Vendor import of llvm trunk r238337:

https://llvm.org/svn/llvm-project/llvm/trunk@238337

12 files changed, 327 insertions, 57 deletions

diff --git a/include/llvm/Object/Archive.h b/include/llvm/Object/Archive.h
index 4e96205..8da6919 100644
--- a/include/llvm/Object/Archive.h
+++ b/include/llvm/Object/Archive.h
@@ -41,6 +41,9 @@ struct ArchiveMemberHeader {
 
   sys::fs::perms getAccessMode() const;
   sys::TimeValue getLastModified() const;
+  llvm::StringRef getRawLastModified() const {
+    return StringRef(LastModified, sizeof(LastModified)).rtrim(" ");
+  }
   unsigned getUID() const;
   unsigned getGID() const;
 };
@@ -78,6 +81,9 @@ public:
     sys::TimeValue getLastModified() const {
       return getHeader()->getLastModified();
     }
+    StringRef getRawLastModified() const {
+      return getHeader()->getRawLastModified();
+    }
     unsigned getUID() const { return getHeader()->getUID(); }
     unsigned getGID() const { return getHeader()->getGID(); }
     sys::fs::perms getAccessMode() const {
@@ -85,10 +91,13 @@ public:
     }
     /// \return the size of the archive member without the header or padding.
     uint64_t getSize() const;
+    /// \return the size in the archive header for this member.
+    uint64_t getRawSize() const;
 
     StringRef getBuffer() const {
       return StringRef(Data.data() + StartOfFile, getSize());
     }
+    uint64_t getChildOffset() const;
 
     ErrorOr<MemoryBufferRef> getMemoryBufferRef() const;
 
@@ -146,9 +155,8 @@ public:
     Symbol symbol;
   public:
     symbol_iterator(const Symbol &s) : symbol(s) {}
-    const Symbol *operator->() const {
-      return &symbol;
-    }
+    const Symbol *operator->() const { return &symbol; }
+    const Symbol &operator*() const { return symbol; }
 
     bool operator==(const symbol_iterator &other) const {
       return symbol == other.symbol;
@@ -169,6 +177,7 @@ public:
 
   enum Kind {
     K_GNU,
+    K_MIPS64,
     K_BSD,
     K_COFF
   };
@@ -184,6 +193,9 @@ public:
 
   symbol_iterator symbol_begin() const;
   symbol_iterator symbol_end() const;
+  iterator_range<symbol_iterator> symbols() const {
+    return iterator_range<symbol_iterator>(symbol_begin(), symbol_end());
+  }
 
   // Cast methods.
   static inline bool classof(Binary const *v) {
@@ -194,6 +206,8 @@ public:
   child_iterator findSym(StringRef name) const;
 
   bool hasSymbolTable() const;
+  child_iterator getSymbolTableChild() const { return SymbolTable; }
+  uint32_t getNumberOfSymbols() const;
 
 private:
   child_iterator SymbolTable;
diff --git a/include/llvm/Object/Binary.h b/include/llvm/Object/Binary.h
index 4b2b7e6..a3d6d0d 100644
--- a/include/llvm/Object/Binary.h
+++ b/include/llvm/Object/Binary.h
@@ -28,8 +28,8 @@ namespace object {
 
 class Binary {
 private:
-  Binary() LLVM_DELETED_FUNCTION;
-  Binary(const Binary &other) LLVM_DELETED_FUNCTION;
+  Binary() = delete;
+  Binary(const Binary &other) = delete;
 
   unsigned int TypeID;
 
diff --git a/include/llvm/Object/COFF.h b/include/llvm/Object/COFF.h
index 522bf68..ccac020 100644
--- a/include/llvm/Object/COFF.h
+++ b/include/llvm/Object/COFF.h
@@ -314,6 +314,10 @@ public:
     return (getType() & 0xF0) >> COFF::SCT_COMPLEX_TYPE_SHIFT;
   }
 
+  bool isAbsolute() const {
+    return getSectionNumber() == -1;
+  }
+
   bool isExternal() const {
     return getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL;
   }
@@ -350,6 +354,10 @@ public:
     return getStorageClass() == COFF::IMAGE_SYM_CLASS_FILE;
   }
 
+  bool isSection() const {
+    return getStorageClass() == COFF::IMAGE_SYM_CLASS_SECTION;
+  }
+
   bool isSectionDefinition() const {
     // C++/CLI creates external ABS symbols for non-const appdomain globals.
     // These are also followed by an auxiliary section definition.
@@ -441,6 +449,27 @@ struct coff_aux_clr_token {
   support::ulittle32_t SymbolTableIndex;
 };
 
