1 /* Restartable Sequences Linux x86 architecture header. 2 Copyright (C) 2021-2022 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 RSEQ_SIG is used with the following reserved undefined instructions, which 25 trap in user-space: 26 27 x86-32: 0f b9 3d 53 30 05 53 ud1 0x53053053,%edi 28 x86-64: 0f b9 3d 53 30 05 53 ud1 0x53053053(%rip),%edi */ 29 30 #define RSEQ_SIG 0x53053053 31