68 static int elf_getphdrnum(Elf *elf, size_t *dst)  in elf_getphdrnum()  argument
73 	ehdr = gelf_getehdr(elf, &gehdr);  in elf_getphdrnum()
84 static int elf_getshdrstrndx(Elf *elf __maybe_unused, size_t *dst __maybe_unused)  in elf_getshdrstrndx()
181 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)  in elf_addr_to_index()  argument
187 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in elf_addr_to_index()
200 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,  in elf_section_by_name()  argument
206 	/* ELF is corrupted/truncated, avoid calling elf_strptr. */  in elf_section_by_name()
207 	if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL))  in elf_section_by_name()
210 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in elf_section_by_name()
214 		str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);  in elf_section_by_name()
229 	Elf *elf;  in filename__has_section()  local
238 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in filename__has_section()
239 	if (elf == NULL)  in filename__has_section()
242 	if (gelf_getehdr(elf, &ehdr) == NULL)  in filename__has_section()
245 	found = !!elf_section_by_name(elf, &ehdr, &shdr, sec, NULL);  in filename__has_section()
248 	elf_end(elf);  in filename__has_section()
254 static int elf_read_program_header(Elf *elf, u64 vaddr, GElf_Phdr *phdr)  in elf_read_program_header()  argument
259 	if (elf_getphdrnum(elf, &phdrnum))  in elf_read_program_header()
263 		if (gelf_getphdr(elf, i, phdr) == NULL)  in elf_read_program_header()
403 static bool get_ifunc_name(Elf *elf, struct dso *dso, GElf_Ehdr *ehdr,  in get_ifunc_name()  argument
413 	if (elf_read_program_header(elf, addr, &phdr))  in get_ifunc_name()
539 static void get_rela_dyn_info(Elf *elf, GElf_Ehdr *ehdr, struct rela_dyn_info *di, Elf_Scn *scn)  in get_rela_dyn_info()  argument
546 	scn = elf_section_by_name(elf, ehdr, &rela_dyn_shdr, ".rela.dyn", NULL);  in get_rela_dyn_info()
553 	scn = elf_getscn(elf, rela_dyn_shdr.sh_link);  in get_rela_dyn_info()
558 	di->dynstr_data = elf_getdata(elf_getscn(elf, shdr.sh_link), NULL);  in get_rela_dyn_info()
633 static int dso__synthesize_plt_got_symbols(struct dso *dso, Elf *elf,  in dso__synthesize_plt_got_symbols()  argument
644 	scn = elf_section_by_name(elf, ehdr, &shdr, ".plt.got", NULL);  in dso__synthesize_plt_got_symbols()
649 		get_rela_dyn_info(elf, ehdr, &di, scn);  in dso__synthesize_plt_got_symbols()
684 	Elf *elf;  in dso__synthesize_plt_symbols()  local
689 	elf = ss->elf;  in dso__synthesize_plt_symbols()
692 	if (!elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL))  in dso__synthesize_plt_symbols()
715 	    dso__synthesize_plt_got_symbols(dso, elf, &ehdr, sympltname, sizeof(sympltname)))  in dso__synthesize_plt_symbols()
720 	    elf_section_by_name(elf, &ehdr, &plt_sec_shdr, ".plt.sec", NULL)) {  in dso__synthesize_plt_symbols()
733 	scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,  in dso__synthesize_plt_symbols()
736 		scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,  in dso__synthesize_plt_symbols()
778 	scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);  in dso__synthesize_plt_symbols()
823 		else if (!get_ifunc_name(elf, dso, &ehdr, &ri, sympltname, sizeof(sympltname)))  in dso__synthesize_plt_symbols()
857 static int elf_read_build_id(Elf *elf, void *bf, size_t size)  in elf_read_build_id()  argument
870 	ek = elf_kind(elf);  in elf_read_build_id()
874 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in elf_read_build_id()
875 		pr_err("%s: cannot get elf header.\n", __func__);  in elf_read_build_id()
886 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
891 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
