读IDTR与GDTR的值

最新推荐文章于 2022-09-14 18:48:48 发布

W1nds

最新推荐文章于 2022-09-14 18:48:48 发布

阅读量1.2w

点赞数

分类专栏： VC/C/C++

VC/C/C++ 专栏收录该内容

36 篇文章

订阅专栏

本文探讨了如何使用C++代码设置多核CPU的线程关联性，通过SetThreadAffinityMask函数实现线程与CPU核心的绑定，并展示了如何读取IDT和GDT的内存限制。通过代码实例，读者可以理解多核环境下内存管理的关键概念。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

转自油条智辅论坛

#include "stdafx.h"
#include <Windows.h>


int _tmain(int argc, _TCHAR* argv[])
{
	char idtr[6]={0};
    char gdtr[6]={0};
	SetThreadAffinityMask(GetCurrentThread(),1);
    __asm
	{
		sidt idtr
		sgdt gdtr
	}
	printf("idt limit is %.4x,base is %.8x\n",*(unsigned short *)idtr,*(unsigned int *)(idtr+2));
	printf("gdt limit is %.4x,base is %.8x\n",*(unsigned short *)gdtr,*(unsigned int *)(gdtr+2));
	SetThreadAffinityMask(GetCurrentThread(),2);
	__asm
	{
		sidt idtr
		sgdt gdtr
	}
	printf("idt limit is %.4x,base is %.8x\n",*(unsigned short *)idtr,*(unsigned int *)(idtr+2));
	printf("gdt limit is %.4x,base is %.8x\n",*(unsigned short *)gdtr,*(unsigned int *)(gdtr+2));
	return 0;
}

SetThreadAffinityMask设置使用多核CPU的哪个核心