lib/Target/PowerPC/PPCTargetAsmInfo.cpp

   1 //===-- PPCTargetAsmInfo.cpp - PPC 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 DarwinTargetAsmInfo properties.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "PPCTargetAsmInfo.h"
  15 #include "PPCTargetMachine.h"
  16 #include "llvm/Function.h"
  17 using namespace llvm;
  18
  19 PPCTargetAsmInfo::PPCTargetAsmInfo(const PPCTargetMachine &TM) {
  20   bool isPPC64 = TM.getSubtargetImpl()->isPPC64();
  21
  22   ZeroDirective = "\t.space\t";
  23   SetDirective = "\t.set";
  24   Data64bitsDirective = isPPC64 ? "\t.quad\t" : 0;
  25   AlignmentIsInBytes = false;
  26   LCOMMDirective = "\t.lcomm\t";
  27   InlineAsmStart = "# InlineAsm Start";
  28   InlineAsmEnd = "# InlineAsm End";
  29   AssemblerDialect = TM.getSubtargetImpl()->getAsmFlavor();
  30
  31 }
  32
  33 DarwinTargetAsmInfo::DarwinTargetAsmInfo(const PPCTargetMachine &TM)
  34 : PPCTargetAsmInfo(TM)
  35 {
  36   PCSymbol = ".";
  37   CommentString = ";";
  38   GlobalPrefix = "_";
  39   PrivateGlobalPrefix = "L";
  40   ConstantPoolSection = "\t.const\t";
  41   JumpTableDataSection = ".const";
  42   CStringSection = "\t.cstring";
  43   FourByteConstantSection = "\t.literal4\n";
  44   EightByteConstantSection = "\t.literal8\n";
  45   ReadOnlySection = "\t.const\n";
  46   if (TM.getRelocationModel() == Reloc::Static) {
  47     StaticCtorsSection = ".constructor";
  48     StaticDtorsSection = ".destructor";
  49   } else {
  50     StaticCtorsSection = ".mod_init_func";
  51     StaticDtorsSection = ".mod_term_func";
  52   }
  53   SwitchToSectionDirective = "\t.section ";
  54   UsedDirective = "\t.no_dead_strip\t";
  55   WeakDefDirective = "\t.weak_definition ";
  56   WeakRefDirective = "\t.weak_reference ";
  57   HiddenDirective = "\t.private_extern ";
  58   SupportsExceptionHandling = true;
  59   NeedsIndirectEncoding = true;
  60   NeedsSet = true;
  61   BSSSection = 0;
  62
  63   DwarfEHFrameSection =
  64   ".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
  65   DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
  66   GlobalEHDirective = "\t.globl\t";
  67   SupportsWeakOmittedEHFrame = false;
  68
  69   DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
  70   DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
  71   DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
  72   DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
  73   DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
  74   DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
  75   DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
  76   DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
  77   DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
  78   DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
  79   DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
  80
  81   // In non-PIC modes, emit a special label before jump tables so that the
  82   // linker can perform more accurate dead code stripping.
  83   if (TM.getRelocationModel() != Reloc::PIC_) {
  84     // Emit a local label that is preserved until the linker runs.
  85     JumpTableSpecialLabelPrefix = "l";
  86   }
  87 }
  88
  89 LinuxTargetAsmInfo::LinuxTargetAsmInfo(const PPCTargetMachine &TM)
  90 : PPCTargetAsmInfo(TM)
  91 {
  92   CommentString = "#";
  93   GlobalPrefix = "";
  94   PrivateGlobalPrefix = "";
  95   ConstantPoolSection = "\t.section .rodata.cst4\t";
  96   JumpTableDataSection = ".section .rodata.cst4";
  97   CStringSection = "\t.section\t.rodata";
  98   StaticCtorsSection = ".section\t.ctors,\"aw\",@progbits";
  99   StaticDtorsSection = ".section\t.dtors,\"aw\",@progbits";
 100   UsedDirective = "\t# .no_dead_strip\t";
 101   WeakRefDirective = "\t.weak\t";
 102   BSSSection = "\t.section\t\".sbss\",\"aw\",@nobits";
 103
 104   // Debug Information
 105   AbsoluteDebugSectionOffsets = true;
 106   SupportsDebugInformation = true;
 107   DwarfAbbrevSection =  "\t.section\t.debug_abbrev,\"\",@progbits";
 108   DwarfInfoSection =    "\t.section\t.debug_info,\"\",@progbits";
 109   DwarfLineSection =    "\t.section\t.debug_line,\"\",@progbits";
 110   DwarfFrameSection =   "\t.section\t.debug_frame,\"\",@progbits";
 111   DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
 112   DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
 113   DwarfStrSection =     "\t.section\t.debug_str,\"\",@progbits";
 114   DwarfLocSection =     "\t.section\t.debug_loc,\"\",@progbits";
 115   DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
 116   DwarfRangesSection =  "\t.section\t.debug_ranges,\"\",@progbits";
 117   DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
 118
 119   ReadOnlySection = "\t.section\t.rodata";
 120   FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
 121   EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
 122   SixteenByteConstantSection = "\t.section\t.rodata.cst16,\"aM\",@progbits,16";
 123   PCSymbol = ".";
 124
 125   // Set up DWARF directives
 126   HasLEB128 = true;  // Target asm supports leb128 directives (little-endian)
 127
 128   // Exceptions handling
 129   if (!TM.getSubtargetImpl()->isPPC64())
 130     SupportsExceptionHandling = true;
 131   AbsoluteEHSectionOffsets = false;
 132   DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
 133   DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
 134 }