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