//===- 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. const 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; /// Assoc - This is name of the associated section, if it is a COMDAT /// section (Characteristics & IMAGE_SCN_LNK_COMDAT) != 0 with an /// associative Selection (IMAGE_COMDAT_SELECT_ASSOCIATIVE). mutable const MCSectionCOFF *Assoc; private: friend class MCContext; MCSectionCOFF(StringRef Section, unsigned Characteristics, const MCSymbol *COMDATSymbol, int Selection, const MCSectionCOFF *Assoc, SectionKind K) : MCSection(SV_COFF, K), SectionName(Section), Characteristics(Characteristics), COMDATSymbol(COMDATSymbol), Selection(Selection), Assoc(Assoc) { assert ((Characteristics & 0x00F00000) == 0 && "alignment must not be set upon section creation"); assert ((Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) == (Assoc != 0) && "associative COMDAT section must have an associated section"); } ~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; } virtual std::string getLabelBeginName() const { return SectionName.str() + "_begin"; } virtual std::string getLabelEndName() const { return SectionName.str() + "_end"; } unsigned getCharacteristics() const { return Characteristics; } int getSelection() const { return Selection; } const MCSectionCOFF *getAssocSection() const { return Assoc; } void setSelection(int Selection, const MCSectionCOFF *Assoc = 0) const; virtual void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS, const MCExpr *Subsection) const; virtual bool UseCodeAlign() const; virtual bool isVirtualSection() const; static bool classof(const MCSection *S) { return S->getVariant() == SV_COFF; } }; } // end namespace llvm #endif