+struct coff_import_header {
+  support::ulittle16_t Sig1;
+  support::ulittle16_t Sig2;
+  support::ulittle16_t Version;
+  support::ulittle16_t Machine;
+  support::ulittle32_t TimeDateStamp;
+  support::ulittle32_t SizeOfData;
+  support::ulittle16_t OrdinalHint;
+  support::ulittle16_t TypeInfo;
+  int getType() const { return TypeInfo & 0x3; }
+  int getNameType() const { return (TypeInfo & 0x7) >> 2; }
+};
+
+struct coff_import_directory_table_entry {
+  support::ulittle32_t ImportLookupTableRVA;
+  support::ulittle32_t TimeDateStamp;
+  support::ulittle32_t ForwarderChain;
+  support::ulittle32_t NameRVA;
+  support::ulittle32_t ImportAddressTableRVA;
+};
+
 struct coff_load_configuration32 {
   support::ulittle32_t Characteristics;
   support::ulittle32_t TimeDateStamp;
@@ -612,6 +641,7 @@ protected:
   std::error_code getRelocationOffset(DataRefImpl Rel,
                                       uint64_t &Res) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
+  section_iterator getRelocationSection(DataRefImpl Rel) const override;
   std::error_code getRelocationType(DataRefImpl Rel,
                                     uint64_t &Res) const override;
   std::error_code
diff --git a/include/llvm/Object/ELF.h b/include/llvm/Object/ELF.h
index 7c10bbf..ddabf59 100644
--- a/include/llvm/Object/ELF.h
+++ b/include/llvm/Object/ELF.h
@@ -94,18 +94,24 @@ public:
       return *this;
     }
 
+    ELFEntityIterator &operator+(difference_type n) {
+      assert(Current && "Attempted to increment an invalid iterator!");
+      Current += (n * EntitySize);
+      return *this;
+    }
+
+    ELFEntityIterator &operator-(difference_type n) {
+      assert(Current && "Attempted to subtract an invalid iterator!");
+      Current -= (n * EntitySize);
+      return *this;
+    }
+
     ELFEntityIterator operator ++(int) {
       ELFEntityIterator Tmp = *this;
       ++*this;
       return Tmp;
     }
 
-    ELFEntityIterator &operator =(const ELFEntityIterator &Other) {
-      EntitySize = Other.EntitySize;
-      Current = Other.Current;
-      return *this;
-    }
-
     difference_type operator -(const ELFEntityIterator &Other) const {
       assert(EntitySize == Other.EntitySize &&
              "Subtracting iterators of different EntitySize!");
@@ -203,12 +209,6 @@ public:
       return *this;
     }
 
-    Elf_Sym_Iter &operator=(const Elf_Sym_Iter &Other) {
-      EntitySize = Other.EntitySize;
-      Current = Other.Current;
-      return *this;
-    }
-
     difference_type operator-(const Elf_Sym_Iter &Other) const {
       assert(EntitySize == Other.EntitySize &&
              "Subtracting iterators of different EntitySize!");
diff --git a/include/llvm/Object/ELFObjectFile.h b/include/llvm/Object/ELFObjectFile.h
index c2d6438..9bd4c32 100644
--- a/include/llvm/Object/ELFObjectFile.h
+++ b/include/llvm/Object/ELFObjectFile.h
@@ -86,6 +86,7 @@ protected:
   std::error_code getSymbolOther(DataRefImpl Symb, uint8_t &Res) const override;
   std::error_code getSymbolType(DataRefImpl Symb,
                                 SymbolRef::Type &Res) const override;
+  section_iterator getSymbolSection(const Elf_Sym *Symb) const;
   std::error_code getSymbolSection(DataRefImpl Symb,
                                    section_iterator &Res) const override;
 
@@ -112,6 +113,7 @@ protected:
   std::error_code getRelocationOffset(DataRefImpl Rel,
                                       uint64_t &Res) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
+  section_iterator getRelocationSection(DataRefImpl Rel) const override;
   std::error_code getRelocationType(DataRefImpl Rel,
                                     uint64_t &Res) const override;
   std::error_code
@@ -177,6 +179,20 @@ protected:
     return DRI;
   }
 
