| /* Restartable Sequences Linux aarch64 architecture header. |
| Copyright (C) 2021-2022 Free Software Foundation, Inc. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <https://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_RSEQ_H |
| # error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead." |
| #endif |
| |
| /* RSEQ_SIG is a signature required before each abort handler code. |
| |
| It is a 32-bit value that maps to actual architecture code compiled |
| into applications and libraries. It needs to be defined for each |
| architecture. When choosing this value, it needs to be taken into |
| account that generating invalid instructions may have ill effects on |
| tools like objdump, and may also have impact on the CPU speculative |
| execution efficiency in some cases. |
| |
| aarch64 -mbig-endian generates mixed endianness code vs data: |
| little-endian code and big-endian data. Ensure the RSEQ_SIG signature |
| matches code endianness. */ |
| |
| #define RSEQ_SIG_CODE 0xd428bc00 /* BRK #0x45E0. */ |
| |
| #ifdef __AARCH64EB__ |
| # define RSEQ_SIG_DATA 0x00bc28d4 /* BRK #0x45E0. */ |
| #else |
| # define RSEQ_SIG_DATA RSEQ_SIG_CODE |
| #endif |
| |
| #define RSEQ_SIG RSEQ_SIG_DATA |
