Index: head/contrib/llvm/tools/lld/ELF/InputSection.cpp
===================================================================
--- head/contrib/llvm/tools/lld/ELF/InputSection.cpp	(revision 319954)
+++ head/contrib/llvm/tools/lld/ELF/InputSection.cpp	(revision 319955)
@@ -1,802 +1,803 @@
 //===- InputSection.cpp ---------------------------------------------------===//
 //
 //                             The LLVM Linker
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "InputSection.h"
 #include "Config.h"
 #include "EhFrame.h"
 #include "Error.h"
 #include "InputFiles.h"
 #include "LinkerScript.h"
 #include "Memory.h"
 #include "OutputSections.h"
 #include "Relocations.h"
 #include "SyntheticSections.h"
 #include "Target.h"
 #include "Thunks.h"
 #include "llvm/Object/Decompressor.h"
 #include "llvm/Support/Compression.h"
 #include "llvm/Support/Endian.h"
 #include <mutex>
 
 using namespace llvm;
 using namespace llvm::ELF;
 using namespace llvm::object;
 using namespace llvm::support;
 using namespace llvm::support::endian;
 
 using namespace lld;
 using namespace lld::elf;
 
 // Returns a string to construct an error message.
 template <class ELFT>
 std::string lld::toString(const InputSectionBase<ELFT> *Sec) {
   // File can be absent if section is synthetic.
   std::string FileName =
       Sec->getFile() ? Sec->getFile()->getName() : "<internal>";
   return (FileName + ":(" + Sec->Name + ")").str();
 }
 
 template <class ELFT>
 static ArrayRef<uint8_t> getSectionContents(elf::ObjectFile<ELFT> *File,
                                             const typename ELFT::Shdr *Hdr) {
   if (!File || Hdr->sh_type == SHT_NOBITS)
     return makeArrayRef<uint8_t>(nullptr, Hdr->sh_size);
   return check(File->getObj().getSectionContents(Hdr));
 }
 
 template <class ELFT>
 InputSectionBase<ELFT>::InputSectionBase(elf::ObjectFile<ELFT> *File,
                                          uintX_t Flags, uint32_t Type,
                                          uintX_t Entsize, uint32_t Link,
                                          uint32_t Info, uintX_t Addralign,
                                          ArrayRef<uint8_t> Data, StringRef Name,
                                          Kind SectionKind)
     : InputSectionData(SectionKind, Name, Data,
                        !Config->GcSections || !(Flags & SHF_ALLOC)),
       File(File), Flags(Flags), Entsize(Entsize), Type(Type), Link(Link),
       Info(Info), Repl(this) {
   NumRelocations = 0;
   AreRelocsRela = false;
 
   // The ELF spec states that a value of 0 means the section has
   // no alignment constraits.
   uint64_t V = std::max<uint64_t>(Addralign, 1);
   if (!isPowerOf2_64(V))
     fatal(toString(File) + ": section sh_addralign is not a power of 2");
 
   // We reject object files having insanely large alignments even though
   // they are allowed by the spec. I think 4GB is a reasonable limitation.
   // We might want to relax this in the future.
   if (V > UINT32_MAX)
     fatal(toString(File) + ": section sh_addralign is too large");
   Alignment = V;
 
   // If it is not a mergeable section, overwrite the flag so that the flag
   // is consistent with the class. This inconsistency could occur when
   // string merging is disabled using -O0 flag.
   if (!Config->Relocatable && !isa<MergeInputSection<ELFT>>(this))
     this->Flags &= ~(SHF_MERGE | SHF_STRINGS);
 }
 
 template <class ELFT>
 InputSectionBase<ELFT>::InputSectionBase(elf::ObjectFile<ELFT> *File,
                                          const Elf_Shdr *Hdr, StringRef Name,
                                          Kind SectionKind)
     : InputSectionBase(File, Hdr->sh_flags & ~SHF_INFO_LINK, Hdr->sh_type,
                        Hdr->sh_entsize, Hdr->sh_link, Hdr->sh_info,
                        Hdr->sh_addralign, getSectionContents(File, Hdr), Name,
                        SectionKind) {
   this->Offset = Hdr->sh_offset;
 }
 
 template <class ELFT> size_t InputSectionBase<ELFT>::getSize() const {
   if (auto *S = dyn_cast<SyntheticSection<ELFT>>(this))
     return S->getSize();
 
   if (auto *D = dyn_cast<InputSection<ELFT>>(this))
     if (D->getThunksSize() > 0)
       return D->getThunkOff() + D->getThunksSize();
 
   return Data.size();
 }
 
 template <class ELFT>
 typename ELFT::uint InputSectionBase<ELFT>::getOffset(uintX_t Offset) const {
   switch (kind()) {
   case Regular:
     return cast<InputSection<ELFT>>(this)->OutSecOff + Offset;
   case Synthetic:
     // For synthetic sections we treat offset -1 as the end of the section.
     // The same approach is used for synthetic symbols (DefinedSynthetic).
     return cast<InputSection<ELFT>>(this)->OutSecOff +
            (Offset == uintX_t(-1) ? getSize() : Offset);
   case EHFrame:
     // The file crtbeginT.o has relocations pointing to the start of an empty
     // .eh_frame that is known to be the first in the link. It does that to
     // identify the start of the output .eh_frame.
     return Offset;
   case Merge:
     return cast<MergeInputSection<ELFT>>(this)->getOffset(Offset);
   }
   llvm_unreachable("invalid section kind");
 }
 
