| //===-- llvm/MC/MCObjectFileInfo.h - Object File Info -----------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file describes common object file formats. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCOBJECTFILEINFO_H |
| #define LLVM_MC_MCOBJECTFILEINFO_H |
| |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/MC/MCSymbol.h" |
| #include "llvm/Support/CodeGen.h" |
| #include "llvm/Support/VersionTuple.h" |
| |
| namespace llvm { |
| class MCContext; |
| class MCSection; |
| |
| class MCObjectFileInfo { |
| protected: |
| /// 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 = false; |
| |
| /// True if target object file supports a weak_definition of constant 0 for an |
| /// omitted EH frame. |
| bool SupportsWeakOmittedEHFrame = false; |
| |
| /// True if the target object file supports emitting a compact unwind section |
| /// without an associated EH frame section. |
| bool SupportsCompactUnwindWithoutEHFrame = false; |
| |
| /// OmitDwarfIfHaveCompactUnwind - True if the target object file |
| /// supports having some functions with compact unwind and other with |
| /// dwarf unwind. |
| bool OmitDwarfIfHaveCompactUnwind = false; |
| |
| /// FDE CFI encoding. Controls the encoding of the begin label in the |
| /// .eh_frame section. Unlike the LSDA encoding, personality encoding, and |
| /// type encodings, this is something that the assembler just "knows" about |
| /// its target |
| unsigned FDECFIEncoding = 0; |
| |
| /// Compact unwind encoding indicating that we should emit only an EH frame. |
| unsigned CompactUnwindDwarfEHFrameOnly = 0; |
| |
| /// Section directive for standard text. |
| MCSection *TextSection = nullptr; |
| |
| /// Section directive for standard data. |
| MCSection *DataSection = nullptr; |
| |
| /// Section that is default initialized to zero. |
| MCSection *BSSSection = nullptr; |
| |
| /// 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. |
| MCSection *ReadOnlySection = nullptr; |
| |
| /// If exception handling is supported by the target, this is the section the |
| /// Language Specific Data Area information is emitted to. |
| MCSection *LSDASection = nullptr; |
| |
| /// 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. |
| MCSection *CompactUnwindSection = nullptr; |
| |
| // Dwarf sections for debug info. If a target supports debug info, these must |
| // be set. |
| MCSection *DwarfAbbrevSection = nullptr; |
| MCSection *DwarfInfoSection = nullptr; |
| MCSection *DwarfLineSection = nullptr; |
| MCSection *DwarfLineStrSection = nullptr; |
| MCSection *DwarfFrameSection = nullptr; |
| MCSection *DwarfPubTypesSection = nullptr; |
| const MCSection *DwarfDebugInlineSection = nullptr; |
| MCSection *DwarfStrSection = nullptr; |
| MCSection *DwarfLocSection = nullptr; |
| MCSection *DwarfARangesSection = nullptr; |
| MCSection *DwarfRangesSection = nullptr; |
| MCSection *DwarfMacinfoSection = nullptr; |
| MCSection *DwarfMacroSection = nullptr; |
| // The pubnames section is no longer generated by default. The generation |
| // can be enabled by a compiler flag. |
| MCSection *DwarfPubNamesSection = nullptr; |
| |
| /// Accelerator table sections. DwarfDebugNamesSection is the DWARF v5 |
| /// accelerator table, while DwarfAccelNamesSection, DwarfAccelObjCSection, |
| /// DwarfAccelNamespaceSection, DwarfAccelTypesSection are pre-DWARF v5 |
| /// extensions. |
