1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
4 */
5
6#ifndef _SPECIAL_H
7#define _SPECIAL_H
8
9#include <stdbool.h>
10#include <objtool/check.h>
11#include <objtool/elf.h>
12
13#define C_JUMP_TABLE_SECTION ".rodata..c_jump_table"
14
15struct special_alt {
16	struct list_head list;
17
18	bool group;
19	bool skip_orig;
20	bool skip_alt;
21	bool jump_or_nop;
22	u8 key_addend;
23
24	struct section *orig_sec;
25	unsigned long orig_off;
26
27	struct section *new_sec;
28	unsigned long new_off;
29
30	unsigned int orig_len, new_len; /* group only */
31};
32
33int special_get_alts(struct elf *elf, struct list_head *alts);
34
35void arch_handle_alternative(unsigned short feature, struct special_alt *alt);
36
37bool arch_support_alt_relocation(struct special_alt *special_alt,
38				 struct instruction *insn,
39				 struct reloc *reloc);
40struct reloc *arch_find_switch_table(struct objtool_file *file,
41				    struct instruction *insn);
42#endif /* _SPECIAL_H */
43