Copy of D14211

ELF/Driver.cpp

 //===- Driver.cpp ---------------------------------------------------------===//
 //
 //                             The LLVM Linker
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "Driver.h"
 #include "Config.h"
 #include "Error.h"
 #include "InputFiles.h"
+#include "OutputSections.h"
 #include "SymbolTable.h"
 #include "Target.h"
 #include "Writer.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include <utility>
 
if (!Config->Shared) {
     // The situation is even stranger on x86_64 where the assembly doesn't
     // need the magical symbol, but gas still puts _GLOBAL_OFFSET_TABLE_ as
     // an undefined symbol in the .o files.
     // Given that the symbol is effectively unused, we just create a dummy
     // hidden one to avoid the undefined symbol error.
     Symtab.addIgnoredSym("_GLOBAL_OFFSET_TABLE_");
   }
 
+  // Define _gp for MIPS. st_value of _gp symbol will be updated by Writer
+  // so that it points to an absolute address which is relative to GOT.
+  if (Config->EMachine == EM_MIPS)
+    Symtab.addAbsoluteSym("_gp", Out<ELFT>::MipsGpSym);
+
   for (std::unique_ptr<InputFile> &F : Files)
     Symtab.addFile(std::move(F));
 
   for (StringRef S : Config->Undefined)
     Symtab.addUndefinedOpt(S);
 
   if (Config->OutputFile.empty())
     Config->OutputFile = "a.out";
 
   // Write the result to the file.
   Symtab.scanShlibUndefined();
   if (Config->GcSections)
     markLive<ELFT>(&Symtab);
   writeResult<ELFT>(&Symtab);
 }

ELF/OutputSections.h

 };
 
 template <class ELFT> class GotSection final : public OutputSectionBase<ELFT> {
   typedef OutputSectionBase<ELFT> Base;
   typedef typename Base::uintX_t uintX_t;
 
 public:
   GotSection();
-  void finalize() override {
-    this->Header.sh_size = Entries.size() * sizeof(uintX_t);
-  }
+  void finalize() override;
   void writeTo(uint8_t *Buf) override;
   void addEntry(SymbolBody *Sym);
   bool empty() const { return Entries.empty(); }
   uintX_t getEntryAddr(const SymbolBody &B) const;
 
 private:
   std::vector<const SymbolBody *> Entries;
 };
private:
   uint32_t DtFlags = 0;
   uint32_t DtFlags1 = 0;
 };
 
 // All output sections that are hadnled by the linker specially are
 // globally accessible. Writer initializes them, so don't use them
 // until Writer is initialized.
 template <class ELFT> struct Out {
+  typedef typename llvm::object::ELFFile<ELFT>::Elf_Sym Elf_Sym;
   typedef typename llvm::object::ELFFile<ELFT>::uintX_t uintX_t;
   static DynamicSection<ELFT> *Dynamic;
   static GnuHashTableSection<ELFT> *GnuHashTab;
   static GotPltSection<ELFT> *GotPlt;
   static GotSection<ELFT> *Got;
   static HashTableSection<ELFT> *HashTab;
   static InterpSection<ELFT> *Interp;
   static OutputSection<ELFT> *Bss;
   static OutputSectionBase<ELFT> *Opd;
   static uint8_t *OpdBuf;
   static PltSection<ELFT> *Plt;
   static RelocationSection<ELFT> *RelaDyn;
   static RelocationSection<ELFT> *RelaPlt;
   static StringTableSection<ELFT> *DynStrTab;
   static StringTableSection<ELFT> *ShStrTab;
   static StringTableSection<ELFT> *StrTab;
   static SymbolTableSection<ELFT> *DynSymTab;
   static SymbolTableSection<ELFT> *SymTab;
+  static Elf_Sym MipsGpSym;
   static uintX_t TlsInitImageVA;
 };
 