| MCSection *DwarfDebugNamesSection = nullptr; |
| MCSection *DwarfAccelNamesSection = nullptr; |
| MCSection *DwarfAccelObjCSection = nullptr; |
| MCSection *DwarfAccelNamespaceSection = nullptr; |
| MCSection *DwarfAccelTypesSection = nullptr; |
| |
| // These are used for the Fission separate debug information files. |
| MCSection *DwarfInfoDWOSection = nullptr; |
| MCSection *DwarfTypesDWOSection = nullptr; |
| MCSection *DwarfAbbrevDWOSection = nullptr; |
| MCSection *DwarfStrDWOSection = nullptr; |
| MCSection *DwarfLineDWOSection = nullptr; |
| MCSection *DwarfLocDWOSection = nullptr; |
| MCSection *DwarfStrOffDWOSection = nullptr; |
| MCSection *DwarfMacinfoDWOSection = nullptr; |
| MCSection *DwarfMacroDWOSection = nullptr; |
| |
| /// The DWARF v5 string offset and address table sections. |
| MCSection *DwarfStrOffSection = nullptr; |
| MCSection *DwarfAddrSection = nullptr; |
| /// The DWARF v5 range list section. |
| MCSection *DwarfRnglistsSection = nullptr; |
| /// The DWARF v5 locations list section. |
| MCSection *DwarfLoclistsSection = nullptr; |
| |
| /// The DWARF v5 range and location list sections for fission. |
| MCSection *DwarfRnglistsDWOSection = nullptr; |
| MCSection *DwarfLoclistsDWOSection = nullptr; |
| |
| // These are for Fission DWP files. |
| MCSection *DwarfCUIndexSection = nullptr; |
| MCSection *DwarfTUIndexSection = nullptr; |
| |
| /// Section for newer gnu pubnames. |
| MCSection *DwarfGnuPubNamesSection = nullptr; |
| /// Section for newer gnu pubtypes. |
| MCSection *DwarfGnuPubTypesSection = nullptr; |
| |
| // Section for Swift AST |
| MCSection *DwarfSwiftASTSection = nullptr; |
| |
| MCSection *COFFDebugSymbolsSection = nullptr; |
| MCSection *COFFDebugTypesSection = nullptr; |
| MCSection *COFFGlobalTypeHashesSection = nullptr; |
| |
| /// Extra TLS Variable Data section. |
| /// |
| /// If the target needs to put additional information for a TLS variable, |
| /// it'll go here. |
| MCSection *TLSExtraDataSection = nullptr; |
| |
| /// Section directive for Thread Local data. ELF, MachO, COFF, and Wasm. |
| MCSection *TLSDataSection = nullptr; // Defaults to ".tdata". |
| |
| /// Section directive for Thread Local uninitialized data. |
| /// |
| /// Null if this target doesn't support a BSS section. ELF and MachO only. |
| MCSection *TLSBSSSection = nullptr; // Defaults to ".tbss". |
| |
| /// StackMap section. |
| MCSection *StackMapSection = nullptr; |
| |
| /// FaultMap section. |
| MCSection *FaultMapSection = nullptr; |
| |
| /// Remarks section. |
| MCSection *RemarksSection = nullptr; |
| |
| /// EH frame section. |
| /// |
| /// It is initialized on demand so it can be overwritten (with uniquing). |
| MCSection *EHFrameSection = nullptr; |
| |
| /// Section containing metadata on function stack sizes. |
| MCSection *StackSizesSection = nullptr; |
| |
| /// Section for pseudo probe information used by AutoFDO |
| MCSection *PseudoProbeSection = nullptr; |
| MCSection *PseudoProbeDescSection = nullptr; |
| |
| // ELF specific sections. |
| MCSection *DataRelROSection = nullptr; |
| MCSection *MergeableConst4Section = nullptr; |
| MCSection *MergeableConst8Section = nullptr; |
| MCSection *MergeableConst16Section = nullptr; |
| MCSection *MergeableConst32Section = nullptr; |
| |
| // MachO specific sections. |
| |
| /// 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). |
