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f4152715dc
Provide a convenience macro around __attribute__((aligned)). Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20250419-nolibc-ubsan-v2-2-060b8a016917@weissschuh.net
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* NOLIBC compiler support header
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* Copyright (C) 2023 Thomas Weißschuh <linux@weissschuh.net>
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*/
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#ifndef _NOLIBC_COMPILER_H
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#define _NOLIBC_COMPILER_H
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#if defined(__has_attribute)
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# define __nolibc_has_attribute(attr) __has_attribute(attr)
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#else
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# define __nolibc_has_attribute(attr) 0
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#endif
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#if defined(__has_feature)
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# define __nolibc_has_feature(feature) __has_feature(feature)
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#else
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# define __nolibc_has_feature(feature) 0
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#endif
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#define __nolibc_aligned(alignment) __attribute__((aligned(alignment)))
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#define __nolibc_aligned_as(type) __nolibc_aligned(__alignof__(type))
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#if __nolibc_has_attribute(naked)
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# define __nolibc_entrypoint __attribute__((naked))
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# define __nolibc_entrypoint_epilogue()
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#else
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# define __nolibc_entrypoint __attribute__((optimize("Os", "omit-frame-pointer")))
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# define __nolibc_entrypoint_epilogue() __builtin_unreachable()
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#endif /* __nolibc_has_attribute(naked) */
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#if defined(__SSP__) || defined(__SSP_STRONG__) || defined(__SSP_ALL__) || defined(__SSP_EXPLICIT__)
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#define _NOLIBC_STACKPROTECTOR
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#endif /* defined(__SSP__) ... */
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#if __nolibc_has_attribute(no_stack_protector)
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# define __no_stack_protector __attribute__((no_stack_protector))
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#else
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# define __no_stack_protector __attribute__((__optimize__("-fno-stack-protector")))
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#endif /* __nolibc_has_attribute(no_stack_protector) */
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#if __nolibc_has_attribute(fallthrough)
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# define __nolibc_fallthrough do { } while (0); __attribute__((fallthrough))
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#else
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# define __nolibc_fallthrough do { } while (0)
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#endif /* __nolibc_has_attribute(fallthrough) */
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#endif /* _NOLIBC_COMPILER_H */
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