MCSection.cpp revision 93b6db3de934a3cfca5586df25184fef4a54c500
1//===- lib/MC/MCSection.cpp - Machine Code Section Representation ---------===// 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#include "llvm/MC/MCSection.h" 11#include "llvm/MC/MCContext.h" 12#include "llvm/Target/TargetAsmInfo.h" 13#include "llvm/Support/raw_ostream.h" 14using namespace llvm; 15 16//===----------------------------------------------------------------------===// 17// MCSection 18//===----------------------------------------------------------------------===// 19 20MCSection::~MCSection() { 21} 22 23 24//===----------------------------------------------------------------------===// 25// MCSectionELF 26//===----------------------------------------------------------------------===// 27 28MCSectionELF *MCSectionELF:: 29Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) { 30 return new (Ctx) MCSectionELF(Name, IsDirective, K, Ctx); 31} 32 33MCSectionELF::MCSectionELF(const StringRef &name, bool isDirective, 34 SectionKind K, MCContext &Ctx) 35 : MCSection(K), Name(name), IsDirective(isDirective) { 36 Ctx.SetSection(Name, this); 37} 38 39 40void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI, 41 raw_ostream &OS) const { 42 if (isDirective()) { 43 OS << getName() << '\n'; 44 return; 45 } 46 47 OS << "\t.section\t" << getName(); 48 49 // Handle the weird solaris syntax if desired. 50 if (TAI.usesSunStyleELFSectionSwitchSyntax() && 51 !getKind().isMergeableConst() && !getKind().isMergeableCString()) { 52 if (!getKind().isMetadata()) 53 OS << ",#alloc"; 54 if (getKind().isText()) 55 OS << ",#execinstr"; 56 if (getKind().isWriteable()) 57 OS << ",#write"; 58 if (getKind().isThreadLocal()) 59 OS << ",#tls"; 60 } else { 61 OS << ",\""; 62 63 if (!getKind().isMetadata()) 64 OS << 'a'; 65 if (getKind().isText()) 66 OS << 'x'; 67 if (getKind().isWriteable()) 68 OS << 'w'; 69 if (getKind().isMergeable1ByteCString() || 70 getKind().isMergeable2ByteCString() || 71 getKind().isMergeable4ByteCString() || 72 getKind().isMergeableConst4() || 73 getKind().isMergeableConst8() || 74 getKind().isMergeableConst16()) 75 OS << 'M'; 76 if (getKind().isMergeable1ByteCString() || 77 getKind().isMergeable2ByteCString() || 78 getKind().isMergeable4ByteCString()) 79 OS << 'S'; 80 if (getKind().isThreadLocal()) 81 OS << 'T'; 82 83 OS << "\","; 84 85 // If comment string is '@', e.g. as on ARM - use '%' instead 86 if (TAI.getCommentString()[0] == '@') 87 OS << '%'; 88 else 89 OS << '@'; 90 91 if (getKind().isBSS() || getKind().isThreadBSS()) 92 OS << "nobits"; 93 else 94 OS << "progbits"; 95 96 if (getKind().isMergeable1ByteCString()) { 97 OS << ",1"; 98 } else if (getKind().isMergeable2ByteCString()) { 99 OS << ",2"; 100 } else if (getKind().isMergeable4ByteCString()) { 101 OS << ",4"; 102 } else if (getKind().isMergeableConst4()) { 103 OS << ",4"; 104 } else if (getKind().isMergeableConst8()) { 105 OS << ",8"; 106 } else if (getKind().isMergeableConst16()) { 107 OS << ",16"; 108 } 109 } 110} 111 112//===----------------------------------------------------------------------===// 113// MCSectionMachO 114//===----------------------------------------------------------------------===// 115 116MCSectionMachO *MCSectionMachO:: 117Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) { 118 return new (Ctx) MCSectionMachO(Name, IsDirective, K, Ctx); 119} 120 121MCSectionMachO::MCSectionMachO(const StringRef &name, bool isDirective, 122 SectionKind K, MCContext &Ctx) 123 : MCSection(K), Name(name), IsDirective(isDirective) { 124 Ctx.SetSection(Name, this); 125} 126 127void MCSectionMachO::PrintSwitchToSection(const TargetAsmInfo &TAI, 128 raw_ostream &OS) const { 129 if (!isDirective()) 130 OS << "\t.section\t" << getName() << '\n'; 131 else 132 OS << getName() << '\n'; 133} 134 135//===----------------------------------------------------------------------===// 136// MCSectionCOFF 137//===----------------------------------------------------------------------===// 138 139MCSectionCOFF *MCSectionCOFF:: 140Create(const StringRef &Name, bool IsDirective, SectionKind K, MCContext &Ctx) { 141 return new (Ctx) MCSectionCOFF(Name, IsDirective, K, Ctx); 142} 143 144MCSectionCOFF::MCSectionCOFF(const StringRef &name, bool isDirective, 145 SectionKind K, MCContext &Ctx) 146 : MCSection(K), Name(name), IsDirective(isDirective) { 147 Ctx.SetSection(Name, this); 148} 149 150 151void MCSectionCOFF::PrintSwitchToSection(const TargetAsmInfo &TAI, 152 raw_ostream &OS) const { 153 154 if (isDirective()) { 155 OS << getName() << '\n'; 156 return; 157 } 158 OS << "\t.section\t" << getName() << ",\""; 159 if (getKind().isText()) 160 OS << 'x'; 161 if (getKind().isWriteable()) 162 OS << 'w'; 163 OS << "\"\n"; 164} 165