cpu: avoid illegal instruction on openbsd/arm64
On OpenBSD, this package tries to read a privileged register, which
results in a SIGILL. Use the same workaround as Android, iOS and NetBSD.
Update golang/go#31746
Change-Id: I981249310169bc30b018c1a157529a4e46597d81
Reviewed-on: https://go-review.googlesource.com/c/sys/+/263337
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
diff --git a/cpu/cpu_arm64.go b/cpu/cpu_arm64.go
index 951078f..2f64d3b 100644
--- a/cpu/cpu_arm64.go
+++ b/cpu/cpu_arm64.go
@@ -39,7 +39,7 @@
func archInit() {
switch runtime.GOOS {
- case "android", "darwin", "ios", "netbsd":
+ case "android", "darwin", "ios", "netbsd", "openbsd":
// Android and iOS don't seem to allow reading these registers.
//
// NetBSD:
@@ -47,6 +47,9 @@
// It can be read via sysctl(3). Example for future implementers:
// https://nxr.netbsd.org/xref/src/usr.sbin/cpuctl/arch/aarch64.c
//
+ // OpenBSD:
+ // See https://golang.org/issue/31746
+ //
// Fake the minimal features expected by
// TestARM64minimalFeatures.
ARM64.HasASIMD = true
