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 /* Some compiler specific definitions are overwritten here 7 * for Clang compiler 8 */ 9 10 #ifdef uninitialized_var 11 #undef uninitialized_var 12 #define uninitialized_var(x) x = *(&(x)) 13 #endif 14 15 /* same as gcc, this was present in clang-2.6 so we can assume it works 16 * with any version that can compile the kernel 17 */ 18 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) 19 20 /* all clang versions usable with the kernel support KASAN ABI version 5 */ 21 #define KASAN_ABI_VERSION 5 22 23 /* emulate gcc's __SANITIZE_ADDRESS__ flag */ 24 #if __has_feature(address_sanitizer) 25 #define __SANITIZE_ADDRESS__ 26 #endif 27 28 #undef __no_sanitize_address 29 #define __no_sanitize_address __attribute__((no_sanitize("address"))) 30 31 /* Clang doesn't have a way to turn it off per-function, yet. */ 32 #ifdef __noretpoline 33 #undef __noretpoline 34 #endif 35 36 /* 37 * Not all versions of clang implement the the type-generic versions 38 * of the builtin overflow checkers. Fortunately, clang implements 39 * __has_builtin allowing us to avoid awkward version 40 * checks. Unfortunately, we don't know which version of gcc clang 41 * pretends to be, so the macro may or may not be defined. 42 */ 43 #undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 44 #if __has_builtin(__builtin_mul_overflow) && \ 45 __has_builtin(__builtin_add_overflow) && \ 46 __has_builtin(__builtin_sub_overflow) 47 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 48 #endif 49