unix: add Readv/Writev family of syscalls for linux

Fixes golang/go#36201

Change-Id: Ie3b197e18bc5d59fd222f3fa0100e1e0a3d11866
Reviewed-on: https://go-review.googlesource.com/c/sys/+/212157
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

unix/mkerrors.sh

@@ -186,6 +186,7 @@ struct ltchars {
 #include <sys/select.h>
 #include <sys/signalfd.h>
 #include <sys/socket.h>
+#include <sys/uio.h>
 #include <sys/xattr.h>
 #include <linux/bpf.h>
 #include <linux/can.h>
@@ -526,6 +527,7 @@ ccflags="$@"
 		$2 ~ /^WDIOC_/ ||
 		$2 ~ /^NFN/ ||
 		$2 ~ /^XDP_/ ||
+		$2 ~ /^RWF_/ ||
 		$2 ~ /^(HDIO|WIN|SMART)_/ ||
 		$2 ~ /^CRYPTO_/ ||
 		$2 ~ /^TIPC_/ ||

unix/syscall_linux.go

@@ -1677,6 +1677,123 @@ func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) {
 //sys	exitThread(code int) (err error) = SYS_EXIT
 //sys	readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ
 //sys	writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE
+//sys	readv(fd int, iovs []Iovec) (n int, err error) = SYS_READV
+//sys	writev(fd int, iovs []Iovec) (n int, err error) = SYS_WRITEV
+//sys	preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PREADV
+//sys	pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PWRITEV
+//sys	preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PREADV2
+//sys	pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PWRITEV2
+
+func bytes2iovec(bs [][]byte) []Iovec {
+	iovecs := make([]Iovec, len(bs))
+	for i, b := range bs {
+		iovecs[i].SetLen(len(b))
+		if len(b) > 0 {
+			iovecs[i].Base = &b[0]
+		} else {
+			iovecs[i].Base = (*byte)(unsafe.Pointer(&_zero))
+		}
+	}
+	return iovecs
+}
+
+// offs2lohi splits offs into its lower and upper unsigned long. On 64-bit
+// systems, hi will always be 0. On 32-bit systems, offs will be split in half.
+// preadv/pwritev chose this calling convention so they don't need to add a
+// padding-register for alignment on ARM.
+func offs2lohi(offs int64) (lo, hi uintptr) {
+	return uintptr(offs), uintptr(uint64(offs) >> SizeofLong)
+}
+
+func Readv(fd int, iovs [][]byte) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	n, err = readv(fd, iovecs)
+	readvRacedetect(iovecs, n, err)
+	return n, err
+}
+
+func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	lo, hi := offs2lohi(offset)
+	n, err = preadv(fd, iovecs, lo, hi)
+	readvRacedetect(iovecs, n, err)
+	return n, err
+}
+
+func Preadv2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	lo, hi := offs2lohi(offset)
+	n, err = preadv2(fd, iovecs, lo, hi, flags)
+	readvRacedetect(iovecs, n, err)
+	return n, err
+}
+
+func readvRacedetect(iovecs []Iovec, n int, err error) {
+	if !raceenabled {
+		return
+	}
+	for i := 0; n > 0 && i < len(iovecs); i++ {
+		m := int(iovecs[i].Len)
+		if m > n {
+			m = n
+		}
+		n -= m
+		if m > 0 {
+			raceWriteRange(unsafe.Pointer(iovecs[i].Base), m)
+		}
+	}
+	if err == nil {
+		raceAcquire(unsafe.Pointer(&ioSync))
+	}
+}
+
+func Writev(fd int, iovs [][]byte) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	if raceenabled {
+		raceReleaseMerge(unsafe.Pointer(&ioSync))
+	}
+	n, err = writev(fd, iovecs)
+	writevRacedetect(iovecs, n)
+	return n, err
+}
+
+func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	if raceenabled {
+		raceReleaseMerge(unsafe.Pointer(&ioSync))
+	}
+	lo, hi := offs2lohi(offset)
+	n, err = pwritev(fd, iovecs, lo, hi)
+	writevRacedetect(iovecs, n)
+	return n, err
+}
+
+func Pwritev2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) {
+	iovecs := bytes2iovec(iovs)
+	if raceenabled {
+		raceReleaseMerge(unsafe.Pointer(&ioSync))
+	}
+	lo, hi := offs2lohi(offset)
+	n, err = pwritev2(fd, iovecs, lo, hi, flags)
+	writevRacedetect(iovecs, n)
+	return n, err
+}
+
+func writevRacedetect(iovecs []Iovec, n int) {
+	if !raceenabled {
+		return
+	}
+	for i := 0; n > 0 && i < len(iovecs); i++ {
+		m := int(iovecs[i].Len)
+		if m > n {
+			m = n
+		}
+		n -= m
+		if m > 0 {
+			raceReadRange(unsafe.Pointer(iovecs[i].Base), m)
+		}
+	}
+}
 
 // mmap varies by architecture; see syscall_linux_*.go.
 //sys	munmap(addr uintptr, length uintptr) (err error)

unix/zerrors_linux_386.go

@@ -2035,6 +2035,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_amd64.go

@@ -2036,6 +2036,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_arm.go

@@ -2042,6 +2042,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_arm64.go

@@ -2028,6 +2028,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_mips.go

@@ -2035,6 +2035,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_mips64.go

@@ -2035,6 +2035,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_mips64le.go

@@ -2035,6 +2035,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_mipsle.go

@@ -2035,6 +2035,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_ppc64.go

@@ -2093,6 +2093,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_ppc64le.go

@@ -2093,6 +2093,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_riscv64.go

@@ -2023,6 +2023,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_s390x.go

@@ -2096,6 +2096,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zerrors_linux_sparc64.go

@@ -2088,6 +2088,13 @@ const (
 	RUSAGE_CHILDREN                             = -0x1
 	RUSAGE_SELF                                 = 0x0
 	RUSAGE_THREAD                               = 0x1
+	RWF_APPEND                                  = 0x10
+	RWF_DSYNC                                   = 0x2
+	RWF_HIPRI                                   = 0x1
+	RWF_NOWAIT                                  = 0x8
+	RWF_SUPPORTED                               = 0x1f
+	RWF_SYNC                                    = 0x4
+	RWF_WRITE_LIFE_NOT_SET                      = 0x0
 	SCM_CREDENTIALS                             = 0x2
 	SCM_RIGHTS                                  = 0x1
 	SCM_TIMESTAMP                               = 0x1d

unix/zsyscall_linux_386.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_amd64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_arm.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_arm64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_mips64le.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_mipsle.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_ppc64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_ppc64le.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_riscv64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_s390x.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {

unix/zsyscall_linux_sparc64.go

@@ -1608,6 +1608,108 @@ func writelen(fd int, p *byte, np int) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func readv(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_READV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func writev(fd int, iovs []Iovec) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_WRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PREADV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(iovs) > 0 {
+		_p0 = unsafe.Pointer(&iovs[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_PWRITEV2, uintptr(fd), uintptr(_p0), uintptr(len(iovs)), uintptr(offs_l), uintptr(offs_h), uintptr(flags))
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
 	if e1 != 0 {