1362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===-- llvm/CodeGen/TargetLoweringObjectFileImpl.cpp - Object File Info --===// 2362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// 3362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// The LLVM Compiler Infrastructure 4362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// 5362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// This file is distributed under the University of Illinois Open Source 6362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// License. See LICENSE.TXT for details. 7362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// 8362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 9362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// 10362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// This file implements classes used to handle lowerings specific to common 11362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// object file formats. 12362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// 13362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 14362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 15362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h" 16362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Constants.h" 17362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/DerivedTypes.h" 18362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Function.h" 19362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/GlobalVariable.h" 20b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling#include "llvm/Module.h" 21362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/CodeGen/MachineModuleInfoImpls.h" 22362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/MC/MCContext.h" 23362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/MC/MCExpr.h" 24362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/MC/MCSectionMachO.h" 25362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/MC/MCSectionELF.h" 26eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner#include "llvm/MC/MCSectionCOFF.h" 2730deafc84adf88f643cdc39dc97a37537155347fRafael Espindola#include "llvm/MC/MCStreamer.h" 28362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/MC/MCSymbol.h" 29362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Target/Mangler.h" 30362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Target/TargetData.h" 31362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Target/TargetMachine.h" 32362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Target/TargetOptions.h" 33362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Support/Dwarf.h" 34c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola#include "llvm/Support/ELF.h" 35362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Support/ErrorHandling.h" 36362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/Support/raw_ostream.h" 37362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/ADT/SmallString.h" 38362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov#include "llvm/ADT/StringExtras.h" 398048ebe91d76f5ee58f5c2c7535151d782af4b29Chris Lattner#include "llvm/ADT/Triple.h" 40362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovusing namespace llvm; 41293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikovusing namespace dwarf; 42362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 43362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 44362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// ELF 45362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 46362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 4730deafc84adf88f643cdc39dc97a37537155347fRafael EspindolaMCSymbol * 487afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael EspindolaTargetLoweringObjectFileELF::getCFIPersonalitySymbol(const GlobalValue *GV, 497afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola Mangler *Mang, 507afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MachineModuleInfo *MMI) const { 5160246a96224c8b790177253bf25433b93b335d2bRafael Espindola unsigned Encoding = getPersonalityEncoding(); 527afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola switch (Encoding & 0x70) { 537afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola default: 547afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola report_fatal_error("We do not support this DWARF encoding yet!"); 557afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola case dwarf::DW_EH_PE_absptr: 567afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola return Mang->getSymbol(GV); 577afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola case dwarf::DW_EH_PE_pcrel: { 58fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola return getContext().GetOrCreateSymbol(StringRef("DW.ref.") + 59fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola Mang->getSymbol(GV)->getName()); 607afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola } 617afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola } 6230deafc84adf88f643cdc39dc97a37537155347fRafael Espindola} 6330deafc84adf88f643cdc39dc97a37537155347fRafael Espindola 6430deafc84adf88f643cdc39dc97a37537155347fRafael Espindolavoid TargetLoweringObjectFileELF::emitPersonalityValue(MCStreamer &Streamer, 6530deafc84adf88f643cdc39dc97a37537155347fRafael Espindola const TargetMachine &TM, 667afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola const MCSymbol *Sym) const { 67fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola SmallString<64> NameData("DW.ref."); 68fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola NameData += Sym->getName(); 69fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola MCSymbol *Label = getContext().GetOrCreateSymbol(NameData); 70018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitSymbolAttribute(Label, MCSA_Hidden); 71018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitSymbolAttribute(Label, MCSA_Weak); 72fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola StringRef Prefix = ".data."; 73fb66f477a1c1cdde2670163bd60e42139a5009d8Rafael Espindola NameData.insert(NameData.begin(), Prefix.begin(), Prefix.end()); 74018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE | ELF::SHF_GROUP; 75018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola const MCSection *Sec = getContext().getELFSection(NameData, 76018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola ELF::SHT_PROGBITS, 77018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Flags, 78018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola SectionKind::getDataRel(), 79018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola 0, Label->getName()); 80ca5b752d1873707c5c7d846515998ccf5002edcaDavid Chisnall unsigned Size = TM.getTargetData()->getPointerSize(); 81018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.SwitchSection(Sec); 8250f603fff686df4a5ffaf01aa7af43aa64cf4615David Chisnall Streamer.EmitValueToAlignment(TM.getTargetData()->getPointerABIAlignment()); 83018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitSymbolAttribute(Label, MCSA_ELF_TypeObject); 84ca5b752d1873707c5c7d846515998ccf5002edcaDavid Chisnall const MCExpr *E = MCConstantExpr::Create(Size, getContext()); 85018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitELFSize(Label, E); 86018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitLabel(Label); 87018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola 88018e38c6dd8794c6c58be518ddaae99033f6d080Rafael Espindola Streamer.EmitSymbolValue(Sym, Size); 8930deafc84adf88f643cdc39dc97a37537155347fRafael Espindola} 9030deafc84adf88f643cdc39dc97a37537155347fRafael Espindola 91362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovstatic SectionKind 92362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetELFKindForNamedSection(StringRef Name, SectionKind K) { 93e6657980977ed63df8bbd2604c9fefe513ac4126Rafael Espindola // N.B.: The defaults used in here are no the same ones used in MC. 94e6657980977ed63df8bbd2604c9fefe513ac4126Rafael Espindola // We follow gcc, MC follows gas. For example, given ".section .eh_frame", 95e6657980977ed63df8bbd2604c9fefe513ac4126Rafael Espindola // both gas and MC will produce a section with no flags. Given 96e6657980977ed63df8bbd2604c9fefe513ac4126Rafael Espindola // section(".eh_frame") gcc will produce 97e6657980977ed63df8bbd2604c9fefe513ac4126Rafael Espindola // .section .eh_frame,"a",@progbits 98362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name.empty() || Name[0] != '.') return K; 99362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 100362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Some lame default implementation based on some magic section names. 