 template <class ELFT> DynamicSection<ELFT> *Out<ELFT>::Dynamic;
 template <class ELFT> GnuHashTableSection<ELFT> *Out<ELFT>::GnuHashTab;
 template <class ELFT> GotPltSection<ELFT> *Out<ELFT>::GotPlt;
 template <class ELFT> GotSection<ELFT> *Out<ELFT>::Got;
 template <class ELFT> HashTableSection<ELFT> *Out<ELFT>::HashTab;
 template <class ELFT> InterpSection<ELFT> *Out<ELFT>::Interp;
 template <class ELFT> OutputSection<ELFT> *Out<ELFT>::Bss;
 template <class ELFT> OutputSectionBase<ELFT> *Out<ELFT>::Opd;
 template <class ELFT> uint8_t *Out<ELFT>::OpdBuf;
 template <class ELFT> PltSection<ELFT> *Out<ELFT>::Plt;
 template <class ELFT> RelocationSection<ELFT> *Out<ELFT>::RelaDyn;
 template <class ELFT> RelocationSection<ELFT> *Out<ELFT>::RelaPlt;
 template <class ELFT> StringTableSection<ELFT> *Out<ELFT>::DynStrTab;
 template <class ELFT> StringTableSection<ELFT> *Out<ELFT>::ShStrTab;
 template <class ELFT> StringTableSection<ELFT> *Out<ELFT>::StrTab;
 template <class ELFT> SymbolTableSection<ELFT> *Out<ELFT>::DynSymTab;
 template <class ELFT> SymbolTableSection<ELFT> *Out<ELFT>::SymTab;
+template <class ELFT> typename Out<ELFT>::Elf_Sym Out<ELFT>::MipsGpSym;
 template <class ELFT> typename Out<ELFT>::uintX_t Out<ELFT>::TlsInitImageVA;
 
 } // namespace elf2
 } // namespace lld
 
 #endif // LLD_ELF_OUTPUT_SECTIONS_H

ELF/OutputSections.cpp

 template <class ELFT>
 GotSection<ELFT>::GotSection()
     : OutputSectionBase<ELFT>(".got", llvm::ELF::SHT_PROGBITS,
                               llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE) {
   this->Header.sh_addralign = sizeof(uintX_t);
 }
 
 template <class ELFT> void GotSection<ELFT>::addEntry(SymbolBody *Sym) {
-  Sym->GotIndex = Entries.size();
+  Sym->GotIndex = Target->getGotHeaderEntriesNum() + Entries.size();
   Entries.push_back(Sym);
 }
 
 template <class ELFT>
 typename GotSection<ELFT>::uintX_t
 GotSection<ELFT>::getEntryAddr(const SymbolBody &B) const {
   return this->getVA() + B.GotIndex * sizeof(uintX_t);
 }
 
+template <class ELFT> void GotSection<ELFT>::finalize() {
+  this->Header.sh_size =
+      (Target->getGotHeaderEntriesNum() + Entries.size()) * sizeof(uintX_t);
+}
+
 template <class ELFT> void GotSection<ELFT>::writeTo(uint8_t *Buf) {
+  Target->writeGotHeaderEntries(Buf);
+  Buf += Target->getGotHeaderEntriesNum() * sizeof(uintX_t);
   for (const SymbolBody *B : Entries) {
     uint8_t *Entry = Buf;
     Buf += sizeof(uintX_t);
     if (canBePreempted(B, false))
       continue; // The dynamic linker will take care of it.
     uintX_t VA = getSymVA<ELFT>(*B);
     write<uintX_t, ELFT::TargetEndianness, sizeof(uintX_t)>(Entry, VA);
   }

ELF/SymbolTable.h

public:
   }
 
   const std::vector<std::unique_ptr<SharedFile<ELFT>>> &getSharedFiles() const {
     return SharedFiles;
   }
 
   SymbolBody *addUndefined(StringRef Name);
   SymbolBody *addUndefinedOpt(StringRef Name);
+  void addAbsoluteSym(StringRef Name,
+                      typename llvm::object::ELFFile<ELFT>::Elf_Sym &ESym);
   void addSyntheticSym(StringRef Name, OutputSectionBase<ELFT> &Section,
                        typename llvm::object::ELFFile<ELFT>::uintX_t Value);
   void addIgnoredSym(StringRef Name);
   bool isUndefined(StringRef Name);
   void scanShlibUndefined();
   SymbolBody *find(StringRef Name);
 
 private:

ELF/SymbolTable.cpp

 template <class ELFT>
 SymbolBody *SymbolTable<ELFT>::addUndefinedOpt(StringRef Name) {
   auto *Sym = new (Alloc) Undefined<ELFT>(Name, Undefined<ELFT>::Optional);
   resolve(Sym);
   return Sym;
 }
 
 template <class ELFT>
+void SymbolTable<ELFT>::addAbsoluteSym(StringRef Name,
+                                       typename ELFFile<ELFT>::Elf_Sym &ESym) {
+  resolve(new (Alloc) DefinedAbsolute<ELFT>(Name, ESym));
+}
+
+template <class ELFT>
 void SymbolTable<ELFT>::addSyntheticSym(StringRef Name,
                                         OutputSectionBase<ELFT> &Section,
                                         typename ELFFile<ELFT>::uintX_t Value) {
   typedef typename DefinedSynthetic<ELFT>::Elf_Sym Elf_Sym;
   auto ESym = new (Alloc) Elf_Sym;
   memset(ESym, 0, sizeof(Elf_Sym));
   ESym->st_value = Value;
   auto Sym = new (Alloc) DefinedSynthetic<ELFT>(Name, *ESym, Section);

ELF/Target.h

 //===- Target.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_TARGET_H
 #define LLD_ELF_TARGET_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Object/ELF.h"
 
 #include <memory>
 
 namespace lld {
 namespace elf2 {
 class SymbolBody;
 
 class TargetInfo {
 public:
   unsigned getPageSize() const { return PageSize; }
   uint64_t getVAStart() const { return VAStart; }
   unsigned getCopyReloc() const { return CopyReloc; }
   unsigned getPCRelReloc() const { return PCRelReloc; }
   unsigned getGotReloc() const { return GotReloc; }
   unsigned getPltReloc() const { return PltReloc; }
   unsigned getGotRefReloc() const { return GotRefReloc; }
   unsigned getRelativeReloc() const { return RelativeReloc; }
   unsigned getPltZeroEntrySize() const { return PltZeroEntrySize; }
   unsigned getPltEntrySize() const { return PltEntrySize; }
   bool supportsLazyRelocations() const { return LazyRelocations; }
+  unsigned getGotHeaderEntriesNum() const { return GotHeaderEntriesNum; }
   virtual unsigned getPLTRefReloc(unsigned Type) const;
+  virtual void writeGotHeaderEntries(uint8_t *Buf) const;
   virtual void writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const = 0;
   virtual void writePltZeroEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                                  uint64_t PltEntryAddr) const = 0;
   virtual void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                              uint64_t PltEntryAddr, int32_t Index) const = 0;
   virtual bool isRelRelative(uint32_t Type) const;
   virtual bool relocNeedsCopy(uint32_t Type, const SymbolBody &S) const;
   virtual bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const = 0;
protected:
   unsigned CopyReloc;
   unsigned PCRelReloc;
   unsigned GotRefReloc;
   unsigned GotReloc;
   unsigned PltReloc;
   unsigned RelativeReloc;
   unsigned PltEntrySize = 8;
   unsigned PltZeroEntrySize = 0;
+  unsigned GotHeaderEntriesNum = 0;
   bool LazyRelocations = false;
 };
 
 uint64_t getPPC64TocBase();
 
+template <class ELFT>
+typename llvm::object::ELFFile<ELFT>::uintX_t getMipsGpAddr();
+
 extern std::unique_ptr<TargetInfo> Target;
 TargetInfo *createTarget();
 }
 }
 
 #endif

ELF/Target.cpp

 using namespace llvm::support::endian;
 using namespace llvm::ELF;
 
 namespace lld {
 namespace elf2 {
 
 std::unique_ptr<TargetInfo> Target;
 
