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- /* Restartable Sequences Linux aarch64 architecture header.
- Copyright (C) 2021-2026 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
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