sysdeps/unix/sysv/linux/arm/kernel-features.h

   1 /* Set flags signalling availability of kernel features based on given
   2    kernel version number.
   3    Copyright (C) 2006-2019 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_next <kernel-features.h>
  21
  22 /* The ARM kernel before 3.14.3 may or may not support
  23    futex_atomic_cmpxchg_inatomic, depending on kernel
  24    configuration.  */
  25 #if __LINUX_KERNEL_VERSION < 0x030E03
  26 # undef __ASSUME_SET_ROBUST_LIST
  27 #endif
  28
  29 /* ARM fadvise64_64 reorganize the syscall arguments.  */
  30 #define __ASSUME_FADVISE64_64_6ARG      1
  31
  32 /* Define this if your 32-bit syscall API requires 64-bit register
  33    pairs to start with an even-number register.  */
  34 #define __ASSUME_ALIGNED_REGISTER_PAIRS 1
  35
  36 /* ARM only has a syscall for fadvise64{_64} and it is defined with a
  37    non-standard name.  */
  38 #define __NR_fadvise64_64 __NR_arm_fadvise64_64
  39
  40 #define __ASSUME_RECV_SYSCALL   1
  41 #define __ASSUME_SEND_SYSCALL   1
  42
  43 /* Support for the mlock2 and copy_file_range syscalls was added to
  44    the compat syscall table for 64-bit kernels in 4.7, although
  45    present in 32-bit kernels from 4.4 and 4.5 respectively.  */
  46 #if __LINUX_KERNEL_VERSION < 0x040700
  47 # undef __ASSUME_MLOCK2
  48 #endif
  49
  50 #undef __ASSUME_CLONE_DEFAULT
  51 #define __ASSUME_CLONE_BACKWARDS        1