cregit-Linux how code gets into the kernel

Release 4.14 tools/objtool/check.h

Directory: tools/objtool
 * Copyright (C) 2017 Josh Poimboeuf <>
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <>.

#ifndef _CHECK_H

#define _CHECK_H

#include <stdbool.h>
#include "elf.h"
#include "cfi.h"
#include "arch.h"
#include "orc.h"
#include <linux/hashtable.h>

struct insn_state {
struct cfi_reg cfa;
struct cfi_reg regs[CFI_NUM_REGS];
int stack_size;
unsigned char type;
bool bp_scratch;
bool drap;

int drap_reg, drap_offset;
struct cfi_reg vals[CFI_NUM_REGS];

struct instruction {
struct list_head list;
struct hlist_node hash;
struct section *sec;
unsigned long offset;
unsigned int len;
unsigned char type;
unsigned long immediate;

bool alt_group, visited, dead_end, ignore, hint, save, restore;
struct symbol *call_dest;
struct instruction *jump_dest;
struct list_head alts;
struct symbol *func;
struct stack_op stack_op;
struct insn_state state;
struct orc_entry orc;

struct objtool_file {
struct elf *elf;
struct list_head insn_list;
	DECLARE_HASHTABLE(insn_hash, 16);

struct section *rodata, *whitelist;

bool ignore_unreachables, c_file, hints;

int check(const char *objname, bool no_fp, bool no_unreachable, bool orc);

struct instruction *find_insn(struct objtool_file *file,
			      struct section *sec, unsigned long offset);

#define for_each_insn(file, insn)					\
	list_for_each_entry(insn, &file->insn_list, list)

#define sec_for_each_insn(file, sec, insn)				\
	for (insn = find_insn(file, sec, 0);                            \
             insn && &insn->list != &file->insn_list &&                 \
                        insn->sec == sec;                               \
             insn = list_next_entry(insn, list))

#endif /* _CHECK_H */

Overall Contributors

Josh Poimboeuf245100.00%7100.00%
Directory: tools/objtool
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