WUT_Computer_Science/ECOAR/x86/C/asm_part.lst

     1                                  section	.text
     2                                  global hello_world     ;must be declared for linker (ld)
     3                                  
     4                                  hello_world:	          ;tells linker entry point
     5                                  
     6 00000000 55                        push ebp
     7 00000001 89E5                      mov ebp,esp
     8 00000003 53                        push ebx
     9                                  
    10 00000004 BA0E000000                mov	edx,len     ;message length
    11 00000009 B9[00000000]              mov	ecx,msg     ;message to write
    12 0000000E BB01000000                mov	ebx,1       ;file descriptor (stdout)
    13 00000013 B804000000                mov	eax,4       ;system call number (sys_write)
    14 00000018 CD80                      int	0x80        ;call kernel
    15                                  
    16 0000001A 5B                        pop ebx
    17 0000001B 89EC                      mov esp, ebp
    18 0000001D 5D                        pop ebp
    19 0000001E C3                        ret
    20                                  
    21                                  ;mov	eax,1       ;system call number (sys_exit)
    22                                  ;int	0x80        ;call kernel
    23                                  
    24                                  section	.data
    25 00000000 48656C6C6F2C20776F-     msg db 'Hello, world!', 0xa  ;string to be printed
    25 00000009 726C64210A         
    26                                  len equ $ - msg     ;length of the string