entry_asm.s2.asm_bios_ia32 476 B raw

extern bss_begin
extern bss_end
extern entry
extern gdt
​
section .entry progbits alloc exec nowrite align=16
​
global _start
_start:
    cld
​
    ; Zero out .bss
    xor al, al
    mov edi, bss_begin
    mov ecx, bss_end
    sub ecx, bss_begin
    rep stosb
​
    lgdt [gdt]
    jmp 0x18:.reload_cs
  .reload_cs:
    mov eax, 0x20
    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov ss, ax
​
    jmp entry
​
section .note.GNU-stack noalloc noexec nowrite progbits

tab: 2 4 8 wrap: off on

1	extern bss_begin
2	extern bss_end
3	extern entry
4	extern gdt
5
6	section .entry progbits alloc exec nowrite align=16
7
8	global _start
9	_start:
10	cld
11
12	; Zero out .bss
13	xor al, al
14	mov edi, bss_begin
15	mov ecx, bss_end
16	sub ecx, bss_begin
17	rep stosb
18
19	lgdt [gdt]
20	jmp 0x18:.reload_cs
21	.reload_cs:
22	mov eax, 0x20
23	mov ds, ax
24	mov es, ax
25	mov fs, ax
26	mov gs, ax
27	mov ss, ax
28
29	jmp entry
30
31	section .note.GNU-stack noalloc noexec nowrite progbits