find-potentially-unmappable.py

#!/usr/bin/python

import subprocess

unmappable_funcs = set()

out, err = subprocess.Popen(["objdump", "-t", "Build/Kernel/Kernel"], stdout=subprocess.PIPE).communicate()
for line in out.splitlines():
  line = line.strip()
  line = line.decode('ascii')
  if '.unmap_after_init' in line:
    func = line.split()[-1]
    unmappable_funcs.add(func)

potentially_unmappable = set()

out, err = subprocess.Popen(["objdump", "-d", "Build/Kernel/Kernel"], stdout=subprocess.PIPE).communicate()
for line in out.splitlines():
  in_text = False
  cur_func = ''
  finished_reading_text = False
  for line in out.splitlines():
    line = line.strip()
    line = line.decode('ascii')

    if 'Disassembly of section .text:' in line:
      in_text = True
      continue
    if 'Disassembly of section ' in line:
      finished_reading_text = True
      break
    if not in_text:
      continue

    if line.endswith('>:'):
      cur_func = line

    for symbol in unmappable_funcs:
      if symbol in line:
        potentially_unmappable.add(cur_func)
        break

  if finished_reading_text:
    break

for func in potentially_unmappable:
  print(func)