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/* ELF symbol resolve functions for VDSO objects.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _DL_VDSO_H
#define _DL_VDSO_H 1
#include <ldsodefs.h>
#include <dl-hash.h>
/* Functions for resolving symbols in the VDSO link map. */
extern void *_dl_vdso_vsym (const char *name,
const struct r_found_version *version)
attribute_hidden;
/* If the architecture support vDSO it should define which is the expected
kernel version and hash value through both VDSO_NAME and VDSO_HASH
(usually defined at architecture sysdep.h). */
#ifndef VDSO_NAME
# define VDSO_NAME "LINUX_0.0"
#endif
#ifndef VDSO_HASH
# define VDSO_HASH 0
#endif
static inline void *
get_vdso_symbol (const char *symbol)
{
struct r_found_version rfv = { VDSO_NAME, VDSO_HASH, 1, NULL };
return _dl_vdso_vsym (symbol, &rfv);
}
static inline void *
get_vdso_mangle_symbol (const char *symbol)
{
void *vdsop = get_vdso_symbol (symbol);
PTR_MANGLE (vdsop);
return vdsop;
}
#endif /* dl-vdso.h */
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