boot/loader/elf.cpp

53 	static	status_t	Load(int fd, preloaded_image* image);
54 	static	status_t	Relocate(preloaded_image* image);
55 	static	status_t	Resolve(ImageType* image, SymType* symbol,
59 	static	status_t	_LoadSymbolTable(int fd, ImageType* image);
60 	static	status_t	_ParseDynamicSection(ImageType* image);
179 	ImageType* image = (ImageType*)kernel_args_malloc(sizeof(ImageType));
180 	if (image == NULL)
183 	ssize_t length = read_pos(fd, 0, &image->elf_header, sizeof(EhdrType));
185 		kernel_args_free(image);
189 	const EhdrType& elfHeader = image->elf_header;
196 		kernel_args_free(image);
200 	image->elf_class = elfHeader.e_ident[EI_CLASS];
202 	*_image = image;
216 	ImageType* image = static_cast<ImageType*>(_image);
217 	const EhdrType& elfHeader = image->elf_header;
234 	// create an area large enough to hold the image
236 	image->data_region.size = 0;
237 	image->text_region.size = 0;
246 				image->dynamic_section.start = header.p_vaddr;
247 				image->dynamic_section.size = header.p_memsz;
265 			if (image->data_region.size != 0) {
269 			region = &image->data_region;
271 			if (image->text_region.size != 0) {
275 			region = &image->text_region;
291 	if (image->data_region.size == 0 || image->text_region.size == 0) {
300 	if (image->text_region.start < image->data_region.start) {
301 		firstRegion = &image->text_region;
302 		secondRegion = &image->data_region;
304 		firstRegion = &image->data_region;
305 		secondRegion = &image->text_region;
326 	image->data_region.delta += image->data_region.start;
327 	image->text_region.delta += image->text_region.start;
330 		B_PRIx64 "\n", (uint64)image->text_region.start,
331 		(uint64)image->text_region.size,
332 		(int64)(AddrType)image->text_region.delta));
334 		B_PRIx64 "\n", (uint64)image->data_region.start,
335 		(uint64)image->data_region.size,
336 		(int64)(AddrType)image->data_region.delta));
348 			region = &image->data_region;
350 			region = &image->text_region;
376 	image->dynamic_section.start += image->text_region.delta;
377 	image->elf_header.e_entry += image->text_region.delta;
379 	image->num_debug_symbols = 0;
380 	image->debug_symbols = NULL;
381 	image->debug_string_table = NULL;
384 		_LoadSymbolTable(fd, image);
395 	kernel_args_free(image);
405 	ImageType* image = static_cast<ImageType*>(_image);
407 	status_t status = _ParseDynamicSection(image);
412 	if (image->rel) {
414 			(int)image->rel_len / (int)sizeof(RelType)));
416 		status = boot_arch_elf_relocate_rel(image, image->rel, image->rel_len);
421 	if (image->pltrel) {
422 		RelType* pltrel = image->pltrel;
423 		if (image->pltrel_type == DT_REL) {
425 				(int)image->pltrel_len / (int)sizeof(RelType)));
427 			status = boot_arch_elf_relocate_rel(image, pltrel,
428 				image->pltrel_len);
431 				(int)image->pltrel_len / (int)sizeof(RelaType)));
433 			status = boot_arch_elf_relocate_rela(image, (RelaType*)pltrel,
434 				image->pltrel_len);
440 	if (image->rela) {
442 			(int)image->rela_len / (int)sizeof(RelaType)));
443 		status = boot_arch_elf_relocate_rela(image, image->rela,
444 			image->rela_len);
454 ELFLoader<Class>::Resolve(ImageType* image, SymType* symbol,
472 			*symbolAddress = symbol->st_value + image->text_region.delta;
480 ELFLoader<Class>::_LoadSymbolTable(int fd, ImageType* image)
482 	const EhdrType& elfHeader = image->elf_header;
562 	// insert tables into image
563 	image->debug_symbols = symbolTable;
564 	image->num_debug_symbols = numSymbols;
565 	image->debug_string_table = stringTable;
566 	image->debug_string_table_size = size;
584 ELFLoader<Class>::_ParseDynamicSection(ImageType* image)
586 	image->syms = 0;
587 	image->rel = 0;
588 	image->rel_len = 0;
589 	image->rela = 0;
590 	image->rela_len = 0;
591 	image->pltrel = 0;
592 	image->pltrel_len = 0;
593 	image->pltrel_type = 0;
595 	if(image->dynamic_section.start == 0)
598 	DynType* d = (DynType*)Class::Map(image->dynamic_section.start);
606 				image->syms = (SymType*)Class::Map(d[i].d_un.d_ptr
607 					+ image->text_region.delta);
610 				image->rel = (RelType*)Class::Map(d[i].d_un.d_ptr
611 					+ image->text_region.delta);
614 				image->rel_len = d[i].d_un.d_val;
617 				image->rela = (RelaType*)Class::Map(d[i].d_un.d_ptr
618 					+ image->text_region.delta);
621 				image->rela_len = d[i].d_un.d_val;
624 				image->pltrel = (RelType*)Class::Map(d[i].d_un.d_ptr
625 					+ image->text_region.delta);
628 				image->pltrel_len = d[i].d_un.d_val;
631 				image->pltrel_type = d[i].d_un.d_val;
640 	if (image->syms == NULL)
697 	preloaded_image* image;
711 	image = gKernelArgs.preloaded_images;
712 	for (; image != NULL; image = image->next) {
713 		if (image->inode == stat.st_ino) {
722 	status_t status = elf_load_image(fd, &image);
724 		image->name = kernel_args_strdup(path);
725 		image->inode = stat.st_ino;
728 		image->next = gKernelArgs.preloaded_images;
729 		gKernelArgs.preloaded_images = image;
731 		kernel_args_free(image);
739 elf_relocate_image(preloaded_image* image)
742 	if (image->elf_class == ELFCLASS64)
743 		return ELF64Loader::Relocate(image);
746 	if (image->elf_class == ELFCLASS32)
747 		return ELF32Loader::Relocate(image);
755 boot_elf_resolve_symbol(preloaded_elf32_image* image, Elf32_Sym* symbol,
758 	return ELF32Loader::Resolve(image, symbol, symbolAddress);
779 boot_elf_resolve_symbol(preloaded_elf64_image* image, Elf64_Sym* symbol,
782 	return ELF64Loader::Resolve(image, symbol, symbolAddress);