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#!/usr/bin/python3
import os
import sys
import struct
import argparse
import re
from overlayhelpers.filemap import GetFromVRam
ICHAIN_MACROS = [
'ICHAIN_U8',
'ICHAIN_S8',
'ICHAIN_U16',
'ICHAIN_S16',
'ICHAIN_U32',
'ICHAIN_S32',
'ICHAIN_F32',
'ICHAIN_F32_DIV1000',
'ICHAIN_VEC3F',
'ICHAIN_VEC3F_DIV1000',
'ICHAIN_VEC3S',
]
Z64_ACTOR_PATH = "../include/z64actor.h"
def get_rom_address(offset):
if offset.startswith("D_"):
offset = offset[2:]
offset = int(offset, 16)
if offset >= 0x80000000:
result = GetFromVRam(offset)
offset = result.vrom.start + result.offset
return hex(offset)
def get_actor_var_names():
in_actor = False
actor_vars = {}
with open(os.path.dirname(os.path.realpath(__file__)) + "/" + Z64_ACTOR_PATH) as actor_h:
for line in actor_h:
if in_actor:
if "}" in line:
# Reached the end of the actor struct so break out
break
# Parse out the memory address (from the comment) and the variable name
regex = r'.*\/\* (.*) \*\/\s+(struct)?\s*.+\s+(.+);.*'
actor_var_info = re.match(regex, line)
if actor_var_info:
# Strip off the 0x0* part and store it
new_var_index = re.sub('0x0*', '', actor_var_info[1])
actor_vars[new_var_index] = actor_var_info[3]
elif "typedef struct Actor {" in line:
# Found the Actor struct
in_actor = True
return actor_vars
def main():
parser = argparse.ArgumentParser(description='Decompiles an InitChain')
parser.add_argument('filename', help='ROM file path')
parser.add_argument('offset', help='ROM offset or symbol of an InitChain')
parser.add_argument('--names', action="store_true", help='Retrieve variable names from the actor struct')
args = parser.parse_args()
# Get the ROM address, if the offset is already a ROM address it will just be returned.
args.offset = get_rom_address(args.offset)
romOff = int(args.offset, 16)
try:
with open(args.filename, 'rb') as f:
romData = f.read()
except IOError:
print('failed to read file ' + args.filename)
sys.exit(1)
print ('static InitChainEntry sInitChain[] = {')
if args.names:
actor_variable_names = get_actor_var_names()
while True:
entry = struct.unpack('>I', romData[romOff:romOff+4])[0]
romOff += 4
cont = entry >> 31
t = (entry >> 27) & 0xF
offset = ((entry) >> 16) & 0x7FF
value = (entry) & 0xFFFF
if value >= 0x8000 and not ICHAIN_MACROS[t].startswith('ICHAIN_U'):
value -= 0x10000
var_name = '{0:X}'.format(offset)
if args.names and var_name in actor_variable_names:
var_name = actor_variable_names[var_name]
else:
var_name = "unk_" + var_name
print(' {0}({1}, {2}, {3}),'.format(ICHAIN_MACROS[t], var_name, value, ('ICHAIN_CONTINUE' if cont == 1 else 'ICHAIN_STOP')))
if cont == 0:
break
print ('};')
if __name__ == "__main__":
main()
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