diff --git a/api/except.txt b/api/except.txt
index f8cd0fa..ea4fa0e 100644
--- a/api/except.txt
+++ b/api/except.txt
@@ -15,25 +15,30 @@
 pkg syscall (freebsd-386), const AF_MAX = 38
 pkg syscall (freebsd-386), const DLT_MATCHING_MAX = 242
 pkg syscall (freebsd-386), const ELAST = 94
+pkg syscall (freebsd-386), const ImplementsGetwd = false
 pkg syscall (freebsd-386), const O_CLOEXEC = 0
 pkg syscall (freebsd-386), func Fchflags(string, int) error
 pkg syscall (freebsd-386-cgo), const AF_MAX = 38
 pkg syscall (freebsd-386-cgo), const DLT_MATCHING_MAX = 242
 pkg syscall (freebsd-386-cgo), const ELAST = 94
+pkg syscall (freebsd-386-cgo), const ImplementsGetwd = false
 pkg syscall (freebsd-386-cgo), const O_CLOEXEC = 0
 pkg syscall (freebsd-amd64), const AF_MAX = 38
 pkg syscall (freebsd-amd64), const DLT_MATCHING_MAX = 242
 pkg syscall (freebsd-amd64), const ELAST = 94
+pkg syscall (freebsd-amd64), const ImplementsGetwd = false
 pkg syscall (freebsd-amd64), const O_CLOEXEC = 0
 pkg syscall (freebsd-amd64), func Fchflags(string, int) error
 pkg syscall (freebsd-amd64-cgo), const AF_MAX = 38
 pkg syscall (freebsd-amd64-cgo), const DLT_MATCHING_MAX = 242
 pkg syscall (freebsd-amd64-cgo), const ELAST = 94
+pkg syscall (freebsd-amd64-cgo), const ImplementsGetwd = false
 pkg syscall (freebsd-amd64-cgo), const O_CLOEXEC = 0
 pkg syscall (freebsd-arm), const AF_MAX = 38
 pkg syscall (freebsd-arm), const BIOCGRTIMEOUT = 1074545262
 pkg syscall (freebsd-arm), const BIOCSRTIMEOUT = 2148287085
 pkg syscall (freebsd-arm), const ELAST = 94
+pkg syscall (freebsd-arm), const ImplementsGetwd = false
 pkg syscall (freebsd-arm), const O_CLOEXEC = 0
 pkg syscall (freebsd-arm), const SIOCAIFADDR = 2151967019
 pkg syscall (freebsd-arm), const SIOCGIFSTATUS = 3274991931
@@ -65,6 +70,7 @@
 pkg syscall (freebsd-arm-cgo), const BIOCGRTIMEOUT = 1074545262
 pkg syscall (freebsd-arm-cgo), const BIOCSRTIMEOUT = 2148287085
 pkg syscall (freebsd-arm-cgo), const ELAST = 94
+pkg syscall (freebsd-arm-cgo), const ImplementsGetwd = false
 pkg syscall (freebsd-arm-cgo), const O_CLOEXEC = 0
 pkg syscall (freebsd-arm-cgo), const SIOCAIFADDR = 2151967019
 pkg syscall (freebsd-arm-cgo), const SIOCGIFSTATUS = 3274991931
@@ -98,6 +104,12 @@
 pkg syscall (linux-amd64-cgo), type Cmsghdr struct, X__cmsg_data [0]uint8
 pkg syscall (linux-arm), type Cmsghdr struct, X__cmsg_data [0]uint8
 pkg syscall (linux-arm-cgo), type Cmsghdr struct, X__cmsg_data [0]uint8
+pkg syscall (netbsd-386), const ImplementsGetwd = false
+pkg syscall (netbsd-386-cgo), const ImplementsGetwd = false
+pkg syscall (netbsd-amd64), const ImplementsGetwd = false
+pkg syscall (netbsd-amd64-cgo), const ImplementsGetwd = false
+pkg syscall (netbsd-arm), const ImplementsGetwd = false
+pkg syscall (netbsd-arm-cgo), const ImplementsGetwd = false
 pkg syscall (netbsd-arm), const SizeofIfData = 132
 pkg syscall (netbsd-arm), func Fchflags(string, int) error
 pkg syscall (netbsd-arm), type IfMsghdr struct, Pad_cgo_1 [4]uint8
@@ -106,6 +118,7 @@
 pkg syscall (netbsd-arm-cgo), type IfMsghdr struct, Pad_cgo_1 [4]uint8
 pkg syscall (openbsd-386), const BIOCGRTIMEOUT = 1074283118
 pkg syscall (openbsd-386), const BIOCSRTIMEOUT = 2148024941
+pkg syscall (openbsd-386), const ImplementsGetwd = false
 pkg syscall (openbsd-386), const RTF_FMASK = 63496
 pkg syscall (openbsd-386), const RTM_VERSION = 4
 pkg syscall (openbsd-386), const SIOCBRDGDADDR = 2150132039
@@ -158,6 +171,7 @@
 pkg syscall (openbsd-386), type Timeval struct, Sec int32
 pkg syscall (openbsd-386-cgo), const BIOCGRTIMEOUT = 1074283118
 pkg syscall (openbsd-386-cgo), const BIOCSRTIMEOUT = 2148024941
+pkg syscall (openbsd-386-cgo), const ImplementsGetwd = false
 pkg syscall (openbsd-386-cgo), const RTF_FMASK = 63496
 pkg syscall (openbsd-386-cgo), const RTM_VERSION = 4
 pkg syscall (openbsd-386-cgo), const SIOCBRDGDADDR = 2150132039
@@ -220,6 +234,7 @@
 pkg syscall (openbsd-amd64), const EFER_NXE ideal-int
 pkg syscall (openbsd-amd64), const EFER_SCE = 1
