1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * elf.c - ELF access library
6  * Copyright (C) 2013-2015 Josh Poimboeuf <jpoimboe@redhat.com>
31 #define __elf_table(name)	(elf->name##_hash)
32 #define __elf_bits(name)	(elf->name##_bits)
45 				 MAP_PRIVATE|MAP_ANON, -1, 0); \
46 	if (__elf_table(name) == (void *)-1L) { \
58 	if (sa->offset < sb->offset)  in symbol_to_offset()
60 	if (sa->offset > sb->offset)  in symbol_to_offset()
63 	if (sa->len < sb->len)  in symbol_to_offset()
65 	if (sa->len > sb->len)  in symbol_to_offset()
68 	sa->alias = sb;  in symbol_to_offset()
78 	if (*o < s->offset)  in symbol_by_offset()
79 		return -1;  in symbol_by_offset()
80 	if (*o >= s->offset + s->len)  in symbol_by_offset()
86 struct section *find_section_by_name(const struct elf *elf, const char *name)  in find_section_by_name()
88 	struct section *sec;  in find_section_by_name()
91 		if (!strcmp(sec->name, name))  in find_section_by_name()
98 static struct section *find_section_by_index(struct elf *elf,  in find_section_by_index()
101 	struct section *sec;  in find_section_by_index()
103 	elf_hash_for_each_possible(section, sec, hash, idx) {  in find_section_by_index()
104 		if (sec->idx == idx)  in find_section_by_index()
116 		if (sym->idx == idx)  in find_symbol_by_index()
123 struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset)  in find_symbol_by_offset()
127 	rb_for_each(node, &offset, &sec->symbol_tree, symbol_by_offset) {  in find_symbol_by_offset()
130 		if (s->offset == offset && s->type != STT_SECTION)  in find_symbol_by_offset()
137 struct symbol *find_func_by_offset(struct section *sec, unsigned long offset)  in find_func_by_offset()
141 	rb_for_each(node, &offset, &sec->symbol_tree, symbol_by_offset) {  in find_func_by_offset()
144 		if (s->offset == offset && s->type == STT_FUNC)  in find_func_by_offset()
151 struct symbol *find_symbol_containing(const struct section *sec, unsigned long offset)  in find_symbol_containing()
155 	rb_for_each(node, &offset, &sec->symbol_tree, symbol_by_offset) {  in find_symbol_containing()
158 		if (s->type != STT_SECTION)  in find_symbol_containing()
165 struct symbol *find_func_containing(struct section *sec, unsigned long offset)  in find_func_containing()
169 	rb_for_each(node, &offset, &sec->symbol_tree, symbol_by_offset) {  in find_func_containing()
172 		if (s->type == STT_FUNC)  in find_func_containing()
184 		if (!strcmp(sym->name, name))  in find_symbol_by_name()
191 struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *sec,  in find_reloc_by_dest_range()
197 	if (!sec->reloc)  in find_reloc_by_dest_range()
200 	sec = sec->reloc;  in find_reloc_by_dest_range()
205 			if (reloc->sec != sec)  in find_reloc_by_dest_range()
208 			if (reloc->offset >= offset && reloc->offset < offset + len) {  in find_reloc_by_dest_range()
209 				if (!r || reloc->offset < r->offset)  in find_reloc_by_dest_range()
220 struct reloc *find_reloc_by_dest(const struct elf *elf, struct section *sec, unsigned long offset)  in find_reloc_by_dest()
228 	struct section *sec;  in read_sections()
232 	if (elf_getshdrnum(elf->elf, &sections_nr)) {  in read_sections()
234 		return -1;  in read_sections()
237 	if (elf_getshdrstrndx(elf->elf, &shstrndx)) {  in read_sections()
239 		return -1;  in read_sections()
242 	if (!elf_alloc_hash(section, sections_nr) ||  in read_sections()
244 		return -1;  in read_sections()
250 			return -1;  in read_sections()