+  bool isExportedToOtherDSO(const Elf_Sym *ESym) const {
+    unsigned char Binding = ESym->getBinding();
+    unsigned char Visibility = ESym->getVisibility();
+
+    // A symbol is exported if its binding is either GLOBAL or WEAK, and its
+    // visibility is either DEFAULT or PROTECTED. All other symbols are not
+    // exported.
+    if ((Binding == ELF::STB_GLOBAL || Binding == ELF::STB_WEAK) &&
+        (Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_PROTECTED))
+      return true;
+
+    return false;
+  }
+
   // This flag is used for classof, to distinguish ELFObjectFile from
   // its subclass. If more subclasses will be created, this flag will
   // have to become an enum.
@@ -300,8 +316,11 @@ std::error_code ELFObjectFile<ELFT>::getSymbolAddress(DataRefImpl Symb,
       ESym->getType() == ELF::STT_FUNC)
     Result &= ~1;
 
-  if (Header->e_type == ELF::ET_REL)
-    Result += EF.getSection(ESym)->sh_addr;
+  if (Header->e_type == ELF::ET_REL) {
+    const typename ELFFile<ELFT>::Elf_Shdr * Section = EF.getSection(ESym);
+    if (Section != nullptr)
+      Result += Section->sh_addr;
+  }
 
   return object_error::success;
 }
@@ -389,22 +408,33 @@ uint32_t ELFObjectFile<ELFT>::getSymbolFlags(DataRefImpl Symb) const {
       EF.getSymbolTableIndex(ESym) == ELF::SHN_COMMON)
     Result |= SymbolRef::SF_Common;
 
+  if (isExportedToOtherDSO(ESym))
+    Result |= SymbolRef::SF_Exported;
+
+  if (ESym->getVisibility() == ELF::STV_HIDDEN)
+    Result |= SymbolRef::SF_Hidden;
+
   return Result;
 }
 
 template <class ELFT>
-std::error_code
-ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
-                                      section_iterator &Res) const {
-  const Elf_Sym *ESym = getSymbol(Symb);
+section_iterator
+ELFObjectFile<ELFT>::getSymbolSection(const Elf_Sym *ESym) const {
   const Elf_Shdr *ESec = EF.getSection(ESym);
   if (!ESec)
-    Res = section_end();
+    return section_end();
   else {
     DataRefImpl Sec;
     Sec.p = reinterpret_cast<intptr_t>(ESec);
-    Res = section_iterator(SectionRef(Sec, this));
+    return section_iterator(SectionRef(Sec, this));
   }
+}
+
+template <class ELFT>
+std::error_code
+ELFObjectFile<ELFT>::getSymbolSection(DataRefImpl Symb,
+                                      section_iterator &Res) const {
+  Res = getSymbolSection(getSymbol(Symb));
   return object_error::success;
 }
 
@@ -565,6 +595,20 @@ ELFObjectFile<ELFT>::getRelocationSymbol(DataRefImpl Rel) const {
   return symbol_iterator(SymbolRef(SymbolData, this));
 }
 
+// ELF relocations can target sections, by targetting a symbol of type
+// STT_SECTION
+template <class ELFT>
+section_iterator
+ELFObjectFile<ELFT>::getRelocationSection(DataRefImpl Rel) const {
+  symbol_iterator Sym = getRelocationSymbol(Rel);
+  if (Sym == symbol_end())
+    return section_end();
+  const Elf_Sym *ESym = getSymbol(Sym->getRawDataRefImpl());
+  if (ESym->getType() != ELF::STT_SECTION)
+    return section_end();
+  return getSymbolSection(ESym);
+}
+
 template <class ELFT>
 std::error_code
 ELFObjectFile<ELFT>::getRelocationAddress(DataRefImpl Rel,
@@ -908,7 +952,7 @@ unsigned ELFObjectFile<ELFT>::getArch() const {
 
   case ELF::EM_SPARC:
   case ELF::EM_SPARC32PLUS:
-    return Triple::sparc;
+    return IsLittleEndian ? Triple::sparcel : Triple::sparc;
   case ELF::EM_SPARCV9:
     return Triple::sparcv9;
 
diff --git a/include/llvm/Object/ELFTypes.h b/include/llvm/Object/ELFTypes.h
index 4bc0c7c..287d367 100644
--- a/include/llvm/Object/ELFTypes.h
+++ b/include/llvm/Object/ELFTypes.h
@@ -189,7 +189,15 @@ struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
   }
 
   /// Access to the STV_xxx flag stored in the first two bits of st_other.
+  /// STV_DEFAULT: 0
+  /// STV_INTERNAL: 1
+  /// STV_HIDDEN: 2
+  /// STV_PROTECTED: 3
   unsigned char getVisibility() const { return st_other & 0x3; }
+  void setVisibility(unsigned char v) {
+    assert(v < 4 && "Invalid value for visibility");
+    st_other = (st_other & ~0x3) | v;
+  }
 };
 
