Add a script to detect function overlaps in the CSV

Helps identify and fix function sizes in the function CSV

tools/detect_function_csv_overlaps.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+from common.util import utils
+
+prev = None
+
+for info in utils.get_functions():
+    if prev is not None:
+        if (prev.addr <= info.addr < prev.addr + prev.size) or \
+                (prev.addr <= info.addr + info.size < prev.addr + prev.size):
+            print(
+                f"overlap between {prev.addr:x} and {info.addr:x} (expected size: {info.addr - prev.addr:06})")
+
+    prev = info