101362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".bss" || 102362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".bss.") || 103362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".gnu.linkonce.b.") || 104362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".llvm.linkonce.b.") || 105362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name == ".sbss" || 106362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".sbss.") || 107362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".gnu.linkonce.sb.") || 108362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".llvm.linkonce.sb.")) 109362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return SectionKind::getBSS(); 110362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 111362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".tdata" || 112362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".tdata.") || 113362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".gnu.linkonce.td.") || 114362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".llvm.linkonce.td.")) 115362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return SectionKind::getThreadData(); 116362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 117362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".tbss" || 118362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".tbss.") || 119362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".gnu.linkonce.tb.") || 120362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name.startswith(".llvm.linkonce.tb.")) 121362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return SectionKind::getThreadBSS(); 122362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 123362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return K; 124362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 125362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 126362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 127362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovstatic unsigned getELFSectionType(StringRef Name, SectionKind K) { 128362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 129362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".init_array") 130c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return ELF::SHT_INIT_ARRAY; 131362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 132362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".fini_array") 133c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return ELF::SHT_FINI_ARRAY; 134362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 135362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Name == ".preinit_array") 136c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return ELF::SHT_PREINIT_ARRAY; 137362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 138362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (K.isBSS() || K.isThreadBSS()) 139c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return ELF::SHT_NOBITS; 140362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 141c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return ELF::SHT_PROGBITS; 142362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 143362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 144362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 145362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovstatic unsigned 146362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetELFSectionFlags(SectionKind K) { 147362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov unsigned Flags = 0; 148362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 149362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (!K.isMetadata()) 1501c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_ALLOC; 151362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 152362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (K.isText()) 1531c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_EXECINSTR; 154362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 155d846e3fb5a36c625df1bea3d4ef4e337b7b6e917Rafael Espindola if (K.isWriteable()) 1561c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_WRITE; 157362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 158362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (K.isThreadLocal()) 1591c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_TLS; 160362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 161362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // K.isMergeableConst() is left out to honour PR4650 162362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (K.isMergeableCString() || K.isMergeableConst4() || 163362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov K.isMergeableConst8() || K.isMergeableConst16()) 1641c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_MERGE; 165362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 166362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (K.isMergeableCString()) 1671c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola Flags |= ELF::SHF_STRINGS; 168362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 169362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return Flags; 170362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 171362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 172362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 173362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileELF:: 174362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 175362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mangler *Mang, const TargetMachine &TM) const { 176362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov StringRef SectionName = GV->getSection(); 177362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 178362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Infer section flags from the section name if we can. 179362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Kind = getELFKindForNamedSection(SectionName, Kind); 180362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 181287df1bc0309962770b6c176f2d143795dd3cc2fChris Lattner return getContext().getELFSection(SectionName, 182287df1bc0309962770b6c176f2d143795dd3cc2fChris Lattner getELFSectionType(SectionName, Kind), 18334be396a12b00a95a1353c356d64868798ea3098Rafael Espindola getELFSectionFlags(Kind), Kind); 184362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 185362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 18643ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner/// getSectionPrefixForGlobal - Return the section prefix name used by options 18743ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner/// FunctionsSections and DataSections. 