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Summary: A new function pass (Transforms/CFGuard/CFGuard.cpp) inserts CFGuard checks on indirect function calls, using either the check mechanism (X86, ARM, AArch64) or or the dispatch mechanism (X86-64). The check mechanism requires a new calling convention for the supported targets. The dispatch mechanism adds the target as an operand bundle, which is processed by SelectionDAG. Another pass (CodeGen/CFGuardLongjmp.cpp) identifies and emits valid longjmp targets, as required by /guard:cf. This feature is enabled using the `cfguard` CC1 option. Reviewers: thakis, rnk, theraven, pcc Subscribers: ychen, hans, metalcanine, dmajor, tomrittervg, alex, mehdi_amini, mgorny, javed.absar, kristof.beyls, hiraditya, steven_wu, dexonsmith, cfe-commits, llvm-commits Tags: #clang, #llvm Differential Revision: https://reviews.llvm.org/D65761
27 lines
854 B
C++
27 lines
854 B
C++
//===-- CFGuard.h - CFGuard Transformations ---------------------*- 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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// Windows Control Flow Guard passes (/guard:cf).
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//===---------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_CFGUARD_H
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#define LLVM_TRANSFORMS_CFGUARD_H
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namespace llvm {
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class FunctionPass;
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/// Insert Control FLow Guard checks on indirect function calls.
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FunctionPass *createCFGuardCheckPass();
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/// Insert Control FLow Guard dispatches on indirect function calls.
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FunctionPass *createCFGuardDispatchPass();
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} // namespace llvm
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#endif
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