projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| b41c29b0 AB |
8 | /* same as gcc, this was present in clang-2.6 so we can assume it works |
| 9 | * with any version that can compile the kernel | |
| 10 | */ | |
| 11 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) | |
| 4ca59b14 | 12 | |
| 53a98ed7 PL |
13 | /* all clang versions usable with the kernel support KASAN ABI version 5 */ |
| 14 | #define KASAN_ABI_VERSION 5 | |
| 15 | ||
| 540540d0 ME |
16 | /* |
| 17 | * Note: Checking __has_feature(*_sanitizer) is only true if the feature is | |
| 18 | * enabled. Therefore it is not required to additionally check defined(CONFIG_*) | |
| 19 | * to avoid adding redundant attributes in other configurations. | |
| 20 | */ | |
| 21 | ||
| 2bd926b4 | 22 | #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) |
| 5cbaefe9 | 23 | /* Emulate GCC's __SANITIZE_ADDRESS__ flag */ |
| 53a98ed7 | 24 | #define __SANITIZE_ADDRESS__ |
| 2bd926b4 AK |
25 | #define __no_sanitize_address \ |
| 26 | __attribute__((no_sanitize("address", "hwaddress"))) | |
| 27 | #else | |
| 28 | #define __no_sanitize_address | |
| 53a98ed7 | 29 | #endif |
| 87358710 | 30 | |
| dfd402a4 ME |
31 | #if __has_feature(thread_sanitizer) |
| 32 | /* emulate gcc's __SANITIZE_THREAD__ flag */ | |
| 33 | #define __SANITIZE_THREAD__ | |
| 34 | #define __no_sanitize_thread \ | |
| 35 | __attribute__((no_sanitize("thread"))) | |
| 36 | #else | |
| 37 | #define __no_sanitize_thread | |
| 38 | #endif | |
| 39 | ||
| 97e49102 AB |
40 | #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) |
| 41 | #define __HAVE_BUILTIN_BSWAP32__ | |
| 42 | #define __HAVE_BUILTIN_BSWAP64__ | |
| 43 | #define __HAVE_BUILTIN_BSWAP16__ | |
| 44 | #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ | |
| 45 | ||
| 5144f8a8 ME |
46 | #if __has_feature(undefined_behavior_sanitizer) |
| 47 | /* GCC does not have __SANITIZE_UNDEFINED__ */ | |
| 48 | #define __no_sanitize_undefined \ | |
| 49 | __attribute__((no_sanitize("undefined"))) | |
| 50 | #else | |
| 51 | #define __no_sanitize_undefined | |
| 52 | #endif | |
| 53 | ||
| 540540d0 ME |
54 | /* |
| 55 | * Support for __has_feature(coverage_sanitizer) was added in Clang 13 together | |
| 56 | * with no_sanitize("coverage"). Prior versions of Clang support coverage | |
| 57 | * instrumentation, but cannot be queried for support by the preprocessor. | |
| 58 | */ | |
| 59 | #if __has_feature(coverage_sanitizer) | |
| 60 | #define __no_sanitize_coverage __attribute__((no_sanitize("coverage"))) | |
| 61 | #else | |
| 62 | #define __no_sanitize_coverage | |
| 63 | #endif | |
| 64 | ||
| f0907827 | 65 | /* |
| c5f748e2 | 66 | * Not all versions of clang implement the type-generic versions |
| f0907827 RV |
67 | * of the builtin overflow checkers. Fortunately, clang implements |
| 68 | * __has_builtin allowing us to avoid awkward version | |
| 69 | * checks. Unfortunately, we don't know which version of gcc clang | |
| 70 | * pretends to be, so the macro may or may not be defined. | |
| 71 | */ | |
| f0907827 RV |
72 | #if __has_builtin(__builtin_mul_overflow) && \ |
| 73 | __has_builtin(__builtin_add_overflow) && \ | |
| 74 | __has_builtin(__builtin_sub_overflow) | |
| 75 | #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 | |
| 76 | #endif | |
| 815f0ddb | 77 | |
| d08b9f0c ST |
78 | #if __has_feature(shadow_call_stack) |
| 79 | # define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) | |
| 80 | #endif | |
| cf68fffb ST |
81 | |
| 82 | #define __nocfi __attribute__((__no_sanitize__("cfi"))) | |
| ff301ceb | 83 | #define __cficanonical __attribute__((__cfi_canonical_jump_table__)) |