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44 lines
1.4 KiB
C++
44 lines
1.4 KiB
C++
//===-- CodeGen/AsmPrinter/WinCFGuard.cpp - Control Flow Guard Impl ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing Win64 exception info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#include "WinCFGuard.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/MachineOperand.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCStreamer.h"
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#include <vector>
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using namespace llvm;
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WinCFGuard::WinCFGuard(AsmPrinter *A) : AsmPrinterHandler(), Asm(A) {}
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WinCFGuard::~WinCFGuard() {}
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void WinCFGuard::endModule() {
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const Module *M = Asm->MMI->getModule();
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std::vector<const Function *> Functions;
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for (const Function &F : *M)
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if (F.hasAddressTaken())
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Functions.push_back(&F);
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if (Functions.empty())
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return;
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auto &OS = *Asm->OutStreamer;
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OS.SwitchSection(Asm->OutContext.getObjectFileInfo()->getGFIDsSection());
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for (const Function *F : Functions)
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OS.EmitCOFFSymbolIndex(Asm->getSymbol(F));
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}
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