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fakuivan
Newbie cheater
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Joined: 27 Dec 2018
Posts: 17
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 Posted: Sun Jan 06, 2019 9:35 pm Post subject: Lua: Find if memory address is writable by the game |
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I made the following script, that works similarly to a pointerscan, except it's not limited to a static address as the base address for the pointer (the base address is arbitrary).
To filter potential pointers on the struct I made a basic "non zero pointer" filter and implemented it in ``usableAddress``, while this cuts down somehow on the bloat, it still interprets anything that is not zero as a possible struct, even if the game can't access it.
I wasn't able to find any functions in the Lua API that could suggest checking if a memory location is accesible by the game. Is such thing possible to implement in Lua? how so?
| Code: |
function scanTree(address, maxOffset, comparator, structValidator, maxDepth)
print(string.format(
"scanning for address 0x%X with max offset 0x%X and max depth %d",
address, maxOffset, maxDepth))
local offsetTree = {}
address = getAddress(address)
for currentOffset = 0, maxOffset, 1 do
local currentAddress = address + currentOffset
if comparator(currentAddress) then
print(string.format("Offset found at 0x%X", currentOffset))
offsetTree[currentOffset] = true
end
if maxDepth > 0 then
local nextNode = readPointer(currentAddress)
if structValidator(nextNode) then
-- If this is a valid offset, then we'll overwrite it
offsetTree[currentOffset] = scanTree(nextNode,
maxOffset,
comparator,
structValidator,
maxDepth - 1)
end
end
end
return offsetTree
end
function floatMemComparator(address, value, radius)
local toCompare = readFloat(address)
if not toCompare then return false else
if compareFloat(toCompare, value, radius) then return true
else return false end
end
end
function usableAddress(address)
return not (address == 0 or address == nil)
end
function compareFloat(float1, float2, radius)
local lower_limit = float2 - radius
local upper_limit = float2 + radius
if float1 <= upper_limit and float1 >= lower_limit then
return true
end
return false
end
scanTree(getAddress("21437861688"),
4000,
function(address) return floatMemComparator(address, 29.2, 0.1) end,
usableAddress,
1)
print("Finished")
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Dark Byte
Site Admin
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Joined: 09 May 2003
Posts: 25804
Location: The netherlands
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| Posted: Mon Jan 07, 2019 2:04 am Post subject: |
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not really(i'll see about adding a getMemoryRanges function) ,but if readFloat (or readInteger) returns nil instead of 0 then the address was inaccessible. (all bytes in that 4kb range would be inaccessible then)
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fakuivan
Newbie cheater
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Joined: 27 Dec 2018
Posts: 17
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| Posted: Wed Jan 09, 2019 12:56 am Post subject: |
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I added a ``readBytes(address, 1) == nil`` to the checks, it's much quicker now, thanks Dark Byte!. Here's the complete script
(link on the "File Comment", stupid url blockers, all they accomplish is to make people mangle urls)
I really hope something like this gets added to CE's pointerscan (this method is very crude and slow compared to something written in C), as the limitation to just use static addresses seems quite artificial to me.
| Description: |
| https://gist.github.com/fakuivan/61b3bb9e59d8ac724cedf1e8910de8e3 |
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| Filesize: |
13.84 KB |
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29100 Time(s) |
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Dark Byte
Site Admin
Reputation: 470
Joined: 09 May 2003
Posts: 25804
Location: The netherlands
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| Posted: Wed Jan 09, 2019 1:26 am Post subject: |
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the pointerscan has an option to say that the base addresss must be in a static address or not, and also lets you specify the range if you like
then there's also the structure spider and compare
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Last edited by Dark Byte on Wed Jan 09, 2019 2:56 am; edited 1 time in total |
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fakuivan
Newbie cheater
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Joined: 27 Dec 2018
Posts: 17
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| Posted: Wed Jan 09, 2019 1:39 am Post subject: |
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| Would you mind sharing a screenshot of the option to specify a non static base address? I can't seem to find it.
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Dark Byte
Site Admin
Reputation: 470
Joined: 09 May 2003
Posts: 25804
Location: The netherlands
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| Posted: Wed Jan 09, 2019 2:53 am Post subject: |
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Deselect
| Code: |
advanced options->"Only find paths with a static address"
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or check advanced options->"Base address must be in range" and give the range you accept as base (can be a non-static range)
_________________
Do not ask me about online cheats. I don't know any and wont help finding them.
Like my help? Join me on Patreon so i can keep helping |
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