1317017Sdim//===- MCSectionWasm.h - Wasm Machine Code Sections -------------*- C++ -*-===// 2317017Sdim// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6317017Sdim// 7317017Sdim//===----------------------------------------------------------------------===// 8317017Sdim// 9317017Sdim// This file declares the MCSectionWasm class. 10317017Sdim// 11317017Sdim//===----------------------------------------------------------------------===// 12317017Sdim 13317017Sdim#ifndef LLVM_MC_MCSECTIONWASM_H 14317017Sdim#define LLVM_MC_MCSECTIONWASM_H 15317017Sdim 16317017Sdim#include "llvm/ADT/Twine.h" 17317017Sdim#include "llvm/MC/MCSection.h" 18317017Sdim#include "llvm/MC/MCSymbolWasm.h" 19317017Sdim#include "llvm/Support/Debug.h" 20317017Sdim#include "llvm/Support/raw_ostream.h" 21317017Sdim 22317017Sdimnamespace llvm { 23317017Sdim 24317017Sdimclass MCSymbol; 25317017Sdim 26317017Sdim/// This represents a section on wasm. 27317017Sdimclass MCSectionWasm final : public MCSection { 28317017Sdim /// This is the name of the section. The referenced memory is owned by 29317017Sdim /// TargetLoweringObjectFileWasm's WasmUniqueMap. 30317017Sdim StringRef SectionName; 31317017Sdim 32317017Sdim unsigned UniqueID; 33317017Sdim 34317017Sdim const MCSymbolWasm *Group; 35317017Sdim 36317778Sdim // The offset of the MC function/data section in the wasm code/data section. 37317778Sdim // For data relocations the offset is relative to start of the data payload 38317778Sdim // itself and does not include the size of the section header. 39341825Sdim uint64_t SectionOffset = 0; 40317017Sdim 41341825Sdim // For data sections, this is the index of of the corresponding wasm data 42327952Sdim // segment 43341825Sdim uint32_t SegmentIndex = 0; 44327952Sdim 45353358Sdim // Whether this data segment is passive 46353358Sdim bool IsPassive = false; 47353358Sdim 48317017Sdim friend class MCContext; 49327952Sdim MCSectionWasm(StringRef Section, SectionKind K, const MCSymbolWasm *group, 50327952Sdim unsigned UniqueID, MCSymbol *Begin) 51327952Sdim : MCSection(SV_Wasm, K, Begin), SectionName(Section), UniqueID(UniqueID), 52341825Sdim Group(group) {} 53317017Sdim 54317017Sdimpublic: 55317017Sdim /// Decides whether a '.section' directive should be printed before the 56317017Sdim /// section name 57353358Sdim bool shouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; 58317017Sdim 59317017Sdim StringRef getSectionName() const { return SectionName; } 60317017Sdim const MCSymbolWasm *getGroup() const { return Group; } 61317017Sdim 62317017Sdim void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, 63317017Sdim raw_ostream &OS, 64317017Sdim const MCExpr *Subsection) const override; 65317017Sdim bool UseCodeAlign() const override; 66317017Sdim bool isVirtualSection() const override; 67317017Sdim 68327952Sdim bool isWasmData() const { 69353358Sdim return Kind.isGlobalWriteableData() || Kind.isReadOnly() || 70353358Sdim Kind.isThreadLocal(); 71327952Sdim } 72327952Sdim 73317017Sdim bool isUnique() const { return UniqueID != ~0U; } 74317017Sdim unsigned getUniqueID() const { return UniqueID; } 75317017Sdim 76317017Sdim uint64_t getSectionOffset() const { return SectionOffset; } 77317017Sdim void setSectionOffset(uint64_t Offset) { SectionOffset = Offset; } 78317017Sdim 79341825Sdim uint32_t getSegmentIndex() const { return SegmentIndex; } 80341825Sdim void setSegmentIndex(uint32_t Index) { SegmentIndex = Index; } 81327952Sdim 82353358Sdim bool getPassive() const { 83353358Sdim assert(isWasmData()); 84353358Sdim return IsPassive; 85353358Sdim } 86353358Sdim void setPassive(bool V = true) { 87353358Sdim assert(isWasmData()); 88353358Sdim IsPassive = V; 89353358Sdim } 90317017Sdim static bool classof(const MCSection *S) { return S->getVariant() == SV_Wasm; } 91317017Sdim}; 92317017Sdim 93317017Sdim} // end namespace llvm 94317017Sdim 95317017Sdim#endif 96