1/* System-specific settings for dynamic linker code.  i386 version.
 2   Copyright (C) 2002-2025 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 */