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dopeness
How do I cheat?
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Joined: 28 Jun 2021
Posts: 2
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 Posted: Mon Jun 28, 2021 12:55 am Post subject: Weird health values |
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Hi, I found my health in a game I'm playing, but it's represented as some weird value.
I found a thread that was similar to my problem:
cheatengineDOTorg/forum/viewtopic.php?t=563878&sid=d3a74afc916ae560323c8051f16811d5
(new acc, i can't post links, so i put DOT in the link, replace with '.')
But my values are a bit different.
Me at 969 health:
4 bytes: 127008768
8 bytes: 12389691845365596160
float: 2.196763843E-34
double: -4.98238486090369E-97
Now, me at 775 health:
4 bytes: 101580800
8 bytes: 12389691845340168192
float: 2.670723165E-35
double: -4.98238483447028E-97
I don't see how I can convert these values to the correct HP I see on the screen. Anyone have any ideas (owner of this site?  )
Also, is there a discord or something??
Thanks guys, hope someone has some ideas/insight. |
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ParkourPenguin
I post too much
 Reputation: 152
Joined: 06 Jul 2014
Posts: 4710
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| Posted: Mon Jun 28, 2021 1:34 am Post subject: |
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It's the upper half of the 4-byte value bit shifted left once.
| Code: | 127008768 (dec)
07920000 (hex)
0792 (upper word)
03c9 (shift right)
969 (decimal)
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This would be an easy custom type to make even in assembly. (simple integer, 2-byte value, custom behaviour is a bit shift)
_________________
I don't know where I'm going, but I'll figure it out when I get there. |
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dopeness
How do I cheat?
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Joined: 28 Jun 2021
Posts: 2
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| Posted: Mon Jun 28, 2021 1:53 am Post subject: |
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Wow, can you direct me to a link where I can learn more about how you figured that out? IE: what do these keywords mean?
'upper word'
'shift right'
Thanks by the way. |
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ParkourPenguin
I post too much
Reputation: 152
Joined: 06 Jul 2014
Posts: 4710
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| Posted: Mon Jun 28, 2021 11:28 am Post subject: |
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A 4-byte integer value consists of 4 bytes. These bytes are typically stored with the least significant byte first (aka little endian). e.g.:
| Code: | 1234 (decimal - base 10)
4D2 (hexadecimal - base 16)
D2 04 00 00 (array of bytes)
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A word is a unit of measurement indicating how many bytes some primitive data consists of. Decades ago when 16-bit code was commonplace, the base unit "word" (or "single word") was defined to 2 bytes (16 bits). A doubleword (aka dword) is 4 bytes, quadword (aka qword) 8 bytes, doublequadword (dqword) 16 bytes...
A dword can be broken down into two words: the less significant half is the lower word, and the more significant half is the upper word. i.e.:
| Code: | 127008768 (decimal - base 10)
07920000 (hexadecimal - base 16)
00 00 92 07 (array of bytes)
92 07 (more significant half)
792 (upper word - base 16)
1938 (upper word - base 10) |
A shift is just shifting the bits of some value left or right by a certain amount.
| Code: | 1938 (word, base 10)
0000011110010010 (base 2)
0000001111001001 (shift right 1)
969 (word, base 10) |
Due to how binary works, shifting can be seen as floor division or multiplication by some integer power of 2.
Edit: in hindsight you could also just shift it right 17 times and get the same result (i.e. 127008768 >> 17 == 969). Which way is "correct" depends on how the game accesses that data.
_________________
I don't know where I'm going, but I'll figure it out when I get there. |
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