如何在Linux系统中获取机器序列号和CPU ID?
示例代码受到高度赞赏。
这是Linux内核似乎使用的内容:
static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx) { /* ecx is often an input as well as an output. */ asm volatile("cpuid" : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx) : "0" (*eax), "2" (*ecx)); }
然后可以将其用作例如:
#include <stdio.h> int main(int argc, char **argv) { unsigned eax, ebx, ecx, edx; eax = 1; /* processor info and feature bits */ native_cpuid(&eax, &ebx, &ecx, &edx); printf("stepping %d\n", eax & 0xF); printf("model %d\n", (eax >> 4) & 0xF); printf("family %d\n", (eax >> 8) & 0xF); printf("processor type %d\n", (eax >> 12) & 0x3); printf("extended model %d\n", (eax >> 16) & 0xF); printf("extended family %d\n", (eax >> 20) & 0xFF); /* EDIT */ eax = 3; /* processor serial number */ native_cpuid(&eax, &ebx, &ecx, &edx); /** see the CPUID Wikipedia article on which models return the serial number in which registers. The example here is for Pentium III */ printf("serial number 0x%08x%08x\n", edx, ecx); }
这篇Wikipedia文章中有关如何使用该CPUID指令的很好参考。
CPUID
编辑 Wikipedia文章说,序列号是随Pentium III一起引入的,但是由于隐私问题,以后的型号中不再使用该序列号。在Linux系统上,您可以通过执行以下操作检查此功能(PSN位)是否存在:
grep -i --color psn /proc/cpuinfo
如果未显示任何内容,则您的系统不支持处理器序列号。