1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_COMPILER_TYPES_H 3 #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." 4 #endif 5 6 /* Compiler specific definitions for Clang compiler */ 7 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__) 12 13 /* all clang versions usable with the kernel support KASAN ABI version 5 */ 14 #define KASAN_ABI_VERSION 5 15 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 22 #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) 23 /* Emulate GCC's __SANITIZE_ADDRESS__ flag */ 24 #define __SANITIZE_ADDRESS__ 25 #define __no_sanitize_address \ 26 __attribute__((no_sanitize("address", "hwaddress"))) 27 #else 28 #define __no_sanitize_address 29 #endif 30 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 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 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 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 65 #if __has_feature(shadow_call_stack) 66 # define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) 67 #endif 68 69 #define __nocfi __attribute__((__no_sanitize__("cfi"))) 70 #define __cficanonical __attribute__((__cfi_canonical_jump_table__)) 71 72 /* 73 * Turn individual warnings and errors on and off locally, depending 74 * on version. 75 */ 76 #define __diag_clang(version, severity, s) \ 77 __diag_clang_ ## version(__diag_clang_ ## severity s) 78 79 /* Severity used in pragma directives */ 80 #define __diag_clang_ignore ignored 81 #define __diag_clang_warn warning 82 #define __diag_clang_error error 83 84 #define __diag_str1(s) #s 85 #define __diag_str(s) __diag_str1(s) 86 #define __diag(s) _Pragma(__diag_str(clang diagnostic s)) 87 88 #if CONFIG_CLANG_VERSION >= 110000 89 #define __diag_clang_11(s) __diag(s) 90 #else 91 #define __diag_clang_11(s) 92 #endif 93 94 #define __diag_ignore_all(option, comment) \ 95 __diag_clang(11, ignore, option) 96