1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
; assembles with nasm to an 81-byte ELF binary that works on x86 Linux
bits 32
org $25430000
db $7F,"ELF" ; e_ident
dd 1 ; p_type
dd 0 ; p_offset
dd $$ ; p_vaddr
dw 2 ; e_type, p_paddr
dw 3 ; e_machine
dd entry ; e_version, p_filesz
dw (entry-$$)&0xffff ; e_entry, p_memsz
entry:
inc ebx
and eax,strict dword 4 ;nop
inc esi ; 1
inc edi ; 1
; 2
; 3
; 5
; 8
; ...
loop:
mov eax,esi
push 10
pop ebp
push ebp
jmp format
dw $20 ; e_phentsize
dw 1 ; e_phnum
format:
cdq
div ebp
inc ebx
dec esp
or edx,'0'
mov [esp],dl
test eax,eax
jnz format
print:
mov al,4
mov ecx,esp
mov edx,ebx
mov bl,1
int 0x80
;update fibbo
mov eax,edi
add edi,esi
xchg esi,eax
;exit on overflow
jno loop
xchg eax,ebx
int 0x80
|
