函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\include\asm\uaccess_32.h Create Date:2022-07-27 06:58:39
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：raw_copy_from_user

函数原型：static __always_inline unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n)

返回类型：unsigned long

参数：

类型参数名称
void *to
const void __user *from
unsigned longn
26  如果__builtin_constant_p(n)则
30  当:n恒等于1
31  ret等于0
32  __uaccess_begin_nospec()
33  __get_user_asm_nozero( * (u8 * )to, from, ret, "b", "b", "=q", 1)
35  __uaccess_end()
36  返回:ret
37  当:n恒等于2
38  ret等于0
39  __uaccess_begin_nospec()
40  __get_user_asm_nozero( * (u16 * )to, from, ret, "w", "w", "=r", 2)
42  __uaccess_end()
43  返回:ret
44  当:n恒等于4
45  ret等于0
46  __uaccess_begin_nospec()
47  __get_user_asm_nozero( * (u32 * )to, from, ret, "l", "k", "=r", 4)
49  __uaccess_end()
50  返回:ret
53  返回:__copy_user_ll(to, (__forceconstvoid * )from, n)
调用者
名称描述
copyin
_copy_from_user-of-line parts
__copy_from_user_inatomicArchitectures should provide two primitives (raw_copy_{to,from}_user())* and get rid of their private instances of copy_{to,from}_user() and* __copy_{to,from}_user{,_inatomic}().* raw_copy_{to,from}_user(to, from, size) should copy up to size bytes and
__copy_from_user