include/llvm/MC/MCSectionCOFF.h

   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/MC/MCSection.h"
  18
  19 namespace llvm {
  20
  21 /// MCSectionCOFF - This represents a section on Windows
  22   class MCSectionCOFF : public MCSection {
  23     // The memory for this string is stored in the same MCContext as *this.
  24     StringRef SectionName;
  25
  26     /// Flags - This is the Characteristics field of a section, drawn
  27     /// from the enums below.
  28     unsigned Flags;
  29
  30   private:
  31     friend class MCContext;
  32     MCSectionCOFF(StringRef Section, unsigned flags, SectionKind K)
  33       : MCSection(K), SectionName(Section), Flags(flags) {
  34     }
  35     ~MCSectionCOFF();
  36
  37   public:
  38     /// ShouldOmitSectionDirective - Decides whether a '.section' directive
  39     /// should be printed before the section name
  40     bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
  41
  42     /// Valid section flags.
  43     enum {
  44       IMAGE_SCN_TYPE_NO_PAD                     = 0x00000008,
  45       IMAGE_SCN_CNT_CODE                        = 0x00000020,
  46       IMAGE_SCN_CNT_INITIALIZED_DATA            = 0x00000040,
  47       IMAGE_SCN_CNT_UNINITIALIZED_DATA          = 0x00000080,
  48       IMAGE_SCN_LNK_OTHER                       = 0x00000100,
  49       IMAGE_SCN_LNK_INFO                        = 0x00000200,
  50       IMAGE_SCN_LNK_REMOVE                      = 0x00000800,
  51       IMAGE_SCN_LNK_COMDAT                      = 0x00001000,
  52       IMAGE_SCN_MEM_FARDATA                     = 0x00008000,
  53       IMAGE_SCN_MEM_PURGEABLE                   = 0x00020000,
  54       IMAGE_SCN_MEM_16BIT                       = 0x00020000,
  55       IMAGE_SCN_MEM_LOCKED                      = 0x00040000,
  56       IMAGE_SCN_MEM_PRELOAD                     = 0x00080000,
  57       IMAGE_SCN_ALIGN_1BYTES                    = 0x00100000,
  58       IMAGE_SCN_ALIGN_2BYTES                    = 0x00200000,
  59       IMAGE_SCN_ALIGN_4BYTES                    = 0x00300000,
  60       IMAGE_SCN_ALIGN_8BYTES                    = 0x00400000,
  61       IMAGE_SCN_ALIGN_16BYTES                   = 0x00500000,
  62       IMAGE_SCN_ALIGN_32BYTES                   = 0x00600000,
  63       IMAGE_SCN_ALIGN_64BYTES                   = 0x00700000,
  64       IMAGE_SCN_LNK_NRELOC_OVFL                 = 0x01000000,
  65       IMAGE_SCN_MEM_DISCARDABLE                 = 0x02000000,
  66       IMAGE_SCN_MEM_NOT_CACHED                  = 0x04000000,
  67       IMAGE_SCN_MEM_NOT_PAGED                   = 0x08000000,
  68       IMAGE_SCN_MEM_SHARED                      = 0x10000000,
  69       IMAGE_SCN_MEM_EXECUTE                     = 0x20000000,
  70       IMAGE_SCN_MEM_READ                        = 0x40000000,
  71       IMAGE_SCN_MEM_WRITE                       = 0x80000000
  72     };
  73
  74     StringRef getSectionName() const { return SectionName; }
  75     unsigned getFlags() const { return Flags; }
  76
  77     virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
  78                                       raw_ostream &OS) const;
  79   };
  80
  81 } // end namespace llvm
  82
  83 #endif