 pkg syscall (openbsd-amd64), const EFER_SCE ideal-int
+pkg syscall (openbsd-amd64), const ImplementsGetwd = false
 pkg syscall (openbsd-amd64), const PMC5_PIPELINE_FLUSH = 21
 pkg syscall (openbsd-amd64), const PMC5_PIPELINE_FLUSH ideal-int
 pkg syscall (openbsd-amd64), const RTF_FMASK = 63496
@@ -282,6 +297,7 @@
 pkg syscall (openbsd-amd64-cgo), const EFER_NXE ideal-int
 pkg syscall (openbsd-amd64-cgo), const EFER_SCE = 1
 pkg syscall (openbsd-amd64-cgo), const EFER_SCE ideal-int
+pkg syscall (openbsd-amd64-cgo), const ImplementsGetwd = false
 pkg syscall (openbsd-amd64-cgo), const PMC5_PIPELINE_FLUSH = 21
 pkg syscall (openbsd-amd64-cgo), const PMC5_PIPELINE_FLUSH ideal-int
 pkg syscall (openbsd-amd64-cgo), const RTF_FMASK = 63496
diff --git a/src/syscall/mkall.sh b/src/syscall/mkall.sh
index 4e68fb2..cd0783e 100755
--- a/src/syscall/mkall.sh
+++ b/src/syscall/mkall.sh
@@ -234,6 +234,12 @@
 	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
 	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
 	;;
+netbsd_arm)
+	mkerrors="$mkerrors -m32"
+	mksyscall="./mksyscall.pl -l32 -netbsd -arm"
+	mksysnum="curl -s 'http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master' | ./mksysnum_netbsd.pl"
+	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
+	;;
 openbsd_386)
 	mkerrors="$mkerrors -m32"
 	mksyscall="./mksyscall.pl -l32 -openbsd"
diff --git a/src/syscall/syscall_dragonfly.go b/src/syscall/syscall_dragonfly.go
index fead9d9..82741e4 100644
--- a/src/syscall/syscall_dragonfly.go
+++ b/src/syscall/syscall_dragonfly.go
@@ -216,6 +216,7 @@
 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
 //sys	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
+//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
 /*
  * Unimplemented
diff --git a/src/syscall/syscall_freebsd.go b/src/syscall/syscall_freebsd.go
index 5fb9655..c7cd6ae 100644
--- a/src/syscall/syscall_freebsd.go
+++ b/src/syscall/syscall_freebsd.go
@@ -220,6 +220,7 @@
 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
 //sys	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
+//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
 /*
  * Unimplemented
diff --git a/src/syscall/syscall_getwd_bsd.go b/src/syscall/syscall_getwd_bsd.go
new file mode 100644
index 0000000..b143679
--- /dev/null
+++ b/src/syscall/syscall_getwd_bsd.go
@@ -0,0 +1,22 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build dragonfly freebsd netbsd openbsd
+
+package syscall
+
+const ImplementsGetwd = true
+
+func Getwd() (string, error) {
+	var buf [pathMax]byte
+	_, err := getcwd(buf[:])
+	if err != nil {
+		return "", err
+	}
+	n := clen(buf[:])
+	if n < 1 {
+		return "", EINVAL
+	}
+	return string(buf[:n]), nil
+}
diff --git a/src/syscall/syscall_netbsd.go b/src/syscall/syscall_netbsd.go
index c645b13..d9eddc1 100644
--- a/src/syscall/syscall_netbsd.go
+++ b/src/syscall/syscall_netbsd.go
@@ -207,6 +207,7 @@
 //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
+//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
 /*
  * Unimplemented
diff --git a/src/syscall/syscall_no_getwd.go b/src/syscall/syscall_no_getwd.go
deleted file mode 100644
index 0080c5c..0000000
--- a/src/syscall/syscall_no_getwd.go
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build dragonfly freebsd netbsd openbsd
-
-package syscall
-
-const ImplementsGetwd = false
-
-func Getwd() (string, error) { return "", ENOTSUP }
diff --git a/src/syscall/syscall_openbsd.go b/src/syscall/syscall_openbsd.go
index a43d88b..ac87441 100644
--- a/src/syscall/syscall_openbsd.go
+++ b/src/syscall/syscall_openbsd.go
@@ -188,6 +188,7 @@
 //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
+//sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
 /*
  * Unimplemented
diff --git a/src/syscall/syscall_solaris.go b/src/syscall/syscall_solaris.go
index 73ac127..425f512 100644
--- a/src/syscall/syscall_solaris.go
+++ b/src/syscall/syscall_solaris.go
@@ -29,15 +29,6 @@
 	raw    RawSockaddrDatalink
 }
 