| MCSection *TLSTLVSection = nullptr; // Defaults to ".tlv". |
| |
| /// Section for thread local data initialization functions. |
| // Defaults to ".thread_init_func". |
| const MCSection *TLSThreadInitSection = nullptr; |
| |
| MCSection *CStringSection = nullptr; |
| MCSection *UStringSection = nullptr; |
| MCSection *TextCoalSection = nullptr; |
| MCSection *ConstTextCoalSection = nullptr; |
| MCSection *ConstDataSection = nullptr; |
| MCSection *DataCoalSection = nullptr; |
| MCSection *ConstDataCoalSection = nullptr; |
| MCSection *DataCommonSection = nullptr; |
| MCSection *DataBSSSection = nullptr; |
| MCSection *FourByteConstantSection = nullptr; |
| MCSection *EightByteConstantSection = nullptr; |
| MCSection *SixteenByteConstantSection = nullptr; |
| MCSection *LazySymbolPointerSection = nullptr; |
| MCSection *NonLazySymbolPointerSection = nullptr; |
| MCSection *ThreadLocalPointerSection = nullptr; |
| |
| /// COFF specific sections. |
| MCSection *DrectveSection = nullptr; |
| MCSection *PDataSection = nullptr; |
| MCSection *XDataSection = nullptr; |
| MCSection *SXDataSection = nullptr; |
| MCSection *GEHContSection = nullptr; |
| MCSection *GFIDsSection = nullptr; |
| MCSection *GIATsSection = nullptr; |
| MCSection *GLJMPSection = nullptr; |
| |
| // XCOFF specific sections |
| MCSection *TOCBaseSection = nullptr; |
| MCSection *ReadOnly8Section = nullptr; |
| MCSection *ReadOnly16Section = nullptr; |
| |
| public: |
| void initMCObjectFileInfo(MCContext &MCCtx, bool PIC, |
| bool LargeCodeModel = false); |
| virtual ~MCObjectFileInfo(); |
| MCContext &getContext() const { return *Ctx; } |
| |
| bool getSupportsWeakOmittedEHFrame() const { |
| return SupportsWeakOmittedEHFrame; |
| } |
| bool getSupportsCompactUnwindWithoutEHFrame() const { |
| return SupportsCompactUnwindWithoutEHFrame; |
| } |
| bool getOmitDwarfIfHaveCompactUnwind() const { |
| return OmitDwarfIfHaveCompactUnwind; |
| } |
| |
| bool getCommDirectiveSupportsAlignment() const { |
| return CommDirectiveSupportsAlignment; |
| } |
| |
| unsigned getFDEEncoding() const { return FDECFIEncoding; } |
| |
| unsigned getCompactUnwindDwarfEHFrameOnly() const { |
| return CompactUnwindDwarfEHFrameOnly; |
| } |
| |
| virtual unsigned getTextSectionAlignment() const { return 4; } |
| MCSection *getTextSection() const { return TextSection; } |
| MCSection *getDataSection() const { return DataSection; } |
| MCSection *getBSSSection() const { return BSSSection; } |
| MCSection *getReadOnlySection() const { return ReadOnlySection; } |
| MCSection *getLSDASection() const { return LSDASection; } |
| MCSection *getCompactUnwindSection() const { return CompactUnwindSection; } |
| MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; } |
| MCSection *getDwarfInfoSection() const { return DwarfInfoSection; } |
| MCSection *getDwarfInfoSection(uint64_t Hash) const { |
| return getDwarfComdatSection(".debug_info", Hash); |
| } |
| MCSection *getDwarfLineSection() const { return DwarfLineSection; } |
| MCSection *getDwarfLineStrSection() const { return DwarfLineStrSection; } |
| MCSection *getDwarfFrameSection() const { return DwarfFrameSection; } |
| MCSection *getDwarfPubNamesSection() const { return DwarfPubNamesSection; } |
| MCSection *getDwarfPubTypesSection() const { return DwarfPubTypesSection; } |
| MCSection *getDwarfGnuPubNamesSection() const { |
| return DwarfGnuPubNamesSection; |
| } |
| MCSection *getDwarfGnuPubTypesSection() const { |
| return DwarfGnuPubTypesSection; |
| } |
| const MCSection *getDwarfDebugInlineSection() const { |
| return DwarfDebugInlineSection; |
| } |
| MCSection *getDwarfStrSection() const { return DwarfStrSection; } |
| MCSection *getDwarfLocSection() const { return DwarfLocSection; } |
| MCSection *getDwarfARangesSection() const { return DwarfARangesSection; } |
| MCSection *getDwarfRangesSection() const { return DwarfRangesSection; } |
| MCSection *getDwarfRnglistsSection() const { return DwarfRnglistsSection; } |
| MCSection *getDwarfLoclistsSection() const { return DwarfLoclistsSection; } |
| MCSection *getDwarfMacinfoSection() const { return DwarfMacinfoSection; } |
| MCSection *getDwarfMacroSection() const { return DwarfMacroSection; } |
| |
| MCSection *getDwarfDebugNamesSection() const { |
| return DwarfDebugNamesSection; |
| } |
| MCSection *getDwarfAccelNamesSection() const { |
| return DwarfAccelNamesSection; |
| } |
| MCSection *getDwarfAccelObjCSection() const { return DwarfAccelObjCSection; } |
| MCSection *getDwarfAccelNamespaceSection() const { |
| return DwarfAccelNamespaceSection; |
| } |
| MCSection *getDwarfAccelTypesSection() const { |
| return DwarfAccelTypesSection; |
| } |
| MCSection *getDwarfInfoDWOSection() const { return DwarfInfoDWOSection; } |
| MCSection *getDwarfTypesSection(uint64_t Hash) const { |
| return getDwarfComdatSection(".debug_types", Hash); |
| } |
| MCSection *getDwarfTypesDWOSection() const { return DwarfTypesDWOSection; } |
| MCSection *getDwarfAbbrevDWOSection() const { return DwarfAbbrevDWOSection; } |
| MCSection *getDwarfStrDWOSection() const { return DwarfStrDWOSection; } |
| MCSection *getDwarfLineDWOSection() const { return DwarfLineDWOSection; } |
| MCSection *getDwarfLocDWOSection() const { return DwarfLocDWOSection; } |
| MCSection *getDwarfStrOffDWOSection() const { return DwarfStrOffDWOSection; } |
| MCSection *getDwarfStrOffSection() const { return DwarfStrOffSection; } |
| MCSection *getDwarfAddrSection() const { return DwarfAddrSection; } |
| MCSection *getDwarfRnglistsDWOSection() const { |
| return DwarfRnglistsDWOSection; |
| } |
| MCSection *getDwarfLoclistsDWOSection() const { |
| return DwarfLoclistsDWOSection; |
| } |
| MCSection *getDwarfMacroDWOSection() const { return DwarfMacroDWOSection; } |
| MCSection *getDwarfMacinfoDWOSection() const { |
| return DwarfMacinfoDWOSection; |
| } |
| MCSection *getDwarfCUIndexSection() const { return DwarfCUIndexSection; } |
| MCSection *getDwarfTUIndexSection() const { return DwarfTUIndexSection; } |
| MCSection *getDwarfSwiftASTSection() const { return DwarfSwiftASTSection; } |
| |
| MCSection *getCOFFDebugSymbolsSection() const { |
| return COFFDebugSymbolsSection; |
| } |
| MCSection *getCOFFDebugTypesSection() const { |
| return COFFDebugTypesSection; |
| } |
| MCSection *getCOFFGlobalTypeHashesSection() const { |
| return COFFGlobalTypeHashesSection; |
| } |
| |
| MCSection *getTLSExtraDataSection() const { return TLSExtraDataSection; } |
| const MCSection *getTLSDataSection() const { return TLSDataSection; } |
| MCSection *getTLSBSSSection() const { return TLSBSSSection; } |
| |
| MCSection *getStackMapSection() const { return StackMapSection; } |
| MCSection *getFaultMapSection() const { return FaultMapSection; } |
| MCSection *getRemarksSection() const { return RemarksSection; } |
| |
| MCSection *getStackSizesSection(const MCSection &TextSec) const; |
| |
| MCSection *getBBAddrMapSection(const MCSection &TextSec) const; |
| |
| MCSection *getPseudoProbeSection(const MCSection *TextSec) const; |
| |
| MCSection *getPseudoProbeDescSection(StringRef FuncName) const; |
| |
| // ELF specific sections. |
| MCSection *getDataRelROSection() const { return DataRelROSection; } |
| const MCSection *getMergeableConst4Section() const { |
| return MergeableConst4Section; |
| } |
| const MCSection *getMergeableConst8Section() const { |
| return MergeableConst8Section; |
| } |
| const MCSection *getMergeableConst16Section() const { |
| return MergeableConst16Section; |
| } |
| const MCSection *getMergeableConst32Section() const { |
| return MergeableConst32Section; |
| } |
| |
| // 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; } |
| 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 *getConstDataCoalSection() const { |
| return ConstDataCoalSection; |
| } |
| const MCSection *getDataCommonSection() const { return DataCommonSection; } |
| MCSection *getDataBSSSection() const { return DataBSSSection; } |
| const MCSection *getFourByteConstantSection() const { |
| return FourByteConstantSection; |
| } |
| const MCSection *getEightByteConstantSection() const { |
| return EightByteConstantSection; |
| } |
| const MCSection *getSixteenByteConstantSection() const { |
| return SixteenByteConstantSection; |
| } |
| MCSection *getLazySymbolPointerSection() const { |
| return LazySymbolPointerSection; |
| } |
| MCSection *getNonLazySymbolPointerSection() const { |
| return NonLazySymbolPointerSection; |
| } |
| MCSection *getThreadLocalPointerSection() const { |
| return ThreadLocalPointerSection; |
| } |
| |
| // COFF specific sections. |
| MCSection *getDrectveSection() const { return DrectveSection; } |
| MCSection *getPDataSection() const { return PDataSection; } |
| MCSection *getXDataSection() const { return XDataSection; } |
| MCSection *getSXDataSection() const { return SXDataSection; } |
| MCSection *getGEHContSection() const { return GEHContSection; } |
| MCSection *getGFIDsSection() const { return GFIDsSection; } |
| MCSection *getGIATsSection() const { return GIATsSection; } |
| MCSection *getGLJMPSection() const { return GLJMPSection; } |
| |
| // XCOFF specific sections |
| MCSection *getTOCBaseSection() const { return TOCBaseSection; } |
| |
| MCSection *getEHFrameSection() const { return EHFrameSection; } |
| |
| bool isPositionIndependent() const { return PositionIndependent; } |
| |
| private: |
| bool PositionIndependent = false; |
| MCContext *Ctx = nullptr; |
| VersionTuple SDKVersion; |
| |
| void initMachOMCObjectFileInfo(const Triple &T); |
| void initELFMCObjectFileInfo(const Triple &T, bool Large); |
| void initGOFFMCObjectFileInfo(const Triple &T); |
| void initCOFFMCObjectFileInfo(const Triple &T); |
| void initWasmMCObjectFileInfo(const Triple &T); |
| void initXCOFFMCObjectFileInfo(const Triple &T); |
| MCSection *getDwarfComdatSection(const char *Name, uint64_t Hash) const; |
| |
| public: |
| void setSDKVersion(const VersionTuple &TheSDKVersion) { |
| SDKVersion = TheSDKVersion; |
| } |
| |
| const VersionTuple &getSDKVersion() const { return SDKVersion; } |
| }; |
| |
| } // end namespace llvm |
| |
| #endif |