896 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
971 	Elf *elf;  in read_build_id()  local
980 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in read_build_id()
981 	if (elf == NULL) {  in read_build_id()
982 		pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);  in read_build_id()
986 	err = elf_read_build_id(elf, bid->data, size);  in read_build_id()
990 	elf_end(elf);  in read_build_id()
1124 	Elf *elf;  in filename__read_debuglink()  local
1135 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in filename__read_debuglink()
1136 	if (elf == NULL) {  in filename__read_debuglink()
1137 		pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);  in filename__read_debuglink()
1141 	ek = elf_kind(elf);  in filename__read_debuglink()
1145 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in filename__read_debuglink()
1146 		pr_err("%s: cannot get elf header.\n", __func__);  in filename__read_debuglink()
1150 	sec = elf_section_by_name(elf, &ehdr, &shdr,  in filename__read_debuglink()
1165 	elf_end(elf);  in filename__read_debuglink()
1214 	elf_end(ss->elf);  in symsrc__destroy()
1221 	 * Usually vmlinux is an ELF file with type ET_EXEC for most  in elf__needs_adjust_symbols()
1233 	Elf *elf;  in symsrc__init()  local
1250 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in symsrc__init()
1251 	if (elf == NULL) {  in symsrc__init()
1252 		pr_debug("%s: cannot read %s ELF file.\n", __func__, name);  in symsrc__init()
1257 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in symsrc__init()
1259 		pr_debug("%s: cannot get elf header.\n", __func__);  in symsrc__init()
1274 		size = elf_read_build_id(elf, build_id, BUILD_ID_SIZE);  in symsrc__init()
1288 	ss->is_64_bit = (gelf_getclass(elf) == ELFCLASS64);  in symsrc__init()
1291 	ss->symtab = elf_section_by_name(elf, &ehdr, &ss->symshdr, ".symtab",  in symsrc__init()
1297 	ss->dynsym = elf_section_by_name(elf, &ehdr, &ss->dynshdr, ".dynsym",  in symsrc__init()
1303 	ss->opdsec = elf_section_by_name(elf, &ehdr, &ss->opdshdr, ".opd",  in symsrc__init()
1319 	ss->elf    = elf;  in symsrc__init()
1327 	elf_end(elf);  in symsrc__init()
1344 static u64 max_text_section(Elf *elf, GElf_Ehdr *ehdr)  in max_text_section()  argument
1355 	/* ELF is corrupted/truncated, avoid calling elf_strptr. */  in max_text_section()
1356 	if (!elf_rawdata(elf_getscn(elf, ehdr->e_shstrndx), NULL))  in max_text_section()
1359 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in max_text_section()
1369 		sec_name = elf_strptr(elf, ehdr->e_shstrndx, shdr.sh_name);  in max_text_section()
1556 	Elf *elf;  in dso__load_sym_internal()  local
1564 	elf = syms_ss->elf;  in dso__load_sym_internal()
1574 	if (elf_section_by_name(runtime_ss->elf, &runtime_ss->ehdr, &tshdr,  in dso__load_sym_internal()
1587 	sec = elf_getscn(elf, shdr.sh_link);  in dso__load_sym_internal()
1595 	sec_strndx = elf_getscn(runtime_ss->elf, runtime_ss->ehdr.e_shstrndx);  in dso__load_sym_internal()
1603 	sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);  in dso__load_sym_internal()
1649 		max_text_sh_offset = max_text_section(runtime_ss->elf, &runtime_ss->ehdr);  in dso__load_sym_internal()
1663 		/* Reject ARM ELF "mapping symbols": these aren't unique and  in dso__load_sym_internal()
1676 			sym.st_shndx = elf_addr_to_index(runtime_ss->elf,  in dso__load_sym_internal()
1693 		sec = elf_getscn(syms_ss->elf, sym.st_shndx);  in dso__load_sym_internal()
1719 			sec = elf_getscn(runtime_ss->elf, sym.st_shndx);  in dso__load_sym_internal()
1752 			if (elf_read_program_header(runtime_ss->elf,  in dso__load_sym_internal()
1765 				 * is not necessary for normal C ELF file, we  in dso__load_sym_internal()
