lib/Target/X86/X86TargetAsmInfo.cpp

   1 //===-- X86TargetAsmInfo.cpp - X86 asm properties ---------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file contains the declarations of the X86TargetAsmInfo properties.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "X86TargetAsmInfo.h"
  15 #include "X86TargetMachine.h"
  16 #include "X86Subtarget.h"
  17 #include "llvm/DerivedTypes.h"
  18 #include "llvm/InlineAsm.h"
  19 #include "llvm/Instructions.h"
  20 #include "llvm/Intrinsics.h"
  21 #include "llvm/Module.h"
  22 #include "llvm/ADT/StringExtras.h"
  23 #include "llvm/Support/Dwarf.h"
  24 #include "llvm/Support/ErrorHandling.h"
  25
  26 using namespace llvm;
  27 using namespace llvm::dwarf;
  28
  29 const char *const llvm::x86_asm_table[] = {
  30   "{si}", "S",
  31   "{di}", "D",
  32   "{ax}", "a",
  33   "{cx}", "c",
  34   "{memory}", "memory",
  35   "{flags}", "",
  36   "{dirflag}", "",
  37   "{fpsr}", "",
  38   "{cc}", "cc",
  39   0,0};
  40
  41 X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
  42   X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
  43   const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
  44   bool is64Bit = Subtarget->is64Bit();
  45
  46   AlignmentIsInBytes = false;
  47   TextAlignFillValue = 0x90;
  48
  49
  50   if (!is64Bit)
  51     Data64bitsDirective = 0;       // we can't emit a 64-bit unit
  52   ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
  53   ZeroFillDirective = "\t.zerofill\t";  // Uses .zerofill
  54   LCOMMDirective = "\t.lcomm\t";
  55
  56   // Leopard and above support aligned common symbols.
  57   COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
  58   HasDotTypeDotSizeDirective = false;
  59
  60   if (is64Bit) {
  61     PersonalityPrefix = "";
  62     PersonalitySuffix = "+4@GOTPCREL";
  63   } else {
  64     PersonalityPrefix = "L";
  65     PersonalitySuffix = "$non_lazy_ptr";
  66   }
  67
  68   InlineAsmStart = "## InlineAsm Start";
  69   InlineAsmEnd = "## InlineAsm End";
  70   CommentString = "##";
  71   SetDirective = "\t.set";
  72   PCSymbol = ".";
  73   UsedDirective = "\t.no_dead_strip\t";
  74   ProtectedDirective = "\t.globl\t";
  75
  76   SupportsDebugInformation = true;
  77   DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
  78   DwarfUsesInlineInfoSection = true;
  79
  80   // Exceptions handling
  81   SupportsExceptionHandling = true;
  82   GlobalEHDirective = "\t.globl\t";
  83   SupportsWeakOmittedEHFrame = false;
  84   AbsoluteEHSectionOffsets = false;
  85   DwarfEHFrameSection =
  86   ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
  87 }
  88
  89 X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM) :
  90   X86TargetAsmInfo<ELFTargetAsmInfo>(TM) {
  91
  92   PrivateGlobalPrefix = ".L";
  93   WeakRefDirective = "\t.weak\t";
  94   SetDirective = "\t.set\t";
  95   PCSymbol = ".";
  96
  97   // Set up DWARF directives
  98   HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
  99
 100   // Debug Information
 101   AbsoluteDebugSectionOffsets = true;
 102   SupportsDebugInformation = true;
 103   DwarfAbbrevSection =  "\t.section\t.debug_abbrev,\"\",@progbits";
 104   DwarfInfoSection =    "\t.section\t.debug_info,\"\",@progbits";
 105   DwarfLineSection =    "\t.section\t.debug_line,\"\",@progbits";
 106   DwarfFrameSection =   "\t.section\t.debug_frame,\"\",@progbits";
 107   DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
 108   DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
 109   DwarfStrSection =     "\t.section\t.debug_str,\"\",@progbits";
 110   DwarfLocSection =     "\t.section\t.debug_loc,\"\",@progbits";
 111   DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
 112   DwarfRangesSection =  "\t.section\t.debug_ranges,\"\",@progbits";
 113   DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
 114
 115   // Exceptions handling
 116   SupportsExceptionHandling = true;
 117   AbsoluteEHSectionOffsets = false;
 118   DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
 119
 120   // On Linux we must declare when we can use a non-executable stack.
 121   if (TM.getSubtarget<X86Subtarget>().isLinux())
 122     NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
 123 }
 124
 125
 126 X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
 127   X86TargetAsmInfo<TargetAsmInfo>(TM) {
 128   GlobalPrefix = "_";
 129   CommentString = ";";
 130
 131   InlineAsmStart = "; InlineAsm Start";
 132   InlineAsmEnd   = "; InlineAsm End";
 133
 134   PrivateGlobalPrefix = "$";
 135   AlignDirective = "\tALIGN\t";
 136   ZeroDirective = "\tdb\t";
 137   ZeroDirectiveSuffix = " dup(0)";
 138   AsciiDirective = "\tdb\t";
 139   AscizDirective = 0;
 140   Data8bitsDirective = "\tdb\t";
 141   Data16bitsDirective = "\tdw\t";
 142   Data32bitsDirective = "\tdd\t";
 143   Data64bitsDirective = "\tdq\t";
 144   HasDotTypeDotSizeDirective = false;
 145   HasSingleParameterDotFile = false;
 146
 147   AlignmentIsInBytes = true;
 148
 149   SwitchToSectionDirective = "";
 150   TextSectionStartSuffix = "\tSEGMENT PARA 'CODE'";
 151   DataSectionStartSuffix = "\tSEGMENT PARA 'DATA'";
 152   SectionEndDirectiveSuffix = "\tends\n";
 153 }
 154
 155 // Instantiate default implementation.
 156 TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);