18843ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattnerstatic const char *getSectionPrefixForGlobal(SectionKind Kind) { 18943ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isText()) return ".text."; 19043ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isReadOnly()) return ".rodata."; 1911d2d5a0227d6f1381f3ffa9c331045bdfa409ee8Anton Korobeynikov if (Kind.isBSS()) return ".bss."; 19243ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 19343ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isThreadData()) return ".tdata."; 19443ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isThreadBSS()) return ".tbss."; 19543ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 19643ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isDataNoRel()) return ".data."; 19743ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isDataRelLocal()) return ".data.rel.local."; 19843ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isDataRel()) return ".data.rel."; 19943ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isReadOnlyWithRelLocal()) return ".data.rel.ro.local."; 20043ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 20143ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 20243ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner return ".data.rel.ro."; 20343ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner} 20443ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 20543ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 206362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileELF:: 207362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 208362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mangler *Mang, const TargetMachine &TM) const { 20943ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner // If we have -ffunction-section or -fdata-section then we should emit the 21043ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner // global value to a uniqued section specifically for it. 21143ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner bool EmitUniquedSection; 21243ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if (Kind.isText()) 21343ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner EmitUniquedSection = TM.getFunctionSections(); 214579d7a3dccaf3c2e91ee81c026c47a0850803820Michael J. Spencer else 21543ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner EmitUniquedSection = TM.getDataSections(); 216362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 217362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If this global is linkonce/weak and the target handles this by emitting it 218362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // into a 'uniqued' section name, create and return the section now. 21943ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner if ((GV->isWeakForLinker() || EmitUniquedSection) && 2201d2d5a0227d6f1381f3ffa9c331045bdfa409ee8Anton Korobeynikov !Kind.isCommon()) { 22143ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner const char *Prefix; 2225d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola Prefix = getSectionPrefixForGlobal(Kind); 22343ac721e3b35341e7cf59d5982ad702ca8d27433Chris Lattner 2244c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner SmallString<128> Name(Prefix, Prefix+strlen(Prefix)); 2254c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MCSymbol *Sym = Mang->getSymbol(GV); 2264c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner Name.append(Sym->getName().begin(), Sym->getName().end()); 2275d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola StringRef Group = ""; 2285d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola unsigned Flags = getELFSectionFlags(Kind); 2295d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola if (GV->isWeakForLinker()) { 2305d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola Group = Sym->getName(); 2315d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola Flags |= ELF::SHF_GROUP; 2325d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola } 2335d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola 234287df1bc0309962770b6c176f2d143795dd3cc2fChris Lattner return getContext().getELFSection(Name.str(), 235287df1bc0309962770b6c176f2d143795dd3cc2fChris Lattner getELFSectionType(Name.str(), Kind), 2365d618ef7f1ad005fc6912f3e9a08c044b082e47fRafael Espindola Flags, Kind, 0, Group); 237362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 238362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 239362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isText()) return TextSection; 240362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 241362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeable1ByteCString() || 242362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Kind.isMergeable2ByteCString() || 243362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Kind.isMergeable4ByteCString()) { 244362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 245362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // We also need alignment here. 246362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // FIXME: this is getting the alignment of the character, not the 247362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // alignment of the global! 248362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov unsigned Align = 249362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)); 250362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 251362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov const char *SizeSpec = ".rodata.str1."; 252362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeable2ByteCString()) 253362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov SizeSpec = ".rodata.str2."; 254362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov else if (Kind.isMergeable4ByteCString()) 255362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov SizeSpec = ".rodata.str4."; 256362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov else 257362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov assert(Kind.isMergeable1ByteCString() && "unknown string width"); 258362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 259362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 260362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov std::string Name = SizeSpec + utostr(Align); 261c85dca66e68c9fa6ffa8471c64113b12d8d94fb1Rafael Espindola return getContext().getELFSection(Name, ELF::SHT_PROGBITS, 2621c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola ELF::SHF_ALLOC | 2631c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola ELF::SHF_MERGE | 2641c13026e8f94bd332c0979baa9c777da99d48736Rafael Espindola ELF::SHF_STRINGS, 265287df1bc0309962770b6c176f2d143795dd3cc2fChris Lattner Kind); 266362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 267362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 268362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst()) { 269362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst4() && MergeableConst4Section) 270362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst4Section; 271362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst8() && MergeableConst8Section) 272362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst8Section; 273362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst16() && MergeableConst16Section) 274362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst16Section; 275362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ReadOnlySection; // .const 276362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 277362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 278362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnly()) return ReadOnlySection; 279362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 280362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isThreadData()) return TLSDataSection; 281362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isThreadBSS()) return TLSBSSSection; 282362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 283362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Note: we claim that common symbols are put in BSSSection, but they are 284362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // really emitted with the magic .comm directive, which creates a symbol table 285362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // entry but not a section. 