Self printing program in assembly (part 2)

.globl _start
        .type   _start, @function
_start:
        movl $_start, %esi
        xorl %edi, %edi
loop:
        movzb (%esi,%edi),%eax
        and  $0xf, %al
        cmp  $0xa, %al
        sbb  $0x69,%al
        das
        mov  $0x20, %dl
        shll $16, %edx
        orl %eax, %edx
        shll $0x8, %edx
        movzb (%esi,%edi),%eax
        shr  $0x4, %al
        cmp  $0xa, %al
        sbb  $0x69,%al
        das     
        orl %eax, %edx        
        movl %edx, (%esp)
        xorl %eax, %eax
        incl %eax
        movl %eax, %ebx
        shll $0x2, %eax
        movl %esp, %ecx
        movl %eax, %edx
        int $0x80
        incl %edi
        cmpl $69, %edi
        jle loop
        xorl %eax, %eax
        incl %eax
        int $0x80

Posted at 05:49PM Jun 15, 2007 by nike in Personal  |  Comments[0]