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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)) |
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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