Maybe fixes some stuff dark magic why:

src/gdt.c

 #include "gdt.h"
 #include "string.h"
 #include "serial.h"
-#include "term.h"
+//#include "term.h"
 
 uint16_t gdt_limit;
 uint32_t gdt_base;
@@ -18,7 +18,7 @@ void gdt_install(){
     gdtr.base = gdt_base;
     asm volatile ("lgdt (%0)": :"r"(&gdtr));
     set_cs(8);
-    asm volatile("mov $0x10, %ax;\
+    asm volatile("mov $0x10, %ax;               \
                  mov %ax, %ds;			\
                  mov %ax, %es;			\
                  mov %ax, %fs;			\

src/idt.c

@@ -15,6 +15,8 @@ void idt_install() {
     idtr.limit = idt_limit;
     idtr.base = idt_base;
     char f[20];
+    itoa(idtr.limit, f);
+    itoa(idtr.base, f);
     asm volatile ("lidt (%0)": :"r"(&idtr));
 }
 

src/kern.c

@@ -16,7 +16,6 @@ void kernel_main() {
     /* Initialize terminal and serial interfaces */
     terminal_initialize();
     serial_init();
-    
     gdt_init();
     idt_init(0x8);