| View previous topic :: View next topic |
| Author |
Message |
relentlesstech
Cheater
![]() Reputation: 1
Joined: 02 Sep 2018
Posts: 44
Location: Rhode Island, USA
|
 Posted: Sat Sep 29, 2018 6:40 am Post subject: [ SOLVED ] How to freeze/manipulate a text-based timer? |
 |
|
I am having an extremely difficult time trying to freeze (or just manipulate in general) the timer in the game "V Rally 4" (Single Player) - After days of changed value/increase/decrease/etc, I finally figured out the timer value is stored as unicode text - Not having ever dealt with text-based timers before, I am at a loss as to how I would be able to manipulate the timer - I tried NOP'ing the instructions, but it causes an instant crash. Anyone have any thoughts on my dilemma?
I have a very 'basic' knowledge of Cheat Engine/ASM, so if possible try to put it in 'laymans terms' LOL
This is the opcode group that influences the timer value:
| Code: | VCRUNTIME140.memcpy+5F - C3 - ret
VCRUNTIME140.memcpy+60 - 0F10 02 - movups xmm0,[rdx]
VCRUNTIME140.memcpy+63 - 42 0F10 4C 02 F0 - movups xmm1,[rdx+r8-10]
VCRUNTIME140.memcpy+69 - 0F11 01 - movups [rcx],xmm0
VCRUNTIME140.memcpy+6C - 42 0F11 4C 01 F0 - movups [rcx+r8-10],xmm1
VCRUNTIME140.memcpy+72 - 48 8B C1 - mov rax,rcx
VCRUNTIME140.memcpy+75 - C3 - ret |
_________________
.: Cheat Engine N00b in Progress :.
I'll earn my avatar someday ...
Last edited by relentlesstech on Mon Oct 08, 2018 4:15 am; edited 1 time in total |
|
| Back to top |
|
 |
FreeER
Grandmaster Cheater Supreme
![]() Reputation: 53
Joined: 09 Aug 2013
Posts: 1091
|
| Posted: Sat Sep 29, 2018 8:13 am Post subject: |
|
|
memcpy is a generic memory copy function in the visual C runtime / standard library. Backtrace to see what's calling it (and maybe what's calling that etc.) and modify that.
_________________
|
|
| Back to top |
|
|
ParkourPenguin
I post too much
 Reputation: 140
Joined: 06 Jul 2014
Posts: 4300
|
| Posted: Sat Sep 29, 2018 8:21 am Post subject: |
|
|
That's in memcpy. Modifying anything in there would be ill-advised. Looking at the caller might give more interesting results, but knowing what to do with that might be difficult for a beginner.
Does changing the string actually change the value of the timer? If it's only changing what the timer appears to be, then you didn't find the right value.
_________________
I don't know where I'm going, but I'll figure it out when I get there. |
|
| Back to top |
|
|
relentlesstech
Cheater
![]() Reputation: 1
Joined: 02 Sep 2018
Posts: 44
Location: Rhode Island, USA
|
| Posted: Sat Sep 29, 2018 3:39 pm Post subject: |
|
|
| ParkourPenguin wrote: |
Does changing the string actually change the value of the timer? If it's only changing what the timer appears to be, then you didn't find the right value. |
It does change the timer in-game when I change the value in CE, but it lasts about half a second, then the game crashes - I spent days trying to find anything timer related, and this was the only thing I was able to find, in any type ...
_________________
.: Cheat Engine N00b in Progress :.
I'll earn my avatar someday ... |
|
| Back to top |
|
|
relentlesstech
Cheater
![]() Reputation: 1
Joined: 02 Sep 2018
Posts: 44
Location: Rhode Island, USA
|
| Posted: Sun Sep 30, 2018 5:27 pm Post subject: Figured it out! |
|
|
The answer was backtracing, and LOTS of it - There were several 'dummy' routines that I had to sift though, and in the end the value for the timer was 4 byte, in ms :-/
_________________
.: Cheat Engine N00b in Progress :.
I'll earn my avatar someday ... |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
