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Calling IsBadReadPtr from Lua?

 
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predprey
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PostPosted: Thu Jul 21, 2016 8:16 am    Post subject: Calling IsBadReadPtr from Lua? Reply with quote
I would like to set up a breakpoint condition with this windows api function.
I figured out how to get the address of the function with getAddress("KERNEL32.IsBadReadPtr") but I have no idea how cast the integer to a function i can use with synchronize()?

so is this the correct way to do it, by using synchronize()?
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ParkourPenguin
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PostPosted: Thu Jul 21, 2016 10:57 am    Post subject: Reply with quote
You could achieve the same result with this:
Code:
readInteger(address) ~= nil

Regardless, synchronize() is documented in main.lua:
Quote:
Called from inside the thread. This will cause the tread to get the main thread to execute the given function and wait for it to finish.
Usually for GUI access

So it's not what you want. Use the executeCode function for executing assembly code.
Code:
autoAssemble([[globalalloc(checkPtr,128)
checkPtr:
push 4
push [esp+8]
call kernel32.IsBadReadPtr
ret 4]])

executeCode("checkPtr", 0)  -- 0 = false (valid ptr), 1 = true (bad ptr)

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predprey
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PostPosted: Thu Jul 21, 2016 11:45 am    Post subject: Reply with quote
thanks! Very Happy readInteger totally skipped my train of thought lol. fell into the trap of overcomplicating things Laughing
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