1 //===-- X86ELFWriterInfo.h - ELF Writer Info for X86 ------------*- 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 X86 backend. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef X86_ELF_WRITER_INFO_H 15 #define X86_ELF_WRITER_INFO_H 16 17 #include "llvm/Target/TargetELFWriterInfo.h" 18 19 namespace llvm { 20 21 class X86ELFWriterInfo : public TargetELFWriterInfo { 22 23 public: 24 X86ELFWriterInfo(bool is64Bit_, bool isLittleEndian_); 25 virtual ~X86ELFWriterInfo(); 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 is64Bit ? true : 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 // X86_ELF_WRITER_INFO_H 60
