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translate ASM code to inline c++ ASM

 
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0xCookies
How do I cheat?
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Joined: 23 Mar 2015
Posts: 6
PostPosted: Mon Mar 23, 2015 1:13 pm    Post subject: translate ASM code to inline c++ ASM Reply with quote
In have to translate some ASM code from cheat engine to a c++ inline script.

Here is my standart AA script:


Code:

[ENABLE]
alloc(newmem,1000)
label(returnhere)
label(exit)
label(jump2)
label(multi)
registersymbol(jump2)

aobscan(aobi,8B 81 AC 00 00 00 89 E5)


multi:
dd (float)5


newmem:

fld dword [ecx+000000AC]      // fld, fadd and fstp doesn't seems like can
fadd dword [multi]//fmull         // be used in c++ inline asm.
fstp dword [ecx+000000AC]     //
mov eax,dword [ecx+000000AC] 

 //  [ecx+000000AC] -> AC gives a error in c++

mov [ecx+000000AC],eax


exit:
jmp returnhere

aobi:
jump2:
jmp newmem
nop
returnhere:

[DISABLE]
dealloc(newmem)
jump2:
db 8B 81 AC 00 00 00
unregistersymbol(jump2)


So here is what I'm trying to do, after I already nopped the address:
Code:


#define jmp(frm, to) (int)(((int)to - (int)frm) - 5);

void __declspec(naked) LeftPvacAsm() //inline ASM for Left Pvac
{
   
    __asm
    {

   label(multi) // doesn't work
                         //
   multi:         //
   dd (float)5  //

   fld dword [ecx+000000AC] //fld doesn't exists
fadd dword [multi]    //fadd doesn't exists and [multi] doesn't work         


        fstp dword [ecx+000000AC] //fstp doesn't exists
   mov eax,dword [ecx+000000AC] //same here

   mov [ecx+000000AC],eax //same here
    }
}



Does anyone know how to handle that?
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justa_dude
Grandmaster Cheater
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Joined: 29 Jun 2010
Posts: 893
PostPosted: Mon Mar 23, 2015 7:43 pm    Post subject: Reply with quote
I think you should start by coding some very simple examples of inline ASM to get the hang of the conventions - which instructions are available vs those that are exclusive to CE, whether or not to end statements w/ semicolons, etc. That is, if inline ASM is even what you really need...

I can't think of too many valid reasons to declare a function to have naked calling convention. Especially when your function takes no arguments.

Are you compiling this into a DLL to be injected into the target process, or is it intended to be a conventional trainer? Either way, I don't think you're on the right path. Could you maybe explain what your algorithm is or the steps your program intends to take?
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