UEFI App embedded on another uefi app

[Rafael Machado <rafaelrodrigues.machado@gmail.com>]

Hi Everyone.

I have a limited space problem at a project.
To solve this we had an idea, but would like to ask to you before expending
time on trying to do it, due to some tight schedule. (We know that the best
is to try before ask, but we do not have time for that now. Sorry for that.)

The idea is to create a kind of DecompressorApp.efi, that
uses  EFI_DECOMPRESS_PROTOCOL

During the compilation process of the application the tasks would be:

- Compile App.efi
- Compress App.efi, generating the App.efi.compressed (using
tianoCompress.exe)
- Compile the Decompressor.efi app (with the App.efi.compressed embedded)
       - The idea to do this is to add the compressed app as a Binary at
the DecompressorApp.efi .inf file using the [Binaries] tag


So during the entrypoint of the Decompressor.efi app, the application will
need to copy the compressed part of the app (App.efi.compressed), to a
buffer, and after that this buffer will be decompressed using the
EFI_DECOMPRESS_PROTOCOL. Finally the execution control is passed to the
App.efi decompressed (not sure how to do that yet).

So the questions we have for know are:

- How to detect the App.efi.compressed insyde the loaded app, so we can
have an address to decompress
- How to pass the application executions control to another app, that is in
a buffer (not sure if this can be done with the EFI Boot Service
LoadImage(), since this buffer does not have a valid file device path)

Could you help us on understanding if this is possible?

Thanks and Regards
Rafael R. Machado