-func clen(n []byte) int {
-	for i := 0; i < len(n); i++ {
-		if n[i] == 0 {
-			return i
-		}
-	}
-	return len(n)
-}
-
 func direntIno(buf []byte) (uint64, bool) {
 	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
 }
diff --git a/src/syscall/syscall_unix.go b/src/syscall/syscall_unix.go
index 442f558..a634748 100644
--- a/src/syscall/syscall_unix.go
+++ b/src/syscall/syscall_unix.go
@@ -31,6 +31,16 @@
 func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
 
+// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte.
+func clen(n []byte) int {
+	for i := 0; i < len(n); i++ {
+		if n[i] == 0 {
+			return i
+		}
+	}
+	return len(n)
+}
+
 // Mmap manager, for use by operating system-specific implementations.
 
 type mmapper struct {
diff --git a/src/syscall/types_dragonfly.go b/src/syscall/types_dragonfly.go
index 5728d67..0c060d9 100644
--- a/src/syscall/types_dragonfly.go
+++ b/src/syscall/types_dragonfly.go
@@ -125,6 +125,12 @@
 
 type Fsid C.struct_fsid
 
+// File system limits
+
+const (
+	pathMax = C.PATH_MAX
+)
+
 // Sockets
 
 type RawSockaddrInet4 C.struct_sockaddr_in
diff --git a/src/syscall/types_freebsd.go b/src/syscall/types_freebsd.go
index 6f8670a..020045b 100644
--- a/src/syscall/types_freebsd.go
+++ b/src/syscall/types_freebsd.go
@@ -210,6 +210,12 @@
 
 type Fsid C.struct_fsid
 
+// File system limits
+
+const (
+	pathMax = C.PATH_MAX
+)
+
 // Sockets
 
 type RawSockaddrInet4 C.struct_sockaddr_in
diff --git a/src/syscall/types_netbsd.go b/src/syscall/types_netbsd.go
index 37c5fa9..c349756 100644
--- a/src/syscall/types_netbsd.go
+++ b/src/syscall/types_netbsd.go
@@ -110,6 +110,12 @@
 
 type Fsid C.fsid_t
 
+// File system limits
+
+const (
+	pathMax = C.PATH_MAX
+)
+
 // Sockets
 
 type RawSockaddrInet4 C.struct_sockaddr_in
diff --git a/src/syscall/types_openbsd.go b/src/syscall/types_openbsd.go
index 29d6feb..93456c3 100644
--- a/src/syscall/types_openbsd.go
+++ b/src/syscall/types_openbsd.go
@@ -126,6 +126,12 @@
 
 type Fsid C.fsid_t
 
+// File system limits
+
+const (
+	pathMax = C.PATH_MAX
+)
+
 // Sockets
 
 type RawSockaddrInet4 C.struct_sockaddr_in
diff --git a/src/syscall/zsyscall_dragonfly_amd64.go b/src/syscall/zsyscall_dragonfly_amd64.go
index 5eca951..6154acf 100644
--- a/src/syscall/zsyscall_dragonfly_amd64.go
+++ b/src/syscall/zsyscall_dragonfly_amd64.go
@@ -1306,3 +1306,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_freebsd_386.go b/src/syscall/zsyscall_freebsd_386.go
index 4ada995..81bc754d 100644
--- a/src/syscall/zsyscall_freebsd_386.go
+++ b/src/syscall/zsyscall_freebsd_386.go
@@ -1304,3 +1304,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_freebsd_amd64.go b/src/syscall/zsyscall_freebsd_amd64.go
index 5bbc5c4..1061bb4 100644
--- a/src/syscall/zsyscall_freebsd_amd64.go
+++ b/src/syscall/zsyscall_freebsd_amd64.go
@@ -1304,3 +1304,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_freebsd_arm.go b/src/syscall/zsyscall_freebsd_arm.go
index 011ac0e..1cec7f8 100644
--- a/src/syscall/zsyscall_freebsd_arm.go
+++ b/src/syscall/zsyscall_freebsd_arm.go
@@ -1304,3 +1304,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_netbsd_386.go b/src/syscall/zsyscall_netbsd_386.go
index b6313d5..9102465 100644
--- a/src/syscall/zsyscall_netbsd_386.go
+++ b/src/syscall/zsyscall_netbsd_386.go
@@ -1232,3 +1232,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_netbsd_amd64.go b/src/syscall/zsyscall_netbsd_amd64.go
index 3455828e..f4a46c1 100644
--- a/src/syscall/zsyscall_netbsd_amd64.go
+++ b/src/syscall/zsyscall_netbsd_amd64.go
@@ -1232,3 +1232,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_netbsd_arm.go b/src/syscall/zsyscall_netbsd_arm.go
index 438cfdb..b07e777 100644
--- a/src/syscall/zsyscall_netbsd_arm.go
+++ b/src/syscall/zsyscall_netbsd_arm.go
@@ -1232,3 +1232,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_openbsd_386.go b/src/syscall/zsyscall_openbsd_386.go
index af97f3a..3a46b94 100644
--- a/src/syscall/zsyscall_openbsd_386.go
+++ b/src/syscall/zsyscall_openbsd_386.go
@@ -1270,3 +1270,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_openbsd_amd64.go b/src/syscall/zsyscall_openbsd_amd64.go
index 728ad6b..6bca251 100644
--- a/src/syscall/zsyscall_openbsd_amd64.go
+++ b/src/syscall/zsyscall_openbsd_amd64.go
@@ -1270,3 +1270,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/zsyscall_openbsd_arm.go b/src/syscall/zsyscall_openbsd_arm.go
index 9998a83..4ce317c 100644
--- a/src/syscall/zsyscall_openbsd_arm.go
+++ b/src/syscall/zsyscall_openbsd_arm.go
@@ -1270,3 +1270,20 @@
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func getcwd(buf []byte) (n int, err error) {
+	var _p0 unsafe.Pointer
+	if len(buf) > 0 {
