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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
//===- MCSectionELF.h - ELF Machine Code Sections ---------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the MCSectionELF class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCSECTIONELF_H
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#define LLVM_MC_MCSECTIONELF_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCSymbolELF.h"
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#include "llvm/MC/SectionKind.h"
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namespace llvm {
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class MCSymbol;
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/// This represents a section on linux, lots of unix variants and some bare
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/// metal systems.
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class MCSectionELF final : public MCSection {
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/// This is the name of the section. The referenced memory is owned by
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/// TargetLoweringObjectFileELF's ELFUniqueMap.
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StringRef SectionName;
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/// This is the sh_type field of a section, drawn from the enums below.
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unsigned Type;
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/// This is the sh_flags field of a section, drawn from the enums below.
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unsigned Flags;
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unsigned UniqueID;
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/// The size of each entry in this section. This size only makes sense for
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/// sections that contain fixed-sized entries. If a section does not contain
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/// fixed-sized entries 'EntrySize' will be 0.
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unsigned EntrySize;
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const MCSymbolELF *Group;
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/// sh_info for SHF_LINK_ORDER (can be null).
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const MCSymbol *AssociatedSymbol;
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private:
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friend class MCContext;
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MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K,
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unsigned entrySize, const MCSymbolELF *group, unsigned UniqueID,
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MCSymbol *Begin, const MCSymbolELF *AssociatedSymbol)
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: MCSection(SV_ELF, K, Begin), SectionName(Section), Type(type),
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Flags(flags), UniqueID(UniqueID), EntrySize(entrySize), Group(group),
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AssociatedSymbol(AssociatedSymbol) {
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if (Group)
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Group->setIsSignature();
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}
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void setSectionName(StringRef Name) { SectionName = Name; }
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public:
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~MCSectionELF();
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/// Decides whether a '.section' directive should be printed before the
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/// section name
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bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
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StringRef getSectionName() const { return SectionName; }
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unsigned getType() const { return Type; }
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unsigned getFlags() const { return Flags; }
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unsigned getEntrySize() const { return EntrySize; }
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void setFlags(unsigned F) { Flags = F; }
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const MCSymbolELF *getGroup() const { return Group; }
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void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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raw_ostream &OS,
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const MCExpr *Subsection) const override;
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bool UseCodeAlign() const override;
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bool isVirtualSection() const override;
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bool isUnique() const { return UniqueID != ~0U; }
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unsigned getUniqueID() const { return UniqueID; }
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const MCSection *getAssociatedSection() const { return &AssociatedSymbol->getSection(); }
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const MCSymbol *getAssociatedSymbol() const { return AssociatedSymbol; }
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static bool classof(const MCSection *S) {
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return S->getVariant() == SV_ELF;
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}
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};
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} // end namespace llvm
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#endif // LLVM_MC_MCSECTIONELF_H
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