286362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isBSS() || Kind.isCommon()) return BSSSection; 287362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 288362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isDataNoRel()) return DataSection; 289362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isDataRelLocal()) return DataRelLocalSection; 290362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isDataRel()) return DataRelSection; 291362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection; 292362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 293362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 294362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataRelROSection; 295362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 296362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 297362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov/// getSectionForConstant - Given a mergeable constant with the 298362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov/// specified size and relocation information, return a section that it 299362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov/// should be placed in. 300362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileELF:: 301362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetSectionForConstant(SectionKind Kind) const { 302362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst4() && MergeableConst4Section) 303362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst4Section; 304362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst8() && MergeableConst8Section) 305362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst8Section; 306362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst16() && MergeableConst16Section) 307362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return MergeableConst16Section; 308362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnly()) 309362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ReadOnlySection; 310362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 311362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnlyWithRelLocal()) return DataRelROLocalSection; 312362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov assert(Kind.isReadOnlyWithRel() && "Unknown section kind"); 313362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataRelROSection; 314362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 315362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 316362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCExpr *TargetLoweringObjectFileELF:: 3173192d14076dbe5724ce85b9d48644bb3c081f0e5Chris LattnergetExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, 3183192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner MachineModuleInfo *MMI, 3193192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner unsigned Encoding, MCStreamer &Streamer) const { 320362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 321362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Encoding & dwarf::DW_EH_PE_indirect) { 322362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>(); 323362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 324362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov SmallString<128> Name; 325362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mang->getNameWithPrefix(Name, GV, true); 326362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name += ".DW.stub"; 327362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 328362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Add information about the stub reference to ELFMMI so that the stub 329362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // gets emitted by the asmprinter. 3309b97a73dedf736e14b04a3d1a153f10d25b2507bChris Lattner MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); 3314c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym); 332cebae36f57456fe6b0e13726acd1e0250654f02dBill Wendling if (StubSym.getPointer() == 0) { 3334c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MCSymbol *Sym = Mang->getSymbol(GV); 3344c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); 335362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 336362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 337362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return TargetLoweringObjectFile:: 3384788c3e839203dc75ba9fe2026f315095677715cRafael Espindola getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); 339362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 340362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 341362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return TargetLoweringObjectFile:: 3423192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer); 343362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 344362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 3454a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikovconst MCSection * 3464a99f59aef358fb93eac180e49f6dcef03822046Anton KorobeynikovTargetLoweringObjectFileELF::getStaticCtorSection(unsigned Priority) const { 3474a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov // The default scheme is .ctor / .dtor, so we have to invert the priority 3484a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov // numbering. 3494a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov if (Priority == 65535) 3504a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov return StaticCtorSection; 3514a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov 3524a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov std::string Name = std::string(".ctors.") + utostr(65535 - Priority); 3534a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov return getContext().getELFSection(Name, ELF::SHT_PROGBITS, 3544a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov ELF::SHF_ALLOC |ELF::SHF_WRITE, 3554a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov SectionKind::getDataRel()); 3564a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov} 3574a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov 3584a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikovconst MCSection * 3594a99f59aef358fb93eac180e49f6dcef03822046Anton KorobeynikovTargetLoweringObjectFileELF::getStaticDtorSection(unsigned Priority) const { 3604a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov // The default scheme is .ctor / .dtor, so we have to invert the priority 3614a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov // numbering. 