#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/iterator.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCFragment.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCLinkerOptimizationHint.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
namespace llvm {
class raw_ostream;
class MCAsmLayout;
class MCAssembler;
class MCContext;
class MCCodeEmitter;
class MCExpr;
class MCFragment;
class MCObjectWriter;
class MCSection;
class MCSubtargetInfo;
class MCValue;
class MCAsmBackend;
struct IndirectSymbolData {
MCSymbol *Symbol;
MCSection *Section;
};
struct DataRegionData {
enum KindTy { Data = 1, JumpTable8, JumpTable16, JumpTable32 } Kind;
MCSymbol *Start;
MCSymbol *End;
};
class MCAssembler {
friend class MCAsmLayout;
public:
typedef std::vector<MCSection *> SectionListType;
typedef std::vector<const MCSymbol *> SymbolDataListType;
typedef pointee_iterator<SectionListType::const_iterator> const_iterator;
typedef pointee_iterator<SectionListType::iterator> iterator;
typedef pointee_iterator<SymbolDataListType::const_iterator>
const_symbol_iterator;
typedef pointee_iterator<SymbolDataListType::iterator> symbol_iterator;
typedef iterator_range<symbol_iterator> symbol_range;
typedef iterator_range<const_symbol_iterator> const_symbol_range;
typedef std::vector<IndirectSymbolData>::const_iterator
const_indirect_symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
typedef std::vector<DataRegionData>::const_iterator
const_data_region_iterator;
typedef std::vector<DataRegionData>::iterator data_region_iterator;
typedef struct {
MCVersionMinType Kind;
unsigned Major;
unsigned Minor;
unsigned Update;
} VersionMinInfoType;
private:
MCAssembler(const MCAssembler &) = delete;
void operator=(const MCAssembler &) = delete;
MCContext &Context;
MCAsmBackend &Backend;
MCCodeEmitter &Emitter;
MCObjectWriter &Writer;
SectionListType Sections;
SymbolDataListType Symbols;
std::vector<IndirectSymbolData> IndirectSymbols;
std::vector<DataRegionData> DataRegions;
std::vector<std::vector<std::string>> LinkerOptions;
std::vector<std::string> FileNames;
MCDwarfLineTableParams LTParams;
mutable SmallPtrSet<const MCSymbol *, 32> ThumbFuncs;
unsigned BundleAlignSize;
unsigned RelaxAll : 1;
unsigned SubsectionsViaSymbols : 1;
unsigned IncrementalLinkerCompatible : 1;
unsigned ELFHeaderEFlags;
MCLOHContainer LOHContainer;
VersionMinInfoType VersionMinInfo;
private:
bool evaluateFixup(const MCAsmLayout &Layout, const MCFixup &Fixup,
const MCFragment *DF, MCValue &Target,
uint64_t &Value) const;
bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const;
bool fragmentNeedsRelaxation(const MCRelaxableFragment *IF,
const MCAsmLayout &Layout) const;
bool layoutOnce(MCAsmLayout &Layout);
bool layoutSectionOnce(MCAsmLayout &Layout, MCSection &Sec);
bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
bool relaxDwarfCallFrameFragment(MCAsmLayout &Layout,
MCDwarfCallFrameFragment &DF);
void finishLayout(MCAsmLayout &Layout);
std::pair<uint64_t, bool> handleFixup(const MCAsmLayout &Layout,
MCFragment &F, const MCFixup &Fixup);
public:
uint64_t computeFragmentSize(const MCAsmLayout &Layout,
const MCFragment &F) const;
const MCSymbol *getAtom(const MCSymbol &S) const;
bool isSymbolLinkerVisible(const MCSymbol &SD) const;
void writeSectionData(const MCSection *Section,
const MCAsmLayout &Layout) const;
bool isThumbFunc(const MCSymbol *Func) const;
void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }
unsigned getELFHeaderEFlags() const { return ELFHeaderEFlags; }
void setELFHeaderEFlags(unsigned Flags) { ELFHeaderEFlags = Flags; }
const VersionMinInfoType &getVersionMinInfo() const { return VersionMinInfo; }
void setVersionMinInfo(MCVersionMinType Kind, unsigned Major, unsigned Minor,