 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section
@@ -302,7 +310,10 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, MaxAlign, false>, false> {
     assert(!isMips64EL);
     return r_info;
   }
-  void setRInfo(uint32_t R) { r_info = R; }
+  void setRInfo(uint32_t R, bool IsMips64EL) {
+    assert(!IsMips64EL);
+    r_info = R;
+  }
 };
 
 template <endianness TargetEndianness, std::size_t MaxAlign>
@@ -321,9 +332,12 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, MaxAlign, true>, false> {
     return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
            ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
   }
-  void setRInfo(uint64_t R) {
-    // FIXME: Add mips64el support.
-    r_info = R;
+  void setRInfo(uint64_t R, bool IsMips64EL) {
+    if (IsMips64EL)
+      r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) |
+               ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56);
+    else
+      r_info = R;
   }
 };
 
@@ -338,7 +352,10 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, MaxAlign, false>, true> {
     assert(!isMips64EL);
     return r_info;
   }
-  void setRInfo(uint32_t R) { r_info = R; }
+  void setRInfo(uint32_t R, bool IsMips64EL) {
+    assert(!IsMips64EL);
+    r_info = R;
+  }
 };
 
 template <endianness TargetEndianness, std::size_t MaxAlign>
@@ -358,9 +375,12 @@ struct Elf_Rel_Base<ELFType<TargetEndianness, MaxAlign, true>, true> {
     return (t << 32) | ((t >> 8) & 0xff000000) | ((t >> 24) & 0x00ff0000) |
            ((t >> 40) & 0x0000ff00) | ((t >> 56) & 0x000000ff);
   }
-  void setRInfo(uint64_t R) {
-    // FIXME: Add mips64el support.
-    r_info = R;
+  void setRInfo(uint64_t R, bool IsMips64EL) {
+    if (IsMips64EL)
+      r_info = (R >> 32) | ((R & 0xff000000) << 8) | ((R & 0x00ff0000) << 24) |
+               ((R & 0x0000ff00) << 40) | ((R & 0x000000ff) << 56);
+    else
+      r_info = R;
   }
 };
 
@@ -380,10 +400,14 @@ struct Elf_Rel_Impl<ELFType<TargetEndianness, MaxAlign, true>,
   uint32_t getType(bool isMips64EL) const {
     return (uint32_t)(this->getRInfo(isMips64EL) & 0xffffffffL);
   }
-  void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
-  void setType(uint32_t t) { setSymbolAndType(getSymbol(), t); }
-  void setSymbolAndType(uint32_t s, uint32_t t) {
-    this->setRInfo(((uint64_t)s << 32) + (t & 0xffffffffL));
+  void setSymbol(uint32_t s, bool IsMips64EL) {
+    setSymbolAndType(s, getType(), IsMips64EL);
+  }
+  void setType(uint32_t t, bool IsMips64EL) {
+    setSymbolAndType(getSymbol(), t, IsMips64EL);
+  }
+  void setSymbolAndType(uint32_t s, uint32_t t, bool IsMips64EL) {
+    this->setRInfo(((uint64_t)s << 32) + (t & 0xffffffffL), IsMips64EL);
   }
 };
 
@@ -401,10 +425,14 @@ struct Elf_Rel_Impl<ELFType<TargetEndianness, MaxAlign, false>,
   unsigned char getType(bool isMips64EL) const {
     return (unsigned char)(this->getRInfo(isMips64EL) & 0x0ff);
   }
-  void setSymbol(uint32_t s) { setSymbolAndType(s, getType()); }
-  void setType(unsigned char t) { setSymbolAndType(getSymbol(), t); }
-  void setSymbolAndType(uint32_t s, unsigned char t) {
-    this->setRInfo((s << 8) + t);
+  void setSymbol(uint32_t s, bool IsMips64EL) {
+    setSymbolAndType(s, getType(), IsMips64EL);
+  }
+  void setType(unsigned char t, bool IsMips64EL) {
+    setSymbolAndType(getSymbol(), t, IsMips64EL);
+  }
+  void setSymbolAndType(uint32_t s, unsigned char t, bool IsMips64EL) {
+    this->setRInfo((s << 8) + t, IsMips64EL);
   }
 };
 
@@ -461,6 +489,59 @@ struct Elf_Phdr_Impl<ELFType<TargetEndianness, MaxAlign, true> > {
   Elf_Xword p_align;  // Segment alignment constraint
 };
 
