1/* System-specific settings for dynamic linker code. i386 version.
2 Copyright (C) 2002-2026 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _LINUX_I386_DL_SYSDEP_H
20
21#include_next <dl-sysdep.h>
22
23/* Traditionally system calls have been made using int $0x80. A
24 second method was introduced which, if possible, will use the
25 sysenter/syscall instructions. To signal the presence and where to
26 find the code the kernel passes an AT_SYSINFO value in the
27 auxiliary vector to the application. */
28#define NEED_DL_SYSINFO 1
29
30#ifndef __ASSEMBLER__
31extern void _dl_sysinfo_int80 (void) attribute_hidden;
32# define DL_SYSINFO_DEFAULT (uintptr_t) _dl_sysinfo_int80
33# define DL_SYSINFO_IMPLEMENTATION \
34 asm (".text\n\t" \
35 ".type _dl_sysinfo_int80,@function\n\t" \
36 ".hidden _dl_sysinfo_int80\n" \
37 CFI_STARTPROC "\n" \
38 "_dl_sysinfo_int80:\n\t" \
39 "int $0x80;\n\t" \
40 "ret;\n\t" \
41 CFI_ENDPROC "\n" \
42 ".size _dl_sysinfo_int80,.-_dl_sysinfo_int80\n\t" \
43 ".previous");
44#endif
45
46#endif /* dl-sysdep.h */