MCMachOStreamer.cpp revision 97f7f4e43d2df00253b794d936be65d2afa78716
1fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar//===- lib/MC/MCMachOStreamer.cpp - Mach-O Object Output ------------===// 2fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 3fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// The LLVM Compiler Infrastructure 4fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 5fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// This file is distributed under the University of Illinois Open Source 6fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// License. See LICENSE.TXT for details. 7fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar// 8fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar//===----------------------------------------------------------------------===// 9fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 10fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCStreamer.h" 11fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 12fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCAssembler.h" 13fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCContext.h" 144fac74950a1ff08b995b366bfb84369c1507faefDaniel Dunbar#include "llvm/MC/MCCodeEmitter.h" 158c2eebe4074ef218b30d94358f6b2e45c079605cDaniel Dunbar#include "llvm/MC/MCExpr.h" 164fac74950a1ff08b995b366bfb84369c1507faefDaniel Dunbar#include "llvm/MC/MCInst.h" 178dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar#include "llvm/MC/MCObjectStreamer.h" 18fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCSection.h" 19fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/MC/MCSymbol.h" 20a6eeb6e226d7d86d04e34e3b6464f66e0a052f43Kevin Enderby#include "llvm/MC/MCMachOSymbolFlags.h" 21b07ce60981368f816af4caa3257e1e4ebf059133Kevin Enderby#include "llvm/MC/MCSectionMachO.h" 22b07ce60981368f816af4caa3257e1e4ebf059133Kevin Enderby#include "llvm/MC/MCDwarf.h" 23c095793b4ab027181605c79c9808df12afe45d63Kevin Enderby#include "llvm/Support/Dwarf.h" 24fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar#include "llvm/Support/ErrorHandling.h" 254fac74950a1ff08b995b366bfb84369c1507faefDaniel Dunbar#include "llvm/Support/raw_ostream.h" 26d8036fb0deb7daff7959b0a5407c8a45acb5e603Daniel Dunbar#include "llvm/Target/TargetAsmBackend.h" 2789b9372605db2ce3b0085c84089e389f7bc1fbddRafael Espindola#include "llvm/Target/TargetAsmInfo.h" 28d8036fb0deb7daff7959b0a5407c8a45acb5e603Daniel Dunbar 29fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarusing namespace llvm; 30fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 31fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarnamespace { 32fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 338dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbarclass MCMachOStreamer : public MCObjectStreamer { 346aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbarprivate: 35f89671d994ba27e2816a7e49eb8bbc1b43d2a147Rafael Espindola virtual void EmitInstToData(const MCInst &Inst); 362ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar 37fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarpublic: 381f3e445184e5ca2aa4295c2a77f2a4e0b957fea1Daniel Dunbar MCMachOStreamer(MCContext &Context, TargetAsmBackend &TAB, 398dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar raw_ostream &OS, MCCodeEmitter *Emitter) 4085f2ecc697a8ca6c8cf08093054cbbb9d2060ccfRafael Espindola : MCObjectStreamer(Context, TAB, OS, Emitter) {} 41ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar 42fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar /// @name MCStreamer Interface 43fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar /// @{ 44fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 45d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola virtual void InitSections(); 46fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar virtual void EmitLabel(MCSymbol *Symbol); 478bca4106dfc2945723251db10e340183f3e372ddRafael Espindola virtual void EmitEHSymAttributes(const MCSymbol *Symbol, 488bca4106dfc2945723251db10e340183f3e372ddRafael Espindola MCSymbol *EHSymbol); 49a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner virtual void EmitAssemblerFlag(MCAssemblerFlag Flag); 50ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach virtual void EmitThumbFunc(MCSymbol *Func); 51821e3334ed3390d931f497300e6a5f1dc21bcfb3Daniel Dunbar virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value); 52a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute); 53fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue); 549eb158d5b4cd4f6fc80912e2dd77bdf13c3ca0e7Chris Lattner virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, 557092c7e1dcf9d05741b400dd54bbd7d3419773b2Daniel Dunbar unsigned ByteAlignment); 56b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) { 57b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner assert(0 && "macho doesn't support this directive"); 58b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner } 59b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner virtual void EmitCOFFSymbolStorageClass(int StorageClass) { 60b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner assert(0 && "macho doesn't support this directive"); 61b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner } 62b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner virtual void EmitCOFFSymbolType(int Type) { 63b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner assert(0 && "macho doesn't support this directive"); 64b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner } 65b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner virtual void EndCOFFSymbolDef() { 66b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner assert(0 && "macho doesn't support this directive"); 67b54b9ddaaf2d258767d360583642ed1b91075fc9Chris Lattner } 6899328add833807f12a4950c7de29fb2a5df04703Chris Lattner virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) { 6999328add833807f12a4950c7de29fb2a5df04703Chris Lattner assert(0 && "macho doesn't support this directive"); 7099328add833807f12a4950c7de29fb2a5df04703Chris Lattner } 719eb158d5b4cd4f6fc80912e2dd77bdf13c3ca0e7Chris Lattner virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) { 729eb158d5b4cd4f6fc80912e2dd77bdf13c3ca0e7Chris Lattner assert(0 && "macho doesn't support this directive"); 739eb158d5b4cd4f6fc80912e2dd77bdf13c3ca0e7Chris Lattner } 748751b94ffbd9c49df8949a37f78d6bd0be87b256Daniel Dunbar virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0, 757092c7e1dcf9d05741b400dd54bbd7d3419773b2Daniel Dunbar unsigned Size = 0, unsigned ByteAlignment = 0); 76011c3f110bca748db66e437924f936a62f1969bfEric Christopher virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, 77011c3f110bca748db66e437924f936a62f1969bfEric Christopher uint64_t Size, unsigned ByteAlignment = 0); 78aaec205b87637cd0d59d4f11630db603686eb73dChris Lattner virtual void EmitBytes(StringRef Data, unsigned AddrSpace); 79fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0, 80fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar unsigned ValueSize = 1, 81fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar unsigned MaxBytesToEmit = 0); 826e72048add2a6464e038121c6c275da37528aa0aKevin Enderby virtual void EmitCodeAlignment(unsigned ByteAlignment, 836e72048add2a6464e038121c6c275da37528aa0aKevin Enderby unsigned MaxBytesToEmit = 0); 842ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar 85a6594fc7156c0afbe6fd5a6aab9b099aaf950c53Chris Lattner virtual void EmitFileDirective(StringRef Filename) { 8696749678c9d4cf73d8cbc108a2f2f4872e4e4413Daniel Dunbar // FIXME: Just ignore the .file; it isn't important enough to fail the 8796749678c9d4cf73d8cbc108a2f2f4872e4e4413Daniel Dunbar // entire assembly. 8896749678c9d4cf73d8cbc108a2f2f4872e4e4413Daniel Dunbar 8996749678c9d4cf73d8cbc108a2f2f4872e4e4413Daniel Dunbar //report_fatal_error("unsupported directive: '.file'"); 90a6594fc7156c0afbe6fd5a6aab9b099aaf950c53Chris Lattner } 912ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar 92a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar virtual void Finish(); 93a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar 94fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar /// @} 95fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar}; 96fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 97fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} // end anonymous namespace. 98fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 99d80781b98b771d370730ab7c630018f23e202b57Rafael Espindolavoid MCMachOStreamer::InitSections() { 100d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola SwitchSection(getContext().getMachOSection("__TEXT", "__text", 101d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 102d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola 0, SectionKind::getText())); 103d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola 104d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola} 105d80781b98b771d370730ab7c630018f23e202b57Rafael Espindola 1068bca4106dfc2945723251db10e340183f3e372ddRafael Espindolavoid MCMachOStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, 1078bca4106dfc2945723251db10e340183f3e372ddRafael Espindola MCSymbol *EHSymbol) { 1088bca4106dfc2945723251db10e340183f3e372ddRafael Espindola MCSymbolData &SD = 1098bca4106dfc2945723251db10e340183f3e372ddRafael Espindola getAssembler().getOrCreateSymbolData(*Symbol); 1108bca4106dfc2945723251db10e340183f3e372ddRafael Espindola if (SD.isExternal()) 1118bca4106dfc2945723251db10e340183f3e372ddRafael Espindola EmitSymbolAttribute(EHSymbol, MCSA_Global); 1128bca4106dfc2945723251db10e340183f3e372ddRafael Espindola if (SD.getFlags() & SF_WeakDefinition) 1138bca4106dfc2945723251db10e340183f3e372ddRafael Espindola EmitSymbolAttribute(EHSymbol, MCSA_WeakDefinition); 11497f7f4e43d2df00253b794d936be65d2afa78716Rafael Espindola if (SD.isPrivateExtern()) 11597f7f4e43d2df00253b794d936be65d2afa78716Rafael Espindola EmitSymbolAttribute(EHSymbol, MCSA_PrivateExtern); 1168bca4106dfc2945723251db10e340183f3e372ddRafael Espindola} 1178bca4106dfc2945723251db10e340183f3e372ddRafael Espindola 118fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarvoid MCMachOStreamer::EmitLabel(MCSymbol *Symbol) { 119ba210243ef7d325ef6954d459091edf580a241f9Rafael Espindola assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); 120ba210243ef7d325ef6954d459091edf580a241f9Rafael Espindola 121ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola // isSymbolLinkerVisible uses the section. 