1//===-- ARMELFWriterInfo.cpp - ELF Writer Info for the ARM backend --------===// 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#include "ARMELFWriterInfo.h" 15#include "ARMRelocations.h" 16#include "llvm/Function.h" 17#include "llvm/Support/ErrorHandling.h" 18#include "llvm/Target/TargetData.h" 19#include "llvm/Target/TargetMachine.h" 20#include "llvm/Support/ELF.h" 21 22using namespace llvm; 23 24//===----------------------------------------------------------------------===// 25// Implementation of the ARMELFWriterInfo class 26//===----------------------------------------------------------------------===// 27 28ARMELFWriterInfo::ARMELFWriterInfo(TargetMachine &TM) 29 : TargetELFWriterInfo(TM.getTargetData()->getPointerSizeInBits() == 64, 30 TM.getTargetData()->isLittleEndian()) { 31} 32 33ARMELFWriterInfo::~ARMELFWriterInfo() {} 34 35unsigned ARMELFWriterInfo::getRelocationType(unsigned MachineRelTy) const { 36 switch (MachineRelTy) { 37 case ARM::reloc_arm_absolute: 38 case ARM::reloc_arm_relative: 39 case ARM::reloc_arm_cp_entry: 40 case ARM::reloc_arm_vfp_cp_entry: 41 case ARM::reloc_arm_machine_cp_entry: 42 case ARM::reloc_arm_jt_base: 43 case ARM::reloc_arm_pic_jt: 44 assert(0 && "unsupported ARM relocation type"); break; 45 46 case ARM::reloc_arm_branch: return ELF::R_ARM_CALL; break; 47 case ARM::reloc_arm_movt: return ELF::R_ARM_MOVT_ABS; break; 48 case ARM::reloc_arm_movw: return ELF::R_ARM_MOVW_ABS_NC; break; 49 default: 50 llvm_unreachable("unknown ARM relocation type"); break; 51 } 52 return 0; 53} 54 55long int ARMELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy, 56 long int Modifier) const { 57 assert(0 && "ARMELFWriterInfo::getDefaultAddendForRelTy() not implemented"); 58 return 0; 59} 60 61unsigned ARMELFWriterInfo::getRelocationTySize(unsigned RelTy) const { 62 assert(0 && "ARMELFWriterInfo::getRelocationTySize() not implemented"); 63 return 0; 64} 65 66bool ARMELFWriterInfo::isPCRelativeRel(unsigned RelTy) const { 67 assert(0 && "ARMELFWriterInfo::isPCRelativeRel() not implemented"); 68 return 1; 69} 70 71unsigned ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() const { 72 assert(0 && 73 "ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() not implemented"); 74 return 0; 75} 76 77long int ARMELFWriterInfo::computeRelocation(unsigned SymOffset, 78 unsigned RelOffset, 79 unsigned RelTy) const { 80 assert(0 && 81 "ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() not implemented"); 82 return 0; 83} 84