cregit-Linux how code gets into the kernel

Release 4.14 tools/objtool/elf.h

Directory: tools/objtool
/*
 * Copyright (C) 2015 Josh Poimboeuf <jpoimboe@redhat.com>
 *
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * 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 <http://www.gnu.org/licenses/>.
 */

#ifndef _OBJTOOL_ELF_H

#define _OBJTOOL_ELF_H

#include <stdio.h>
#include <gelf.h>
#include <linux/list.h>
#include <linux/hashtable.h>

#ifdef LIBELF_USE_DEPRECATED

# define elf_getshdrnum    elf_getshnum

# define elf_getshdrstrndx elf_getshstrndx
#endif

/*
 * Fallback for systems without this "read, mmaping if possible" cmd.
 */
#ifndef ELF_C_READ_MMAP

#define ELF_C_READ_MMAP ELF_C_READ
#endif


struct section {
	
struct list_head list;
	
GElf_Shdr sh;
	
struct list_head symbol_list;
	DECLARE_HASHTABLE(symbol_hash, 8);
	
struct list_head rela_list;
	DECLARE_HASHTABLE(rela_hash, 16);
	

struct section *base, *rela;
	
struct symbol *sym;
	
Elf_Data *data;
	
char *name;
	
int idx;
	
unsigned int len;
	

bool changed, text;
};


struct symbol {
	
struct list_head list;
	
struct hlist_node hash;
	
GElf_Sym sym;
	
struct section *sec;
	
char *name;
	
unsigned int idx;
	

unsigned char bind, type;
	
unsigned long offset;
	
unsigned int len;
};


struct rela {
	
struct list_head list;
	
struct hlist_node hash;
	
GElf_Rela rela;
	
struct symbol *sym;
	
unsigned int type;
	
unsigned long offset;
	
int addend;
};


struct elf {
	
Elf *elf;
	
GElf_Ehdr ehdr;
	
int fd;
	
char *name;
	
struct list_head sections;
	DECLARE_HASHTABLE(rela_hash, 16);
};


struct elf *elf_open(const char *name, int flags);
struct section *find_section_by_name(struct elf *elf, const char *name);
struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
struct symbol *find_symbol_containing(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest(struct section *sec, unsigned long offset);
struct rela *find_rela_by_dest_range(struct section *sec, unsigned long offset,
				     unsigned int len);
struct symbol *find_containing_func(struct section *sec, unsigned long offset);
struct section *elf_create_section(struct elf *elf, const char *name, size_t
				   entsize, int nr);
struct section *elf_create_rela_section(struct elf *elf, struct section *base);
int elf_rebuild_rela_section(struct section *sec);
int elf_write(struct elf *elf);
void elf_close(struct elf *elf);


#define for_each_sec(file, sec)						\
	list_for_each_entry(sec, &file->elf->sections, list)

#endif /* _OBJTOOL_ELF_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Josh Poimboeuf38896.76%685.71%
Jan Beulich133.24%114.29%
Total401100.00%7100.00%
Directory: tools/objtool
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.