Booting to D.

[Adam D. Ruppe]

On Tuesday, 19 November 2013 at 22:49:07 UTC, John Carter wrote:
> What would it take to "Boot to D"?

Check this out:

http://arsdnet.net/dcode/minimal.zip

I stripped out druntime, then put back only enough to get many of 
the language features working, but all standing alone. The 
makefile.bare (or whatever i called it) can make an elf image 
that can be loaded by GRUB onto bare x86 metal and run the little 
D program.

Though...

> Typically things like stack setup, program load, register 
> initialization, zero'ing .bss segments and copying .data 
> segments into ram etc. etc.

this stuff is all done by GRUB, so I cheated a little. It 
shouldn't be too hard to do in D though, if nothing else, a naked 
inline asm function at the start location.

> Sometime mmap or sbrk for heap management.

and I didn't do much heap at all, I just dropped stuff in 
somewhere. But that's because I'm lazy more than because it is 
hard.