1*0b57cec5SDimitry Andric //===-- CodeGen/AsmPrinter/WinCFGuard.cpp - Control Flow Guard Impl ------===// 2*0b57cec5SDimitry Andric // 3*0b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*0b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*0b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*0b57cec5SDimitry Andric // 7*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 8*0b57cec5SDimitry Andric // 9*0b57cec5SDimitry Andric // This file contains support for writing Win64 exception info into asm files. 10*0b57cec5SDimitry Andric // 11*0b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 12*0b57cec5SDimitry Andric 13*0b57cec5SDimitry Andric #include "WinCFGuard.h" 14*0b57cec5SDimitry Andric #include "llvm/CodeGen/AsmPrinter.h" 15*0b57cec5SDimitry Andric #include "llvm/CodeGen/MachineFunction.h" 16*0b57cec5SDimitry Andric #include "llvm/CodeGen/MachineModuleInfo.h" 17*0b57cec5SDimitry Andric #include "llvm/CodeGen/MachineOperand.h" 18*0b57cec5SDimitry Andric #include "llvm/IR/Constants.h" 19*0b57cec5SDimitry Andric #include "llvm/IR/Metadata.h" 20*0b57cec5SDimitry Andric #include "llvm/MC/MCAsmInfo.h" 21*0b57cec5SDimitry Andric #include "llvm/MC/MCObjectFileInfo.h" 22*0b57cec5SDimitry Andric #include "llvm/MC/MCStreamer.h" 23*0b57cec5SDimitry Andric 24*0b57cec5SDimitry Andric #include <vector> 25*0b57cec5SDimitry Andric 26*0b57cec5SDimitry Andric using namespace llvm; 27*0b57cec5SDimitry Andric 28*0b57cec5SDimitry Andric WinCFGuard::WinCFGuard(AsmPrinter *A) : AsmPrinterHandler(), Asm(A) {} 29*0b57cec5SDimitry Andric 30*0b57cec5SDimitry Andric WinCFGuard::~WinCFGuard() {} 31*0b57cec5SDimitry Andric 32*0b57cec5SDimitry Andric void WinCFGuard::endModule() { 33*0b57cec5SDimitry Andric const Module *M = Asm->MMI->getModule(); 34*0b57cec5SDimitry Andric std::vector<const Function *> Functions; 35*0b57cec5SDimitry Andric for (const Function &F : *M) 36*0b57cec5SDimitry Andric if (F.hasAddressTaken()) 37*0b57cec5SDimitry Andric Functions.push_back(&F); 38*0b57cec5SDimitry Andric if (Functions.empty()) 39*0b57cec5SDimitry Andric return; 40*0b57cec5SDimitry Andric auto &OS = *Asm->OutStreamer; 41*0b57cec5SDimitry Andric OS.SwitchSection(Asm->OutContext.getObjectFileInfo()->getGFIDsSection()); 42*0b57cec5SDimitry Andric for (const Function *F : Functions) 43*0b57cec5SDimitry Andric OS.EmitCOFFSymbolIndex(Asm->getSymbol(F)); 44*0b57cec5SDimitry Andric } 45