1227768a9dce14431018133cd586f5c8ce3e057f069Rafael Espindola Symbol->setSection(*getCurrentSection()); 123a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // We have to create a new fragment if this is an atom defining symbol, 124a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // fragments cannot span atoms. 125ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola if (getAssembler().isSymbolLinkerVisible(*Symbol)) 126a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar new MCDataFragment(getCurrentSectionData()); 127071f73db4a0c3f7f00ef14d38af17f3c8d69827aDaniel Dunbar 128ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCObjectStreamer::EmitLabel(Symbol); 1296aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 130ea4afa91eb453323948588ad1e1706d842fb9007Rafael Espindola MCSymbolData &SD = getAssembler().getSymbolData(*Symbol); 131b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // This causes the reference type flag to be cleared. Darwin 'as' was "trying" 132b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // to clear the weak reference and weak definition bits too, but the 133b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // implementation was buggy. For now we just try to match 'as', for 134b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // diffability. 135b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // 136b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // FIXME: Cleanup this code, these bits should be emitted based on semantic 137b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // properties, not on the order of definition, etc. 138b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar SD.setFlags(SD.getFlags() & ~SF_ReferenceTypeMask); 139fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 140fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 141a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattnervoid MCMachOStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) { 1425be6d2af38c29e3653998978345220974cc40c01Jim Grosbach // Let the target do whatever target specific stuff it needs to do. 1435be6d2af38c29e3653998978345220974cc40c01Jim Grosbach getAssembler().getBackend().HandleAssemblerFlag(Flag); 1445be6d2af38c29e3653998978345220974cc40c01Jim Grosbach // Do any generic stuff we need to do. 1456009db486e7fba448ccb28dff676c012efade8f0Daniel Dunbar switch (Flag) { 146ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach case MCAF_SyntaxUnified: return; // no-op here. 147ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach case MCAF_Code16: return; // no-op here. 148ba21957cbd7b25e3d25a3e9befe6151000242853Jim Grosbach case MCAF_Code32: return; // no-op here. 149a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCAF_SubsectionsViaSymbols: 1508dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar getAssembler().setSubsectionsViaSymbols(true); 1518c3eaf46a1fb69004723ce78aaa82965d6474175Daniel Dunbar return; 1525c0d472b6ebc4408b97d12e1e545cafdcbd50adfChandler Carruth default: 1535c0d472b6ebc4408b97d12e1e545cafdcbd50adfChandler Carruth llvm_unreachable("invalid assembler flag!"); 1546009db486e7fba448ccb28dff676c012efade8f0Daniel Dunbar } 155fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 156fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 157b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbarvoid MCMachOStreamer::EmitThumbFunc(MCSymbol *Symbol) { 158ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach // FIXME: Flag the function ISA as thumb with DW_AT_APPLE_isa. 159475002078848d102b6577fe7283464c039b38af6Jim Grosbach 160475002078848d102b6577fe7283464c039b38af6Jim Grosbach // Remember that the function is a thumb function. Fixup and relocation 161475002078848d102b6577fe7283464c039b38af6Jim Grosbach // values will need adjusted. 162b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbar getAssembler().setIsThumbFunc(Symbol); 163b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbar 164b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbar // Mark the thumb bit on the symbol. 165b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbar MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 166b2624eda5ad0ead99ec5ab7ead47b586c96d1109Daniel Dunbar SD.setFlags(SD.getFlags() | SF_ThumbFunc); 167ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach} 168ce79299f78bb04e76e1860ab119b85d69f3a19c7Jim Grosbach 169821e3334ed3390d931f497300e6a5f1dc21bcfb3Daniel Dunbarvoid MCMachOStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) { 1708067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into 1718067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // MCObjectStreamer. 172a4d8667c870759a70aa9bea99e64b7f7e938b1a1Daniel Dunbar // FIXME: Lift context changes into super class. 1738dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar getAssembler().getOrCreateSymbolData(*Symbol); 17408a408a4b3224627db07eb27e174085d8e1d2426Daniel Dunbar Symbol->setVariableValue(AddValueSymbols(Value)); 175fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 176fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 177fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarvoid MCMachOStreamer::EmitSymbolAttribute(MCSymbol *Symbol, 178a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner MCSymbolAttr Attribute) { 1790c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar // Indirect symbols are handled differently, to match how 'as' handles 1800c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar // them. This makes writing matching .o files easier. 