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#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) 17/* Emulate GCC's __SANITIZE_ADDRESS__ flag */ 18#define __SANITIZE_ADDRESS__ 19#define __no_sanitize_address \ 20 __attribute__((no_sanitize("address", "hwaddress"))) 21#else 22#define __no_sanitize_address 23#endif 24 25#if __has_feature(thread_sanitizer) 26/* emulate gcc's __SANITIZE_THREAD__ flag */ 27#define __SANITIZE_THREAD__ 28#define __no_sanitize_thread \ 29 __attribute__((no_sanitize("thread"))) 30#else 31#define __no_sanitize_thread 32#endif 33 34#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) 35#define __HAVE_BUILTIN_BSWAP32__ 36#define __HAVE_BUILTIN_BSWAP64__ 37#define __HAVE_BUILTIN_BSWAP16__ 38#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ 39 40#if __has_feature(undefined_behavior_sanitizer) 41/* GCC does not have __SANITIZE_UNDEFINED__ */ 42#define __no_sanitize_undefined \ 43 __attribute__((no_sanitize("undefined"))) 44#else 45#define __no_sanitize_undefined 46#endif 47 48/* 49 * Not all versions of clang implement the type-generic versions 50 * of the builtin overflow checkers. Fortunately, clang implements 51 * __has_builtin allowing us to avoid awkward version 52 * checks. Unfortunately, we don't know which version of gcc clang 53 * pretends to be, so the macro may or may not be defined. 54 */ 55#if __has_builtin(__builtin_mul_overflow) && \ 56 __has_builtin(__builtin_add_overflow) && \ 57 __has_builtin(__builtin_sub_overflow) 58#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 59#endif 60 61#if __has_feature(shadow_call_stack) 62# define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) 63#endif 64