE.getU8(&Offset, Unused, 3);
+      StringRef DisplayName = DE.getCStr(&Offset);
+      if (!DE.isValidOffset(Offset)) {
+        error(object_error::parse_failed);
+        return;
+      }
+      W.printString("DisplayName", DisplayName);
+      W.printString("Section", SectionName);
+      W.printHex("CodeSize", CodeSize);
+
+      break;
+    }
+    case COFF::DEBUG_SYMBOL_TYPE_PROC_END: {
+      W.startLine() << "ProcEnd\n";
+      if (!InFunctionScope || Size > 0) {
+        error(object_error::parse_failed);
+        return;
+      }
+      InFunctionScope = false;
+      break;
+    }
+    default: {
+      if (opts::CodeViewSubsectionBytes) {
+        ListScope S(W, "Record");
+        W.printHex("Size", Size);
+        W.printHex("Type", Type);
+
+        StringRef Contents = DE.getData().substr(Offset, Size);
+        W.printBinaryBlock("Contents", Contents);
+      }
+
+      Offset += Size;
+      break;
+    }
+    }
+  }
+
+  if (InFunctionScope)
+    error(object_error::parse_failed);
+}
+
 void COFFDumper::printSections() {
   ListScope SectionsD(W, "Sections");
   int SectionNumber = 0;
@@ -628,18 +753,18 @@ void COFFDumper::printSections() {
     if (opts::SectionSymbols) {
       ListScope D(W, "Symbols");
       for (const SymbolRef &Symbol : Obj->symbols()) {
-        bool Contained = false;
-        if (Sec.containsSymbol(Symbol, Contained) || !Contained)
+        if (!Sec.containsSymbol(Symbol))
           continue;
 
         printSymbol(Symbol);
       }
     }
 
-    if (Name == ".debug$S" && opts::CodeViewLineTables)
-      printCodeViewLineTables(Sec);
+    if (Name == ".debug$S" && opts::CodeView)
+      printCodeViewDebugInfo(Sec);
 
-    if (opts::SectionData) {
+    if (opts::SectionData &&
+        !(Section->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)) {
       StringRef Data;
       if (error(Sec.getContents(Data)))
         break;
@@ -683,7 +808,6 @@ void COFFDumper::printRelocation(const SectionRef &Section,
   uint64_t RelocType;
   SmallString<32> RelocName;
   StringRef SymbolName;
-  StringRef Contents;
   if (error(Reloc.getOffset(Offset)))
     return;
   if (error(Reloc.getType(RelocType)))
@@ -691,21 +815,19 @@ void COFFDumper::printRelocation(const SectionRef &Section,
   if (error(Reloc.getTypeName(RelocName)))
     return;
   symbol_iterator Symbol = Reloc.getSymbol();
-  if (error(Symbol->getName(SymbolName)))
-    return;
-  if (error(Section.getContents(Contents)))
+  if (Symbol != Obj->symbol_end() && error(Symbol->getName(SymbolName)))
     return;
 
   if (opts::ExpandRelocs) {
     DictScope Group(W, "Relocation");
     W.printHex("Offset", Offset);
     W.printNumber("Type", RelocName, RelocType);
-    W.printString("Symbol", SymbolName.size() > 0 ? SymbolName : "-");
+    W.printString("Symbol", SymbolName.empty() ? "-" : SymbolName);
   } else {
     raw_ostream& OS = W.startLine();
     OS << W.hex(Offset)
        << " " << RelocName
-       << " " << (SymbolName.size() > 0 ? SymbolName : "-")
+       << " " << (SymbolName.empty() ? "-" : SymbolName)
        << "\n";
   }
 }
@@ -719,12 +841,30 @@ void COFFDumper::printSymbols() {
 
 void COFFDumper::printDynamicSymbols() { ListScope Group(W, "DynamicSymbols"); }
 
+static ErrorOr<StringRef>
+getSectionName(const llvm::object::COFFObjectFile *Obj, int32_t SectionNumber,
+               const coff_section *Section) {
+  if (Section) {
+    StringRef SectionName;
+    if (std::error_code EC = Obj->getSectionName(Section, SectionName))
+      return EC;
+    return SectionName;
+  }
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_DEBUG)
+    return StringRef("IMAGE_SYM_DEBUG");
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_ABSOLUTE)
+    return StringRef("IMAGE_SYM_ABSOLUTE");
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_UNDEFINED)
+    return StringRef("IMAGE_SYM_UNDEFINED");
+  return StringRef("");
+}
+
 void COFFDumper::printSymbol(const SymbolRef &Sym) {
   DictScope D(W, "Symbol");
 
