LLVM: lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp Source File (original) (raw)
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17#include
18#include
19
20using namespace llvm;
21
22namespace {
23
25public:
26 BPFAsmBackend(llvm::endianness Endian) : MCAsmBackend(Endian) {}
27 ~BPFAsmBackend() override = default;
28
29 void applyFixup(const MCFragment &, const MCFixup &, const MCValue &Target,
30 uint8_t *Data, uint64_t Value, bool IsResolved) override;
31
32 std::unique_ptr
33 createObjectTargetWriter() const override;
34
35 MCFixupKindInfo getFixupKindInfo(MCFixupKind Kind) const override;
36
37 bool writeNopData(raw_ostream &OS, uint64_t Count,
38 const MCSubtargetInfo *STI) const override;
39};
40
41}
42
45 {"FK_BPF_PCRel_4", 0, 32, 0},
46 };
47
50
52 "Invalid kind!");
54}
55
56bool BPFAsmBackend::writeNopData(raw_ostream &OS, uint64_t Count,
57 const MCSubtargetInfo *STI) const {
58 if ((Count % 8) != 0)
59 return false;
60
61 for (uint64_t i = 0; i < Count; i += 8)
63
64 return true;
65}
66
67void BPFAsmBackend::applyFixup(const MCFragment &F, const MCFixup &Fixup,
68 const MCValue &Target, uint8_t *Data,
69 uint64_t Value, bool IsResolved) {
70 maybeAddReloc(F, Fixup, Target, Value, IsResolved);
72
73
76 Endian);
84 Data[1] = 0x10;
86 } else {
87 Data[1] = 0x1;
89 }
91
94 } else {
96
97 int64_t ByteOff = (int64_t)Value - 8;
98 if (ByteOff > INT16_MAX * 8 || ByteOff < INT16_MIN * 8)
100
103 }
104}
105
106std::unique_ptr
107BPFAsmBackend::createObjectTargetWriter() const {
109}
110
117
unsigned const MachineRegisterInfo * MRI
assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")
PowerPC TLS Dynamic Call Fixup
Generic interface to target specific assembler backends.
virtual MCFixupKindInfo getFixupKindInfo(MCFixupKind Kind) const
Get information on a fixup kind.
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
Generic base class for all target subtargets.
Target - Wrapper for Target specific information.
Error applyFixup(LinkGraph &G, Block &B, const Edge &E, const ArmConfig &ArmCfg)
Apply fixup expression for edge to block content.
void write32le(void *P, uint32_t V)
void write32be(void *P, uint32_t V)
void write(void *memory, value_type value, endianness endian)
Write a value to memory with a particular endianness.
This is an optimization pass for GlobalISel generic memory operations.
FunctionAddr VTableAddr Value
MCAsmBackend * createBPFAsmBackend(const Target &T, const MCSubtargetInfo &STI, const MCRegisterInfo &MRI, const MCTargetOptions &Options)
Definition BPFAsmBackend.cpp:111
uint16_t MCFixupKind
Extensible enumeration to represent the type of a fixup.
MCAsmBackend * createBPFbeAsmBackend(const Target &T, const MCSubtargetInfo &STI, const MCRegisterInfo &MRI, const MCTargetOptions &Options)
Definition BPFAsmBackend.cpp:118
LLVM_ABI void report_fatal_error(Error Err, bool gen_crash_diag=true)
FunctionAddr VTableAddr Count
@ FK_Data_8
A eight-byte fixup.
@ FK_Data_4
A four-byte fixup.
@ FK_SecRel_8
A eight-byte section relative fixup.
@ FK_Data_2
A two-byte fixup.
FunctionAddr VTableAddr uintptr_t uintptr_t Data
std::unique_ptr< MCObjectTargetWriter > createBPFELFObjectWriter(uint8_t OSABI)
Target independent information on a fixup kind.