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  1.    section    .data
  2.  
  3. msg: db "The number of command line arguments is "
  4. len	equ	$ - msg			;length of our dear string
  5. char db 'character'
  6. charlen db $ - char
  7. ;
  8.     SECTION .bss
  9. cline:resb 81    ;space to hold command line arguments for output for argc
  10. result:resb 20    ;space to hold command line arguments for output for argv[0]
  11. ;
  12.  
  13. section	.text
  14.     global main         ;must be declared for using gcc
  15. ;
  16. main:	                ;tell linker entry point
  17.   ;  
  18.   mov ecx,0          ;count output characters
  19.   pop eax            ;reject this 32 bits
  20.   pop eax    :        ;get argc
  21.   add al, 30H        ;convert integer to ascii
  22.   mov edi, cline     ;put char in output buffer cline
  23.   mov byte[edi],al   ;move argc into edi memory address
  24.  inc ecx            ;increment char count
  25.  inc edi            ;increment pointer to o/p buffer 
  26.  mov al, 0aH        ;LF to end line
  27.  mov byte[edi],al   ;put it at end of output line
  28.  inc ecx            ;increment output char count
  29.  
  30.  pop eax            ;get argv[0]
  31.  cmp eax,0
  32.  jz message
  33.  add eax,0
  34.  add al, 30H       ;convert integer to ascii
  35.  mov edi, result    ;put char in output buffer result
  36.  mov byte[edi],al   ;move argv[0] into edi memory address
  37.  inc ecx            ;increment output char count
  38.  inc edi            ;increment pointer to o/p buffer
  39.  
  40.  message:
  41.  mov edx,len        ;length of string to write
  42.  mov ecx,msg        ;addr of string
  43.  mov ebx, 1         ;file descriptor 1 = stdout
  44.  mov eax, 4         ;"write" system call
  45.  int 0x80           ;call the kernel
  46.  ;
  47.  
  48.  pop edx            ;restore char count into edx for system call
  49.  mov ecx,cline      ;address of string
  50.  mov ebx, 1         ;file descriptor 1=stdout
  51.  mov eax, 4         ;"write" system call
  52.  int 0x80           ;call the kernel
  53.  
  54.  ;
  55.  mov edx,charlen    ;length of string to write
  56.  mov ecx,char       ;addr of string
  57.  mov ebx, 1         ;file descriptor 1 = stdout
  58.  mov eax, 4         ;"write" system call
  59.  int 0x80           ;call the kernel
  60.  ;
  61.  pop edx            ;restore char count into edx for system call
  62.  mov ecx,result      ;address of string
  63.  mov ebx, 1         ;file descriptor 1=stdout
  64.  mov eax, 4         ;"write" system call
  65.  int 0x80           ;call the kernel
  66.  ;
  67.  
  68.  mov ebx, 0         ;exit with error code 0
  69.  mov eax, 1         ;"exit" system call
  70.  int 0x80           ;call the kernel
Success #stdin #stdout 0.01s 5280KB
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The number of command line arguments is
https://ideone.com/PFTJxe
language:
Assembler 32bit (nasm 2.14)
created:
27 days ago
visibility:
public

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