#include <stdio.h>

#include <unistd.h>

int main(){

    pid_t pid;

    asm volatile(

        "mov $0,%%ebx\n\t"

        "mov $0x2,%eax\n\t"

        "int 0x80\n\t"

        "mov %%eax,%0\n\t"

        :"=m"(tt)

    );

    if(pid==){

        printf("child is running..\n");

    }

    else{

        printf("father is running...\n");

    }

}

int read(int fd,char buf[],int len){

     int ret;

     asm volatile(

         "mov %3,%%edx\n\t" //count->edx

         "mov %2,%%ecx\n\t" //buf->ecx

         "mov %1,%%ebx\n\t" //fd->ebx

         "mov $0x3,%%eax\n\t"

         "int $0x80\n\t"

         :"=m"(ret)

         :"b"(fd),"c"(buf),"d"(count)

     );

     return ret;

}