254 		INIT_LIST_HEAD(&sec->symbol_list);  in read_sections()
255 		INIT_LIST_HEAD(&sec->reloc_list);  in read_sections()
257 		s = elf_getscn(elf->elf, i);  in read_sections()
260 			return -1;  in read_sections()
263 		sec->idx = elf_ndxscn(s);  in read_sections()
265 		if (!gelf_getshdr(s, &sec->sh)) {  in read_sections()
267 			return -1;  in read_sections()
270 		sec->name = elf_strptr(elf->elf, shstrndx, sec->sh.sh_name);  in read_sections()
271 		if (!sec->name) {  in read_sections()
273 			return -1;  in read_sections()
276 		if (sec->sh.sh_size != 0) {  in read_sections()
277 			sec->data = elf_getdata(s, NULL);  in read_sections()
278 			if (!sec->data) {  in read_sections()
280 				return -1;  in read_sections()
282 			if (sec->data->d_off != 0 ||  in read_sections()
283 			    sec->data->d_size != sec->sh.sh_size) {  in read_sections()
285 				     sec->name);  in read_sections()
286 				return -1;  in read_sections()
290 		if (sec->sh.sh_flags & SHF_EXECINSTR)  in read_sections()
291 			elf->text_size += sec->sh.sh_size;  in read_sections()
293 		list_add_tail(&sec->list, &elf->sections);  in read_sections()
294 		elf_hash_add(section, &sec->hash, sec->idx);  in read_sections()
295 		elf_hash_add(section_name, &sec->name_hash, str_hash(sec->name));  in read_sections()
300 		printf("section_bits: %d\n", elf->section_bits);  in read_sections()
304 	if (elf_nextscn(elf->elf, s)) {  in read_sections()
305 		WARN("section entry mismatch");  in read_sections()
306 		return -1;  in read_sections()
317 	sym->type = GELF_ST_TYPE(sym->sym.st_info);  in elf_add_symbol()
318 	sym->bind = GELF_ST_BIND(sym->sym.st_info);  in elf_add_symbol()
320 	sym->offset = sym->sym.st_value;  in elf_add_symbol()
321 	sym->len = sym->sym.st_size;  in elf_add_symbol()
323 	rb_add(&sym->node, &sym->sec->symbol_tree, symbol_to_offset);  in elf_add_symbol()
324 	pnode = rb_prev(&sym->node);  in elf_add_symbol()
326 		entry = &rb_entry(pnode, struct symbol, node)->list;  in elf_add_symbol()
328 		entry = &sym->sec->symbol_list;  in elf_add_symbol()
329 	list_add(&sym->list, entry);  in elf_add_symbol()
330 	elf_hash_add(symbol, &sym->hash, sym->idx);  in elf_add_symbol()
331 	elf_hash_add(symbol_name, &sym->name_hash, str_hash(sym->name));  in elf_add_symbol()
337 	if (!sym->len)  in elf_add_symbol()
338 		rb_erase(&sym->node, &sym->sec->symbol_tree);  in elf_add_symbol()
343 	struct section *symtab, *symtab_shndx, *sec;  in read_symbols()
354 			shndx_data = symtab_shndx->data;  in read_symbols()
356 		symbols_nr = symtab->sh.sh_size / symtab->sh.sh_entsize;  in read_symbols()
369 		return -1;  in read_symbols()
375 			return -1;  in read_symbols()
378 		sym->alias = sym;  in read_symbols()
380 		sym->idx = i;  in read_symbols()
382 		if (!gelf_getsymshndx(symtab->data, shndx_data, i, &sym->sym,  in read_symbols()
388 		sym->name = elf_strptr(elf->elf, symtab->sh.sh_link,  in read_symbols()
389 				       sym->sym.st_name);  in read_symbols()
390 		if (!sym->name) {  in read_symbols()
395 		if ((sym->sym.st_shndx > SHN_UNDEF &&  in read_symbols()
396 		     sym->sym.st_shndx < SHN_LORESERVE) ||  in read_symbols()
397 		    (shndx_data && sym->sym.st_shndx == SHN_XINDEX)) {  in read_symbols()
398 			if (sym->sym.st_shndx != SHN_XINDEX)  in read_symbols()
399 				shndx = sym->sym.st_shndx;  in read_symbols()
401 			sym->sec = find_section_by_index(elf, shndx);  in read_symbols()
402 			if (!sym->sec) {  in read_symbols()
403 				WARN("couldn't find section for symbol %s",  in read_symbols()
404 				     sym->name);  in read_symbols()
407 			if (GELF_ST_TYPE(sym->sym.st_info) == STT_SECTION) {  in read_symbols()
408 				sym->name = sym->sec->name;  in read_symbols()
409 				sym->sec->sym = sym;  in read_symbols()
412 			sym->sec = find_section_by_index(elf, 0);  in read_symbols()
419 		printf("symbol_bits: %d\n", elf->symbol_bits);  in read_symbols()
423 	list_for_each_entry(sec, &elf->sections, list) {  in read_symbols()
424 		list_for_each_entry(sym, &sec->symbol_list, list) {  in read_symbols()
427 			if (sym->type != STT_FUNC)  in read_symbols()
430 			if (sym->pfunc == NULL)  in read_symbols()
431 				sym->pfunc = sym;  in read_symbols()
433 			if (sym->cfunc == NULL)  in read_symbols()
434 				sym->cfunc = sym;  in read_symbols()
436 			coldstr = strstr(sym->name, ".cold");  in read_symbols()
440 			pnamelen = coldstr - sym->name;  in read_symbols()
443 				     sym->name, MAX_NAME_LEN);  in read_symbols()
444 				return -1;  in read_symbols()
447 			strncpy(pname, sym->name, pnamelen);  in read_symbols()
453 				     sym->name);  in read_symbols()
454 				return -1;  in read_symbols()
457 			sym->pfunc = pfunc;  in read_symbols()
458 			pfunc->cfunc = sym;  in read_symbols()
461 			 * Unfortunately, -fnoreorder-functions puts the child  in read_symbols()
465 			 * Note that pfunc->len now no longer matches  in read_symbols()
466 			 * pfunc->sym.st_size.  in read_symbols()
468 			if (sym->sec == pfunc->sec &&  in read_symbols()
469 			    sym->offset >= pfunc->offset &&  in read_symbols()
470 			    sym->offset + sym->len == pfunc->offset + pfunc->len) {  in read_symbols()
471 				pfunc->len -= sym->len;  in read_symbols()
480 	return -1;  in read_symbols()
483 static struct section *elf_create_reloc_section(struct elf *elf,
484 						struct section *base,
487 int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,  in elf_add_reloc()
492 	if (!sec->reloc && !elf_create_reloc_section(elf, sec, SHT_RELA))  in elf_add_reloc()
493 		return -1;  in elf_add_reloc()
498 		return -1;  in elf_add_reloc()
502 	reloc->sec = sec->reloc;  in elf_add_reloc()
503 	reloc->offset = offset;  in elf_add_reloc()
504 	reloc->type = type;  in elf_add_reloc()
505 	reloc->sym = sym;  in elf_add_reloc()
506 	reloc->addend = addend;  in elf_add_reloc()
508 	list_add_tail(&reloc->list, &sec->reloc->reloc_list);  in elf_add_reloc()
509 	elf_hash_add(reloc, &reloc->hash, reloc_hash(reloc));  in elf_add_reloc()
511 	sec->reloc->sh.sh_size += sec->reloc->sh.sh_entsize;  in elf_add_reloc()
512 	sec->reloc->changed = true;  in elf_add_reloc()
517 int elf_add_reloc_to_insn(struct elf *elf, struct section *sec,  in elf_add_reloc_to_insn()
519 			  struct section *insn_sec, unsigned long insn_off)  in elf_add_reloc_to_insn()
524 	if (insn_sec->sym) {  in elf_add_reloc_to_insn()
525 		sym = insn_sec->sym;  in elf_add_reloc_to_insn()
530 		 * The Clang assembler strips section symbols, so we have to  in elf_add_reloc_to_insn()
539 			sym = find_symbol_containing(insn_sec, insn_off - 1);  in elf_add_reloc_to_insn()
543 			WARN("can't find symbol containing %s+0x%lx", insn_sec->name, insn_off);  in elf_add_reloc_to_insn()
544 			return -1;  in elf_add_reloc_to_insn()
547 		addend = insn_off - sym->offset;  in elf_add_reloc_to_insn()
