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Diffstat (limited to 'include/llvm/MC/MCAsmInfo.h')
| -rw-r--r-- | include/llvm/MC/MCAsmInfo.h | 1006 |
1 files changed, 478 insertions, 528 deletions
diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h index f7d3be2..06e473d 100644 --- a/include/llvm/MC/MCAsmInfo.h +++ b/include/llvm/MC/MCAsmInfo.h @@ -23,546 +23,496 @@ #include <vector> namespace llvm { - class MCExpr; - class MCSection; - class MCStreamer; - class MCSymbol; - class MCContext; - - namespace ExceptionHandling { - enum ExceptionsType { None, DwarfCFI, SjLj, ARM, Win64 }; +class MCExpr; +class MCSection; +class MCStreamer; +class MCSymbol; +class MCContext; + +namespace WinEH { +enum class EncodingType { + ET_Invalid, /// Invalid + ET_Alpha, /// Windows Alpha + ET_Alpha64, /// Windows AXP64 + ET_ARM, /// Windows NT (Windows on ARM) + ET_CE, /// Windows CE ARM, PowerPC, SH3, SH4 + ET_Itanium, /// Windows x64, Windows Itanium (IA-64) + ET_MIPS = ET_Alpha, +}; +} + +enum class ExceptionHandling { + None, /// No exception support + DwarfCFI, /// DWARF-like instruction based exceptions + SjLj, /// setjmp/longjmp based exceptions + ARM, /// ARM EHABI + WinEH, /// Windows Exception Handling +}; + +namespace LCOMM { +enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment }; +} + +/// This class is intended to be used as a base class for asm +/// properties and features specific to the target. +class MCAsmInfo { +protected: + //===------------------------------------------------------------------===// + // Properties to be set by the target writer, used to configure asm printer. + // + + /// Pointer size in bytes. Default is 4. + unsigned PointerSize; + + /// Size of the stack slot reserved for callee-saved registers, in bytes. + /// Default is same as pointer size. + unsigned CalleeSaveStackSlotSize; + + /// True if target is little endian. Default is true. + bool IsLittleEndian; + + /// True if target stack grow up. Default is false. + bool StackGrowsUp; + + /// True if this target has the MachO .subsections_via_symbols directive. + /// Default is false. + bool HasSubsectionsViaSymbols; + + /// True if this is a MachO target that supports the macho-specific .zerofill + /// directive for emitting BSS Symbols. Default is false. + bool HasMachoZeroFillDirective; + + /// True if this is a MachO target that supports the macho-specific .tbss + /// directive for emitting thread local BSS Symbols. Default is false. + bool HasMachoTBSSDirective; + + /// True if the compiler should emit a ".reference .constructors_used" or + /// ".reference .destructors_used" directive after the a static ctor/dtor + /// list. This directive is only emitted in Static relocation model. Default + /// is false. + bool HasStaticCtorDtorReferenceInStaticMode; + + /// True if the linker has a bug and requires that the debug_line section be + /// of a minimum size. In practice such a linker requires a non-empty line + /// sequence if a file is present. Default to false. + bool LinkerRequiresNonEmptyDwarfLines; + + /// This is the maximum possible length of an instruction, which is needed to + /// compute the size of an inline asm. Defaults to 4. + unsigned MaxInstLength; + + /// Every possible instruction length is a multiple of this value. Factored + /// out in .debug_frame and .debug_line. Defaults to 1. + unsigned MinInstAlignment; + + /// The '$' token, when not referencing an identifier or constant, refers to + /// the current PC. Defaults to false. + bool DollarIsPC; + + /// This string, if specified, is used to separate instructions from each + /// other when on the same line. Defaults to ';' + const char *SeparatorString; + + /// This indicates the comment character used by the assembler. Defaults to + /// "#" + const char *CommentString; + + /// This is appended to emitted labels. Defaults to ":" + const char *LabelSuffix; + + // Print the EH begin symbol with an assignment. Defaults to false. + bool UseAssignmentForEHBegin; + + /// This prefix is used for globals like constant pool entries that are + /// completely private to the .s file and should not have names in the .o + /// file. Defaults to "L" + const char *PrivateGlobalPrefix; + + /// This prefix is used for symbols that should be passed through the + /// assembler but be removed by the linker. This is 'l' on Darwin, currently + /// used for some ObjC metadata. The default of "" meast that for this system + /// a plain private symbol should be used. Defaults to "". + const char *LinkerPrivateGlobalPrefix; + + /// If these are nonempty, they contain a directive to emit before and after + /// an inline assembly statement. Defaults to "#APP\n", "#NO_APP\n" + const char *InlineAsmStart; + const char *InlineAsmEnd; + + /// These are assembly directives that tells the assembler to interpret the + /// following instructions differently. Defaults to ".code16", ".code32", + /// ".code64". + const char *Code16Directive; + const char *Code32Directive; + const char *Code64Directive; + + /// Which dialect of an assembler variant to use. Defaults to 0 + unsigned AssemblerDialect; + + /// This is true if the assembler allows @ characters in symbol names. + /// Defaults to false. + bool AllowAtInName; + + /// This is true if data region markers should be printed as + /// ".data_region/.end_data_region" directives. If false, use "$d/$a" labels + /// instead. + bool UseDataRegionDirectives; + + //===--- Data Emission Directives -------------------------------------===// + + /// This should be set to the directive used to get some number of zero bytes + /// emitted to the current section. Common cases are "\t.zero\t" and + /// "\t.space\t". If this is set to null, the Data*bitsDirective's will be + /// used to emit zero bytes. Defaults to "\t.zero\t" + const char *ZeroDirective; + + /// This directive allows emission of an ascii string with the standard C + /// escape characters embedded into it. Defaults to "\t.ascii\t" + const char *AsciiDirective; + + /// If not null, this allows for special handling of zero terminated strings + /// on this target. This is commonly supported as ".asciz". If a target + /// doesn't support this, it can be set to null. Defaults to "\t.asciz\t" + const char *AscizDirective; + + /// These directives are used to output some unit of integer data to the + /// current section. If a data directive is set to null, smaller data + /// directives will be used to emit the large sizes. Defaults to "\t.byte\t", + /// "\t.short\t", "\t.long\t", "\t.quad\t" + const char *Data8bitsDirective; + const char *Data16bitsDirective; + const char *Data32bitsDirective; + const char *Data64bitsDirective; + + /// If non-null, a directive that is used to emit a word which should be + /// relocated as a 64-bit GP-relative offset, e.g. .gpdword on Mips. Defaults + /// to NULL. + const char *GPRel64Directive; + + /// If non-null, a directive that is used to emit a word which should be + /// relocated as a 32-bit GP-relative offset, e.g. .gpword on Mips or .gprel32 + /// on Alpha. Defaults to NULL. + const char *GPRel32Directive; + + /// This is true if this target uses "Sun Style" syntax for section switching + /// ("#alloc,#write" etc) instead of the normal ELF syntax (,"a,w") in + /// .section directives. Defaults to false. + bool SunStyleELFSectionSwitchSyntax; + + /// This is true if this target uses ELF '.section' directive before the + /// '.bss' one. It's used for PPC/Linux which doesn't support the '.bss' + /// directive only. Defaults to false. + bool UsesELFSectionDirectiveForBSS; + + bool NeedsDwarfSectionOffsetDirective; + + //===--- Alignment Information ----------------------------------------===// + + /// If this is true (the default) then the asmprinter emits ".align N" + /// directives, where N is the number of bytes to align to. Otherwise, it + /// emits ".align log2(N)", e.g. 3 to align to an 8 byte boundary. Defaults + /// to true. + bool AlignmentIsInBytes; + + /// If non-zero, this is used to fill the executable space created as the + /// result of a alignment directive. Defaults to 0 + unsigned TextAlignFillValue; + + //===--- Global Variable Emission Directives --------------------------===// + + /// This is the directive used to declare a global entity. Defaults to NULL. + const char *GlobalDirective; + + /// True if the assembler supports the .set directive. Defaults to true. + bool HasSetDirective; + + /// False if the assembler requires that we use + /// \code + /// Lc = a - b + /// .long Lc + /// \endcode + // + /// instead of + // + /// \code + /// .long a - b + /// \endcode + /// + /// Defaults to true. + bool HasAggressiveSymbolFolding; + + /// True is .comm's and .lcomms optional alignment is to be specified in bytes + /// instead of log2(n). Defaults to true. + bool COMMDirectiveAlignmentIsInBytes; + + /// Describes if the .lcomm directive for the target supports an alignment + /// argument and how it is interpreted. Defaults to NoAlignment. + LCOMM::LCOMMType LCOMMDirectiveAlignmentType; + + /// True if the target has .type and .size directives, this is true for most + /// ELF targets. Defaults to true. + bool HasDotTypeDotSizeDirective; + + /// True if the target has a single parameter .file directive, this is true + /// for ELF targets. Defaults to true. + bool HasSingleParameterDotFile; + + /// True if the target has a .ident directive, this is true for ELF targets. + /// Defaults to false. + bool HasIdentDirective; + + /// True if this target supports the MachO .no_dead_strip directive. Defaults + /// to false. + bool HasNoDeadStrip; + + /// This directive, if non-null, is used to declare a global as being a weak + /// undefined symbol. Defaults to NULL. + const char *WeakRefDirective; + + /// True if we have a directive to declare