holy crap im an idiot, i was getting constatnt gpf because i forgot to pop the stack

kernel/arch/boot.s

@@ -4,6 +4,7 @@
 
 global loader 				; entry symbol for ELF
 extern kmain
+extern gdt_init
 
 MAGIC_NUMBER 	equ 0x1BADB002		; magic number constant
 FLAGS		equ 0x3
@@ -30,6 +31,8 @@ section .text
 loader:
 	mov esp, kernel_stack + KERNEL_STACK_SIZE ; move the top of the stack into esp
 
+	call gdt_init
+
 	call kmain ; pass execution over to our kmain function, where all of the real stuff is done
 
 	; Should the system exit, we clear the interrupt flag