e23250ecb7
The functions are currently always signed/authenticated with zero discriminator. Co-Authored-By: John McCall <rjmccall@apple.com>
100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
//===----- CGPointerAuthInfo.h - -------------------------------*- 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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// Pointer auth info class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_CODEGEN_CGPOINTERAUTHINFO_H
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#define LLVM_CLANG_LIB_CODEGEN_CGPOINTERAUTHINFO_H
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#include "clang/AST/Type.h"
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#include "clang/Basic/LangOptions.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IR/Value.h"
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namespace clang {
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namespace CodeGen {
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class CGPointerAuthInfo {
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private:
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PointerAuthenticationMode AuthenticationMode : 2;
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unsigned IsIsaPointer : 1;
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unsigned AuthenticatesNullValues : 1;
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unsigned Key : 2;
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llvm::Value *Discriminator;
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public:
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CGPointerAuthInfo()
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: AuthenticationMode(PointerAuthenticationMode::None),
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IsIsaPointer(false), AuthenticatesNullValues(false), Key(0),
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Discriminator(nullptr) {}
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CGPointerAuthInfo(unsigned Key, PointerAuthenticationMode AuthenticationMode,
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bool IsIsaPointer, bool AuthenticatesNullValues,
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llvm::Value *Discriminator)
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: AuthenticationMode(AuthenticationMode), IsIsaPointer(IsIsaPointer),
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AuthenticatesNullValues(AuthenticatesNullValues), Key(Key),
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Discriminator(Discriminator) {
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assert(!Discriminator || Discriminator->getType()->isIntegerTy() ||
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Discriminator->getType()->isPointerTy());
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}
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explicit operator bool() const { return isSigned(); }
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bool isSigned() const {
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return AuthenticationMode != PointerAuthenticationMode::None;
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}
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unsigned getKey() const {
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assert(isSigned());
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return Key;
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}
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llvm::Value *getDiscriminator() const {
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assert(isSigned());
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return Discriminator;
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}
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PointerAuthenticationMode getAuthenticationMode() const {
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return AuthenticationMode;
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}
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bool isIsaPointer() const { return IsIsaPointer; }
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bool authenticatesNullValues() const { return AuthenticatesNullValues; }
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bool shouldStrip() const {
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return AuthenticationMode == PointerAuthenticationMode::Strip ||
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AuthenticationMode == PointerAuthenticationMode::SignAndStrip;
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}
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bool shouldSign() const {
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return AuthenticationMode == PointerAuthenticationMode::SignAndStrip ||
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AuthenticationMode == PointerAuthenticationMode::SignAndAuth;
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}
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bool shouldAuth() const {
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return AuthenticationMode == PointerAuthenticationMode::SignAndAuth;
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}
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friend bool operator!=(const CGPointerAuthInfo &LHS,
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const CGPointerAuthInfo &RHS) {
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return LHS.Key != RHS.Key || LHS.Discriminator != RHS.Discriminator ||
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LHS.AuthenticationMode != RHS.AuthenticationMode;
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}
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friend bool operator==(const CGPointerAuthInfo &LHS,
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const CGPointerAuthInfo &RHS) {
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return !(LHS != RHS);
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}
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};
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} // end namespace CodeGen
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} // end namespace clang
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#endif
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