tools/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 "check.h"
  11 #include "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
  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 };
  31
  32 int special_get_alts(struct elf *elf, struct list_head *alts);
  33
  34 void arch_handle_alternative(unsigned short feature, struct special_alt *alt);
  35
  36 bool arch_support_alt_relocation(struct special_alt *special_alt,
  37                                  struct instruction *insn,
  38                                  struct reloc *reloc);
  39 struct reloc *arch_find_switch_table(struct objtool_file *file,
  40                                     struct instruction *insn);
  41 #endif /* _SPECIAL_H */