| // Copyright 2019 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_H_ |
| #define V8_EXECUTION_POINTER_AUTHENTICATION_H_ |
| |
| #include "include/v8.h" |
| #include "src/base/macros.h" |
| #include "src/common/globals.h" |
| #include "src/deoptimizer/deoptimizer.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class PointerAuthentication : public AllStatic { |
| public: |
| // When CFI is enabled, authenticate the address stored in {pc_address} and |
| // return the authenticated address. {offset_from_sp} is the offset between |
| // {pc_address} and the pointer used as a context for signing. |
| // When CFI is not enabled, simply load return address from {pc_address} and |
| // return it. |
| V8_INLINE static Address AuthenticatePC(Address* pc_address, |
| unsigned offset_from_sp); |
| |
| // When CFI is enabled, strip Pointer Authentication Code (PAC) from {pc} and |
| // return the raw value. |
| // When CFI is not enabled, return {pc} unmodified. |
| V8_INLINE static Address StripPAC(Address pc); |
| |
| // When CFI is enabled, authenticate the address stored in {pc_address} and |
| // replace it with {new_pc}, after signing it. {offset_from_sp} is the offset |
| // between {pc_address} and the pointer used as a context for signing. |
| // When CFI is not enabled, store {new_pc} to {pc_address} without signing. |
| V8_INLINE static void ReplacePC(Address* pc_address, Address new_pc, |
| int offset_from_sp); |
| |
| // When CFI is enabled, sign {pc} using {sp}, check the address and return the |
| // signed value. When CFI is not enabled, return {pc} unmodified. This method |
| // only applies in the deoptimizer. |
| V8_INLINE static Address SignAndCheckPC(Address pc, Address sp); |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #ifdef V8_ENABLE_CONTROL_FLOW_INTEGRITY |
| |
| #ifndef V8_TARGET_ARCH_ARM64 |
| #error "V8_ENABLE_CONTROL_FLOW_INTEGRITY should imply V8_TARGET_ARCH_ARM64" |
| #endif |
| #include "src/execution/arm64/pointer-authentication-arm64.h" |
| |
| #else |
| |
| #include "src/execution/pointer-authentication-dummy.h" |
| |
| #endif |
| |
| #endif // V8_EXECUTION_POINTER_AUTHENTICATION_H_ |