text: /* 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
  }
  