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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
d1515582 | 2 | #ifndef __LINUX_COMPILER_TYPES_H |
565cbdc2 MC |
3 | #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." |
4 | #endif | |
5 | ||
3e2ffd65 MT |
6 | /* Compiler specific definitions for Clang compiler */ |
7 | ||
54da6a09 PZ |
8 | /* |
9 | * Clang prior to 17 is being silly and considers many __cleanup() variables | |
10 | * as unused (because they are, their sole purpose is to go out of scope). | |
11 | * | |
fafdea34 | 12 | * https://github.com/llvm/llvm-project/commit/877210faa447f4cc7db87812f8ed80e398fedd61 |
54da6a09 PZ |
13 | */ |
14 | #undef __cleanup | |
15 | #define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func))) | |
16 | ||
53a98ed7 PL |
17 | /* all clang versions usable with the kernel support KASAN ABI version 5 */ |
18 | #define KASAN_ABI_VERSION 5 | |
19 | ||
540540d0 ME |
20 | /* |
21 | * Note: Checking __has_feature(*_sanitizer) is only true if the feature is | |
22 | * enabled. Therefore it is not required to additionally check defined(CONFIG_*) | |
23 | * to avoid adding redundant attributes in other configurations. | |
24 | */ | |
25 | ||
2bd926b4 | 26 | #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) |
5cbaefe9 | 27 | /* Emulate GCC's __SANITIZE_ADDRESS__ flag */ |
53a98ed7 | 28 | #define __SANITIZE_ADDRESS__ |
2bd926b4 AK |
29 | #define __no_sanitize_address \ |
30 | __attribute__((no_sanitize("address", "hwaddress"))) | |
31 | #else | |
32 | #define __no_sanitize_address | |
53a98ed7 | 33 | #endif |
87358710 | 34 | |
dfd402a4 ME |
35 | #if __has_feature(thread_sanitizer) |
36 | /* emulate gcc's __SANITIZE_THREAD__ flag */ | |
37 | #define __SANITIZE_THREAD__ | |
38 | #define __no_sanitize_thread \ | |
39 | __attribute__((no_sanitize("thread"))) | |
40 | #else | |
41 | #define __no_sanitize_thread | |
42 | #endif | |
43 | ||
97e49102 AB |
44 | #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) |
45 | #define __HAVE_BUILTIN_BSWAP32__ | |
46 | #define __HAVE_BUILTIN_BSWAP64__ | |
47 | #define __HAVE_BUILTIN_BSWAP16__ | |
48 | #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ | |
49 | ||
5144f8a8 ME |
50 | #if __has_feature(undefined_behavior_sanitizer) |
51 | /* GCC does not have __SANITIZE_UNDEFINED__ */ | |
52 | #define __no_sanitize_undefined \ | |
53 | __attribute__((no_sanitize("undefined"))) | |
54 | #else | |
55 | #define __no_sanitize_undefined | |
56 | #endif | |
57 | ||
9b448bc2 AP |
58 | #if __has_feature(memory_sanitizer) |
59 | #define __SANITIZE_MEMORY__ | |
60 | /* | |
61 | * Unlike other sanitizers, KMSAN still inserts code into functions marked with | |
62 | * no_sanitize("kernel-memory"). Using disable_sanitizer_instrumentation | |
63 | * provides the behavior consistent with other __no_sanitize_ attributes, | |
64 | * guaranteeing that __no_sanitize_memory functions remain uninstrumented. | |
65 | */ | |
66 | #define __no_sanitize_memory __disable_sanitizer_instrumentation | |
67 | ||
68 | /* | |
69 | * The __no_kmsan_checks attribute ensures that a function does not produce | |
70 | * false positive reports by: | |
71 | * - initializing all local variables and memory stores in this function; | |
72 | * - skipping all shadow checks; | |
73 | * - passing initialized arguments to this function's callees. | |
74 | */ | |
75 | #define __no_kmsan_checks __attribute__((no_sanitize("kernel-memory"))) | |
76 | #else | |
77 | #define __no_sanitize_memory | |
78 | #define __no_kmsan_checks | |
79 | #endif | |
80 | ||
540540d0 ME |
81 | /* |
82 | * Support for __has_feature(coverage_sanitizer) was added in Clang 13 together | |
83 | * with no_sanitize("coverage"). Prior versions of Clang support coverage | |
84 | * instrumentation, but cannot be queried for support by the preprocessor. | |
85 | */ | |
86 | #if __has_feature(coverage_sanitizer) | |
87 | #define __no_sanitize_coverage __attribute__((no_sanitize("coverage"))) | |
88 | #else | |
89 | #define __no_sanitize_coverage | |
90 | #endif | |
91 | ||
d08b9f0c ST |
92 | #if __has_feature(shadow_call_stack) |
93 | # define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) | |
94 | #endif | |
cf68fffb | 95 | |
89245600 ST |
96 | #if __has_feature(kcfi) |
97 | /* Disable CFI checking inside a function. */ | |
98 | #define __nocfi __attribute__((__no_sanitize__("kcfi"))) | |
e6f3b3c9 ST |
99 | #endif |
100 | ||
f014a00b NC |
101 | /* |
102 | * Turn individual warnings and errors on and off locally, depending | |
103 | * on version. | |
104 | */ | |
105 | #define __diag_clang(version, severity, s) \ | |
106 | __diag_clang_ ## version(__diag_clang_ ## severity s) | |
107 | ||
108 | /* Severity used in pragma directives */ | |
109 | #define __diag_clang_ignore ignored | |
110 | #define __diag_clang_warn warning | |
111 | #define __diag_clang_error error | |
112 | ||
113 | #define __diag_str1(s) #s | |
114 | #define __diag_str(s) __diag_str1(s) | |
115 | #define __diag(s) _Pragma(__diag_str(clang diagnostic s)) | |
116 | ||
e5efd80a | 117 | #define __diag_clang_13(s) __diag(s) |
4d1ea705 KKD |
118 | |
119 | #define __diag_ignore_all(option, comment) \ | |
e5efd80a | 120 | __diag_clang(13, ignore, option) |