Linux driver编写思考
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相关文档：
例一：发送Signaling Packet：
Signaling Command是2个Bluetooth实体之间的L2CAP层命令传输。所以得Signaling Command使用CID 0x0001.
多个Command可以在一个C-frame（control frame）中发送。
如果要直接发送Signaling Command.需要建立SOCK_RAW类型的L2CAP连接Socket。这样才有机会自己填充Command Code，Identi ......
Shell是系统的用户界面，提供了用户与内核进行交互操作的一种接口。它接收用户输入的命令并把它送入内核去执行。
实际上Shell是一个命令解释器，它解释由用户输入的命令并且把它们送到内核。不仅如此，Shell有自己的编程语言用于对命令的编辑，它允许用户编写由shell命令组成的程序。Shell编程语言具有普通编程� ......
sys_execve
| - do_execve
|
| - search_binary_handler
|- linux_binfmt= elf_format
|- elf_format-> load_elf_binary
| -&nbs ......
七：kmem_cache_free（）的实现
kmem_cache_free用于把从slab中分配的对象释放掉，同分配一样，它首先会把它放到AC中，如果AC满了，则把对象释放到share链中，如果share也满了，也就把它释放至slab。来看具体的代码：
void kmem_cache_free (kmem_cache_t *cachep, void *objp)
{
unsi ......
