#include "X86MCAsmInfo.h"
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ELF.h"
using namespace llvm;
enum AsmWriterFlavorTy {
ATT = 0, Intel = 1
};
static cl::opt<AsmWriterFlavorTy>
AsmWriterFlavor("x86-asm-syntax", cl::init(ATT),
cl::desc("Choose style of code to emit from X86 backend:"),
cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
clEnumValN(Intel, "intel", "Emit Intel-style assembly"),
clEnumValEnd));
static cl::opt<bool>
MarkedJTDataRegions("mark-data-regions", cl::init(false),
cl::desc("Mark code section jump table data regions."),
cl::Hidden);
void X86MCAsmInfoDarwin::anchor() { }
X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) {
bool is64Bit = T.getArch() == Triple::x86_64;
if (is64Bit)
PointerSize = CalleeSaveStackSlotSize = 8;
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
if (!is64Bit)
Data64bitsDirective = 0;
CommentString = "##";
SupportsDebugInformation = true;
UseDataRegionDirectives = MarkedJTDataRegions;
ExceptionsType = ExceptionHandling::DwarfCFI;
if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
HasWeakDefCanBeHiddenDirective = false;
DwarfFDESymbolsUseAbsDiff = T.isMacOSX() && !T.isMacOSXVersionLT(10, 6);
}
X86_64MCAsmInfoDarwin::X86_64MCAsmInfoDarwin(const Triple &Triple)
: X86MCAsmInfoDarwin(Triple) {
}
void X86ELFMCAsmInfo::anchor() { }
X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
bool is64Bit = T.getArch() == Triple::x86_64;
bool isX32 = T.getEnvironment() == Triple::GNUX32;
PointerSize = (is64Bit && !isX32) ? 8 : 4;
CalleeSaveStackSlotSize = is64Bit ? 8 : 4;
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
HasLEB128 = true;
SupportsDebugInformation = true;
ExceptionsType = ExceptionHandling::DwarfCFI;
if ((T.getOS() == Triple::OpenBSD || T.getOS() == Triple::Bitrig) &&
T.getArch() == Triple::x86)
Data64bitsDirective = 0;
}
const MCExpr *
X86_64MCAsmInfoDarwin::getExprForPersonalitySymbol(const MCSymbol *Sym,
unsigned Encoding,
MCStreamer &Streamer) const {
MCContext &Context = Streamer.getContext();
const MCExpr *Res =
MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_GOTPCREL, Context);
const MCExpr *Four = MCConstantExpr::Create(4, Context);
return MCBinaryExpr::CreateAdd(Res, Four, Context);
}
const MCSection *X86ELFMCAsmInfo::
getNonexecutableStackSection(MCContext &Ctx) const {
return Ctx.getELFSection(".note.GNU-stack", ELF::SHT_PROGBITS,
0, SectionKind::getMetadata());
}
void X86MCAsmInfoMicrosoft::anchor() { }
X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
if (Triple.getArch() == Triple::x86_64)
PrivateGlobalPrefix = ".L";
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
AllowAtInName = true;
}
void X86MCAsmInfoGNUCOFF::anchor() { }
X86MCAsmInfoGNUCOFF::X86MCAsmInfoGNUCOFF(const Triple &Triple) {
if (Triple.getArch() == Triple::x86_64)
PrivateGlobalPrefix = ".L";
AssemblerDialect = AsmWriterFlavor;
TextAlignFillValue = 0x90;
ExceptionsType = ExceptionHandling::DwarfCFI;
}