+ if (Subtarget->isTargetWindows() && !Subtarget->isTargetCygMing() &&
+ MMI->usesVAFloatArgument()) {
+ StringRef SymbolName = Subtarget->is64Bit() ? "_fltused" : "__fltused";
+ MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
+ OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
+ }
+
+ if (Subtarget->isTargetCOFF() && !Subtarget->isTargetEnvMacho()) {
+ X86COFFMachineModuleInfo &COFFMMI =
+ MMI->getObjFileInfo<X86COFFMachineModuleInfo>();
+
+ // Emit type information for external functions
+ typedef X86COFFMachineModuleInfo::externals_iterator externals_iterator;
+ for (externals_iterator I = COFFMMI.externals_begin(),
+ E = COFFMMI.externals_end();
+ I != E; ++I) {
+ OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
+ OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_EXTERNAL);
+ OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
+ << COFF::SCT_COMPLEX_TYPE_SHIFT);
+ OutStreamer.EndCOFFSymbolDef();
+ }
+
+ // Necessary for dllexport support
+ std::vector<const MCSymbol*> DLLExportedFns, DLLExportedGlobals;
+
+ const TargetLoweringObjectFileCOFF &TLOFCOFF =
+ static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
+
+ for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
+ if (I->hasDLLExportLinkage())
+ DLLExportedFns.push_back(Mang->getSymbol(I));
+
+ for (Module::const_global_iterator I = M.global_begin(),
+ E = M.global_end(); I != E; ++I)
+ if (I->hasDLLExportLinkage())
+ DLLExportedGlobals.push_back(Mang->getSymbol(I));
+
+ // Output linker support code for dllexported globals on windows.
+ if (!DLLExportedGlobals.empty() || !DLLExportedFns.empty()) {
+ OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
+ SmallString<128> name;
+ for (unsigned i = 0, e = DLLExportedGlobals.size(); i != e; ++i) {
+ if (Subtarget->isTargetWindows())
+ name = " /EXPORT:";
+ else
+ name = " -export:";
+ name += DLLExportedGlobals[i]->getName();
+ if (Subtarget->isTargetWindows())
+ name += ",DATA";
+ else
+ name += ",data";
+ OutStreamer.EmitBytes(name, 0);
+ }
+
+ for (unsigned i = 0, e = DLLExportedFns.size(); i != e; ++i) {
+ if (Subtarget->isTargetWindows())
+ name = " /EXPORT:";
+ else
+ name = " -export:";
+ name += DLLExportedFns[i]->getName();
+ OutStreamer.EmitBytes(name, 0);
+ }
+ }
+ }
+
+ if (Subtarget->isTargetELF()) {
+ const TargetLoweringObjectFileELF &TLOFELF =
+ static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
+
+ MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
+
+ // Output stubs for external and common global variables.
+ MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
+ if (!Stubs.empty()) {
+ OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
+ const TargetData *TD = TM.getTargetData();
+
+ for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+ OutStreamer.EmitLabel(Stubs[i].first);
+ OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
+ TD->getPointerSize(), 0);
+ }
+ Stubs.clear();
+ }
+ }