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
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_COMPILER_TYPES_H
#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
#endif
/* Compiler specific definitions for Clang compiler */
/*
* Clang prior to 17 is being silly and considers many __cleanup() variables
* as unused (because they are, their sole purpose is to go out of scope).
*
* https://reviews.llvm.org/D152180
*/
#undef __cleanup
#define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func)))
/* same as gcc, this was present in clang-2.6 so we can assume it works
* with any version that can compile the kernel
*/
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
/* all clang versions usable with the kernel support KASAN ABI version 5 */
#define KASAN_ABI_VERSION 5
/*
* Note: Checking __has_feature(*_sanitizer) is only true if the feature is
* enabled. Therefore it is not required to additionally check defined(CONFIG_*)
* to avoid adding redundant attributes in other configurations.
*/
#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
/* Emulate GCC's __SANITIZE_ADDRESS__ flag */
#define __SANITIZE_ADDRESS__
#define __no_sanitize_address \
__attribute__((no_sanitize("address", "hwaddress")))
#else
#define __no_sanitize_address
#endif
#if __has_feature(thread_sanitizer)
/* emulate gcc's __SANITIZE_THREAD__ flag */
#define __SANITIZE_THREAD__
#define __no_sanitize_thread \
__attribute__((no_sanitize("thread")))
#else
#define __no_sanitize_thread
#endif
#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP)
#define __HAVE_BUILTIN_BSWAP32__
#define __HAVE_BUILTIN_BSWAP64__
#define __HAVE_BUILTIN_BSWAP16__
#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
#if __has_feature(undefined_behavior_sanitizer)
/* GCC does not have __SANITIZE_UNDEFINED__ */
#define __no_sanitize_undefined \
__attribute__((no_sanitize("undefined")))
#else
#define __no_sanitize_undefined
#endif
#if __has_feature(memory_sanitizer)
#define __SANITIZE_MEMORY__
/*
* Unlike other sanitizers, KMSAN still inserts code into functions marked with
* no_sanitize("kernel-memory"). Using disable_sanitizer_instrumentation
* provides the behavior consistent with other __no_sanitize_ attributes,
* guaranteeing that __no_sanitize_memory functions remain uninstrumented.
*/
#define __no_sanitize_memory __disable_sanitizer_instrumentation
/*
* The __no_kmsan_checks attribute ensures that a function does not produce
* false positive reports by:
* - initializing all local variables and memory stores in this function;
* - skipping all shadow checks;
* - passing initialized arguments to this function's callees.
*/
#define __no_kmsan_checks __attribute__((no_sanitize("kernel-memory")))
#else
#define __no_sanitize_memory
#define __no_kmsan_checks
#endif
/*
* Support for __has_feature(coverage_sanitizer) was added in Clang 13 together
* with no_sanitize("coverage"). Prior versions of Clang support coverage
* instrumentation, but cannot be queried for support by the preprocessor.
*/
#if __has_feature(coverage_sanitizer)
#define __no_sanitize_coverage __attribute__((no_sanitize("coverage")))
#else
#define __no_sanitize_coverage
#endif
#if __has_feature(shadow_call_stack)
# define __noscs __attribute__((__no_sanitize__("shadow-call-stack")))
#endif
#if __has_feature(kcfi)
/* Disable CFI checking inside a function. */
#define __nocfi __attribute__((__no_sanitize__("kcfi")))
#endif
/*
* Turn individual warnings and errors on and off locally, depending
* on version.
*/
#define __diag_clang(version, severity, s) \
__diag_clang_ ## version(__diag_clang_ ## severity s)
/* Severity used in pragma directives */
#define __diag_clang_ignore ignored
#define __diag_clang_warn warning
#define __diag_clang_error error
#define __diag_str1(s) #s
#define __diag_str(s) __diag_str1(s)
#define __diag(s) _Pragma(__diag_str(clang diagnostic s))
#if CONFIG_CLANG_VERSION >= 110000
#define __diag_clang_11(s) __diag(s)
#else
#define __diag_clang_11(s)
#endif
#define __diag_ignore_all(option, comment) \
__diag_clang(11, ignore, option)
|