 // Uncompress section contents. Note that this function is called
 // from parallel_for_each, so it must be thread-safe.
 template <class ELFT> void InputSectionBase<ELFT>::uncompress() {
   Decompressor Decompressor = check(Decompressor::create(
       Name, toStringRef(Data), ELFT::TargetEndianness == llvm::support::little,
       ELFT::Is64Bits));
 
   size_t Size = Decompressor.getDecompressedSize();
   char *OutputBuf;
   {
     static std::mutex Mu;
     std::lock_guard<std::mutex> Lock(Mu);
     OutputBuf = BAlloc.Allocate<char>(Size);
   }
 
   if (Error E = Decompressor.decompress({OutputBuf, Size}))
     fatal(E, toString(this));
   Data = ArrayRef<uint8_t>((uint8_t *)OutputBuf, Size);
 }
 
 template <class ELFT>
 typename ELFT::uint
 InputSectionBase<ELFT>::getOffset(const DefinedRegular<ELFT> &Sym) const {
   return getOffset(Sym.Value);
 }
 
 template <class ELFT>
 InputSectionBase<ELFT> *InputSectionBase<ELFT>::getLinkOrderDep() const {
   if ((Flags & SHF_LINK_ORDER) && Link != 0)
     return getFile()->getSections()[Link];
   return nullptr;
 }
 
 // Returns a source location string. Used to construct an error message.
 template <class ELFT>
 std::string InputSectionBase<ELFT>::getLocation(typename ELFT::uint Offset) {
   // First check if we can get desired values from debugging information.
   std::string LineInfo = File->getLineInfo(this, Offset);
   if (!LineInfo.empty())
     return LineInfo;
 
   // File->SourceFile contains STT_FILE symbol that contains a
   // source file name. If it's missing, we use an object file name.
   std::string SrcFile = File->SourceFile;
   if (SrcFile.empty())
     SrcFile = toString(File);
 
   // Find a function symbol that encloses a given location.
   for (SymbolBody *B : File->getSymbols())
     if (auto *D = dyn_cast<DefinedRegular<ELFT>>(B))
       if (D->Section == this && D->Type == STT_FUNC)
         if (D->Value <= Offset && Offset < D->Value + D->Size)
           return SrcFile + ":(function " + toString(*D) + ")";
 
   // If there's no symbol, print out the offset in the section.
   return (SrcFile + ":(" + Name + "+0x" + utohexstr(Offset) + ")").str();
 }
 
 template <class ELFT>
 InputSection<ELFT>::InputSection() : InputSectionBase<ELFT>() {}
 
 template <class ELFT>
 InputSection<ELFT>::InputSection(uintX_t Flags, uint32_t Type,
                                  uintX_t Addralign, ArrayRef<uint8_t> Data,
                                  StringRef Name, Kind K)
     : InputSectionBase<ELFT>(nullptr, Flags, Type,
                              /*Entsize*/ 0, /*Link*/ 0, /*Info*/ 0, Addralign,
                              Data, Name, K) {}
 
 template <class ELFT>
 InputSection<ELFT>::InputSection(elf::ObjectFile<ELFT> *F,
                                  const Elf_Shdr *Header, StringRef Name)
     : InputSectionBase<ELFT>(F, Header, Name, Base::Regular) {}
 
 template <class ELFT>
 bool InputSection<ELFT>::classof(const InputSectionData *S) {
   return S->kind() == Base::Regular || S->kind() == Base::Synthetic;
 }
 
 template <class ELFT>
 InputSectionBase<ELFT> *InputSection<ELFT>::getRelocatedSection() {
   assert(this->Type == SHT_RELA || this->Type == SHT_REL);
   ArrayRef<InputSectionBase<ELFT> *> Sections = this->File->getSections();
   return Sections[this->Info];
 }
 
 template <class ELFT> void InputSection<ELFT>::addThunk(const Thunk<ELFT> *T) {
   Thunks.push_back(T);
 }
 
 template <class ELFT> uint64_t InputSection<ELFT>::getThunkOff() const {
   return this->Data.size();
 }
 
 template <class ELFT> uint64_t InputSection<ELFT>::getThunksSize() const {
   uint64_t Total = 0;
   for (const Thunk<ELFT> *T : Thunks)
     Total += T->size();
   return Total;
 }
 
 // This is used for -r. We can't use memcpy to copy relocations because we need
 // to update symbol table offset and section index for each relocation. So we
 // copy relocations one by one.
 template <class ELFT>
 template <class RelTy>
 void InputSection<ELFT>::copyRelocations(uint8_t *Buf, ArrayRef<RelTy> Rels) {
   InputSectionBase<ELFT> *RelocatedSection = getRelocatedSection();
 
   for (const RelTy &Rel : Rels) {
     uint32_t Type = Rel.getType(Config->Mips64EL);
     SymbolBody &Body = this->File->getRelocTargetSym(Rel);
 
