Index: src/runtime/os_openbsd_syscall2.go
--- src/runtime/os_openbsd_syscall2.go.orig
+++ src/runtime/os_openbsd_syscall2.go
@@ -1,99 +0,0 @@
-// Copyright 2020 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.
-
-//go:build openbsd && mips64
-
-package runtime
-
-import (
-	"unsafe"
-)
-
-//go:noescape
-func sigaction(sig uint32, new, old *sigactiont)
-
-func kqueue() int32
-
-//go:noescape
-func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32
-
-func raiseproc(sig uint32)
-
-func getthrid() int32
-func thrkill(tid int32, sig int)
-
-// read calls the read system call.
-// It returns a non-negative number of bytes written or a negative errno value.
-func read(fd int32, p unsafe.Pointer, n int32) int32
-
-func closefd(fd int32) int32
-
-func exit(code int32)
-func usleep(usec uint32)
-
-//go:nosplit
-func usleep_no_g(usec uint32) {
-	usleep(usec)
-}
-
-// write calls the write system call.
-// It returns a non-negative number of bytes written or a negative errno value.
-//
-//go:noescape
-func write1(fd uintptr, p unsafe.Pointer, n int32) int32
-
-//go:noescape
-func open(name *byte, mode, perm int32) int32
-
-// return value is only set on linux to be used in osinit()
-func madvise(addr unsafe.Pointer, n uintptr, flags int32) int32
-
-// exitThread terminates the current thread, writing *wait = 0 when
-// the stack is safe to reclaim.
-//
-//go:noescape
-func exitThread(wait *uint32)
-
-//go:noescape
-func obsdsigprocmask(how int32, new sigset) sigset
-
-//go:nosplit
-//go:nowritebarrierrec
-func sigprocmask(how int32, new, old *sigset) {
-	n := sigset(0)
-	if new != nil {
-		n = *new
-	}
-	r := obsdsigprocmask(how, n)
-	if old != nil {
-		*old = r
-	}
-}
-
-func pipe2(flags int32) (r, w int32, errno int32)
-
-//go:noescape
-func setitimer(mode int32, new, old *itimerval)
-
-//go:noescape
-func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32
-
-// mmap calls the mmap system call. It is implemented in assembly.
-// We only pass the lower 32 bits of file offset to the
-// assembly routine; the higher bits (if required), should be provided
-// by the assembly routine as 0.
-// The err result is an OS error code such as ENOMEM.
-func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (p unsafe.Pointer, err int)
-
-// munmap calls the munmap system call. It is implemented in assembly.
-func munmap(addr unsafe.Pointer, n uintptr)
-
-func nanotime1() int64
-
-//go:noescape
-func sigaltstack(new, old *stackt)
-
-func closeonexec(fd int32)
-
-func walltime() (sec int64, nsec int32)
