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58 lines
1.8 KiB
58 lines
1.8 KiB
4 months ago
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//===-- WinCFGuard.h - Windows Control Flow Guard Handling ----*- C++ -*--===//
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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 the metadata for Windows Control Flow
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// Guard, including address-taken functions, and valid longjmp targets.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WINCFGUARD_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_WINCFGUARD_H
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#include "llvm/CodeGen/AsmPrinterHandler.h"
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#include "llvm/Support/Compiler.h"
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#include <vector>
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namespace llvm {
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class LLVM_LIBRARY_VISIBILITY WinCFGuard : public AsmPrinterHandler {
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/// Target of directive emission.
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AsmPrinter *Asm;
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std::vector<const MCSymbol *> LongjmpTargets;
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MCSymbol *lookupImpSymbol(const MCSymbol *Sym);
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public:
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WinCFGuard(AsmPrinter *A);
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~WinCFGuard() override;
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void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
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/// Emit the Control Flow Guard function ID table.
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void endModule() override;
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/// Gather pre-function debug information.
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/// Every beginFunction(MF) call should be followed by an endFunction(MF)
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/// call.
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void beginFunction(const MachineFunction *MF) override {}
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/// Gather post-function debug information.
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/// Please note that some AsmPrinter implementations may not call
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/// beginFunction at all.
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void endFunction(const MachineFunction *MF) override;
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/// Process beginning of an instruction.
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void beginInstruction(const MachineInstr *MI) override {}
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/// Process end of an instruction.
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void endInstruction() override {}
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};
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} // namespace llvm
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#endif
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