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extract_rom_data.py

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extract_rom_data.py

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rom_start = 0x08000000
end_of_code = 0x080ce438
end_of_data = 0x08e7f1f4
addresses = set()
with open('asm/code.s') as code:
for line in code.readlines():
line = line.strip()
if ".4byte 0x08" in line:
address = int(line.split("0x0")[1], 16)
if address >= end_of_code and address < end_of_data:
addresses.add(address)
addresses_with_size = []
sorted_addresses = sorted(addresses)
def upper_addr(addr):
return "0x" + hex(addr).split('0x')[1].upper()
def format_memory_addr(addr):
return "0x0" + hex(addr).split("0x")[1].upper()
def to_var_name(addr):
without_hex = addr.split("0x")[1]
return f"gUnknown_{without_hex}"
for i in range(len(sorted_addresses)):
address = sorted_addresses[i]
if i + 1 < len(sorted_addresses):
next_address = sorted_addresses[i + 1]
else:
next_address = end_of_data
addresses_with_size.append((address, format_memory_addr(address), upper_addr(next_address - address)))
summed = 0
with open("data/new_data.s", "w") as data_file:
data_file.write(' .section .rodata\n')
data_file.write('\n')
for raw_addr, addr, size in addresses_with_size:
summed += int(size, 16)
var = to_var_name(addr)
data_file.write(f""" .global {var}
{var}:
.incbin "data/baserom.gba", 0x{f"{(raw_addr - rom_start):08x}".upper()}, {size}
""")
print(hex(summed))
with open("asm/new_code.s", "w") as new_rom:
existing_code = "".join(open("asm/code.s").readlines())
for _, addr, __ in addresses_with_size:
var = to_var_name(addr)
existing_code = existing_code.replace(addr, to_var_name(addr))
new_rom.write(existing_code)
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