553 static int read_rel_reloc(struct section *sec, int i, struct reloc *reloc, unsigned int *symndx)  in read_rel_reloc()
555 	if (!gelf_getrel(sec->data, i, &reloc->rel)) {  in read_rel_reloc()
557 		return -1;  in read_rel_reloc()
559 	reloc->type = GELF_R_TYPE(reloc->rel.r_info);  in read_rel_reloc()
560 	reloc->addend = 0;  in read_rel_reloc()
561 	reloc->offset = reloc->rel.r_offset;  in read_rel_reloc()
562 	*symndx = GELF_R_SYM(reloc->rel.r_info);  in read_rel_reloc()
566 static int read_rela_reloc(struct section *sec, int i, struct reloc *reloc, unsigned int *symndx)  in read_rela_reloc()
568 	if (!gelf_getrela(sec->data, i, &reloc->rela)) {  in read_rela_reloc()
570 		return -1;  in read_rela_reloc()
572 	reloc->type = GELF_R_TYPE(reloc->rela.r_info);  in read_rela_reloc()
573 	reloc->addend = reloc->rela.r_addend;  in read_rela_reloc()
574 	reloc->offset = reloc->rela.r_offset;  in read_rela_reloc()
575 	*symndx = GELF_R_SYM(reloc->rela.r_info);  in read_rela_reloc()
581 	struct section *sec;  in read_relocs()
587 	if (!elf_alloc_hash(reloc, elf->text_size / 16))  in read_relocs()
588 		return -1;  in read_relocs()
590 	list_for_each_entry(sec, &elf->sections, list) {  in read_relocs()
591 		if ((sec->sh.sh_type != SHT_RELA) &&  in read_relocs()
592 		    (sec->sh.sh_type != SHT_REL))  in read_relocs()
595 		sec->base = find_section_by_index(elf, sec->sh.sh_info);  in read_relocs()
596 		if (!sec->base) {  in read_relocs()
597 			WARN("can't find base section for reloc section %s",  in read_relocs()
598 			     sec->name);  in read_relocs()
599 			return -1;  in read_relocs()
602 		sec->base->reloc = sec;  in read_relocs()
605 		for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) {  in read_relocs()
609 				return -1;  in read_relocs()
612 			switch (sec->sh.sh_type) {  in read_relocs()
615 					return -1;  in read_relocs()
619 					return -1;  in read_relocs()
621 			default: return -1;  in read_relocs()
624 			reloc->sec = sec;  in read_relocs()
625 			reloc->idx = i;  in read_relocs()
626 			reloc->sym = find_symbol_by_index(elf, symndx);  in read_relocs()
627 			if (!reloc->sym) {  in read_relocs()
629 				     symndx, sec->name);  in read_relocs()
630 				return -1;  in read_relocs()
633 			list_add_tail(&reloc->list, &sec->reloc_list);  in read_relocs()
634 			elf_hash_add(reloc, &reloc->hash, reloc_hash(reloc));  in read_relocs()
645 		printf("reloc_bits: %d\n", elf->reloc_bits);  in read_relocs()
665 	INIT_LIST_HEAD(&elf->sections);  in elf_open_read()
667 	elf->fd = open(name, flags);  in elf_open_read()
668 	if (elf->fd == -1) {  in elf_open_read()
681 	elf->elf = elf_begin(elf->fd, cmd, NULL);  in elf_open_read()
682 	if (!elf->elf) {  in elf_open_read()
687 	if (!gelf_getehdr(elf->elf, &elf->ehdr)) {  in elf_open_read()
708 static int elf_add_string(struct elf *elf, struct section *strtab, char *str)  in elf_add_string()
717 		WARN("can't find .strtab section");  in elf_add_string()
718 		return -1;  in elf_add_string()
721 	s = elf_getscn(elf->elf, strtab->idx);  in elf_add_string()
724 		return -1;  in elf_add_string()
730 		return -1;  in elf_add_string()
733 	data->d_buf = str;  in elf_add_string()
734 	data->d_size = strlen(str) + 1;  in elf_add_string()
735 	data->d_align = 1;  in elf_add_string()
737 	len = strtab->sh.sh_size;  in elf_add_string()
738 	strtab->sh.sh_size += data->d_size;  in elf_add_string()
739 	strtab->changed = true;  in elf_add_string()
