LXR linux/tools/objtool/check.h

   1/*
   2 * Copyright (C) 2017 Josh Poimboeuf <jpoimboe@redhat.com>
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * as published by the Free Software Foundation; either version 2
   7 * of the License, or (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#ifndef _CHECK_H
  19#define _CHECK_H
  20
  21#include <stdbool.h>
  22#include "elf.h"
  23#include "cfi.h"
  24#include "arch.h"
  25#include "orc.h"
  26#include <linux/hashtable.h>
  27
  28struct insn_state {
  29        struct cfi_reg cfa;
  30        struct cfi_reg regs[CFI_NUM_REGS];
  31        int stack_size;
  32        unsigned char type;
  33        bool bp_scratch;
  34        bool drap;
  35        int drap_reg, drap_offset;
  36        struct cfi_reg vals[CFI_NUM_REGS];
  37};
  38
  39struct instruction {
  40        struct list_head list;
  41        struct hlist_node hash;
  42        struct section *sec;
  43        unsigned long offset;
  44        unsigned int len;
  45        unsigned char type;
  46        unsigned long immediate;
  47        bool alt_group, visited, dead_end, ignore, hint, save, restore, ignore_alts;
  48        bool retpoline_safe;
  49        struct symbol *call_dest;
  50        struct instruction *jump_dest;
  51        struct instruction *first_jump_src;
  52        struct list_head alts;
  53        struct symbol *func;
  54        struct stack_op stack_op;
  55        struct insn_state state;
  56        struct orc_entry orc;
  57};
  58
  59struct objtool_file {
  60        struct elf *elf;
  61        struct list_head insn_list;
  62        DECLARE_HASHTABLE(insn_hash, 16);
  63        struct section *rodata, *whitelist;
  64        bool ignore_unreachables, c_file, hints;
  65};
  66
  67int check(const char *objname, bool orc);
  68
  69struct instruction *find_insn(struct objtool_file *file,
  70                              struct section *sec, unsigned long offset);
  71
  72#define for_each_insn(file, insn)                                       \
  73        list_for_each_entry(insn, &file->insn_list, list)
  74
  75#define sec_for_each_insn(file, sec, insn)                              \
  76        for (insn = find_insn(file, sec, 0);                            \
  77             insn && &insn->list != &file->insn_list &&                 \
  78                        insn->sec == sec;                               \
  79             insn = list_next_entry(insn, list))
  80
  81
  82#endif /* _CHECK_H */
  83