[llvm-branch-commits] [clang] [clang] Implement function pointer signing and authenticated function calls (PR #93906)

[Akira Hatanaka via llvm-branch-commits]

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@@ -0,0 +1,96 @@
+//===----- CGPointerAuthInfo.h -  -------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Pointer auth info class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_LIB_CODEGEN_CGPOINTERAUTHINFO_H
+#define LLVM_CLANG_LIB_CODEGEN_CGPOINTERAUTHINFO_H
+
+#include "clang/AST/Type.h"
+#include "llvm/IR/Type.h"
+#include "llvm/IR/Value.h"
+
+namespace clang {
+namespace CodeGen {
+
+class CGPointerAuthInfo {
+private:
+  PointerAuthenticationMode AuthenticationMode : 2;
+  bool IsIsaPointer : 1;
+  bool AuthenticatesNullValues : 1;
+  unsigned Key : 28;
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ahatanak wrote:

Currently we only need 2 bits, but we'll need more when we add support for soft keys. I changed the size to 4 to match the size in `PointerAuthSchema`. 

https://github.com/llvm/llvm-project/pull/93906