#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/StringTableBuilder.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
-class MCSectionData;
class MachObjectWriter;
class MCMachObjectTargetWriter {
const unsigned Is64Bit : 1;
const uint32_t CPUType;
const uint32_t CPUSubtype;
- // FIXME: Remove this, we should just always use it once we no longer care
- // about Darwin 'as' compatibility.
- const unsigned UseAggressiveSymbolFolding : 1;
unsigned LocalDifference_RIT;
protected:
MCMachObjectTargetWriter(bool Is64Bit_, uint32_t CPUType_,
- uint32_t CPUSubtype_,
- bool UseAggressiveSymbolFolding_ = false);
+ uint32_t CPUSubtype_);
void setLocalDifferenceRelocationType(unsigned Type) {
LocalDifference_RIT = Type;
public:
virtual ~MCMachObjectTargetWriter();
- /// @name Lifetime Management
+ /// \name Lifetime Management
/// @{
- virtual void reset() {};
+ virtual void reset() {}
/// @}
- /// @name Accessors
+ /// \name Accessors
/// @{
bool is64Bit() const { return Is64Bit; }
- bool useAggressiveSymbolFolding() const { return UseAggressiveSymbolFolding; }
uint32_t getCPUType() const { return CPUType; }
uint32_t getCPUSubtype() const { return CPUSubtype; }
unsigned getLocalDifferenceRelocationType() const {
/// @}
- /// @name API
+ /// \name API
/// @{
- virtual void RecordRelocation(MachObjectWriter *Writer,
- const MCAssembler &Asm,
+ virtual void recordRelocation(MachObjectWriter *Writer, MCAssembler &Asm,
const MCAsmLayout &Layout,
const MCFragment *Fragment,
- const MCFixup &Fixup,
- MCValue Target,
+ const MCFixup &Fixup, MCValue Target,
uint64_t &FixedValue) = 0;
/// @}
};
class MachObjectWriter : public MCObjectWriter {
- /// MachSymbolData - Helper struct for containing some precomputed information
- /// on symbols.
+ /// Helper struct for containing some precomputed information on symbols.
struct MachSymbolData {
- MCSymbolData *SymbolData;
+ const MCSymbol *Symbol;
uint64_t StringIndex;
uint8_t SectionIndex;
/// The target specific Mach-O writer instance.
std::unique_ptr<MCMachObjectTargetWriter> TargetObjectWriter;
- /// @name Relocation Data
+ /// \name Relocation Data
/// @{
- llvm::DenseMap<const MCSectionData*,
- std::vector<MachO::any_relocation_info> > Relocations;
- llvm::DenseMap<const MCSectionData*, unsigned> IndirectSymBase;
+ struct RelAndSymbol {
+ const MCSymbol *Sym;
+ MachO::any_relocation_info MRE;
+ RelAndSymbol(const MCSymbol *Sym, const MachO::any_relocation_info &MRE)
+ : Sym(Sym), MRE(MRE) {}
+ };
+
+ llvm::DenseMap<const MCSection *, std::vector<RelAndSymbol>> Relocations;
+ llvm::DenseMap<const MCSection *, unsigned> IndirectSymBase;
+
+ SectionAddrMap SectionAddress;
/// @}
- /// @name Symbol Table Data
+ /// \name Symbol Table Data
/// @{
- StringTableBuilder StringTable;
+ StringTableBuilder StringTable{StringTableBuilder::MachO};
std::vector<MachSymbolData> LocalSymbolData;
std::vector<MachSymbolData> ExternalSymbolData;
std::vector<MachSymbolData> UndefinedSymbolData;
MachSymbolData *findSymbolData(const MCSymbol &Sym);
public:
- MachObjectWriter(MCMachObjectTargetWriter *MOTW, raw_ostream &_OS,
- bool _IsLittleEndian)
- : MCObjectWriter(_OS, _IsLittleEndian), TargetObjectWriter(MOTW) {
- }
+ MachObjectWriter(MCMachObjectTargetWriter *MOTW, raw_pwrite_stream &OS,
+ bool IsLittleEndian)
+ : MCObjectWriter(OS, IsLittleEndian), TargetObjectWriter(MOTW) {}
+
+ const MCSymbol &findAliasedSymbol(const MCSymbol &Sym) const;
- /// @name Lifetime management Methods
+ /// \name Lifetime management Methods
/// @{
void reset() override;
/// @}
- /// @name Utility Methods
+ /// \name Utility Methods
/// @{
