| //===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file describes common object file formats. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCOBJECTFILEINFO_H |
| #define LLVM_MC_MCOBJECTFILEINFO_H |
| |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/Support/CodeGen.h" |
| |
| namespace llvm { |
| class MCContext; |
| class MCSection; |
| class StringRef; |
| |
| class MCObjectFileInfo { |
| protected: |
| /// CommDirectiveSupportsAlignment - True if .comm supports alignment. This |
| /// is a hack for as long as we support 10.4 Tiger, whose assembler doesn't |
| /// support alignment on comm. |
| bool CommDirectiveSupportsAlignment; |
| |
| /// SupportsWeakEmptyEHFrame - True if target object file supports a |
| /// weak_definition of constant 0 for an omitted EH frame. |
| bool SupportsWeakOmittedEHFrame; |
| |
| /// SupportsCompactUnwindWithoutEHFrame - True if the target object file |
| /// supports emitting a compact unwind section without an associated EH frame |
| /// section. |
| bool SupportsCompactUnwindWithoutEHFrame; |
| |
| /// PersonalityEncoding, LSDAEncoding, TTypeEncoding - Some encoding values |
| /// for EH. |
| unsigned PersonalityEncoding; |
| unsigned LSDAEncoding; |
| unsigned FDECFIEncoding; |
| unsigned TTypeEncoding; |
| |
| /// Section flags for eh_frame |
| unsigned EHSectionType; |
| unsigned EHSectionFlags; |
| |
| /// CompactUnwindDwarfEHFrameOnly - Compact unwind encoding indicating that we |
| /// should emit only an EH frame. |
| unsigned CompactUnwindDwarfEHFrameOnly; |
| |
| /// TextSection - Section directive for standard text. |
| /// |
| const MCSection *TextSection; |
| |
| /// DataSection - Section directive for standard data. |
| /// |
| const MCSection *DataSection; |
| |
| /// BSSSection - Section that is default initialized to zero. |
| const MCSection *BSSSection; |
| |
| /// ReadOnlySection - Section that is readonly and can contain arbitrary |
| /// initialized data. Targets are not required to have a readonly section. |
| /// If they don't, various bits of code will fall back to using the data |
| /// section for constants. |
| const MCSection *ReadOnlySection; |
| |
| /// StaticCtorSection - This section contains the static constructor pointer |
| /// list. |
| const MCSection *StaticCtorSection; |
| |
| /// StaticDtorSection - This section contains the static destructor pointer |
| /// list. |
| const MCSection *StaticDtorSection; |
| |
| /// LSDASection - If exception handling is supported by the target, this is |
| /// the section the Language Specific Data Area information is emitted to. |
| const MCSection *LSDASection; |
| |
| /// CompactUnwindSection - If exception handling is supported by the target |
| /// and the target can support a compact representation of the CIE and FDE, |
| /// this is the section to emit them into. |
| const MCSection *CompactUnwindSection; |
| |
| // Dwarf sections for debug info. If a target supports debug info, these must |
| // be set. |
| const MCSection *DwarfAbbrevSection; |
| const MCSection *DwarfInfoSection; |
| const MCSection *DwarfLineSection; |
| const MCSection *DwarfFrameSection; |
| const MCSection *DwarfPubTypesSection; |
| const MCSection *DwarfDebugInlineSection; |
| const MCSection *DwarfStrSection; |
| const MCSection *DwarfLocSection; |
| const MCSection *DwarfARangesSection; |
| const MCSection *DwarfRangesSection; |
| const MCSection *DwarfMacroInfoSection; |
| // The pubnames section is no longer generated by default. The generation |
| // can be enabled by a compiler flag. |
| const MCSection *DwarfPubNamesSection; |
| |
| // DWARF5 Experimental Debug Info Sections |
| /// DwarfAccelNamesSection, DwarfAccelObjCSection, |
| /// DwarfAccelNamespaceSection, DwarfAccelTypesSection - |
| /// If we use the DWARF accelerated hash tables then we want to emit these |
| /// sections. |
| const MCSection *DwarfAccelNamesSection; |
| const MCSection *DwarfAccelObjCSection; |
| const MCSection *DwarfAccelNamespaceSection; |
| const MCSection *DwarfAccelTypesSection; |
| |
| /// These are used for the Fission separate debug information files. |
| const MCSection *DwarfInfoDWOSection; |
| const MCSection *DwarfTypesDWOSection; |
| const MCSection *DwarfAbbrevDWOSection; |
| const MCSection *DwarfStrDWOSection; |
| const MCSection *DwarfLineDWOSection; |
| const MCSection *DwarfLocDWOSection; |
| const MCSection *DwarfStrOffDWOSection; |
| const MCSection *DwarfAddrSection; |
| |
| /// Sections for newer gnu pubnames and pubtypes. |
| const MCSection *DwarfGnuPubNamesSection; |
| const MCSection *DwarfGnuPubTypesSection; |
| |
| const MCSection *COFFDebugSymbolsSection; |
| |
