Add comments to each line and explain its semantics in the context of the shellcode.

II 11 II 10 II 1 int 2 main (void) 3 { 4 5 asm__ ( 6 "jmp ahead " 7 "back: " 8 popl %ebx " 9 movl %ebx , 0x8%ebx) " xorl %eax , %eaxn" 11 movb %al, Ox7(%ebx) " movl %eax, Oxc%ebx) " 13 movl %eax, %edxIn" movl $0xb, %eax In" 15 movl Oxc%ebx). %ecxin" 16 int $0x80 " 17 "ahead: " 18 call back " 19 .string "/bin/sh" 20 ); 21 } 12 II 11 14 II 1 II 11 11 11 II 11 II 10 II 1 int 2 main (void) 3 { 4 5 asm__ ( 6 "jmp ahead " 7 "back: " 8 popl %ebx " 9 movl %ebx , 0x8%ebx) " xorl %eax , %eaxn" 11 movb %al, Ox7(%ebx) " movl %eax, Oxc%ebx) " 13 movl %eax, %edxIn" movl $0xb, %eax In" 15 movl Oxc%ebx). %ecxin" 16 int $0x80 " 17 "ahead: " 18 call back " 19 .string "/bin/sh" 20 ); 21 } 12 II 11 14 II 1 II 11 11 11