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1 | /* System-specific settings for dynamic linker code. i386 version. |
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2 | Copyright (C) 2002-2022 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__ |
31 | extern 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 */ |
47 |
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