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  1. 	global _start
  2.  
  3. section .data
  4. 	buffer	dw	0h
  5. 	_toHex db "0123456789ABCDEF"
  6.  
  7. section .text
  8.  
  9. _start:
  10. 	xor edx, edx
  11. 	mov eax, 1
  12. 	mov ecx, 5; fac(5)
  13. 	call fac
  14. 	mov ecx, eax
  15. 	call toHex
  16. 	mov             ecx, buffer
  17.         mov             edx, 04h
  18.         call            write
  19. exit:
  20. 	mov		eax, 01h		; exit()
  21. 	xor		ebx, ebx		; errno
  22. 	int		80h
  23.  
  24.  
  25. read:
  26. 	mov		eax, 03h		; read()
  27. 	mov		ebx, 00h		; stdin
  28. 	int		80h
  29. 	ret
  30. write:
  31. 	mov		eax, 04h		; write()
  32. 	mov		ebx, 01h		; stdout
  33. 	int		80h
  34. 	ret
  35. fac:
  36. 	cmp ecx, 1
  37. 	jbe _facend
  38. 		mul ecx
  39. 		dec ecx
  40. 		call fac
  41. _facend:
  42. 		ret
  43. toHex:
  44. 	xor ebx, ebx
  45. 	mov al, cl
  46. 	and al, 01111b
  47. 	mov ah, cl
  48. 	shr ah, 4
  49. 	xor ebx, ebx
  50. 	mov bl, al
  51. 	xor edx, edx
  52. 	mov dh, byte [_toHex+ebx]
  53. 	xor ebx, ebx
  54. 	mov bl, ah
  55. 	mov dl, byte [_toHex+ebx]
  56. 	xor ecx, ecx
  57. 	mov cx, "0x"
  58. 	mov [buffer], cx
  59. 	mov [buffer+2], dx
  60. 	ret
Success #stdin #stdout 0.01s 100KB
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stdin
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Standard input is empty
stdout
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0x78
https://ideone.com/MrLzBM
language:
Assembler 32bit (nasm 2.14)
created:
11 years ago
visibility:
public

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