     Elf_Rela *P = reinterpret_cast<Elf_Rela *>(Buf);
     Buf += sizeof(RelTy);
 
     if (Config->Rela)
       P->r_addend = getAddend<ELFT>(Rel);
     P->r_offset = RelocatedSection->getOffset(Rel.r_offset);
     P->setSymbolAndType(In<ELFT>::SymTab->getSymbolIndex(&Body), Type,
                         Config->Mips64EL);
   }
 }
 
 static uint32_t getARMUndefinedRelativeWeakVA(uint32_t Type, uint32_t A,
                                               uint32_t P) {
   switch (Type) {
   case R_ARM_THM_JUMP11:
     return P + 2;
   case R_ARM_CALL:
   case R_ARM_JUMP24:
   case R_ARM_PC24:
   case R_ARM_PLT32:
   case R_ARM_PREL31:
   case R_ARM_THM_JUMP19:
   case R_ARM_THM_JUMP24:
     return P + 4;
   case R_ARM_THM_CALL:
     // We don't want an interworking BLX to ARM
     return P + 5;
   default:
     return A;
   }
 }
 
 static uint64_t getAArch64UndefinedRelativeWeakVA(uint64_t Type, uint64_t A,
                                                   uint64_t P) {
   switch (Type) {
   case R_AARCH64_CALL26:
   case R_AARCH64_CONDBR19:
   case R_AARCH64_JUMP26:
   case R_AARCH64_TSTBR14:
     return P + 4;
   default:
     return A;
   }
 }
 