3624a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov if (Priority == 65535) 3634a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov return StaticDtorSection; 3644a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov 3654a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov std::string Name = std::string(".dtors.") + utostr(65535 - Priority); 3664a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov return getContext().getELFSection(Name, ELF::SHT_PROGBITS, 3674a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov ELF::SHF_ALLOC |ELF::SHF_WRITE, 3684a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov SectionKind::getDataRel()); 3694a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov} 3704a99f59aef358fb93eac180e49f6dcef03822046Anton Korobeynikov 371362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 372362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// MachO 373362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 374362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 375b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling/// emitModuleFlags - Emit the module flags that specify the garbage collection 376b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling/// information. 377b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendlingvoid TargetLoweringObjectFileMachO:: 378057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill WendlingemitModuleFlags(MCStreamer &Streamer, 379057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling ArrayRef<Module::ModuleFlagEntry> ModuleFlags, 380b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling Mangler *Mang, const TargetMachine &TM) const { 381b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling unsigned VersionVal = 0; 382b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling unsigned GCFlags = 0; 383057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling StringRef SectionVal; 384b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 385057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling for (ArrayRef<Module::ModuleFlagEntry>::iterator 386057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling i = ModuleFlags.begin(), e = ModuleFlags.end(); i != e; ++i) { 387057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling const Module::ModuleFlagEntry &MFE = *i; 388b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 389b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling // Ignore flags with 'Require' behavior. 390057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling if (MFE.Behavior == Module::Require) 391b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling continue; 392b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 393057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling StringRef Key = MFE.Key->getString(); 394057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling Value *Val = MFE.Val; 395b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 396057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling if (Key == "Objective-C Image Info Version") 397b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling VersionVal = cast<ConstantInt>(Val)->getZExtValue(); 398057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling else if (Key == "Objective-C Garbage Collection" || 399057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling Key == "Objective-C GC Only") 400b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling GCFlags |= cast<ConstantInt>(Val)->getZExtValue(); 401057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling else if (Key == "Objective-C Image Info Section") 402057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling SectionVal = cast<MDString>(Val)->getString(); 403b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling } 404b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 405057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling // The section is mandatory. If we don't have it, then we don't have GC info. 406057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling if (SectionVal.empty()) return; 407057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling 408057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling StringRef Segment, Section; 409057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling unsigned TAA = 0, StubSize = 0; 410057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling bool TAAParsed; 411057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling std::string ErrorCode = 412057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling MCSectionMachO::ParseSectionSpecifier(SectionVal, Segment, Section, 413057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling TAA, TAAParsed, StubSize); 4142de3ff50439918b5a822b3d06d4d7c5826e11e6cBill Wendling if (!ErrorCode.empty()) 415057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling // If invalid, report the error with report_fatal_error. 4162de3ff50439918b5a822b3d06d4d7c5826e11e6cBill Wendling report_fatal_error("Invalid section specifier '" + Section + "': " + 4172de3ff50439918b5a822b3d06d4d7c5826e11e6cBill Wendling ErrorCode + "."); 418b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 419057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling // Get the section. 420057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling const MCSectionMachO *S = 421057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling getContext().getMachOSection(Segment, Section, TAA, StubSize, 4222de3ff50439918b5a822b3d06d4d7c5826e11e6cBill Wendling SectionKind::getDataNoRel()); 423057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling Streamer.SwitchSection(S); 424057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling Streamer.EmitLabel(getContext(). 425057d521e3d91a894f6c38fcbc21ee5950fbdf7b1Bill Wendling GetOrCreateSymbol(StringRef("L_OBJC_IMAGE_INFO"))); 426b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling Streamer.EmitIntValue(VersionVal, 4); 427b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling Streamer.EmitIntValue(GCFlags, 4); 428b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling Streamer.AddBlankLine(); 429b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling} 430b464d3ff72790260e8c2068afe856fd7299a6834Bill Wendling 431362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileMachO:: 432362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 433362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mangler *Mang, const TargetMachine &TM) const { 434362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Parse the section specifier and create it if valid. 435362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov StringRef Segment, Section; 43665c8bca78854712ab2bf135c2008ed455ef0c9b7Stuart Hastings unsigned TAA = 0, StubSize = 0; 43765c8bca78854712ab2bf135c2008ed455ef0c9b7Stuart Hastings bool TAAParsed; 438362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov std::string ErrorCode = 439362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov MCSectionMachO::ParseSectionSpecifier(GV->getSection(), Segment, Section, 44065c8bca78854712ab2bf135c2008ed455ef0c9b7Stuart Hastings TAA, TAAParsed, StubSize); 441362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (!ErrorCode.empty()) { 44275361b69f3f327842b9dad69fa7f28ae3b688412Chris Lattner // If invalid, report the error with report_fatal_error. 443a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer report_fatal_error("Global variable '" + GV->getName() + 444a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer "' has an invalid section specifier '" + 445a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer GV->getSection() + "': " + ErrorCode + "."); 446362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 447362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 448362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Get the section. 449362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov const MCSectionMachO *S = 45022772214de79aa1c5ca38c4fb1da137d8fb30a05Chris Lattner getContext().getMachOSection(Segment, Section, TAA, StubSize, Kind); 451362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 4526ad82d81cc3061a000799ad8751f018c1301906bStuart Hastings // If TAA wasn't set by ParseSectionSpecifier() above, 4536ad82d81cc3061a000799ad8751f018c1301906bStuart Hastings // use the value returned by getMachOSection() as a default. 