+		_p0 = unsafe.Pointer(&buf[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS___GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
+	n = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
diff --git a/src/syscall/ztypes_dragonfly_amd64.go b/src/syscall/ztypes_dragonfly_amd64.go
index dbbd29a..1cb8608 100644
--- a/src/syscall/ztypes_dragonfly_amd64.go
+++ b/src/syscall/ztypes_dragonfly_amd64.go
@@ -143,6 +143,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_freebsd_386.go b/src/syscall/ztypes_freebsd_386.go
index c23bacf..c9c58f9 100644
--- a/src/syscall/ztypes_freebsd_386.go
+++ b/src/syscall/ztypes_freebsd_386.go
@@ -140,6 +140,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_freebsd_amd64.go b/src/syscall/ztypes_freebsd_amd64.go
index 1e5822f..847527c 100644
--- a/src/syscall/ztypes_freebsd_amd64.go
+++ b/src/syscall/ztypes_freebsd_amd64.go
@@ -140,6 +140,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_freebsd_arm.go b/src/syscall/ztypes_freebsd_arm.go
index f65a929..83108dd 100644
--- a/src/syscall/ztypes_freebsd_arm.go
+++ b/src/syscall/ztypes_freebsd_arm.go
@@ -142,6 +142,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_netbsd_386.go b/src/syscall/ztypes_netbsd_386.go
index c8afb98..009c55d 100644
--- a/src/syscall/ztypes_netbsd_386.go
+++ b/src/syscall/ztypes_netbsd_386.go
@@ -99,6 +99,10 @@
 	X__fsid_val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_netbsd_amd64.go b/src/syscall/ztypes_netbsd_amd64.go
index 9336fc1..f807d98 100644
--- a/src/syscall/ztypes_netbsd_amd64.go
+++ b/src/syscall/ztypes_netbsd_amd64.go
@@ -103,6 +103,10 @@
 	X__fsid_val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_netbsd_arm.go b/src/syscall/ztypes_netbsd_arm.go
index 0e4fe4a..119903f 100644
--- a/src/syscall/ztypes_netbsd_arm.go
+++ b/src/syscall/ztypes_netbsd_arm.go
@@ -104,6 +104,10 @@
 	X__fsid_val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_openbsd_386.go b/src/syscall/ztypes_openbsd_386.go
index 05e79d8..04d5396 100644
--- a/src/syscall/ztypes_openbsd_386.go
+++ b/src/syscall/ztypes_openbsd_386.go
@@ -140,6 +140,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_openbsd_amd64.go b/src/syscall/ztypes_openbsd_amd64.go
index 8bd169c..aad787a 100644
--- a/src/syscall/ztypes_openbsd_amd64.go
+++ b/src/syscall/ztypes_openbsd_amd64.go
@@ -142,6 +142,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8
diff --git a/src/syscall/ztypes_openbsd_arm.go b/src/syscall/ztypes_openbsd_arm.go
index 0c30259..4383b68 100644
--- a/src/syscall/ztypes_openbsd_arm.go
+++ b/src/syscall/ztypes_openbsd_arm.go
@@ -140,6 +140,10 @@
 	Val [2]int32
 }
 
+const (
+	pathMax = 0x400
+)
+
 type RawSockaddrInet4 struct {
 	Len    uint8
 	Family uint8