 template <class ELFT>
 static typename ELFT::uint
 getRelocTargetVA(uint32_t Type, typename ELFT::uint A, typename ELFT::uint P,
                  const SymbolBody &Body, RelExpr Expr) {
   switch (Expr) {
-  case R_HINT:
-  case R_TLSDESC_CALL:
-    llvm_unreachable("cannot relocate hint relocs");
-  case R_TLSLD:
-    return In<ELFT>::Got->getTlsIndexOff() + A - In<ELFT>::Got->getSize();
-  case R_TLSLD_PC:
-    return In<ELFT>::Got->getTlsIndexVA() + A - P;
-  case R_THUNK_ABS:
-    return Body.getThunkVA<ELFT>() + A;
-  case R_THUNK_PC:
-  case R_THUNK_PLT_PC:
-    return Body.getThunkVA<ELFT>() + A - P;
-  case R_PPC_TOC:
-    return getPPC64TocBase() + A;
-  case R_TLSGD:
-    return In<ELFT>::Got->getGlobalDynOffset(Body) + A -
-           In<ELFT>::Got->getSize();
-  case R_TLSGD_PC:
-    return In<ELFT>::Got->getGlobalDynAddr(Body) + A - P;
-  case R_TLSDESC:
-    return In<ELFT>::Got->getGlobalDynAddr(Body) + A;
-  case R_TLSDESC_PAGE:
-    return getAArch64Page(In<ELFT>::Got->getGlobalDynAddr(Body) + A) -
-           getAArch64Page(P);
-  case R_PLT:
-    return Body.getPltVA<ELFT>() + A;
-  case R_PLT_PC:
-  case R_PPC_PLT_OPD:
-    return Body.getPltVA<ELFT>() + A - P;
-  case R_SIZE:
-    return Body.getSize<ELFT>() + A;
+  case R_ABS:
+  case R_RELAX_GOT_PC_NOPIC:
+    return Body.getVA<ELFT>(A);
+  case R_GOT:
+  case R_RELAX_TLS_GD_TO_IE_ABS:
+    return Body.getGotVA<ELFT>() + A;
+  case R_GOTONLY_PC:
+    return In<ELFT>::Got->getVA() + A - P;
+  case R_GOTONLY_PC_FROM_END:
+    return In<ELFT>::Got->getVA() + A - P + In<ELFT>::Got->getSize();
   case R_GOTREL:
     return Body.getVA<ELFT>(A) - In<ELFT>::Got->getVA();
   case R_GOTREL_FROM_END:
     return Body.getVA<ELFT>(A) - In<ELFT>::Got->getVA() -
            In<ELFT>::Got->getSize();
-  case R_RELAX_TLS_GD_TO_IE_END:
   case R_GOT_FROM_END:
+  case R_RELAX_TLS_GD_TO_IE_END:
     return Body.getGotOffset<ELFT>() + A - In<ELFT>::Got->getSize();
-  case R_RELAX_TLS_GD_TO_IE_ABS:
-  case R_GOT:
-    return Body.getGotVA<ELFT>() + A;
-  case R_RELAX_TLS_GD_TO_IE_PAGE_PC:
+  case R_GOT_OFF:
+    return Body.getGotOffset<ELFT>() + A;
   case R_GOT_PAGE_PC:
+  case R_RELAX_TLS_GD_TO_IE_PAGE_PC:
     return getAArch64Page(Body.getGotVA<ELFT>() + A) - getAArch64Page(P);
-  case R_RELAX_TLS_GD_TO_IE:
   case R_GOT_PC:
+  case R_RELAX_TLS_GD_TO_IE:
     return Body.getGotVA<ELFT>() + A - P;
-  case R_GOTONLY_PC:
-    return In<ELFT>::Got->getVA() + A - P;
-  case R_GOTONLY_PC_FROM_END:
-    return In<ELFT>::Got->getVA() + A - P + In<ELFT>::Got->getSize();
-  case R_RELAX_TLS_LD_TO_LE:
-  case R_RELAX_TLS_IE_TO_LE:
-  case R_RELAX_TLS_GD_TO_LE:
-  case R_TLS:
-    // A weak undefined TLS symbol resolves to the base of the TLS
-    // block, i.e. gets a value of zero. If we pass --gc-sections to
-    // lld and .tbss is not referenced, it gets reclaimed and we don't
-    // create a TLS program header. Therefore, we resolve this
-    // statically to zero.
-    if (Body.isTls() && (Body.isLazy() || Body.isUndefined()) &&
-        Body.symbol()->isWeak())
-      return 0;
-    if (Target->TcbSize)
-      return Body.getVA<ELFT>(A) +
-             alignTo(Target->TcbSize, Out<ELFT>::TlsPhdr->p_align);
-    return Body.getVA<ELFT>(A) - Out<ELFT>::TlsPhdr->p_memsz;
-  case R_RELAX_TLS_GD_TO_LE_NEG:
-  case R_NEG_TLS:
-    return Out<ELF32LE>::TlsPhdr->p_memsz - Body.getVA<ELFT>(A);
-  case R_ABS:
-  case R_RELAX_GOT_PC_NOPIC:
-    return Body.getVA<ELFT>(A);
-  case R_GOT_OFF:
-    return Body.getGotOffset<ELFT>() + A;
+  case R_HINT:
+  case R_TLSDESC_CALL:
+    llvm_unreachable("cannot relocate hint relocs");
+  case R_MIPS_GOTREL:
+    return Body.getVA<ELFT>(A) - In<ELFT>::MipsGot->getGp();
   case R_MIPS_GOT_LOCAL_PAGE:
     // If relocation against MIPS local symbol requires GOT entry, this entry
     // should be initialized by 'page address'. This address is high 16-bits
     // of sum the symbol's value and the addend.
     return In<ELFT>::MipsGot->getVA() +
            In<ELFT>::MipsGot->getPageEntryOffset(Body, A) -
            In<ELFT>::MipsGot->getGp();
   case R_MIPS_GOT_OFF:
   case R_MIPS_GOT_OFF32:
     // In case of MIPS if a GOT relocation has non-zero addend this addend
     // should be applied to the GOT entry content not to the GOT entry offset.
     // That is why we use separate expression type.
     return In<ELFT>::MipsGot->getVA() +
            In<ELFT>::MipsGot->getBodyEntryOffset(Body, A) -
            In<ELFT>::MipsGot->getGp();
-  case R_MIPS_GOTREL:
-    return Body.getVA<ELFT>(A) - In<ELFT>::MipsGot->getGp();
   case R_MIPS_TLSGD:
     return In<ELFT>::MipsGot->getVA() + In<ELFT>::MipsGot->getTlsOffset() +
            In<ELFT>::MipsGot->getGlobalDynOffset(Body) -
            In<ELFT>::MipsGot->getGp();
   case R_MIPS_TLSLD:
     return In<ELFT>::MipsGot->getVA() + In<ELFT>::MipsGot->getTlsOffset() +
            In<ELFT>::MipsGot->getTlsIndexOff() - In<ELFT>::MipsGot->getGp();
+  case R_PAGE_PC:
+  case R_PLT_PAGE_PC:
+    if (Body.isUndefined() && !Body.isLocal() && Body.symbol()->isWeak())
+      return getAArch64Page(A);
+    return getAArch64Page(Body.getVA<ELFT>(A)) - getAArch64Page(P);
+  case R_PC:
+    if (Body.isUndefined() && !Body.isLocal() && Body.symbol()->isWeak()) {
+      // On ARM and AArch64 a branch to an undefined weak resolves to the
+      // next instruction, otherwise the place.
+      if (Config->EMachine == EM_ARM)
+        return getARMUndefinedRelativeWeakVA(Type, A, P);
+      if (Config->EMachine == EM_AARCH64)
+        return getAArch64UndefinedRelativeWeakVA(Type, A, P);
+    }
+    return Body.getVA<ELFT>(A) - P;
+  case R_PLT:
+    return Body.getPltVA<ELFT>() + A;
+  case R_PLT_PC:
+  case R_PPC_PLT_OPD:
+    return Body.getPltVA<ELFT>() + A - P;
   case R_PPC_OPD: {
     uint64_t SymVA = Body.getVA<ELFT>(A);
     // If we have an undefined weak symbol, we might get here with a symbol
     // address of zero. That could overflow, but the code must be unreachable,
     // so don't bother doing anything at all.
     if (!SymVA)
       return 0;
     if (Out<ELF64BE>::Opd) {
       // If this is a local call, and we currently have the address of a
       // function-descriptor, get the underlying code address instead.
       uint64_t OpdStart = Out<ELF64BE>::Opd->Addr;
       uint64_t OpdEnd = OpdStart + Out<ELF64BE>::Opd->Size;
       bool InOpd = OpdStart <= SymVA && SymVA < OpdEnd;
       if (InOpd)
         SymVA = read64be(&Out<ELF64BE>::OpdBuf[SymVA - OpdStart]);
     }
     return SymVA - P;
   }
-  case R_PC:
-    if (Body.isUndefined() && !Body.isLocal() && Body.symbol()->isWeak()) {
-      // On ARM and AArch64 a branch to an undefined weak resolves to the
-      // next instruction, otherwise the place.
-      if (Config->EMachine == EM_ARM)
-        return getARMUndefinedRelativeWeakVA(Type, A, P);
-      if (Config->EMachine == EM_AARCH64)
-        return getAArch64UndefinedRelativeWeakVA(Type, A, P);
-    }
+  case R_PPC_TOC:
+    return getPPC64TocBase() + A;
   case R_RELAX_GOT_PC:
     return Body.getVA<ELFT>(A) - P;
-  case R_PLT_PAGE_PC:
-  case R_PAGE_PC:
-    if (Body.isUndefined() && !Body.isLocal() && Body.symbol()->isWeak())
-      return getAArch64Page(A);
-    return getAArch64Page(Body.getVA<ELFT>(A)) - getAArch64Page(P);
+  case R_RELAX_TLS_GD_TO_LE:
+  case R_RELAX_TLS_IE_TO_LE:
+  case R_RELAX_TLS_LD_TO_LE:
+  case R_TLS:
+    // A weak undefined TLS symbol resolves to the base of the TLS
+    // block, i.e. gets a value of zero. If we pass --gc-sections to
+    // lld and .tbss is not referenced, it gets reclaimed and we don't
+    // create a TLS program header. Therefore, we resolve this
+    // statically to zero.
+    if (Body.isTls() && (Body.isLazy() || Body.isUndefined()) &&
+        Body.symbol()->isWeak())
+      return 0;
+    if (Target->TcbSize)
+      return Body.getVA<ELFT>(A) +
+             alignTo(Target->TcbSize, Out<ELFT>::TlsPhdr->p_align);
+    return Body.getVA<ELFT>(A) - Out<ELFT>::TlsPhdr->p_memsz;
+  case R_RELAX_TLS_GD_TO_LE_NEG:
+  case R_NEG_TLS:
+    return Out<ELF32LE>::TlsPhdr->p_memsz - Body.getVA<ELFT>(A);
+  case R_SIZE:
+    return Body.getSize<ELFT>() + A;
+  case R_THUNK_ABS:
+    return Body.getThunkVA<ELFT>() + A;
+  case R_THUNK_PC:
+  case R_THUNK_PLT_PC:
+    return Body.getThunkVA<ELFT>() + A - P;
+  case R_TLSDESC:
+    return In<ELFT>::Got->getGlobalDynAddr(Body) + A;
+  case R_TLSDESC_PAGE:
+    return getAArch64Page(In<ELFT>::Got->getGlobalDynAddr(Body) + A) -
+           getAArch64Page(P);
+  case R_TLSGD:
+    return In<ELFT>::Got->getGlobalDynOffset(Body) + A -
+           In<ELFT>::Got->getSize();
+  case R_TLSGD_PC:
+    return In<ELFT>::Got->getGlobalDynAddr(Body) + A - P;
+  case R_TLSLD:
+    return In<ELFT>::Got->getTlsIndexOff() + A - In<ELFT>::Got->getSize();
+  case R_TLSLD_PC:
+    return In<ELFT>::Got->getTlsIndexVA() + A - P;
   }
   llvm_unreachable("Invalid expression");
 }
 
