diff --git a/unix/mksyscall.go b/unix/mksyscall.go
index c821aca52..ad2879e74 100644
--- a/unix/mksyscall.go
+++ b/unix/mksyscall.go
@@ -373,7 +373,7 @@ func main() {
 			text += "}\n\n"
 
 			if *libc && !trampolines[libcFn] {
-				// some system calls share a trampoline, like read and readlen.
+				// Some system calls share a trampoline.
 				trampolines[libcFn] = true
 				// Declare assembly trampoline address.
 				text += fmt.Sprintf("var libc_%s_trampoline_addr uintptr\n\n", libcFn)
diff --git a/unix/mksyscall_aix_ppc.go b/unix/mksyscall_aix_ppc.go
index 1fe7d9215..eec7dcd84 100644
--- a/unix/mksyscall_aix_ppc.go
+++ b/unix/mksyscall_aix_ppc.go
@@ -217,7 +217,7 @@ func main() {
 				}
 			}
 
-			if funct != "fcntl" && funct != "FcntlInt" && funct != "readlen" && funct != "writelen" && funct != "ioctlPtr" {
+			if funct != "fcntl" && funct != "FcntlInt" && funct != "ioctlPtr" {
 				if sysname == "select" {
 					// select is a keyword of Go. Its name is
 					// changed to c_select.
@@ -296,9 +296,7 @@ func main() {
 				} else if p.Type == "unsafe.Pointer" {
 					args = append(args, fmt.Sprintf("C.uintptr_t(uintptr(%s))", p.Name))
 				} else if p.Type == "int" {
-					if (argN == 2) && ((funct == "readlen") || (funct == "writelen")) {
-						args = append(args, fmt.Sprintf("C.size_t(%s)", p.Name))
-					} else if argN == 0 && funct == "fcntl" {
+					if argN == 0 && funct == "fcntl" {
 						args = append(args, fmt.Sprintf("C.uintptr_t(%s)", p.Name))
 					} else if (argN == 2) && ((funct == "fcntl") || (funct == "FcntlInt")) {
 						args = append(args, fmt.Sprintf("C.uintptr_t(%s)", p.Name))
diff --git a/unix/mksyscall_aix_ppc64.go b/unix/mksyscall_aix_ppc64.go
index 31679e6a1..a6598ddc5 100644
--- a/unix/mksyscall_aix_ppc64.go
+++ b/unix/mksyscall_aix_ppc64.go
@@ -189,7 +189,7 @@ func main() {
 			}
 
 			onlyCommon := false
-			if funct == "readlen" || funct == "writelen" || funct == "FcntlInt" || funct == "FcntlFlock" || funct == "ioctlPtr" {
+			if funct == "FcntlInt" || funct == "FcntlFlock" || funct == "ioctlPtr" {
 				// This function call another syscall which is already implemented.
 				// Therefore, the gc and gccgo part must not be generated.
 				onlyCommon = true
diff --git a/unix/syscall_aix.go b/unix/syscall_aix.go
index 9a6e5acac..e94e6cdac 100644
--- a/unix/syscall_aix.go
+++ b/unix/syscall_aix.go
@@ -487,8 +487,6 @@ func Fsync(fd int) error {
 //sys	Unlinkat(dirfd int, path string, flags int) (err error)
 //sys	Ustat(dev int, ubuf *Ustat_t) (err error)
 //sys	write(fd int, p []byte) (n int, err error)
-//sys	readlen(fd int, p *byte, np int) (n int, err error) = read
-//sys	writelen(fd int, p *byte, np int) (n int, err error) = write
 
