X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FMCTargetDesc%2FX86ELFObjectWriter.cpp;h=45088835cfb9078719a19afec18be3a556ddc2bb;hb=c98092e28db7f3def249a1bf37483b264dd46194;hp=172887a48ec827b028d04b361378969119e8aeb5;hpb=df600f804907d478abc9968b1aa49dad3f21ce75;p=oota-llvm.git

diff --git a/lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp b/lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp
index 172887a48ec..45088835cfb 100644
--- a/lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86ELFObjectWriter.cpp
@@ -22,7 +22,8 @@ namespace {
   public:
     X86ELFObjectWriter(bool IsELF64, uint8_t OSABI, uint16_t EMachine);
 
-    virtual ~X86ELFObjectWriter();
+    ~X86ELFObjectWriter() override;
+
   protected:
     unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                           bool IsPCRel) const override;
@@ -38,243 +39,218 @@ X86ELFObjectWriter::X86ELFObjectWriter(bool IsELF64, uint8_t OSABI,
 X86ELFObjectWriter::~X86ELFObjectWriter()
 {}
 
-unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target,
-                                          const MCFixup &Fixup,
-                                          bool IsPCRel) const {
-  // determine the type of the relocation
-
-  MCSymbolRefExpr::VariantKind Modifier = Target.getAccessVariant();
-  unsigned Type;
-  if (getEMachine() == ELF::EM_X86_64) {
-    if (IsPCRel) {
-      switch ((unsigned)Fixup.getKind()) {
-      default: llvm_unreachable("invalid fixup kind!");
+enum X86_64RelType { RT64_64, RT64_32, RT64_32S, RT64_16, RT64_8 };
 
-      case FK_Data_8: Type = ELF::R_X86_64_PC64; break;
-      case FK_Data_4: Type = ELF::R_X86_64_PC32; break;
-      case FK_Data_2: Type = ELF::R_X86_64_PC16; break;
-      case FK_Data_1: Type = ELF::R_X86_64_PC8; break;
+static X86_64RelType getType64(unsigned Kind,
+                               MCSymbolRefExpr::VariantKind &Modifier,
+                               bool &IsPCRel) {
+  switch (Kind) {
+  default:
+    llvm_unreachable("Unimplemented");
+  case X86::reloc_global_offset_table8:
+    Modifier = MCSymbolRefExpr::VK_GOT;
+    IsPCRel = true;
+    return RT64_64;
+  case FK_Data_8:
+    return RT64_64;
+  case X86::reloc_signed_4byte:
+    if (Modifier == MCSymbolRefExpr::VK_None && !IsPCRel)
+      return RT64_32S;
+    return RT64_32;
+  case X86::reloc_global_offset_table:
+    Modifier = MCSymbolRefExpr::VK_GOT;
+    IsPCRel = true;
+    return RT64_32;
+  case FK_Data_4:
+  case FK_PCRel_4:
+  case X86::reloc_riprel_4byte:
+  case X86::reloc_riprel_4byte_movq_load:
+    return RT64_32;
+  case FK_Data_2:
+    return RT64_16;
+  case FK_PCRel_1:
+  case FK_Data_1:
+    return RT64_8;
+  }
+}
 