a global as being a weak defined + /// symbol. Defaults to false. + bool HasWeakDefDirective; + + /// True if we have a directive to declare a global as being a weak defined + /// symbol that can be hidden (unexported). Defaults to false. + bool HasWeakDefCanBeHiddenDirective; + + /// True if we have a .linkonce directive. This is used on cygwin/mingw. + /// Defaults to false. + bool HasLinkOnceDirective; + + /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having + /// hidden visibility. Defaults to MCSA_Hidden. + MCSymbolAttr HiddenVisibilityAttr; + + /// This attribute, if not MCSA_Invalid, is used to declare an undefined + /// symbol as having hidden visibility. Defaults to MCSA_Hidden. + MCSymbolAttr HiddenDeclarationVisibilityAttr; + + /// This attribute, if not MCSA_Invalid, is used to declare a symbol as having + /// protected visibility. Defaults to MCSA_Protected + MCSymbolAttr ProtectedVisibilityAttr; + + //===--- Dwarf Emission Directives -----------------------------------===// + + /// True if target asm supports leb128 directives. Defaults to false. + bool HasLEB128; + + /// True if target supports emission of debugging information. Defaults to + /// false. + bool SupportsDebugInformation; + + /// Exception handling format for the target. Defaults to None. + ExceptionHandling ExceptionsType; + + /// Windows exception handling data (.pdata) encoding. Defaults to Invalid. + WinEH::EncodingType WinEHEncodingType; + + /// True if Dwarf2 output generally uses relocations for references to other + /// .debug_* sections. + bool DwarfUsesRelocationsAcrossSections; + + /// True if DWARF FDE symbol reference relocations should be replaced by an + /// absolute difference. + bool DwarfFDESymbolsUseAbsDiff; + + /// True if dwarf register numbers are printed instead of symbolic register + /// names in .cfi_* directives. Defaults to false. + bool DwarfRegNumForCFI; + + /// True if target uses parens to indicate the symbol variant instead of @. + /// For example, foo(plt) instead of foo@plt. Defaults to false. + bool UseParensForSymbolVariant; + + //===--- Prologue State ----------------------------------------------===// + + std::vector<MCCFIInstruction> InitialFrameState; + + //===--- Integrated Assembler State ----------------------------------===// + + /// Should we use the integrated assembler? + /// The integrated assembler should be enabled by default (by the + /// constructors) when failing to parse a valid piece of assembly (inline + /// or otherwise) is considered a bug. It may then be overridden after + /// construction (see LLVMTargetMachine::initAsmInfo()). + bool UseIntegratedAssembler; + + /// Compress DWARF debug sections. Defaults to false. + bool CompressDebugSections; + +public: + explicit MCAsmInfo(); + virtual ~MCAsmInfo(); + + /// Get the pointer size in bytes. + unsigned getPointerSize() const { return PointerSize; } + + /// Get the callee-saved register stack slot + /// size in bytes. + unsigned getCalleeSaveStackSlotSize() const { + return CalleeSaveStackSlotSize; } - namespace LCOMM { - enum LCOMMType { NoAlignment, ByteAlignment, Log2Alignment }; + /// True if the target is little endian. + bool isLittleEndian() const { return IsLittleEndian; } + + /// True if target stack grow up. + bool isStackGrowthDirectionUp() const { return StackGrowsUp; } + + bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } + + // Data directive accessors. + + const char *getData8bitsDirective() const { return Data8bitsDirective; } + const char *getData16bitsDirective() const { return Data16bitsDirective; } + const char *getData32bitsDirective() const { return Data32bitsDirective; } + const char *getData64bitsDirective() const { return Data64bitsDirective; } + const char *getGPRel64Directive() const { return GPRel64Directive; } + const char *getGPRel32Directive() const { return GPRel32Directive; } + + /// Targets can implement this method to specify a section to switch to if the + /// translation unit doesn't have any trampolines that require an executable + /// stack. + virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const { + return nullptr; } - /// MCAsmInfo - This class is intended to be used as a base class for asm - /// properties and features specific to the target. - class MCAsmInfo { - protected: - //===------------------------------------------------------------------===// - // Properties to be set by the target writer, used to configure asm printer. - // - - /// PointerSize - Pointer size in bytes. - /// Default is 4. - unsigned PointerSize; - - /// CalleeSaveStackSlotSize - Size of the stack slot reserved for - /// callee-saved registers, in bytes. - /// Default is same as pointer size. - unsigned CalleeSaveStackSlotSize; - - /// IsLittleEndian - True if target is little endian. - /// Default is true. - bool IsLittleEndian; - - /// StackGrowsUp - True if target stack grow