void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
if (Subtarget->isTargetEnvMacho())
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+
+ if (Subtarget->isTargetCOFF()) {
+ // Emit an absolute @feat.00 symbol. This appears to be some kind of
+ // compiler features bitfield read by link.exe.
+ if (!Subtarget->is64Bit()) {
+ MCSymbol *S = MMI->getContext().GetOrCreateSymbol(StringRef("@feat.00"));
+ OutStreamer.BeginCOFFSymbolDef(S);
+ OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_STATIC);
+ OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_NULL);
+ OutStreamer.EndCOFFSymbolDef();
+ // According to the PE-COFF spec, the LSB of this value marks the object
+ // for "registered SEH". This means that all SEH handler entry points
+ // must be registered in .sxdata. Use of any unregistered handlers will
+ // cause the process to terminate immediately. LLVM does not know how to
+ // register any SEH handlers, so its object files should be safe.
+ S->setAbsolute();
+ OutStreamer.EmitAssignment(
+ S, MCConstantExpr::Create(int64_t(1), MMI->getContext()));
+ }
+ }
}
}
}
-MachineLocation
-X86AsmPrinter::getDebugValueLocation(const MachineInstr *MI) const {
- MachineLocation Location;
- assert (MI->getNumOperands() == 7 && "Invalid no. of machine operands!");
- // Frame address. Currently handles register +- offset only.
-
- if (MI->getOperand(0).isReg() && MI->getOperand(3).isImm())
- Location.set(MI->getOperand(0).getReg(), MI->getOperand(3).getImm());
- else {
- DEBUG(dbgs() << "DBG_VALUE instruction ignored! " << *MI << "\n");
- }
- return Location;
-}
-
-void X86AsmPrinter::PrintDebugValueComment(const MachineInstr *MI,
- raw_ostream &O) {
- // Only the target-dependent form of DBG_VALUE should get here.
- // Referencing the offset and metadata as NOps-2 and NOps-1 is
- // probably portable to other targets; frame pointer location is not.
- unsigned NOps = MI->getNumOperands();
- assert(NOps==7);
- O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
- // cast away const; DIetc do not take const operands for some reason.
- DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
- if (V.getContext().isSubprogram())
- O << DISubprogram(V.getContext()).getDisplayName() << ":";
- O << V.getName();
- O << " <- ";
- // Frame address. Currently handles register +- offset only.
- O << '[';
- if (MI->getOperand(0).isReg() && MI->getOperand(0).getReg())
- printOperand(MI, 0, O);
- else
- O << "undef";
- O << '+'; printOperand(MI, 3, O);
- O << ']';
- O << "+";
- printOperand(MI, NOps-2, O);
-}
-
-
-
//===----------------------------------------------------------------------===//
// Target Registry Stuff
//===----------------------------------------------------------------------===//