os/kernel/kernel.c

#include <kernel/tty.h>
#include <kernel/idt.h>
#include <debugging.h>
#include <kernel/elf.h>

/* Check if the compiler thinks you are targeting the wrong operating system. */
#if defined(__linux__)
#error "You are not using a cross-compiler, you will most certainly run into trouble"
#endif

uint8_t program[] = {
    0xB8, 0x00, 0x00, 0x00, 0x00, // mov eax, 0x0 (Just a simple NOP-like instruction)
    0xF4                          // hlt (halts the CPU, should trap to kernel if interrupts enabled)
};

void kernel_main(void) 
{
	/* Initialize terminal interface */
	// terminal_initialize();

    idt_init();

    // asm("int $13");
    // asm("ljmp $0x18, $0x00c00100");  // Example: Far jump to user code segment with selector 0x18

    print_hex_bytes(idt_init, 4);
    terminal_putchar('\n');

    run_program(program, 15);

    /* 
    char buf[100];

    while (true) {
        asm("mov %0, %%edx" :: "r" (buf));
        asm("int $0x81");
        terminal_writestring("newline");
        terminal_putchar('\n');
    }

    */
}