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Diffstat (limited to 'sysdeps/aarch64/sys/ifunc.h')
-rw-r--r-- | sysdeps/aarch64/sys/ifunc.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/aarch64/sys/ifunc.h b/sysdeps/aarch64/sys/ifunc.h new file mode 100644 index 0000000000..ef200e9f26 --- /dev/null +++ b/sysdeps/aarch64/sys/ifunc.h @@ -0,0 +1,42 @@ +/* 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 |