I am still confused about how to copy to uefi bootable fat32-formatted cdrom on the disk.I want this way I can complete the install to the GPT-formatted hard disk.Have anyone know the way to install my hobby OS to the uefi-based virtual machine?

I wanted an C source code with using edk2,gnu-efi,posix-efi or bare metal,so does anyone have the idea about UEFI C code install the cdrom on the hard disk?