-  const coff_symbol *Symbol = Obj->getCOFFSymbol(Sym);
+  COFFSymbolRef Symbol = Obj->getCOFFSymbol(Sym);
   const coff_section *Section;
-  if (std::error_code EC = Obj->getSection(Symbol->SectionNumber, Section)) {
+  if (std::error_code EC = Obj->getSection(Symbol.getSectionNumber(), Section)) {
     W.startLine() << "Invalid section number: " << EC.message() << "\n";
     W.flush();
     return;
@@ -735,23 +875,25 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
     SymbolName = "";
 
   StringRef SectionName = "";
-  if (Section)
-    Obj->getSectionName(Section, SectionName);
+  ErrorOr<StringRef> Res =
+      getSectionName(Obj, Symbol.getSectionNumber(), Section);
+  if (Res)
+    SectionName = *Res;
 
   W.printString("Name", SymbolName);
-  W.printNumber("Value", Symbol->Value);
-  W.printNumber("Section", SectionName, Symbol->SectionNumber);
-  W.printEnum  ("BaseType", Symbol->getBaseType(), makeArrayRef(ImageSymType));
-  W.printEnum  ("ComplexType", Symbol->getComplexType(),
+  W.printNumber("Value", Symbol.getValue());
+  W.printNumber("Section", SectionName, Symbol.getSectionNumber());
+  W.printEnum  ("BaseType", Symbol.getBaseType(), makeArrayRef(ImageSymType));
+  W.printEnum  ("ComplexType", Symbol.getComplexType(),
                                                    makeArrayRef(ImageSymDType));
-  W.printEnum  ("StorageClass", Symbol->StorageClass,
+  W.printEnum  ("StorageClass", Symbol.getStorageClass(),
                                                    makeArrayRef(ImageSymClass));
-  W.printNumber("AuxSymbolCount", Symbol->NumberOfAuxSymbols);
+  W.printNumber("AuxSymbolCount", Symbol.getNumberOfAuxSymbols());
 
-  for (unsigned I = 0; I < Symbol->NumberOfAuxSymbols; ++I) {
-    if (Symbol->isFunctionDefinition()) {
+  for (uint8_t I = 0; I < Symbol.getNumberOfAuxSymbols(); ++I) {
+    if (Symbol.isFunctionDefinition()) {
       const coff_aux_function_definition *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
       DictScope AS(W, "AuxFunctionDef");
@@ -759,18 +901,16 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("TotalSize", Aux->TotalSize);
       W.printHex("PointerToLineNumber", Aux->PointerToLinenumber);
       W.printHex("PointerToNextFunction", Aux->PointerToNextFunction);
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
-    } else if (Symbol->isWeakExternal()) {
+    } else if (Symbol.isAnyUndefined()) {
       const coff_aux_weak_external *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
-      const coff_symbol *Linked;
+      ErrorOr<COFFSymbolRef> Linked = Obj->getSymbol(Aux->TagIndex);
       StringRef LinkedName;
-      std::error_code EC;
-      if ((EC = Obj->getSymbol(Aux->TagIndex, Linked)) ||
-          (EC = Obj->getSymbolName(Linked, LinkedName))) {
+      std::error_code EC = Linked.getError();
+      if (EC || (EC = Obj->getSymbolName(*Linked, LinkedName))) {
         LinkedName = "";
         error(EC);
       }
@@ -779,56 +919,60 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("Linked", LinkedName, Aux->TagIndex);
       W.printEnum  ("Search", Aux->Characteristics,
                     makeArrayRef(WeakExternalCharacteristics));
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
-    } else if (Symbol->isFileRecord()) {
-      const coff_aux_file *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+    } else if (Symbol.isFileRecord()) {
+      const char *FileName;
+      if (error(getSymbolAuxData(Obj, Symbol, I, FileName)))
         break;
 
       DictScope AS(W, "AuxFileRecord");
 
