vendor raymenu dependencies

raymenu/vendor/github.com/ebitengine/purego/syscall_sysv_stackargs.go

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2026 The Ebitengine Authors
+
+//go:build linux && (ppc64le || s390x)
+
+package purego
+
+import "unsafe"
+
+type callbackArgs struct {
+	index uintptr
+	// args points to the argument block.
+	//
+	// The structure of the arguments goes
+	// float registers followed by the
+	// integer registers followed by the stack.
+	//
+	// This variable is treated as a continuous
+	// block of memory containing all of the arguments
+	// for this callback.
+	args unsafe.Pointer
+	// Below are out-args from callbackWrap
+	result uintptr
+	// stackArgs points to stack-passed arguments for architectures where
+	// they can't be made contiguous with register args (e.g., ppc64le).
+	// On other architectures, this is nil and stack args are read from
+	// the end of the args block.
+	stackArgs unsafe.Pointer
+}
+
+func (c *callbackArgs) stackFrame() unsafe.Pointer {
+	return c.stackArgs
+}