mirror of
https://sourceware.org/git/glibc.git
synced 2025-04-24 21:47:24 +03:00
5a659ccc0e
The kernel is evolving this interface (e.g., removal of the restriction on cross-device copies), and keeping up with that is difficult. Applications which need the function should run kernels which support the system call instead of relying on the imperfect glibc emulation. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
/* Set flags signalling availability of kernel features based on given
|
|
kernel version number.
|
|
Copyright (C) 2006-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include_next <kernel-features.h>
|
|
|
|
/* The ARM kernel before 3.14.3 may or may not support
|
|
futex_atomic_cmpxchg_inatomic, depending on kernel
|
|
configuration. */
|
|
#if __LINUX_KERNEL_VERSION < 0x030E03
|
|
# undef __ASSUME_SET_ROBUST_LIST
|
|
#endif
|
|
|
|
/* ARM fadvise64_64 reorganize the syscall arguments. */
|
|
#define __ASSUME_FADVISE64_64_6ARG 1
|
|
|
|
/* Define this if your 32-bit syscall API requires 64-bit register
|
|
pairs to start with an even-number register. */
|
|
#define __ASSUME_ALIGNED_REGISTER_PAIRS 1
|
|
|
|
/* ARM only has a syscall for fadvise64{_64} and it is defined with a
|
|
non-standard name. */
|
|
#define __NR_fadvise64_64 __NR_arm_fadvise64_64
|
|
|
|
#define __ASSUME_RECV_SYSCALL 1
|
|
#define __ASSUME_SEND_SYSCALL 1
|
|
|
|
/* Support for the mlock2 and copy_file_range syscalls was added to
|
|
the compat syscall table for 64-bit kernels in 4.7, although
|
|
present in 32-bit kernels from 4.4 and 4.5 respectively. */
|
|
#if __LINUX_KERNEL_VERSION < 0x040700
|
|
# undef __ASSUME_MLOCK2
|
|
#endif
|
|
|
|
#undef __ASSUME_CLONE_DEFAULT
|
|
#define __ASSUME_CLONE_BACKWARDS 1
|