arm-mc-elf-s07-tew

include/llvm/Target/TargetELFWriterInfo.h

Index: include/llvm/Target/TargetELFWriterInfo.h
===================================================================
--- a/include/llvm/Target/TargetELFWriterInfo.h
+++ b/include/llvm/Target/TargetELFWriterInfo.h
@@ -14,11 +14,14 @@
 #ifndef LLVM_TARGET_TARGETELFWRITERINFO_H
 #define LLVM_TARGET_TARGETELFWRITERINFO_H
 
+#include "llvm/System/DataTypes.h"
+
 namespace llvm {
   class Function;
   class TargetData;
   class TargetMachine;
   class MachineRelocation;
+  class TargetELFRelocHelper;
   class BinaryObject;
   //===--------------------------------------------------------------------===//
   //                          TargetELFWriterInfo
@@ -119,8 +122,25 @@
     /// final relocation value for this symbol.
     virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
                                        unsigned RelTy) const = 0;
+
+    // In certain architectures, nontrivial relocations require
+    // peeking into the actual instructions in the stream for patching
+    // purposes.
+    
+    virtual TargetELFRelocHelper *getRelocHelper() const;
   };
 
+  // This class isolates the arch-specific rules for
+  // emitting nontrivial intra-section relocations.
+  // This is a no-op in most architectures (e.g. x86)
+  // This class is NOT a no-op in ARM/ELF
+  class TargetELFRelocHelper {
+  public:
+    virtual ~TargetELFRelocHelper();
+    virtual void RelocateField(BinaryObject &BO, uint32_t Offset,
+                               int64_t Value, unsigned Size,
+                               const MachineRelocation &MR);
+  };
 } // end llvm namespace
 
 #endif // LLVM_TARGET_TARGETELFWRITERINFO_H