-      StringRef Name(Aux->FileName,
-                     Symbol->NumberOfAuxSymbols * COFF::SymbolSize);
+      StringRef Name(FileName, Symbol.getNumberOfAuxSymbols() *
+                                   Obj->getSymbolTableEntrySize());
       W.printString("FileName", Name.rtrim(StringRef("\0", 1)));
       break;
-    } else if (Symbol->isSectionDefinition()) {
+    } else if (Symbol.isSectionDefinition()) {
       const coff_aux_section_definition *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
+      int32_t AuxNumber = Aux->getNumber(Symbol.isBigObj());
+
       DictScope AS(W, "AuxSectionDef");
       W.printNumber("Length", Aux->Length);
       W.printNumber("RelocationCount", Aux->NumberOfRelocations);
       W.printNumber("LineNumberCount", Aux->NumberOfLinenumbers);
       W.printHex("Checksum", Aux->CheckSum);
-      W.printNumber("Number", Aux->Number);
+      W.printNumber("Number", AuxNumber);
       W.printEnum("Selection", Aux->Selection, makeArrayRef(ImageCOMDATSelect));
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
       if (Section && Section->Characteristics & COFF::IMAGE_SCN_LNK_COMDAT
           && Aux->Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) {
         const coff_section *Assoc;
-        StringRef AssocName;
-        std::error_code EC;
-        if ((EC = Obj->getSection(Aux->Number, Assoc)) ||
-            (EC = Obj->getSectionName(Assoc, AssocName))) {
+        StringRef AssocName = "";
+        std::error_code EC = Obj->getSection(AuxNumber, Assoc);
+        ErrorOr<StringRef> Res = getSectionName(Obj, AuxNumber, Assoc);
+        if (Res)
+          AssocName = *Res;
+        if (!EC)
+          EC = Res.getError();
+        if (EC) {
           AssocName = "";
           error(EC);
         }
 
-        W.printNumber("AssocSection", AssocName, Aux->Number);
+        W.printNumber("AssocSection", AssocName, AuxNumber);
       }
-    } else if (Symbol->isCLRToken()) {
+    } else if (Symbol.isCLRToken()) {
       const coff_aux_clr_token *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
-      const coff_symbol *ReferredSym;
+      ErrorOr<COFFSymbolRef> ReferredSym =
+          Obj->getSymbol(Aux->SymbolTableIndex);
       StringRef ReferredName;
-      std::error_code EC;
-      if ((EC = Obj->getSymbol(Aux->SymbolTableIndex, ReferredSym)) ||
-          (EC = Obj->getSymbolName(ReferredSym, ReferredName))) {
+      std::error_code EC = ReferredSym.getError();
+      if (EC || (EC = Obj->getSymbolName(*ReferredSym, ReferredName))) {
         ReferredName = "";
         error(EC);
       }
@@ -837,7 +981,6 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("AuxType", Aux->AuxType);
       W.printNumber("Reserved", Aux->Reserved);
       W.printNumber("SymbolTableIndex", ReferredName, Aux->SymbolTableIndex);
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
     } else {
       W.startLine() << "<unhandled auxiliary record>\n";
@@ -846,12 +989,8 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
 }
 
 void COFFDumper::printUnwindInfo() {
-  const coff_file_header *Header;
-  if (error(Obj->getCOFFHeader(Header)))
-    return;
-
   ListScope D(W, "UnwindInformation");
-  switch (Header->Machine) {
+  switch (Obj->getMachine()) {
   case COFF::IMAGE_FILE_MACHINE_AMD64: {
     Win64EH::Dumper Dumper(W);
     Win64EH::Dumper::SymbolResolver
@@ -870,9 +1009,134 @@ void COFFDumper::printUnwindInfo() {
     break;
   }
   default:
-    W.printEnum("unsupported Image Machine", Header->Machine,
+    W.printEnum("unsupported Image Machine", Obj->getMachine(),
                 makeArrayRef(ImageFileMachineType));
     break;
   }
 }
 
