| /* |
| * Copyright (c) 2021, Arm Limited. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_CPU_LINUX_AARCH64_PAUTH_LINUX_AARCH64_INLINE_HPP |
| #define OS_CPU_LINUX_AARCH64_PAUTH_LINUX_AARCH64_INLINE_HPP |
| |
| // Only the PAC instructions in the NOP space can be used. This ensures the |
| // binaries work on systems without PAC. Write these instructions using their |
| // alternate "hint" instructions to ensure older compilers can still be used. |
| |
| #define XPACLRI "hint #0x7;" |
| |
| inline address pauth_strip_pointer(address ptr) { |
| register address result __asm__("x30") = ptr; |
| asm (XPACLRI : "+r"(result)); |
| return result; |
| } |
| |
| #undef XPACLRI |
| |
| #endif // OS_CPU_LINUX_AARCH64_PAUTH_LINUX_AARCH64_INLINE_HPP |