up. - /// Default is false. - bool StackGrowsUp; - - /// HasSubsectionsViaSymbols - True if this target has the MachO - /// .subsections_via_symbols directive. - bool HasSubsectionsViaSymbols; // Default is false. - - /// HasMachoZeroFillDirective - True if this is a MachO target that supports - /// the macho-specific .zerofill directive for emitting BSS Symbols. - bool HasMachoZeroFillDirective; // Default is false. - - /// HasMachoTBSSDirective - True if this is a MachO target that supports - /// the macho-specific .tbss directive for emitting thread local BSS Symbols - bool HasMachoTBSSDirective; // Default is false. - - /// HasStaticCtorDtorReferenceInStaticMode - True if the compiler should - /// emit a ".reference .constructors_used" or ".reference .destructors_used" - /// directive after the a static ctor/dtor list. This directive is only - /// emitted in Static relocation model. - bool HasStaticCtorDtorReferenceInStaticMode; // Default is false. - - /// LinkerRequiresNonEmptyDwarfLines - True if the linker has a bug and - /// requires that the debug_line section be of a minimum size. In practice - /// such a linker requires a non-empty line sequence if a file is present. - bool LinkerRequiresNonEmptyDwarfLines; // Default to false. - - /// MaxInstLength - This is the maximum possible length of an instruction, - /// which is needed to compute the size of an inline asm. - unsigned MaxInstLength; // Defaults to 4. - - /// MinInstAlignment - Every possible instruction length is a multiple of - /// this value. Factored out in .debug_frame and .debug_line. - unsigned MinInstAlignment; // Defaults to 1. - - /// DollarIsPC - The '$' token, when not referencing an identifier or - /// constant, refers to the current PC. - bool DollarIsPC; // Defaults to false. - - /// SeparatorString - This string, if specified, is used to separate - /// instructions from each other when on the same line. - const char *SeparatorString; // Defaults to ';' - - /// CommentString - This indicates the comment character used by the - /// assembler. - const char *CommentString; // Defaults to "#" - - /// LabelSuffix - This is appended to emitted labels. - const char *LabelSuffix; // Defaults to ":" - - /// LabelSuffix - This is appended to emitted labels. - const char *DebugLabelSuffix; // Defaults to ":" - - /// This prefix is used for globals like constant pool entries that are - /// completely private to the .s file and should not have names in the .o - /// file. - const char *PrivateGlobalPrefix; // Defaults to "L" - - /// This prefix is used for symbols that should be passed through the - /// assembler but be removed by the linker. This is 'l' on Darwin, - /// currently used for some ObjC metadata. - /// The default of "" meast that for this system a plain private symbol - /// should be used. - const char *LinkerPrivateGlobalPrefix; // Defaults to "". - - /// InlineAsmStart/End - If these are nonempty, they contain a directive to - /// emit before and after an inline assembly statement. - const char *InlineAsmStart; // Defaults to "#APP\n" - const char *InlineAsmEnd; // Defaults to "#NO_APP\n" - - /// Code16Directive, Code32Directive, Code64Directive - These are assembly - /// directives that tells the assembler to interpret the following - /// instructions differently. - const char *Code16Directive; // Defaults to ".code16" - const char *Code32Directive; // Defaults to ".code32" - const char *Code64Directive; // Defaults to ".code64" - - /// AssemblerDialect - Which dialect of an assembler variant to use. - unsigned AssemblerDialect; // Defaults to 0 - - /// \brief This is true if the assembler allows @ characters in symbol - /// names. Defaults to false. - bool AllowAtInName; - - /// UseDataRegionDirectives - This is true if data region markers should - /// be printed as ".data_region/.end_data_region" directives. If false, - /// use "$d/$a" labels instead. - bool UseDataRegionDirectives; - - //===--- Data Emission Directives -------------------------------------===// - - /// ZeroDirective - this should be set to the directive used to get some - /// number of zero bytes emitted to the current section. Common cases are - /// "\t.zero\t" and "\t.space\t". If this is set to null, the - /// Data*bitsDirective's will be used to emit zero bytes. - const char *ZeroDirective; // Defaults to "\t.zero\t" - - /// AsciiDirective - This directive allows emission of an ascii string with - /// the standard C escape characters embedded into it. - const char *AsciiDirective; // Defaults to "\t.ascii\t" - - /// AscizDirective - If not null, this allows for special handling of - /// zero terminated strings on this target. This is commonly supported as - /// ".asciz". If a target doesn't support this, it can be set to null. - const char *AscizDirective; // Defaults to "\t.asciz\t" - - /// DataDirectives - These directives are used to output some