forked from mirrors/linux
a7306f3c28
Remove the use of contractions and use proper punctuation in #error directive messages that discourage the direct inclusion of header files. Link: https://lkml.kernel.org/r/20241105032231.28833-1-natanielfarzan@gmail.com Signed-off-by: Nataniel Farzan <natanielfarzan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_COMPILER_TYPES_H
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#error "Please do not include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
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#endif
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/* Compiler specific definitions for Clang compiler */
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/*
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* Clang prior to 17 is being silly and considers many __cleanup() variables
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* as unused (because they are, their sole purpose is to go out of scope).
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*
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* https://github.com/llvm/llvm-project/commit/877210faa447f4cc7db87812f8ed80e398fedd61
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*/
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#undef __cleanup
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#define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func)))
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/* all clang versions usable with the kernel support KASAN ABI version 5 */
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#define KASAN_ABI_VERSION 5
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/*
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* Note: Checking __has_feature(*_sanitizer) is only true if the feature is
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* enabled. Therefore it is not required to additionally check defined(CONFIG_*)
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* to avoid adding redundant attributes in other configurations.
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*/
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#if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
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/* Emulate GCC's __SANITIZE_ADDRESS__ flag */
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#define __SANITIZE_ADDRESS__
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#define __no_sanitize_address \
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__attribute__((no_sanitize("address", "hwaddress")))
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#else
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#define __no_sanitize_address
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#endif
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#if __has_feature(thread_sanitizer)
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/* emulate gcc's __SANITIZE_THREAD__ flag */
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#define __SANITIZE_THREAD__
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#define __no_sanitize_thread \
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__attribute__((no_sanitize("thread")))
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#else
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#define __no_sanitize_thread
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#endif
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#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP)
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#define __HAVE_BUILTIN_BSWAP32__
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#define __HAVE_BUILTIN_BSWAP64__
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#define __HAVE_BUILTIN_BSWAP16__
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#endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */
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#if __has_feature(undefined_behavior_sanitizer)
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/* GCC does not have __SANITIZE_UNDEFINED__ */
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#define __no_sanitize_undefined \
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__attribute__((no_sanitize("undefined")))
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#else
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#define __no_sanitize_undefined
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#endif
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#if __has_feature(memory_sanitizer)
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#define __SANITIZE_MEMORY__
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/*
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* Unlike other sanitizers, KMSAN still inserts code into functions marked with
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* no_sanitize("kernel-memory"). Using disable_sanitizer_instrumentation
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* provides the behavior consistent with other __no_sanitize_ attributes,
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* guaranteeing that __no_sanitize_memory functions remain uninstrumented.
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*/
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#define __no_sanitize_memory __disable_sanitizer_instrumentation
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/*
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* The __no_kmsan_checks attribute ensures that a function does not produce
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* false positive reports by:
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* - initializing all local variables and memory stores in this function;
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* - skipping all shadow checks;
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* - passing initialized arguments to this function's callees.
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*/
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#define __no_kmsan_checks __attribute__((no_sanitize("kernel-memory")))
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#else
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#define __no_sanitize_memory
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#define __no_kmsan_checks
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#endif
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/*
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* Support for __has_feature(coverage_sanitizer) was added in Clang 13 together
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* with no_sanitize("coverage"). Prior versions of Clang support coverage
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* instrumentation, but cannot be queried for support by the preprocessor.
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*/
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#if __has_feature(coverage_sanitizer)
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#define __no_sanitize_coverage __attribute__((no_sanitize("coverage")))
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#else
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#define __no_sanitize_coverage
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#endif
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#if __has_feature(shadow_call_stack)
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# define __noscs __attribute__((__no_sanitize__("shadow-call-stack")))
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#endif
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#if __has_feature(kcfi)
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/* Disable CFI checking inside a function. */
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#define __nocfi __attribute__((__no_sanitize__("kcfi")))
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#endif
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/*
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* Turn individual warnings and errors on and off locally, depending
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* on version.
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*/
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#define __diag_clang(version, severity, s) \
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__diag_clang_ ## version(__diag_clang_ ## severity s)
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/* Severity used in pragma directives */
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#define __diag_clang_ignore ignored
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#define __diag_clang_warn warning
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#define __diag_clang_error error
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#define __diag_str1(s) #s
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#define __diag_str(s) __diag_str1(s)
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#define __diag(s) _Pragma(__diag_str(clang diagnostic s))
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#define __diag_clang_13(s) __diag(s)
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#define __diag_ignore_all(option, comment) \
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__diag_clang(13, ignore, option)
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/*
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* clang has horrible behavior with "g" or "rm" constraints for asm
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* inputs, turning them into something worse than "m". Avoid using
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* constraints with multiple possible uses (but "ir" seems to be ok):
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*
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* https://github.com/llvm/llvm-project/issues/20571
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*/
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#define ASM_INPUT_G "ir"
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#define ASM_INPUT_RM "r"
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