1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Checked.h>
#include <AK/Error.h>
#include <AK/Forward.h>
#include <AK/Time.h>
#include <AK/Userspace.h>
#include <Kernel/KString.h>
#include <Kernel/UnixTypes.h>
ErrorOr<NonnullOwnPtr<Kernel::KString>> try_copy_kstring_from_user(Userspace<char const*>, size_t);
ErrorOr<Time> copy_time_from_user(timespec const*);
ErrorOr<Time> copy_time_from_user(timeval const*);
template<typename T>
ErrorOr<Time> copy_time_from_user(Userspace<T*>);
[[nodiscard]] Optional<u32> user_atomic_fetch_add_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_exchange_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_load_relaxed(u32 volatile* var);
[[nodiscard]] bool user_atomic_store_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<bool> user_atomic_compare_exchange_relaxed(u32 volatile* var, u32& expected, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_not_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_or_relaxed(u32 volatile* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_xor_relaxed(u32 volatile* var, u32 val);
ErrorOr<void> copy_to_user(void*, void const*, size_t);
ErrorOr<void> copy_from_user(void*, void const*, size_t);
ErrorOr<void> memset_user(void*, int, size_t);
extern "C" {
void* memcpy(void*, void const*, size_t);
[[nodiscard]] int strncmp(char const* s1, char const* s2, size_t n);
[[nodiscard]] char* strstr(char const* haystack, char const* needle);
[[nodiscard]] int strcmp(char const*, char const*);
[[nodiscard]] size_t strlen(char const*);
[[nodiscard]] size_t strnlen(char const*, size_t);
void* memset(void*, int, size_t);
[[nodiscard]] int memcmp(void const*, void const*, size_t);
void* memmove(void* dest, void const* src, size_t n);
void const* memmem(void const* haystack, size_t, void const* needle, size_t);
[[nodiscard]] inline u16 ntohs(u16 w) { return (w & 0xff) << 8 | ((w >> 8) & 0xff); }
[[nodiscard]] inline u16 htons(u16 w) { return (w & 0xff) << 8 | ((w >> 8) & 0xff); }
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_from_user(T* dest, const T* src)
{
static_assert(IsTriviallyCopyable<T>);
return copy_from_user(dest, src, sizeof(T));
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_to_user(T* dest, const T* src)
{
static_assert(IsTriviallyCopyable<T>);
return copy_to_user(dest, src, sizeof(T));
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_from_user(T* dest, Userspace<const T*> src)
{
static_assert(IsTriviallyCopyable<T>);
return copy_from_user(dest, src.unsafe_userspace_ptr(), sizeof(T));
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_from_user(T* dest, Userspace<T*> src)
{
static_assert(IsTriviallyCopyable<T>);
return copy_from_user(dest, src.unsafe_userspace_ptr(), sizeof(T));
}
#define DEPRECATE_COPY_FROM_USER_TYPE(T, REPLACEMENT) \
template<> \
[[nodiscard]] inline __attribute__((deprecated("use " #REPLACEMENT " instead"))) ErrorOr<void> copy_from_user<T>(T*, const T*) \
{ \
VERIFY_NOT_REACHED(); \
} \
template<> \
[[nodiscard]] inline __attribute__((deprecated("use " #REPLACEMENT " instead"))) ErrorOr<void> copy_from_user<T>(T*, Userspace<const T*>) \
{ \
VERIFY_NOT_REACHED(); \
} \
template<> \
[[nodiscard]] inline __attribute__((deprecated("use " #REPLACEMENT " instead"))) ErrorOr<void> copy_from_user<T>(T*, Userspace<T*>) \
{ \
VERIFY_NOT_REACHED(); \
}
DEPRECATE_COPY_FROM_USER_TYPE(timespec, copy_time_from_user)
DEPRECATE_COPY_FROM_USER_TYPE(timeval, copy_time_from_user)
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_to_user(Userspace<T*> dest, const T* src)
{
static_assert(IsTriviallyCopyable<T>);
return copy_to_user(dest.unsafe_userspace_ptr(), src, sizeof(T));
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_to_user(Userspace<T*> dest, void const* src, size_t size)
{
static_assert(IsTriviallyCopyable<T>);
return copy_to_user(dest.unsafe_userspace_ptr(), src, size);
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_from_user(void* dest, Userspace<const T*> src, size_t size)
{
static_assert(IsTriviallyCopyable<T>);
return copy_from_user(dest, src.unsafe_userspace_ptr(), size);
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_n_from_user(T* dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked<size_t> size = sizeof(T);
size *= count;
if (size.has_overflow())
return EOVERFLOW;
return copy_from_user(dest, src, size.value());
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_n_to_user(T* dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked<size_t> size = sizeof(T);
size *= count;
if (size.has_overflow())
return EOVERFLOW;
return copy_to_user(dest, src, size.value());
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> copy_n_from_user(T* dest, Userspace<const T*> src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked<size_t> size = sizeof(T);
size *= count;
if (size.has_overflow())
return EOVERFLOW;
return copy_from_user(dest, src.unsafe_userspace_ptr(), size.value());
}
template<typename T>
[[nodiscard]] inline ErrorOr<void> try_copy_n_to_user(Userspace<T*> dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked<size_t> size = sizeof(T);
size *= count;
if (size.has_overflow())
return EOVERFLOW;
return copy_to_user(dest.unsafe_userspace_ptr(), src, size.value());
}
template<typename T>
inline ErrorOr<T> copy_typed_from_user(Userspace<T const*> user_data)
{
T data {};
TRY(copy_from_user(&data, user_data));
return data;
}
|
