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//===-- 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;
HasLEB128 = false;
SupportsDebugInformation = false;
ExceptionsType = ExceptionHandling::None;
WinEHEncodingType = WinEH::EncodingType::ET_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);
}
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