mirror of
https://github.com/isledecomp/isle-portable.git
synced 2024-11-22 23:48:12 -05:00
336 lines
9.7 KiB
Python
Executable file
336 lines
9.7 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
|
|
import argparse
|
|
from capstone import *
|
|
import difflib
|
|
import struct
|
|
import subprocess
|
|
import os
|
|
import sys
|
|
|
|
parser = argparse.ArgumentParser(allow_abbrev=False,
|
|
description='Recompilation Compare: compare an original EXE with a recompiled EXE + PDB.')
|
|
parser.add_argument('original', metavar='original-binary', help='The original binary')
|
|
parser.add_argument('recompiled', metavar='recompiled-binary', help='The recompiled binary')
|
|
parser.add_argument('pdb', metavar='recompiled-pdb', help='The PDB of the recompiled binary')
|
|
parser.add_argument('decomp_dir', metavar='decomp-dir', help='The decompiled source tree')
|
|
parser.add_argument('--verbose', '-v', metavar='offset', help='Print assembly diff for specific function (original file\'s offset)')
|
|
parser.add_argument('--html', '-H', metavar='output-file', help='Generate searchable HTML summary of status and diffs')
|
|
|
|
args = parser.parse_args()
|
|
|
|
verbose = None
|
|
if args.verbose:
|
|
try:
|
|
verbose = int(args.verbose, 16)
|
|
except ValueError:
|
|
parser.error('invalid verbose argument')
|
|
html = args.html
|
|
|
|
original = args.original
|
|
if not os.path.isfile(original):
|
|
parser.error('Original binary does not exist')
|
|
|
|
recomp = args.recompiled
|
|
if not os.path.isfile(recomp):
|
|
parser.error('Recompiled binary does not exist')
|
|
|
|
syms = args.pdb
|
|
if not os.path.isfile(syms):
|
|
parser.error('Symbols PDB does not exist')
|
|
|
|
source = args.decomp_dir
|
|
if not os.path.isdir(source):
|
|
parser.error('Source directory does not exist')
|
|
|
|
# Declare a class that can automatically convert virtual executable addresses
|
|
# to file addresses
|
|
class Bin:
|
|
def __init__(self, filename):
|
|
self.file = open(filename, 'rb')
|
|
|
|
#HACK: Strictly, we should be parsing the header, but we know where
|
|
# everything is in these two files so we just jump straight there
|
|
|
|
# Read ImageBase
|
|
self.file.seek(0xB4)
|
|
self.imagebase = struct.unpack('i', self.file.read(4))[0]
|
|
|
|
# Read .text VirtualAddress
|
|
self.file.seek(0x184)
|
|
self.textvirt = struct.unpack('i', self.file.read(4))[0]
|
|
|
|
# Read .text PointerToRawData
|
|
self.file.seek(0x18C)
|
|
self.textraw = struct.unpack('i', self.file.read(4))[0]
|
|
|
|
def __del__(self):
|
|
if self.file:
|
|
self.file.close()
|
|
|
|
def get_addr(self, virt):
|
|
return virt - self.imagebase - self.textvirt + self.textraw
|
|
|
|
def read(self, offset, size):
|
|
self.file.seek(self.get_addr(offset))
|
|
return self.file.read(size)
|
|
|
|
class RecompiledInfo:
|
|
addr = None
|
|
size = None
|
|
name = None
|
|
start = None
|
|
|
|
def get_wine_path(fn):
|
|
return subprocess.check_output(['winepath', '-w', fn]).decode('utf-8').strip()
|
|
|
|
def get_unix_path(fn):
|
|
