mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-09-09 09:51:34 -07:00
269 lines
7.9 KiB
Python
269 lines
7.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
Find shared functions between red/crystal.
|
|
"""
|
|
|
|
from crystal import (
|
|
get_label_from_line,
|
|
get_address_from_line_comment,
|
|
AsmSection,
|
|
direct_load_rom,
|
|
direct_load_asm,
|
|
)
|
|
|
|
from romstr import (
|
|
RomStr,
|
|
AsmList,
|
|
)
|
|
|
|
def load_rom(path):
|
|
"""
|
|
Load a ROM file into an abbreviated RomStr object.
|
|
"""
|
|
return direct_load_rom(filename=path)
|
|
|
|
def load_asm(path):
|
|
"""
|
|
Load source ASM into an abbreviated AsmList object.
|
|
"""
|
|
return direct_load_asm(filename=path)
|
|
|
|
def findall_iter(sub, string):
|
|
# url: http://stackoverflow.com/a/3874760/687783
|
|
|
|
def next_index(length):
|
|
index = 0 - length
|
|
while True:
|
|
index = string.find(sub, index + length)
|
|
yield index
|
|
|
|
return iter(next_index(len(sub)).next, -1)
|
|
|
|
class Address(int):
|
|
"""
|
|
A simple int wrapper to take 0xFFFF and $FFFF addresses.
|
|
"""
|
|
|
|
def __new__(cls, x=None, *args, **kwargs):
|
|
if type(x) == str:
|
|
if "$" in x:
|
|
x = x.replace("$", "0x")
|
|
|
|
if "0x" in str:
|
|
instance = int.__new__(cls, int(x, base=16), *args, **kwargs)
|
|
else:
|
|
msg = "Address.__new__ doesn't know how to parse this string"
|
|
raise Exception, msg
|
|
else:
|
|
instance = int.__new__(cls, x, *args, **kwargs)
|
|
|
|
return instance
|
|
|
|
found_blobs = []
|
|
|
|
class BinaryBlob(object):
|
|
"""
|
|
Store a label, line number, and addresses of a function from Pokémon Red.
|
|
|
|
These details can be used to determine whether or not the function was
|
|
copied into Pokémon Crystal.
|
|
"""
|
|
|
|
start_address = None
|
|
end_address = None
|
|
label = None
|
|
line_number = None
|
|
bytes = None
|
|
bank = None
|
|
debug = False
|
|
locations = None
|
|
|
|
def __init__(self, start_address=None, end_address=None, label=None, \
|
|
debug=None, line_number=None):
|
|
if not isinstance(start_address, Address):
|
|
start_address = Address(start_address)
|
|
if not isinstance(end_address, Address):
|
|
end_address = Address(end_address)
|
|
|
|
assert label != None, "label can't be none"
|
|
assert isinstance(label, str), "label must be a string"
|
|
assert line_number != None, "line_number must be provided"
|
|
|
|
self.start_address = start_address
|
|
self.end_address = end_address
|
|
self.label = label
|
|
self.line_number = line_number
|
|
self.bytes = []
|
|
self.locations = []
|
|
self.bank = start_address / 0x4000
|
|
|
|
if debug != None:
|
|
self.debug = debug
|
|
|
|
self.parse_from_red()
|
|
# self.find_in_crystal()
|
|
self.find_by_first_bytes()
|
|
|
|
def __repr__(self):
|
|
"""
|
|
A beautiful poem.
|
|
"""
|
|
|
|
r = "BinaryBlob("
|
|
r += "label=\""+self.label+"\", "
|
|
r += "start_address="+hex(self.start_address)+", "
|
|
r += "size="+str(self.end_address - self.start_address)+", "
|
|
locnum = len(self.locations)
|
|
if locnum == 1:
|
|
r += "located="+hex(self.locations[0])
|
|
elif locnum <= 5:
|
|
r += "located="+str([hex(x) for x in self.locations])
|
|
else:
|
|
r += "located="+str(locnum)
|
|
r += ")"
|
|
|
|
return r
|
|
|
|
def __str__(self):
|
|
return self.__repr__()
|
|
|
|
def parse_from_red(self):
|
|
"""
|
|
Read bytes from Pokémon Red and stores them.
|
|
"""
|
|
|
|
self.bytes = redrom[self.start_address : self.end_address + 1]
|
|
|
|
def pretty_bytes(self):
|
|
"""
|
|
Returns a better looking range of bytes.