bool isFixupKindPCRel(const MCAssembler &Asm, unsigned Kind);
- SectionAddrMap SectionAddress;
-
SectionAddrMap &getSectionAddressMap() { return SectionAddress; }
- uint64_t getSectionAddress(const MCSectionData* SD) const {
- return SectionAddress.lookup(SD);
+ uint64_t getSectionAddress(const MCSection *Sec) const {
+ return SectionAddress.lookup(Sec);
}
- uint64_t getSymbolAddress(const MCSymbolData* SD,
- const MCAsmLayout &Layout) const;
+ uint64_t getSymbolAddress(const MCSymbol &S, const MCAsmLayout &Layout) const;
uint64_t getFragmentAddress(const MCFragment *Fragment,
const MCAsmLayout &Layout) const;
- uint64_t getPaddingSize(const MCSectionData *SD,
- const MCAsmLayout &Layout) const;
+ uint64_t getPaddingSize(const MCSection *SD, const MCAsmLayout &Layout) const;
- bool doesSymbolRequireExternRelocation(const MCSymbolData *SD);
+ bool doesSymbolRequireExternRelocation(const MCSymbol &S);
/// @}
- /// @name Target Writer Proxy Accessors
+ /// \name Target Writer Proxy Accessors
/// @{
bool is64Bit() const { return TargetObjectWriter->is64Bit(); }
/// @}
- void WriteHeader(unsigned NumLoadCommands, unsigned LoadCommandsSize,
- bool SubsectionsViaSymbols);
+ void writeHeader(MachO::HeaderFileType Type, unsigned NumLoadCommands,
+ unsigned LoadCommandsSize, bool SubsectionsViaSymbols);
- /// WriteSegmentLoadCommand - Write a segment load command.
+ /// Write a segment load command.
///
/// \param NumSections The number of sections in this segment.
/// \param SectionDataSize The total size of the sections.
- void WriteSegmentLoadCommand(unsigned NumSections,
- uint64_t VMSize,
+ void writeSegmentLoadCommand(StringRef Name, unsigned NumSections,
+ uint64_t VMAddr, uint64_t VMSize,
uint64_t SectionDataStartOffset,
- uint64_t SectionDataSize);
+ uint64_t SectionDataSize, uint32_t MaxProt,
+ uint32_t InitProt);
- void WriteSection(const MCAssembler &Asm, const MCAsmLayout &Layout,
- const MCSectionData &SD, uint64_t FileOffset,
+ void writeSection(const MCAsmLayout &Layout, const MCSection &Sec,
+ uint64_t VMAddr, uint64_t FileOffset, unsigned Flags,
uint64_t RelocationsStart, unsigned NumRelocations);
- void WriteSymtabLoadCommand(uint32_t SymbolOffset, uint32_t NumSymbols,
+ void writeSymtabLoadCommand(uint32_t SymbolOffset, uint32_t NumSymbols,
uint32_t StringTableOffset,
uint32_t StringTableSize);
- void WriteDysymtabLoadCommand(uint32_t FirstLocalSymbol,
- uint32_t NumLocalSymbols,
- uint32_t FirstExternalSymbol,
- uint32_t NumExternalSymbols,
- uint32_t FirstUndefinedSymbol,
- uint32_t NumUndefinedSymbols,
- uint32_t IndirectSymbolOffset,
- uint32_t NumIndirectSymbols);
+ void writeDysymtabLoadCommand(
+ uint32_t FirstLocalSymbol, uint32_t NumLocalSymbols,
+ uint32_t FirstExternalSymbol, uint32_t NumExternalSymbols,
+ uint32_t FirstUndefinedSymbol, uint32_t NumUndefinedSymbols,
+ uint32_t IndirectSymbolOffset, uint32_t NumIndirectSymbols);
- void WriteNlist(MachSymbolData &MSD, const MCAsmLayout &Layout);
+ void writeNlist(MachSymbolData &MSD, const MCAsmLayout &Layout);
- void WriteLinkeditLoadCommand(uint32_t Type, uint32_t DataOffset,
+ void writeLinkeditLoadCommand(uint32_t Type, uint32_t DataOffset,
uint32_t DataSize);
- void WriteLinkerOptionsLoadCommand(const std::vector<std::string> &Options);
+ void writeLinkerOptionsLoadCommand(const std::vector<std::string> &Options);
// FIXME: We really need to improve the relocation validation. Basically, we
// want to implement a separate computation which evaluates the relocation
// - Input errors, where something cannot be correctly encoded. 'as' allows
// these through in many cases.
