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1 | /* Machine-dependent ELF indirect relocation inline functions. |
---|---|
2 | i386 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_IREL 1 |
27 | |
28 | static inline Elf32_Addr |
29 | __attribute ((always_inline)) |
30 | elf_ifunc_invoke (Elf32_Addr addr) |
31 | { |
32 | return ((Elf32_Addr (*) (void)) (addr)) (); |
33 | } |
34 | |
35 | static inline void |
36 | __attribute ((always_inline)) |
37 | elf_irel (const Elf32_Rel *reloc) |
38 | { |
39 | Elf32_Addr *const reloc_addr = (void *) reloc->r_offset; |
40 | const unsigned long int r_type = ELF32_R_TYPE (reloc->r_info); |
41 | |
42 | if (__glibc_likely (r_type == R_386_IRELATIVE)) |
43 | { |
44 | Elf32_Addr value = elf_ifunc_invoke(*reloc_addr); |
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 |
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