return subprocess.check_output(['winepath', fn]).decode('utf-8').strip()
|
|
|
|
def get_file_in_script_dir(fn):
|
|
return os.path.join(os.path.dirname(os.path.abspath(sys.argv[0])), fn)
|
|
|
|
# Declare a class that parses the output of cvdump for fast access later
|
|
class SymInfo:
|
|
funcs = {}
|
|
lines = {}
|
|
|
|
def __init__(self, pdb, file):
|
|
call = [get_file_in_script_dir('cvdump.exe'), '-l', '-s']
|
|
|
|
if os.name != 'nt':
|
|
# Run cvdump through wine and convert path to Windows-friendly wine path
|
|
call.insert(0, 'wine')
|
|
call.append(get_wine_path(pdb))
|
|
else:
|
|
call.append(pdb)
|
|
|
|
print('Parsing %s...' % pdb)
|
|
|
|
line_dump = subprocess.check_output(call).decode('utf-8').split('\r\n')
|
|
|
|
current_section = None
|
|
|
|
for i, line in enumerate(line_dump):
|
|
if line.startswith('***'):
|
|
current_section = line[4:]
|
|
|
|
if current_section == 'SYMBOLS' and 'S_GPROC32' in line:
|
|
addr = int(line[26:34], 16)
|
|
|
|
|
|
|
|
info = RecompiledInfo()
|
|
info.addr = addr + recompfile.imagebase + recompfile.textvirt
|
|
|
|
use_dbg_offs = False
|
|
if use_dbg_offs:
|
|
debug_offs = line_dump[i + 2]
|
|
debug_start = int(debug_offs[22:30], 16)
|
|
debug_end = int(debug_offs[43:], 16)
|
|
|
|
info.start = debug_start
|
|
info.size = debug_end - debug_start
|
|
else:
|
|
info.start = 0
|
|
info.size = int(line[41:49], 16)
|
|
|
|
info.name = line[77:]
|
|
|
|
self.funcs[addr] = info
|
|
elif current_section == 'LINES' and line.startswith(' ') and not line.startswith(' '):
|
|
sourcepath = line.split()[0]
|
|
|
|
if os.name != 'nt':
|
|
# Convert filename to Unix path for file compare
|
|
sourcepath = get_unix_path(sourcepath)
|
|
|
|
if sourcepath not in self.lines:
|
|
self.lines[sourcepath] = {}
|
|
|
|
j = i + 2
|
|
while True:
|
|
ll = line_dump[j].split()
|
|
if len(ll) == 0:
|
|
break
|
|
|
|
k = 0
|
|
while k < len(ll):
|
|
linenum = int(ll[k + 0])
|
|
address = int(ll[k + 1], 16)
|
|
if linenum not in self.lines[sourcepath]:
|
|
self.lines[sourcepath][linenum] = address
|
|
k += 2
|
|
|
|
j += 1
|
|
|
|
def get_recompiled_address(self, filename, line):
|
|
addr = None
|
|
found = False
|
|
|
|
#print('Looking for ' + filename + ' line ' + str(line))
|
|
|
|
for fn in self.lines:
|
|
# Sometimes a PDB is compiled with a relative path while we always have
|
|
# an absolute path. Therefore we must
|
|
if os.path.samefile(fn, filename):
|
|
filename = fn
|
|
break
|
|
|
|
if filename in self.lines and line in self.lines[fn]:
|
|
addr = self.lines[fn][line]
|
|
|
|
if addr in self.funcs:
|
|
return self.funcs[addr]
|
|
else:
|
|
print('Failed to find function symbol with address: %s' % hex(addr))
|
|
else:
|
|
print('Failed to find function symbol with filename and line: %s:%s' % (filename, str(line)))
|
|
|
|
origfile = Bin(original)
|
|
recompfile = Bin(recomp)
|
|
syminfo = SymInfo(syms, recompfile)
|
|
|
|
print()
|
|
|
|
md = Cs(CS_ARCH_X86, CS_MODE_32)
|
|
|
|
def sanitize(file, mnemonic, op_str):
|
|
offsetplaceholder = '<OFFSET>'
|
|
|
|
if mnemonic == 'call' or mnemonic == 'jmp':
