1 files changed, 52 insertions, 0 deletions
diff --git a/src/cmd/dist/sys_windows.go b/src/cmd/dist/sys_windows.go
new file mode 100644
index 0000000..2f6a1b0
--- /dev/null
+++ b/src/cmd/dist/sys_windows.go
@@ -0,0 +1,52 @@
+// Copyright 2015 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 main
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var (
+	modkernel32       = syscall.NewLazyDLL("kernel32.dll")
+	procGetSystemInfo = modkernel32.NewProc("GetSystemInfo")
+)
+
+// see https://msdn.microsoft.com/en-us/library/windows/desktop/ms724958(v=vs.85).aspx
+type systeminfo struct {
+	wProcessorArchitecture      uint16
+	wReserved                   uint16
+	dwPageSize                  uint32
+	lpMinimumApplicationAddress uintptr
+	lpMaximumApplicationAddress uintptr
+	dwActiveProcessorMask       uintptr
+	dwNumberOfProcessors        uint32
+	dwProcessorType             uint32
+	dwAllocationGranularity     uint32
+	wProcessorLevel             uint16
+	wProcessorRevision          uint16
+}
+
+const (
+	PROCESSOR_ARCHITECTURE_AMD64 = 9
+	PROCESSOR_ARCHITECTURE_INTEL = 0
+	PROCESSOR_ARCHITECTURE_ARM   = 5
+)
+
+var sysinfo systeminfo
+
+func sysinit() {
+	syscall.Syscall(procGetSystemInfo.Addr(), 1, uintptr(unsafe.Pointer(&sysinfo)), 0, 0)
+	switch sysinfo.wProcessorArchitecture {
+	case PROCESSOR_ARCHITECTURE_AMD64:
+		gohostarch = "amd64"
+	case PROCESSOR_ARCHITECTURE_INTEL:
+		gohostarch = "386"
+	case PROCESSOR_ARCHITECTURE_ARM:
+		gohostarch = "arm"
+	default:
+		fatalf("unknown processor architecture")
+	}
+}