1 //===- MCSectionCOFF.h - COFF Machine Code Sections -------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the MCSectionCOFF class. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_MC_MCSECTIONCOFF_H 15 #define LLVM_MC_MCSECTIONCOFF_H 16 17 #include "llvm/ADT/StringRef.h" 18 #include "llvm/MC/MCSection.h" 19 #include "llvm/Support/COFF.h" 20 21 namespace llvm { 22 23 /// MCSectionCOFF - This represents a section on Windows 24 class MCSectionCOFF : public MCSection { 25 // The memory for this string is stored in the same MCContext as *this. 26 StringRef SectionName; 27 28 /// Characteristics - This is the Characteristics field of a section, 29 // drawn from the enums below. 30 unsigned Characteristics; 31 32 /// Selection - This is the Selection field for the section symbol, if 33 /// it is a COMDAT section (Characteristics & IMAGE_SCN_LNK_COMDAT) != 0 34 int Selection; 35 36 private: 37 friend class MCContext; MCSectionCOFF(StringRef Section,unsigned Characteristics,int Selection,SectionKind K)38 MCSectionCOFF(StringRef Section, unsigned Characteristics, 39 int Selection, SectionKind K) 40 : MCSection(SV_COFF, K), SectionName(Section), 41 Characteristics(Characteristics), Selection (Selection) { 42 assert ((Characteristics & 0x00F00000) == 0 && 43 "alignment must not be set upon section creation"); 44 } 45 ~MCSectionCOFF(); 46 47 public: 48 /// ShouldOmitSectionDirective - Decides whether a '.section' directive 49 /// should be printed before the section name 50 bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; 51 getSectionName()52 StringRef getSectionName() const { return SectionName; } getLabelBeginName()53 virtual std::string getLabelBeginName() const { 54 return SectionName.str() + "_begin"; 55 } getLabelEndName()56 virtual std::string getLabelEndName() const { 57 return SectionName.str() + "_end"; 58 } getCharacteristics()59 unsigned getCharacteristics() const { return Characteristics; } getSelection()60 int getSelection () const { return Selection; } 61 62 virtual void PrintSwitchToSection(const MCAsmInfo &MAI, 63 raw_ostream &OS) const; 64 virtual bool UseCodeAlign() const; 65 virtual bool isVirtualSection() const; 66 classof(const MCSection * S)67 static bool classof(const MCSection *S) { 68 return S->getVariant() == SV_COFF; 69 } 70 }; 71 72 } // end namespace llvm 73 74 #endif 75