| // Copyright 2020 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_EXECUTION_POINTER_AUTHENTICATION_DUMMY_H_ |
| #define V8_EXECUTION_POINTER_AUTHENTICATION_DUMMY_H_ |
| |
| #include "include/v8-internal.h" |
| #include "src/base/macros.h" |
| #include "src/execution/pointer-authentication.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // Dummy implementation of the PointerAuthentication class methods, to be used |
| // when CFI is not enabled. |
| |
| // Load return address from {pc_address} and return it. |
| V8_INLINE Address PointerAuthentication::AuthenticatePC(Address* pc_address, |
| unsigned) { |
| return *pc_address; |
| } |
| |
| // Return {pc} unmodified. |
| V8_INLINE Address PointerAuthentication::StripPAC(Address pc) { return pc; } |
| |
| // Store {new_pc} to {pc_address} without signing. |
| V8_INLINE void PointerAuthentication::ReplacePC(Address* pc_address, |
| Address new_pc, int) { |
| *pc_address = new_pc; |
| } |
| |
| // Return {pc} unmodified. |
| V8_INLINE Address PointerAuthentication::SignAndCheckPC(Isolate*, Address pc, |
| Address) { |
| return pc; |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_EXECUTION_POINTER_AUTHENTICATION_DUMMY_H_ |