#include <stdint.h>
#include <stddef.h>
#include <debugging.h>
#include <kernel/tty.h>
#include <kernel/gdt.h>

void run_program(uint8_t* program, size_t length)
{
    uint8_t* userland_code = (uint8_t*) 0x00800004;

    for (size_t i = 0; i < length; i++) {
        userland_code[i] = program[i];
    }

    tss.ss0 = 0x10;

    asm("sti");
    asm("int 0x80");

    asm("mov %0, esp" : "=r" (tss.esp0));

    // Generates segfault
    // asm("mov esp, %0" : "=r" (tss.esp0));

    asm("mov ax, 0x23 # Load registers with the correct GDT segments values");
	asm("mov ds, ax");
	asm("mov es, ax");
	asm("mov fs, ax");
	asm("mov gs, ax");

    asm("push 0x23");
    asm("push 0x00c00100");

    asm("pushfd");
    asm("pop eax");
    asm("or eax, 0x200");
    asm("push eax");

    asm("push 0x1b");
    asm("push 0x00800000");

    asm("iret");

    asm("int 0x21");
}