Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
34 lines
840 B
C
34 lines
840 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2024 Google LLC
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*
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* Example for symbol pointers. When compiled with Clang, gendwarfkyms
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* uses a symbol pointer for `f`.
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*
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* $ clang -g -c examples/symbolptr.c -o examples/symbolptr.o
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* $ echo -e "f\ng\np" | ./gendwarfksyms -d examples/symbolptr.o
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*/
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/* Kernel macros for userspace testing. */
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#ifndef __used
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#define __used __attribute__((__used__))
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#endif
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#ifndef __section
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#define __section(section) __attribute__((__section__(section)))
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#endif
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#define __GENDWARFKSYMS_EXPORT(sym) \
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static typeof(sym) *__gendwarfksyms_ptr_##sym __used \
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__section(".discard.gendwarfksyms") = &sym;
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extern void f(unsigned int arg);
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void g(int *arg);
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void g(int *arg) {}
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struct s;
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extern struct s *p;
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__GENDWARFKSYMS_EXPORT(f);
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__GENDWARFKSYMS_EXPORT(g);
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__GENDWARFKSYMS_EXPORT(p);
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