Assembly Injection (Delphi!) -> 0x0039D8C0 not executable

[berlinermauer]

Hey Guys, to make it short,

I cannot use your .dll's based on .NET (and i don't want it), on top of that i've my own way to inject, without need to hook Endscene.

Ok, what happens if, when the Code reaches the CALL 0x0039D8C0, WoW crashes, with the comment, that 0x0039D8C0 cannot be Executed.

It's like 0x0039D8C0 would be an address in a page, which has no right to execute code.
Now, i don't understand why?

When opening OllyDBG i see, that there are pages reserved by my G15's dlls but I don't think that this is disturbing..

Error MSG:
ERROR #132 (0x85100084) Fatal Exception
Program: C:\Program Files\World of Warcraft\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:0039D8C0

The instruction at "0x0039D8C0" referenced memory at "0x0039D8C0".
The memory could not be "executed".

Thanks for help!

[culino]

MyAddress := DWORD(GetModuleHandle(nil)) + $0039D8C0;

enjoy!

[Azzie2k8]

Hey Guys, to make it short,

I cannot use your .dll's based on .NET (and i don't want it), on top of that i've my own way to inject, without need to hook Endscene.

Ok, what happens if, when the Code reaches the CALL 0x0039D8C0, WoW crashes, with the comment, that 0x0039D8C0 cannot be Executed.

It's like 0x0039D8C0 would be an address in a page, which has no right to execute code.
Now, i don't understand why?

When opening OllyDBG i see, that there are pages reserved by my G15's dlls but I don't think that this is disturbing..

Error MSG:
ERROR #132 (0x85100084) Fatal Exception
Program: C:\Program Files\World of Warcraft\WoW.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:0039D8C0

The instruction at "0x0039D8C0" referenced memory at "0x0039D8C0".
The memory could not be "executed".

Thanks for help!

If I am not wrong than this is a very common error meaning pretty much everything. Maybe you have a Nullpointer or sth. but btw why is the function trying to access itself ?

The instruction at "0x0039D8C0" referenced memory at "0x0039D8C0".

or maybe you did not initiliaze a member within this function or just some argmunet is bad.

This is just a guess and I am not really experienced with this but I had those Acces violations a couple of time when referencing to bad memory, not rebasing addresses or not having the proper rights to execute and so on so I think your error must be inside your code. But again just a guess...

[_Mike]

If I am not wrong than this is a very common error meaning pretty much everything. Maybe you have a Nullpointer or sth. but btw why is the function trying to access itself ? or maybe you did not initiliaze a member within this function or just some argmunet is bad.

You're wrong. DEP says hai.

[Azzie2k8]

You're wrong. DEP says hai.

Well thats what I meant with

[...]not having the proper rights to execute[...]

?

[_Mike]

Well thats what I meant with

[...]not having the proper rights to execute[...]

?

I was refering to "If I am not wrong than this is a very common error meaning pretty much everything." and "but btw why is the function trying to access itself ?"

From the OP's error message:

Exception: 0xC0000005 (ACCESS_VIOLATION) at 0023:0039D8C0
The instruction at "0x0039D8C0" referenced memory at "0x0039D8C0".
The memory could not be "executed".

It doesn't get much more specific than that.

[berlinermauer]

Ok Guys, it works.

Problem was, that i didn't know that i have to add the ASLR-Address (bcaus someone said, that adresses in there are logical etc).
Second Problem was, I Passed the String wrong (WriteProcessMemory owned me ;D)

Does anyone have a full List of WoW LUA Functions? or some inspiration?

[Azzie2k8]

Ok Guys, it works.

Problem was, that i didn't know that i have to add the ASLR-Address (bcaus someone said, that adresses in there are logical etc).
Second Problem was, I Passed the String wrong (WriteProcessMemory owned me ;D)

Does anyone have a full List of WoW LUA Functions? or some inspiration?

take a look World of Warcraft API - WoWWiki - Your guide to the World of Warcraft