+// MIPS .reginfo section
+template <class ELFT>
+struct Elf_Mips_RegInfo;
+
+template <llvm::support::endianness TargetEndianness, std::size_t MaxAlign>
+struct Elf_Mips_RegInfo<ELFType<TargetEndianness, MaxAlign, false>> {
+  LLVM_ELF_IMPORT_TYPES(TargetEndianness, MaxAlign, false)
+  Elf_Word ri_gprmask;     // bit-mask of used general registers
+  Elf_Word ri_cprmask[4];  // bit-mask of used co-processor registers
+  Elf_Addr ri_gp_value;    // gp register value
+};
+
+template <llvm::support::endianness TargetEndianness, std::size_t MaxAlign>
+struct Elf_Mips_RegInfo<ELFType<TargetEndianness, MaxAlign, true>> {
+  LLVM_ELF_IMPORT_TYPES(TargetEndianness, MaxAlign, true)
+  Elf_Word ri_gprmask;     // bit-mask of used general registers
+  Elf_Word ri_pad;         // unused padding field
+  Elf_Word ri_cprmask[4];  // bit-mask of used co-processor registers
+  Elf_Addr ri_gp_value;    // gp register value
+};
+
+// .MIPS.options section
+template <class ELFT> struct Elf_Mips_Options {
+  LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
+  uint8_t kind;     // Determines interpretation of variable part of descriptor
+  uint8_t size;     // Byte size of descriptor, including this header
+  Elf_Half section; // Section header index of section affected,
+                    // or 0 for global options
+  Elf_Word info;    // Kind-specific information
+
+  const Elf_Mips_RegInfo<ELFT> &getRegInfo() const {
+    assert(kind == llvm::ELF::ODK_REGINFO);
+    return *reinterpret_cast<const Elf_Mips_RegInfo<ELFT> *>(
+               (const uint8_t *)this + sizeof(Elf_Mips_Options));
+  }
+};
+
+// .MIPS.abiflags section content
+template <class ELFT> struct Elf_Mips_ABIFlags {
+  LLVM_ELF_IMPORT_TYPES_ELFT(ELFT)
+  Elf_Half version;  // Version of the structure
+  uint8_t isa_level; // ISA level: 1-5, 32, and 64
+  uint8_t isa_rev;   // ISA revision (0 for MIPS I - MIPS V)
+  uint8_t gpr_size;  // General purpose registers size
+  uint8_t cpr1_size; // Co-processor 1 registers size
+  uint8_t cpr2_size; // Co-processor 2 registers size
+  uint8_t fp_abi;    // Floating-point ABI flag
+  Elf_Word isa_ext;  // Processor-specific extension
+  Elf_Word ases;     // ASEs flags
+  Elf_Word flags1;   // General flags
+  Elf_Word flags2;   // General flags
+};
+
 } // end namespace object.
 } // end namespace llvm.
 
diff --git a/include/llvm/Object/ELFYAML.h b/include/llvm/Object/ELFYAML.h
index b71946d..b455079 100644
--- a/include/llvm/Object/ELFYAML.h
+++ b/include/llvm/Object/ELFYAML.h
@@ -41,12 +41,20 @@ LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_ELFOSABI)
 LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_EF)
 LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_SHT)
 LLVM_YAML_STRONG_TYPEDEF(uint32_t, ELF_REL)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_RSS)
 // Just use 64, since it can hold 32-bit values too.
 LLVM_YAML_STRONG_TYPEDEF(uint64_t, ELF_SHF)
 LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_STT)
 LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_STV)
 LLVM_YAML_STRONG_TYPEDEF(uint8_t, ELF_STO)
 