181a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner if (Attribute == MCSA_IndirectSymbol) { 182ad7c3d55932f949e6bd428232999088a53f54a4fDaniel Dunbar // Note that we intentionally cannot use the symbol data here; this is 183ad7c3d55932f949e6bd428232999088a53f54a4fDaniel Dunbar // important for matching the string table that 'as' generates. 1840c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar IndirectSymbolData ISD; 1850c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar ISD.Symbol = Symbol; 18683b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar ISD.SectionData = getCurrentSectionData(); 1878dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar getAssembler().getIndirectSymbols().push_back(ISD); 1880c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar return; 1890c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar } 1900c7761b3f98fee270d73f5b9c440fe15e82af263Daniel Dunbar 1916aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // Adding a symbol attribute always introduces the symbol, note that an 19246836a783ab29f9cb49655d8b9cb8f5538a626feDaniel Dunbar // important side effect of calling getOrCreateSymbolData here is to register 19346836a783ab29f9cb49655d8b9cb8f5538a626feDaniel Dunbar // the symbol with the assembler. 1948dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 1956aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 1966aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // The implementation of symbol attributes is designed to match 'as', but it 1976aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // leaves much to desired. It doesn't really make sense to arbitrarily add and 1986aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // remove flags, but 'as' allows this (in particular, see .desc). 1996aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // 2006aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // In the future it might be worth trying to make these operations more well 2016aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // defined. 2023edd9bb7a3da8526eb2f4a5dae2962a987d3d566Daniel Dunbar switch (Attribute) { 203a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Invalid: 204ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeFunction: 205ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeIndFunction: 206ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeObject: 207ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeTLS: 208ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeCommon: 209ed0ab15170f0f8fc4269d58757378bc8726b56a1Chris Lattner case MCSA_ELF_TypeNoType: 210e13a0ff8ac6c86a04397801061e1a702d4e0eab1Rafael Espindola case MCSA_ELF_TypeGnuUniqueObject: 211a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_IndirectSymbol: 212a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Hidden: 213a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Internal: 214a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Protected: 215a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Weak: 216a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Local: 2176aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar assert(0 && "Invalid symbol attribute for Mach-O!"); 2186aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 2193edd9bb7a3da8526eb2f4a5dae2962a987d3d566Daniel Dunbar 220a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Global: 2218f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar SD.setExternal(true); 222b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // This effectively clears the undefined lazy bit, in Darwin 'as', although 223b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // it isn't very consistent because it implements this as part of symbol 224b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // lookup. 225b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // 226b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // FIXME: Cleanup this code, these bits should be emitted based on semantic 227b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar // properties, not on the order of definition, etc. 228b18d2dd115d8ff3fd75bbaa90849473266236dc3Daniel Dunbar SD.setFlags(SD.getFlags() & ~SF_ReferenceTypeUndefinedLazy); 2293edd9bb7a3da8526eb2f4a5dae2962a987d3d566Daniel Dunbar break; 2306aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 231a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_LazyReference: 2326aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // FIXME: This requires -dynamic. 2336aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setFlags(SD.getFlags() | SF_NoDeadStrip); 2346aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar if (Symbol->isUndefined()) 2356aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setFlags(SD.getFlags() | SF_ReferenceTypeUndefinedLazy); 2366aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 2376aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 2386aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // Since .reference sets the no dead strip bit, it is equivalent to 2396aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // .no_dead_strip in practice. 