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| 1 | /* Machine-dependent ELF indirect relocation inline functions. |
|---|---|
| 2 | AArch64 version. |
| 3 | Copyright (C) 2012-2024 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)) |
| 33 | elf_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)) |
| 46 | elf_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 |
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