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, MIPS_AFL_REG)
+LLVM_YAML_STRONG_TYPEDEF(uint8_t, MIPS_ABI_FP)
+LLVM_YAML_STRONG_TYPEDEF(uint32_t, MIPS_AFL_EXT)
+LLVM_YAML_STRONG_TYPEDEF(uint32_t, MIPS_AFL_ASE)
+LLVM_YAML_STRONG_TYPEDEF(uint32_t, MIPS_AFL_FLAGS1)
+LLVM_YAML_STRONG_TYPEDEF(uint32_t, MIPS_ISA)
+
 // For now, hardcode 64 bits everywhere that 32 or 64 would be needed
 // since 64-bit can hold 32-bit values too.
 struct FileHeader {
@@ -71,14 +79,20 @@ struct LocalGlobalWeakSymbols {
   std::vector<Symbol> Global;
   std::vector<Symbol> Weak;
 };
+
+struct SectionOrType {
+  StringRef sectionNameOrType;
+};
+
 struct Section {
-  enum class SectionKind { RawContent, Relocation };
+  enum class SectionKind { Group, RawContent, Relocation, MipsABIFlags };
   SectionKind Kind;
   StringRef Name;
   ELF_SHT Type;
   ELF_SHF Flags;
   llvm::yaml::Hex64 Address;
   StringRef Link;
+  StringRef Info;
   llvm::yaml::Hex64 AddressAlign;
   Section(SectionKind Kind) : Kind(Kind) {}
   virtual ~Section();
@@ -91,6 +105,17 @@ struct RawContentSection : Section {
     return S->Kind == SectionKind::RawContent;
   }
 };
+
+struct Group : Section {
+  // Members of a group contain a flag and a list of section indices
+  // that are part of the group.
+  std::vector<SectionOrType> Members;
+  Group() : Section(SectionKind::Group) {}
+  static bool classof(const Section *S) {
+    return S->Kind == SectionKind::Group;
+  }
+};
+
 struct Relocation {
   llvm::yaml::Hex64 Offset;
   int64_t Addend;
@@ -98,13 +123,32 @@ struct Relocation {
   StringRef Symbol;
 };
 struct RelocationSection : Section {
-  StringRef Info;
   std::vector<Relocation> Relocations;
   RelocationSection() : Section(SectionKind::Relocation) {}
   static bool classof(const Section *S) {
     return S->Kind == SectionKind::Relocation;
   }
 };
+
+// Represents .MIPS.abiflags section
+struct MipsABIFlags : Section {
+  llvm::yaml::Hex16 Version;
+  MIPS_ISA ISALevel;
+  llvm::yaml::Hex8 ISARevision;
+  MIPS_AFL_REG GPRSize;
+  MIPS_AFL_REG CPR1Size;
+  MIPS_AFL_REG CPR2Size;
+  MIPS_ABI_FP FpABI;
+  MIPS_AFL_EXT ISAExtension;
+  MIPS_AFL_ASE ASEs;
+  MIPS_AFL_FLAGS1 Flags1;
+  llvm::yaml::Hex32 Flags2;
+  MipsABIFlags() : Section(SectionKind::MipsABIFlags) {}
+  static bool classof(const Section *S) {
+    return S->Kind == SectionKind::MipsABIFlags;
+  }
+};
+
 struct Object {
   FileHeader Header;
   std::vector<std::unique_ptr<Section>> Sections;
@@ -121,6 +165,7 @@ struct Object {
 LLVM_YAML_IS_SEQUENCE_VECTOR(std::unique_ptr<llvm::ELFYAML::Section>)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Symbol)
 LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::Relocation)
+LLVM_YAML_IS_SEQUENCE_VECTOR(llvm::ELFYAML::SectionOrType)
 
 namespace llvm {
 namespace yaml {
@@ -186,6 +231,41 @@ struct ScalarEnumerationTraits<ELFYAML::ELF_REL> {
 };
 
 template <>
+struct ScalarEnumerationTraits<ELFYAML::ELF_RSS> {
+  static void enumeration(IO &IO, ELFYAML::ELF_RSS &Value);
+};
+
+template <>
+struct ScalarEnumerationTraits<ELFYAML::MIPS_AFL_REG> {
+  static void enumeration(IO &IO, ELFYAML::MIPS_AFL_REG &Value);
+};
+
+template <>
+struct ScalarEnumerationTraits<ELFYAML::MIPS_ABI_FP> {
+  static void enumeration(IO &IO, ELFYAML::MIPS_ABI_FP &Value);
+};
+
+template <>
+struct ScalarEnumerationTraits<ELFYAML::MIPS_AFL_EXT> {
+  static void enumeration(IO &IO, ELFYAML::MIPS_AFL_EXT &Value);
+};
+
+template <>
+struct ScalarEnumerationTraits<ELFYAML::MIPS_ISA> {
+  static void enumeration(IO &IO, ELFYAML::MIPS_ISA &Value);
+};
+
+template <>
+struct ScalarBitSetTraits<ELFYAML::MIPS_AFL_ASE> {
+  static void bitset(IO &IO, ELFYAML::MIPS_AFL_ASE &Value);
+};
+
+template <>
+struct ScalarBitSetTraits<ELFYAML::MIPS_AFL_FLAGS1> {
+  static void bitset(IO &IO, ELFYAML::MIPS_AFL_FLAGS1 &Value);
+};
+
+template <>
 struct MappingTraits<ELFYAML::FileHeader> {
   static void mapping(IO &IO, ELFYAML::FileHeader &FileHdr);
 };
@@ -215,6 +295,10 @@ struct MappingTraits<ELFYAML::Object> {
   static void mapping(IO &IO, ELFYAML::Object &Object);
 };
 
