Import LLVM r73954.

2 files changed, 78 insertions, 0 deletions

diff --git a/lib/Target/X86/X86ELFWriterInfo.cpp b/lib/Target/X86/X86ELFWriterInfo.cpp
index d84034b..315118f 100644
--- a/lib/Target/X86/X86ELFWriterInfo.cpp
+++ b/lib/Target/X86/X86ELFWriterInfo.cpp
@@ -12,11 +12,17 @@
 //===----------------------------------------------------------------------===//
 
 #include "X86ELFWriterInfo.h"
+#include "X86Relocations.h"
 #include "llvm/Function.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
+
 using namespace llvm;
 
+//===----------------------------------------------------------------------===//
+//  Implementation of the X86ELFWriterInfo class
+//===----------------------------------------------------------------------===//
+
 X86ELFWriterInfo::X86ELFWriterInfo(TargetMachine &TM)
   : TargetELFWriterInfo(TM) {
     bool is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64;
@@ -25,6 +31,34 @@ X86ELFWriterInfo::X86ELFWriterInfo(TargetMachine &TM)
 
 X86ELFWriterInfo::~X86ELFWriterInfo() {}
 
+unsigned X86ELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
+  if (is64Bit) {
+    switch(MachineRelTy) {
+    case X86::reloc_pcrel_word:
+      return R_X86_64_PC32;
+    case X86::reloc_absolute_word:
+      return R_X86_64_32;
+    case X86::reloc_absolute_dword:
+      return R_X86_64_64;
+    case X86::reloc_picrel_word:
+    default:
+      assert(0 && "unknown relocation type");
+    }
+  } else {
+    switch(MachineRelTy) {
+    case X86::reloc_pcrel_word:
+      return R_386_PC32;
+    case X86::reloc_absolute_word:
+      return R_386_32;
+    case X86::reloc_absolute_dword:
+    case X86::reloc_picrel_word:
+    default:
+      assert(0 && "unknown relocation type");
+    }
+  }
+  return 0;
+}
+
 unsigned X86ELFWriterInfo::getFunctionAlignment(const Function *F) const {
   unsigned FnAlign = 4;
 
@@ -36,3 +70,15 @@ unsigned X86ELFWriterInfo::getFunctionAlignment(const Function *F) const {
 
   return (1 << FnAlign);
 }
+
+long int X86ELFWriterInfo::getAddendForRelTy(unsigned RelTy) const {
+  if (is64Bit) {
+    switch(RelTy) {
+    case R_X86_64_PC32: return -4;
+      break;
+    default:
+      assert(0 && "unknown x86 relocation type");
+    }
+  }
+  return 0;
+}
diff --git a/lib/Target/X86/X86ELFWriterInfo.h b/lib/Target/X86/X86ELFWriterInfo.h
index e9c5bc4..96485b8 100644
--- a/lib/Target/X86/X86ELFWriterInfo.h
+++ b/lib/Target/X86/X86ELFWriterInfo.h
@@ -19,11 +19,43 @@
 namespace llvm {
 
   class X86ELFWriterInfo : public TargetELFWriterInfo {
+
+    // ELF Relocation types for X86
+    enum X86RelocationType {
+      R_386_NONE = 0,
+      R_386_32   = 1,
+      R_386_PC32 = 2
+    };
+
+    // ELF Relocation types for X86_64
+    enum X86_64RelocationType {
+      R_X86_64_NONE = 0,
+      R_X86_64_64   = 1,
+      R_X86_64_PC32 = 2,
+      R_X86_64_32   = 10,
+      R_X86_64_32S  = 11,
+      R_X86_64_PC64 = 24
+    };
+
   public:
     X86ELFWriterInfo(TargetMachine &TM);
     virtual ~X86ELFWriterInfo();
 
+    /// getFunctionAlignment - Returns the alignment for function 'F', targets
+    /// with different alignment constraints should overload this method
     virtual unsigned getFunctionAlignment(const Function *F) const;
+
+    /// getRelocationType - Returns the target specific ELF Relocation type.
+    /// 'MachineRelTy' contains the object code independent relocation type
+    virtual unsigned getRelocationType(unsigned MachineRelTy) const;
+
+    /// hasRelocationAddend - True if the target uses an addend in the
+    /// ELF relocation entry.
+    virtual bool hasRelocationAddend() const { return is64Bit ? true : false; }
+
+    /// getAddendForRelTy - Gets the addend value for an ELF relocation entry
+    /// based on the target relocation type
+    virtual long int getAddendForRelTy(unsigned RelTy) const;
   };
 
 } // end llvm namespace