1 files changed, 27 insertions, 0 deletions
diff --git a/src/runtime/sys_x86.go b/src/runtime/sys_x86.go
new file mode 100644
index 0000000..f917cb8
--- /dev/null
+++ b/src/runtime/sys_x86.go
@@ -0,0 +1,27 @@
+// Copyright 2013 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.
+
+// +build amd64 386
+
+package runtime
+
+import (
+	"runtime/internal/sys"
+	"unsafe"
+)
+
+// adjust Gobuf as if it executed a call to fn with context ctxt
+// and then did an immediate gosave.
+func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
+	sp := buf.sp
+	if sys.RegSize > sys.PtrSize {
+		sp -= sys.PtrSize
+		*(*uintptr)(unsafe.Pointer(sp)) = 0
+	}
+	sp -= sys.PtrSize
+	*(*uintptr)(unsafe.Pointer(sp)) = buf.pc
+	buf.sp = sp
+	buf.pc = uintptr(fn)
+	buf.ctxt = ctxt
+}