Hey there, I want to inject a dll which was created in D into a c Program.

Informations:
DMD vs. 2.058
IDE: MonoDevelop with Mono-D
System: Windows 7 64bit

Program Informations:
32-bit
written in c

The Injector is working for sure, so thats not the Problem.

the Source of the DLL:
import std.c.windows.windows;
import core.sys.windows.dll;

__gshared HINSTANCE g_hInst;

extern (Windows)
BOOL DllMain(HINSTANCE hInstance, ULONG ulReason, LPVOID pvReserved)
{
    final switch (ulReason)
    {
	case DLL_PROCESS_ATTACH:
	    g_hInst = hInstance;
	    dll_process_attach( hInstance, true );
	    break;

	case DLL_PROCESS_DETACH:
	    dll_process_detach( hInstance, true );
	    break;

	case DLL_THREAD_ATTACH:
	    dll_thread_attach( true, true );
	    break;

	case DLL_THREAD_DETACH:
	    dll_thread_detach( true, true );
	    break;
    }
    return true;
}

It builds fine, but If I inject it, the program (where the dll is injected) says that the dll is not a valid image.
screenshot: http://imagr.eu/up/4f72240329a846_Unbenannt.png

Maybe it's because I have no def file.
But i dont know how to link it with Mono-D.

when I tried the previous dmd compiler (have yet to try the curent one on this problem) I got the same problems while trying to compile a dll and use it. I have no clue as to why this is happening. worked in 2.54 I thought

On Tuesday, 27 March 2012 at 20:45:52 UTC, maarten van damme wrote:
> when I tried the previous dmd compiler (have yet to try the curent one on
> this problem) I got the same problems while trying to compile a dll and use
> it. I have no clue as to why this is happening. worked in 2.54 I thought

I thought D would be a good alternative for c++, but as it seems I need to stay with c++ :/
Thats really bad, a minus point on my "Why choose D" list.

> Maybe it's because I have no def file.

Very possible.
Just pass it to dmd like the other files.
Or try the new -shared flag.

On Tuesday, 27 March 2012 at 21:12:59 UTC, Trass3r wrote:
>> Maybe it's because I have no def file.
>
> Very possible.
> Just pass it to dmd like the other files.
> Or try the new -shared flag.

I have tried both now (shared and def file linking), but know it's crashing my App, lol.

I inject it but it returns nothing and the App(where the dll is injected) is hanging( not responding).

Could you try it maybe?
I would like to know whether it's a Problem with D or with me.

> I inject it but it returns nothing and the App(where the dll is injected) is hanging( not responding).
>
> Could you try it maybe?
> I would like to know whether it's a Problem with D or with me.

Are dlls without injection working?

On Tuesday, 27 March 2012 at 21:46:23 UTC, Trass3r wrote:
>> I inject it but it returns nothing and the App(where the dll is injected) is hanging( not responding).
>>
>> Could you try it maybe?
>> I would like to know whether it's a Problem with D or with me.
>
> Are dlls without injection working?

I don't know, haven't tested it.
Will test it when I'm back home, but I think they work( not sure).

I wrote my own injector and this makes the target exe call loadlibrary.
this works on every dll I try to inject apart from dll's written in D
(starting with dmd version 2,054 or something like that).
I'll try with D calling loadlibrary on D dll's this evening.

> this works on every dll I try to inject apart from dll's written in D
> (starting with dmd version 2,054 or something like that).

If this is a regression, please narrow it down to the exact version.

I went ahead and went back to as far as 2.045 and I still couldn't get a
working dll. This would suggest something is wrong with my dll injection
code but I've tested with a few other random dll's and that appears to
work. according to my debugger the problem is an access violation while
executing the main function of the D dll.
the code I use for injecting is

/**
* injectDLL injects a dll in a given process using the CreateRemoteThread
function.
*
* arguments:
*  HANDLE proc = A HANDLE to the process
*  string dllName = A string containting the name of the dll
**/
void injectDLL(HANDLE proc,string  dllName)
{
//first we need to get a pointer to the loadlibrary function
LPVOID LoadLibAddy =
cast(LPVOID)GetProcAddress(GetModuleHandle("kernel32.dll"), "LoadLibraryA");
 //The problem is that we need to pass an argument(string) but that string
is in our memory space
//so we have to allocate space to write our dllName to using
writeprocessmemory
LPVOID RemoteString = VirtualAllocEx(proc,null,dllName.length,MEM_COMMIT |
MEM_RESERVE,PAGE_READWRITE);
 //write the dllName
WriteProcessMemory(proc,RemoteString,toStringz(dllName),dllName.length,null);
 //create a thread in the remote process loading the dll
CreateRemoteThread(proc, null, 0, cast(LPTHREAD_START_ROUTINE)LoadLibAddy,
cast(LPVOID)RemoteString, 0, null);
}

Op 28 maart 2012 13:13 schreef Trass3r <un@known.com> het volgende:

> this works on every dll I try to inject apart from dll's written in D
>> (starting with dmd version 2,054 or something like that).
>>
>
> If this is a regression, please narrow it down to the exact version.
>