1/* Restartable Sequences Linux x86 architecture header.
2 Copyright (C) 2021-2024 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