runtime: convert netbsd/arm to Go
This was the last src/runtime/*.c file.
LGTM=austin
R=austin
CC=golang-codereviews
https://golang.org/cl/187770043
diff --git a/src/runtime/os_netbsd_arm.go b/src/runtime/os_netbsd_arm.go
new file mode 100644
index 0000000..83c4c06
--- /dev/null
+++ b/src/runtime/os_netbsd_arm.go
@@ -0,0 +1,28 @@
+// 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.
+
+package runtime
+
+import "unsafe"
+
+func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
+ // Machine dependent mcontext initialisation for LWP.
+ mc.__gregs[_REG_R15] = uint32(funcPC(lwp_tramp))
+ mc.__gregs[_REG_R13] = uint32(uintptr(stk))
+ mc.__gregs[_REG_R0] = uint32(uintptr(unsafe.Pointer(mp)))
+ mc.__gregs[_REG_R1] = uint32(uintptr(unsafe.Pointer(gp)))
+ mc.__gregs[_REG_R2] = uint32(fn)
+}
+
+func checkgoarm() {
+ // TODO(minux)
+}
+
+//go:nosplit
+func cputicks() int64 {
+ // Currently cputicks() is used in blocking profiler and to seed runtime·fastrand1().
+ // runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
+ // TODO: need more entropy to better seed fastrand1.
+ return nanotime()
+}
