1  /* Set flags signalling availability of kernel features based on given
       2     kernel version number.
       3     Copyright (C) 2006-2023 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