45465c8bca78854712ab2bf135c2008ed455ef0c9b7Stuart Hastings if (!TAAParsed) 4556ad82d81cc3061a000799ad8751f018c1301906bStuart Hastings TAA = S->getTypeAndAttributes(); 4566ad82d81cc3061a000799ad8751f018c1301906bStuart Hastings 457362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Okay, now that we got the section, verify that the TAA & StubSize agree. 458362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If the user declared multiple globals with different section flags, we need 459362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // to reject it here. 460362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (S->getTypeAndAttributes() != TAA || S->getStubSize() != StubSize) { 46175361b69f3f327842b9dad69fa7f28ae3b688412Chris Lattner // If invalid, report the error with report_fatal_error. 462a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer report_fatal_error("Global variable '" + GV->getName() + 463a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer "' section type or attributes does not match previous" 464a7b0cb759433c715065440ee2a963a04db7f2b0bBenjamin Kramer " section specifier"); 465362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 466362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 467362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return S; 468362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 469362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 470362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileMachO:: 471362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 4728116ca5134b355b897450f9a537c9c77e1f08723Eric Christopher Mangler *Mang, const TargetMachine &TM) const { 473579d7a3dccaf3c2e91ee81c026c47a0850803820Michael J. Spencer 47402b46bc9426925b90137d264216a54aa413335fdEric Christopher // Handle thread local data. 4758116ca5134b355b897450f9a537c9c77e1f08723Eric Christopher if (Kind.isThreadBSS()) return TLSBSSSection; 47602b46bc9426925b90137d264216a54aa413335fdEric Christopher if (Kind.isThreadData()) return TLSDataSection; 477362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 478362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isText()) 479362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return GV->isWeakForLinker() ? TextCoalSection : TextSection; 480362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 481362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If this is weak/linkonce, put this in a coalescable section, either in text 482362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // or data depending on if it is writable. 483362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (GV->isWeakForLinker()) { 484362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnly()) 485362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ConstTextCoalSection; 486362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataCoalSection; 487362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 488362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 489362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // FIXME: Alignment check should be handled by section classifier. 49098f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner if (Kind.isMergeable1ByteCString() && 49198f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32) 49298f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner return CStringSection; 493579d7a3dccaf3c2e91ee81c026c47a0850803820Michael J. Spencer 49498f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner // Do not put 16-bit arrays in the UString section if they have an 49598f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner // externally visible label, this runs into issues with certain linker 49698f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner // versions. 49798f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner if (Kind.isMergeable2ByteCString() && !GV->hasExternalLinkage() && 49898f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner TM.getTargetData()->getPreferredAlignment(cast<GlobalVariable>(GV)) < 32) 49998f15d27cda62ca2f973da0244b6b5e15f18acb7Chris Lattner return UStringSection; 500362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 501362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst()) { 502362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst4()) 503362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return FourByteConstantSection; 504362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst8()) 505362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return EightByteConstantSection; 506362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst16() && SixteenByteConstantSection) 507362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return SixteenByteConstantSection; 508362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 509362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 510362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Otherwise, if it is readonly, but not something we can specially optimize, 511362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // just drop it in .const. 512362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnly()) 513362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ReadOnlySection; 514362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 515362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If this is marked const, put it into a const section. But if the dynamic 516362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // linker needs to write to it, put it in the data segment. 517362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isReadOnlyWithRel()) 518362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ConstDataSection; 519362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 520362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Put zero initialized globals with strong external linkage in the 521362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // DATA, __common section with the .zerofill directive. 522362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isBSSExtern()) 523362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataCommonSection; 524362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 525362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Put zero initialized globals with local linkage in __DATA,__bss directive 526362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // with the .zerofill directive (aka .lcomm). 527362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isBSSLocal()) 528362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataBSSSection; 529579d7a3dccaf3c2e91ee81c026c47a0850803820Michael J. Spencer 530362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // Otherwise, just drop the variable in the normal data section. 531362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return DataSection; 532362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 533362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 534362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection * 535362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovTargetLoweringObjectFileMachO::getSectionForConstant(SectionKind Kind) const { 536362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If this constant requires a relocation, we have to put it in the data 537362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // segment, not in the text segment. 