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[HELP]I don't understand <color = red>CALL</color&a

 
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acgofficial
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PostPosted: Mon Aug 27, 2018 2:46 am    Post subject: [HELP]I don't understand <color = red>CALL</color&a Reply with quote

Code injection, injection of the [color=red:e53c1542fd]CALL[/color:e53c1542fd] and I incoming parameters.
I am very unhappy, Always program crashes.
I don't know that there are a few parameters.
I don't know, Find the [color=red:e53c1542fd]CALL[/color:e53c1542fd] is not correct.

Please help me, Please paste your assembly code.
Post this table, Thank you.[/b]

I would like to say there are other problems, I wrote a statement code.
code is "mov ecx,23F"
call address

but, go to address, ecx value is 00000000
Sad why?........


Pictures, please look from bottom to top look.



4.png
 Description:
Png = Four
Debug = Two
 Filesize:  163.87 KB
 Viewed:  1582 Time(s)

4.png



3.png
 Description:
Png = Three
Debug = One
 Filesize:  182.47 KB
 Viewed:  1582 Time(s)

3.png



2.png
 Description:
Png = Two
Not Debug = Two
 Filesize:  86.88 KB
 Viewed:  1582 Time(s)

2.png



1.png
 Description:
Png = One
Not Debug = One
 Filesize:  137.04 KB
 Viewed:  1582 Time(s)

1.png


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ParkourPenguin
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PostPosted: Mon Aug 27, 2018 9:09 am    Post subject: Reply with quote

Looks like it's using the fastcall convention.
https://msdn.microsoft.com/en-us/library/6xa169sk.aspx
Examples can be found using a search engine (WikiBooks, CodeProject)

As for "mov ecx,23F", perhaps you placed a breakpoint on that instruction. The breakpoint triggers before the instruction is executed.

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acgofficial
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PostPosted: Mon Aug 27, 2018 9:49 am    Post subject: Reply with quote

ParkourPenguin wrote:

As for "mov ecx,23F", perhaps you placed a breakpoint on that instruction. The breakpoint triggers before the instruction is executed.

I didn't catch what you said......
I just ask......

Is called before the "call", if there is no written a "push".
Injected code, don't write a push.
Surprised Whether it is right?

Look, I post picture.
I think, here only two parameters
Surprised Whether it is right?

I bought a 8086 CPU assembly early tutorial book, because there is no CE CALL CALL, the method of writing are different, even I can't understand its meaning, so I have to always ask the person of CheatEngine side, the help of CE described the usage of the CALL, but not detailed enough.


In addition, I don't know how to observe the stack, don't know how many parameters.



1.jpg
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 Viewed:  1537 Time(s)

1.jpg


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OldCheatEngineUser
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PostPosted: Mon Aug 27, 2018 12:57 pm    Post subject: Reply with quote

....
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I Use CE Since Version 1.X, And Still Learning How To Use It Well!
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acgofficial
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PostPosted: Mon Aug 27, 2018 7:06 pm    Post subject: Reply with quote

OldCheatEngineUser wrote:
....

Shocked At present, I don't know what "CALL", other all understand......Probably understand......

Injecting code,Every time every time, I'm always program crashes into the "CALL", I also is going to collapse the entire spirit of the people.

Surprised Anyway, please help me, I want to learn to "CALL", understand it.
qwq Thank you~
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