Loading and running EXEs and DLLs from memory

[Antariy]

Hi ragdog,

Be sure that your EXE or DLL does not to have a resource section. It may be the case that my PE loader cannot handle properly your DLL. I am not a Delphi coder and it's not easy to make a comment without a detailed testing of your case.

Hi, Vortex!

I haven't saw this thread before :U

ATM I'm assume, your code parse executable, and make it to "look" like if it was loaded by Windows loader.
But this module will never be instance of executable module for Windows itself. So, any functions which require to explicit/implicit getting of handle of module - will fail.
Delphi itself uses very deep RTLing for almost each action in the program. This RTL might use anything from a bunch of a functions, which require to work with system-type module, not manual loaded. So, it seem that this is reason why Delphi's modules are not work. Just anything HLL with complex RTL will not work with probability 99%.
This is my guess.

[Vortex]

Hi Antariy,

Many thanks for the info. Much appreciated. My guess was that there might be a specific case with Delphi. Your reply explains well the situation. My PE loader is a simple one but it can handle normal executables created with asm and C \ C++  I don't know if there is a chance to tweak Delphi executables to work with my library. That would be interesting.

[ragdog]

Hi Vortex

I hope it help about load dll from memory

http://www.joachim-bauch.de/tutorials/loading-a-dll-from-memory/

C source code
https://github.com/fancycode/MemoryModule

Thanks for your Library

[Vortex]

Here is version 2.1

- The linear search function in the GetProcAddr module is now replaced by a binary search algo delivering higher performance.
- The DLLmem example is improved with a DLL exporting more functions.

[Vortex]

The idea of EXE \ DLL from memory can be useful to create executables exporting functions. Attached zip file is illustrating this case.

ExeExportFunc.exe is a console application exporting functions. ImportFuncFromEXE.exe imports functions from that executable.

[Farabi]

 :U Thanks, this is what Im looking for.

[Vortex]

Hi Onan,

You are welcome. Another method to build an EXE exporting function is to change the base address :

Code Select Expand

\MASM32\BIN\link /base:0x47290000 /MAP /MAPINFO:FIXUPS /SUBSYSTEM:WINDOWS exportexe.obj

The link parameters are not mine. I think I got them from another forum topic.