1 //===-- MBlazeELFWriterInfo.cpp - ELF Writer Info for the MBlaze backend --===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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"
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
;
42 llvm_unreachable("unknown mblaze machine relocation type");
47 long int MBlazeELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy
,
48 long int Modifier
) const {
50 case ELF::R_MICROBLAZE_32_PCREL
:
52 case ELF::R_MICROBLAZE_32
:
55 llvm_unreachable("unknown mblaze relocation type");
60 unsigned MBlazeELFWriterInfo::getRelocationTySize(unsigned RelTy
) const {
61 // FIXME: Most of these sizes are guesses based on the name
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
:
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
:
85 bool MBlazeELFWriterInfo::isPCRelativeRel(unsigned RelTy
) const {
86 // FIXME: Most of these are guesses based on the name
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
:
98 unsigned MBlazeELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
99 return MBlaze::reloc_absolute_word
;
102 long int MBlazeELFWriterInfo::computeRelocation(unsigned SymOffset
,
104 unsigned RelTy
) const {
105 if (RelTy
== ELF::R_MICROBLAZE_32_PCREL
|| ELF::R_MICROBLAZE_64_PCREL
)
106 return SymOffset
- (RelOffset
+ 4);
108 assert("computeRelocation unknown for this relocation type");