1 // Copyright 2018 The Go Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style

     3 // license that can be found in the LICENSE file.

     4 

     5 // +build arm64,freebsd

     6 

     7 package unix

     8 

     9 import (

    10 	"syscall"

    11 	"unsafe"

    12 )

    13 

    14 func setTimespec(sec, nsec int64) Timespec {

    15 	return Timespec{Sec: sec, Nsec: nsec}

    16 }

    17 

    18 func setTimeval(sec, usec int64) Timeval {

    19 	return Timeval{Sec: sec, Usec: usec}

    20 }

    21 

    22 func SetKevent(k *Kevent_t, fd, mode, flags int) {

    23 	k.Ident = uint64(fd)

    24 	k.Filter = int16(mode)

    25 	k.Flags = uint16(flags)

    26 }

    27 

    28 func (iov *Iovec) SetLen(length int) {

    29 	iov.Len = uint64(length)

    30 }

    31 

    32 func (msghdr *Msghdr) SetControllen(length int) {

    33 	msghdr.Controllen = uint32(length)

    34 }

    35 

    36 func (msghdr *Msghdr) SetIovlen(length int) {

    37 	msghdr.Iovlen = int32(length)

    38 }

    39 

    40 func (cmsg *Cmsghdr) SetLen(length int) {

    41 	cmsg.Len = uint32(length)

    42 }

    43 

    44 func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {

    45 	var writtenOut uint64 = 0

    46 	_, _, e1 := Syscall9(SYS_SENDFILE, uintptr(infd), uintptr(outfd), uintptr(*offset), uintptr(count), 0, uintptr(unsafe.Pointer(&writtenOut)), 0, 0, 0)

    47 

    48 	written = int(writtenOut)

    49 

    50 	if e1 != 0 {

    51 		err = e1

    52 	}

    53 	return

    54 }

    55 

    56 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)

    57 

    58 func PtraceIO(req int, pid int, addr uintptr, out []byte, countin int) (count int, err error) {

    59 	ioDesc := PtraceIoDesc{Op: int32(req), Offs: (*byte)(unsafe.Pointer(addr)), Addr: (*byte)(unsafe.Pointer(&out[0])), Len: uint64(countin)}

    60 	err = ptrace(PTRACE_IO, pid, uintptr(unsafe.Pointer(&ioDesc)), 0)

    61 	return int(ioDesc.Len), err

    62 }