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