Sw: Add test for stack pointer corruption

sw/tests/testSp.c

@@ -0,0 +1,24 @@
+// Copyright 2024 ETH Zurich and University of Bologna.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Sergio Mazzola <smazzola@iis.ee.ethz.ch>
+
+// Test stack pointer corruption
+
+#include <soc_addr_map.h>
+#include <stdint.h>
+
+int main() {
+    volatile int32_t a = 0;
+
+    for (volatile int32_t i = 0; i < 5; i++) {
+        a += i;
+    }
+
+    if (a == 10) {
+        return 0x7fffffff;
+    } else {
+        return 0xabcdef00;
+    }
+}