unit of - /// integer data to the current section. If a data directive is set to - /// null, smaller data directives will be used to emit the large sizes. - const char *Data8bitsDirective; // Defaults to "\t.byte\t" - const char *Data16bitsDirective; // Defaults to "\t.short\t" - const char *Data32bitsDirective; // Defaults to "\t.long\t" - const char *Data64bitsDirective; // Defaults to "\t.quad\t" - - /// GPRel64Directive - if non-null, a directive that is used to emit a word - /// which should be relocated as a 64-bit GP-relative offset, e.g. .gpdword - /// on Mips. - const char *GPRel64Directive; // Defaults to NULL. - - /// GPRel32Directive - if non-null, a directive that is used to emit a word - /// which should be relocated as a 32-bit GP-relative offset, e.g. .gpword - /// on Mips or .gprel32 on Alpha. - const char *GPRel32Directive; // Defaults to NULL. - - /// SunStyleELFSectionSwitchSyntax - This is true if this target uses "Sun - /// Style" syntax for section switching ("#alloc,#write" etc) instead of the - /// normal ELF syntax (,"a,w") in .section directives. - bool SunStyleELFSectionSwitchSyntax; // Defaults to false. - - /// UsesELFSectionDirectiveForBSS - This is true if this target uses ELF - /// '.section' directive before the '.bss' one. It's used for PPC/Linux - /// which doesn't support the '.bss' directive only. - bool UsesELFSectionDirectiveForBSS; // Defaults to false. - - bool NeedsDwarfSectionOffsetDirective; - - //===--- Alignment Information ----------------------------------------===// - - /// AlignmentIsInBytes - If this is true (the default) then the asmprinter - /// emits ".align N" directives, where N is the number of bytes to align to. - /// Otherwise, it emits ".align log2(N)", e.g. 3 to align to an 8 byte - /// boundary. - bool AlignmentIsInBytes; // Defaults to true - - /// TextAlignFillValue - If non-zero, this is used to fill the executable - /// space created as the result of a alignment directive. - unsigned TextAlignFillValue; // Defaults to 0 + virtual const MCExpr *getExprForPersonalitySymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const; + + virtual const MCExpr *getExprForFDESymbol(const MCSymbol *Sym, + unsigned Encoding, + MCStreamer &Streamer) const; + + bool usesSunStyleELFSectionSwitchSyntax() const { + return SunStyleELFSectionSwitchSyntax; + } - //===--- Global Variable Emission Directives --------------------------===// + bool usesELFSectionDirectiveForBSS() const { + return UsesELFSectionDirectiveForBSS; + } + + bool needsDwarfSectionOffsetDirective() const { + return NeedsDwarfSectionOffsetDirective; + } + + // Accessors. + + bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; } + bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; } + bool hasStaticCtorDtorReferenceInStaticMode() const { + return HasStaticCtorDtorReferenceInStaticMode; + } + bool getLinkerRequiresNonEmptyDwarfLines() const { + return LinkerRequiresNonEmptyDwarfLines; + } + unsigned getMaxInstLength() const { return MaxInstLength; } + unsigned getMinInstAlignment() const { return MinInstAlignment; } + bool getDollarIsPC() const { return DollarIsPC; } + const char *getSeparatorString() const { return SeparatorString; } + + /// This indicates the column (zero-based) at which asm comments should be + /// printed. + unsigned getCommentColumn() const { return 40; } + + const char *getCommentString() const { return CommentString; } + const char *getLabelSuffix() const { return LabelSuffix; } + + bool useAssignmentForEHBegin() const { return UseAssignmentForEHBegin; } + const char *getPrivateGlobalPrefix() const { return PrivateGlobalPrefix; } + bool hasLinkerPrivateGlobalPrefix() const { + return LinkerPrivateGlobalPrefix[0] != '\0'; + } + const char *getLinkerPrivateGlobalPrefix() const { + if (hasLinkerPrivateGlobalPrefix()) + return LinkerPrivateGlobalPrefix; + return getPrivateGlobalPrefix(); + } + const char *getInlineAsmStart() const { return InlineAsmStart; } + const char *getInlineAsmEnd() const { return InlineAsmEnd; } + const char *getCode16Directive() const { return Code16Directive; } + const char *getCode32Directive() const { return Code32Directive; } + const char *getCode64Directive() const { return Code64Directive; } + unsigned getAssemblerDialect() const { return AssemblerDialect; } + bool doesAllowAtInName() const { return AllowAtInName; } + bool doesSupportDataRegionDirectives() const { + return UseDataRegionDirectives; + } + const char *getZeroDirective() const { return ZeroDirective; } + const char *getAsciiDirective() const { return AsciiDirective; } + const char *getAscizDirective() const { return AscizDirective; } + bool getAlignmentIsInBytes() const { return AlignmentIsInBytes; } + unsigned getTextAlignFillValue() const { return TextAlignFillValue; } + const char *getGlobalDirective() const { return GlobalDirective; } + bool hasSetDirective() const { return HasSetDirective; } + bool hasAggressiveSymbolFolding() const { return HasAggressiveSymbolFolding; } + bool getCOMMDirectiveAlignmentIsInBytes() const { + return COMMDirectiveAlignmentIsInBytes; + } + LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const { + return LCOMMDirectiveAlignmentType; + } + bool hasDotTypeDotSizeDirective() const { return HasDotTypeDotSizeDirective; } + bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; } + bool hasIdentDirective() const { return HasIdentDirective; } + bool hasNoDeadStrip() const { return HasNoDeadStrip; } + const char *getWeakRefDirective() const { return WeakRefDirective; } + bool hasWeakDefDirective() const { return HasWeakDefDirective; } + bool hasWeakDefCanBeHiddenDirective() const { + return HasWeakDefCanBeHiddenDirective; + } + bool hasLinkOnceDirective() const { return HasLinkOnceDirective; } - /// GlobalDirective - This is the directive used to declare a global entity. - /// - const char *GlobalDirective; // Defaults to NULL. - - /// HasSetDirective - True if the assembler supports the .set directive. - bool HasSetDirective; // Defaults to true. - - /// HasAggressiveSymbolFolding - False if the assembler requires that we use - /// Lc = a - b - /// .long Lc - /// instead of - /// .long a - b - bool HasAggressiveSymbolFolding; // Defaults to true. + MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr; } + MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { + return HiddenDeclarationVisibilityAttr; + } + MCSymbolAttr getProtectedVisibilityAttr() const { + return ProtectedVisibilityAttr; + } + bool hasLEB128() const { return HasLEB128; } + bool doesSupportDebugInformation() const { return SupportsDebugInformation; } + bool doesSupportExceptionHandling() const { + return ExceptionsType != ExceptionHandling::None; + } + ExceptionHandling getExceptionHandlingType() const { return ExceptionsType; } + WinEH::EncodingType getWinEHEncodingType() const { return WinEHEncodingType; } + bool isExceptionHandlingDwarf() const { + return (ExceptionsType == ExceptionHandling::DwarfCFI || + ExceptionsType == ExceptionHandling::ARM || + // Windows handler data still uses DWARF LSDA encoding. + ExceptionsType == ExceptionHandling::WinEH); + } + bool doesDwarfUseRelocationsAcrossSections() const { + return DwarfUsesRelocationsAcrossSections; + } + bool doDwarfFDESymbolsUseAbsDiff() const { return DwarfFDESymbolsUseAbsDiff; } + bool useDwarfRegNumForCFI() const { return DwarfRegNumForCFI; } + bool useParensForSymbolVariant() const { return UseParensForSymbolVariant; } - /// COMMDirectiveAlignmentIsInBytes - True is .comm's and .lcomms optional - /// alignment is to be specified in bytes instead of log2(n). - bool COMMDirectiveAlignmentIsInBytes; // Defaults to true; + void addInitialFrameState(const MCCFIInstruction &Inst) { + InitialFrameState.push_back(Inst); + } - /// LCOMMDirectiveAlignment - Describes if the .lcomm directive for the - /// target supports an alignment argument and how it is interpreted. - LCOMM::LCOMMType LCOMMDirectiveAlignmentType; // Defaults to NoAlignment. - - /// HasDotTypeDotSizeDirective - True if the target has .type and .size - /// directives, this is true for most ELF targets. - bool HasDotTypeDotSizeDirective; // Defaults to true. + const std::vector<MCCFIInstruction> &getInitialFrameState() const { + return InitialFrameState; + } - /// HasSingleParameterDotFile - True if the target has a single parameter - /// .file directive, this is true for ELF targets. - bool HasSingleParameterDotFile; // Defaults to true. + /// Return true if assembly (inline or otherwise) should be parsed. + bool useIntegratedAssembler() const { return UseIntegratedAssembler; } - /// hasIdentDirective - True if the target has a .ident directive, this is - /// true for ELF targets. - bool HasIdentDirective; // Defaults to false. + /// Set whether assembly (inline or otherwise) should be parsed. + virtual void setUseIntegratedAssembler(bool Value) { + UseIntegratedAssembler = Value; + } - /// HasNoDeadStrip - True if this target supports the MachO .no_dead_strip - /// directive. - bool HasNoDeadStrip; // Defaults to false. + bool compressDebugSections() const { return CompressDebugSections; } - /// WeakRefDirective - This directive, if non-null, is used to declare a - /// global as being a weak undefined symbol. - const char *WeakRefDirective; // Defaults to NULL. - - /// True if we have a directive to declare a global as being a weak - /// defined symbol. - bool HasWeakDefDirective; // Defaults to false. - - /// True if we have a directive to declare a global as being a weak - /// defined symbol that can be hidden (unexported). - bool HasWeakDefCanBeHiddenDirective; // Defaults to false. - - /// True if we have a .linkonce directive. This is used on cygwin/mingw. - bool HasLinkOnceDirective; // Defaults to false. - - /// HiddenVisibilityAttr - This attribute, if not MCSA_Invalid, is used to - /// declare a symbol as having hidden visibility. - MCSymbolAttr HiddenVisibilityAttr; // Defaults to MCSA_Hidden. - - /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid, - /// is used to declare an undefined symbol as having hidden visibility. - MCSymbolAttr HiddenDeclarationVisibilityAttr; // Defaults to MCSA_Hidden. - - - /// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used - /// to declare a symbol as having protected visibility. - MCSymbolAttr ProtectedVisibilityAttr; // Defaults to MCSA_Protected - - //===--- Dwarf Emission Directives -----------------------------------===// - - /// HasLEB128 - True if target asm supports leb128 directives. - bool HasLEB128; // Defaults to false. - - /// SupportsDebugInformation - True if target supports emission of debugging - /// information. - bool SupportsDebugInformation; // Defaults to false. - - /// SupportsExceptionHandling - True if target supports exception handling. - ExceptionHandling::ExceptionsType ExceptionsType; // Defaults to None - - /// DwarfUsesRelocationsAcrossSections - True if Dwarf2 output generally - /// uses relocations for references to other .debug_* sections. - bool DwarfUsesRelocationsAcrossSections; - - /// DwarfFDESymbolsUseAbsDiff - true if DWARF FDE symbol reference - /// relocations should be replaced by an absolute difference. - bool DwarfFDESymbolsUseAbsDiff; - - /// DwarfRegNumForCFI - True if dwarf register numbers are printed - /// instead of symbolic register names in .cfi_* directives. - bool DwarfRegNumForCFI; // Defaults to false; - - /// UseParensForSymbolVariant - True if target uses parens to indicate the - /// symbol variant instead of @. For example, foo(plt) instead of foo@plt. - bool UseParensForSymbolVariant; // Defaults to false; - - //===--- Prologue State ----------------------------------------------===// - - std::vector<MCCFIInstruction> InitialFrameState; - - //===--- Integrated Assembler State ----------------------------------===// - /// Should we use the integrated assembler? - /// The integrated assembler should be enabled by default (by the - /// constructors) when failing to parse a valid piece of assembly (inline - /// or otherwise) is considered a bug. It may then be overridden after - /// construction (see LLVMTargetMachine::initAsmInfo()). - bool UseIntegratedAssembler; - - /// Compress DWARF debug sections. Defaults to false. - bool CompressDebugSections; - - public: - explicit MCAsmInfo(); - virtual ~MCAsmInfo(); - - /// getPointerSize - Get the pointer size in bytes. - unsigned getPointerSize() const { - return PointerSize; - } - - /// getCalleeSaveStackSlotSize - Get the callee-saved register stack slot - /// size in bytes. - unsigned getCalleeSaveStackSlotSize() const { - return CalleeSaveStackSlotSize; - } - - /// isLittleEndian - True if the target is little endian. - bool isLittleEndian() const { - return IsLittleEndian; - } - - /// isStackGrowthDirectionUp - True if target stack grow up. - bool isStackGrowthDirectionUp() const { - return StackGrowsUp; - } - - bool hasSubsectionsViaSymbols() const { return HasSubsectionsViaSymbols; } - - // Data directive accessors. - // - const char *getData8bitsDirective() const { - return Data8bitsDirective; - } - const char *getData16bitsDirective() const { - return Data16bitsDirective; - } - const char *getData32bitsDirective() const { - return Data32bitsDirective; - } - const char *getData64bitsDirective() const { - return Data64bitsDirective; - } - const char *getGPRel64Directive() const { return GPRel64Directive; } - const char *getGPRel32Directive() const { return GPRel32Directive; } - - /// getNonexecutableStackSection - Targets can implement this method to - /// specify a section to switch to if the translation unit doesn't have any - /// trampolines that require an executable stack. - virtual const MCSection *getNonexecutableStackSection(MCContext &Ctx) const{ - return nullptr; - } - - virtual const MCExpr * - getExprForPersonalitySymbol(const MCSymbol *Sym, - unsigned Encoding, - MCStreamer &Streamer) const; - - virtual const MCExpr * - getExprForFDESymbol(const MCSymbol *Sym, - unsigned Encoding, - MCStreamer &Streamer) const; - - bool usesSunStyleELFSectionSwitchSyntax() const { - return SunStyleELFSectionSwitchSyntax; - } - - bool usesELFSectionDirectiveForBSS() const { - return UsesELFSectionDirectiveForBSS; - } - - bool needsDwarfSectionOffsetDirective() const { - return NeedsDwarfSectionOffsetDirective; - } - - // Accessors. - // - bool hasMachoZeroFillDirective() const { return HasMachoZeroFillDirective; } - bool hasMachoTBSSDirective() const { return HasMachoTBSSDirective; } - bool hasStaticCtorDtorReferenceInStaticMode() const { - return HasStaticCtorDtorReferenceInStaticMode; - } - bool getLinkerRequiresNonEmptyDwarfLines() const { - return LinkerRequiresNonEmptyDwarfLines; - } - unsigned