#ifndef LLVM_MC_MCSECTIONELF_H
#define LLVM_MC_MCSECTIONELF_H
-#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCSymbolELF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/raw_ostream.h"
class MCSymbol;
-/// MCSectionELF - This represents a section on linux, lots of unix variants
-/// and some bare metal systems.
-class MCSectionELF : public MCSection {
- /// SectionName - This is the name of the section. The referenced memory is
- /// owned by TargetLoweringObjectFileELF's ELFUniqueMap.
+/// This represents a section on linux, lots of unix variants and some bare
+/// metal systems.
+class MCSectionELF final : public MCSection {
+ /// This is the name of the section. The referenced memory is owned by
+ /// TargetLoweringObjectFileELF's ELFUniqueMap.
StringRef SectionName;
- /// Type - This is the sh_type field of a section, drawn from the enums below.
+ /// This is the sh_type field of a section, drawn from the enums below.
unsigned Type;
- /// Flags - This is the sh_flags field of a section, drawn from the enums.
- /// below.
+ /// This is the sh_flags field of a section, drawn from the enums below.
unsigned Flags;
- /// EntrySize - The size of each entry in this section. This size only
- /// makes sense for sections that contain fixed-sized entries. If a
- /// section does not contain fixed-sized entries 'EntrySize' will be 0.
+ unsigned UniqueID;
+
+ /// The size of each entry in this section. This size only makes sense for
+ /// sections that contain fixed-sized entries. If a section does not contain
+ /// fixed-sized entries 'EntrySize' will be 0.
unsigned EntrySize;
- const MCSymbol *Group;
+ const MCSymbolELF *Group;
+
+ /// Depending on the type of the section this is sh_link or sh_info.
+ const MCSectionELF *Associated;
private:
friend class MCContext;
- MCSectionELF(StringRef Section, unsigned type, unsigned flags,
- SectionKind K, unsigned entrySize, const MCSymbol *group)
- : MCSection(SV_ELF, K), SectionName(Section), Type(type), Flags(flags),
- EntrySize(entrySize), Group(group) {}
- ~MCSectionELF();
+ MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K,
+ unsigned entrySize, const MCSymbolELF *group, unsigned UniqueID,
+ MCSymbol *Begin, const MCSectionELF *Associated)
+ : MCSection(SV_ELF, K, Begin), SectionName(Section), Type(type),
+ Flags(flags), UniqueID(UniqueID), EntrySize(entrySize), Group(group),
+ Associated(Associated) {
+ if (Group)
+ Group->setIsSignature();
+ }
void setSectionName(StringRef Name) { SectionName = Name; }
+
public:
+ ~MCSectionELF();
- /// ShouldOmitSectionDirective - Decides whether a '.section' directive
- /// should be printed before the section name
+ /// 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 {
- if (Group)
- return (SectionName.str() + '_' + Group->getName() + "_begin").str();
- return SectionName.str() + "_begin";
- }
- std::string getLabelEndName() const override {
- if (Group)
- return (SectionName.str() + '_' + Group->getName() + "_end").str();
- return SectionName.str() + "_end";
- }
unsigned getType() const { return Type; }
unsigned getFlags() const { return Flags; }
unsigned getEntrySize() const { return EntrySize; }
- const MCSymbol *getGroup() const { return Group; }
+ const MCSymbolELF *getGroup() const { return Group; }
void PrintSwitchToSection(const MCAsmInfo &MAI, raw_ostream &OS,
const MCExpr *Subsection) const override;
bool UseCodeAlign() const override;
bool isVirtualSection() const override;
- /// isBaseAddressKnownZero - We know that non-allocatable sections (like
- /// debug info) have a base of zero.
- bool isBaseAddressKnownZero() const override {
- return (getFlags() & ELF::SHF_ALLOC) == 0;
- }
+ bool isUnique() const { return UniqueID != ~0U; }
+ unsigned getUniqueID() const { return UniqueID; }
+
+ const MCSectionELF *getAssociatedSection() const { return Associated; }
static bool classof(const MCSection *S) {
return S->getVariant() == SV_ELF;
}
-
- // Return the entry size for sections with fixed-width data.
- static unsigned DetermineEntrySize(SectionKind Kind);
-
};
} // end namespace llvm