mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
7259f14839
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207593 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
//===- MCSectionELF.h - ELF 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 MCSectionELF class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCSECTIONELF_H
|
|
#define LLVM_MC_MCSECTIONELF_H
|
|
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/MC/MCSection.h"
|
|
#include "llvm/MC/MCSymbol.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ELF.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
namespace llvm {
|
|
|
|
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.
|
|
StringRef SectionName;
|
|
|
|
/// Type - 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.
|
|
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 EntrySize;
|
|
|
|
const MCSymbol *Group;
|
|
|
|
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();
|
|
|
|
void setSectionName(StringRef Name) { SectionName = Name; }
|
|
|
|
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; }
|
|
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; }
|
|
|
|
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;
|
|
}
|
|
|
|
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
|
|
|
|
#endif
|