1                                 %line 1+1 write_file.asm
     2                                 
     3                                 
     4                                 
     5                                 [section .data]
     6                                 LF equ 10
     7                                 NULL equ 0
     8                                 TRUE equ 1
     9                                 FALSE equ 0
    10                                 EXIT_SUCCESS equ 0
    11                                 STDIN equ 0
    12                                 STDOUT equ 1
    13                                 STDERR equ 2
    14                                 SYS_read equ 0
    15                                 SYS_write equ 1
    16                                 SYS_open equ 2
    17                                 SYS_close equ 3
    18                                 SYS_fork equ 57
    19                                 SYS_exit equ 60
    20                                 SYS_creat equ 85
    21                                 SYS_time equ 201
    22                                 O_CREAT equ 0x40
    23                                 O_TRUNC equ 0x200
    24                                 O_APPEND equ 0x400
    25                                 O_RDONLY equ 0
    26                                 O_WRONLY equ 1
    27                                 O_RDWR equ 2
    28                                 S_IRUSR equ 400
    29                                 S_IWUSR equ 200
    30                                 S_IXUSR equ 100
    31                                 
    32 00000000 0A0A00                 newline db LF, LF, NULL
    33 00000003 0A66696C6520777269-    header db LF, "file write test", LF, NULL
    34 00000003 746520746573740A00 
    35 00000015 75726C2E74787400       filename db "url.txt", NULL
    36 0000001D 2F686F6D652F726E7A-    url db "/home/rnzuser/Scrivania", LF, NULL
    37 0000001D 757365722F53637269-
    38 0000001D 76616E69610A00     
    39 00000036 1800000000000000       len dq $-url-1
    40 0000003E 736372697474757261-    writedone db "scrittura completata!", LF, NULL
    41 0000003E 20636F6D706C657461-
    42 0000003E 7461210A00         
    43 00000055 0000000000000000       filedescript dq 0
    44 0000005D 6572726F7265206E65-    erroropenmsg db "errore nell'apertura del file ", LF, NULL
    45 0000005D 6C6C27617065727475-
    46 0000005D 72612064656C206669-
    47 0000005D 6C65200A00         
    48 0000007D 6669696C6520777269-    errorwritemsg db "fiile writing error", LF, NULL
    49 0000007D 74696E67206572726F-
    50 0000007D 720A00             
    51                                 
    52                                 [section .text]
    53                                 [global _start]
    54                                 _start:
    55                                 
    56 00000000 48C7C7[00000000]       mov rdi, header
    57 00000007 E89D000000             call printstring
    58                                 
    59                                 
    60 0000000C 48C7C7[00000000]       mov rdi, header
    61 00000013 E891000000             call printstring
    62                                 
    63                                 
    64                                 
    65                                 
    66                                 
    67                                 
    68                                 
    69                                 
    70                                 
    71                                 
    72                                 
    73                                 
    74                                 
    75                                 
    76                                 openinputfile:
    77 00000018 48C7C055000000         mov rax, SYS_creat
    78 0000001F 48C7C7[00000000]       mov rdi, filename
    79 00000026 48C7C680010000         mov rsi, S_IRUSR | S_IWUSR
    80 0000002D 0F05                   syscall
    81                                 
    82 0000002F 4883F800               cmp rax, 0
    83 00000033 7C4B                   jl erroronopen
    84                                 
    85 00000035 48890425[00000000]     mov qword[filedescript], rax
    86                                 
    87                                 
    88                                 
    89                                 
    90                                 
    91                                 
    92                                 
    93                                 
    94                                 
    95                                 
    96                                 
    97                                 
    98 0000003D 48C7C001000000         mov rax, SYS_write
    99 00000044 488B3C25[00000000]     mov rdi, qword[filedescript]
   100 0000004C 48C7C6[00000000]       mov rsi, url
   101 00000053 488B1425[00000000]     mov rdx, qword[len]
   102 0000005B 0F05                   syscall
   103                                 
   104 0000005D 4883F800               cmp rax, 0
   105 00000061 7C2B                   jl erroronwrite
   106                                 
   107 00000063 48C7C7[00000000]       mov rdi, writedone
   108 0000006A E83A000000             call printstring
   109                                 
   110                                 
   111                                 
   112                                 
   113                                 
   114                                 
   115 0000006F 48C7C003000000         mov rax, SYS_close
   116 00000076 488B3C25[00000000]     mov rdi, qword[filedescript]
   117 0000007E 0F05                   syscall
   118                                 
   119 00000080 EB1A                   jmp FATTO
   120                                 
   121                                 erroronopen:
   122 00000082 48C7C7[00000000]       mov rdi, erroropenmsg
   123 00000089 E81B000000             call printstring
   124                                 
   125 0000008E EB0C                   jmp FATTO
   126                                 
   127                                 erroronwrite:
   128 00000090 48C7C7[00000000]       mov rdi, errorwritemsg
   129 00000097 E80D000000             call printstring
   130                                 
   131 0000009C EBFE                   jmp FATTO
   132                                 
   133                                 FATTO:
   134 0000009E 48C7C03C000000         mov rax, SYS_exit
   135 000000A5 48C7C700000000         mov rdi, EXIT_SUCCESS
   136 000000AC 0F05                   syscall
   137                                 
   138                                 
   139                                 
   140                                 [global printstring]
   141                                 printstring:
   142                                 
   143 000000AE 55                     push rbp
   144 000000AF 4889E5                 mov rbp, rsp
   145 000000B2 53                     push rbx
   146                                 
   147                                 
   148 000000B3 4889FB                 mov rbx, rdi
   149 000000B6 48C7C200000000         mov rdx, 0
   150                                 stringcountloop:
   151 000000BD 803B00                 cmp byte[rbx], NULL
   152 000000C0 7406                   je stringcountdone
   153 000000C2 48FFC2                 inc rdx
   154 000000C5 48FFC3                 inc rbx
   155 000000C8 EBF1                   jmp stringcountloop
   156                                 
   157                                 stringcountdone
   158 000000CA 4883FA00               cmp rdx, 0
   159 000000CE 7411                   je printdone
   160                                 
   161                                 
   162                                 
   163 000000D0 48C7C001000000         mov rax, SYS_write
   164 000000D7 4889FE                 mov rsi, rdi
   165 000000DA 48C7C701000000         mov rdi, STDOUT
   166 000000E1 0F05                   syscall
   167                                 
   168                                 printdone:
   169 000000E3 5B                     pop rbx
   170 000000E4 5D                     pop rbp
   171 000000E5 C3                     ret
   172                                 
   173                                 
   174                                 
   175                                 
   176                                 
   177