The buffer address is actually a user-space buffer, so you won't be able to read it directly.

缓冲区地址实际上是一个用户空间的缓冲区，因此我们不能直接读取它。

youdao

The strnlen_user function takes two arguments: the user space buffer address and the maximum length to check.

strnlen_user函数带有两个参数：用户空间缓冲区地址和要检查的最大长度。

youdao

For each line in the line buffer for a CU, we need to check for the low address match to find the first line number.

要获得 CU 的行缓冲的每一行，我们需要检查低位地址匹配以找到函数的第一行的行号。

youdao