/* * 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 */