K900 Alright this may be a NixOS related cross compiling question but maybe not.

I have a very simple C program that looks like this:

void _start() {
  volatile long *a = (long *)0x1FFA0;
  volatile long *b = (long *)0x1FFA8;
  volatile long *c = (long *)0x1FFB0;

  *c = *b / *a;

  for(;;) {}
}

This relies on doing software division (the actual hardware instruction can only do 32 bit / 16 bit -> 16 bit or something like that). So it calls __divsi3.

__divsi3 seems to be compiled incorrectly. It tries to use a BSR.L instruction, which doesn't exist on the m68k. It only has the BSR.W and BSR.B instructions. I am wondering what I would need to do to fix this

test.bin: test.o Linker.ld
	m68k-unknown-none-elf-gcc -T Linker.ld -o test.bin -O2 -m68000 -Wall -Wextra -nostdlib test.o -ffreestanding -lgcc

%.o: %.c
	m68k-unknown-none-elf-gcc -m68000 -c $< -o $@ -ffreestanding -nostdlib -O0 -Wall -Wextra -fno-PIC -static-libgcc

Here's my makefile btw