-      case FK_PCRel_8:
-        assert(Modifier == MCSymbolRefExpr::VK_None);
-        Type = ELF::R_X86_64_PC64;
-        break;
-      case X86::reloc_signed_4byte:
-      case X86::reloc_riprel_4byte_movq_load:
-      case X86::reloc_riprel_4byte:
-      case FK_PCRel_4:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_X86_64_PC32;
-          break;
-        case MCSymbolRefExpr::VK_PLT:
-          Type = ELF::R_X86_64_PLT32;
-          break;
-        case MCSymbolRefExpr::VK_GOTPCREL:
-          Type = ELF::R_X86_64_GOTPCREL;
-          break;
-        case MCSymbolRefExpr::VK_GOTTPOFF:
-          Type = ELF::R_X86_64_GOTTPOFF;
-          break;
-        case MCSymbolRefExpr::VK_TLSGD:
-          Type = ELF::R_X86_64_TLSGD;
-          break;
-        case MCSymbolRefExpr::VK_TLSLD:
-          Type = ELF::R_X86_64_TLSLD;
-          break;
-        }
-        break;
-      case FK_PCRel_2:
-        assert(Modifier == MCSymbolRefExpr::VK_None);
-        Type = ELF::R_X86_64_PC16;
-        break;
-      case FK_PCRel_1:
-        assert(Modifier == MCSymbolRefExpr::VK_None);
-        Type = ELF::R_X86_64_PC8;
-        break;
-      }
-    } else {
-      switch ((unsigned)Fixup.getKind()) {
-      default: llvm_unreachable("invalid fixup kind!");
-      case X86::reloc_global_offset_table8:
-        Type = ELF::R_X86_64_GOTPC64;
-        break;
-      case X86::reloc_global_offset_table:
-        Type = ELF::R_X86_64_GOTPC32;
-        break;
-      case FK_Data_8:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_X86_64_64;
-          break;
-        case MCSymbolRefExpr::VK_GOT:
-          Type = ELF::R_X86_64_GOT64;
-          break;
-        case MCSymbolRefExpr::VK_GOTOFF:
-          Type = ELF::R_X86_64_GOTOFF64;
-          break;
-        case MCSymbolRefExpr::VK_TPOFF:
-          Type = ELF::R_X86_64_TPOFF64;
-          break;
-        case MCSymbolRefExpr::VK_DTPOFF:
-          Type = ELF::R_X86_64_DTPOFF64;
-          break;
-        case MCSymbolRefExpr::VK_SIZE:
-          Type = ELF::R_X86_64_SIZE64;
-          break;
-        }
-        break;
-      case X86::reloc_signed_4byte:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_X86_64_32S;
-          break;
-        case MCSymbolRefExpr::VK_GOT:
-          Type = ELF::R_X86_64_GOT32;
-          break;
-        case MCSymbolRefExpr::VK_GOTPCREL:
-          Type = ELF::R_X86_64_GOTPCREL;
-          break;
-        case MCSymbolRefExpr::VK_TPOFF:
-          Type = ELF::R_X86_64_TPOFF32;
-          break;
-        case MCSymbolRefExpr::VK_DTPOFF:
-          Type = ELF::R_X86_64_DTPOFF32;
-          break;
-        case MCSymbolRefExpr::VK_SIZE:
-          Type = ELF::R_X86_64_SIZE32;
-          break;
-        }
-        break;
-      case FK_Data_4:
-        Type = ELF::R_X86_64_32;
-        break;
-      case FK_Data_2: Type = ELF::R_X86_64_16; break;
-      case FK_PCRel_1:
-      case FK_Data_1: Type = ELF::R_X86_64_8; break;
-      }
+static unsigned getRelocType64(MCSymbolRefExpr::VariantKind Modifier,
