mirror of https://github.com/pret/pokecrystal.git
138 lines
3.9 KiB
Python
Executable File
138 lines
3.9 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Usage: unnamed.py [-h] [-r rootdir] [-l count] pokecrystal.sym
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Parse the symfile to find unnamed symbols.
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"""
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import sys
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import argparse
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import subprocess
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import struct
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import enum
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import signal
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class symtype(enum.Enum):
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LOCAL = 0
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IMPORT = 1
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EXPORT = 2
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def unpack_from(fmt, file):
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size = struct.calcsize(fmt)
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return struct.unpack(fmt, file.read(size))
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def read_string(file):
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buf = bytearray()
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while True:
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b = file.read(1)
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if b is None or b == b'\0':
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return buf.decode()
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buf += b
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# Fix broken pipe when using `head`
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signal.signal(signal.SIGPIPE, signal.SIG_DFL)
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parser = argparse.ArgumentParser(description='Parse the symfile to find unnamed symbols')
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parser.add_argument('symfile', type=argparse.FileType('r'),
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help='the list of symbols')
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parser.add_argument('-r', '--rootdir', type=str,
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help='scan the output files to obtain a list of files with unnamed symbols (note: will rebuild objects as necessary)')
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parser.add_argument('-l', '--list', type=int, default=0,
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help="output this many of each file's unnamed symbols (note: requires -r)")
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args = parser.parse_args()
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# Get list of object files
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objects = None
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if args.rootdir:
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for line in subprocess.Popen(['make', '-C', args.rootdir, '-s', '-p', 'DEBUG=1'],
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stdout=subprocess.PIPE).stdout.read().decode().split('\n'):
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if line.startswith('pokecrystal_obj :='):
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objects = line[len('pokecrystal_obj :='):].strip().split()
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break
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else:
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print('Error: Object files not found!', file=sys.stderr)
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sys.exit(1)
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# Scan all unnamed symbols from the symfile
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symbols_total = 0
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symbols = set()
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for line in args.symfile:
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line = line.split(';')[0].strip()
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split = line.split(' ')
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if len(split) < 2:
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continue
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symbols_total += 1
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symbol = ' '.join(split[1:]).strip()
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if symbol[-3:].lower() == split[0][-3:].lower():
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symbols.add(symbol)
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# If no object files were provided, just print what we know and exit
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unnamed_percent = 100 * (symbols_total - len(symbols)) / symbols_total
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print(f'Unnamed pokecrystal symbols: {len(symbols)} ({unnamed_percent:.2f}% complete)')
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if not objects:
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for sym in symbols:
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print(sym)
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sys.exit()
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# Count the amount of symbols in each file
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file_symbols = {}
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for objfile in objects:
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with open(objfile, 'rb') as file:
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obj_ver = None
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magic = unpack_from('4s', file)[0]
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if magic == b'RGB6':
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obj_ver = 6
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elif magic == b'RGB9':
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obj_ver = 10 + unpack_from('<I', file)[0]
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if obj_ver not in [6, 10, 11, 12, 13, 15, 16, 17, 18]:
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print(f"Error: File '{objfile}' is of an unknown format.", file=sys.stderr)
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sys.exit(1)
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num_symbols = unpack_from('<I', file)[0]
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unpack_from('<I', file) # skip num sections
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if obj_ver in [16, 17, 18]:
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node_filenames = []
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num_nodes = unpack_from('<I', file)[0]
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for x in range(num_nodes):
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unpack_from('<II', file) # parent id, parent line no
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node_type = unpack_from('<B', file)[0]
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if node_type:
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node_filenames.append(read_string(file))
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else:
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node_filenames.append('rept')
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depth = unpack_from('<I', file)[0]
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for i in range(depth):
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unpack_from('<I', file) # rept iterations
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node_filenames.reverse()
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for _ in range(num_symbols):
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sym_name = read_string(file)
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sym_type = symtype(unpack_from('<B', file)[0] & 0x7f)
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if sym_type == symtype.IMPORT:
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continue
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if obj_ver in [16, 17, 18]:
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sym_fileno = unpack_from('<I', file)[0]
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sym_filename = node_filenames[sym_fileno]
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else:
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sym_filename = read_string(file)
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unpack_from('<III', file)
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if sym_name not in symbols:
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continue
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if sym_filename not in file_symbols:
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file_symbols[sym_filename] = []
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file_symbols[sym_filename].append(sym_name)
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# Sort the files, the one with the most amount of symbols first
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file_symbols = sorted(file_symbols.items(), key=lambda item: len(item[1]), reverse=True)
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for filename, unnamed_syms in file_symbols:
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sym_list = ', '.join(unnamed_syms[:args.list])
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print(f'{filename}: {len(unnamed_syms)}{": " + sym_list if sym_list else ""}')
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