Cheat Engine

[24quant42]

Who can explain why the GetModuleHandleA method returns the correct 8 byte address, and the movsxd line truncates the value by adding FFFFFFFF in front. As if making the number negative.

This is my script in AOB:
newmem:
cmp [isFirstRun],0
jne code
mov [isFirstRun],1
{$ccode}
(unsigned long long)GetModuleHandleA(0);
{$asm}


I should get an address like:
7F****EFCE22D2
but I get
FFFFFFFFEFCE22D2

it's all the fault of movsxd, which for some reason just breaks the RAX register, and it's not clear why it uses EAX and not RAX.
Can someone explain the reason and how to solve this problem?
I built the CE myself from the latest up-to-date sources.

After calling the call instruction through the debugger, I see the address I need in the register, 8 bytes, it is correct.
But after movsxd, it gets truncated and 4 bytes are lost.
I think the reason is {$ccode}, which adds movsxd and everything breaks. These are my assumptions, I may be mistaken about the reason, but the problem is this

[Dark Byte]

GetModuleHandleA is an undefined functions, so the C compiler assumes it returns an int

add this line:
unsigned long long GetModuleHandleA(unsigned long long);

and it'll work better. (replace the param with a char * for an even more accurate description, but for your case that's not needed I guess)

[24quant42]

Some kind of magic again.
Thanks, everything is working)