| //===- MCSectionWasm.h - Wasm Machine Code Sections -------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the MCSectionWasm class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCSECTIONWASM_H |
| #define LLVM_MC_MCSECTIONWASM_H |
| |
| #include "llvm/MC/MCSection.h" |
| |
| namespace llvm { |
| |
| class MCSymbol; |
| class MCSymbolWasm; |
| class StringRef; |
| class raw_ostream; |
| |
| /// This represents a section on wasm. |
| class MCSectionWasm final : public MCSection { |
| unsigned UniqueID; |
| |
| const MCSymbolWasm *Group; |
| |
| // The offset of the MC function/data section in the wasm code/data section. |
| // For data relocations the offset is relative to start of the data payload |
| // itself and does not include the size of the section header. |
| uint64_t SectionOffset = 0; |
| |
| // For data sections, this is the index of of the corresponding wasm data |
| // segment |
| uint32_t SegmentIndex = 0; |
| |
| // For data sections, whether to use a passive segment |
| bool IsPassive = false; |
| |
| // For data sections, bitfield of WasmSegmentFlag |
| unsigned SegmentFlags; |
| |
| // The storage of Name is owned by MCContext's WasmUniquingMap. |
| friend class MCContext; |
| MCSectionWasm(StringRef Name, SectionKind K, unsigned SegmentFlags, |
| const MCSymbolWasm *Group, unsigned UniqueID, MCSymbol *Begin) |
| : MCSection(SV_Wasm, Name, K, Begin), UniqueID(UniqueID), Group(Group), |
| SegmentFlags(SegmentFlags) {} |
| |
| public: |
| /// Decides whether a '.section' directive should be printed before the |
| /// section name |
| bool shouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; |
| |
| const MCSymbolWasm *getGroup() const { return Group; } |
| unsigned getSegmentFlags() const { return SegmentFlags; } |
| |
| void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, |
| raw_ostream &OS, |
| const MCExpr *Subsection) const override; |
| bool UseCodeAlign() const override; |
| bool isVirtualSection() const override; |
| |
| bool isWasmData() const { |
| return Kind.isGlobalWriteableData() || Kind.isReadOnly() || |
| Kind.isThreadLocal(); |
| } |
| |
| bool isUnique() const { return UniqueID != ~0U; } |
| unsigned getUniqueID() const { return UniqueID; } |
| |
| uint64_t getSectionOffset() const { return SectionOffset; } |
| void setSectionOffset(uint64_t Offset) { SectionOffset = Offset; } |
| |
| uint32_t getSegmentIndex() const { return SegmentIndex; } |
| void setSegmentIndex(uint32_t Index) { SegmentIndex = Index; } |
| |
| bool getPassive() const { |
| assert(isWasmData()); |
| return IsPassive; |
| } |
| void setPassive(bool V = true) { |
| assert(isWasmData()); |
| IsPassive = V; |
| } |
| static bool classof(const MCSection *S) { return S->getVariant() == SV_Wasm; } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |