33 #define __elf_table(name)	(elf->name##_hash)
34 #define __elf_bits(name)	(elf->name##_bits)
133 struct section *find_section_by_name(const struct elf *elf, const char *name)  in find_section_by_name()  argument
145 static struct section *find_section_by_index(struct elf *elf,  in find_section_by_index()  argument
158 static struct symbol *find_symbol_by_index(struct elf *elf, unsigned int idx)  in find_symbol_by_index()  argument
277 struct symbol *find_symbol_by_name(const struct elf *elf, const char *name)  in find_symbol_by_name()  argument
290 static struct symbol *find_local_symbol_by_file_and_name(const struct elf *elf,  in find_local_symbol_by_file_and_name()  argument
306 struct symbol *find_global_symbol_by_name(const struct elf *elf, const char *name)  in find_global_symbol_by_name()  argument
318 struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *sec,  in find_reloc_by_dest_range()  argument
348 struct reloc *find_reloc_by_dest(const struct elf *elf, struct section *sec, unsigned long offset)  in find_reloc_by_dest()  argument
350 	return find_reloc_by_dest_range(elf, sec, offset, 1);  in find_reloc_by_dest()
358 static int read_sections(struct elf *elf)  in read_sections()  argument
365 	if (elf_getshdrnum(elf->elf, &sections_nr)) {  in read_sections()
370 	if (elf_getshdrstrndx(elf->elf, &shstrndx)) {  in read_sections()
379 	elf->section_data = calloc(sections_nr, sizeof(*sec));  in read_sections()
380 	if (!elf->section_data) {  in read_sections()
385 		sec = &elf->section_data[i];  in read_sections()
389 		s = elf_getscn(elf->elf, i);  in read_sections()
402 		sec->name = elf_strptr(elf->elf, shstrndx, sec->sh.sh_name);  in read_sections()
421 		list_add_tail(&sec->list, &elf->sections);  in read_sections()
426 			elf->num_relocs += sec_num_entries(sec);  in read_sections()
431 		printf("section_bits: %d\n", elf->section_bits);  in read_sections()
435 	if (elf_nextscn(elf->elf, s)) {  in read_sections()
474 static int elf_add_symbol(struct elf *elf, struct symbol *sym)  in elf_add_symbol()  argument
487 		elf->num_files++;  in elf_add_symbol()
506 	list_add_tail(&sym->global_list, &elf->symbols);  in elf_add_symbol()
539 static int read_symbols(struct elf *elf)  in read_symbols()  argument
548 	symtab = find_section_by_name(elf, ".symtab");  in read_symbols()
550 		symtab_shndx = find_section_by_name(elf, ".symtab_shndx");  in read_symbols()
569 	elf->symbol_data = calloc(symbols_nr, sizeof(*sym));  in read_symbols()
570 	if (!elf->symbol_data) {  in read_symbols()
575 	INIT_LIST_HEAD(&elf->symbols);  in read_symbols()
578 		sym = &elf->symbol_data[i];  in read_symbols()
588 		sym->name = elf_strptr(elf->elf, symtab->sh.sh_link,  in read_symbols()
601 			sym->sec = find_section_by_index(elf, shndx);  in read_symbols()
611 			sym->sec = find_section_by_index(elf, 0);  in read_symbols()
613 		if (elf_add_symbol(elf, sym))  in read_symbols()
624 		printf("symbol_bits: %d\n", elf->symbol_bits);  in read_symbols()
628 	list_for_each_entry(sec, &elf->sections, list) {  in read_symbols()
649 			pfunc = find_local_symbol_by_file_and_name(elf, sym->file, pname);  in read_symbols()
651 				pfunc = find_global_symbol_by_name(elf, pname);  in read_symbols()
682 static int mark_group_syms(struct elf *elf)  in mark_group_syms()  argument
687 	symtab = find_section_by_name(elf, ".symtab");  in mark_group_syms()
693 	for_each_sec(elf, sec) {  in mark_group_syms()
696 			sym = find_symbol_by_index(elf, sec->sh.sh_info);  in mark_group_syms()
713 static int elf_update_sym_relocs(struct elf *elf, struct symbol *sym)  in elf_update_sym_relocs()  argument
718 		set_reloc_sym(elf, reloc, reloc->sym->idx);  in elf_update_sym_relocs()
731 static int elf_update_symbol(struct elf *elf, struct section *symtab,  in elf_update_symbol()  argument
744 	s = elf_getscn(elf->elf, symtab->idx);  in elf_update_symbol()
751 		t = elf_getscn(elf->elf, symtab_shndx->idx);  in elf_update_symbol()
796 			mark_sec_changed(elf, symtab, true);  in elf_update_symbol()
811 				mark_sec_changed(elf, symtab_shndx, true);  in elf_update_symbol()
860 struct symbol *elf_create_symbol(struct elf *elf, const char *name,  in elf_create_symbol()  argument
882 		sym->sym.st_name = elf_add_string(elf, NULL, sym->name);  in elf_create_symbol()
890 		sym->sec = find_section_by_index(elf, 0);  in elf_create_symbol()
901 	symtab = find_section_by_name(elf, ".symtab");  in elf_create_symbol()
907 	symtab_shndx = find_section_by_name(elf, ".symtab_shndx");  in elf_create_symbol()
919 	old = find_symbol_by_index(elf, first_non_local);  in elf_create_symbol()
926 		if (elf_update_symbol(elf, symtab, symtab_shndx, old)) {  in elf_create_symbol()
931 		if (elf_update_sym_relocs(elf, old))  in elf_create_symbol()
936 			mark_sec_changed(elf, old->group_sec, true);  in elf_create_symbol()
949 	if (sym->idx && elf_update_symbol(elf, symtab, symtab_shndx, sym))  in elf_create_symbol()
953 	mark_sec_changed(elf, symtab, true);  in elf_create_symbol()
957 		mark_sec_changed(elf, symtab_shndx, true);  in elf_create_symbol()
960 	if (elf_add_symbol(elf, sym))  in elf_create_symbol()
966 struct symbol *elf_create_section_symbol(struct elf *elf, struct section *sec)  in elf_create_section_symbol()  argument
970 	sym = elf_create_symbol(elf, sec->name, sec, STB_LOCAL, STT_SECTION, 0, 0);  in elf_create_section_symbol()
979 struct reloc *elf_init_reloc(struct elf *elf, struct section *rsec,  in elf_init_reloc()  argument
1002 	set_reloc_offset(elf, reloc, offset);  in elf_init_reloc()
1003 	set_reloc_sym(elf, reloc, sym->idx);  in elf_init_reloc()
1004 	set_reloc_type(elf, reloc, type);  in elf_init_reloc()
1005 	set_reloc_addend(elf, reloc, addend);  in elf_init_reloc()
1014 struct reloc *elf_init_reloc_text_sym(struct elf *elf, struct section *sec,  in elf_init_reloc_text_sym()  argument
1035 		sym = elf_create_section_symbol(elf, insn_sec);  in elf_init_reloc_text_sym()
1040 	return elf_init_reloc(elf, sec->rsec, reloc_idx, offset, sym, addend,  in elf_init_reloc_text_sym()
1041 			      elf_text_rela_type(elf));  in elf_init_reloc_text_sym()
1044 struct reloc *elf_init_reloc_data_sym(struct elf *elf, struct section *sec,  in elf_init_reloc_data_sym()  argument
1055 	return elf_init_reloc(elf, sec->rsec, reloc_idx, offset, sym, addend,  in elf_init_reloc_data_sym()
1056 			      elf_data_rela_type(elf));  in elf_init_reloc_data_sym()
1059 static int read_relocs(struct elf *elf)  in read_relocs()  argument
1068 	if (!elf_alloc_hash(reloc, elf->num_relocs))  in read_relocs()
1071 	list_for_each_entry(rsec, &elf->sections, list) {  in read_relocs()
1075 		rsec->base = find_section_by_index(elf, rsec->sh.sh_info);  in read_relocs()
1098 			reloc->sym = sym = find_symbol_by_index(elf, symndx);  in read_relocs()
1115 		printf("num_relocs: %lu\n", elf->num_relocs);  in read_relocs()
1116 		printf("reloc_bits: %d\n", elf->reloc_bits);  in read_relocs()
1122 struct elf *elf_open_read(const char *name, int flags)  in elf_open_read()
1124 	struct elf *elf;  in elf_open_read()  local
1129 	elf = malloc(sizeof(*elf));  in elf_open_read()
1130 	if (!elf) {  in elf_open_read()
1134 	memset(elf, 0, sizeof(*elf));  in elf_open_read()
1136 	INIT_LIST_HEAD(&elf->sections);  in elf_open_read()
1138 	elf->fd = open(name, flags);  in elf_open_read()
1139 	if (elf->fd == -1) {  in elf_open_read()
1145 	elf->name = strdup(name);  in elf_open_read()
1146 	if (!elf->name) {  in elf_open_read()
1158 	elf->elf = elf_begin(elf->fd, cmd, NULL);  in elf_open_read()
1159 	if (!elf->elf) {  in elf_open_read()
1164 	if (!gelf_getehdr(elf->elf, &elf->ehdr)) {  in elf_open_read()
1169 	if (read_sections(elf))  in elf_open_read()
1172 	if (read_symbols(elf))  in elf_open_read()
1175 	if (mark_group_syms(elf))  in elf_open_read()
1178 	if (read_relocs(elf))  in elf_open_read()
1181 	return elf;  in elf_open_read()
1184 	elf_close(elf);  in elf_open_read()
1188 struct elf *elf_create_file(GElf_Ehdr *ehdr, const char *name)  in elf_create_file()
1193 	struct elf *elf;  in elf_create_file()  local
1197 	elf = calloc(1, sizeof(*elf));  in elf_create_file()
1198 	if (!elf) {  in elf_create_file()
1203 	INIT_LIST_HEAD(&elf->sections);  in elf_create_file()
1213 	elf->fd = mkstemp(tmp_name);  in elf_create_file()
1214 	if (elf->fd == -1) {  in elf_create_file()
1219 	elf->tmp_name = tmp_name;  in elf_create_file()
1221 	elf->name = strdup(name);  in elf_create_file()
1222 	if (!elf->name) {  in elf_create_file()
1227 	elf->elf = elf_begin(elf->fd, ELF_C_WRITE, NULL);  in elf_create_file()
1228 	if (!elf->elf) {  in elf_create_file()
1233 	if (!gelf_newehdr(elf->elf, ELFCLASS64)) {  in elf_create_file()
1238 	memcpy(&elf->ehdr, ehdr, sizeof(elf->ehdr));  in elf_create_file()
1240 	if (!gelf_update_ehdr(elf->elf, &elf->ehdr)) {  in elf_create_file()
1245 	INIT_LIST_HEAD(&elf->symbols);  in elf_create_file()
1254 	null		= elf_create_section(elf, NULL, 0, 0, SHT_NULL, 0, 0);  in elf_create_file()
1255 	shstrtab	= elf_create_section(elf, NULL, 0, 0, SHT_STRTAB, 1, 0);  in elf_create_file()
1256 	strtab		= elf_create_section(elf, NULL, 0, 0, SHT_STRTAB, 1, 0);  in elf_create_file()
1265 	null->sh.sh_name	= elf_add_string(elf, shstrtab, null->name);  in elf_create_file()
1266 	shstrtab->sh.sh_name	= elf_add_string(elf, shstrtab, shstrtab->name);  in elf_create_file()
1267 	strtab->sh.sh_name	= elf_add_string(elf, shstrtab, strtab->name);  in elf_create_file()
1276 	if (elf_add_string(elf, strtab, "") == -1)  in elf_create_file()
1279 	symtab = elf_create_section(elf, ".symtab", 0x18, 0x18, SHT_SYMTAB, 0x8, 0);  in elf_create_file()
1286 	elf->ehdr.e_shstrndx = shstrtab->idx;  in elf_create_file()
1287 	if (!gelf_update_ehdr(elf->elf, &elf->ehdr)) {  in elf_create_file()
1300 	elf_add_symbol(elf, sym);  in elf_create_file()
1302 	return elf;  in elf_create_file()
1305 unsigned int elf_add_string(struct elf *elf, struct section *strtab, const char *str)  in elf_add_string()  argument
1310 		strtab = find_section_by_name(elf, ".strtab");  in elf_add_string()
1323 	if (!elf_add_data(elf, strtab, str, strlen(str) + 1))  in elf_add_string()
1329 void *elf_add_data(struct elf *elf, struct section *sec, const void *data, size_t size)  in elf_add_data()  argument
1339 	s = elf_getscn(elf->elf, sec->idx);  in elf_add_data()
1366 	mark_sec_changed(elf, sec, true);  in elf_add_data()
1371 struct section *elf_create_section(struct elf *elf, const char *name,  in elf_create_section()  argument