240a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_Reference: 241a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_NoDeadStrip: 2426aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setFlags(SD.getFlags() | SF_NoDeadStrip); 2436aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 2446aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 245e8e98d7f2eaa0613442ce21ab6a040c0f04f5b4dKevin Enderby case MCSA_SymbolResolver: 246e8e98d7f2eaa0613442ce21ab6a040c0f04f5b4dKevin Enderby SD.setFlags(SD.getFlags() | SF_SymbolResolver); 247e8e98d7f2eaa0613442ce21ab6a040c0f04f5b4dKevin Enderby break; 248e8e98d7f2eaa0613442ce21ab6a040c0f04f5b4dKevin Enderby 249a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_PrivateExtern: 2506aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setExternal(true); 2516aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setPrivateExtern(true); 2526aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 2536aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 254a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_WeakReference: 2556aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // FIXME: This requires -dynamic. 2566aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar if (Symbol->isUndefined()) 2576aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setFlags(SD.getFlags() | SF_WeakReference); 2586aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 2596aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar 260a5ad93a10a5435f21090b09edb6b3a7e44967648Chris Lattner case MCSA_WeakDefinition: 2616aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // FIXME: 'as' enforces that this is defined and global. The manual claims 2626aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // it has to be in a coalesced section, but this isn't enforced. 2636aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar SD.setFlags(SD.getFlags() | SF_WeakDefinition); 2646aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar break; 265f59cac5ed36360b4c462781051f996b3499d7e0fKevin Enderby 266f59cac5ed36360b4c462781051f996b3499d7e0fKevin Enderby case MCSA_WeakDefAutoPrivate: 267f59cac5ed36360b4c462781051f996b3499d7e0fKevin Enderby SD.setFlags(SD.getFlags() | SF_WeakDefinition | SF_WeakReference); 268f59cac5ed36360b4c462781051f996b3499d7e0fKevin Enderby break; 2693edd9bb7a3da8526eb2f4a5dae2962a987d3d566Daniel Dunbar } 270fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 271fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 272fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarvoid MCMachOStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) { 2736aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar // Encode the 'desc' value into the lowest implementation defined bits. 2742ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar assert(DescValue == (DescValue & SF_DescFlagsMask) && 2756aff2fbd56d4bc2d6029f7c9bd49a97f6dc01213Daniel Dunbar "Invalid .desc value!"); 2768dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar getAssembler().getOrCreateSymbolData(*Symbol).setFlags( 2778dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar DescValue & SF_DescFlagsMask); 278fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 279fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 2809eb158d5b4cd4f6fc80912e2dd77bdf13c3ca0e7Chris Lattnervoid MCMachOStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size, 2817092c7e1dcf9d05741b400dd54bbd7d3419773b2Daniel Dunbar unsigned ByteAlignment) { 2828f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar // FIXME: Darwin 'as' does appear to allow redef of a .comm by itself. 2838f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); 2848f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar 2858dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 2868f4d146c340c9423271ebd7bb3fd32b880000bc9Daniel Dunbar SD.setExternal(true); 2877092c7e1dcf9d05741b400dd54bbd7d3419773b2Daniel Dunbar SD.setCommon(Size, ByteAlignment); 288fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 289fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 2908751b94ffbd9c49df8949a37f78d6bd0be87b256Daniel Dunbarvoid MCMachOStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol, 2917092c7e1dcf9d05741b400dd54bbd7d3419773b2Daniel Dunbar unsigned Size, unsigned ByteAlignment) { 2928dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar MCSectionData &SectData = getAssembler().getOrCreateSectionData(*Section); 293d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 294d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // The symbol may not be present, which only creates the section. 295d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar if (!Symbol) 296d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar return; 297d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 298d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // FIXME: Assert that this section has the zerofill type. 299d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 300d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar assert(Symbol->isUndefined() && "Cannot define a symbol twice!"); 301d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 3028dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol); 303d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 304e73d49eda2cb4fc30b52c4a241acf69c8af98302Daniel Dunbar // Emit an align fragment if necessary. 