+                               X86_64RelType Type, bool IsPCRel) {
+  switch (Modifier) {
+  default:
+    llvm_unreachable("Unimplemented");
+  case MCSymbolRefExpr::VK_None:
+    switch (Type) {
+    case RT64_64:
+      return IsPCRel ? ELF::R_X86_64_PC64 : ELF::R_X86_64_64;
+    case RT64_32:
+      return IsPCRel ? ELF::R_X86_64_PC32 : ELF::R_X86_64_32;
+    case RT64_32S:
+      return ELF::R_X86_64_32S;
+    case RT64_16:
+      return IsPCRel ? ELF::R_X86_64_PC16 : ELF::R_X86_64_16;
+    case RT64_8:
+      return IsPCRel ? ELF::R_X86_64_PC8 : ELF::R_X86_64_8;
     }
-  } else if (getEMachine() == ELF::EM_386) {
-    if (IsPCRel) {
-      switch ((unsigned)Fixup.getKind()) {
-      default: llvm_unreachable("invalid fixup kind!");
-
-      case X86::reloc_global_offset_table:
-        Type = ELF::R_386_GOTPC;
-        break;
-
-      case FK_PCRel_1:
-      case FK_Data_1:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_386_PC8;
-          break;
-        }
-        break;
-
-      case FK_PCRel_2:
-      case FK_Data_2:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_386_PC16;
-          break;
-        }
-        break;
+  case MCSymbolRefExpr::VK_GOT:
+    switch (Type) {
+    case RT64_64:
+      return IsPCRel ? ELF::R_X86_64_GOTPC64 : ELF::R_X86_64_GOT64;
+    case RT64_32:
+      return IsPCRel ? ELF::R_X86_64_GOTPC32 : ELF::R_X86_64_GOT32;
+    case RT64_32S:
+    case RT64_16:
+    case RT64_8:
+      llvm_unreachable("Unimplemented");
+    }
+  case MCSymbolRefExpr::VK_GOTOFF:
+    assert(Type == RT64_64);
+    assert(!IsPCRel);
+    return ELF::R_X86_64_GOTOFF64;
+  case MCSymbolRefExpr::VK_TPOFF:
+    assert(!IsPCRel);
+    switch (Type) {
+    case RT64_64:
+      return ELF::R_X86_64_TPOFF64;
+    case RT64_32:
+      return ELF::R_X86_64_TPOFF32;
+    case RT64_32S:
+    case RT64_16:
+    case RT64_8:
+      llvm_unreachable("Unimplemented");
+    }
+  case MCSymbolRefExpr::VK_DTPOFF:
+    assert(!IsPCRel);
+    switch (Type) {
+    case RT64_64:
+      return ELF::R_X86_64_DTPOFF64;
+    case RT64_32:
+      return ELF::R_X86_64_DTPOFF32;
+    case RT64_32S:
+    case RT64_16:
+    case RT64_8:
+      llvm_unreachable("Unimplemented");
+    }
+  case MCSymbolRefExpr::VK_SIZE:
+    assert(!IsPCRel);
+    switch (Type) {
+    case RT64_64:
+      return ELF::R_X86_64_SIZE64;
+    case RT64_32:
+      return ELF::R_X86_64_SIZE32;
+    case RT64_32S:
+    case RT64_16:
+    case RT64_8:
+      llvm_unreachable("Unimplemented");
+    }
+  case MCSymbolRefExpr::VK_TLSGD:
+    assert(Type == RT64_32);
+    return ELF::R_X86_64_TLSGD;
+  case MCSymbolRefExpr::VK_GOTTPOFF:
+    assert(Type == RT64_32);
+    return ELF::R_X86_64_GOTTPOFF;
+  case MCSymbolRefExpr::VK_TLSLD:
+    assert(Type == RT64_32);
+    return ELF::R_X86_64_TLSLD;
+  case MCSymbolRefExpr::VK_PLT:
+    assert(Type == RT64_32);
+    return ELF::R_X86_64_PLT32;
+  case MCSymbolRefExpr::VK_GOTPCREL:
+    assert(Type == RT64_32);
+    return ELF::R_X86_64_GOTPCREL;
+  }
+}
 
