mirror of
https://github.com/coop-deluxe/sm64coopdx.git
synced 2024-11-22 12:05:11 +00:00
194 lines
6.3 KiB
Python
Executable file
194 lines
6.3 KiB
Python
Executable file
#!/usr/bin/env python3
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import sys
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import os.path
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lang = None
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# TODO: -S argument for shifted ROMs
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args = []
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for arg in sys.argv[1:]:
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if arg == '-j':
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lang = 'jp'
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elif arg == '-u':
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lang = 'us'
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elif arg == '-e':
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lang = 'eu'
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else:
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args.append(arg)
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if lang is None:
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lang = 'us'
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best = 0
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for path in ['build/us/sm64.us.z64', 'build/jp/sm64.jp.z64', 'build/eu/sm64.eu.z64']:
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try:
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if os.path.getmtime(path) > best:
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lang = path.split('/')[1]
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except Exception:
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pass
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print("Assuming language " + lang)
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baseimg = 'baserom.' + lang + '.z64'
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basemap = 'sm64.' + lang + '.map'
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myimg = 'build/' + lang + '/sm64.' + lang + '.z64'
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mymap = 'build/' + lang + '/sm64.map'
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if os.path.isfile('expected/' + mymap):
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basemap = 'expected/' + mymap
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required_files = [baseimg, myimg, mymap]
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if any(not os.path.isfile(path) for path in required_files):
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print(', '.join(required_files[:-1]) + " and " + required_files[-1] + " must exist.")
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exit(1)
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mybin = open(myimg, 'rb').read()
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basebin = open(baseimg, 'rb').read()
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if len(mybin) != len(basebin):
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print("Modified ROM has different size...")
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exit(1)
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def search_map(rom_addr):
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ram_offset = None
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last_ram = 0
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last_rom = 0
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last_fn = '<start of rom>'
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last_file = '<no file>'
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prev_line = ''
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with open(mymap) as f:
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for line in f:
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if 'load address' in line:
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# Example: ".boot 0x0000000004000000 0x1000 load address 0x0000000000000000"
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if 'noload' in line or 'noload' in prev_line:
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ram_offset = None
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continue
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ram = int(line[16:16+18], 0)
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rom = int(line[59:59+18], 0)
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ram_offset = ram - rom
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continue
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prev_line = line
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if ram_offset is None or '=' in line or '*fill*' in line or ' 0x' not in line:
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continue
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ram = int(line[16:16+18], 0)
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rom = ram - ram_offset
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fn = line.split()[-1]
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if '0x' in fn:
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ram_offset = None
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continue
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if rom > rom_addr or (rom_addr & 0x80000000 and ram > rom_addr):
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return 'in {} (ram 0x{:08x}, rom 0x{:x}, {})'.format(last_fn, last_ram, last_rom, last_file)
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last_ram = ram
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last_rom = rom
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last_fn = fn
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if '/' in fn:
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last_file = fn
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return 'at end of rom?'
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def parse_map(fname):
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ram_offset = None
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cur_file = '<no file>'
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syms = {}
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prev_sym = None
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prev_line = ''
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with open(fname) as f:
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for line in f:
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if 'load address' in line:
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if 'noload' in line or 'noload' in prev_line:
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ram_offset = None
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continue
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ram = int(line[16:16+18], 0)
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rom = int(line[59:59+18], 0)
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ram_offset = ram - rom
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continue
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prev_line = line
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if ram_offset is None or '=' in line or '*fill*' in line or ' 0x' not in line:
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continue
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ram = int(line[16:16+18], 0)
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rom = ram - ram_offset
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fn = line.split()[-1]
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if '0x' in fn:
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ram_offset = None
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elif '/' in fn:
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cur_file = fn
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else:
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syms[fn] = (rom, cur_file, prev_sym, ram)
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prev_sym = fn
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return syms
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def map_diff():
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map1 = parse_map(mymap)
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map2 = parse_map(basemap)
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min_ram = None
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found = None
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for sym, addr in map1.items():
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if sym not in map2:
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continue
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if addr[0] != map2[sym][0]:
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if min_ram is None or addr[0] < min_ram:
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min_ram = addr[0]
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found = (sym, addr[1], addr[2])
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if min_ram is None:
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return False
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else:
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print()
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print("Map appears to have shifted just before {} ({}) -- in {}?".format(found[0], found[1], found[2]))
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if found[2] is not None and found[2] not in map2:
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print()
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print("(Base map file {} out of date due to renamed symbols, so result may be imprecise.)".format(basemap))
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return True
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def hexbytes(bs):
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return ":".join("{:02x}".format(c) for c in bs)
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# For convenience, allow `./first-diff.py <ROM addr | RAM addr | function name>`
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# to do a symbol <-> address lookup. This should really be split out into a
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# separate script...
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if args:
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try:
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addr = int(args[0], 0)
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print(args[0], "is", search_map(addr))
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except ValueError:
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m = parse_map(mymap)
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try:
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print(args[0], "is at position", hex(m[args[0]][0]), "in ROM,", hex(m[args[0]][3]), "in RAM")
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except KeyError:
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print("function", args[0], "not found")
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exit()
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found_instr_diff = None
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diffs = 0
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shift_cap = 1000
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for i in range(24, len(mybin), 4):
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# (mybin[i:i+4] != basebin[i:i+4], but that's slightly slower in CPython...)
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if diffs <= shift_cap and (mybin[i] != basebin[i] or mybin[i+1] != basebin[i+1] or mybin[i+2] != basebin[i+2] or mybin[i+3] != basebin[i+3]):
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if diffs == 0:
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print("First difference at ROM addr " + hex(i) + ", " + search_map(i))
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print("Bytes:", hexbytes(mybin[i:i+4]), 'vs', hexbytes(basebin[i:i+4]))
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diffs += 1
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if found_instr_diff is None and mybin[i] >> 2 != basebin[i] >> 2:
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found_instr_diff = i
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if diffs == 0:
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print("No differences!")
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exit()
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definite_shift = (diffs > shift_cap)
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if not definite_shift:
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print(str(diffs) + " differing word(s).")
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if diffs > 100:
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if found_instr_diff is not None:
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i = found_instr_diff
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print("First instruction difference at ROM addr " + hex(i) + ", " + search_map(i))
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print("Bytes:", hexbytes(mybin[i:i+4]), 'vs', hexbytes(basebin[i:i+4]))
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if lang == 'eu':
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print("Shifted ROM, as expected.")
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else:
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if not os.path.isfile(basemap):
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if definite_shift:
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print("Tons of differences, must be a shifted ROM.")
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print("To find ROM shifts, copy a clean .map file to " + basemap + " and rerun this script.")
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exit()
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if not map_diff():
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print("No ROM shift{}.".format(" (!?)" if definite_shift else ""))
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