.global gdt_set
.extern gdtr
.type gdt_set, @function
gdt_set:
    lgdt gdtr
    jmp $0x8, $gdt_set_reload
gdt_set_reload:
    mov $0x10, %ax
    mov %ax, %ds
    mov %ax, %es
    mov %ax, %fs
    mov %ax, %gs
    mov %ax, %ss
    ret

.size gdt_set, . - gdt_set