 // This function applies relocations to sections without SHF_ALLOC bit.
 // Such sections are never mapped to memory at runtime. Debug sections are
 // an example. Relocations in non-alloc sections are much easier to
 // handle than in allocated sections because it will never need complex
 // treatement such as GOT or PLT (because at runtime no one refers them).
 // So, we handle relocations for non-alloc sections directly in this
 // function as a performance optimization.
 template <class ELFT>
 template <class RelTy>
 void InputSection<ELFT>::relocateNonAlloc(uint8_t *Buf, ArrayRef<RelTy> Rels) {
   for (const RelTy &Rel : Rels) {
     uint32_t Type = Rel.getType(Config->Mips64EL);
     uintX_t Offset = this->getOffset(Rel.r_offset);
     uint8_t *BufLoc = Buf + Offset;
     uintX_t Addend = getAddend<ELFT>(Rel);
     if (!RelTy::IsRela)
       Addend += Target->getImplicitAddend(BufLoc, Type);
 
     SymbolBody &Sym = this->File->getRelocTargetSym(Rel);
     if (Target->getRelExpr(Type, Sym) != R_ABS) {
       error(this->getLocation(Offset) + ": has non-ABS reloc");
       return;
     }
 
     uintX_t AddrLoc = this->OutSec->Addr + Offset;
     uint64_t SymVA = 0;
     if (!Sym.isTls() || Out<ELFT>::TlsPhdr)
       SymVA = SignExtend64<sizeof(uintX_t) * 8>(
           getRelocTargetVA<ELFT>(Type, Addend, AddrLoc, Sym, R_ABS));
     Target->relocateOne(BufLoc, Type, SymVA);
   }
 }
 
 template <class ELFT>
 void InputSectionBase<ELFT>::relocate(uint8_t *Buf, uint8_t *BufEnd) {
   // scanReloc function in Writer.cpp constructs Relocations
   // vector only for SHF_ALLOC'ed sections. For other sections,
   // we handle relocations directly here.
   auto *IS = dyn_cast<InputSection<ELFT>>(this);
   if (IS && !(IS->Flags & SHF_ALLOC)) {
     if (IS->AreRelocsRela)
       IS->relocateNonAlloc(Buf, IS->relas());
     else
       IS->relocateNonAlloc(Buf, IS->rels());
     return;
   }
 
   const unsigned Bits = sizeof(uintX_t) * 8;
   for (const Relocation &Rel : Relocations) {
     uintX_t Offset = getOffset(Rel.Offset);
     uint8_t *BufLoc = Buf + Offset;
     uint32_t Type = Rel.Type;
     uintX_t A = Rel.Addend;
 
     uintX_t AddrLoc = OutSec->Addr + Offset;
     RelExpr Expr = Rel.Expr;
     uint64_t TargetVA = SignExtend64<Bits>(
         getRelocTargetVA<ELFT>(Type, A, AddrLoc, *Rel.Sym, Expr));
 
     switch (Expr) {
     case R_RELAX_GOT_PC:
     case R_RELAX_GOT_PC_NOPIC:
       Target->relaxGot(BufLoc, TargetVA);
       break;
     case R_RELAX_TLS_IE_TO_LE:
       Target->relaxTlsIeToLe(BufLoc, Type, TargetVA);
       break;
     case R_RELAX_TLS_LD_TO_LE:
       Target->relaxTlsLdToLe(BufLoc, Type, TargetVA);
       break;
     case R_RELAX_TLS_GD_TO_LE:
     case R_RELAX_TLS_GD_TO_LE_NEG:
       Target->relaxTlsGdToLe(BufLoc, Type, TargetVA);
       break;
     case R_RELAX_TLS_GD_TO_IE:
     case R_RELAX_TLS_GD_TO_IE_ABS:
     case R_RELAX_TLS_GD_TO_IE_PAGE_PC:
     case R_RELAX_TLS_GD_TO_IE_END:
       Target->relaxTlsGdToIe(BufLoc, Type, TargetVA);
       break;
     case R_PPC_PLT_OPD:
       // Patch a nop (0x60000000) to a ld.
       if (BufLoc + 8 <= BufEnd && read32be(BufLoc + 4) == 0x60000000)
         write32be(BufLoc + 4, 0xe8410028); // ld %r2, 40(%r1)
     // fallthrough
     default:
       Target->relocateOne(BufLoc, Type, TargetVA);
       break;
     }
   }
 }
 
