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Diffstat (limited to '')
| -rw-r--r-- | tools/objtool/elf.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tools/objtool/elf.h b/tools/objtool/elf.h new file mode 100644 index 000000000..bc97ed86b --- /dev/null +++ b/tools/objtool/elf.h @@ -0,0 +1,107 @@ +/* + * 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 */ |