1379 	if (name && find_section_by_name(elf, name)) {  in elf_create_section()
1396 	s = elf_newscn(elf->elf);  in elf_create_section()
1440 		shstrtab = find_section_by_name(elf, ".shstrtab");  in elf_create_section()
1442 			shstrtab = find_section_by_name(elf, ".strtab");  in elf_create_section()
1448 		sec->sh.sh_name = elf_add_string(elf, shstrtab, sec->name);  in elf_create_section()
1456 	list_add_tail(&sec->list, &elf->sections);  in elf_create_section()
1459 	mark_sec_changed(elf, sec, true);  in elf_create_section()
1464 static int elf_alloc_reloc(struct elf *elf, struct section *rsec)  in elf_alloc_reloc()  argument
1473 		rsec->data = elf_newdata(elf_getscn(elf->elf, rsec->idx));  in elf_alloc_reloc()
1484 	rsec->data->d_size = nr_relocs_new * elf_rela_size(elf);  in elf_alloc_reloc()
1498 		rsec->data->d_buf = malloc(nr_alloc * elf_rela_size(elf));  in elf_alloc_reloc()
1504 		       nr_relocs_old * elf_rela_size(elf));  in elf_alloc_reloc()
1507 					    nr_alloc * elf_rela_size(elf));  in elf_alloc_reloc()
1532 	for_each_sym(elf, sym) {  in elf_alloc_reloc()
1572 struct section *elf_create_rela_section(struct elf *elf, struct section *sec,  in elf_create_rela_section()  argument
1586 	rsec = elf_create_section(elf, rsec_name, nr_relocs * elf_rela_size(elf),  in elf_create_rela_section()
1587 				  elf_rela_size(elf), SHT_RELA, elf_addr_size(elf),  in elf_create_rela_section()
1604 	rsec->sh.sh_link = find_section_by_name(elf, ".symtab")->idx;  in elf_create_rela_section()
1613 struct reloc *elf_create_reloc(struct elf *elf, struct section *sec,  in elf_create_reloc()  argument
1621 		rsec = elf_create_rela_section(elf, sec, 0);  in elf_create_reloc()
1626 	if (find_reloc_by_dest(elf, sec, offset)) {  in elf_create_reloc()
1631 	if (elf_alloc_reloc(elf, rsec))  in elf_create_reloc()
1634 	mark_sec_changed(elf, rsec, true);  in elf_create_reloc()
1636 	return elf_init_reloc(elf, rsec, sec_num_entries(rsec) - 1, offset, sym,  in elf_create_reloc()
1640 struct section *elf_create_section_pair(struct elf *elf, const char *name,  in elf_create_section_pair()  argument
1646 	sec = elf_create_section(elf, name, nr * entsize, entsize,  in elf_create_section_pair()
1651 	if (!elf_create_rela_section(elf, sec, nr_relocs))  in elf_create_section_pair()
1657 int elf_write_insn(struct elf *elf, struct section *sec,  in elf_write_insn()  argument
1670 	mark_sec_changed(elf, sec, true);  in elf_write_insn()
1684 static int elf_truncate_section(struct elf *elf, struct section *sec)  in elf_truncate_section()  argument
1691 	s = elf_getscn(elf->elf, sec->idx);  in elf_truncate_section()
1728 int elf_write(struct elf *elf)  in elf_write()  argument
1734 	list_for_each_entry(sec, &elf->sections, list) {  in elf_write()
1735 		if (sec->truncate && elf_truncate_section(elf, sec))  in elf_write()
1739 			s = elf_getscn(elf->elf, sec->idx);  in elf_write()
1751 			mark_sec_changed(elf, sec, false);  in elf_write()
1756 	elf_flagelf(elf->elf, ELF_C_SET, ELF_F_DIRTY);  in elf_write()
1759 	if (elf_update(elf->elf, ELF_C_WRITE) < 0) {  in elf_write()
1764 	elf->changed = false;  in elf_write()
1769 int elf_close(struct elf *elf)  in elf_close()  argument
1771 	if (elf->elf)  in elf_close()
1772 		elf_end(elf->elf);  in elf_close()
1774 	if (elf->fd > 0)  in elf_close()
1775 		close(elf->fd);  in elf_close()
1777 	if (elf->tmp_name && rename(elf->tmp_name, elf->name))  in elf_close()