tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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