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Small request

 
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Ike21
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PostPosted: Wed Nov 05, 2008 3:01 pm    Post subject: Small request Reply with quote
I have a small request, I've started coding in delphi no long ago and I want to get into DLL memory editing. I already made my own small trainer for minesweeper, turned out good for most of people. Anyways, here's the question : Could anyone show me a little exemple of a DLL using assembler scripts to edit the memory? Just a quick explanation is alright.

Thanks in advance.
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Innovation
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PostPosted: Wed Nov 05, 2008 3:10 pm    Post subject: Reply with quote
For C++ and Delphi DLL memory editing reference:
http://forum.cheatengine.org/viewtopic.php?p=2729175#2729175

Delphi DLL:
Code:
PLongWord($00AA0C62)^ := 9999999;
// 00AA0C62 is the address.
// 9999999 are the bytes being written.
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Ike21
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PostPosted: Wed Nov 05, 2008 3:21 pm    Post subject: Reply with quote
Yeah, I understand that. But what I don't get is how you input an assembler script in a delphi code. :/
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Innovation
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PostPosted: Wed Nov 05, 2008 3:27 pm    Post subject: Reply with quote
Post an example script so I can explain better.
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Ike21
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PostPosted: Wed Nov 05, 2008 3:33 pm    Post subject: Reply with quote
Err.. okay here you go :

Code:
6236A8:
db 00 00
8Fca27:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
8Fd2a7:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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Innovation
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PostPosted: Wed Nov 05, 2008 3:42 pm    Post subject: Reply with quote
Layout:
Code:
PLongWord($[INSERT ADDRESS HERE])^ := [INSERT BYTES HERE];


Replace [INSERT ADDRESS HERE] with the address you are writing to.
Replace [INSERT BYTES HERE] with the bytes you want to write.

This shouldn't be too hard.
>.>

[-----------------------------------------------------------------------]
Code:
6236A8:
db 00 00

Becomes:
Code:
PLongWord($006236A8)^ := 0000;

[-----------------------------------------------------------------------]
Code:
8Fca27:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Becomes:
Code:
PLongWord($008FCA27)^ := 000000000000000000000000000000000000000000000000;

[-----------------------------------------------------------------------]
Code:
8Fd2a7:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Becomes:
Code:
PLongWord($008Fd2a7)^ := 00000000000000000000000000000000;

[-----------------------------------------------------------------------]
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Ike21
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PostPosted: Wed Nov 05, 2008 3:47 pm    Post subject: Reply with quote
Ohh, It's that simple? Wow. I feel stupid. Thanks for helping.
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samuri25404
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PostPosted: Wed Nov 05, 2008 3:48 pm    Post subject: Reply with quote
inoobzx wrote:
Layout:
Code:
PLongWord($[INSERT ADDRESS HERE])^ := [INSERT BYTES HERE];


Replace [INSERT ADDRESS HERE] with the address you are writing to.
Replace [INSERT BYTES HERE] with the bytes you want to write.

This shouldn't be too hard.
>.>

[-----------------------------------------------------------------------]
Code:
6236A8:
db 00 00

Becomes:
Code:
PLongWord($006236A8)^ := 0000;

[-----------------------------------------------------------------------]
Code:
8Fca27:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Becomes:
Code:
PLongWord($008FCA27)^ := 000000000000000000000000000000000000000000000000;

[-----------------------------------------------------------------------]
Code:
8Fd2a7:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Becomes:
Code:
PLongWord($008Fd2a7)^ := 00000000000000000000000000000000;

[-----------------------------------------------------------------------]


That's not gonna work.

00000000000000000000000000000000000000 converts to 0, and since a word is two bytes, It'll overwrite the first 2 bytes with "00", then not do anything about the rest.

I suggest a loop.
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Innovation
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PostPosted: Wed Nov 05, 2008 3:50 pm    Post subject: Reply with quote
To edit memory like that you have to to use a DLL otherwise you would be editing memory of your own process.

Edit:

Oh ya thanks samuri25404 I forgot about that.

If you really want to edit that many bytes all to 00 edit them using a loop (just like samuri25404 said).

Like this:

Code:
8Fd2a7:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00


Code:
library MyDLL;

var
   Address : Cardinal;
begin

Address := $008FD2A7;

repeat 
PLongWord(Address)^ := 00;
Address := Address + 1; // That might not be right I forgot how to add to cardinal integers...
until (Address = $008FD2B6);

end.


Last edited by Innovation on Wed Nov 05, 2008 4:04 pm; edited 3 times in total
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Ike21
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PostPosted: Wed Nov 05, 2008 4:01 pm    Post subject: Reply with quote
Oh. Well, thanks for helping you two Smile
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samuri25404
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PostPosted: Wed Nov 05, 2008 6:20 pm    Post subject: Reply with quote
Or, if you're using C++, you could use memset(); I'm not sure if Delphi has use of that, or not.
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pkedpker
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PostPosted: Wed Nov 05, 2008 9:22 pm    Post subject: Reply with quote
yah you have to use memset for that.

in delphi

memset = FillChar(var Address; Count: Integer; value: Byte);

http://www.delphibasics.co.uk/RTL.asp?Name=FillChar

so

8Fd2a7:
db 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

would be like 15 of zero so....

FillChar(DunnoHowToDoAddress, 15,0);
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