 //sys	Dup2(oldfd int, newfd int) (err error)
 //sys	Fadvise(fd int, offset int64, length int64, advice int) (err error) = posix_fadvise64
diff --git a/unix/syscall_darwin.go b/unix/syscall_darwin.go
index c69e24f9f..59542a897 100644
--- a/unix/syscall_darwin.go
+++ b/unix/syscall_darwin.go
@@ -644,5 +644,3 @@ func SysctlKinfoProcSlice(name string, args ...int) ([]KinfoProc, error) {
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
 //sys	munmap(addr uintptr, length uintptr) (err error)
-//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
diff --git a/unix/syscall_dragonfly.go b/unix/syscall_dragonfly.go
index 12d76895b..97cb916f2 100644
--- a/unix/syscall_dragonfly.go
+++ b/unix/syscall_dragonfly.go
@@ -343,7 +343,5 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
 //sys	munmap(addr uintptr, length uintptr) (err error)
-//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	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
diff --git a/unix/syscall_freebsd.go b/unix/syscall_freebsd.go
index c26c060a6..64d1bb4db 100644
--- a/unix/syscall_freebsd.go
+++ b/unix/syscall_freebsd.go
@@ -449,7 +449,5 @@ func Dup3(oldfd, newfd, flags int) error {
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
 //sys	munmap(addr uintptr, length uintptr) (err error)
-//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	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index ef2122d39..fb4e50224 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -1979,8 +1979,6 @@ func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) {
 //sys	Unshare(flags int) (err error)
 //sys	write(fd int, p []byte) (n 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
diff --git a/unix/syscall_netbsd.go b/unix/syscall_netbsd.go
index 092eff46b..88162099a 100644
--- a/unix/syscall_netbsd.go
+++ b/unix/syscall_netbsd.go
@@ -356,8 +356,6 @@ func Statvfs(path string, buf *Statvfs_t) (err error) {
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
 //sys	munmap(addr uintptr, length uintptr) (err error)
-//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, flags int) (err error)
 
 const (
diff --git a/unix/syscall_openbsd.go b/unix/syscall_openbsd.go
index 67057c3a4..6f34479b5 100644
--- a/unix/syscall_openbsd.go
+++ b/unix/syscall_openbsd.go
@@ -326,6 +326,4 @@ func Uname(uname *Utsname) error {
 //sys	write(fd int, p []byte) (n int, err error)
 //sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
 //sys	munmap(addr uintptr, length uintptr) (err error)
-//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, flags int) (err error)
diff --git a/unix/syscall_solaris.go b/unix/syscall_solaris.go
index 72d23575f..b99cfa134 100644
--- a/unix/syscall_solaris.go
+++ b/unix/syscall_solaris.go
@@ -698,24 +698,6 @@ func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 //sys	setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) = libsocket.setsockopt
 //sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = libsocket.recvfrom
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procread)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = e1
-	}
-	return
-}
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procwrite)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0)
-	n = int(r0)
-	if e1 != 0 {
-		err = e1
-	}
-	return
-}
-
 // Event Ports
 
 type fileObjCookie struct {
diff --git a/unix/syscall_zos_s390x.go b/unix/syscall_zos_s390x.go
index 44e72edb4..4596d041c 100644
--- a/unix/syscall_zos_s390x.go
+++ b/unix/syscall_zos_s390x.go
@@ -192,7 +192,6 @@ func (cmsg *Cmsghdr) SetLen(length int) {
 
 //sys   fcntl(fd int, cmd int, arg int) (val int, err error)
 //sys	read(fd int, p []byte) (n int, err error)
-//sys   readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
 //sys	write(fd int, p []byte) (n int, err error)
 
