BUG related to editing arm64 instructions

[Kingofslavs]

I tried to transfer my mod menu to the GameGuardian script but encountered a bug,
Through the gameguardian script I change the instruction, it changes and this becomes visible but in fact nothing changes in the game the results are not visible, at the same time when I change the same instruction through the mod menu my changed instruction starts to work! I can give a link to a video showing this bug if you ask me.

[CmP]

If this happens on emulator with binary translation (Bluestacks, LDPlayer, MEmu, etc) and instructions that are modified have been executed a bunch of times before modification, then this is expected. It's not a bug in GG, it writes memory successfully, behavior will be same regardless of which external tool is used to write memory (as long as method is same, see PTRACE_POKEDATA in ptrace man page). Possible workaround is to apply modification early on, before target instructions have been executed.

[Kingofslavs]

thanks for the answer, I understood what the problem was, the game was launched through an emulator on a PC because the mod menu was loaded through arm64_v8a, the arm instructions appeared but they are not real, they were created by the system library libhoudini.so, so this is only a simulation of instructions, this library ensures compatibility of arm applications on the x86-64 architecture

[HorridModz]

On 4/3/2025 at 3:45 PM, CmP said:

If this happens on emulator with binary translation (Bluestacks, LDPlayer, MEmu, etc) and instructions that are modified have been executed a bunch of times before modification, then this is expected. It's not a bug in GG, it writes memory successfully, behavior will be same regardless of which external tool is used to write memory (as long as method is same, see PTRACE_POKEDATA in ptrace man page). Possible workaround is to apply modification early on, before target instructions have been executed.

Wow, I never knew that! This explains why so many hex patches have to be run before a game has finished loading. I've always wondered why - that makes so much sense.