| //===- MCSectionCOFF.h - COFF Machine Code Sections -------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file declares the MCSectionCOFF class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCSECTIONCOFF_H |
| #define LLVM_MC_MCSECTIONCOFF_H |
| |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/MC/MCSection.h" |
| #include "llvm/Support/COFF.h" |
| |
| namespace llvm { |
| class MCSymbol; |
| |
| /// MCSectionCOFF - This represents a section on Windows |
| class MCSectionCOFF : public MCSection { |
| // The memory for this string is stored in the same MCContext as *this. |
| StringRef SectionName; |
| |
| // FIXME: The following fields should not be mutable, but are for now so |
| // the asm parser can honor the .linkonce directive. |
| |
| /// Characteristics - This is the Characteristics field of a section, |
| /// drawn from the enums below. |
| mutable unsigned Characteristics; |
| |
| /// The COMDAT symbol of this section. Only valid if this is a COMDAT |
| /// section. Two COMDAT sections are merged if they have the same |
| /// COMDAT symbol. |
| MCSymbol *COMDATSymbol; |
| |
| /// Selection - This is the Selection field for the section symbol, if |
| /// it is a COMDAT section (Characteristics & IMAGE_SCN_LNK_COMDAT) != 0 |
| mutable int Selection; |
| |
| private: |
| friend class MCContext; |
| MCSectionCOFF(StringRef Section, unsigned Characteristics, |
| MCSymbol *COMDATSymbol, int Selection, SectionKind K) |
| : MCSection(SV_COFF, K), SectionName(Section), |
| Characteristics(Characteristics), COMDATSymbol(COMDATSymbol), |
| Selection(Selection) { |
| assert ((Characteristics & 0x00F00000) == 0 && |
| "alignment must not be set upon section creation"); |
| } |
| ~MCSectionCOFF(); |
| |
| public: |
| /// ShouldOmitSectionDirective - Decides whether a '.section' directive |
| /// should be printed before the section name |
| bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; |
| |
| StringRef getSectionName() const { return SectionName; } |
| std::string getLabelBeginName() const override { |
| return SectionName.str() + "_begin"; |
| } |
| std::string getLabelEndName() const override { |
| return SectionName.str() + "_end"; |
| } |
| unsigned getCharacteristics() const { return Characteristics; } |
| MCSymbol *getCOMDATSymbol() const { return COMDATSymbol; } |
| int getSelection() const { return Selection; } |
| |
| void setSelection(int Selection) const; |
| |
| void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS, |
| const MCExpr *Subsection) const override; |
| bool UseCodeAlign() const override; |
| bool isVirtualSection() const override; |
| |
| static bool classof(const MCSection *S) { |
| return S->getVariant() == SV_COFF; |
| } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |