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Diffstat (limited to 'clang-r353983e/include/llvm/MC/MCObjectFileInfo.h')
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1 files changed, 413 insertions, 0 deletions
diff --git a/clang-r353983e/include/llvm/MC/MCObjectFileInfo.h b/clang-r353983e/include/llvm/MC/MCObjectFileInfo.h new file mode 100644 index 00000000..0c1ade48 --- /dev/null +++ b/clang-r353983e/include/llvm/MC/MCObjectFileInfo.h @@ -0,0 +1,413 @@ +//===-- 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; + + /// True if target object file supports a weak_definition of constant 0 for an + /// omitted EH frame. + bool SupportsWeakOmittedEHFrame; + + /// True if the target object file supports emitting a compact unwind section + /// without an associated EH frame section. + bool SupportsCompactUnwindWithoutEHFrame; + + /// OmitDwarfIfHaveCompactUnwind - True if the target object file + /// supports having some functions with compact unwind and other with + /// dwarf unwind. + bool OmitDwarfIfHaveCompactUnwind; + + /// 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; + + /// Section directive for standard text. + MCSection *TextSection; + + /// Section directive for standard data. + MCSection *DataSection; + + /// Section that is default initialized to zero. + MCSection *BSSSection; + + /// 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; + + /// If exception handling is supported by the target, this is the section the + /// Language Specific Data Area information is emitted to. + MCSection *LSDASection; + + /// 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; + + // Dwarf sections for debug info. If a target supports debug info, these must + // be set. + MCSection *DwarfAbbrevSection; + MCSection *DwarfInfoSection; + MCSection *DwarfLineSection; + MCSection *DwarfLineStrSection; + MCSection *DwarfFrameSection; + MCSection *DwarfPubTypesSection; + const MCSection *DwarfDebugInlineSection; + MCSection *DwarfStrSection; + MCSection *DwarfLocSection; + MCSection *DwarfARangesSection; + MCSection *DwarfRangesSection; + MCSection *DwarfMacinfoSection; + // The pubnames section is no longer generated by default. The generation + // can be enabled by a compiler flag. + MCSection *DwarfPubNamesSection; + + /// Accelerator table sections. DwarfDebugNamesSection is the DWARF v5 + /// accelerator table, while DwarfAccelNamesSection, DwarfAccelObjCSection, + /// DwarfAccelNamespaceSection, DwarfAccelTypesSection are pre-DWARF v5 + /// extensions. + MCSection *DwarfDebugNamesSection; + MCSection *DwarfAccelNamesSection; + MCSection *DwarfAccelObjCSection; + MCSection *DwarfAccelNamespaceSection; + MCSection *DwarfAccelTypesSection; + + // These are used for the Fission separate debug information files. + MCSection *DwarfInfoDWOSection; + MCSection *DwarfTypesDWOSection; + MCSection *DwarfAbbrevDWOSection; + MCSection *DwarfStrDWOSection; + MCSection *DwarfLineDWOSection; + MCSection *DwarfLocDWOSection; + MCSection *DwarfStrOffDWOSection; + + /// The DWARF v5 string offset and address table sections. + MCSection *DwarfStrOffSection; + MCSection *DwarfAddrSection; + /// The DWARF v5 range list section. + MCSection *DwarfRnglistsSection; + /// The DWARF v5 locations list section. + MCSection *DwarfLoclistsSection; + + /// The DWARF v5 range list section for fission. + MCSection *DwarfRnglistsDWOSection; + + // These are for Fission DWP files. + MCSection *DwarfCUIndexSection; + MCSection *DwarfTUIndexSection; + + /// Section for newer gnu pubnames. + MCSection *DwarfGnuPubNamesSection; + /// Section for newer gnu pubtypes. + MCSection *DwarfGnuPubTypesSection; + + // Section for Swift AST + MCSection *DwarfSwiftASTSection; + + MCSection *COFFDebugSymbolsSection; + MCSection *COFFDebugTypesSection; + MCSection *COFFGlobalTypeHashesSection; + + /// Extra TLS Variable Data section. + /// + /// If the target needs to put additional information for a TLS variable, + /// it'll go here. + MCSection *TLSExtraDataSection; + + /// Section directive for Thread Local data. ELF, MachO, COFF, and Wasm. + MCSection *TLSDataSection; // 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; // Defaults to ".tbss". + + /// StackMap section. + MCSection *StackMapSection; + + /// FaultMap section. + MCSection *FaultMapSection; + + /// EH frame section. + /// + /// It is initialized on demand so it can be overwritten (with uniquing). + MCSection *EHFrameSection; + + /// Section containing metadata on function stack sizes. + MCSection *StackSizesSection; + mutable DenseMap<const MCSymbol *, unsigned> StackSizesUniquing; + + // ELF specific sections. + MCSection *DataRelROSection; + MCSection *MergeableConst4Section; + MCSection *MergeableConst8Section; + MCSection *MergeableConst16Section; + MCSection *MergeableConst32Section; + + // 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; // Defaults to ".tlv". + + /// Section for thread local data initialization functions. + const MCSection *TLSThreadInitSection; // Defaults to ".thread_init_func". + + MCSection *CStringSection; + MCSection *UStringSection; + MCSection *TextCoalSection; + MCSection *ConstTextCoalSection; + MCSection *ConstDataSection; + MCSection *DataCoalSection; + MCSection *ConstDataCoalSection; + MCSection *DataCommonSection; + MCSection *DataBSSSection; + MCSection *FourByteConstantSection; + MCSection *EightByteConstantSection; + MCSection *SixteenByteConstantSection; + MCSection *LazySymbolPointerSection; + MCSection *NonLazySymbolPointerSection; + MCSection *ThreadLocalPointerSection; + + /// COFF specific sections. + MCSection *DrectveSection; + MCSection *PDataSection; + MCSection *XDataSection; + MCSection *SXDataSection; + MCSection *GFIDsSection; + +public: + void InitMCObjectFileInfo(const Triple &TT, bool PIC, MCContext &ctx, + bool LargeCodeModel = false); + + 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; + } + + 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 *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 *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 *getStackSizesSection(const MCSection &TextSec) 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 *getGFIDsSection() const { return GFIDsSection; } + + MCSection *getEHFrameSection() { + return EHFrameSection; + } + + enum Environment { IsMachO, IsELF, IsCOFF, IsWasm }; + Environment getObjectFileType() const { return Env; } + + bool isPositionIndependent() const { return PositionIndependent; } + +private: + Environment Env; + bool PositionIndependent; + MCContext *Ctx; + Triple TT; + VersionTuple SDKVersion; + + void initMachOMCObjectFileInfo(const Triple &T); + void initELFMCObjectFileInfo(const Triple &T, bool Large); + void initCOFFMCObjectFileInfo(const Triple &T); + void initWasmMCObjectFileInfo(const Triple &T); + MCSection *getDwarfComdatSection(const char *Name, uint64_t Hash) const; + +public: + const Triple &getTargetTriple() const { return TT; } + + void setSDKVersion(const VersionTuple &TheSDKVersion) { + SDKVersion = TheSDKVersion; + } + + const VersionTuple &getSDKVersion() const { return SDKVersion; } +}; + +} // end namespace llvm + +#endif |