getMaxInstLength() const { - return MaxInstLength; - } - unsigned getMinInstAlignment() const { - return MinInstAlignment; - } - bool getDollarIsPC() const { - return DollarIsPC; - } - const char *getSeparatorString() const { - return SeparatorString; - } - - /// This indicates the column (zero-based) at which asm comments should be - /// printed. - unsigned getCommentColumn() const { - return 40; - } - - const char *getCommentString() const { - return CommentString; - } - const char *getLabelSuffix() const { - return LabelSuffix; - } - - const char *getDebugLabelSuffix() const { - return DebugLabelSuffix; - } - const char *getPrivateGlobalPrefix() const { - return PrivateGlobalPrefix; - } - bool hasLinkerPrivateGlobalPrefix() const { - return LinkerPrivateGlobalPrefix[0] != '\0'; - } - const char *getLinkerPrivateGlobalPrefix() const { - if (hasLinkerPrivateGlobalPrefix()) - return LinkerPrivateGlobalPrefix; - return getPrivateGlobalPrefix(); - } - const char *getInlineAsmStart() const { - return InlineAsmStart; - } - const char *getInlineAsmEnd() const { - return InlineAsmEnd; - } - const char *getCode16Directive() const { - return Code16Directive; - } - const char *getCode32Directive() const { - return Code32Directive; - } - const char *getCode64Directive() const { - return Code64Directive; - } - unsigned getAssemblerDialect() const { - return AssemblerDialect; - } - bool doesAllowAtInName() const { - return AllowAtInName; - } - bool doesSupportDataRegionDirectives() const { - return UseDataRegionDirectives; - } - const char *getZeroDirective() const { - return ZeroDirective; - } - const char *getAsciiDirective() const { - return AsciiDirective; - } - const char *getAscizDirective() const { - return AscizDirective; - } - bool getAlignmentIsInBytes() const { - return AlignmentIsInBytes; - } - unsigned getTextAlignFillValue() const { - return TextAlignFillValue; - } - const char *getGlobalDirective() const { - return GlobalDirective; - } - bool hasSetDirective() const { return HasSetDirective; } - bool hasAggressiveSymbolFolding() const { - return HasAggressiveSymbolFolding; - } - bool getCOMMDirectiveAlignmentIsInBytes() const { - return COMMDirectiveAlignmentIsInBytes; - } - LCOMM::LCOMMType getLCOMMDirectiveAlignmentType() const { - return LCOMMDirectiveAlignmentType; - } - bool hasDotTypeDotSizeDirective() const {return HasDotTypeDotSizeDirective;} - bool hasSingleParameterDotFile() const { return HasSingleParameterDotFile; } - bool hasIdentDirective() const { return HasIdentDirective; } - bool hasNoDeadStrip() const { return HasNoDeadStrip; } - const char *getWeakRefDirective() const { return WeakRefDirective; } - bool hasWeakDefDirective() const { return HasWeakDefDirective; } - bool hasWeakDefCanBeHiddenDirective() const { - return HasWeakDefCanBeHiddenDirective; - } - bool hasLinkOnceDirective() const { return HasLinkOnceDirective; } - - MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;} - MCSymbolAttr getHiddenDeclarationVisibilityAttr() const { - return HiddenDeclarationVisibilityAttr; - } - MCSymbolAttr getProtectedVisibilityAttr() const { - return ProtectedVisibilityAttr; - } - bool hasLEB128() const { - return HasLEB128; - } - bool doesSupportDebugInformation() const { - return SupportsDebugInformation; - } - bool doesSupportExceptionHandling() const { - return ExceptionsType != ExceptionHandling::None; - } - ExceptionHandling::ExceptionsType getExceptionHandlingType() const { - return ExceptionsType; - } - bool isExceptionHandlingDwarf() const { - return - (ExceptionsType == ExceptionHandling::DwarfCFI || - ExceptionsType == ExceptionHandling::ARM || - ExceptionsType == ExceptionHandling::Win64); - } - bool doesDwarfUseRelocationsAcrossSections() const { - return DwarfUsesRelocationsAcrossSections; - } - bool doDwarfFDESymbolsUseAbsDiff() const { - return DwarfFDESymbolsUseAbsDiff; - } - bool useDwarfRegNumForCFI() const { - return DwarfRegNumForCFI; - } - bool useParensForSymbolVariant() const { - return UseParensForSymbolVariant; - } - - void addInitialFrameState(const MCCFIInstruction &Inst) { - InitialFrameState.push_back(Inst); - } - - const std::vector<MCCFIInstruction> &getInitialFrameState() const { - return InitialFrameState; - } - - /// Return true if assembly (inline or otherwise) should be parsed. - bool useIntegratedAssembler() const { return UseIntegratedAssembler; } - - /// Set whether assembly (inline or otherwise) should be parsed. - virtual void setUseIntegratedAssembler(bool Value) { - UseIntegratedAssembler = Value; - } - - bool compressDebugSections() const { return CompressDebugSections; } - - void setCompressDebugSections(bool CompressDebugSections) { - this->CompressDebugSections = CompressDebugSections; - } - }; + void setCompressDebugSections(bool CompressDebugSections) { + this->CompressDebugSections = CompressDebugSections; + } +}; } #endif |