305e73d49eda2cb4fc30b52c4a241acf69c8af98302Daniel Dunbar if (ByteAlignment != 1) 3061c15413ebc8f4a35545a381a789a718627396d03Daniel Dunbar new MCAlignFragment(ByteAlignment, 0, 0, ByteAlignment, &SectData); 307e73d49eda2cb4fc30b52c4a241acf69c8af98302Daniel Dunbar 3084e544870c4c3f81b150e4c3b38a18d629d706b74Daniel Dunbar MCFragment *F = new MCFillFragment(0, 0, Size, &SectData); 309d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar SD.setFragment(F); 310d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 311d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar Symbol->setSection(*Section); 312d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar 313d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar // Update the maximum alignment on the zero fill section if necessary. 314d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar if (ByteAlignment > SectData.getAlignment()) 315d5a8e98ef627a35284c9b5989664514f8f163968Daniel Dunbar SectData.setAlignment(ByteAlignment); 316fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 317fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 318070c1abbc9b78fd8eef9365c5e776a13b64b9631Eric Christopher// This should always be called with the thread local bss section. Like the 319070c1abbc9b78fd8eef9365c5e776a13b64b9631Eric Christopher// .zerofill directive this doesn't actually switch sections on us. 320011c3f110bca748db66e437924f936a62f1969bfEric Christophervoid MCMachOStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol, 321011c3f110bca748db66e437924f936a62f1969bfEric Christopher uint64_t Size, unsigned ByteAlignment) { 322011c3f110bca748db66e437924f936a62f1969bfEric Christopher EmitZerofill(Section, Symbol, Size, ByteAlignment); 323011c3f110bca748db66e437924f936a62f1969bfEric Christopher return; 324482eba054ab3543ee0e1f453d3d6441092f4b76dEric Christopher} 325482eba054ab3543ee0e1f453d3d6441092f4b76dEric Christopher 326aaec205b87637cd0d59d4f11630db603686eb73dChris Lattnervoid MCMachOStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) { 3278067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into 3288067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // MCObjectStreamer. 329f70f477024a23408d3a535920e6d4750478ac9aeDaniel Dunbar getOrCreateDataFragment()->getContents().append(Data.begin(), Data.end()); 330fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 331fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 332fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbarvoid MCMachOStreamer::EmitValueToAlignment(unsigned ByteAlignment, 333fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar int64_t Value, unsigned ValueSize, 334fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar unsigned MaxBytesToEmit) { 3358067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into 3368067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // MCObjectStreamer. 337d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar if (MaxBytesToEmit == 0) 338d6f761e0eb610936a6b8495360b62696dcd85164Daniel Dunbar MaxBytesToEmit = ByteAlignment; 339a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar new MCAlignFragment(ByteAlignment, Value, ValueSize, MaxBytesToEmit, 340a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar getCurrentSectionData()); 3416e72048add2a6464e038121c6c275da37528aa0aKevin Enderby 3426e72048add2a6464e038121c6c275da37528aa0aKevin Enderby // Update the maximum alignment on the current section if necessary. 34383b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar if (ByteAlignment > getCurrentSectionData()->getAlignment()) 34483b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getCurrentSectionData()->setAlignment(ByteAlignment); 3456e72048add2a6464e038121c6c275da37528aa0aKevin Enderby} 3466e72048add2a6464e038121c6c275da37528aa0aKevin Enderby 3476e72048add2a6464e038121c6c275da37528aa0aKevin Enderbyvoid MCMachOStreamer::EmitCodeAlignment(unsigned ByteAlignment, 3486e72048add2a6464e038121c6c275da37528aa0aKevin Enderby unsigned MaxBytesToEmit) { 3498067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // TODO: This is exactly the same as WinCOFFStreamer. Consider merging into 3508067adc271d7ccfcd28a238d73942b21a5e2bc62Michael J. Spencer // MCObjectStreamer. 3516e72048add2a6464e038121c6c275da37528aa0aKevin Enderby if (MaxBytesToEmit == 0) 3526e72048add2a6464e038121c6c275da37528aa0aKevin Enderby MaxBytesToEmit = ByteAlignment; 3531c15413ebc8f4a35545a381a789a718627396d03Daniel Dunbar MCAlignFragment *F = new MCAlignFragment(ByteAlignment, 0, 1, MaxBytesToEmit, 35483b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getCurrentSectionData()); 3551c15413ebc8f4a35545a381a789a718627396d03Daniel Dunbar F->setEmitNops(true); 3560705fbf52fcaade0c6b9d5d33bec163ee4c2daf4Daniel Dunbar 357f3d2ef0c9712381a105118336975adcfbf733db0Daniel Dunbar // Update the maximum alignment on the current section if necessary. 