Bimyl的博客

驱动开发-atexit – 程序终止时释放空间void function(void) { printf("1\n"); } void function1(void) { printf("2\n"); } int main(int argc,char \*argv[]) { printf("duang\n"); atexit(function); printf(

字符设备驱动1 vi X86_64-linux-gnu/asm/unistd.h 函数的调用 open SYSCALL_DEFINE3() sys_open(char *filename,inflag) do_sys_open() do_file_open() path_openat do_tmpfile \return fd finish_open do_d

字符设备驱动2 readl和writel 读寄存器的值，写寄存器的值 writel(readl(gpd0con) & (~(0xf << 0)) | (0x2 << 0)); void __iomen *timer_base timer_base = ioremap(0x100,0x4); timer_base += 0x4; 加多少就是多少 内存之间的拷贝（用