CPUID : CPU 名

プロセッサ名取得を行う。

#include <stdio.h> 

void cpuid(int op, int *eax, int *ebx, int *ecx, int *edx){
  __asm__ __volatile__ ("cpuid"
                          : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
                          : "a" (op) : "cc");
}

char *get_cpu_name(void) {
  int eax, ebx, ecx, edx;
  static int name[12] = {0};
  cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
  if ( (eax & 0xffff) >= 4 ) {
    cpuid(0x80000002, &name[0], &name[1], &name[ 2], &name[ 3]);
    cpuid(0x80000003, &name[4], &name[5], &name[ 6], &name[ 7]);
    cpuid(0x80000004, &name[8], &name[9], &name[10], &name[11]);
  }
  return (char *)name;
}

int main(void) {
  printf("CPU name\t: %s\n", get_cpu_name());
  return 0;
}