|
|
# Filter out "calls" because the offsets we're not currently trying to
|
|
# match offsets. As long as there's a call in the right place, it's
|
|
# probably accurate.
|
|
op_str = offsetplaceholder
|
|
else:
|
|
def filter_out_ptr(ptype, op_str):
|
|
try:
|
|
ptrstr = ptype + ' ptr ['
|
|
start = op_str.index(ptrstr) + len(ptrstr)
|
|
end = op_str.index(']', start)
|
|
|
|
# This will throw ValueError if not hex
|
|
inttest = int(op_str[start:end], 16)
|
|
|
|
return op_str[0:start] + offsetplaceholder + op_str[end:]
|
|
except ValueError:
|
|
return op_str
|
|
|
|
# Filter out dword ptrs where the pointer is to an offset
|
|
op_str = filter_out_ptr('dword', op_str)
|
|
op_str = filter_out_ptr('word', op_str)
|
|
op_str = filter_out_ptr('byte', op_str)
|
|
|
|
# Use heuristics to filter out any args that look like offsets
|
|
words = op_str.split(' ')
|
|
for i, word in enumerate(words):
|
|
try:
|
|
inttest = int(word, 16)
|
|
if inttest >= file.imagebase + file.textvirt:
|
|
words[i] = offsetplaceholder
|
|
except ValueError:
|
|
pass
|
|
op_str = ' '.join(words)
|
|
|
|
return mnemonic, op_str
|
|
|
|
def parse_asm(file, addr, size):
|
|
asm = []
|
|
data = file.read(addr, size)
|
|
for i in md.disasm(data, 0):
|
|
# Use heuristics to disregard some differences that aren't representative
|
|
# of the accuracy of a function (e.g. global offsets)
|
|
mnemonic, op_str = sanitize(file, i.mnemonic, i.op_str)
|
|
if op_str is None:
|
|
asm.append(mnemonic)
|
|
else:
|
|
asm.append("%s %s" % (mnemonic, op_str))
|
|
return asm
|
|
|
|
function_count = 0
|
|
total_accuracy = 0
|
|
htmlinsert = []
|
|
|
|
for subdir, dirs, files in os.walk(source):
|
|
for file in files:
|
|
srcfilename = os.path.join(os.path.abspath(subdir), file)
|
|
srcfile = open(srcfilename, 'r')
|
|
line_no = 0
|
|
|
|
while True:
|
|
try:
|
|
line = srcfile.readline()
|
|
line_no += 1
|
|
|
|
if not line:
|
|
break
|
|
|
|
if line.startswith('// OFFSET:'):
|
|
par = line[10:].strip().split()
|
|
module = par[0]
|
|
addr = int(par[1], 16)
|
|
|
|
find_open_bracket = line
|
|
while '{' not in find_open_bracket:
|
|
find_open_bracket = srcfile.readline()
|
|
line_no += 1
|
|
|
|
recinfo = syminfo.get_recompiled_address(srcfilename, line_no)
|
|
if not recinfo:
|
|
continue
|
|
|
|
if recinfo.size:
|
|
origasm = parse_asm(origfile, addr + recinfo.start, recinfo.size)
|
|
recompasm = parse_asm(recompfile, recinfo.addr + recinfo.start, recinfo.size)
|
|
|
|
diff = difflib.SequenceMatcher(None, origasm, recompasm)
|
|
ratio = diff.ratio()
|
|
else:
|
|
ratio = 0
|
|
|
|
print(' %s (%s / %s) is %.2f%% similar to the original' % (recinfo.name, hex(addr), hex(recinfo.addr), ratio * 100))
|
|
|
|
function_count += 1
|
|
total_accuracy += ratio
|
|
|
|
if recinfo.size:
|
|
if verbose == addr or html:
|
|
udiff = difflib.unified_diff(origasm, recompasm)
|
|
|
|
if verbose == addr:
|
|
for line in udiff:
|
|
print(line)
|
|
print()
|
|
print()
|
|
|
|
if html:
|
|
htmlinsert.append('{address: "%s", name: "%s", matching: %s, diff: "%s"}' % (hex(addr), recinfo.name, str(ratio), '\\n'.join(udiff).replace('"', '\\"').replace('\n', '\\n')))
|
|
|
|
except UnicodeDecodeError:
|
|
break
|
|
|
|
def gen_html(html, data):
|
|
templatefile = open(get_file_in_script_dir('template.html'), 'r')
|
|
if not templatefile:
|
|
print('Failed to find HTML template file, can\'t generate HTML summary')
|
|
return
|
|
|
|
templatedata = templatefile.read()
|
|
templatefile.close()
|
|
|
|
templatedata = templatedata.replace('/* INSERT DATA HERE */', ','.join(data), 1)
|
|
|
|
htmlfile = open(html, 'w')
|
|
if not htmlfile:
|
|
print('Failed to write to HTML file %s' % html)
|
|
return
|
|
|
|
htmlfile.write(templatedata)
|
|
htmlfile.close()
|
|
|
|
if html:
|
|
gen_html(html, htmlinsert)
|
|
|
|
if function_count > 0:
|
|
print('\nTotal accuracy %.2f%% across %i functions' % (total_accuracy / function_count * 100, function_count))
|