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      1 //===-- MBlazeELFWriterInfo.h - ELF Writer Info for MBlaze ------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file implements ELF writer information for the MBlaze backend.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef MBLAZE_ELF_WRITER_INFO_H
     15 #define MBLAZE_ELF_WRITER_INFO_H
     16 
     17 #include "llvm/Target/TargetELFWriterInfo.h"
     18 
     19 namespace llvm {
     20   class TargetMachine;
     21 
     22   class MBlazeELFWriterInfo : public TargetELFWriterInfo {
     23   public:
     24     MBlazeELFWriterInfo(TargetMachine &TM);
     25     virtual ~MBlazeELFWriterInfo();
     26 
     27     /// getRelocationType - Returns the target specific ELF Relocation type.
     28     /// 'MachineRelTy' contains the object code independent relocation type
     29     virtual unsigned getRelocationType(unsigned MachineRelTy) const;
     30 
     31     /// hasRelocationAddend - True if the target uses an addend in the
     32     /// ELF relocation entry.
     33     virtual bool hasRelocationAddend() const { return false; }
     34 
     35     /// getDefaultAddendForRelTy - Gets the default addend value for a
     36     /// relocation entry based on the target ELF relocation type.
     37     virtual long int getDefaultAddendForRelTy(unsigned RelTy,
     38                                               long int Modifier = 0) const;
     39 
     40     /// getRelTySize - Returns the size of relocatable field in bits
     41     virtual unsigned getRelocationTySize(unsigned RelTy) const;
     42 
     43     /// isPCRelativeRel - True if the relocation type is pc relative
     44     virtual bool isPCRelativeRel(unsigned RelTy) const;
     45 
     46     /// getJumpTableRelocationTy - Returns the machine relocation type used
     47     /// to reference a jumptable.
     48     virtual unsigned getAbsoluteLabelMachineRelTy() const;
     49 
     50     /// computeRelocation - Some relocatable fields could be relocated
     51     /// directly, avoiding the relocation symbol emission, compute the
     52     /// final relocation value for this symbol.
     53     virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
     54                                        unsigned RelTy) const;
     55   };
     56 
     57 } // end llvm namespace
     58 
     59 #endif // MBLAZE_ELF_WRITER_INFO_H
     60