1 files changed, 61 insertions, 0 deletions
diff --git a/src/runtime/cgo/gcc_windows_amd64.c b/src/runtime/cgo/gcc_windows_amd64.c
new file mode 100644
index 000000000..ce7e06b3d
--- /dev/null
+++ b/src/runtime/cgo/gcc_windows_amd64.c
@@ -0,0 +1,61 @@
+// 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 <process.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "libcgo.h"
+
+static void threadentry(void*);
+
+/* 2MB is default stack size for 64-bit Windows.
+   Allocation granularity on Windows is typically 64 KB.
+   The constant is also hardcoded in cmd/ld/pe.c (keep synchronized). */
+#define STACKSIZE (2*1024*1024)
+
+void
+x_cgo_init(G *g)
+{
+	int tmp;
+	g->stacklo = (uintptr)&tmp - STACKSIZE + 8*1024;
+}
+
+
+void
+_cgo_sys_thread_start(ThreadStart *ts)
+{
+	uintptr_t thandle;
+
+	thandle = _beginthread(threadentry, 0, ts);
+	if(thandle == -1) {
+		fprintf(stderr, "runtime: failed to create new OS thread (%d)\n", errno);
+		abort();
+	}
+}
+
+static void
+threadentry(void *v)
+{
+	ThreadStart ts;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	ts.g->stackhi = (uintptr)&ts;
+	ts.g->stacklo = (uintptr)&ts - STACKSIZE + 8*1024;
+
+	/*
+	 * Set specific keys in thread local storage.
+	 */
+	asm volatile (
+	  "movq %0, %%gs:0x28\n"	// MOVL tls0, 0x28(GS)
+	  "movq %%gs:0x28, %%rax\n" // MOVQ 0x28(GS), tmp
+	  "movq %1, 0(%%rax)\n" // MOVQ g, 0(GS)
+	  :: "r"(ts.tls), "r"(ts.g) : "%rax"
+	);
+
+	crosscall_amd64(ts.fn);
+}