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1//===-- WinCFGuard.h - Windows Control Flow Guard Handling ----*- C++ -*--===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file contains support for writing the metadata for Windows Control Flow10// Guard, including address-taken functions, and valid longjmp targets.11//12//===----------------------------------------------------------------------===//13 14#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WINCFGUARD_H15#define LLVM_LIB_CODEGEN_ASMPRINTER_WINCFGUARD_H16 17#include "llvm/CodeGen/AsmPrinterHandler.h"18#include "llvm/Support/Compiler.h"19#include <vector>20 21namespace llvm {22 23class LLVM_LIBRARY_VISIBILITY WinCFGuard : public AsmPrinterHandler {24 /// Target of directive emission.25 AsmPrinter *Asm;26 std::vector<const MCSymbol *> LongjmpTargets;27 MCSymbol *lookupImpSymbol(const MCSymbol *Sym);28 29public:30 WinCFGuard(AsmPrinter *A);31 ~WinCFGuard() override;32 33 /// Emit the Control Flow Guard function ID table.34 void endModule() override;35 36 /// Gather pre-function debug information.37 /// Every beginFunction(MF) call should be followed by an endFunction(MF)38 /// call.39 void beginFunction(const MachineFunction *MF) override {}40 41 /// Gather post-function debug information.42 /// Please note that some AsmPrinter implementations may not call43 /// beginFunction at all.44 void endFunction(const MachineFunction *MF) override;45};46 47} // namespace llvm48 49#endif50