unsigned Update) {
VersionMinInfo.Kind = Kind;
VersionMinInfo.Major = Major;
VersionMinInfo.Minor = Minor;
VersionMinInfo.Update = Update;
}
public:
MCAssembler(MCContext &Context_, MCAsmBackend &Backend_,
MCCodeEmitter &Emitter_, MCObjectWriter &Writer_);
~MCAssembler();
void reset();
MCContext &getContext() const { return Context; }
MCAsmBackend &getBackend() const { return Backend; }
MCCodeEmitter &getEmitter() const { return Emitter; }
MCObjectWriter &getWriter() const { return Writer; }
MCDwarfLineTableParams getDWARFLinetableParams() const { return LTParams; }
void setDWARFLinetableParams(MCDwarfLineTableParams P) { LTParams = P; }
void Finish();
void layout(MCAsmLayout &Layout);
bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
bool isIncrementalLinkerCompatible() const {
return IncrementalLinkerCompatible;
}
void setIncrementalLinkerCompatible(bool Value) {
IncrementalLinkerCompatible = Value;
}
bool getRelaxAll() const { return RelaxAll; }
void setRelaxAll(bool Value) { RelaxAll = Value; }
bool isBundlingEnabled() const { return BundleAlignSize != 0; }
unsigned getBundleAlignSize() const { return BundleAlignSize; }
void setBundleAlignSize(unsigned Size) {
assert((Size == 0 || !(Size & (Size - 1))) &&
"Expect a power-of-two bundle align size");
BundleAlignSize = Size;
}
iterator begin() { return Sections.begin(); }
const_iterator begin() const { return Sections.begin(); }
iterator end() { return Sections.end(); }
const_iterator end() const { return Sections.end(); }
size_t size() const { return Sections.size(); }
symbol_iterator symbol_begin() { return Symbols.begin(); }
const_symbol_iterator symbol_begin() const { return Symbols.begin(); }
symbol_iterator symbol_end() { return Symbols.end(); }
const_symbol_iterator symbol_end() const { return Symbols.end(); }
symbol_range symbols() { return make_range(symbol_begin(), symbol_end()); }
const_symbol_range symbols() const {
return make_range(symbol_begin(), symbol_end());
}
size_t symbol_size() const { return Symbols.size(); }
std::vector<IndirectSymbolData> &getIndirectSymbols() {
return IndirectSymbols;
}
indirect_symbol_iterator indirect_symbol_begin() {
return IndirectSymbols.begin();
}
const_indirect_symbol_iterator indirect_symbol_begin() const {
return IndirectSymbols.begin();
}
indirect_symbol_iterator indirect_symbol_end() {
return IndirectSymbols.end();
}
const_indirect_symbol_iterator indirect_symbol_end() const {
return IndirectSymbols.end();
}
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
std::vector<std::vector<std::string>> &getLinkerOptions() {
return LinkerOptions;
}
std::vector<DataRegionData> &getDataRegions() { return DataRegions; }
data_region_iterator data_region_begin() { return DataRegions.begin(); }
const_data_region_iterator data_region_begin() const {
return DataRegions.begin();
}
data_region_iterator data_region_end() { return DataRegions.end(); }
const_data_region_iterator data_region_end() const {
return DataRegions.end();
}
size_t data_region_size() const { return DataRegions.size(); }
MCLOHContainer &getLOHContainer() { return LOHContainer; }
const MCLOHContainer &getLOHContainer() const {
return const_cast<MCAssembler *>(this)->getLOHContainer();
}
bool registerSection(MCSection &Section);
void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr);
ArrayRef<std::string> getFileNames() { return FileNames; }
void addFileName(StringRef FileName) {
if (std::find(FileNames.begin(), FileNames.end(), FileName) ==
FileNames.end())
FileNames.push_back(FileName);
}
void writeFragmentPadding(const MCFragment &F, uint64_t FSize,
MCObjectWriter *OW) const;
void dump();
};
uint64_t computeBundlePadding(const MCAssembler &Assembler, const MCFragment *F,
uint64_t FOffset, uint64_t FSize);
}
#endif