1 //===-- X86MCAsmInfo.cpp - X86 asm properties -----------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declarations of the X86MCAsmInfo properties.
12 //===----------------------------------------------------------------------===//
14 #include "X86MCAsmInfo.h"
15 #include "X86TargetMachine.h"
16 #include "llvm/ADT/Triple.h"
17 #include "llvm/MC/MCSectionELF.h"
18 #include "llvm/Support/CommandLine.h"
21 enum AsmWriterFlavorTy {
22 // Note: This numbering has to match the GCC assembler dialects for inline
23 // asm alternatives to work right.
27 static cl::opt<AsmWriterFlavorTy>
28 AsmWriterFlavor("x86-asm-syntax", cl::init(ATT),
29 cl::desc("Choose style of code to emit from X86 backend:"),
30 cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
31 clEnumValN(Intel, "intel", "Emit Intel-style assembly"),
35 static const char *const x86_asm_table[] = {
47 X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &Triple) {
48 AsmTransCBE = x86_asm_table;
49 AssemblerDialect = AsmWriterFlavor;
51 bool is64Bit = Triple.getArch() == Triple::x86_64;
53 TextAlignFillValue = 0x90;
56 Data64bitsDirective = 0; // we can't emit a 64-bit unit
61 SupportsDebugInformation = true;
62 DwarfUsesInlineInfoSection = true;
64 // Exceptions handling
65 ExceptionsType = ExceptionHandling::Dwarf;
66 AbsoluteEHSectionOffsets = false;
69 X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &Triple) {
70 AsmTransCBE = x86_asm_table;
71 AssemblerDialect = AsmWriterFlavor;
73 PrivateGlobalPrefix = ".L";
74 WeakRefDirective = "\t.weak\t";
77 // Set up DWARF directives
78 HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
81 AbsoluteDebugSectionOffsets = true;
82 SupportsDebugInformation = true;
84 // Exceptions handling
85 ExceptionsType = ExceptionHandling::Dwarf;
86 AbsoluteEHSectionOffsets = false;
89 MCSection *X86ELFMCAsmInfo::getNonexecutableStackSection(MCContext &Ctx) const {
90 return MCSectionELF::Create(".note.GNU-stack", MCSectionELF::SHT_PROGBITS,
91 0, SectionKind::getMetadata(), false, Ctx);
94 X86MCAsmInfoCOFF::X86MCAsmInfoCOFF(const Triple &Triple) {
95 AsmTransCBE = x86_asm_table;
96 AssemblerDialect = AsmWriterFlavor;
100 X86WinMCAsmInfo::X86WinMCAsmInfo(const Triple &Triple) {
101 AsmTransCBE = x86_asm_table;
102 AssemblerDialect = AsmWriterFlavor;
107 PrivateGlobalPrefix = "$";
108 AlignDirective = "\tALIGN\t";
109 ZeroDirective = "\tdb\t";
110 AsciiDirective = "\tdb\t";
112 Data8bitsDirective = "\tdb\t";
113 Data16bitsDirective = "\tdw\t";
114 Data32bitsDirective = "\tdd\t";
115 Data64bitsDirective = "\tdq\t";
116 HasDotTypeDotSizeDirective = false;
117 HasSingleParameterDotFile = false;
119 AlignmentIsInBytes = true;