746 	struct section *symtab, *symtab_shndx;  in elf_create_undef_symbol()
758 	sym->name = strdup(name);  in elf_create_undef_symbol()
760 	sym->sym.st_name = elf_add_string(elf, NULL, sym->name);  in elf_create_undef_symbol()
761 	if (sym->sym.st_name == -1)  in elf_create_undef_symbol()
764 	sym->sym.st_info = GELF_ST_INFO(STB_GLOBAL, STT_NOTYPE);  in elf_create_undef_symbol()
776 	s = elf_getscn(elf->elf, symtab->idx);  in elf_create_undef_symbol()
788 	data->d_buf = &sym->sym;  in elf_create_undef_symbol()
789 	data->d_size = sizeof(sym->sym);  in elf_create_undef_symbol()
790 	data->d_align = 1;  in elf_create_undef_symbol()
791 	data->d_type = ELF_T_SYM;  in elf_create_undef_symbol()
793 	sym->idx = symtab->sh.sh_size / sizeof(sym->sym);  in elf_create_undef_symbol()
795 	symtab->sh.sh_size += data->d_size;  in elf_create_undef_symbol()
796 	symtab->changed = true;  in elf_create_undef_symbol()
800 		s = elf_getscn(elf->elf, symtab_shndx->idx);  in elf_create_undef_symbol()
812 		data->d_buf = &sym->sym.st_size; /* conveniently 0 */  in elf_create_undef_symbol()
813 		data->d_size = sizeof(Elf32_Word);  in elf_create_undef_symbol()
814 		data->d_align = 4;  in elf_create_undef_symbol()
815 		data->d_type = ELF_T_WORD;  in elf_create_undef_symbol()
817 		symtab_shndx->sh.sh_size += 4;  in elf_create_undef_symbol()
818 		symtab_shndx->changed = true;  in elf_create_undef_symbol()
821 	sym->sec = find_section_by_index(elf, 0);  in elf_create_undef_symbol()
828 struct section *elf_create_section(struct elf *elf, const char *name,  in elf_create_section()
831 	struct section *sec, *shstrtab;  in elf_create_section()
842 	INIT_LIST_HEAD(&sec->symbol_list);  in elf_create_section()
843 	INIT_LIST_HEAD(&sec->reloc_list);  in elf_create_section()
845 	s = elf_newscn(elf->elf);  in elf_create_section()
851 	sec->name = strdup(name);  in elf_create_section()
852 	if (!sec->name) {  in elf_create_section()
857 	sec->idx = elf_ndxscn(s);  in elf_create_section()
858 	sec->changed = true;  in elf_create_section()
860 	sec->data = elf_newdata(s);  in elf_create_section()
861 	if (!sec->data) {  in elf_create_section()
866 	sec->data->d_size = size;  in elf_create_section()
867 	sec->data->d_align = 1;  in elf_create_section()
870 		sec->data->d_buf = malloc(size);  in elf_create_section()
871 		if (!sec->data->d_buf) {  in elf_create_section()
875 		memset(sec->data->d_buf, 0, size);  in elf_create_section()
878 	if (!gelf_getshdr(s, &sec->sh)) {  in elf_create_section()
883 	sec->sh.sh_size = size;  in elf_create_section()
884 	sec->sh.sh_entsize = entsize;  in elf_create_section()
885 	sec->sh.sh_type = SHT_PROGBITS;  in elf_create_section()
886 	sec->sh.sh_addralign = 1;  in elf_create_section()
887 	sec->sh.sh_flags = SHF_ALLOC | sh_flags;  in elf_create_section()
889 	/* Add section name to .shstrtab (or .strtab for Clang) */  in elf_create_section()
894 		WARN("can't find .shstrtab or .strtab section");  in elf_create_section()
897 	sec->sh.sh_name = elf_add_string(elf, shstrtab, sec->name);  in elf_create_section()
898 	if (sec->sh.sh_name == -1)  in elf_create_section()
901 	list_add_tail(&sec->list, &elf->sections);  in elf_create_section()
902 	elf_hash_add(section, &sec->hash, sec->idx);  in elf_create_section()
903 	elf_hash_add(section_name, &sec->name_hash, str_hash(sec->name));  in elf_create_section()
905 	elf->changed = true;  in elf_create_section()
910 static struct section *elf_create_rel_reloc_section(struct elf *elf, struct section *base)  in elf_create_rel_reloc_section()
913 	struct section *sec;  in elf_create_rel_reloc_section()
915 	relocname = malloc(strlen(base->name) + strlen(".rel") + 1);  in elf_create_rel_reloc_section()
921 	strcat(relocname, base->name);  in elf_create_rel_reloc_section()
928 	base->reloc = sec;  in elf_create_rel_reloc_section()
929 	sec->base = base;  in elf_create_rel_reloc_section()
931 	sec->sh.sh_type = SHT_REL;  in elf_create_rel_reloc_section()
932 	sec->sh.sh_addralign = 8;  in elf_create_rel_reloc_section()
933 	sec->sh.sh_link = find_section_by_name(elf, ".symtab")->idx;  in elf_create_rel_reloc_section()
934 	sec->sh.sh_info = base->idx;  in elf_create_rel_reloc_section()
935 	sec->sh.sh_flags = SHF_INFO_LINK;  in elf_create_rel_reloc_section()
940 static struct section *elf_create_rela_reloc_section(struct elf *elf, struct section *base)  in elf_create_rela_reloc_section()
943 	struct section *sec;  in elf_create_rela_reloc_section()
945 	relocname = malloc(strlen(base->name) + strlen(".rela") + 1);  in elf_create_rela_reloc_section()
951 	strcat(relocname, base->name);  in elf_create_rela_reloc_section()
958 	base->reloc = sec;  in elf_create_rela_reloc_section()
959 	sec->base = base;  in elf_create_rela_reloc_section()
961 	sec->sh.sh_type = SHT_RELA;  in elf_create_rela_reloc_section()
962 	sec->sh.sh_addralign = 8;  in elf_create_rela_reloc_section()
963 	sec->sh.sh_link = find_section_by_name(elf, ".symtab")->idx;  in elf_create_rela_reloc_section()
964 	sec->sh.sh_info = base->idx;  in elf_create_rela_reloc_section()
965 	sec->sh.sh_flags = SHF_INFO_LINK;  in elf_create_rela_reloc_section()
970 static struct section *elf_create_reloc_section(struct elf *elf,  in elf_create_reloc_section()
971 					 struct section *base,  in elf_create_reloc_section()
981 static int elf_rebuild_rel_reloc_section(struct section *sec)  in elf_rebuild_rel_reloc_section()
988 	buf = malloc(sec->sh.sh_size);  in elf_rebuild_rel_reloc_section()
991 		return -1;  in elf_rebuild_rel_reloc_section()
994 	sec->data->d_buf = buf;  in elf_rebuild_rel_reloc_section()
995 	sec->data->d_size = sec->sh.sh_size;  in elf_rebuild_rel_reloc_section()
996 	sec->data->d_type = ELF_T_REL;  in elf_rebuild_rel_reloc_section()
999 	list_for_each_entry(reloc, &sec->reloc_list, list) {  in elf_rebuild_rel_reloc_section()
1000 		reloc->rel.r_offset = reloc->offset;  in elf_rebuild_rel_reloc_section()
1001 		reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);  in elf_rebuild_rel_reloc_section()
1002 		if (!gelf_update_rel(sec->data, idx, &reloc->rel)) {  in elf_rebuild_rel_reloc_section()
1004 			return -1;  in elf_rebuild_rel_reloc_section()
1012 static int elf_rebuild_rela_reloc_section(struct section *sec)  in elf_rebuild_rela_reloc_section()
1019 	buf = malloc(sec->sh.sh_size);  in elf_rebuild_rela_reloc_section()
1022 		return -1;  in elf_rebuild_rela_reloc_section()
1025 	sec->data->d_buf = buf;  in elf_rebuild_rela_reloc_section()
1026 	sec->data->d_size = sec->sh.sh_size;  in elf_rebuild_rela_reloc_section()
1027 	sec->data->d_type = ELF_T_RELA;  in elf_rebuild_rela_reloc_section()
1030 	list_for_each_entry(reloc, &sec->reloc_list, list) {  in elf_rebuild_rela_reloc_section()
1031 		reloc->rela.r_offset = reloc->offset;  in elf_rebuild_rela_reloc_section()
1032 		reloc->rela.r_addend = reloc->addend;  in elf_rebuild_rela_reloc_section()
