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
  15 struct 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
  33 int special_get_alts(struct elf *elf, struct list_head *alts);
  34
  35 void arch_handle_alternative(unsigned short feature, struct special_alt *alt);
  36
  37 bool arch_support_alt_relocation(struct special_alt *special_alt,
  38                                  struct instruction *insn,
  39                                  struct reloc *reloc);
  40 struct reloc *arch_find_switch_table(struct objtool_file *file,
  41                                     struct instruction *insn);
  42 #endif /* _SPECIAL_H */