108 lines
3 KiB
C
108 lines
3 KiB
C
/*
|
|
* 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, rodata;
|
|
};
|
|
|
|
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 symbol *pfunc, *cfunc;
|
|
};
|
|
|
|
struct rela {
|
|
struct list_head list;
|
|
struct hlist_node hash;
|
|
GElf_Rela rela;
|
|
struct section *rela_sec;
|
|
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_by_name(struct elf *elf, const char *name);
|
|
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 */
|