1 files changed, 65 insertions, 0 deletions
diff --git a/arch/ia64/scripts/unwcheck.py b/arch/ia64/scripts/unwcheck.py
new file mode 100644
index 0000000000..9581742f0d
--- /dev/null
+++ b/arch/ia64/scripts/unwcheck.py
@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+#
+# Usage: unwcheck.py FILE
+#
+# This script checks the unwind info of each function in file FILE
+# and verifies that the sum of the region-lengths matches the total
+# length of the function.
+#
+# Based on a shell/awk script originally written by Harish Patil,
+# which was converted to Perl by Matthew Chapman, which was converted
+# to Python by David Mosberger.
+#
+import os
+import re
+import sys
+
+if len(sys.argv) != 2:
+    print("Usage: %s FILE" % sys.argv[0])
+    sys.exit(2)
+
+readelf = os.getenv("READELF", "readelf")
+
+start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
+rlen_pattern  = re.compile(".*rlen=([0-9]+)")
+
+def check_func (func, slots, rlen_sum):
+    if slots != rlen_sum:
+        global num_errors
+        num_errors += 1
+        if not func: func = "[%#x-%#x]" % (start, end)
+        print("ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum))
+    return
+
+num_funcs = 0
+num_errors = 0
+func = False
+slots = 0
+rlen_sum = 0
+for line in os.popen("%s -u %s" % (readelf, sys.argv[1])):
+    m = start_pattern.match(line)
+    if m:
+        check_func(func, slots, rlen_sum)
+
+        func  = m.group(1)
+        start = int(m.group(2), 16)
+        end   = int(m.group(3), 16)
+        slots = 3 * (end - start) / 16
+        rlen_sum = 0
+        num_funcs += 1
+    else:
+        m = rlen_pattern.match(line)
+        if m:
+            rlen_sum += int(m.group(1))
+check_func(func, slots, rlen_sum)
+
+if num_errors == 0:
+    print("No errors detected in %u functions." % num_funcs)
+else:
+    if num_errors > 1:
+        err="errors"
+    else:
+        err="error"
+    print("%u %s detected in %u functions." % (num_errors, err, num_funcs))
+    sys.exit(1)