Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) #!/usr/bin/env python
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) # SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) # Usage: unwcheck.py FILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) # This script checks the unwind info of each function in file FILE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) # and verifies that the sum of the region-lengths matches the total
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) # length of the function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) # Based on a shell/awk script originally written by Harish Patil,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) # which was converted to Perl by Matthew Chapman, which was converted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) # to Python by David Mosberger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) import os
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) import re
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) import sys
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) if len(sys.argv) != 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)     print("Usage: %s FILE" % sys.argv[0])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)     sys.exit(2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) readelf = os.getenv("READELF", "readelf")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) start_pattern = re.compile("<([^>]*)>: \[0x([0-9a-f]+)-0x([0-9a-f]+)\]")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) rlen_pattern  = re.compile(".*rlen=([0-9]+)")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) def check_func (func, slots, rlen_sum):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)     if slots != rlen_sum:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)         global num_errors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)         num_errors += 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)         if not func: func = "[%#x-%#x]" % (start, end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)         print("ERROR: %s: %lu slots, total region length = %lu" % (func, slots, rlen_sum))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)     return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) num_funcs = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) num_errors = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) func = False
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) slots = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) rlen_sum = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) for line in os.popen("%s -u %s" % (readelf, sys.argv[1])):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)     m = start_pattern.match(line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)     if m:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)         check_func(func, slots, rlen_sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)         func  = m.group(1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)         start = int(m.group(2), 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)         end   = int(m.group(3), 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)         slots = 3 * (end - start) / 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)         rlen_sum = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)         num_funcs += 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)     else:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)         m = rlen_pattern.match(line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)         if m:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)             rlen_sum += int(m.group(1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) check_func(func, slots, rlen_sum)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if num_errors == 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)     print("No errors detected in %u functions." % num_funcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)     if num_errors > 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)         err="errors"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)     else:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)         err="error"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)     print("%u %s detected in %u functions." % (num_errors, err, num_funcs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)     sys.exit(1)