+template <bool IsLE> static uint32_t read32(const uint8_t *L);
+template <> uint32_t read32<true>(const uint8_t *L) { return read32le(L); }
+template <> uint32_t read32<false>(const uint8_t *L) { return read32be(L); }
+
+template <bool IsLE> static void write32(uint8_t *L, uint32_t V);
+template <> void write32<true>(uint8_t *L, uint32_t V) { write32le(L, V); }
+template <> void write32<false>(uint8_t *L, uint32_t V) { write32be(L, V); }
+
 static void add32le(uint8_t *L, int32_t V) { write32le(L, read32le(L) + V); }
 static void add32be(uint8_t *L, int32_t V) { write32be(L, read32be(L) + V); }
 static void or32le(uint8_t *L, int32_t V) { write32le(L, read32le(L) | V); }
 
 template <bool IsLE> static void add32(uint8_t *L, int32_t V);
 template <> void add32<true>(uint8_t *L, int32_t V) { add32le(L, V); }
 template <> void add32<false>(uint8_t *L, int32_t V) { add32be(L, V); }
 
public:
   bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
   void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
                    uint64_t SA) const override;
 };
 
 template <class ELFT> class MipsTargetInfo final : public TargetInfo {
 public:
   MipsTargetInfo();
+  void writeGotHeaderEntries(uint8_t *Buf) const override;
   void writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const override;
   void writePltZeroEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                          uint64_t PltEntryAddr) const override;
   void writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                      uint64_t PltEntryAddr, int32_t Index) const override;
   bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
   bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
   void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,

 }
 
 unsigned TargetInfo::getPLTRefReloc(unsigned Type) const { return PCRelReloc; }
 
 bool TargetInfo::relocPointsToGot(uint32_t Type) const { return false; }
 
 bool TargetInfo::isRelRelative(uint32_t Type) const { return true; }
 
+void TargetInfo::writeGotHeaderEntries(uint8_t *Buf) const {}
+
 X86TargetInfo::X86TargetInfo() {
   PCRelReloc = R_386_PC32;
   GotReloc = R_386_GLOB_DAT;
   GotRefReloc = R_386_GOT32;
   PltReloc = R_386_JUMP_SLOT;
 }
 
 void X86TargetInfo::writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const {}
case R_AARCH64_PREL64:
     break;
   default:
     error("unrecognized reloc " + Twine(Type));
   }
 }
 
 template <class ELFT> MipsTargetInfo<ELFT>::MipsTargetInfo() {
   PageSize = 65536;
+  GotRefReloc = R_MIPS_GOT16;
+  GotHeaderEntriesNum = 2;
+}
+
+template <class ELFT>
+void MipsTargetInfo<ELFT>::writeGotHeaderEntries(uint8_t *Buf) const {
+  typedef typename llvm::object::ELFFile<ELFT>::Elf_Off Elf_Off;
+  auto *P = reinterpret_cast<Elf_Off *>(Buf);
+  // Module pointer
+  P[1] = ELFT::Is64Bits ? 0x8000000000000000 : 0x80000000;
 }
 
 template <class ELFT>
 void MipsTargetInfo<ELFT>::writeGotPltEntry(uint8_t *Buf, uint64_t Plt) const {}
 template <class ELFT>
 void MipsTargetInfo<ELFT>::writePltZeroEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                                        uint64_t PltEntryAddr) const {}
 template <class ELFT>
 void MipsTargetInfo<ELFT>::writePltEntry(uint8_t *Buf, uint64_t GotEntryAddr,
                                          uint64_t PltEntryAddr, int32_t Index) const {}
 
 template <class ELFT>
 bool MipsTargetInfo<ELFT>::relocNeedsGot(uint32_t Type,
                                          const SymbolBody &S) const {
-  return false;
+  return Type == R_MIPS_GOT16;
 }
 
 template <class ELFT>
 bool MipsTargetInfo<ELFT>::relocNeedsPlt(uint32_t Type,
                                          const SymbolBody &S) const {
   return false;
 }
 
