1 /* Machine-dependent ELF indirect relocation inline functions. 2 x86-64 version. 3 Copyright (C) 2009-2022 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 26 #define ELF_MACHINE_IRELA 1 27 28 static inline ElfW(Addr) 29 __attribute ((always_inline)) elf_ifunc_invoke(ElfW (Addr)addr)30elf_ifunc_invoke (ElfW(Addr) addr) 31 { 32 return ((ElfW(Addr) (*) (void)) (addr)) (); 33 } 34 35 static inline void 36 __attribute ((always_inline)) elf_irela(const ElfW (Rela)* reloc)37elf_irela (const ElfW(Rela) *reloc) 38 { 39 ElfW(Addr) *const reloc_addr = (void *) reloc->r_offset; 40 const unsigned long int r_type = ELFW(R_TYPE) (reloc->r_info); 41 42 if (__glibc_likely (r_type == R_X86_64_IRELATIVE)) 43 { 44 ElfW(Addr) value = elf_ifunc_invoke(reloc->r_addend); 45 *reloc_addr = value; 46 } 47 else 48 __libc_fatal ("Unexpected reloc type in static binary.\n"); 49 } 50 51 #endif /* dl-irel.h */ 52