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/* Definitions used by AArch64 indirect function resolvers.
Copyright (C) 2019 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 _SYS_IFUNC_H
#define _SYS_IFUNC_H
/* A second argument is passed to the ifunc resolver. */
#define _IFUNC_ARG_HWCAP (1ULL << 62)
/* The prototype of a gnu indirect function resolver on AArch64 is
ElfW(Addr) ifunc_resolver (uint64_t, const __ifunc_arg_t *);
the first argument should have the _IFUNC_ARG_HWCAP bit set and
the remaining bits should match the AT_HWCAP settings. */
/* Second argument to an ifunc resolver. */
struct __ifunc_arg_t
{
unsigned long _size; /* Size of the struct, so it can grow. */
unsigned long _hwcap;
unsigned long _hwcap2;
};
typedef struct __ifunc_arg_t __ifunc_arg_t;
#endif
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