 template <class ELFT>
 void MipsTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint8_t *BufEnd,
                                        uint32_t Type, uint64_t P,
                                        uint64_t SA) const {
   const bool IsLE = ELFT::TargetEndianness == support::little;
   switch (Type) {
   case R_MIPS_32:
     add32<IsLE>(Loc, SA);
     break;
+  case R_MIPS_GOT16: {
+    int64_t V = SA - getMipsGpAddr<ELFT>();
+    if (!isInt<16>(V))
+      error("Relocation R_MIPS_GOT16 out of range");
+    write32<IsLE>(Loc, (read32<IsLE>(Loc) & 0xffff0000) | (V & 0xffff));
+    break;
+  }
   default:
     error("unrecognized reloc " + Twine(Type));
   }
 }
+
+template <class ELFT>
+typename llvm::object::ELFFile<ELFT>::uintX_t getMipsGpAddr() {
+  const unsigned GPOffset = 0x7ff0;
+  return Out<ELFT>::Got->empty() ? 0 : (Out<ELFT>::Got->getVA() + GPOffset);
+}
+
+template uint32_t getMipsGpAddr<ELF32LE>();
+template uint32_t getMipsGpAddr<ELF32BE>();
+template uint64_t getMipsGpAddr<ELF64LE>();
+template uint64_t getMipsGpAddr<ELF64BE>();
 }
 }

ELF/Writer.cpp

template <class ELFT> void Writer<ELFT>::assignAddresses() {
   if (Interp) {
     Interp->p_type = PT_INTERP;
     copyPhdr(Interp, Out<ELFT>::Interp);
   }
 
   // Add space for section headers.
   SectionHeaderOff = RoundUpToAlignment(FileOff, ELFT::Is64Bits ? 8 : 4);
   FileSize = SectionHeaderOff + getNumSections() * sizeof(Elf_Shdr);
+
+  // Update MIPS _gp absolute symbol so that it points to the static data.
+  if (Config->EMachine == EM_MIPS)
+    Out<ELFT>::MipsGpSym.st_value = getMipsGpAddr<ELFT>();
 }
 
 // Returns the number of PHDR entries.
 template <class ELFT> int Writer<ELFT>::getPhdrsNum() const {
   bool Tls = false;
   int I = 2; // 2 for PT_PHDR and the first PT_LOAD
   if (needsInterpSection())
     ++I;

test/elf2/basic-mips.s

 # CHECK-NEXT:     ABIVersion: 0
 # CHECK-NEXT:     Unused: (00 00 00 00 00 00 00)
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Type: Executable (0x2)
 # CHECK-NEXT:   Machine: EM_MIPS (0x8)
 # CHECK-NEXT:   Version: 1
 # CHECK-NEXT:   Entry: 0x20000
 # CHECK-NEXT:   ProgramHeaderOffset: 0x34
-# CHECK-NEXT:   SectionHeaderOffset: 0x20070
+# CHECK-NEXT:   SectionHeaderOffset: 0x20084
 # CHECK-NEXT:   Flags [ (0x0)
 # CHECK-NEXT:   ]
 # CHECK-NEXT:   HeaderSize: 52
 # CHECK-NEXT:   ProgramHeaderEntrySize: 32
 # CHECK-NEXT:   ProgramHeaderCount: 4
 # CHECK-NEXT:   SectionHeaderEntrySize: 40
 # CHECK-NEXT:   SectionHeaderCount: 9
 # CHECK-NEXT:   StringTableSectionIndex: 7

