| Mark Charlebois | 565cbdc | 2012-11-20 22:13:10 +0100 | [diff] [blame] | 1 | #ifndef __LINUX_COMPILER_H |
| 2 | #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." |
| 3 | #endif |
| 4 | |
| 5 | /* Some compiler specific definitions are overwritten here |
| 6 | * for Clang compiler |
| 7 | */ |
| 8 | |
| 9 | #ifdef uninitialized_var |
| 10 | #undef uninitialized_var |
| 11 | #define uninitialized_var(x) x = *(&(x)) |
| 12 | #endif |
| Arnd Bergmann | b41c29b | 2016-02-08 15:38:32 +0100 | [diff] [blame] | 13 | |
| 14 | /* same as gcc, this was present in clang-2.6 so we can assume it works |
| 15 | * with any version that can compile the kernel |
| 16 | */ |
| 17 | #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) |
| Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 18 | |
| Andrey Konovalov | 50bed43 | 2018-04-20 14:55:52 -0700 | [diff] [blame] | 19 | #undef __no_sanitize_address |
| 20 | #define __no_sanitize_address __attribute__((no_sanitize("address"))) |
| 21 | |
| David Woodhouse | 6123a6b | 2018-02-19 10:50:57 +0000 | [diff] [blame] | 22 | /* Clang doesn't have a way to turn it off per-function, yet. */ |
| 23 | #ifdef __noretpoline |
| 24 | #undef __noretpoline |
| 25 | #endif |
| Greg Kroah-Hartman | f85543b | 2018-08-15 18:30:15 +0200 | [diff] [blame] | 26 | |
| Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 27 | #ifdef CONFIG_LTO_CLANG |
| 28 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| 29 | #define __norecordmcount \ |
| 30 | __attribute__((__section__(".text..ftrace"))) |
| 31 | #endif |
| Sami Tolvanen | 00a195e | 2017-05-11 15:03:36 -0700 | [diff] [blame] | 32 | |
| 33 | #define __nocfi __attribute__((no_sanitize("cfi"))) |
| Sami Tolvanen | 7bd125e | 2017-06-16 12:52:57 -0700 | [diff] [blame] | 34 | #endif |
| Paul Lawrence | 08da675 | 2018-02-06 15:36:03 -0800 | [diff] [blame] | 35 | |
| 36 | /* all clang versions usable with the kernel support KASAN ABI version 5 */ |
| 37 | #define KASAN_ABI_VERSION 5 |
| 38 | |
| 39 | /* emulate gcc's __SANITIZE_ADDRESS__ flag */ |
| 40 | #if __has_feature(address_sanitizer) |
| 41 | #define __SANITIZE_ADDRESS__ |
| 42 | #endif |
| Greg Kroah-Hartman | 27c2fe3 | 2019-01-31 08:36:51 +0100 | [diff] [blame] | 43 | |
| Rasmus Villemoes | 1777fa9 | 2018-05-08 00:36:27 +0200 | [diff] [blame] | 44 | /* |
| 45 | * Not all versions of clang implement the the type-generic versions |
| 46 | * of the builtin overflow checkers. Fortunately, clang implements |
| 47 | * __has_builtin allowing us to avoid awkward version |
| 48 | * checks. Unfortunately, we don't know which version of gcc clang |
| 49 | * pretends to be, so the macro may or may not be defined. |
| 50 | */ |
| 51 | #undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW |
| 52 | #if __has_builtin(__builtin_mul_overflow) && \ |
| 53 | __has_builtin(__builtin_add_overflow) && \ |
| 54 | __has_builtin(__builtin_sub_overflow) |
| 55 | #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1 |
| 56 | #endif |