1 //===- MCSectionWasm.h - Wasm Machine Code Sections -------------*- C++ -*-===//
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 declares the MCSectionWasm class.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_MC_MCSECTIONWASM_H
15 #define LLVM_MC_MCSECTIONWASM_H
17 #include "llvm/ADT/Twine.h"
18 #include "llvm/MC/MCSection.h"
19 #include "llvm/MC/MCSymbolWasm.h"
20 #include "llvm/Support/Debug.h"
21 #include "llvm/Support/raw_ostream.h"
27 /// This represents a section on wasm.
28 class MCSectionWasm final : public MCSection {
31 /// This is the name of the section. The referenced memory is owned by
32 /// TargetLoweringObjectFileWasm's WasmUniqueMap.
33 StringRef SectionName;
37 const MCSymbolWasm *Group;
39 // The offset of the MC function/data section in the wasm code/data section.
40 // For data relocations the offset is relative to start of the data payload
41 // itself and does not include the size of the section header.
42 uint64_t SectionOffset;
44 // For data sections, this is the offset of the corresponding wasm data
46 uint64_t MemoryOffset;
48 friend class MCContext;
49 MCSectionWasm(StringRef Section, SectionKind K, const MCSymbolWasm *group,
50 unsigned UniqueID, MCSymbol *Begin)
51 : MCSection(SV_Wasm, K, Begin), SectionName(Section), UniqueID(UniqueID),
52 Group(group), SectionOffset(0) {}
54 void setSectionName(StringRef Name) { SectionName = Name; }
59 /// Decides whether a '.section' directive should be printed before the
61 bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
63 StringRef getSectionName() const { return SectionName; }
64 const MCSymbolWasm *getGroup() const { return Group; }
66 void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
68 const MCExpr *Subsection) const override;
69 bool UseCodeAlign() const override;
70 bool isVirtualSection() const override;
72 bool isWasmData() const {
73 return Kind.isGlobalWriteableData() || Kind.isReadOnly();
76 bool isUnique() const { return UniqueID != ~0U; }
77 unsigned getUniqueID() const { return UniqueID; }
79 uint64_t getSectionOffset() const { return SectionOffset; }
80 void setSectionOffset(uint64_t Offset) { SectionOffset = Offset; }
82 uint32_t getMemoryOffset() const { return MemoryOffset; }
83 void setMemoryOffset(uint32_t Offset) { MemoryOffset = Offset; }
85 static bool classof(const MCSection *S) { return S->getVariant() == SV_Wasm; }
88 } // end namespace llvm