 # CHECK-NEXT:   Section {
 # CHECK-NEXT:     Index: 6
 # CHECK-NEXT:     Name: .symtab
 # CHECK-NEXT:     Type: SHT_SYMTAB (0x2)
 # CHECK-NEXT:     Flags [ (0x0)
 # CHECK-NEXT:     ]
 # CHECK-NEXT:     Address: 0x0
 # CHECK-NEXT:     Offset: 0x20000
-# CHECK-NEXT:     Size: 32
+# CHECK-NEXT:     Size: 48
 # CHECK-NEXT:     Link: 8
 # CHECK-NEXT:     Info: 1
 # CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 16
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
 # CHECK-NEXT:     Index: 7
 # CHECK-NEXT:     Name: .shstrtab
 # CHECK-NEXT:     Type: SHT_STRTAB (0x3)
 # CHECK-NEXT:     Flags [ (0x0)
 # CHECK-NEXT:     ]
 # CHECK-NEXT:     Address: 0x0
-# CHECK-NEXT:     Offset: 0x20020
+# CHECK-NEXT:     Offset: 0x20030
 # CHECK-NEXT:     Size: 68
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
 # CHECK-NEXT:     AddressAlignment: 1
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
 # CHECK-NEXT:     Index: 8
 # CHECK-NEXT:     Name: .strtab (46)
 # CHECK-NEXT:     Type: SHT_STRTAB (0x3)
 # CHECK-NEXT:     Flags [ (0x0)
 # CHECK-NEXT:     ]
 # CHECK-NEXT:     Address: 0x0
-# CHECK-NEXT:     Offset: 0x20064
-# CHECK-NEXT:     Size: 9
+# CHECK-NEXT:     Offset: 0x20074
+# CHECK-NEXT:     Size: 13
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
 # CHECK-NEXT:     AddressAlignment: 1
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT: ]
 # CHECK-NEXT: Symbols [
 # CHECK-NEXT:   Symbol {
 # CHECK-NEXT:     Name:  (0)
 # CHECK-NEXT:     Value: 0x0
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Binding: Local (0x0)
 # CHECK-NEXT:     Type: None (0x0)
 # CHECK-NEXT:     Other: 0
 # CHECK-NEXT:     Section: Undefined (0x0)
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Symbol {
+# CHECK-NEXT:     Name: _gp
+# CHECK-NEXT:     Value: 0x0
+# CHECK-NEXT:     Size: 0
+# CHECK-NEXT:     Binding: Local (0x0)
+# CHECK-NEXT:     Type: None (0x0)
+# CHECK-NEXT:     Other: 0
+# CHECK-NEXT:     Section: Absolute (0xFFF1)
+# CHECK-NEXT:   }
+# CHECK-NEXT:   Symbol {
 # CHECK-NEXT:     Name: __start
 # CHECK-NEXT:     Value: 0x20000
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Binding: Global (0x1)
 # CHECK-NEXT:     Type: None (0x0)
 # CHECK-NEXT:     Other: 0
 # CHECK-NEXT:     Section: .text
 # CHECK-NEXT:   }

test/elf2/mips-got-relocs.s

+# Check R_MIPS_GOT16 relocation calculation.
+
+# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t-be.o
+# RUN: ld.lld2 %t-be.o -o %t-be.exe
+# RUN: llvm-objdump -section-headers -t %t-be.exe | FileCheck %s
+# RUN: llvm-objdump -s -section=.got %t-be.exe | FileCheck -check-prefix=BEGOT %s
+# RUN: llvm-objdump -d %t-be.exe | FileCheck -check-prefix=BEDIS %s
+
+# RUN: llvm-mc -filetype=obj -triple=mipsel-unknown-linux %s -o %t-el.o
+# RUN: ld.lld2 %t-el.o -o %t-el.exe
+# RUN: llvm-objdump -section-headers -t %t-el.exe | FileCheck %s
+# RUN: llvm-objdump -s -section=.got %t-el.exe | FileCheck -check-prefix=ELGOT %s
+# RUN: llvm-objdump -d %t-el.exe | FileCheck -check-prefix=ELDIS %s
+
+# REQUIRES: mips
+
+  .text
+  .globl  __start
+__start:
+  lui $2, %got(v1)
+
+  .data
+  .globl v1
+  .type  v1,@object
+  .size  v1,4
+v1:
+  .word 0
+
+# CHECK: Sections:
+# CHECK: .got 0000000c 0000000000030004 DATA
+# CHECK: SYMBOL TABLE:
+# CHECK: 00037ff4         *ABS*    00000000 _gp
+#        ^-- .got + GP offset (0x7ff0)
+# CHECK: 00030000 g       .data    00000004 v1
+
+# BEGOT: Contents of section .got:
+# BEGOT:  30004 00000000 80000000 00030000
+#               ^        ^        ^-- v1 (0x30000)
+#               |        +-- Module pointer (0x80000000)
+#               +-- Lazy resolver (0x0)
+
+# ELGOT: Contents of section .got:
+# ELGOT:  30004 00000000 00000080 00000300
+#               ^        ^        ^-- v1 (0x30000)
+#               |        +-- Module pointer (0x80000000)
+#               +-- Lazy resolver (0x0)
+
+# v1GotAddr(0x3000c) - _gp (0x37ff4) = -0x7fe8 => 0x8018 = 32792
+# BEDIS:  20000:  3c 02 80 18  lui $2, 32792
+# ELDIS:  20000:  18 80 02 3c  lui $2, 32792