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