spinup.asm_bios_ia32 706 B raw

section .rodata
​
invalid_idt:
    dd 0, 0
​
section .text
​
extern flush_irqs
​
global common_spinup
bits 32
common_spinup:
    cli
​
    lidt [invalid_idt]
​
    call flush_irqs
​
    xor eax, eax
    lldt ax
​
    ; We don't need the return address
    add esp, 4
​
    ; Get function address
    pop edi
​
    ; We don't need the argument count
    add esp, 4
​
    mov eax, 0x00000011
    mov cr0, eax
​
    xor eax, eax
    mov cr4, eax
    mov cr3, eax
​
    ; Clear TSS busy bit and load TR with base 0, limit 0
    sub esp, 8
    sgdt [esp]
    mov eax, [esp + 2]
    add esp, 8
    mov byte [eax + 0x3d], 0x89
    mov ax, 0x38
    ltr ax
​
    call edi
​
section .note.GNU-stack noalloc noexec nowrite progbits

tab: 2 4 8 wrap: off on

1	section .rodata
2
3	invalid_idt:
4	dd 0, 0
5
6	section .text
7
8	extern flush_irqs
9
10	global common_spinup
11	bits 32
12	common_spinup:
13	cli
14
15	lidt [invalid_idt]
16
17	call flush_irqs
18
19	xor eax, eax
20	lldt ax
21
22	; We don't need the return address
23	add esp, 4
24
25	; Get function address
26	pop edi
27
28	; We don't need the argument count
29	add esp, 4
30
31	mov eax, 0x00000011
32	mov cr0, eax
33
34	xor eax, eax
35	mov cr4, eax
36	mov cr3, eax
37
38	; Clear TSS busy bit and load TR with base 0, limit 0
39	sub esp, 8
40	sgdt [esp]
41	mov eax, [esp + 2]
42	add esp, 8
43	mov byte [eax + 0x3d], 0x89
44	mov ax, 0x38
45	ltr ax
46
47	call edi
48
49	section .note.GNU-stack noalloc noexec nowrite progbits