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; MIT License, Copyright (c) 2021 Marvin Borner
extern bss_begin
extern bss_end
extern start
extern gdt
section .entry
global _start
_start:
cld
; Clear bss section
xor al, al
mov edi, bss_begin
mov ecx, bss_end
sub ecx, bss_begin
rep stosb
lgdt [gdt] ; Load GDT
jmp 0x18:.reload_cs ; Use third GDT segment for code
.reload_cs:
mov eax, 0x20 ; Use fourth GDT segment for data/other
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
jmp start
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