问题
I am looking at developing a simple (to start with) UEFI Boot loader to load a ELF image, and was wondering if anyone had a good entry point into maybe any existing projects, or examples that I can use to get started out with.
In addition I was wondering if any one had any experience in getting virtual box to run an EFI application. I have set up a VM with EFI mother board but can seam to create an EFI System Partition for it to load out of (without using an OS), all I can achieve is the UEFI command line.
回答1:
You might try taking a look at the GRUB or elilo source code. These are also good because they support loading ELF images. You might also look to the EDK2, there is a lot of good code there, and it's easy to build EFI executable images with it.
When referencing the UEFI, I also like to use Phoenix's wiki. I find the boot services entry to be especially useful.
Hope this helps at least a little!
回答2:
I recently became interested in bootloaders too. I'm still a newbie in this field, but I found this interesting step-by-step tutorial to code a "Hello World" bootloader. Hope it gives you or anyone else with the same question a starting point for developing your bootloader.
回答3:
GRUB installation on UEFI is possible by means of grub-mkimage. ELF binaries are known to be similarly masqueraded as complying UEFI's PE32+ requirement. If some C developers will refactor the code as done by https://www.kernel.org/doc/Documentation/efi-stub.txt and then generalize mkimage's that code as a separate tool for the sake of multibooters without PE32+ kernel loaders for every OS...
Just imagine
ld -b input-format -o <output>.efi --oformat=output-format objfile ...
来源：https://stackoverflow.com/questions/19834592/uefi-bootloader