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43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/* Definitions used by AArch64 indirect function resolvers.
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Copyright (C) 2019-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_IFUNC_H
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#define _SYS_IFUNC_H
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/* A second argument is passed to the ifunc resolver. */
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#define _IFUNC_ARG_HWCAP (1ULL << 62)
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/* The prototype of a gnu indirect function resolver on AArch64 is
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ElfW(Addr) ifunc_resolver (uint64_t, const __ifunc_arg_t *);
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the first argument should have the _IFUNC_ARG_HWCAP bit set and
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the remaining bits should match the AT_HWCAP settings. */
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/* Second argument to an ifunc resolver. */
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struct __ifunc_arg_t
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{
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unsigned long _size; /* Size of the struct, so it can grow. */
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unsigned long _hwcap;
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unsigned long _hwcap2;
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};
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typedef struct __ifunc_arg_t __ifunc_arg_t;
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#endif
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