+void COFFDumper::printImportedSymbols(
+    iterator_range<imported_symbol_iterator> Range) {
+  for (const ImportedSymbolRef &I : Range) {
+    StringRef Sym;
+    if (error(I.getSymbolName(Sym))) return;
+    uint16_t Ordinal;
+    if (error(I.getOrdinal(Ordinal))) return;
+    W.printNumber("Symbol", Sym, Ordinal);
+  }
+}
+
+void COFFDumper::printDelayImportedSymbols(
+    const DelayImportDirectoryEntryRef &I,
+    iterator_range<imported_symbol_iterator> Range) {
+  int Index = 0;
+  for (const ImportedSymbolRef &S : Range) {
+    DictScope Import(W, "Import");
+    StringRef Sym;
+    if (error(S.getSymbolName(Sym))) return;
+    uint16_t Ordinal;
+    if (error(S.getOrdinal(Ordinal))) return;
+    W.printNumber("Symbol", Sym, Ordinal);
+    uint64_t Addr;
+    if (error(I.getImportAddress(Index++, Addr))) return;
+    W.printHex("Address", Addr);
+  }
+}
+
+void COFFDumper::printCOFFImports() {
+  // Regular imports
+  for (const ImportDirectoryEntryRef &I : Obj->import_directories()) {
+    DictScope Import(W, "Import");
+    StringRef Name;
+    if (error(I.getName(Name))) return;
+    W.printString("Name", Name);
+    uint32_t Addr;
+    if (error(I.getImportLookupTableRVA(Addr))) return;
+    W.printHex("ImportLookupTableRVA", Addr);
+    if (error(I.getImportAddressTableRVA(Addr))) return;
+    W.printHex("ImportAddressTableRVA", Addr);
+    printImportedSymbols(I.imported_symbols());
+  }
+
+  // Delay imports
+  for (const DelayImportDirectoryEntryRef &I : Obj->delay_import_directories()) {
+    DictScope Import(W, "DelayImport");
+    StringRef Name;
+    if (error(I.getName(Name))) return;
+    W.printString("Name", Name);
+    const delay_import_directory_table_entry *Table;
+    if (error(I.getDelayImportTable(Table))) return;
+    W.printHex("Attributes", Table->Attributes);
+    W.printHex("ModuleHandle", Table->ModuleHandle);
+    W.printHex("ImportAddressTable", Table->DelayImportAddressTable);
+    W.printHex("ImportNameTable", Table->DelayImportNameTable);
+    W.printHex("BoundDelayImportTable", Table->BoundDelayImportTable);
+    W.printHex("UnloadDelayImportTable", Table->UnloadDelayImportTable);
+    printDelayImportedSymbols(I, I.imported_symbols());
+  }
+}
+
+void COFFDumper::printCOFFExports() {
+  for (const ExportDirectoryEntryRef &E : Obj->export_directories()) {
+    DictScope Export(W, "Export");
+
+    StringRef Name;
+    uint32_t Ordinal, RVA;
+
+    if (error(E.getSymbolName(Name)))
+      continue;
+    if (error(E.getOrdinal(Ordinal)))
+      continue;
+    if (error(E.getExportRVA(RVA)))
+      continue;
+
+    W.printNumber("Ordinal", Ordinal);
+    W.printString("Name", Name);
+    W.printHex("RVA", RVA);
+  }
+}
+
+void COFFDumper::printCOFFDirectives() {
+  for (const SectionRef &Section : Obj->sections()) {
+    StringRef Contents;
+    StringRef Name;
+
+    if (error(Section.getName(Name)))
+      continue;
+    if (Name != ".drectve")
+      continue;
+
+    if (error(Section.getContents(Contents)))
+      return;
+
+    W.printString("Directive(s)", Contents);
+  }
+}
+
+static StringRef getBaseRelocTypeName(uint8_t Type) {
+  switch (Type) {
+  case COFF::IMAGE_REL_BASED_ABSOLUTE: return "ABSOLUTE";
+  case COFF::IMAGE_REL_BASED_HIGH: return "HIGH";
+  case COFF::IMAGE_REL_BASED_LOW: return "LOW";
+  case COFF::IMAGE_REL_BASED_HIGHLOW: return "HIGHLOW";
+  case COFF::IMAGE_REL_BASED_HIGHADJ: return "HIGHADJ";
+  case COFF::IMAGE_REL_BASED_ARM_MOV32T: return "ARM_MOV32(T)";
+  case COFF::IMAGE_REL_BASED_DIR64: return "DIR64";
+  default: return "unknown (" + llvm::utostr(Type) + ")";
+  }
+}
+
+void COFFDumper::printCOFFBaseReloc() {
+  ListScope D(W, "BaseReloc");
+  for (const BaseRelocRef &I : Obj->base_relocs()) {
+    uint8_t Type;
+    uint32_t RVA;
+    if (error(I.getRVA(RVA)))
+      continue;
+    if (error(I.getType(Type)))
+      continue;
+    DictScope Import(W, "Entry");
+    W.printString("Type", getBaseRelocTypeName(Type));
+    W.printHex("Address", RVA);
+  }
+}