Make Nix builds work

1 files changed, 173 insertions, 0 deletions

diff --git a/vendor/golang.org/x/sys/cpu/cpu_netbsd_arm64.go b/vendor/golang.org/x/sys/cpu/cpu_netbsd_arm64.go
new file mode 100644
index 0000000..ebfb3fc
--- /dev/null
+++ b/vendor/golang.org/x/sys/cpu/cpu_netbsd_arm64.go
@@ -0,0 +1,173 @@
+// 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.
+
+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 (
+        _CTL_QUERY = -2
+
+        _SYSCTL_VERS_1 = 0x1000000
+)
+
+var _zero uintptr
+
+func sysctl(mib []int32, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
+        var _p0 unsafe.Pointer
+        if len(mib) > 0 {
+                _p0 = unsafe.Pointer(&mib[0])
+        } else {
+                _p0 = unsafe.Pointer(&_zero)
+        }
+        _, _, errno := syscall.Syscall6(
+                syscall.SYS___SYSCTL,
+                uintptr(_p0),
+                uintptr(len(mib)),
+                uintptr(unsafe.Pointer(old)),
+                uintptr(unsafe.Pointer(oldlen)),
+                uintptr(unsafe.Pointer(new)),
+                uintptr(newlen))
+        if errno != 0 {
+                return errno
+        }
+        return nil
+}
+
+type sysctlNode struct {
+        Flags          uint32
+        Num            int32
+        Name           [32]int8
+        Ver            uint32
+        __rsvd         uint32
+        Un             [16]byte
+        _sysctl_size   [8]byte
+        _sysctl_func   [8]byte
+        _sysctl_parent [8]byte
+        _sysctl_desc   [8]byte
+}
+
+func sysctlNodes(mib []int32) ([]sysctlNode, error) {
+        var olen uintptr
+
+        // Get a list of all sysctl nodes below the given MIB by performing
+        // a sysctl for the given MIB with CTL_QUERY appended.
+        mib = append(mib, _CTL_QUERY)
+        qnode := sysctlNode{Flags: _SYSCTL_VERS_1}
+        qp := (*byte)(unsafe.Pointer(&qnode))
+        sz := unsafe.Sizeof(qnode)
+        if err := sysctl(mib, nil, &olen, qp, sz); err != nil {
+                return nil, err
+        }
+
+        // Now that we know the size, get the actual nodes.
+        nodes := make([]sysctlNode, olen/sz)
+        np := (*byte)(unsafe.Pointer(&nodes[0]))
+        if err := sysctl(mib, np, &olen, qp, sz); err != nil {
+                return nil, err
+        }
+
+        return nodes, nil
+}
+
+func nametomib(name string) ([]int32, error) {
+        // Split name into components.
+        var parts []string
+        last := 0
+        for i := 0; i < len(name); i++ {
+                if name[i] == '.' {
+                        parts = append(parts, name[last:i])
+                        last = i + 1
+                }
+        }
+        parts = append(parts, name[last:])
+
+        mib := []int32{}
+        // Discover the nodes and construct the MIB OID.
+        for partno, part := range parts {
+                nodes, err := sysctlNodes(mib)
+                if err != nil {
+                        return nil, err
+                }
+                for _, node := range nodes {
+                        n := make([]byte, 0)
+                        for i := range node.Name {
+                                if node.Name[i] != 0 {
+                                        n = append(n, byte(node.Name[i]))
+                                }
+                        }
+                        if string(n) == part {
+                                mib = append(mib, int32(node.Num))
+                                break
+                        }
+                }
+                if len(mib) != partno+1 {
+                        return nil, err
+                }
+        }
+
+        return mib, nil
+}
+
+// aarch64SysctlCPUID is struct aarch64_sysctl_cpu_id from NetBSD's <aarch64/armreg.h>
+type aarch64SysctlCPUID struct {
+        midr      uint64 /* Main ID Register */
+        revidr    uint64 /* Revision ID Register */
+        mpidr     uint64 /* Multiprocessor Affinity Register */
+        aa64dfr0  uint64 /* A64 Debug Feature Register 0 */
+        aa64dfr1  uint64 /* A64 Debug Feature Register 1 */
+        aa64isar0 uint64 /* A64 Instruction Set Attribute Register 0 */
+        aa64isar1 uint64 /* A64 Instruction Set Attribute Register 1 */
+        aa64mmfr0 uint64 /* A64 Memory Model Feature Register 0 */
+        aa64mmfr1 uint64 /* A64 Memory Model Feature Register 1 */
+        aa64mmfr2 uint64 /* A64 Memory Model Feature Register 2 */
+        aa64pfr0  uint64 /* A64 Processor Feature Register 0 */
+        aa64pfr1  uint64 /* A64 Processor Feature Register 1 */
+        aa64zfr0  uint64 /* A64 SVE Feature ID Register 0 */
+        mvfr0     uint32 /* Media and VFP Feature Register 0 */
+        mvfr1     uint32 /* Media and VFP Feature Register 1 */
+        mvfr2     uint32 /* Media and VFP Feature Register 2 */
+        pad       uint32
+        clidr     uint64 /* Cache Level ID Register */
+        ctr       uint64 /* Cache Type Register */
+}
+
+func sysctlCPUID(name string) (*aarch64SysctlCPUID, error) {
+        mib, err := nametomib(name)
+        if err != nil {
+                return nil, err
+        }
+
+        out := aarch64SysctlCPUID{}
+        n := unsafe.Sizeof(out)
+        _, _, errno := syscall.Syscall6(
+                syscall.SYS___SYSCTL,
+                uintptr(unsafe.Pointer(&mib[0])),
+                uintptr(len(mib)),
+                uintptr(unsafe.Pointer(&out)),
+                uintptr(unsafe.Pointer(&n)),
+                uintptr(0),
+                uintptr(0))
+        if errno != 0 {
+                return nil, errno
+        }
+        return &out, nil
+}
+
+func doinit() {
+        cpuid, err := sysctlCPUID("machdep.cpu0.cpu_id")
+        if err != nil {
+                setMinimalFeatures()
+                return
+        }
+        parseARM64SystemRegisters(cpuid.aa64isar0, cpuid.aa64isar1, cpuid.aa64pfr0)
+
+        Initialized = true
+}