| // Extra TLS Variable Data section. If the target needs to put additional |
| // information for a TLS variable, it'll go here. |
| const MCSection *TLSExtraDataSection; |
| |
| /// TLSDataSection - Section directive for Thread Local data. |
| /// ELF, MachO and COFF. |
| const MCSection *TLSDataSection; // Defaults to ".tdata". |
| |
| /// TLSBSSSection - Section directive for Thread Local uninitialized data. |
| /// Null if this target doesn't support a BSS section. |
| /// ELF and MachO only. |
| const MCSection *TLSBSSSection; // Defaults to ".tbss". |
| |
| /// StackMap section. |
| const MCSection *StackMapSection; |
| |
| /// EHFrameSection - EH frame section. It is initialized on demand so it |
| /// can be overwritten (with uniquing). |
| const MCSection *EHFrameSection; |
| |
| /// ELF specific sections. |
| /// |
| const MCSection *DataRelSection; |
| const MCSection *DataRelLocalSection; |
| const MCSection *DataRelROSection; |
| const MCSection *DataRelROLocalSection; |
| const MCSection *MergeableConst4Section; |
| const MCSection *MergeableConst8Section; |
| const MCSection *MergeableConst16Section; |
| |
| /// MachO specific sections. |
| /// |
| |
| /// TLSTLVSection - Section for thread local structure information. |
| /// Contains the source code name of the variable, visibility and a pointer |
| /// to the initial value (.tdata or .tbss). |
| const MCSection *TLSTLVSection; // Defaults to ".tlv". |
| |
| /// TLSThreadInitSection - Section for thread local data initialization |
| /// functions. |
| const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func". |
| |
| const MCSection *CStringSection; |
| const MCSection *UStringSection; |
| const MCSection *TextCoalSection; |
| const MCSection *ConstTextCoalSection; |
| const MCSection *ConstDataSection; |
| const MCSection *DataCoalSection; |
| const MCSection *DataCommonSection; |
| const MCSection *DataBSSSection; |
| const MCSection *FourByteConstantSection; |
| const MCSection *EightByteConstantSection; |
| const MCSection *SixteenByteConstantSection; |
| const MCSection *LazySymbolPointerSection; |
| const MCSection *NonLazySymbolPointerSection; |
| |
| /// COFF specific sections. |
| /// |
| const MCSection *DrectveSection; |
| const MCSection *PDataSection; |
| const MCSection *XDataSection; |
| |
| public: |
| void InitMCObjectFileInfo(StringRef TT, Reloc::Model RM, CodeModel::Model CM, |
| MCContext &ctx); |
| |
| bool getSupportsWeakOmittedEHFrame() const { |
| return SupportsWeakOmittedEHFrame; |
| } |
| bool getSupportsCompactUnwindWithoutEHFrame() const { |
| return SupportsCompactUnwindWithoutEHFrame; |
| } |
| bool getCommDirectiveSupportsAlignment() const { |
| return CommDirectiveSupportsAlignment; |
| } |
| |
| unsigned getPersonalityEncoding() const { return PersonalityEncoding; } |
| unsigned getLSDAEncoding() const { return LSDAEncoding; } |
| unsigned getFDEEncoding() const { return FDECFIEncoding; } |
| unsigned getTTypeEncoding() const { return TTypeEncoding; } |
| |
| unsigned getCompactUnwindDwarfEHFrameOnly() const { |
| return CompactUnwindDwarfEHFrameOnly; |
| } |
| |
| const MCSection *getTextSection() const { return TextSection; } |
| const MCSection *getDataSection() const { return DataSection; } |
| const MCSection *getBSSSection() const { return BSSSection; } |
| const MCSection *getLSDASection() const { return LSDASection; } |
| const MCSection *getCompactUnwindSection() const{ |
| return CompactUnwindSection; |
| } |
| const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; } |
| const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; } |
| const MCSection *getDwarfLineSection() const { return DwarfLineSection; } |
| const MCSection *getDwarfFrameSection() const { return DwarfFrameSection; } |
| const MCSection *getDwarfPubNamesSection() const{return DwarfPubNamesSection;} |
| const MCSection *getDwarfPubTypesSection() const{return DwarfPubTypesSection;} |
| const MCSection *getDwarfGnuPubNamesSection() const { |
| return DwarfGnuPubNamesSection; |
| } |
| const MCSection *getDwarfGnuPubTypesSection() const { |
| return DwarfGnuPubTypesSection; |
| } |
| const MCSection *getDwarfDebugInlineSection() const { |
| return DwarfDebugInlineSection; |
| } |
| const MCSection *getDwarfStrSection() const { return DwarfStrSection; } |
| const MCSection *getDwarfLocSection() const { return DwarfLocSection; } |
| const MCSection *getDwarfARangesSection() const { return DwarfARangesSection;} |
| const MCSection *getDwarfRangesSection() const { return DwarfRangesSection; } |
| const MCSection *getDwarfMacroInfoSection() const { |
| return DwarfMacroInfoSection; |
| } |
| |
| // DWARF5 Experimental Debug Info Sections |