- void addRelocation(const MCSectionData *SD,
+ // Add a relocation to be output in the object file. At the time this is
+ // called, the symbol indexes are not know, so if the relocation refers
+ // to a symbol it should be passed as \p RelSymbol so that it can be updated
+ // afterwards. If the relocation doesn't refer to a symbol, nullptr should be
+ // used.
+ void addRelocation(const MCSymbol *RelSymbol, const MCSection *Sec,
MachO::any_relocation_info &MRE) {
- Relocations[SD].push_back(MRE);
+ RelAndSymbol P(RelSymbol, MRE);
+ Relocations[Sec].push_back(P);
}
- void RecordScatteredRelocation(const MCAssembler &Asm,
+ void recordScatteredRelocation(const MCAssembler &Asm,
const MCAsmLayout &Layout,
const MCFragment *Fragment,
const MCFixup &Fixup, MCValue Target,
- unsigned Log2Size,
- uint64_t &FixedValue);
+ unsigned Log2Size, uint64_t &FixedValue);
- void RecordTLVPRelocation(const MCAssembler &Asm,
- const MCAsmLayout &Layout,
- const MCFragment *Fragment,
- const MCFixup &Fixup, MCValue Target,
- uint64_t &FixedValue);
+ void recordTLVPRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
+ const MCFragment *Fragment, const MCFixup &Fixup,
+ MCValue Target, uint64_t &FixedValue);
- void RecordRelocation(const MCAssembler &Asm, const MCAsmLayout &Layout,
+ void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFragment *Fragment, const MCFixup &Fixup,
MCValue Target, bool &IsPCRel,
uint64_t &FixedValue) override;
- void BindIndirectSymbols(MCAssembler &Asm);
+ void bindIndirectSymbols(MCAssembler &Asm);
- /// ComputeSymbolTable - Compute the symbol table data
- ///
- void ComputeSymbolTable(MCAssembler &Asm,
+ /// Compute the symbol table data.
+ void computeSymbolTable(MCAssembler &Asm,
std::vector<MachSymbolData> &LocalSymbolData,
std::vector<MachSymbolData> &ExternalSymbolData,
std::vector<MachSymbolData> &UndefinedSymbolData);
void computeSectionAddresses(const MCAssembler &Asm,
const MCAsmLayout &Layout);
- void markAbsoluteVariableSymbols(MCAssembler &Asm,
- const MCAsmLayout &Layout);
- void ExecutePostLayoutBinding(MCAssembler &Asm,
+ void executePostLayoutBinding(MCAssembler &Asm,
const MCAsmLayout &Layout) override;
- bool IsSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
- const MCSymbolData &DataA,
- const MCFragment &FB,
- bool InSet,
+ bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
+ const MCSymbol &A,
+ const MCSymbol &B,
+ bool InSet) const override;
+
+ bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
+ const MCSymbol &SymA,
+ const MCFragment &FB, bool InSet,
bool IsPCRel) const override;
- void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout) override;
+ void writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override;
};
-
-/// \brief Construct a new Mach-O writer instance.
+/// Construct a new Mach-O writer instance.
///
/// This routine takes ownership of the target writer subclass.
///
/// \param OS - The stream to write to.
/// \returns The constructed object writer.
MCObjectWriter *createMachObjectWriter(MCMachObjectTargetWriter *MOTW,
- raw_ostream &OS, bool IsLittleEndian);
+ raw_pwrite_stream &OS,
+ bool IsLittleEndian);
} // End llvm namespace
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