diff -r 4f153a23adab -r 6d9efbef00a9 vendor/golang.org/x/sys/unix/syscall_freebsd_amd64.go
--- a/vendor/golang.org/x/sys/unix/syscall_freebsd_amd64.go	Mon Jun 07 20:58:18 2021 +0200
+++ b/vendor/golang.org/x/sys/unix/syscall_freebsd_amd64.go	Sun Jul 11 10:35:56 2021 +0200
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build amd64 && freebsd
 // +build amd64,freebsd
 
 package unix
@@ -55,6 +56,10 @@
 
 func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)
 
+func PtraceGetFsBase(pid int, fsbase *int64) (err error) {
+	return ptrace(PTRACE_GETFSBASE, pid, uintptr(unsafe.Pointer(fsbase)), 0)
+}
+
 func PtraceIO(req int, pid int, addr uintptr, out []byte, countin int) (count int, err error) {
 	ioDesc := PtraceIoDesc{Op: int32(req), Offs: (*byte)(unsafe.Pointer(addr)), Addr: (*byte)(unsafe.Pointer(&out[0])), Len: uint64(countin)}
 	err = ptrace(PTRACE_IO, pid, uintptr(unsafe.Pointer(&ioDesc)), 0)