Assembly support in AutoIt

[James]

You could technically write an ASM interpreter here. Add POP, PUSH and MOV and away you go

[Ward]

How many ways there are to load assembly code from our scripts, that you know of?

I only know how to load binary codes from scripts, however, this codes must be designed carefully to avoid static reference.

If you really want to load assembly code, maybe you can try finding some assembler DLL, like this one olly_dll. I am too busy to test it now, may be later.

But in fact, I don't think compiling assembly code and running them by script is really helpful. It is just for fun. A cleverer way is to compile the code into DLL and then load them by MemoryDLL.

Is there any way for AutoIt script to be compiled to PE format? Why don't you try it? I can see thousands of problems, but I think that few smart heads could even make it happen.

You mean Aut2exe?

[trancexx]

I only know how to load binary codes from scripts, however, this codes must be designed carefully to avoid static reference.

If you really want to load assembly code, maybe you can try finding some assembler DLL, like this one olly_dll. I am too busy to test it now, may be later.

But in fact, I don't think compiling assembly code and running them by script is really helpful. It is just for fun. A cleverer way is to compile the code into DLL and then load them by MemoryDLL.

You mean Aut2exe?

Fun is good.

I don't mean Aut2exe. I mean something like this:

Step 1 - make script

Func _Add($iA, $iB)
    Return $iA + $iB
EndFunc

Step 2 - create assembly code out of that script

push ebp
mov ebp, esp
mov eax, dword[ebp+08]
add eax, dword[ebp+0C]
pop ebp
ret

Step 3 - get opcode out of assembly code

0x5589E58B450803450C5DC3

step 4 - wrap it in exe or dll

In other words - compile script to exe. Make a true compiler for AutoIt scripts.

I'm aware of the size of possible job but nevertheless...

[Ward]

You mean write a compiler?

I will never say never, but it is really a very hard work you know...

I think it may be not worth to try, even for fun.

[trancexx]

Yes, AutoIt is primarily scripting language and compiling option present at this moment is, I guess, just for popularizing it.

But to be frank I'm in love with it's syntax and stuff. So when I think what could be done if it could be compiled. Well, you know... kids writing bitchen apps and maybe even Vulcans be coming.

[monoceres]

Example of calling a function.

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#include <winapi.au3>
ConsoleWrite("Entering sleep... ")
AsmSleepCall(2500)
ConsoleWrite("Done!"&@CRLF)
Func AsmSleepCall($iMilliseconds)
    #cs Assembly code
        B8 00000000         move eax, 00000000
        50                  push eax
        E8 0x00000000       call 0x00000000 // This needs to be the offset from the instruction after the call
        C3                  ret
    #ce

; Pointer to Sleep()
    Local $SleepAddress = DllCall("Kernel32.dll", "ptr", "GetProcAddress", "ptr", _WinAPI_GetModuleHandle("Kernel32.dll"), "str", "Sleep")
    $SleepAddress = $SleepAddress[0]


    Local $CodeBuffer = DllStructCreate("byte[12]")
; Calculate the offset from the address after the call
    Local $offset = $SleepAddress - (DllStructGetPtr($CodeBuffer) + 11)

; x86 is using little endian
    DllStructSetData($CodeBuffer, 1, "0xB8" & SwapEndian($iMilliseconds) & "50E8" & SwapEndian($offset) & "C3")


    Local $Ret = DllCall("user32.dll", "int", "CallWindowProc", _
            "ptr", DllStructGetPtr($CodeBuffer), _
            "int", 0, _
            "int", 0, _
            "int", 0, _
            "int", 0)
    Return $Ret[0]
EndFunc;==>AsmSleepCall


Func SwapEndian($hex)
    Return Hex(BitOR(BitOR(BitOR(BitShift($hex, 24), _
            BitAND(BitShift($hex, -8), 0x00FF0000)), _
            BitAND(BitShift($hex, 8), 0x0000FF00)), _
            BitShift($hex, -24)), 8)
EndFunc;==>SwapEndian

Guess I could squeeze more of the code into the binary, but meh, this was hard enough to get to work.

For other people wantingto work with this, I used the following references for opcodes and opcode usage.

http://developer.intel.com/design/PentiumI...uals/243191.htm

http://www.swansontec.com/sintel.html

http://www.sandpile.org/ia32/opc_1.htm

Edited May 5, 2009 by monoceres

[UEZ]

Example of calling a function.

expandcollapse popup

ConsoleWrite("Entering sleep... ")
 AsmSleepCall(2500)
 ConsoleWrite("Done!"&@CRLF)
 Func AsmSleepCall($iMilliseconds)
     #cs Assembly code
         B8 00000000            move eax, 00000000
         50                 push eax
         E8 0x00000000      call 0x00000000 // This needs to be the offset from the instruction after the call
         C3                 ret
     #ce
 
; Pointer to Sleep()
     Local $SleepAddress = DllCall("Kernel32.dll", "ptr", "GetProcAddress", "ptr", _WinAPI_GetModuleHandle("Kernel32.dll"), "str", "Sleep")
     $SleepAddress = $SleepAddress[0]
 
 
     Local $CodeBuffer = DllStructCreate("byte[12]")
; Calculate the offset from the address after the call
     Local $offset = $SleepAddress - (DllStructGetPtr($CodeBuffer) + 11)
 
; x86 is using little endian
     DllStructSetData($CodeBuffer, 1, "0xB8" & SwapEndian($iMilliseconds) & "50E8" & SwapEndian($offset) & "C3")
 
 
     Local $Ret = DllCall("user32.dll", "int", "CallWindowProc", _
             "ptr", DllStructGetPtr($CodeBuffer), _
             "int", 0, _
             "int", 0, _
             "int", 0, _
             "int", 0)
     Return $Ret[0]
 EndFunc;==>AsmSleepCall
 
 
 Func SwapEndian($hex)
     Return Hex(BitOR(BitOR(BitOR(BitShift($hex, 24), _
             BitAND(BitShift($hex, -8), 0x00FF0000)), _
             BitAND(BitShift($hex, 8), 0x0000FF00)), _
             BitShift($hex, -24)), 8)
 EndFunc;==>SwapEndian

Guess I could squeeze more of the code into the binary, but meh, this was hard enough to get to work.

For other people wantingto work with this, I used the following references for opcodes and opcode usage.

http://developer.intel.com/design/PentiumI...uals/243191.htm

http://www.swansontec.com/sintel.html

http://www.sandpile.org/ia32/opc_1.htm

Nice example but #include <WinAPI.au3> is missing

UEZ

[monoceres]

Nice example but #include <WinAPI.au3> is missing

UEZ

Oops, thanks.