用C语言实现linux下非root用户获取系统CPU的id

    #include <stdio.h>       
    char *cpu_id(char *id)  
    {  
        //char s[30];  
        unsigned   long   s1,s2,s3,s4;    
        char   sel;     
        asm volatile     
        ( "movl $0x01 , %%eax ; \n\t"  
        "xorl %%edx , %%edx ;\n\t"  
        "cpuid ;\n\t"   
        "movl %%edx ,%0 ;\n\t"  
        "movl %%eax ,%1 ; \n\t"  
        :"=m"(s1),"=m"(s2)  
        );        
        //printf("%08X-%08X-",s1,s2);  
        asm volatile     
        ("movl $0x03,%%eax ;\n\t"  
        "xorl %%ecx,%%ecx ;\n\t"  
        "xorl %%edx,%%edx ;\n\t"  
        "cpuid ;\n\t"  
        "movl %%edx,%0 ;\n\t"  
        "movl %%ecx,%1 ;\n\t"  
        :"=m"(s3),"=m"(s4)  
        );     
        // printf("%08X-%08X \n",s3,s4);     
        sprintf(id,"%08X-%08X-%08X-%08X",s1,s2,s3,s4);  
        printf("***%s***\n",id);  
        return id;  
    }  
    int   main(int   argc,   char*   argv[])     
    {     
        char id[30];  
        cpu_id(id);  
        printf("%s\n",id);  
        return   0;     
    }