Make Nix builds work

1 files changed, 65 insertions, 0 deletions

diff --git a/vendor/golang.org/x/sys/cpu/cpu_openbsd_arm64.go b/vendor/golang.org/x/sys/cpu/cpu_openbsd_arm64.go
new file mode 100644
index 0000000..85b64d5
--- /dev/null
+++ b/vendor/golang.org/x/sys/cpu/cpu_openbsd_arm64.go
@@ -0,0 +1,65 @@
+// Copyright 2022 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 cpu
+
+import (
+        "syscall"
+        "unsafe"
+)
+
+// Minimal copy of functionality from x/sys/unix so the cpu package can call
+// sysctl without depending on x/sys/unix.
+
+const (
+        // From OpenBSD's sys/sysctl.h.
+        _CTL_MACHDEP = 7
+
+        // From OpenBSD's machine/cpu.h.
+        _CPU_ID_AA64ISAR0 = 2
+        _CPU_ID_AA64ISAR1 = 3
+)
+
+// Implemented in the runtime package (runtime/sys_openbsd3.go)
+func syscall_syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)
+
+//go:linkname syscall_syscall6 syscall.syscall6
+
+func sysctl(mib []uint32, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
+        _, _, errno := syscall_syscall6(libc_sysctl_trampoline_addr, uintptr(unsafe.Pointer(&mib[0])), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
+        if errno != 0 {
+                return errno
+        }
+        return nil
+}
+
+var libc_sysctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_sysctl sysctl "libc.so"
+
+func sysctlUint64(mib []uint32) (uint64, bool) {
+        var out uint64
+        nout := unsafe.Sizeof(out)
+        if err := sysctl(mib, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0); err != nil {
+                return 0, false
+        }
+        return out, true
+}
+
+func doinit() {
+        setMinimalFeatures()
+
+        // Get ID_AA64ISAR0 and ID_AA64ISAR1 from sysctl.
+        isar0, ok := sysctlUint64([]uint32{_CTL_MACHDEP, _CPU_ID_AA64ISAR0})
+        if !ok {
+                return
+        }
+        isar1, ok := sysctlUint64([]uint32{_CTL_MACHDEP, _CPU_ID_AA64ISAR1})
+        if !ok {
+                return
+        }
+        parseARM64SystemRegisters(isar0, isar1, 0)
+
+        Initialized = true
+}