 //sys	accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = SYS___ACCEPT_A
diff --git a/unix/zsyscall_aix_ppc.go b/unix/zsyscall_aix_ppc.go
index 9a257219d..d1d1d2331 100644
--- a/unix/zsyscall_aix_ppc.go
+++ b/unix/zsyscall_aix_ppc.go
@@ -817,28 +817,6 @@ func write(fd int, p []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, p *byte, np int) (n int, err error) {
-	r0, er := C.read(C.int(fd), C.uintptr_t(uintptr(unsafe.Pointer(p))), C.size_t(np))
-	n = int(r0)
-	if r0 == -1 && er != nil {
-		err = er
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, p *byte, np int) (n int, err error) {
-	r0, er := C.write(C.int(fd), C.uintptr_t(uintptr(unsafe.Pointer(p))), C.size_t(np))
-	n = int(r0)
-	if r0 == -1 && er != nil {
-		err = er
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Dup2(oldfd int, newfd int) (err error) {
 	r0, er := C.dup2(C.int(oldfd), C.int(newfd))
 	if r0 == -1 && er != nil {
diff --git a/unix/zsyscall_aix_ppc64.go b/unix/zsyscall_aix_ppc64.go
index 6de80c20c..f99a18adc 100644
--- a/unix/zsyscall_aix_ppc64.go
+++ b/unix/zsyscall_aix_ppc64.go
@@ -762,28 +762,6 @@ func write(fd int, p []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, p *byte, np int) (n int, err error) {
-	r0, e1 := callread(fd, uintptr(unsafe.Pointer(p)), np)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, p *byte, np int) (n int, err error) {
-	r0, e1 := callwrite(fd, uintptr(unsafe.Pointer(p)), np)
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Dup2(oldfd int, newfd int) (err error) {
 	_, e1 := calldup2(oldfd, newfd)
 	if e1 != 0 {
diff --git a/unix/zsyscall_darwin_amd64.go b/unix/zsyscall_darwin_amd64.go
index 162d7c932..1cad561e9 100644
--- a/unix/zsyscall_darwin_amd64.go
+++ b/unix/zsyscall_darwin_amd64.go
@@ -2412,28 +2412,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Fstat(fd int, stat *Stat_t) (err error) {
 	_, _, e1 := syscall_syscall(libc_fstat64_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
diff --git a/unix/zsyscall_darwin_arm64.go b/unix/zsyscall_darwin_arm64.go
index 305fe4681..b18edbd0e 100644
--- a/unix/zsyscall_darwin_arm64.go
+++ b/unix/zsyscall_darwin_arm64.go
@@ -2412,28 +2412,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func Fstat(fd int, stat *Stat_t) (err error) {
 	_, _, e1 := syscall_syscall(libc_fstat_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
 	if e1 != 0 {
diff --git a/unix/zsyscall_dragonfly_amd64.go b/unix/zsyscall_dragonfly_amd64.go
index 0eabac7ad..0c67df64a 100644
--- a/unix/zsyscall_dragonfly_amd64.go
+++ b/unix/zsyscall_dragonfly_amd64.go
@@ -1642,28 +1642,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_freebsd_386.go b/unix/zsyscall_freebsd_386.go
index ee313eb00..e6e05d145 100644
--- a/unix/zsyscall_freebsd_386.go
+++ b/unix/zsyscall_freebsd_386.go
@@ -1862,28 +1862,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_freebsd_amd64.go b/unix/zsyscall_freebsd_amd64.go
index 4c986e448..7508accac 100644
--- a/unix/zsyscall_freebsd_amd64.go
+++ b/unix/zsyscall_freebsd_amd64.go
@@ -1862,28 +1862,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_freebsd_arm.go b/unix/zsyscall_freebsd_arm.go
index 555216944..7b56aead4 100644
--- a/unix/zsyscall_freebsd_arm.go
+++ b/unix/zsyscall_freebsd_arm.go
@@ -1862,28 +1862,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_freebsd_arm64.go b/unix/zsyscall_freebsd_arm64.go
index 67a226fbf..cc623dcaa 100644
--- a/unix/zsyscall_freebsd_arm64.go
+++ b/unix/zsyscall_freebsd_arm64.go
@@ -1862,28 +1862,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_freebsd_riscv64.go b/unix/zsyscall_freebsd_riscv64.go
index f0b9ddaaa..581849197 100644
--- a/unix/zsyscall_freebsd_riscv64.go
+++ b/unix/zsyscall_freebsd_riscv64.go
@@ -1862,28 +1862,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) {
 	r0, _, e1 := Syscall6(SYS_ACCEPT4, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
 	nfd = int(r0)
diff --git a/unix/zsyscall_linux.go b/unix/zsyscall_linux.go
index 14ab34a56..1ff3aec74 100644
--- a/unix/zsyscall_linux.go
+++ b/unix/zsyscall_linux.go
