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Oh god, what is going on? wsprintf insanity and masm.

 
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hcavolsdsadgadsg
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PostPosted: Mon Nov 19, 2007 2:03 am    Post subject: Oh god, what is going on? wsprintf insanity and masm. Reply with quote
As wacky as it may be, I want to loop through until I hits the location I specified. (Everything read will eventually all go to a text file, but this is currently blowing my mind) Now, for instance, it's starting at 00900000 and going to 0100579C... well...

Code:
      readloop:
         invoke ReadProcessMemory, gameProcess, base, addr buffer, 4, NULL         
         add base, 00000001h
         cmp base, 0100579Ch
         jne readloop
         je result
         result:            
            mov eax, dword ptr [buffer]
            invoke wsprintf, addr buffer, addr format, eax
            invoke SetDlgItemText, hwnd, IDC_EDT1, addr buffer


this works no problem... but... Instead of 3, it shits out 300, 7 would turn into 700. 10F would turn into 10f00, etc. basically, it's correct... except it's uh... moved over.

Now if I for example start at 0100579C and just do this...

Code:
      readloop:
         invoke ReadProcessMemory, gameProcess, base, addr buffer, 4, NULL         
            mov eax, dword ptr [buffer]
            invoke wsprintf, addr buffer, addr format, eax
            invoke SetDlgItemText, hwnd, IDC_EDT1, addr buffer



It ends up perfectly fine. What the shit?
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appalsap
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PostPosted: Mon Nov 19, 2007 2:29 am    Post subject: Reply with quote
You step through the code with a debugger and see if eax changes during your extra instructions for the first snippet where it does not in the second.
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