uefi-d ~udk2018

uefi-d

D bindings for UEFI specifications, based on the headers from EDK II UDK2018. They allow to compile fully functional EFI executables without assembly or C bootstrapping, it boots directly to D :-) They can be used to build UEFI-compatible applications and drivers in the D Programming Language. A sample "Hello, world" program is provided, with source and a linux script to compile:

Compilation of D UEFI projects

Handling the projects with dub might not be the simplest, so I think the best way is to use a more sophisticated build system. The executables must not require the D runtime or standard library, suggested ldc2 compiler options for 64-bit compiles:

ldc2 -mtriple=x86_64-unknown-windows-coff -boundscheck=off -nogc -defaultlib= -debuglib= -code-model=large

And GNU linker options:

x86_64-w64-mingw32-gcc -nostdlib -Wl,-dll -shared -Wl,--subsystem,10 -e efi_main

The target must be 64-bit Windows, because UEFI uses its calling conventions for its functions, and currently there is no easy way to mark a function as extern(Win64) or something similar on non-Windows platform in D. It would also be possible to write a minimal D runtime, but this is not a goal for this project in the near future (unless somebody wants to contribute one).