@@ -1734,28 +1734,6 @@ func exitThread(code int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, p *byte, np int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(np))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, p *byte, np int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(np))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// 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 {
diff --git a/unix/zsyscall_netbsd_386.go b/unix/zsyscall_netbsd_386.go
index 35f499b32..2df3c5bac 100644
--- a/unix/zsyscall_netbsd_386.go
+++ b/unix/zsyscall_netbsd_386.go
@@ -1824,28 +1824,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_netbsd_amd64.go b/unix/zsyscall_netbsd_amd64.go
index 3cda65b0d..a60556bab 100644
--- a/unix/zsyscall_netbsd_amd64.go
+++ b/unix/zsyscall_netbsd_amd64.go
@@ -1824,28 +1824,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_netbsd_arm.go b/unix/zsyscall_netbsd_arm.go
index 1e1fea902..9f788917a 100644
--- a/unix/zsyscall_netbsd_arm.go
+++ b/unix/zsyscall_netbsd_arm.go
@@ -1824,28 +1824,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_netbsd_arm64.go b/unix/zsyscall_netbsd_arm64.go
index 3b77da110..82a4cb2dc 100644
--- a/unix/zsyscall_netbsd_arm64.go
+++ b/unix/zsyscall_netbsd_arm64.go
@@ -1824,28 +1824,6 @@ func munmap(addr uintptr, length uintptr) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_386.go b/unix/zsyscall_openbsd_386.go
index 9ab9abf72..66b3b6456 100644
--- a/unix/zsyscall_openbsd_386.go
+++ b/unix/zsyscall_openbsd_386.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_amd64.go b/unix/zsyscall_openbsd_amd64.go
index 915761eab..c5c4cc112 100644
--- a/unix/zsyscall_openbsd_amd64.go
+++ b/unix/zsyscall_openbsd_amd64.go
@@ -2213,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_arm.go b/unix/zsyscall_openbsd_arm.go
index 8e87fdf15..93bfbb328 100644
--- a/unix/zsyscall_openbsd_arm.go
+++ b/unix/zsyscall_openbsd_arm.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_arm64.go b/unix/zsyscall_openbsd_arm64.go
index 12a7a2160..a107b8fda 100644
--- a/unix/zsyscall_openbsd_arm64.go
+++ b/unix/zsyscall_openbsd_arm64.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_mips64.go b/unix/zsyscall_openbsd_mips64.go
index b19e8aa03..c427de509 100644
--- a/unix/zsyscall_openbsd_mips64.go
+++ b/unix/zsyscall_openbsd_mips64.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_ppc64.go b/unix/zsyscall_openbsd_ppc64.go
index fb99594c9..60c1a99ae 100644
--- a/unix/zsyscall_openbsd_ppc64.go
+++ b/unix/zsyscall_openbsd_ppc64.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_openbsd_riscv64.go b/unix/zsyscall_openbsd_riscv64.go
index 32cbbbc52..52eba360f 100644
--- a/unix/zsyscall_openbsd_riscv64.go
+++ b/unix/zsyscall_openbsd_riscv64.go
@@ -549,6 +549,12 @@ func ioctl(fd int, req uint, arg uintptr) (err error) {
 	return
 }
 
+var libc_ioctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	_, _, e1 := syscall_syscall(libc_ioctl_trampoline_addr, uintptr(fd), uintptr(req), uintptr(arg))
 	if e1 != 0 {
@@ -557,10 +563,6 @@ func ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) {
 	return
 }
 
-var libc_ioctl_trampoline_addr uintptr
-
-//go:cgo_import_dynamic libc_ioctl ioctl "libc.so"
-
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
 func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
@@ -2211,28 +2213,6 @@ var libc_munmap_trampoline_addr uintptr
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_read_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(libc_write_trampoline_addr, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/zsyscall_zos_s390x.go b/unix/zsyscall_zos_s390x.go
index c31681743..1d8fe1d4b 100644
--- a/unix/zsyscall_zos_s390x.go
+++ b/unix/zsyscall_zos_s390x.go
@@ -40,17 +40,6 @@ func read(fd int, p []byte) (n int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
-	r0, _, e1 := syscall_syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
-	n = int(r0)
-	if e1 != 0 {
-		err = errnoErr(e1)
-	}
-	return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
 func write(fd int, p []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {