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Update gcmtool.py

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fix bugs
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tmpz23 2022-01-13 17:30:45 +01:00 committed by GitHub
parent 847c3ed2bb
commit 0d44a0ca97
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1 changed files with 11 additions and 12 deletions
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gcmtool.py
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@ -3,7 +3,7 @@ from pathlib import Path
import logging
__version__ = "0.0.6"
__version__ = "0.0.7"
__author__ = "rigodron, algoflash, GGLinnk"
__license__ = "MIT"
__status__ = "developpement"
@ -19,6 +19,7 @@ BOOTBIN_FSTOFFSET_OFFSET = 0x424
BOOTBIN_FSTLEN_OFFSET = 0x428
BI2BIN_LEN = 0x2000
DOL_HEADER_LEN = 0x100
APPLOADER_HEADER_LEN = 0x20
ISO_APPLOADER_OFFSET = 0x2440
ISO_APPLOADERSIZE_OFFSET = 0x2454
######################################################################
@ -28,10 +29,10 @@ ISO_APPLOADERSIZE_OFFSET = 0x2454
# add info on unused randoms bytes on initial DVD iso file
# -> that's why repack iso is different from initial iso
######################################################################
def align(offset:int, align:int):
def align_offset(offset:int, align:int):
if offset % align != 0:
offset += align - (offset % align)
return align
return offset
class Node:
@ -118,7 +119,7 @@ class FstTree:
# Needed to know where we can begin to write files
def __get_fst_length(self):
self.__generate_nameblock_length()
return align(self.__count_childs(self.__root_node)*12 + 12 + self.__nameblock_length, self.__align)
return align_offset(self.__count_childs(self.__root_node)*12 + 12 + self.__nameblock_length, self.__align)
def __generate_nameblock_length(self, node:Node = None):
if node == None:
node = self.__root_node
@ -160,7 +161,7 @@ class FstTree:
else:
node.set_offset(self.__current_file_offset)
self.__fst_block += node.format()
self.__current_file_offset = align(self.__current_file_offset + node.size(), self.__align)
self.__current_file_offset = align_offset(self.__current_file_offset + node.size(), self.__align)
def get_fst(self):
self.__current_file_offset += self.__get_fst_length()
self.__prepare()
@ -174,11 +175,12 @@ class FstTree:
class Dol:
DOLHEADER_SECTIONLENTABLE_OFFSET = 0x90
# Get total length using the sum of the 18 sections length and dol header length
def get_dol_len(self, dolheader_data:bytes):
dol_len = DOL_HEADER_LEN
for i in range(18):
dol_len += int.from_bytes(dolheader_data[0x90+i*4:0x90+(i+1)*4], "big", signed=False)
dol_len += int.from_bytes(dolheader_data[Dol.DOLHEADER_SECTIONLENTABLE_OFFSET+i*4:Dol.DOLHEADER_SECTIONLENTABLE_OFFSET+(i+1)*4], "big", signed=False)
return dol_len
@ -191,14 +193,11 @@ class GCM:
raise Exception("Invalid DVD format - this tool is for ISO/GCM files")
bi2bin_data = iso_file.read(BI2BIN_LEN)
# https://www.gc-forever.com/wiki/index.php?title=Apploader
# -> Full apploader size is sum of size and trailerSize, rounded up to 32 bytes.
iso_file.seek(ISO_APPLOADERSIZE_OFFSET)
size = int.from_bytes(iso_file.read(4), "big", signed=False)
trailerSize = int.from_bytes(iso_file.read(4), "big", signed=False)
# Dolphin Emulator add 32 Null bytes at the end of the extracted apploader.img
apploader_size = size + trailerSize + 32
apploader_size = APPLOADER_HEADER_LEN + size + trailerSize
iso_file.seek(ISO_APPLOADER_OFFSET)
apploaderimg_data = iso_file.read(apploader_size)
@ -353,12 +352,12 @@ class GCM:
root_path = folder_path / "root"
sys_path = folder_path / "sys"
with (sys_path / "boot.bin").open("rb+") as bootbin_file:
dol_offset = align(ISO_APPLOADER_OFFSET + (sys_path / "apploader.img").stat().st_size, align)
dol_offset = align_offset(ISO_APPLOADER_OFFSET + (sys_path / "apploader.img").stat().st_size, align)
logging.info(f"Patching sys/boot.bin offset 0x{BOOTBIN_DOLOFFSET_OFFSET:x} with new dol offset (0x{dol_offset:x})")
bootbin_file.seek(BOOTBIN_DOLOFFSET_OFFSET)
bootbin_file.write(dol_offset.to_bytes(4, "big"))
fst_offset = align(dol_offset + (sys_path / "boot.dol").stat().st_size, align)
fst_offset = align_offset(dol_offset + (sys_path / "boot.dol").stat().st_size, align)
logging.info(f"Patching sys/boot.bin offset 0x{BOOTBIN_FSTOFFSET_OFFSET:x} with new fst offset (0x{fst_offset:x})")
bootbin_file.seek(BOOTBIN_FSTOFFSET_OFFSET)
bootbin_file.write(fst_offset.to_bytes(4, "big"))