rseq.h (1762B) - Raw
1 /* Restartable Sequences Linux aarch64 architecture header. 2 Copyright (C) 2021-2025 Free Software Foundation, Inc. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _SYS_RSEQ_H 19 # error "Never use <bits/rseq.h> directly; include <sys/rseq.h> instead." 20 #endif 21 22 /* RSEQ_SIG is a signature required before each abort handler code. 23 24 It is a 32-bit value that maps to actual architecture code compiled 25 into applications and libraries. It needs to be defined for each 26 architecture. When choosing this value, it needs to be taken into 27 account that generating invalid instructions may have ill effects on 28 tools like objdump, and may also have impact on the CPU speculative 29 execution efficiency in some cases. 30 31 aarch64 -mbig-endian generates mixed endianness code vs data: 32 little-endian code and big-endian data. Ensure the RSEQ_SIG signature 33 matches code endianness. */ 34 35 #define RSEQ_SIG_CODE 0xd428bc00 /* BRK #0x45E0. */ 36 37 #ifdef __AARCH64EB__ 38 # define RSEQ_SIG_DATA 0x00bc28d4 /* BRK #0x45E0. */ 39 #else 40 # define RSEQ_SIG_DATA RSEQ_SIG_CODE 41 #endif 42 43 #define RSEQ_SIG RSEQ_SIG_DATA