new to FASM, need a little bit of help.

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slovach

Joined: 14 May 2007
Posts: 4

slovach 13 Oct 2007, 06:59

some quick questions, which are in the code. trying to work out the kinks from MASM to this. thanks!

Code:

format PE GUI 4.0
include 'win32a.inc'
        invoke FindWindow, NULL, gameWindow
       ; if eax == 0
             invoke MessageBox,0, message, caption, MB_OK
       ; endif -- first problem, how exactly do the if macros work in FASM?
        invoke GetWindowThreadProcessId, eax, gamePID
        invoke OpenProcess, PROCESS_ALL_ACCESS, FALSE, gamePID
       ; mov gameProcess, eax -- this is the second problem, why can't i do this?

         invoke WriteProcessMemory, gameProcess, startAddress, patch, 6, NULL
         invoke WriteProcessMemory, gameProcess, startAddress, injection, 18, NULL

exit:
        invoke  ExitProcess, 0

gameWindow  db 'Minesweeper', 0
gamePID     db ?
gameProcess db ?
message    db 'failed', 0
caption    db 'test', 0


... unimportant stuff past this point

13 Oct 2007, 06:59

smoke

Joined: 16 Jan 2006
Posts: 42

smoke 13 Oct 2007, 08:19

you can do it like this:

Code:

format PE GUI 4.0 
include 'win32a.inc' 
         invoke FindWindow, NULL, gameWindow 
         test eax,eax
         jne @f
         invoke MessageBox,0, message, caption, MB_OK 
@@:
         invoke GetWindowThreadProcessId, eax, gamePID 
         invoke OpenProcess, PROCESS_ALL_ACCESS, FALSE, gamePID 
         mov dword[gameProcess],eax
         invoke WriteProcessMemory, gameProcess, startAddress, patch, 6, NULL 
         invoke WriteProcessMemory, gameProcess, startAddress, injection, 18, NULL 

exit: 
        invoke  ExitProcess, 0 

gameWindow  db 'Minesweeper', 0 
gamePID     db ? 
gameProcess db ? 
message    db 'failed', 0 
caption    db 'test', 0

although you still need the import table Smile

13 Oct 2007, 08:19

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 13 Oct 2007, 08:52

smoke wrote:

although you still need the import table

Speaking as a long-time MASM/ML user this was one of the harder things to get used to, but once you get it then no worries.
I'm still exploring the win32*.inc files, but the level of control is 'sweet, mate' Very Happy

I am for sure a convert to FASM, especially FASMW. (seeya hutch...)

As for the trainer part,

Code:

         invoke GetWindowThreadProcessId, eax, gamePID  
         invoke OpenProcess, PROCESS_ALL_ACCESS, FALSE, gamePID
...
         gamePID     db ?

needs to be

Code:

         invoke GetWindowThreadProcessId, eax, gamePID  ;<<<<<gamePID here is the address of a DWORD
         invoke OpenProcess, PROCESS_ALL_ACCESS, FALSE, [gamePID]  ;<<<<<<brackets denote contents not address
...
         gamePID     dd ?  ; <<<<<< dword not byte

Brackets/OFFSET was another hurdle for MASM->FASM

13 Oct 2007, 08:52

slovach

Joined: 14 May 2007
Posts: 4

slovach 13 Oct 2007, 16:15

smoke wrote:

although you still need the import table

Yeah I forgot to include that in my post since it was so late, but I had one. Smile

I got everything working all dandy now, thanks fellas!

13 Oct 2007, 16:15

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