+template <> struct MappingTraits<ELFYAML::SectionOrType> {
+  static void mapping(IO &IO, ELFYAML::SectionOrType &sectionOrType);
+};
+
 } // end namespace yaml
 } // end namespace llvm
 
diff --git a/include/llvm/Object/IRObjectFile.h b/include/llvm/Object/IRObjectFile.h
index 74f4666..ef65528 100644
--- a/include/llvm/Object/IRObjectFile.h
+++ b/include/llvm/Object/IRObjectFile.h
@@ -31,7 +31,7 @@ class IRObjectFile : public SymbolicFile {
 
 public:
   IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> M);
-  ~IRObjectFile();
+  ~IRObjectFile() override;
   void moveSymbolNext(DataRefImpl &Symb) const override;
   std::error_code printSymbolName(raw_ostream &OS,
                                   DataRefImpl Symb) const override;
diff --git a/include/llvm/Object/MachO.h b/include/llvm/Object/MachO.h
index bee1f6c..0a9b62c 100644
--- a/include/llvm/Object/MachO.h
+++ b/include/llvm/Object/MachO.h
@@ -235,6 +235,7 @@ public:
   std::error_code getRelocationOffset(DataRefImpl Rel,
                                       uint64_t &Res) const override;
   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
+  section_iterator getRelocationSection(DataRefImpl Rel) const override;
   std::error_code getRelocationType(DataRefImpl Rel,
                                     uint64_t &Res) const override;
   std::error_code
@@ -326,7 +327,7 @@ public:
   unsigned getAnyRelocationPCRel(const MachO::any_relocation_info &RE) const;
   unsigned getAnyRelocationLength(const MachO::any_relocation_info &RE) const;
   unsigned getAnyRelocationType(const MachO::any_relocation_info &RE) const;
-  SectionRef getRelocationSection(const MachO::any_relocation_info &RE) const;
+  SectionRef getAnyRelocationSection(const MachO::any_relocation_info &RE) const;
 
   // Walk load commands.
   LoadCommandInfo getFirstLoadCommandInfo() const;
@@ -395,6 +396,7 @@ public:
   MachO::symtab_command getSymtabLoadCommand() const;
   MachO::dysymtab_command getDysymtabLoadCommand() const;
   MachO::linkedit_data_command getDataInCodeLoadCommand() const;
+  MachO::linkedit_data_command getLinkOptHintsLoadCommand() const;
   ArrayRef<uint8_t> getDyldInfoRebaseOpcodes() const;
   ArrayRef<uint8_t> getDyldInfoBindOpcodes() const;
   ArrayRef<uint8_t> getDyldInfoWeakBindOpcodes() const;
@@ -437,6 +439,7 @@ private:
   const char *SymtabLoadCmd;
   const char *DysymtabLoadCmd;
   const char *DataInCodeLoadCmd;
+  const char *LinkOptHintsLoadCmd;
   const char *DyldInfoLoadCmd;
   const char *UuidLoadCmd;
   bool HasPageZeroSegment;
diff --git a/include/llvm/Object/MachOUniversal.h b/include/llvm/Object/MachOUniversal.h
index 93f6654..05119b2 100644
--- a/include/llvm/Object/MachOUniversal.h
+++ b/include/llvm/Object/MachOUniversal.h
@@ -16,6 +16,7 @@
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/ADT/iterator_range.h"
 #include "llvm/Object/Archive.h"
 #include "llvm/Object/Binary.h"
 #include "llvm/Object/MachO.h"
@@ -69,9 +70,8 @@ public:
     ObjectForArch Obj;
   public:
     object_iterator(const ObjectForArch &Obj) : Obj(Obj) {}
-    const ObjectForArch* operator->() const {
-      return &Obj;
-    }
+    const ObjectForArch *operator->() const { return &Obj; }
+    const ObjectForArch &operator*() const { return Obj; }
 
     bool operator==(const object_iterator &Other) const {
       return Obj == Other.Obj;
@@ -97,6 +97,10 @@ public:
     return ObjectForArch(nullptr, 0);
   }
 
+  iterator_range<object_iterator> objects() const {
+    return make_range(begin_objects(), end_objects());
+  }
+
   uint32_t getNumberOfObjects() const { return NumberOfObjects; }
 