-      case X86::reloc_riprel_4byte:
-      case X86::reloc_signed_4byte:
-      case FK_PCRel_4:
-      case FK_Data_4:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_386_PC32;
-          break;
-        case MCSymbolRefExpr::VK_PLT:
-          Type = ELF::R_386_PLT32;
-          break;
-        }
-        break;
-      }
-    } else {
-      switch ((unsigned)Fixup.getKind()) {
-      default: llvm_unreachable("invalid fixup kind!");
+enum X86_32RelType { RT32_32, RT32_16, RT32_8 };
 
-      case X86::reloc_global_offset_table:
-        Type = ELF::R_386_GOTPC;
-        break;
+static X86_32RelType getType32(X86_64RelType T) {
+  switch (T) {
+  case RT64_64:
+    llvm_unreachable("Unimplemented");
+  case RT64_32:
+  case RT64_32S:
+    return RT32_32;
+  case RT64_16:
+    return RT32_16;
+  case RT64_8:
+    return RT32_8;
+  }
+  llvm_unreachable("unexpected relocation type!");
+}
 
-      // FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode
-      // instead?
-      case X86::reloc_signed_4byte:
-      case FK_PCRel_4:
-      case FK_Data_4:
-        switch (Modifier) {
-        default:
-          llvm_unreachable("Unimplemented");
-        case MCSymbolRefExpr::VK_None:
-          Type = ELF::R_386_32;
-          break;
-        case MCSymbolRefExpr::VK_GOT:
-          Type = ELF::R_386_GOT32;
-          break;
-        case MCSymbolRefExpr::VK_PLT:
-          Type = ELF::R_386_PLT32;
-          break;
-        case MCSymbolRefExpr::VK_GOTOFF:
-          Type = ELF::R_386_GOTOFF;
-          break;
-        case MCSymbolRefExpr::VK_TLSGD:
-          Type = ELF::R_386_TLS_GD;
-          break;
-        case MCSymbolRefExpr::VK_TPOFF:
-          Type = ELF::R_386_TLS_LE_32;
-          break;
-        case MCSymbolRefExpr::VK_INDNTPOFF:
-          Type = ELF::R_386_TLS_IE;
-          break;
-        case MCSymbolRefExpr::VK_NTPOFF:
-          Type = ELF::R_386_TLS_LE;
-          break;
-        case MCSymbolRefExpr::VK_GOTNTPOFF:
-          Type = ELF::R_386_TLS_GOTIE;
-          break;
-        case MCSymbolRefExpr::VK_TLSLDM:
-          Type = ELF::R_386_TLS_LDM;
-          break;
-        case MCSymbolRefExpr::VK_DTPOFF:
-          Type = ELF::R_386_TLS_LDO_32;
-          break;
-        case MCSymbolRefExpr::VK_GOTTPOFF:
-          Type = ELF::R_386_TLS_IE_32;
-          break;
-        }
-        break;
-      case FK_Data_2: Type = ELF::R_386_16; break;
-      case FK_PCRel_1:
-      case FK_Data_1: Type = ELF::R_386_8; break;
-      }
+static unsigned getRelocType32(MCSymbolRefExpr::VariantKind Modifier,
+                               X86_32RelType Type, bool IsPCRel) {
+  switch (Modifier) {
+  default:
+    llvm_unreachable("Unimplemented");
+  case MCSymbolRefExpr::VK_None:
+    switch (Type) {
+    case RT32_32:
+      return IsPCRel ? ELF::R_386_PC32 : ELF::R_386_32;
+    case RT32_16:
+      return IsPCRel ? ELF::R_386_PC16 : ELF::R_386_16;
+    case RT32_8:
+      return IsPCRel ? ELF::R_386_PC8 : ELF::R_386_8;
     }
-  } else
-    llvm_unreachable("Unsupported ELF machine type.");
+  case MCSymbolRefExpr::VK_GOT:
+    assert(Type == RT32_32);
+    return IsPCRel ? ELF::R_386_GOTPC : ELF::R_386_GOT32;
+  case MCSymbolRefExpr::VK_GOTOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_GOTOFF;
+  case MCSymbolRefExpr::VK_TPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_LE_32;
+  case MCSymbolRefExpr::VK_DTPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_LDO_32;
+  case MCSymbolRefExpr::VK_TLSGD:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_GD;
+  case MCSymbolRefExpr::VK_GOTTPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_IE_32;
+  case MCSymbolRefExpr::VK_PLT:
+    assert(Type == RT32_32);
+    return ELF::R_386_PLT32;
+  case MCSymbolRefExpr::VK_INDNTPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_IE;
+  case MCSymbolRefExpr::VK_NTPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_LE;
+  case MCSymbolRefExpr::VK_GOTNTPOFF:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_GOTIE;
+  case MCSymbolRefExpr::VK_TLSLDM:
+    assert(Type == RT32_32);
+    assert(!IsPCRel);
+    return ELF::R_386_TLS_LDM;
+  }
+}
+
+unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target,
+                                          const MCFixup &Fixup,
+                                          bool IsPCRel) const {
+  MCSymbolRefExpr::VariantKind Modifier = Target.getAccessVariant();
+  X86_64RelType Type = getType64(Fixup.getKind(), Modifier, IsPCRel);
+  if (getEMachine() == ELF::EM_X86_64)
+    return getRelocType64(Modifier, Type, IsPCRel);
 
-  return Type;
+  assert(getEMachine() == ELF::EM_386 && "Unsupported ELF machine type.");
+  return getRelocType32(Modifier, getType32(Type), IsPCRel);
 }
 
-MCObjectWriter *llvm::createX86ELFObjectWriter(raw_ostream &OS,
-                                               bool IsELF64,
-                                               uint8_t OSABI,
+MCObjectWriter *llvm::createX86ELFObjectWriter(raw_pwrite_stream &OS,
+                                               bool IsELF64, uint8_t OSABI,
                                                uint16_t EMachine) {
   MCELFObjectTargetWriter *MOTW =
     new X86ELFObjectWriter(IsELF64, OSABI, EMachine);