1                                 %line 1+1 screen_input.asm
     2                                 
     3                                 [section .data]
     4                                 LF equ 10
     5                                 NULL equ 0
     6                                 TRUE equ 1
     7                                 FALSE equ 0
     8                                 EXIT_SUCCESS equ 0
     9                                 STDIN equ 0
    10                                 STDOUT equ 1
    11                                 STDERR equ 2
    12                                 SYS_read equ 0
    13                                 SYS_write equ 1
    14                                 SYS_open equ 2
    15                                 SYS_close equ 3
    16                                 SYS_fork equ 57
    17                                 SYS_exit equ 60
    18                                 SYS_creat equ 85
    19                                 SYS_time equ 201
    20                                 
    21                                 STRLEN equ 9
    22                                 
    23 00000000 73616C76652C207075-    testo db "salve, puoi scrivere qui sotto:", LF, NULL
    24 00000000 6F6920736372697665-
    25 00000000 72652071756920736F-
    26 00000000 74746F3A0A00       
    27 00000021 0A0A00                 newline db LF, LF, NULL
    28                                 
    29                                 [section .bss]
    30 00000000 <gap>                  chr resb 1
    31 00000001 <gap>                  inputline resb STRLEN
    32                                 
    33                                 [section .text]
    34                                 [global _start]
    35                                 _start:
    36                                 
    37                                 
    38 00000000 48C7C7[00000000]       mov rdi, testo
    39 00000007 E862000000             call printstring
    40                                 
    41                                 
    42 0000000C 48C7C3[00000000]       mov rbx, inputline
    43 00000013 49C7C400000000         mov r12, 0
    44                                 
    45                                 ReadCharacters:
    46 0000001A 48C7C000000000         mov rax, SYS_read
    47 00000021 48C7C700000000         mov rdi, STDIN
    48 00000028 488D3425[00000000]     lea rsi, byte[chr]
    49 00000030 48C7C201000000         mov rdx, 1
    50 00000037 0F05                   syscall
    51                                 
    52 00000039 8A0425[00000000]       mov al, byte[chr]
    53                                 
    54 00000040 3C0A                   cmp al, LF
    55 00000042 740E                   je ReadDone
    56                                 
    57 00000044 49FFC4                 inc r12
    58 00000047 4983FC09               cmp r12, STRLEN
    59 0000004B 73CB                   jae ReadCharacters
    60 0000004D 8803                   mov byte[rbx], al
    61 0000004F 48FFC3                 inc rbx
    62                                 
    63 00000052 EBC4                   jmp ReadCharacters
    64                                 
    65                                 ReadDone:
    66 00000054 C60300                 mov byte[rbx], NULL
    67                                 
    68 00000057 48C7C7[00000000]       mov rdi, inputline
    69 0000005E E80B000000             call printstring
    70                                 
    71 00000063 48C7C03C000000         mov rax, SYS_exit
    72 0000006A 48C7C700000000         mov rdi, EXIT_SUCCESS
    73 00000071 0F05                   syscall
    74                                 
    75                                 
    76                                 
    77                                 
    78                                 [global printstring]
    79                                 printstring:
    80                                 
    81 00000073 53                     push rbx
    82 00000074 4889FB                 mov rbx, rdi
    83 00000077 48C7C200000000         mov rdx, 0
    84                                 
    85                                 stringcountloop:
    86 0000007E 803B00                 cmp byte [rbx], NULL
    87 00000081 7406                   je stringcountdone
    88 00000083 48FFC2                 inc rdx
    89 00000086 48FFC3                 inc rbx
    90 00000089 EBF1                   jmp stringcountloop
    91                                 stringcountdone:
    92 0000008B 4883FA00               cmp rdx, NULL
    93 0000008F 7411                   je printdone
    94                                 
    95 00000091 48C7C001000000         mov rax, SYS_write
    96 00000098 4889FE                 mov rsi, rdi
    97 0000009B 48C7C701000000         mov rdi, STDOUT
    98 000000A2 0F05                   syscall
    99                                 
   100                                 printdone:
   101 000000A4 5B                     pop rbx
   102 000000A5 C3                     ret
   103