|
|
"""
|
|
|
|
bytes = redrom.interval(self.start_address, \
|
|
self.end_address - self.start_address, \
|
|
strings=False, debug=True)
|
|
|
|
return bytes
|
|
|
|
def find_in_crystal(self):
|
|
"""
|
|
Check whether or not the bytes appear in Pokémon Crystal.
|
|
"""
|
|
|
|
finditer = findall_iter(self.bytes, cryrom)
|
|
self.locations = [match for match in finditer]
|
|
|
|
if len(self.locations) > 0:
|
|
found_blobs.append(self)
|
|
|
|
if self.debug:
|
|
print self.label + ": found " + str(len(self.locations)) + " matches."
|
|
|
|
def find_by_first_bytes(self):
|
|
"""
|
|
Find this blob in Crystal based on the first n bytes.
|
|
"""
|
|
|
|
# how many bytes to match
|
|
first_n = 3
|
|
|
|
# no match
|
|
if len(self.bytes) <= first_n:
|
|
return
|
|
|
|
finditer = findall_iter(self.bytes[0:first_n], cryrom)
|
|
self.locations = [match for match in finditer]
|
|
|
|
# filter out locations that suck
|
|
self.locations = [i for i in self.locations if abs(self.start_address - i) <= 0x8000]
|
|
|
|
if len(self.locations) > 0:
|
|
found_blobs.append(self)
|
|
|
|
if self.debug:
|
|
print self.label + ": found " + str(len(self.locations)) + " matches."
|
|
|
|
pokecrystal_rom_path = "../baserom.gbc"
|
|
pokecrystal_src_path = "../main.asm"
|
|
pokered_rom_path = "../pokered-baserom.gbc"
|
|
pokered_src_path = "../pokered-main.asm"
|
|
|
|
cryrom = load_rom(pokecrystal_rom_path)
|
|
crysrc = load_asm(pokecrystal_src_path)
|
|
redrom = load_rom(pokered_rom_path)
|
|
redsrc = load_asm(pokered_src_path)
|
|
|
|
def scan_red_asm(bank_stop=3, debug=True):
|
|
"""
|
|
Scan the ASM from Pokémon Red. Finds labels and objects. Does things.
|
|
|
|
Uses get_label_from_line and get_address_from_line_comment.
|
|
"""
|
|
|
|
# whether or not to show the lines from redsrc
|
|
show_lines = False
|
|
|
|
line_number = 0
|
|
current_bank = 0
|
|
|
|
current_label = None
|
|
latest_label = "ignore me"
|
|
current_start_address = None
|
|
latest_start_address = 0
|
|
latest_line = ""
|
|
|
|
for line in redsrc:
|
|
if debug and show_lines:
|
|
print "processing a line from red: " + line
|
|
|
|
if line[0:7] == "SECTION":
|
|
thing = AsmSection(line)
|
|
current_bank = thing.bank_id
|
|
|
|
if debug:
|
|
print "scan_red_asm: switching to bank " + str(current_bank)
|
|
|
|
elif line[0:6] != "INCBIN":
|
|
if ":" in line and not ";XXX:" in line and not " ; XXX:" in line:
|
|
current_label = get_label_from_line(line)
|
|
current_start_address = get_address_from_line_comment(line, \
|
|
bank=current_bank)
|
|
|
|
if current_label != None and current_start_address != None and latest_start_address != None \
|
|
and current_start_address != 0 and current_start_address != latest_start_address \
|
|
and (current_start_address - latest_start_address) > 1:
|
|
if latest_label != None:
|
|
if latest_label not in ["Char52", "PokeCenterSignText", "DefaultNamesPlayer", "Unnamed_6a12"]:
|
|
blob = BinaryBlob(label=latest_label, \
|
|
start_address=latest_start_address, \
|
|
end_address=current_start_address, \
|
|
line_number=line_number)
|
|
|
|
if debug:
|
|
print "Created a new blob: " + str(blob) + " from line: " + str(latest_line)
|
|
|
|
latest_label = current_label
|
|
latest_start_address = current_start_address
|
|
latest_line = line
|
|
|
|
line_number += 1
|
|
|
|
if current_bank == bank_stop:
|
|
if debug:
|
|
print "scan_red_asm: stopping because current_bank >= " + \
|
|
str(bank_stop) + " (bank_stop)"
|
|
|
|
break
|
|
|
|
scan_red_asm(bank_stop=3)
|
|
|
|
print "================================"
|
|
|
|
for blob in found_blobs:
|
|
print blob
|
|
|
|
print "Found " + str(len(found_blobs)) + " possibly copied functions."
|
|
|
|
print [hex(x) for x in found_blobs[10].locations]
|
|
|