1//===-- AVRELFObjectWriter.cpp - AVR ELF Writer ---------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "MCTargetDesc/AVRFixupKinds.h"
10#include "MCTargetDesc/AVRMCAsmInfo.h"
11#include "MCTargetDesc/AVRMCTargetDesc.h"
12
13#include "llvm/MC/MCAssembler.h"
14#include "llvm/MC/MCELFObjectWriter.h"
15#include "llvm/MC/MCExpr.h"
16#include "llvm/MC/MCObjectWriter.h"
17#include "llvm/MC/MCValue.h"
18#include "llvm/Support/ErrorHandling.h"
19
20namespace llvm {
21
22/// Writes AVR machine code into an ELF32 object file.
23class AVRELFObjectWriter : public MCELFObjectTargetWriter {
24public:
25 AVRELFObjectWriter(uint8_t OSABI);
26
27 virtual ~AVRELFObjectWriter() = default;
28
29 unsigned getRelocType(const MCFixup &, const MCValue &,
30 bool IsPCRel) const override;
31};
32
33AVRELFObjectWriter::AVRELFObjectWriter(uint8_t OSABI)
34 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_AVR, true) {}
35
36unsigned AVRELFObjectWriter::getRelocType(const MCFixup &Fixup,
37 const MCValue &Target,
38 bool IsPCRel) const {
39 auto Spec = Target.getSpecifier();
40 switch ((unsigned)Fixup.getKind()) {
41 case FK_Data_1:
42 switch (Spec) {
43 default:
44 llvm_unreachable("Unsupported Modifier");
45 case AVR::S_None:
46 return ELF::R_AVR_8;
47 case AVR::S_DIFF8:
48 return ELF::R_AVR_DIFF8;
49 case AVR::S_LO8:
50 return ELF::R_AVR_8_LO8;
51 case AVR::S_HI8:
52 return ELF::R_AVR_8_HI8;
53 case AVR::S_HH8:
54 return ELF::R_AVR_8_HLO8;
55 }
56 case FK_Data_4:
57 switch (Spec) {
58 default:
59 llvm_unreachable("Unsupported Modifier");
60 case AVR::S_None:
61 return ELF::R_AVR_32;
62 case AVR::S_DIFF32:
63 return ELF::R_AVR_DIFF32;
64 }
65 case FK_Data_2:
66 switch (Spec) {
67 default:
68 llvm_unreachable("Unsupported Modifier");
69 case AVR::S_None:
70 return ELF::R_AVR_16;
71 case AVR::S_AVR_NONE:
72 case AVR::S_PM:
73 return ELF::R_AVR_16_PM;
74 case AVR::S_DIFF16:
75 return ELF::R_AVR_DIFF16;
76 }
77 case AVR::fixup_32:
78 return ELF::R_AVR_32;
79 case AVR::fixup_7_pcrel:
80 return ELF::R_AVR_7_PCREL;
81 case AVR::fixup_13_pcrel:
82 return ELF::R_AVR_13_PCREL;
83 case AVR::fixup_16:
84 return ELF::R_AVR_16;
85 case AVR::fixup_16_pm:
86 return ELF::R_AVR_16_PM;
87 case AVR::fixup_lo8_ldi:
88 return ELF::R_AVR_LO8_LDI;
89 case AVR::fixup_hi8_ldi:
90 return ELF::R_AVR_HI8_LDI;
91 case AVR::fixup_hh8_ldi:
92 return ELF::R_AVR_HH8_LDI;
93 case AVR::fixup_lo8_ldi_neg:
94 return ELF::R_AVR_LO8_LDI_NEG;
95 case AVR::fixup_hi8_ldi_neg:
96 return ELF::R_AVR_HI8_LDI_NEG;
97 case AVR::fixup_hh8_ldi_neg:
98 return ELF::R_AVR_HH8_LDI_NEG;
99 case AVR::fixup_lo8_ldi_pm:
100 return ELF::R_AVR_LO8_LDI_PM;
101 case AVR::fixup_hi8_ldi_pm:
102 return ELF::R_AVR_HI8_LDI_PM;
103 case AVR::fixup_hh8_ldi_pm:
104 return ELF::R_AVR_HH8_LDI_PM;
105 case AVR::fixup_lo8_ldi_pm_neg:
106 return ELF::R_AVR_LO8_LDI_PM_NEG;
107 case AVR::fixup_hi8_ldi_pm_neg:
108 return ELF::R_AVR_HI8_LDI_PM_NEG;
109 case AVR::fixup_hh8_ldi_pm_neg:
110 return ELF::R_AVR_HH8_LDI_PM_NEG;
111 case AVR::fixup_call:
112 return ELF::R_AVR_CALL;
113 case AVR::fixup_ldi:
114 return ELF::R_AVR_LDI;
115 case AVR::fixup_6:
116 return ELF::R_AVR_6;
117 case AVR::fixup_6_adiw:
118 return ELF::R_AVR_6_ADIW;
119 case AVR::fixup_ms8_ldi:
120 return ELF::R_AVR_MS8_LDI;
121 case AVR::fixup_ms8_ldi_neg:
122 return ELF::R_AVR_MS8_LDI_NEG;
123 case AVR::fixup_lo8_ldi_gs:
124 return ELF::R_AVR_LO8_LDI_GS;
125 case AVR::fixup_hi8_ldi_gs:
126 return ELF::R_AVR_HI8_LDI_GS;
127 case AVR::fixup_8:
128 return ELF::R_AVR_8;
129 case AVR::fixup_8_lo8:
130 return ELF::R_AVR_8_LO8;
131 case AVR::fixup_8_hi8:
132 return ELF::R_AVR_8_HI8;
133 case AVR::fixup_8_hlo8:
134 return ELF::R_AVR_8_HLO8;
135 case AVR::fixup_diff8:
136 return ELF::R_AVR_DIFF8;
137 case AVR::fixup_diff16:
138 return ELF::R_AVR_DIFF16;
139 case AVR::fixup_diff32:
140 return ELF::R_AVR_DIFF32;
141 case AVR::fixup_lds_sts_16:
142 return ELF::R_AVR_LDS_STS_16;
143 case AVR::fixup_port6:
144 return ELF::R_AVR_PORT6;
145 case AVR::fixup_port5:
146 return ELF::R_AVR_PORT5;
147 default:
148 llvm_unreachable("invalid fixup kind!");
149 }
150}
151
152std::unique_ptr<MCObjectTargetWriter> createAVRELFObjectWriter(uint8_t OSABI) {
153 return std::make_unique<AVRELFObjectWriter>(args&: OSABI);
154}
155
156} // end of namespace llvm
157