1033 		reloc->rela.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);  in elf_rebuild_rela_reloc_section()
1034 		if (!gelf_update_rela(sec->data, idx, &reloc->rela)) {  in elf_rebuild_rela_reloc_section()
1036 			return -1;  in elf_rebuild_rela_reloc_section()
1044 static int elf_rebuild_reloc_section(struct elf *elf, struct section *sec)  in elf_rebuild_reloc_section()
1046 	switch (sec->sh.sh_type) {  in elf_rebuild_reloc_section()
1049 	default:       return -1;  in elf_rebuild_reloc_section()
1053 int elf_write_insn(struct elf *elf, struct section *sec,  in elf_write_insn()
1057 	Elf_Data *data = sec->data;  in elf_write_insn()
1059 	if (data->d_type != ELF_T_BYTE || data->d_off) {  in elf_write_insn()
1060 		WARN("write to unexpected data for section: %s", sec->name);  in elf_write_insn()
1061 		return -1;  in elf_write_insn()
1064 	memcpy(data->d_buf + offset, insn, len);  in elf_write_insn()
1067 	elf->changed = true;  in elf_write_insn()
1074 	struct section *sec = reloc->sec;  in elf_write_reloc()
1076 	if (sec->sh.sh_type == SHT_REL) {  in elf_write_reloc()
1077 		reloc->rel.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);  in elf_write_reloc()
1078 		reloc->rel.r_offset = reloc->offset;  in elf_write_reloc()
1080 		if (!gelf_update_rel(sec->data, reloc->idx, &reloc->rel)) {  in elf_write_reloc()
1082 			return -1;  in elf_write_reloc()
1085 		reloc->rela.r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);  in elf_write_reloc()
1086 		reloc->rela.r_addend = reloc->addend;  in elf_write_reloc()
1087 		reloc->rela.r_offset = reloc->offset;  in elf_write_reloc()
1089 		if (!gelf_update_rela(sec->data, reloc->idx, &reloc->rela)) {  in elf_write_reloc()
1091 			return -1;  in elf_write_reloc()
1095 	elf->changed = true;  in elf_write_reloc()
1102 	struct section *sec;  in elf_write()
1105 	/* Update changed relocation sections and section headers: */  in elf_write()
1106 	list_for_each_entry(sec, &elf->sections, list) {  in elf_write()
1107 		if (sec->changed) {  in elf_write()
1108 			s = elf_getscn(elf->elf, sec->idx);  in elf_write()
1111 				return -1;  in elf_write()
1113 			if (!gelf_update_shdr(s, &sec->sh)) {  in elf_write()
1115 				return -1;  in elf_write()
1118 			if (sec->base &&  in elf_write()
1121 				return -1;  in elf_write()
1124 			sec->changed = false;  in elf_write()
1125 			elf->changed = true;  in elf_write()
1129 	/* Make sure the new section header entries get updated properly. */  in elf_write()
1130 	elf_flagelf(elf->elf, ELF_C_SET, ELF_F_DIRTY);  in elf_write()
1133 	if (elf_update(elf->elf, ELF_C_WRITE) < 0) {  in elf_write()
1135 		return -1;  in elf_write()
1138 	elf->changed = false;  in elf_write()
1145 	struct section *sec, *tmpsec;  in elf_close()
1149 	if (elf->elf)  in elf_close()
1150 		elf_end(elf->elf);  in elf_close()
1152 	if (elf->fd > 0)  in elf_close()
1153 		close(elf->fd);  in elf_close()
1155 	list_for_each_entry_safe(sec, tmpsec, &elf->sections, list) {  in elf_close()
1156 		list_for_each_entry_safe(sym, tmpsym, &sec->symbol_list, list) {  in elf_close()
1157 			list_del(&sym->list);  in elf_close()
1158 			hash_del(&sym->hash);  in elf_close()
1161 		list_for_each_entry_safe(reloc, tmpreloc, &sec->reloc_list, list) {  in elf_close()
1162 			list_del(&reloc->list);  in elf_close()
1163 			hash_del(&reloc->hash);  in elf_close()
1166 		list_del(&sec->list);  in elf_close()