| Florian Mayer | e65e193 | 2024-02-15 22:20:54 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2024 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #pragma once |
| 18 | |
| 19 | #if defined(__BIONIC__) && defined(__aarch64__) |
| 20 | |
| 21 | __attribute__((target("mte"))) static bool is_stack_mte_on() { |
| 22 | alignas(16) int x = 0; |
| 23 | void* p = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(&x) + (1UL << 57)); |
| 24 | void* p_cpy = p; |
| 25 | __builtin_arm_stg(p); |
| 26 | p = __builtin_arm_ldg(p); |
| 27 | __builtin_arm_stg(&x); |
| 28 | return p == p_cpy; |
| 29 | } |
| 30 | |
| 31 | #endif |