#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.
- unsigned Characteristics;
+ /// 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
- int Selection;
+ mutable int Selection;
private:
friend class MCContext;
MCSectionCOFF(StringRef Section, unsigned Characteristics,
- int Selection, SectionKind K)
- : MCSection(SV_COFF, K), SectionName(Section),
- Characteristics(Characteristics), Selection (Selection) {
+ MCSymbol *COMDATSymbol, int Selection, SectionKind K,
+ MCSymbol *Begin)
+ : MCSection(SV_COFF, K, Begin), SectionName(Section),
+ Characteristics(Characteristics), COMDATSymbol(COMDATSymbol),
+ Selection(Selection) {
assert ((Characteristics & 0x00F00000) == 0 &&
"alignment must not be set upon section creation");
}
- ~MCSectionCOFF();
+ ~MCSectionCOFF() override;
public:
/// ShouldOmitSectionDirective - Decides whether a '.section' directive
/// should be printed before the section name
bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const;
- //FIXME: all COFF enumerations/flags should be standardized into one place...
- // Target/X86COFF.h doesn't seem right as COFF can be used for other targets,
- // MC/WinCOFF.h maybe right as it isn't target or entity specific, and it is
- // pretty low on the dependancy graph (is there any need to support non
- // windows COFF?)
- // here is good for section stuff, but others should go elsewhere
-
- /// Valid section flags.
- enum {
- IMAGE_SCN_TYPE_NO_PAD = 0x00000008,
- IMAGE_SCN_CNT_CODE = 0x00000020,
- IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040,
- IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080,
- IMAGE_SCN_LNK_OTHER = 0x00000100,
- IMAGE_SCN_LNK_INFO = 0x00000200,
- IMAGE_SCN_LNK_REMOVE = 0x00000800,
- IMAGE_SCN_LNK_COMDAT = 0x00001000,
- IMAGE_SCN_MEM_FARDATA = 0x00008000,
- IMAGE_SCN_MEM_PURGEABLE = 0x00020000,
- IMAGE_SCN_MEM_16BIT = 0x00020000,
- IMAGE_SCN_MEM_LOCKED = 0x00040000,
- IMAGE_SCN_MEM_PRELOAD = 0x00080000,
- /* these are handled elsewhere
- IMAGE_SCN_ALIGN_1BYTES = 0x00100000,
- IMAGE_SCN_ALIGN_2BYTES = 0x00200000,
- IMAGE_SCN_ALIGN_4BYTES = 0x00300000,
- IMAGE_SCN_ALIGN_8BYTES = 0x00400000,
- IMAGE_SCN_ALIGN_16BYTES = 0x00500000,
- IMAGE_SCN_ALIGN_32BYTES = 0x00600000,
- IMAGE_SCN_ALIGN_64BYTES = 0x00700000,
- */
- IMAGE_SCN_LNK_NRELOC_OVFL = 0x01000000,
- IMAGE_SCN_MEM_DISCARDABLE = 0x02000000,
- IMAGE_SCN_MEM_NOT_CACHED = 0x04000000,
- IMAGE_SCN_MEM_NOT_PAGED = 0x08000000,
- IMAGE_SCN_MEM_SHARED = 0x10000000,
- IMAGE_SCN_MEM_EXECUTE = 0x20000000,
- IMAGE_SCN_MEM_READ = 0x40000000,
- IMAGE_SCN_MEM_WRITE = 0x80000000
- };
-
- enum {
- IMAGE_COMDAT_SELECT_NODUPLICATES = 1,
- IMAGE_COMDAT_SELECT_ANY,
- IMAGE_COMDAT_SELECT_SAME_SIZE,
- IMAGE_COMDAT_SELECT_EXACT_MATCH,
- IMAGE_COMDAT_SELECT_ASSOCIATIVE,
- IMAGE_COMDAT_SELECT_LARGEST
- };
-
StringRef getSectionName() const { return SectionName; }
unsigned getCharacteristics() const { return Characteristics; }
- int getSelection () const { return Selection; }
-
- virtual void PrintSwitchToSection(const MCAsmInfo &MAI,
- raw_ostream &OS) const;
+ 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;
}
- static bool classof(const MCSectionCOFF *) { return true; }
};
} // end namespace llvm