1/* Restartable Sequences Linux x86 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   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