//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file defines target asm properties related what form asm statements // should take. // //===----------------------------------------------------------------------===// #include "llvm/MC/MCAsmInfo.h" #include "llvm/MC/MCContext.h" #include "llvm/MC/MCExpr.h" #include "llvm/MC/MCStreamer.h" #include "llvm/Support/DataTypes.h" #include "llvm/Support/Dwarf.h" #include <cctype> #include <cstring> using namespace llvm; MCAsmInfo::MCAsmInfo() { PointerSize = 4; CalleeSaveStackSlotSize = 4; IsLittleEndian = true; StackGrowsUp = false; HasSubsectionsViaSymbols = false; HasMachoZeroFillDirective = false; HasMachoTBSSDirective = false; HasStaticCtorDtorReferenceInStaticMode = false; LinkerRequiresNonEmptyDwarfLines = false; MaxInstLength = 4; MinInstAlignment = 1; DollarIsPC = false; SeparatorString = ";"; CommentString = "#"; LabelSuffix = ":"; UseAssignmentForEHBegin = false; PrivateGlobalPrefix = "L"; LinkerPrivateGlobalPrefix = ""; InlineAsmStart = "APP"; InlineAsmEnd = "NO_APP"; Code16Directive = ".code16"; Code32Directive = ".code32"; Code64Directive = ".code64"; AssemblerDialect = 0; AllowAtInName = false; UseDataRegionDirectives = false; ZeroDirective = "\t.zero\t"; AsciiDirective = "\t.ascii\t"; AscizDirective = "\t.asciz\t"; Data8bitsDirective = "\t.byte\t"; Data16bitsDirective = "\t.short\t"; Data32bitsDirective = "\t.long\t"; Data64bitsDirective = "\t.quad\t"; SunStyleELFSectionSwitchSyntax = false; UsesELFSectionDirectiveForBSS = false; AlignmentIsInBytes = true; TextAlignFillValue = 0; GPRel64Directive = nullptr; GPRel32Directive = nullptr; GlobalDirective = "\t.globl\t"; HasSetDirective = true; HasAggressiveSymbolFolding = true; COMMDirectiveAlignmentIsInBytes = true; LCOMMDirectiveAlignmentType = LCOMM::NoAlignment; HasDotTypeDotSizeDirective = true; HasSingleParameterDotFile = true; HasIdentDirective = false; HasNoDeadStrip = false; WeakRefDirective = nullptr; HasWeakDefDirective = false; HasWeakDefCanBeHiddenDirective = false; HasLinkOnceDirective = false; HiddenVisibilityAttr = MCSA_Hidden; HiddenDeclarationVisibilityAttr = MCSA_Hidden; ProtectedVisibilityAttr = MCSA_Protected; SupportsDebugInformation = false; ExceptionsType = ExceptionHandling::None; WinEHEncodingType = WinEH::EncodingType::Invalid; DwarfUsesRelocationsAcrossSections = true; DwarfFDESymbolsUseAbsDiff = false; DwarfRegNumForCFI = false; NeedsDwarfSectionOffsetDirective = false; UseParensForSymbolVariant = false; // FIXME: Clang's logic should be synced with the logic used to initialize // this member and the two implementations should be merged. // For reference: // - Solaris always enables the integrated assembler by default // - SparcELFMCAsmInfo and X86ELFMCAsmInfo are handling this case // - Windows always enables the integrated assembler by default // - MCAsmInfoCOFF is handling this case, should it be MCAsmInfoMicrosoft? // - MachO targets always enables the integrated assembler by default // - MCAsmInfoDarwin is handling this case // - Generic_GCC toolchains enable the integrated assembler on a per // architecture basis. // - The target subclasses for AArch64, ARM, and X86 handle these cases UseIntegratedAssembler = false; CompressDebugSections = false; } MCAsmInfo::~MCAsmInfo() { } const MCExpr * MCAsmInfo::getExprForPersonalitySymbol(const MCSymbol *Sym, unsigned Encoding, MCStreamer &Streamer) const { return getExprForFDESymbol(Sym, Encoding, Streamer); } const MCExpr * MCAsmInfo::getExprForFDESymbol(const MCSymbol *Sym, unsigned Encoding, MCStreamer &Streamer) const { if (!(Encoding & dwarf::DW_EH_PE_pcrel)) return MCSymbolRefExpr::Create(Sym, Streamer.getContext()); MCContext &Context = Streamer.getContext(); const MCExpr *Res = MCSymbolRefExpr::Create(Sym, Context); MCSymbol *PCSym = Context.CreateTempSymbol(); Streamer.EmitLabel(PCSym); const MCExpr *PC = MCSymbolRefExpr::Create(PCSym, Context); return MCBinaryExpr::CreateSub(Res, PC, Context); }