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The specific attributes for the _start entrypoint are duplicated for each architecture. Deduplicate it into a dedicated #define into compiler.h. For clang compatibility, the epilogue will also need to be adapted, so move that one, too. Acked-by: Willy Tarreau <w@1wt.eu> Link: https://lore.kernel.org/r/20240807-nolibc-llvm-v2-5-c20f2f5fc7c2@weissschuh.net Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
31 lines
960 B
C
31 lines
960 B
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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#define __nolibc_entrypoint __attribute__((optimize("Os", "omit-frame-pointer")))
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#define __nolibc_entrypoint_epilogue() __builtin_unreachable()
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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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#endif /* _NOLIBC_COMPILER_H */
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