| /* 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 |
| <http://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 |