 template <class ELFT> void InputSection<ELFT>::writeTo(uint8_t *Buf) {
   if (this->Type == SHT_NOBITS)
     return;
 
   if (auto *S = dyn_cast<SyntheticSection<ELFT>>(this)) {
     S->writeTo(Buf + OutSecOff);
     return;
   }
 
   // If -r is given, then an InputSection may be a relocation section.
   if (this->Type == SHT_RELA) {
     copyRelocations(Buf + OutSecOff, this->template getDataAs<Elf_Rela>());
     return;
   }
   if (this->Type == SHT_REL) {
     copyRelocations(Buf + OutSecOff, this->template getDataAs<Elf_Rel>());
     return;
   }
 
   // Copy section contents from source object file to output file.
   ArrayRef<uint8_t> Data = this->Data;
   memcpy(Buf + OutSecOff, Data.data(), Data.size());
 
   // Iterate over all relocation sections that apply to this section.
   uint8_t *BufEnd = Buf + OutSecOff + Data.size();
   this->relocate(Buf, BufEnd);
 
   // The section might have a data/code generated by the linker and need
   // to be written after the section. Usually these are thunks - small piece
   // of code used to jump between "incompatible" functions like PIC and non-PIC
   // or if the jump target too far and its address does not fit to the short
   // jump istruction.
   if (!Thunks.empty()) {
     Buf += OutSecOff + getThunkOff();
     for (const Thunk<ELFT> *T : Thunks) {
       T->writeTo(Buf);
       Buf += T->size();
     }
   }
 }
 
 template <class ELFT>
 void InputSection<ELFT>::replace(InputSection<ELFT> *Other) {
   this->Alignment = std::max(this->Alignment, Other->Alignment);
   Other->Repl = this->Repl;
   Other->Live = false;
 }
 
 template <class ELFT>
 EhInputSection<ELFT>::EhInputSection(elf::ObjectFile<ELFT> *F,
                                      const Elf_Shdr *Header, StringRef Name)
     : InputSectionBase<ELFT>(F, Header, Name, InputSectionBase<ELFT>::EHFrame) {
   // Mark .eh_frame sections as live by default because there are
   // usually no relocations that point to .eh_frames. Otherwise,
   // the garbage collector would drop all .eh_frame sections.
   this->Live = true;
 }
 
 template <class ELFT>
 bool EhInputSection<ELFT>::classof(const InputSectionData *S) {
   return S->kind() == InputSectionBase<ELFT>::EHFrame;
 }
 
 // Returns the index of the first relocation that points to a region between
 // Begin and Begin+Size.
 template <class IntTy, class RelTy>
 static unsigned getReloc(IntTy Begin, IntTy Size, const ArrayRef<RelTy> &Rels,
                          unsigned &RelocI) {
   // Start search from RelocI for fast access. That works because the
   // relocations are sorted in .eh_frame.
   for (unsigned N = Rels.size(); RelocI < N; ++RelocI) {
     const RelTy &Rel = Rels[RelocI];
     if (Rel.r_offset < Begin)
       continue;
 
     if (Rel.r_offset < Begin + Size)
       return RelocI;
     return -1;
   }
   return -1;
 }
 
 // .eh_frame is a sequence of CIE or FDE records.
 // This function splits an input section into records and returns them.
 template <class ELFT> void EhInputSection<ELFT>::split() {
   // Early exit if already split.
   if (!this->Pieces.empty())
     return;
 
   if (this->NumRelocations) {
     if (this->AreRelocsRela)
       split(this->relas());
     else
       split(this->rels());
     return;
   }
   split(makeArrayRef<typename ELFT::Rela>(nullptr, nullptr));
 }
 
 template <class ELFT>
 template <class RelTy>
 void EhInputSection<ELFT>::split(ArrayRef<RelTy> Rels) {
   ArrayRef<uint8_t> Data = this->Data;
   unsigned RelI = 0;
   for (size_t Off = 0, End = Data.size(); Off != End;) {
     size_t Size = readEhRecordSize<ELFT>(this, Off);
     this->Pieces.emplace_back(Off, this, Size, getReloc(Off, Size, Rels, RelI));
     // The empty record is the end marker.
     if (Size == 4)
       break;
     Off += Size;
   }
 }
 
 static size_t findNull(ArrayRef<uint8_t> A, size_t EntSize) {
   // Optimize the common case.
   StringRef S((const char *)A.data(), A.size());
   if (EntSize == 1)
     return S.find(0);
 
   for (unsigned I = 0, N = S.size(); I != N; I += EntSize) {
     const char *B = S.begin() + I;
     if (std::all_of(B, B + EntSize, [](char C) { return C == 0; }))
       return I;
   }
   return StringRef::npos;
 }
 