| const MCSection *getDwarfAccelNamesSection() const { |
| return DwarfAccelNamesSection; |
| } |
| const MCSection *getDwarfAccelObjCSection() const { |
| return DwarfAccelObjCSection; |
| } |
| const MCSection *getDwarfAccelNamespaceSection() const { |
| return DwarfAccelNamespaceSection; |
| } |
| const MCSection *getDwarfAccelTypesSection() const { |
| return DwarfAccelTypesSection; |
| } |
| const MCSection *getDwarfInfoDWOSection() const { |
| return DwarfInfoDWOSection; |
| } |
| const MCSection *getDwarfTypesSection(uint64_t Hash) const; |
| const MCSection *getDwarfTypesDWOSection() const { |
| return DwarfTypesDWOSection; |
| } |
| const MCSection *getDwarfAbbrevDWOSection() const { |
| return DwarfAbbrevDWOSection; |
| } |
| const MCSection *getDwarfStrDWOSection() const { |
| return DwarfStrDWOSection; |
| } |
| const MCSection *getDwarfLineDWOSection() const { |
| return DwarfLineDWOSection; |
| } |
| const MCSection *getDwarfLocDWOSection() const { |
| return DwarfLocDWOSection; |
| } |
| const MCSection *getDwarfStrOffDWOSection() const { |
| return DwarfStrOffDWOSection; |
| } |
| const MCSection *getDwarfAddrSection() const { |
| return DwarfAddrSection; |
| } |
| |
| const MCSection *getCOFFDebugSymbolsSection() const { |
| return COFFDebugSymbolsSection; |
| } |
| |
| const MCSection *getTLSExtraDataSection() const { |
| return TLSExtraDataSection; |
| } |
| const MCSection *getTLSDataSection() const { return TLSDataSection; } |
| const MCSection *getTLSBSSSection() const { return TLSBSSSection; } |
| |
| const MCSection *getStackMapSection() const { return StackMapSection; } |
| |
| /// ELF specific sections. |
| /// |
| const MCSection *getDataRelSection() const { return DataRelSection; } |
| const MCSection *getDataRelLocalSection() const { |
| return DataRelLocalSection; |
| } |
| const MCSection *getDataRelROSection() const { return DataRelROSection; } |
| const MCSection *getDataRelROLocalSection() const { |
| return DataRelROLocalSection; |
| } |
| const MCSection *getMergeableConst4Section() const { |
| return MergeableConst4Section; |
| } |
| const MCSection *getMergeableConst8Section() const { |
| return MergeableConst8Section; |
| } |
| const MCSection *getMergeableConst16Section() const { |
| return MergeableConst16Section; |
| } |
| |
| /// MachO specific sections. |
| /// |
| const MCSection *getTLSTLVSection() const { return TLSTLVSection; } |
| const MCSection *getTLSThreadInitSection() const { |
| return TLSThreadInitSection; |
| } |
| const MCSection *getCStringSection() const { return CStringSection; } |
| const MCSection *getUStringSection() const { return UStringSection; } |
| const MCSection *getTextCoalSection() const { return TextCoalSection; } |
| const MCSection *getConstTextCoalSection() const { |
| return ConstTextCoalSection; |
| } |
| const MCSection *getConstDataSection() const { return ConstDataSection; } |
| const MCSection *getDataCoalSection() const { return DataCoalSection; } |
| const MCSection *getDataCommonSection() const { return DataCommonSection; } |
| const MCSection *getDataBSSSection() const { return DataBSSSection; } |
| const MCSection *getFourByteConstantSection() const { |
| return FourByteConstantSection; |
| } |
| const MCSection *getEightByteConstantSection() const { |
| return EightByteConstantSection; |
| } |
| const MCSection *getSixteenByteConstantSection() const { |
| return SixteenByteConstantSection; |
| } |
| const MCSection *getLazySymbolPointerSection() const { |
| return LazySymbolPointerSection; |
| } |
| const MCSection *getNonLazySymbolPointerSection() const { |
| return NonLazySymbolPointerSection; |
| } |
| |
| /// COFF specific sections. |
| /// |
| const MCSection *getDrectveSection() const { return DrectveSection; } |
| const MCSection *getPDataSection() const { return PDataSection; } |
| const MCSection *getXDataSection() const { return XDataSection; } |
| |
| const MCSection *getEHFrameSection() { |
| if (!EHFrameSection) |
| InitEHFrameSection(); |
| return EHFrameSection; |
| } |
| |
| enum Environment { IsMachO, IsELF, IsCOFF }; |
| Environment getObjectFileType() const { |
| return Env; |
| } |
| |
| Reloc::Model getRelocM() const { |
| return RelocM; |
| } |
| |
| private: |
| Environment Env; |
| Reloc::Model RelocM; |
| CodeModel::Model CMModel; |
| MCContext *Ctx; |
| Triple TT; |
| |
| void InitMachOMCObjectFileInfo(Triple T); |
| void InitELFMCObjectFileInfo(Triple T); |
| void InitCOFFMCObjectFileInfo(Triple T); |
| |
| /// InitEHFrameSection - Initialize EHFrameSection on demand. |
| /// |
| void InitEHFrameSection(); |
| |
| public: |
| const Triple &getTargetTriple() const { return TT; } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |