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1 /* Set flags signalling availability of kernel features based on given
2 kernel version number.
3 Copyright (C) 2006-2021 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #include <endian.h>
21 #include_next <kernel-features.h>
22
23 /* The ARM kernel before 3.14.3 may or may not support
24 futex_atomic_cmpxchg_inatomic, depending on kernel
25 configuration. */
26 #if __LINUX_KERNEL_VERSION < 0x030E03
27 # undef __ASSUME_SET_ROBUST_LIST
28 #endif
29
30 /* ARM fadvise64_64 reorganize the syscall arguments. */
31 #define __ASSUME_FADVISE64_64_6ARG 1
32
33 /* Define this if your 32-bit syscall API requires 64-bit register
34 pairs to start with an even-number register. */
35 #define __ASSUME_ALIGNED_REGISTER_PAIRS 1
36
37 /* ARM only has a syscall for fadvise64{_64} and it is defined with a
38 non-standard name. */
39 #define __NR_fadvise64_64 __NR_arm_fadvise64_64
40
41 #define __ASSUME_RECV_SYSCALL 1
42 #define __ASSUME_SEND_SYSCALL 1
43
44 /* Support for the mlock2 and copy_file_range syscalls was added to
45 the compat syscall table for 64-bit kernels in 4.7, although
46 present in 32-bit kernels from 4.4 and 4.5 respectively. */
47 #if __LINUX_KERNEL_VERSION < 0x040700
48 # undef __ASSUME_MLOCK2
49 #endif
50
51 #undef __ASSUME_CLONE_DEFAULT
52 #define __ASSUME_CLONE_BACKWARDS 1
53
54 #if __BYTE_ORDER == __BIG_ENDIAN
55 # define __ASSUME_SYSVIPC_BROKEN_MODE_T
56 #endif
57
58 #undef __ASSUME_SYSVIPC_DEFAULT_IPC_64