 // Split SHF_STRINGS section. Such section is a sequence of
 // null-terminated strings.
 template <class ELFT>
 void MergeInputSection<ELFT>::splitStrings(ArrayRef<uint8_t> Data,
                                            size_t EntSize) {
   size_t Off = 0;
   bool IsAlloc = this->Flags & SHF_ALLOC;
   while (!Data.empty()) {
     size_t End = findNull(Data, EntSize);
     if (End == StringRef::npos)
       fatal(toString(this) + ": string is not null terminated");
     size_t Size = End + EntSize;
     Pieces.emplace_back(Off, !IsAlloc);
     Hashes.push_back(hash_value(toStringRef(Data.slice(0, Size))));
     Data = Data.slice(Size);
     Off += Size;
   }
 }
 
 // Split non-SHF_STRINGS section. Such section is a sequence of
 // fixed size records.
 template <class ELFT>
 void MergeInputSection<ELFT>::splitNonStrings(ArrayRef<uint8_t> Data,
                                               size_t EntSize) {
   size_t Size = Data.size();
   assert((Size % EntSize) == 0);
   bool IsAlloc = this->Flags & SHF_ALLOC;
   for (unsigned I = 0, N = Size; I != N; I += EntSize) {
     Hashes.push_back(hash_value(toStringRef(Data.slice(I, EntSize))));
     Pieces.emplace_back(I, !IsAlloc);
   }
 }
 
 template <class ELFT>
 MergeInputSection<ELFT>::MergeInputSection(elf::ObjectFile<ELFT> *F,
                                            const Elf_Shdr *Header,
                                            StringRef Name)
     : InputSectionBase<ELFT>(F, Header, Name, InputSectionBase<ELFT>::Merge) {}
 
 // This function is called after we obtain a complete list of input sections
 // that need to be linked. This is responsible to split section contents
 // into small chunks for further processing.
 //
 // Note that this function is called from parallel_for_each. This must be
 // thread-safe (i.e. no memory allocation from the pools).
 template <class ELFT> void MergeInputSection<ELFT>::splitIntoPieces() {
   ArrayRef<uint8_t> Data = this->Data;
   uintX_t EntSize = this->Entsize;
   if (this->Flags & SHF_STRINGS)
     splitStrings(Data, EntSize);
   else
     splitNonStrings(Data, EntSize);
 
   if (Config->GcSections && (this->Flags & SHF_ALLOC))
     for (uintX_t Off : LiveOffsets)
       this->getSectionPiece(Off)->Live = true;
 }
 
 template <class ELFT>
 bool MergeInputSection<ELFT>::classof(const InputSectionData *S) {
   return S->kind() == InputSectionBase<ELFT>::Merge;
 }
 
 // Do binary search to get a section piece at a given input offset.
 template <class ELFT>
 SectionPiece *MergeInputSection<ELFT>::getSectionPiece(uintX_t Offset) {
   auto *This = static_cast<const MergeInputSection<ELFT> *>(this);
   return const_cast<SectionPiece *>(This->getSectionPiece(Offset));
 }
 
 template <class It, class T, class Compare>
 static It fastUpperBound(It First, It Last, const T &Value, Compare Comp) {
   size_t Size = std::distance(First, Last);
   assert(Size != 0);
   while (Size != 1) {
     size_t H = Size / 2;
     const It MI = First + H;
     Size -= H;
     First = Comp(Value, *MI) ? First : First + H;
   }
   return Comp(Value, *First) ? First : First + 1;
 }
 
 template <class ELFT>
 const SectionPiece *
 MergeInputSection<ELFT>::getSectionPiece(uintX_t Offset) const {
   uintX_t Size = this->Data.size();
   if (Offset >= Size)
     fatal(toString(this) + ": entry is past the end of the section");
 
   // Find the element this offset points to.
   auto I = fastUpperBound(
       Pieces.begin(), Pieces.end(), Offset,
       [](const uintX_t &A, const SectionPiece &B) { return A < B.InputOff; });
   --I;
   return &*I;
 }
 
 // Returns the offset in an output section for a given input offset.
 // Because contents of a mergeable section is not contiguous in output,
 // it is not just an addition to a base output offset.
 template <class ELFT>
 typename ELFT::uint MergeInputSection<ELFT>::getOffset(uintX_t Offset) const {
   // Initialize OffsetMap lazily.
   std::call_once(InitOffsetMap, [&] {
     OffsetMap.reserve(Pieces.size());
     for (const SectionPiece &Piece : Pieces)
       OffsetMap[Piece.InputOff] = Piece.OutputOff;
   });
 
   // Find a string starting at a given offset.
   auto It = OffsetMap.find(Offset);
   if (It != OffsetMap.end())
     return It->second;
 
   if (!this->Live)
     return 0;
 
   // If Offset is not at beginning of a section piece, it is not in the map.
   // In that case we need to search from the original section piece vector.
   const SectionPiece &Piece = *this->getSectionPiece(Offset);
   if (!Piece.Live)
     return 0;
 
   uintX_t Addend = Offset - Piece.InputOff;
   return Piece.OutputOff + Addend;
 }
 
 template class elf::InputSectionBase<ELF32LE>;
 template class elf::InputSectionBase<ELF32BE>;
 template class elf::InputSectionBase<ELF64LE>;
 template class elf::InputSectionBase<ELF64BE>;
 
 template class elf::InputSection<ELF32LE>;
 template class elf::InputSection<ELF32BE>;
 template class elf::InputSection<ELF64LE>;
 template class elf::InputSection<ELF64BE>;
 
 template class elf::EhInputSection<ELF32LE>;
 template class elf::EhInputSection<ELF32BE>;
 template class elf::EhInputSection<ELF64LE>;
 template class elf::EhInputSection<ELF64BE>;
 
