/***

  This file was originally part of systemd.

  Copyright 2010 Lennart Poettering

  Copyright 2016 Zbigniew Jędrzejewski-Szmek

  systemd 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.

  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.

***/

/* Missing glibc definitions to access certain kernel APIs.

   This file is last updated from systemd git:

   commit 71e5200f94b22589922704aa4abdf95d4fe2e528

   Author:     Daniel Mack <daniel@zonque.org>

   AuthorDate: Tue Oct 18 17:57:10 2016 +0200

   Commit:     Lennart Poettering <lennart@poettering.net>

   CommitDate: Fri Sep 22 15:24:54 2017 +0200

   Add abstraction model for BPF programs

*/

#include "config.h"

#if !HAVE_DECL_RENAMEAT2

#  ifndef __NR_renameat2

#    if defined __x86_64__

#      define __NR_renameat2 316

#    elif defined __arm__

#      define __NR_renameat2 382

#    elif defined __aarch64__

#      define __NR_renameat2 276

#    elif defined _MIPS_SIM

#      if _MIPS_SIM == _MIPS_SIM_ABI32

#        define __NR_renameat2 4351

#      endif

#      if _MIPS_SIM == _MIPS_SIM_NABI32

#        define __NR_renameat2 6315

#      endif

#      if _MIPS_SIM == _MIPS_SIM_ABI64

#        define __NR_renameat2 5311

#      endif

#    elif defined __i386__

#      define __NR_renameat2 353

#    elif defined __powerpc64__

#      define __NR_renameat2 357

#    elif defined __s390__ || defined __s390x__

#      define __NR_renameat2 347

#    elif defined __arc__

#      define __NR_renameat2 276

#    else

#      warning "__NR_renameat2 unknown for your architecture"

#    endif

#  endif

static inline int renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) {

#  ifdef __NR_renameat2

        return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags);

#  else

        errno = ENOSYS;

        return -1;

#  endif

}

#endif

#if !HAVE_DECL_MEMFD_CREATE

#  ifndef __NR_memfd_create

#    if defined __x86_64__

#      define __NR_memfd_create 319

#    elif defined __arm__

#      define __NR_memfd_create 385

#    elif defined __aarch64__

#      define __NR_memfd_create 279

#    elif defined __s390__

#      define __NR_memfd_create 350

#    elif defined _MIPS_SIM

#      if _MIPS_SIM == _MIPS_SIM_ABI32

#        define __NR_memfd_create 4354

#      endif

#      if _MIPS_SIM == _MIPS_SIM_NABI32

#        define __NR_memfd_create 6318

#      endif

#      if _MIPS_SIM == _MIPS_SIM_ABI64

#        define __NR_memfd_create 5314

#      endif

#    elif defined __i386__

#      define __NR_memfd_create 356

#    elif defined __arc__

#      define __NR_memfd_create 279

#    else

#      warning "__NR_memfd_create unknown for your architecture"

#    endif

#  endif

static inline int memfd_create(const char *name, unsigned int flags) {

#  ifdef __NR_memfd_create

        return syscall(__NR_memfd_create, name, flags);

#  else

        errno = ENOSYS;

        return -1;

#  endif

}

#endif

/* Copied from systemd git:

   commit 6bda23dd6aaba50cf8e3e6024248cf736cc443ca

   Author:     Yu Watanabe <watanabe.yu+github@gmail.com>

   AuthorDate: Thu Jul 27 20:22:54 2017 +0900

   Commit:     Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>

   CommitDate: Thu Jul 27 07:22:54 2017 -0400

*/

#if !HAVE_DECL_COPY_FILE_RANGE

#  ifndef __NR_copy_file_range

#    if defined(__x86_64__)

#      define __NR_copy_file_range 326

#    elif defined(__i386__)

#      define __NR_copy_file_range 377

#    elif defined __s390__

#      define __NR_copy_file_range 375

#    elif defined __arm__

#      define __NR_copy_file_range 391

#    elif defined __aarch64__

#      define __NR_copy_file_range 285

#    elif defined __powerpc__

#      define __NR_copy_file_range 379

#    elif defined __arc__

#      define __NR_copy_file_range 285

#    else

#      warning "__NR_copy_file_range not defined for your architecture"

#    endif

#  endif

static inline ssize_t missing_copy_file_range(int fd_in, loff_t *off_in,

                                              int fd_out, loff_t *off_out,

                                              size_t len,

                                              unsigned int flags) {

#  ifdef __NR_copy_file_range

        return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);

#  else

        errno = ENOSYS;

        return -1;

#  endif

}

#  define copy_file_range missing_copy_file_range

#endif