1 /* Machine-dependent ELF indirect relocation inline functions. 2 AArch64 version. 3 Copyright (C) 2012-2022 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 #ifndef _DL_IREL_H 21 #define _DL_IREL_H 22 23 #include <stdio.h> 24 #include <unistd.h> 25 #include <ldsodefs.h> 26 #include <sysdep.h> 27 #include <sys/ifunc.h> 28 29 #define ELF_MACHINE_IRELA 1 30 31 static inline ElfW(Addr) 32 __attribute ((always_inline)) elf_ifunc_invoke(ElfW (Addr)addr)33elf_ifunc_invoke (ElfW(Addr) addr) 34 { 35 __ifunc_arg_t arg; 36 37 arg._size = sizeof (arg); 38 arg._hwcap = GLRO(dl_hwcap); 39 arg._hwcap2 = GLRO(dl_hwcap2); 40 return ((ElfW(Addr) (*) (uint64_t, const __ifunc_arg_t *)) (addr)) 41 (GLRO(dl_hwcap) | _IFUNC_ARG_HWCAP, &arg); 42 } 43 44 static inline void 45 __attribute ((always_inline)) elf_irela(const ElfW (Rela)* reloc)46elf_irela (const ElfW(Rela) *reloc) 47 { 48 ElfW(Addr) *const reloc_addr = (void *) reloc->r_offset; 49 const unsigned long int r_type = ELFW(R_TYPE) (reloc->r_info); 50 51 if (__glibc_likely (r_type == AARCH64_R(IRELATIVE))) 52 { 53 ElfW(Addr) value = elf_ifunc_invoke (reloc->r_addend); 54 *reloc_addr = value; 55 } 56 else 57 __libc_fatal ("Unexpected reloc type in static binary.\n"); 58 } 59 60 #endif 61