1 files changed, 60 insertions, 0 deletions
diff --git a/src/pkg/runtime/cgo/windows_amd64.c b/src/pkg/runtime/cgo/windows_amd64.c
new file mode 100755
index 000000000..e8313e250
--- /dev/null
+++ b/src/pkg/runtime/cgo/windows_amd64.c
@@ -0,0 +1,60 @@
+// Copyright 2009 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.
+
+#define WIN64_LEAN_AND_MEAN
+#include <windows.h>
+#include "libcgo.h"
+
+static void *threadentry(void*);
+
+/* From what I've read 2MB is default for 64-bit Linux. 
+   Allocation granularity on Windows is typically 64 KB. */
+#define STACKSIZE (2*1024*1024)
+
+static void
+xinitcgo(void)
+{
+}
+
+void (*initcgo)(void) = xinitcgo;
+
+void
+libcgo_sys_thread_start(ThreadStart *ts)
+{
+	ts->g->stackguard = STACKSIZE;
+	_beginthread(threadentry, STACKSIZE, ts);
+}
+
+static void*
+threadentry(void *v)
+{
+	ThreadStart ts;
+	void *tls0;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	ts.g->stackbase = (uintptr)&ts;
+
+	/*
+	 * libcgo_sys_thread_start set stackguard to stack size;
+	 * change to actual guard pointer.
+	 */
+	ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096;
+
+	/*
+	 * Set specific keys in thread local storage.
+	 */
+	tls0 = (void*)LocalAlloc(LPTR, 64);
+	asm volatile (
+	  "movq %0, %%gs:0x58\n"	// MOVL tls0, 0x58(GS)
+	  "movq %%gs:0x58, %%rax\n" // MOVQ 0x58(GS), tmp
+	  "movq %1, 0(%%rax)\n" // MOVQ g, 0(GS)
+	  "movq %2, 8(%%rax)\n" // MOVQ m, 8(GS)
+	  :: "r"(tls0), "r"(ts.g), "r"(ts.m) : "%rax"
+	);
+
+	crosscall_amd64(ts.fn);
+	return nil;
+}