Lo zero della vergogna...

804835a:    c6 46 07 00          movb   $0x0,0x7(%esi)
804835e:    c7 46 0c 00 00 00 00 movl   $0x0,0xc(%esi)
8048365:    b8 0b 00 00 00       mov    $0xb,%eax

movb $0x0, 0x7(%esi) ---  xorl %eax, %eax  ---> XOR fra 2 cose fa 0
                          movb %eax, 0x7(%esi)

movl $0x0, 0xc(%esi) ---  xorl %eax, %eax
                          movl %eax, 0xc(%esi)

movl $0xb, %eax ---  movb $0xb, %al ----------> AL e' la parte LOW di EAX