Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 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 0000000..3ff3c64
--- /dev/null
+++ b/src/runtime/cgo/gcc_windows_amd64.c
@@ -0,0 +1,51 @@
+// 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 WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <process.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include "libcgo.h"
+#include "libcgo_windows.h"
+
+static void threadentry(void*);
+static void (*setg_gcc)(void*);
+static DWORD *tls_g;
+
+void
+x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
+{
+	setg_gcc = setg;
+	tls_g = (DWORD *)tlsg;
+}
+
+
+void
+_cgo_sys_thread_start(ThreadStart *ts)
+{
+	_cgo_beginthread(threadentry, ts);
+}
+
+static void
+threadentry(void *v)
+{
+	ThreadStart ts;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	// minit queries stack bounds from the OS.
+
+	/*
+	 * Set specific keys in thread local storage.
+	 */
+	asm volatile (
+	  "movq %0, %%gs:0(%1)\n"	// MOVL tls0, 0(tls_g)(GS)
+	  :: "r"(ts.tls), "r"(*tls_g)
+	);
+
+	crosscall_amd64(ts.fn, setg_gcc, (void*)ts.g);
+}