【LinuxC】GCC编译C程序,关闭随机基址

时间:2023-01-15 04:53:19

1、编译、链接和运行程序

C代码示例:

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

int main()
{
    printf("hello world!\n");

    exit(0);

}

编译运行参数如下:

[root@localhost Desktop]# gcc -o hello hello.c
[root@localhost Desktop]# ./hello

2、关闭内存地址随机化机制(alsr)

  • 关闭

    [root@localhost Desktop]# echo 0 >/proc/sys/kernel/randomize_va_space   
  • 开启

    [root@localhost Desktop]# echo 1 >/proc/sys/kernel/randomize_va_space   

C测试示例代码:

#include <stdio.h>
unsigned long sp(void){ asm("mov %rsp, %rax");}  

int main(void)  
{
    unsigned long esp = sp();  
    printf("Stack pointer (ESP : 0x%lx)\n",esp);  
    return 0;
}