LLVM 22.0.0git
AVRELFObjectWriter.cpp
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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
12
13#include "llvm/MC/MCAssembler.h"
15#include "llvm/MC/MCExpr.h"
17#include "llvm/MC/MCValue.h"
19
20namespace llvm {
21
22/// Writes AVR machine code into an ELF32 object file.
24public:
26
27 virtual ~AVRELFObjectWriter() = default;
28
29 unsigned getRelocType(const MCFixup &, const MCValue &,
30 bool IsPCRel) const override;
31};
32
34 : MCELFObjectTargetWriter(false, OSABI, ELF::EM_AVR, true) {}
35
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;
80 return ELF::R_AVR_7_PCREL;
82 return ELF::R_AVR_13_PCREL;
83 case AVR::fixup_16:
84 return ELF::R_AVR_16;
86 return ELF::R_AVR_16_PM;
88 return ELF::R_AVR_LO8_LDI;
90 return ELF::R_AVR_HI8_LDI;
92 return ELF::R_AVR_HH8_LDI;
94 return ELF::R_AVR_LO8_LDI_NEG;
96 return ELF::R_AVR_HI8_LDI_NEG;
98 return ELF::R_AVR_HH8_LDI_NEG;
100 return ELF::R_AVR_LO8_LDI_PM;
102 return ELF::R_AVR_HI8_LDI_PM;
104 return ELF::R_AVR_HH8_LDI_PM;
106 return ELF::R_AVR_LO8_LDI_PM_NEG;
108 return ELF::R_AVR_HI8_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;
118 return ELF::R_AVR_6_ADIW;
120 return ELF::R_AVR_MS8_LDI;
122 return ELF::R_AVR_MS8_LDI_NEG;
124 return ELF::R_AVR_LO8_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;
134 return ELF::R_AVR_8_HLO8;
135 case AVR::fixup_diff8:
136 return ELF::R_AVR_DIFF8;
138 return ELF::R_AVR_DIFF16;
140 return ELF::R_AVR_DIFF32;
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>(OSABI);
154}
155
156} // end of namespace llvm
PowerPC TLS Dynamic Call Fixup
Writes AVR machine code into an ELF32 object file.
unsigned getRelocType(const MCFixup &, const MCValue &, bool IsPCRel) const override
virtual ~AVRELFObjectWriter()=default
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:61
Target - Wrapper for Target specific information.
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ S_LO8
Corresponds to lo8().
Definition: AVRMCAsmInfo.h:42
@ S_HH8
Corresponds to hlo8() and hh8().
Definition: AVRMCAsmInfo.h:43
@ S_PM
Corresponds to pm(), reference to program memory.
Definition: AVRMCAsmInfo.h:46
@ S_HI8
Corresponds to hi8().
Definition: AVRMCAsmInfo.h:41
@ fixup_16_pm
A 16-bit program memory address.
Definition: AVRFixupKinds.h:46
@ fixup_16
A 16-bit address.
Definition: AVRFixupKinds.h:44
@ fixup_call
A 22-bit fixup for the target of a CALL k or JMP k instruction.
@ fixup_hh8_ldi
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a 24-bit value ...
Definition: AVRFixupKinds.h:59
@ fixup_ms8_ldi_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a negated 32-bi...
Definition: AVRFixupKinds.h:75
@ fixup_32
A 32-bit AVR fixup.
Definition: AVRFixupKinds.h:28
@ fixup_lo8_ldi_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the lower 8 bits of a negated 16-bi...
Definition: AVRFixupKinds.h:66
@ fixup_6_adiw
A symbol+addr fixup for the `LDD <x>+<n>, <r>" family of instructions.
@ fixup_ms8_ldi
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a 32-bit value ...
Definition: AVRFixupKinds.h:62
@ fixup_7_pcrel
A 7-bit PC-relative fixup for the family of conditional branches which take 7-bit targets (BRNE,...
Definition: AVRFixupKinds.h:32
@ fixup_ldi
Replaces the 8-bit immediate with another value.
Definition: AVRFixupKinds.h:49
@ fixup_lo8_ldi
Replaces the immediate operand of a 16-bit Rd, K instruction with the lower 8 bits of a 16-bit value ...
Definition: AVRFixupKinds.h:53
@ fixup_hi8_ldi_pm_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a negated 16-bi...
Definition: AVRFixupKinds.h:96
@ fixup_hi8_ldi
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a 16-bit value ...
Definition: AVRFixupKinds.h:56
@ fixup_lo8_ldi_pm
Replaces the immediate operand of a 16-bit Rd, K instruction with the lower 8 bits of a 16-bit progra...
Definition: AVRFixupKinds.h:79
@ fixup_port6
A 6-bit port address.
@ fixup_hh8_ldi_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a negated 24-bi...
Definition: AVRFixupKinds.h:72
@ fixup_hh8_ldi_pm
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a 24-bit progra...
Definition: AVRFixupKinds.h:87
@ fixup_port5
A 5-bit port address.
@ fixup_lo8_ldi_pm_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the lower 8 bits of a negated 16-bi...
Definition: AVRFixupKinds.h:92
@ fixup_hi8_ldi_pm
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a 16-bit progra...
Definition: AVRFixupKinds.h:83
@ fixup_hh8_ldi_pm_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a negated 24-bi...
@ fixup_13_pcrel
A 12-bit PC-relative fixup for the family of branches which take 12-bit targets (RJMP,...
Definition: AVRFixupKinds.h:41
@ fixup_hi8_ldi_neg
Replaces the immediate operand of a 16-bit Rd, K instruction with the upper 8 bits of a negated 16-bi...
Definition: AVRFixupKinds.h:69
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ FK_Data_1
A one-byte fixup.
Definition: MCFixup.h:34
@ FK_Data_4
A four-byte fixup.
Definition: MCFixup.h:36
@ FK_Data_2
A two-byte fixup.
Definition: MCFixup.h:35
std::unique_ptr< MCObjectTargetWriter > createAVRELFObjectWriter(uint8_t OSABI)
Creates an ELF object writer for AVR.