/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include "linux-syscalls.h"

#include <unistd.h>

#include <signal.h>

#include <sys/syscall.h>

#include <sys/types.h>

#include <errno.h>

#if defined(__arm__)

# if defined(__thumb__) || defined(__ARM_EABI__)

#  define UV_SYSCALL_BASE 0

# else

#  define UV_SYSCALL_BASE 0x900000

# endif

#endif /* __arm__ */

#ifndef __NR_recvmmsg

# if defined(__x86_64__)

#  define __NR_recvmmsg 299

# elif defined(__arm__)

#  define __NR_recvmmsg (UV_SYSCALL_BASE + 365)

# endif

#endif /* __NR_recvmsg */

#ifndef __NR_sendmmsg

# if defined(__x86_64__)

#  define __NR_sendmmsg 307

# elif defined(__arm__)

#  define __NR_sendmmsg (UV_SYSCALL_BASE + 374)

# endif

#endif /* __NR_sendmmsg */

#ifndef __NR_utimensat

# if defined(__x86_64__)

#  define __NR_utimensat 280

# elif defined(__i386__)

#  define __NR_utimensat 320

# elif defined(__arm__)

#  define __NR_utimensat (UV_SYSCALL_BASE + 348)

# endif

#endif /* __NR_utimensat */

#ifndef __NR_preadv

# if defined(__x86_64__)

#  define __NR_preadv 295

# elif defined(__i386__)

#  define __NR_preadv 333

# elif defined(__arm__)

#  define __NR_preadv (UV_SYSCALL_BASE + 361)

# endif

#endif /* __NR_preadv */

#ifndef __NR_pwritev

# if defined(__x86_64__)

#  define __NR_pwritev 296

# elif defined(__i386__)

#  define __NR_pwritev 334

# elif defined(__arm__)

#  define __NR_pwritev (UV_SYSCALL_BASE + 362)

# endif

#endif /* __NR_pwritev */

#ifndef __NR_dup3

# if defined(__x86_64__)

#  define __NR_dup3 292

# elif defined(__i386__)

#  define __NR_dup3 330

# elif defined(__arm__)

#  define __NR_dup3 (UV_SYSCALL_BASE + 358)

# endif

#endif /* __NR_pwritev */

#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 (UV_SYSCALL_BASE + 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

# endif

#endif /* __NR_copy_file_range */

#ifndef __NR_statx

# if defined(__x86_64__)

#  define __NR_statx 332

# elif defined(__i386__)

#  define __NR_statx 383

# elif defined(__aarch64__)

#  define __NR_statx 397

# elif defined(__arm__)

#  define __NR_statx (UV_SYSCALL_BASE + 397)

# elif defined(__ppc__)

#  define __NR_statx 383

# elif defined(__s390__)

#  define __NR_statx 379

# endif

#endif /* __NR_statx */

#ifndef __NR_getrandom

# if defined(__x86_64__)

#  define __NR_getrandom 318

# elif defined(__i386__)

#  define __NR_getrandom 355

# elif defined(__aarch64__)

#  define __NR_getrandom 384

# elif defined(__arm__)

#  define __NR_getrandom (UV_SYSCALL_BASE + 384)

# elif defined(__ppc__)

#  define __NR_getrandom 359

# elif defined(__s390__)

#  define __NR_getrandom 349

# endif

#endif /* __NR_getrandom */

struct uv__mmsghdr;

int uv__sendmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {

#if defined(__i386__)

  unsigned long args[4];

  int rc;

  args[0] = (unsigned long) fd;

  args[1] = (unsigned long) mmsg;

  args[2] = (unsigned long) vlen;

  args[3] = /* flags */ 0;

  /* socketcall() raises EINVAL when SYS_SENDMMSG is not supported. */

  rc = syscall(/* __NR_socketcall */ 102, 20 /* SYS_SENDMMSG */, args);

  if (rc == -1)

    if (errno == EINVAL)

      errno = ENOSYS;

  return rc;

#elif defined(__NR_sendmmsg)

  return syscall(__NR_sendmmsg, fd, mmsg, vlen, /* flags */ 0);

#else

  return errno = ENOSYS, -1;

#endif

}

int uv__recvmmsg(int fd, struct uv__mmsghdr* mmsg, unsigned int vlen) {

#if defined(__i386__)

  unsigned long args[5];

  int rc;

  args[0] = (unsigned long) fd;

  args[1] = (unsigned long) mmsg;

  args[2] = (unsigned long) vlen;

  args[3] = /* flags */ 0;

  args[4] = /* timeout */ 0;

  /* socketcall() raises EINVAL when SYS_RECVMMSG is not supported. */

  rc = syscall(/* __NR_socketcall */ 102, 19 /* SYS_RECVMMSG */, args);

  if (rc == -1)

    if (errno == EINVAL)

      errno = ENOSYS;

  return rc;

#elif defined(__NR_recvmmsg)

  return syscall(__NR_recvmmsg, fd, mmsg, vlen, /* flags */ 0, /* timeout */ 0);

#else

  return errno = ENOSYS, -1;

#endif

}

ssize_t uv__preadv(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {

#if defined(__NR_preadv)

  return syscall(__NR_preadv, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));

#else

  return errno = ENOSYS, -1;

#endif

}

ssize_t uv__pwritev(int fd, const struct iovec *iov, int iovcnt, int64_t offset) {

#if defined(__NR_pwritev)

  return syscall(__NR_pwritev, fd, iov, iovcnt, (long)offset, (long)(offset >> 32));

#else

  return errno = ENOSYS, -1;

#endif

}

int uv__dup3(int oldfd, int newfd, int flags) {

#if defined(__NR_dup3)

  return syscall(__NR_dup3, oldfd, newfd, flags);

#else

  return errno = ENOSYS, -1;

#endif

}

ssize_t

uv__fs_copy_file_range(int fd_in,

                       ssize_t* off_in,

                       int fd_out,

                       ssize_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

  return errno = ENOSYS, -1;

#endif

}

int uv__statx(int dirfd,

              const char* path,

              int flags,

              unsigned int mask,

              struct uv__statx* statxbuf) {

  /* __NR_statx make Android box killed by SIGSYS.

   * That looks like a seccomp2 sandbox filter rejecting the system call.

   */

#if defined(__NR_statx) && !defined(__ANDROID__)

  return syscall(__NR_statx, dirfd, path, flags, mask, statxbuf);

#else

  return errno = ENOSYS, -1;

#endif

}

ssize_t uv__getrandom(void* buf, size_t buflen, unsigned flags) {

#if defined(__NR_getrandom)

  return syscall(__NR_getrandom, buf, buflen, flags);

#else

  return errno = ENOSYS, -1;

#endif

}