   // Cast methods.
diff --git a/include/llvm/Object/ObjectFile.h b/include/llvm/Object/ObjectFile.h
index 6aa985d..14cd082 100644
--- a/include/llvm/Object/ObjectFile.h
+++ b/include/llvm/Object/ObjectFile.h
@@ -32,6 +32,8 @@ class MachOObjectFile;
 
 class SymbolRef;
 class symbol_iterator;
+class SectionRef;
+typedef content_iterator<SectionRef> section_iterator;
 
 /// RelocationRef - This is a value type class that represents a single
 /// relocation in the list of relocations in the object file.
@@ -51,6 +53,7 @@ public:
   std::error_code getAddress(uint64_t &Result) const;
   std::error_code getOffset(uint64_t &Result) const;
   symbol_iterator getSymbol() const;
+  section_iterator getSection() const;
   std::error_code getType(uint64_t &Result) const;
 
   /// @brief Indicates whether this relocation should hidden when listing
@@ -76,8 +79,6 @@ typedef content_iterator<RelocationRef> relocation_iterator;
 
 /// SectionRef - This is a value type class that represents a single section in
 /// the list of sections in the object file.
-class SectionRef;
-typedef content_iterator<SectionRef> section_iterator;
 class SectionRef {
   friend class SymbolRef;
   DataRefImpl SectionPimpl;
@@ -180,8 +181,8 @@ public:
 /// figures out which type to create.
 class ObjectFile : public SymbolicFile {
   virtual void anchor();
-  ObjectFile() LLVM_DELETED_FUNCTION;
-  ObjectFile(const ObjectFile &other) LLVM_DELETED_FUNCTION;
+  ObjectFile() = delete;
+  ObjectFile(const ObjectFile &other) = delete;
 
 protected:
   ObjectFile(unsigned int Type, MemoryBufferRef Source);
@@ -247,6 +248,7 @@ protected:
   virtual std::error_code getRelocationOffset(DataRefImpl Rel,
                                               uint64_t &Res) const = 0;
   virtual symbol_iterator getRelocationSymbol(DataRefImpl Rel) const = 0;
+  virtual section_iterator getRelocationSection(DataRefImpl Rel) const = 0;
   virtual std::error_code getRelocationType(DataRefImpl Rel,
                                             uint64_t &Res) const = 0;
   virtual std::error_code
@@ -467,6 +469,10 @@ inline symbol_iterator RelocationRef::getSymbol() const {
   return OwningObject->getRelocationSymbol(RelocationPimpl);
 }
 
+inline section_iterator RelocationRef::getSection() const {
+  return OwningObject->getRelocationSection(RelocationPimpl);
+}
+
 inline std::error_code RelocationRef::getType(uint64_t &Result) const {
   return OwningObject->getRelocationType(RelocationPimpl, Result);
 }
diff --git a/include/llvm/Object/SymbolicFile.h b/include/llvm/Object/SymbolicFile.h
index 435799a..2bfff4c 100644
--- a/include/llvm/Object/SymbolicFile.h
+++ b/include/llvm/Object/SymbolicFile.h
@@ -45,7 +45,9 @@ inline bool operator<(const DataRefImpl &a, const DataRefImpl &b) {
   return std::memcmp(&a, &b, sizeof(DataRefImpl)) < 0;
 }
 
-template <class content_type> class content_iterator {
+template <class content_type>
+class content_iterator
+    : public std::iterator<std::forward_iterator_tag, content_type> {
   content_type Current;
 
 public:
@@ -87,9 +89,11 @@ public:
     SF_Absolute = 1U << 3,       // Absolute symbol
     SF_Common = 1U << 4,         // Symbol has common linkage
     SF_Indirect = 1U << 5,       // Symbol is an alias to another symbol
-    SF_FormatSpecific = 1U << 6, // Specific to the object file format
+    SF_Exported = 1U << 6,       // Symbol is visible to other DSOs
+    SF_FormatSpecific = 1U << 7, // Specific to the object file format
                                  // (e.g. section symbols)
-    SF_Thumb = 1U << 7           // Thumb symbol in a 32-bit ARM binary
+    SF_Thumb = 1U << 8,          // Thumb symbol in a 32-bit ARM binary
+    SF_Hidden = 1U << 9,         // Symbol has hidden visibility
   };
 
   BasicSymbolRef() : OwningObject(nullptr) { }
@@ -115,7 +119,7 @@ const uint64_t UnknownAddressOrSize = ~0ULL;
 
 class SymbolicFile : public Binary {
 public:
-  virtual ~SymbolicFile();
+  ~SymbolicFile() override;
   SymbolicFile(unsigned int Type, MemoryBufferRef Source);
 
   // virtual interface.