ELF

fuck_so.py

from subprocess import Popen, PIPE
import struct
import os
fuckfile = r'z:\libGame.so'
total = os.stat(fuckfile).st_size
print('totle file size is 0x%x' % total)
f = open(fuckfile, 'rb')
l1 = f.read(16)
l2 = f.read(16)
l3 = f.read(16)
l3 = l3[:-2] + b'\x28\x00' #e_shentsize = 0x28
l4 = f.read(16)
l = f.read()
max_section_cnt, e_shnum_result, output = 0, 0, ''
def make_one(e_shnum):
    _l3 = struct.pack('<I12s', (total - e_shnum * 0x28), struct.unpack('<I12s', l3)[1])
    #print hex(struct.unpack('<I12s', _l3)[0])
    _l4 = struct.pack('<H14s', e_shnum, struct.unpack('<H14s', l4)[1])
    print hex(struct.unpack('<H14s', _l4)[0])

    open(r'test.so', 'wb').write(l1 + l2 + _l3 + _l4 + l)

def check():
    p = Popen('readelf -S test.so', shell = True, stdout = PIPE, stderr = PIPE)
    s = p.communicate()
    return s


for i in range(0x16):
    make_one(i)
    raw_input(check()[0])
#     section_cnt = len(s[0].split('\n'))
#     if section_cnt >= max_section_cnt:
#         print('new max 0x%x' % e_shnum)
#         max_section_cnt = section_cnt
#         e_shnum_result = e_shnum
#         output = s[0]
# print('\n'.join((str(max_section_cnt), hex(e_shnum_result), output)))
# print('done')