A simple tool that patches out the code that forces any of the Halo 3 tools to close when it hits a failed assertion.

h3ek_tools_assertion_exit_patch.py

DESCRIPTION = '''
A simple tool that patches out the code that forces any
of the Halo 3 tools to close when it hits a failed assertion.

Should work for all H3EK exes except the "fast" versions.

Licensed under GPLv3 https://www.gnu.org/licenses/gpl-3.0.en.html

Made by Shelly Herself!
Socials:
https://twitter.com/Shelly_Herself
https://github.com/gbMichelle
Donations are also welcome :)
https://ko-fi.com/shellyherself
https://paypal.me/gbmichelle
'''

print(DESCRIPTION)
print("""
#################################################
""")

import sys
import glob
from traceback import format_exc
args = sys.argv[1:]

if len(args) < 1:
    print("Error: User didn't supply any exe paths to patch")

for arg in args:
    print("Attempting to open", arg, "for patching")
    with open(arg, 'rb+') as file:
        # Read file into string
        s = file.read()
        # Search for code of the function that exits the game
        i = s.find(b'\x48\x83\xEC\x48\x0F\x10\x01\xF2\x0F\x10\x49\x10\x48\x8D\x4C\x24\x20\x0F\x11\x44\x24\x20\x48\x89\x54\x24\x20\xF2\x0F\x11\x4C\x24\x30\xE8')
        s = bytearray(s)

        # Patch if found
        if i != -1:
            print("SUCCESS: Found the assertion exit code. Patching it out.")
            s[i] = (b'\xC3')[0]
        # Cry if not found
        else:
            print("ERROR: Couldn't find assertion exit code in given binary. So I can't patch it out.")
            exit(1)

        # Empty the file
        file.seek(0)
        file.truncate(0)

        # Write new contents to the file
        file.write(s)
        file.flush()