C语言和汇编语言获取linux系统时间

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main() {
time_t tt;
struct tm *t;
tt = time(NULL) ;
t = localtime(&tt);
printf("time: %d-%d -%d  %d : %d : %d \n", t->tm_year + 1900, t->tm_mon,
t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
return 0;

}

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

int main(int argc, char *argv[])
{
time_t tt;
struct tm *t;
asm volatile(
"mov $0,%%ebx\n\t"
"mov $0xd,%%eax\n\t"
"int $0x80\n\t"
"mov %%eax,%0\n\t"
: "=m" (tt)
);
t = localtime(&tt);
printf("time:%d:%d:%d:%d:%d:%d\n",t->tm_year+1900, t->tm_mon, t->tm_mday, t->tm_hour, t->tm_min, t->tm_sec);
return 0;
}