 template class elf::MergeInputSection<ELF32LE>;
 template class elf::MergeInputSection<ELF32BE>;
 template class elf::MergeInputSection<ELF64LE>;
 template class elf::MergeInputSection<ELF64BE>;
 
 template std::string lld::toString(const InputSectionBase<ELF32LE> *);
 template std::string lld::toString(const InputSectionBase<ELF32BE> *);
 template std::string lld::toString(const InputSectionBase<ELF64LE> *);
 template std::string lld::toString(const InputSectionBase<ELF64BE> *);
Index: head/contrib/llvm/tools/lld/ELF/Relocations.h
===================================================================
--- head/contrib/llvm/tools/lld/ELF/Relocations.h	(revision 319954)
+++ head/contrib/llvm/tools/lld/ELF/Relocations.h	(revision 319955)
@@ -1,130 +1,130 @@
 //===- Relocations.h -------------------------------------------*- C++ -*-===//
 //
 //                             The LLVM Linker
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLD_ELF_RELOCATIONS_H
 #define LLD_ELF_RELOCATIONS_H
 
 #include "lld/Core/LLVM.h"
 
 namespace lld {
 namespace elf {
 class SymbolBody;
 class InputSectionData;
 template <class ELFT> class InputSection;
 template <class ELFT> class InputSectionBase;
 
 // List of target-independent relocation types. Relocations read
 // from files are converted to these types so that the main code
 // doesn't have to know about architecture-specific details.
 enum RelExpr {
   R_ABS,
   R_GOT,
   R_GOTONLY_PC,
   R_GOTONLY_PC_FROM_END,
   R_GOTREL,
   R_GOTREL_FROM_END,
   R_GOT_FROM_END,
   R_GOT_OFF,
   R_GOT_PAGE_PC,
   R_GOT_PC,
   R_HINT,
+  R_MIPS_GOTREL,
   R_MIPS_GOT_LOCAL_PAGE,
   R_MIPS_GOT_OFF,
   R_MIPS_GOT_OFF32,
-  R_MIPS_GOTREL,
   R_MIPS_TLSGD,
   R_MIPS_TLSLD,
   R_NEG_TLS,
   R_PAGE_PC,
   R_PC,
   R_PLT,
-  R_PLT_PC,
   R_PLT_PAGE_PC,
+  R_PLT_PC,
   R_PPC_OPD,
   R_PPC_PLT_OPD,
   R_PPC_TOC,
   R_RELAX_GOT_PC,
   R_RELAX_GOT_PC_NOPIC,
   R_RELAX_TLS_GD_TO_IE,
-  R_RELAX_TLS_GD_TO_IE_END,
   R_RELAX_TLS_GD_TO_IE_ABS,
+  R_RELAX_TLS_GD_TO_IE_END,
   R_RELAX_TLS_GD_TO_IE_PAGE_PC,
   R_RELAX_TLS_GD_TO_LE,
   R_RELAX_TLS_GD_TO_LE_NEG,
   R_RELAX_TLS_IE_TO_LE,
   R_RELAX_TLS_LD_TO_LE,
   R_SIZE,
   R_THUNK_ABS,
   R_THUNK_PC,
   R_THUNK_PLT_PC,
   R_TLS,
   R_TLSDESC,
-  R_TLSDESC_PAGE,
   R_TLSDESC_CALL,
+  R_TLSDESC_PAGE,
   R_TLSGD,
   R_TLSGD_PC,
   R_TLSLD,
   R_TLSLD_PC,
 };
 
 // Build a bitmask with one bit set for each RelExpr.
 //
 // Constexpr function arguments can't be used in static asserts, so we
 // use template arguments to build the mask.
 // But function template partial specializations don't exist (needed
 // for base case of the recursion), so we need a dummy struct.
 template <RelExpr... Exprs> struct RelExprMaskBuilder {
   static inline uint64_t build() { return 0; }
 };
 
 // Specialization for recursive case.
 template <RelExpr Head, RelExpr... Tail>
 struct RelExprMaskBuilder<Head, Tail...> {
   static inline uint64_t build() {
     static_assert(0 <= Head && Head < 64,
                   "RelExpr is too large for 64-bit mask!");
     return (uint64_t(1) << Head) | RelExprMaskBuilder<Tail...>::build();
   }
 };
 
 // Return true if `Expr` is one of `Exprs`.
 // There are fewer than 64 RelExpr's, so we can represent any set of
 // RelExpr's as a constant bit mask and test for membership with a
 // couple cheap bitwise operations.
 template <RelExpr... Exprs> bool isRelExprOneOf(RelExpr Expr) {
   assert(0 <= Expr && (int)Expr < 64 && "RelExpr is too large for 64-bit mask!");
   return (uint64_t(1) << Expr) & RelExprMaskBuilder<Exprs...>::build();
 }
 
 // Architecture-neutral representation of relocation.
 struct Relocation {
   RelExpr Expr;
   uint32_t Type;
   uint64_t Offset;
   uint64_t Addend;
   SymbolBody *Sym;
 };
 
 template <class ELFT> void scanRelocations(InputSectionBase<ELFT> &);
 
 template <class ELFT> void createThunks(InputSectionBase<ELFT> &);
 
 template <class ELFT>
 static inline typename ELFT::uint getAddend(const typename ELFT::Rel &Rel) {
   return 0;
 }
 
 template <class ELFT>
 static inline typename ELFT::uint getAddend(const typename ELFT::Rela &Rel) {
   return Rel.r_addend;
 }
 }
 }
 
 #endif