538362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isDataRel() || Kind.isReadOnlyWithRel()) 539362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ConstDataSection; 540362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 541362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst4()) 542362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return FourByteConstantSection; 543362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst8()) 544362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return EightByteConstantSection; 545362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isMergeableConst16() && SixteenByteConstantSection) 546362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return SixteenByteConstantSection; 547362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return ReadOnlySection; // .const 548362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 549362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 550362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov/// shouldEmitUsedDirectiveFor - This hook allows targets to selectively decide 551362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov/// not to emit the UsedDirective for some symbols in llvm.used. 552362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// FIXME: REMOVE this (rdar://7071300) 553362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovbool TargetLoweringObjectFileMachO:: 554362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovshouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const { 555362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov /// On Darwin, internally linked data beginning with "L" or "l" does not have 556362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov /// the directive emitted (this occurs in ObjC metadata). 557362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (!GV) return false; 558362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 55907d317711781d8c9268f7d6afcf1ba7eadf1d127Bill Wendling // Check whether the mangled name has the "Private" or "LinkerPrivate" prefix. 560362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (GV->hasLocalLinkage() && !isa<Function>(GV)) { 561362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // FIXME: ObjC metadata is currently emitted as internal symbols that have 56207d317711781d8c9268f7d6afcf1ba7eadf1d127Bill Wendling // \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and 56307d317711781d8c9268f7d6afcf1ba7eadf1d127Bill Wendling // this horrible hack can go away. 5644c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MCSymbol *Sym = Mang->getSymbol(GV); 5654c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner if (Sym->getName()[0] == 'L' || Sym->getName()[0] == 'l') 566362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return false; 567362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 568362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 569362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return true; 570362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 571362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 572362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCExpr *TargetLoweringObjectFileMachO:: 5733192d14076dbe5724ce85b9d48644bb3c081f0e5Chris LattnergetExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, 5743192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner MachineModuleInfo *MMI, unsigned Encoding, 5753192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner MCStreamer &Streamer) const { 576362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // The mach-o version of this method defaults to returning a stub reference. 577362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 578293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov if (Encoding & DW_EH_PE_indirect) { 579293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov MachineModuleInfoMachO &MachOMMI = 580293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov MMI->getObjFileInfo<MachineModuleInfoMachO>(); 581293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov 582362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov SmallString<128> Name; 583362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mang->getNameWithPrefix(Name, GV, true); 584362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Name += "$non_lazy_ptr"; 585293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov 586293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov // Add information about the stub reference to MachOMMI so that the stub 587293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov // gets emitted by the asmprinter. 5889b97a73dedf736e14b04a3d1a153f10d25b2507bChris Lattner MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); 589671215464c8335e383fa2db90df2eab73ef83b10Bill Wendling MachineModuleInfoImpl::StubValueTy &StubSym = 590671215464c8335e383fa2db90df2eab73ef83b10Bill Wendling GV->hasHiddenVisibility() ? MachOMMI.getHiddenGVStubEntry(SSym) : 591671215464c8335e383fa2db90df2eab73ef83b10Bill Wendling MachOMMI.getGVStubEntry(SSym); 592cebae36f57456fe6b0e13726acd1e0250654f02dBill Wendling if (StubSym.getPointer() == 0) { 5934c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MCSymbol *Sym = Mang->getSymbol(GV); 5944c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); 595293d592bf9cff6c3679998dde32f3cfd3cd53bc4Anton Korobeynikov } 596362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 597362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return TargetLoweringObjectFile:: 5984788c3e839203dc75ba9fe2026f315095677715cRafael Espindola getExprForDwarfReference(SSym, Encoding & ~dwarf::DW_EH_PE_indirect, Streamer); 599362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 600362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 601362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return TargetLoweringObjectFile:: 6023192d14076dbe5724ce85b9d48644bb3c081f0e5Chris Lattner getExprForDwarfGlobalReference(GV, Mang, MMI, Encoding, Streamer); 603362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 604362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 6057afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael EspindolaMCSymbol *TargetLoweringObjectFileMachO:: 60660246a96224c8b790177253bf25433b93b335d2bRafael EspindolagetCFIPersonalitySymbol(const GlobalValue *GV, Mangler *Mang, 6077afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MachineModuleInfo *MMI) const { 6087afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola // The mach-o version of this method defaults to returning a stub reference. 6097afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MachineModuleInfoMachO &MachOMMI = 6107afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MMI->getObjFileInfo<MachineModuleInfoMachO>(); 6117afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola 6127afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola SmallString<128> Name; 6137afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola Mang->getNameWithPrefix(Name, GV, true); 6147afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola Name += "$non_lazy_ptr"; 6157afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola 6167afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola // Add information about the stub reference to MachOMMI so that the stub 6177afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola // gets emitted by the asmprinter. 