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09dcec6470
There are no users left. This also removes the usage of ElfXX_auxv_t, which is not formally standardized. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Acked-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/all/20250226-parse_vdso-nolibc-v2-11-28e14e031ed8@linutronix.de
31 lines
971 B
C
31 lines
971 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef PARSE_VDSO_H
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#define PARSE_VDSO_H
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#include <stdint.h>
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/*
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* To use this vDSO parser, first call one of the vdso_init_* functions.
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* If you've already parsed auxv, then pass the value of AT_SYSINFO_EHDR
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* to vdso_init_from_sysinfo_ehdr. Otherwise pass auxv to vdso_init_from_auxv.
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* Then call vdso_sym for each symbol you want. For example, to look up
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* gettimeofday on x86_64, use:
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*
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* <some pointer> = vdso_sym("LINUX_2.6", "gettimeofday");
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* or
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* <some pointer> = vdso_sym("LINUX_2.6", "__vdso_gettimeofday");
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*
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* vdso_sym will return 0 if the symbol doesn't exist or if the init function
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* failed or was not called. vdso_sym is a little slow, so its return value
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* should be cached.
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*
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* vdso_sym is threadsafe; the init functions are not.
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*
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* These are the prototypes:
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*/
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void *vdso_sym(const char *version, const char *name);
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void vdso_init_from_sysinfo_ehdr(uintptr_t base);
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#endif
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