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    llvm_unreachable("unsupported ARM relocation type");
45
46  case ARM::reloc_arm_branch: return ELF::R_ARM_CALL;
47  case ARM::reloc_arm_movt:   return ELF::R_ARM_MOVT_ABS;
48  case ARM::reloc_arm_movw:   return ELF::R_ARM_MOVW_ABS_NC;
49  default:
50    llvm_unreachable("unknown ARM relocation type");
51  }
52}
53
54long int ARMELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
55                                                    long int Modifier) const {
56  llvm_unreachable("ARMELFWriterInfo::getDefaultAddendForRelTy() not "
57                   "implemented");
58}
59
60unsigned ARMELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
61  llvm_unreachable("ARMELFWriterInfo::getRelocationTySize() not implemented");
62}
63
64bool ARMELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
65  llvm_unreachable("ARMELFWriterInfo::isPCRelativeRel() not implemented");
66}
67
68unsigned ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
69  llvm_unreachable("ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() not "
70                   "implemented");
71}
72
73long int ARMELFWriterInfo::computeRelocation(unsigned SymOffset,
74                                             unsigned RelOffset,
75                                             unsigned RelTy) const {
76  llvm_unreachable("ARMELFWriterInfo::getAbsoluteLabelMachineRelTy() not "
77                   "implemented");
78}
79