LXR linux/tools/objtool/include/objtool/special.h

   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
  23        struct section *orig_sec;
  24        unsigned long orig_off;
  25
  26        struct section *new_sec;
  27        unsigned long new_off;
  28
  29        unsigned int orig_len, new_len; /* group only */
  30        u8 key_addend;
  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