forked from SerenityOS/serenity
-
Notifications
You must be signed in to change notification settings - Fork 0
/
StdLib.h
168 lines (146 loc) · 7.08 KB
/
StdLib.h
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
/*
* Copyright (c) 2018-2020, Andreas Kling <[email protected]>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Checked.h>
#include <AK/Forward.h>
#include <AK/Time.h>
#include <AK/Userspace.h>
#include <Kernel/UnixTypes.h>
namespace Syscall {
struct StringArgument;
}
[[nodiscard]] String copy_string_from_user(const char*, size_t);
[[nodiscard]] String copy_string_from_user(Userspace<const char*>, size_t);
[[nodiscard]] Optional<Time> copy_time_from_user(const timespec*);
[[nodiscard]] Optional<Time> copy_time_from_user(const timeval*);
template<typename T>
[[nodiscard]] Optional<Time> copy_time_from_user(Userspace<T*> src);
[[nodiscard]] Optional<u32> user_atomic_fetch_add_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_exchange_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_load_relaxed(volatile u32* var);
[[nodiscard]] bool user_atomic_store_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<bool> user_atomic_compare_exchange_relaxed(volatile u32* var, u32& expected, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_not_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_or_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_xor_relaxed(volatile u32* var, u32 val);
extern "C" {
[[nodiscard]] bool copy_to_user(void*, const void*, size_t);
[[nodiscard]] bool copy_from_user(void*, const void*, size_t);
[[nodiscard]] bool memset_user(void*, int, size_t);
void* memcpy(void*, const void*, size_t);
[[nodiscard]] int strncmp(const char* s1, const char* s2, size_t n);
[[nodiscard]] char* strstr(const char* haystack, const char* needle);
[[nodiscard]] int strcmp(char const*, const char*);
[[nodiscard]] size_t strlen(const char*);
[[nodiscard]] size_t strnlen(const char*, size_t);
void* memset(void*, int, size_t);
[[nodiscard]] int memcmp(const void*, const void*, size_t);
void* memmove(void* dest, const void* src, size_t n);
const void* memmem(const void* haystack, size_t, const void* 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 bool 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 bool 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 bool 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 bool 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"))) bool copy_from_user<T>(T*, const T*) \
{ \
VERIFY_NOT_REACHED(); \
} \
template<> \
[[nodiscard]] inline __attribute__((deprecated("use " #REPLACEMENT " instead"))) bool copy_from_user<T>(T*, Userspace<const T*>) \
{ \
VERIFY_NOT_REACHED(); \
} \
template<> \
[[nodiscard]] inline __attribute__((deprecated("use " #REPLACEMENT " instead"))) bool 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 bool 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 bool copy_to_user(Userspace<T*> dest, const void* src, size_t size)
{
static_assert(IsTriviallyCopyable<T>);
return copy_to_user(dest.unsafe_userspace_ptr(), src, size);
}
template<typename T>
[[nodiscard]] inline bool 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 bool copy_n_from_user(T* dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return copy_from_user(dest, src, sizeof(T) * count);
}
template<typename T>
[[nodiscard]] inline bool copy_n_to_user(T* dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return copy_to_user(dest, src, sizeof(T) * count);
}
template<typename T>
[[nodiscard]] inline bool copy_n_from_user(T* dest, Userspace<const T*> src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return copy_from_user(dest, src.unsafe_userspace_ptr(), sizeof(T) * count);
}
template<typename T>
[[nodiscard]] inline bool copy_n_to_user(Userspace<T*> dest, const T* src, size_t count)
{
static_assert(IsTriviallyCopyable<T>);
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return copy_to_user(dest.unsafe_userspace_ptr(), src, sizeof(T) * count);
}