6187afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MCSymbol *SSym = getContext().GetOrCreateSymbol(Name.str()); 619d7c2494b3cba8dce914a7d16cfca11ffcd223d4eBill Wendling MachineModuleInfoImpl::StubValueTy &StubSym = MachOMMI.getGVStubEntry(SSym); 6207afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola if (StubSym.getPointer() == 0) { 6217afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola MCSymbol *Sym = Mang->getSymbol(GV); 6227afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage()); 6237afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola } 6247afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola 6257afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola return SSym; 6267afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola} 6277afec9cc0ff1654619d30b6f30e2a4d13369c8bfRafael Espindola 628362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 629362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov// COFF 630362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov//===----------------------------------------------------------------------===// 631362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 632eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattnerstatic unsigned 633eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris LattnergetCOFFSectionFlags(SectionKind K) { 634eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner unsigned Flags = 0; 635eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner 63636335be3b95f856b7eb7e0766e01ba423315e1abAnton Korobeynikov if (K.isMetadata()) 6376e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner Flags |= 63894610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_DISCARDABLE; 639eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner else if (K.isText()) 640eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner Flags |= 64194610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_EXECUTE | 6423931b54a5f274183f850b912e0003f9aa1600584Michael J. Spencer COFF::IMAGE_SCN_MEM_READ | 64394610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_CNT_CODE; 6446e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner else if (K.isBSS ()) 6456e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner Flags |= 64694610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA | 64794610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_READ | 64894610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_WRITE; 649d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov else if (K.isThreadLocal()) 650d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov Flags |= 651d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 652d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov COFF::IMAGE_SCN_MEM_READ | 653d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov COFF::IMAGE_SCN_MEM_WRITE; 654eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner else if (K.isReadOnly()) 655eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner Flags |= 65694610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 65794610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_READ; 658eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner else if (K.isWriteable()) 659eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner Flags |= 66094610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | 66194610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_READ | 66294610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar COFF::IMAGE_SCN_MEM_WRITE; 663eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner 664eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner return Flags; 665362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 666362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 667362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileCOFF:: 668362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovgetExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind, 669362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mangler *Mang, const TargetMachine &TM) const { 670eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner return getContext().getCOFFSection(GV->getSection(), 671eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner getCOFFSectionFlags(Kind), 672eb40a0fd98c44ecc6360e7fab33cf9e9911bed4fChris Lattner Kind); 673362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 674362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 675362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovstatic const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) { 676362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isText()) 6773b3b0ebd2ec9cd1de709007f31f40790c9243511NAKAMURA Takumi return ".text$"; 6786e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner if (Kind.isBSS ()) 6793b3b0ebd2ec9cd1de709007f31f40790c9243511NAKAMURA Takumi return ".bss$"; 680d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov if (Kind.isThreadLocal()) 681d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov return ".tls$"; 682362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isWriteable()) 6833b3b0ebd2ec9cd1de709007f31f40790c9243511NAKAMURA Takumi return ".data$"; 6843b3b0ebd2ec9cd1de709007f31f40790c9243511NAKAMURA Takumi return ".rdata$"; 685362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 686362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 687362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 688362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikovconst MCSection *TargetLoweringObjectFileCOFF:: 689362dd0bef5437f85586c046bc53287b6fbe9c099Anton KorobeynikovSelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind, 690362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov Mangler *Mang, const TargetMachine &TM) const { 691362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 692362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // If this global is linkonce/weak and the target handles this by emitting it 693362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov // into a 'uniqued' section name, create and return the section now. 694362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (GV->isWeakForLinker()) { 695362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind); 696362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov SmallString<128> Name(Prefix, Prefix+strlen(Prefix)); 6974c6741f7078f3a9f655e67bf56bd4d5d427fc6bcChris Lattner MCSymbol *Sym = Mang->getSymbol(GV); 6983b3b0ebd2ec9cd1de709007f31f40790c9243511NAKAMURA Takumi Name.append(Sym->getName().begin() + 1, Sym->getName().end()); 6996e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner 7006e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner unsigned Characteristics = getCOFFSectionFlags(Kind); 7016e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner 70294610588af55ae7d16ba7d72d1e68324631ec249Daniel Dunbar Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT; 7036e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner 7046e5ce287b0e53c264af0ba37169ad964e19b5bb7Chris Lattner return getContext().getCOFFSection(Name.str(), Characteristics, 705657985eb8b8cbbde2391befafccfafbddf04242aAnton Korobeynikov COFF::IMAGE_COMDAT_SELECT_ANY, Kind); 706362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov } 707362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 708362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov if (Kind.isText()) 709362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return getTextSection(); 710362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 711d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov if (Kind.isThreadLocal()) 712d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov return getTLSDataSection(); 713d4a19b6a72d19a6f90b676aac37118664b7b7a84Anton Korobeynikov 714362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov return getDataSection(); 715362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov} 716362dd0bef5437f85586c046bc53287b6fbe9c099Anton Korobeynikov 717