35883b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar if (ByteAlignment > getCurrentSectionData()->getAlignment()) 35983b467178a8295048f3ee7b44ff9c7ea244a96ccDaniel Dunbar getCurrentSectionData()->setAlignment(ByteAlignment); 360fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 361fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar 3622ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbarvoid MCMachOStreamer::EmitInstToData(const MCInst &Inst) { 3632ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar MCDataFragment *DF = getOrCreateDataFragment(); 3643f4dcd92daef80f87919507b6baf2a97d4bfaa2eDaniel Dunbar 36573c557458c0e28899f37c557bcaf36c2b6701260Daniel Dunbar SmallVector<MCFixup, 4> Fixups; 3664fac74950a1ff08b995b366bfb84369c1507faefDaniel Dunbar SmallString<256> Code; 3674fac74950a1ff08b995b366bfb84369c1507faefDaniel Dunbar raw_svector_ostream VecOS(Code); 3688dc68ab931e0f0a7c5caf9cd341b2ec855733863Daniel Dunbar getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups); 369f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar VecOS.flush(); 370f6346769b344f9b134f0661e8bd2b4245f6490eaDaniel Dunbar 3712ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar // Add the fixups and data. 3722ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar for (unsigned i = 0, e = Fixups.size(); i != e; ++i) { 3732ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size()); 3742ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar DF->addFixup(Fixups[i]); 3752ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar } 3762ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar DF->getContents().append(Code.begin(), Code.end()); 3772ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar} 3782ac0c453b2de1029f35d9ccb933c1ef303be00a2Daniel Dunbar 379c095793b4ab027181605c79c9808df12afe45d63Kevin Enderbyvoid MCMachOStreamer::Finish() { 380a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // We have to set the fragment atom associations so we can relax properly for 381a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // Mach-O. 382a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar 383a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // First, scan the symbol table to build a lookup table from fragments to 384a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // defining symbols. 385a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar DenseMap<const MCFragment*, MCSymbolData*> DefiningSymbolMap; 386a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar for (MCAssembler::symbol_iterator it = getAssembler().symbol_begin(), 387a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar ie = getAssembler().symbol_end(); it != ie; ++it) { 388a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar if (getAssembler().isSymbolLinkerVisible(it->getSymbol()) && 389a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar it->getFragment()) { 390a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // An atom defining symbol should never be internal to a fragment. 391a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar assert(it->getOffset() == 0 && "Invalid offset in atom defining symbol!"); 392a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar DefiningSymbolMap[it->getFragment()] = it; 393a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar } 394a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar } 395a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar 396a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // Set the fragment atom associations by tracking the last seen atom defining 397a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar // symbol. 398a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar for (MCAssembler::iterator it = getAssembler().begin(), 399a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar ie = getAssembler().end(); it != ie; ++it) { 400a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar MCSymbolData *CurrentAtom = 0; 401a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar for (MCSectionData::iterator it2 = it->begin(), 402a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar ie2 = it->end(); it2 != ie2; ++it2) { 403a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar if (MCSymbolData *SD = DefiningSymbolMap.lookup(it2)) 404a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar CurrentAtom = SD; 405a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar it2->setAtom(CurrentAtom); 406a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar } 407a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar } 408a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar 409a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar this->MCObjectStreamer::Finish(); 410a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar} 411a86de1050889b61df2cd42cdc2acc5f9796b7f0cDaniel Dunbar 4121f3e445184e5ca2aa4295c2a77f2a4e0b957fea1Daniel DunbarMCStreamer *llvm::createMachOStreamer(MCContext &Context, TargetAsmBackend &TAB, 413ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar raw_ostream &OS, MCCodeEmitter *CE, 414ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar bool RelaxAll) { 415ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar MCMachOStreamer *S = new MCMachOStreamer(Context, TAB, OS, CE); 416ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar if (RelaxAll) 417ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar S->getAssembler().setRelaxAll(true); 418ac2884a717daf3ad2aa8425320795d661e8a980bDaniel Dunbar return S; 419fb4a6b397665df011348ade24a8e38d2219f095aDaniel Dunbar} 420