the various ConstantExpr::get*Ty methods existed to work with issues around
[llvm/stm8.git] / lib / Target / MBlaze / MBlazeELFWriterInfo.cpp
blob3f26ed15b284e6095e9b67dcd564471003637db1
1 //===-- MBlazeELFWriterInfo.cpp - ELF Writer Info for the MBlaze 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 MBlaze backend.
12 //===----------------------------------------------------------------------===//
14 #include "MBlazeELFWriterInfo.h"
15 #include "MBlazeRelocations.h"
16 #include "llvm/Function.h"
17 #include "llvm/Support/ELF.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Target/TargetData.h"
20 #include "llvm/Target/TargetMachine.h"
22 using namespace llvm;
24 //===----------------------------------------------------------------------===//
25 // Implementation of the MBlazeELFWriterInfo class
26 //===----------------------------------------------------------------------===//
28 MBlazeELFWriterInfo::MBlazeELFWriterInfo(TargetMachine &TM)
29 : TargetELFWriterInfo(TM.getTargetData()->getPointerSizeInBits() == 64,
30 TM.getTargetData()->isLittleEndian()) {
33 MBlazeELFWriterInfo::~MBlazeELFWriterInfo() {}
35 unsigned MBlazeELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
36 switch (MachineRelTy) {
37 case MBlaze::reloc_pcrel_word:
38 return ELF::R_MICROBLAZE_64_PCREL;
39 case MBlaze::reloc_absolute_word:
40 return ELF::R_MICROBLAZE_NONE;
41 default:
42 llvm_unreachable("unknown mblaze machine relocation type");
44 return 0;
47 long int MBlazeELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
48 long int Modifier) const {
49 switch (RelTy) {
50 case ELF::R_MICROBLAZE_32_PCREL:
51 return Modifier - 4;
52 case ELF::R_MICROBLAZE_32:
53 return Modifier;
54 default:
55 llvm_unreachable("unknown mblaze relocation type");
57 return 0;
60 unsigned MBlazeELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
61 // FIXME: Most of these sizes are guesses based on the name
62 switch (RelTy) {
63 case ELF::R_MICROBLAZE_32:
64 case ELF::R_MICROBLAZE_32_PCREL:
65 case ELF::R_MICROBLAZE_32_PCREL_LO:
66 case ELF::R_MICROBLAZE_32_LO:
67 case ELF::R_MICROBLAZE_SRO32:
68 case ELF::R_MICROBLAZE_SRW32:
69 case ELF::R_MICROBLAZE_32_SYM_OP_SYM:
70 case ELF::R_MICROBLAZE_GOTOFF_32:
71 return 32;
73 case ELF::R_MICROBLAZE_64_PCREL:
74 case ELF::R_MICROBLAZE_64:
75 case ELF::R_MICROBLAZE_GOTPC_64:
76 case ELF::R_MICROBLAZE_GOT_64:
77 case ELF::R_MICROBLAZE_PLT_64:
78 case ELF::R_MICROBLAZE_GOTOFF_64:
79 return 64;
82 return 0;
85 bool MBlazeELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
86 // FIXME: Most of these are guesses based on the name
87 switch (RelTy) {
88 case ELF::R_MICROBLAZE_32_PCREL:
89 case ELF::R_MICROBLAZE_64_PCREL:
90 case ELF::R_MICROBLAZE_32_PCREL_LO:
91 case ELF::R_MICROBLAZE_GOTPC_64:
92 return true;
95 return false;
98 unsigned MBlazeELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
99 return MBlaze::reloc_absolute_word;
102 long int MBlazeELFWriterInfo::computeRelocation(unsigned SymOffset,
103 unsigned RelOffset,
104 unsigned RelTy) const {
105 if (RelTy == ELF::R_MICROBLAZE_32_PCREL || ELF::R_MICROBLAZE_64_PCREL)
106 return SymOffset - (RelOffset + 4);
107 else
108 assert("computeRelocation unknown for this relocation type");
110 return 0;