1861 static int elf_read_maps(Elf *elf, bool exe, mapfn_t mapfn, void *data)  in elf_read_maps()  argument
1868 	if (elf_getphdrnum(elf, &phdrnum))  in elf_read_maps()
1872 		if (gelf_getphdr(elf, i, &phdr) == NULL)  in elf_read_maps()
1897 	Elf *elf;  in file__read_maps()  local
1899 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in file__read_maps()
1900 	if (elf == NULL)  in file__read_maps()
1904 		*is_64_bit = (gelf_getclass(elf) == ELFCLASS64);  in file__read_maps()
1906 	err = elf_read_maps(elf, exe, mapfn, data);  in file__read_maps()
1908 	elf_end(elf);  in file__read_maps()
1917 	Elf *elf;  in dso__type_fd()  local
1919 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in dso__type_fd()
1920 	if (elf == NULL)  in dso__type_fd()
1923 	ek = elf_kind(elf);  in dso__type_fd()
1927 	if (gelf_getclass(elf) == ELFCLASS64) {  in dso__type_fd()
1932 	if (gelf_getehdr(elf, &ehdr) == NULL)  in dso__type_fd()
1940 	elf_end(elf);  in dso__type_fd()
1989 	Elf *elf;  member
2001 	kcore->elf = elf_begin(kcore->fd, ELF_C_READ, NULL);  in kcore__open()
2002 	if (!kcore->elf)  in kcore__open()
2005 	kcore->elfclass = gelf_getclass(kcore->elf);  in kcore__open()
2009 	ehdr = gelf_getehdr(kcore->elf, &kcore->ehdr);  in kcore__open()
2016 	elf_end(kcore->elf);  in kcore__open()
2034 	kcore->elf = elf_begin(kcore->fd, ELF_C_WRITE, NULL);  in kcore__init()
2035 	if (!kcore->elf)  in kcore__init()
2038 	if (!gelf_newehdr(kcore->elf, elfclass))  in kcore__init()
2046 	elf_end(kcore->elf);  in kcore__init()
2055 	elf_end(kcore->elf);  in kcore__close()
2086 	if (!gelf_update_ehdr(to->elf, ehdr))  in kcore__copy_hdr()
2089 	if (!gelf_newphdr(to->elf, count))  in kcore__copy_hdr()
2109 	if (!gelf_update_phdr(kcore->elf, idx, &phdr))  in kcore__add_phdr()
2117 	return elf_update(kcore->elf, ELF_C_WRITE);  in kcore__write()
2329 static int kcore_copy__read_maps(struct kcore_copy_info *kci, Elf *elf)  in kcore_copy__read_maps()  argument
2331 	if (elf_read_maps(elf, true, kcore_copy__read_map, kci) < 0)  in kcore_copy__read_maps()
2396 				 Elf *elf)  in kcore_copy__calc_maps()  argument
2434 	if (kcore_copy__read_maps(kci, elf))  in kcore_copy__calc_maps()
2584 	if (kcore_copy__calc_maps(&kci, from_dir, kcore.elf))  in kcore_copy()
2593 	offset = gelf_fsize(extract.elf, ELF_T_EHDR, 1, EV_CURRENT) +  in kcore_copy()
2594 		 gelf_fsize(extract.elf, ELF_T_PHDR, kci.phnum, EV_CURRENT);  in kcore_copy()
2717  * @elf: elf of the opened file
2723  * Responsible for parsing the @data in section .note.stapsdt in @elf and
2726 static int populate_sdt_note(Elf **elf, const char *data, size_t len,  in populate_sdt_note()  argument
2742 		.d_size = gelf_fsize((*elf), ELF_T_ADDR, NR_ADDR, EV_CURRENT),  in populate_sdt_note()
2763 	if (gelf_xlatetom(*elf, &dst, &src,  in populate_sdt_note()
2764 			  elf_getident(*elf, NULL)[EI_DATA]) == NULL) {  in populate_sdt_note()
2806 	if (gelf_getclass(*elf) == ELFCLASS32) {  in populate_sdt_note()
2814 	if (!gelf_getehdr(*elf, &ehdr)) {  in populate_sdt_note()
2815 		pr_debug("%s : cannot get elf header.\n", __func__);  in populate_sdt_note()
2827 	if (elf_section_by_name(*elf, &ehdr, &shdr, SDT_BASE_SCN, NULL))  in populate_sdt_note()
2831 	if (elf_section_by_name(*elf, &ehdr, &shdr, SDT_PROBES_SCN, NULL))  in populate_sdt_note()
2851  * @elf : elf to look into
2854  * Scans the sections in 'elf' for the section
2858 static int construct_sdt_notes_list(Elf *elf, struct list_head *sdt_notes)  in construct_sdt_notes_list()  argument
2869 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in construct_sdt_notes_list()
2873 	if (elf_getshdrstrndx(elf, &shstrndx) != 0) {  in construct_sdt_notes_list()
2879 	scn = elf_section_by_name(elf, &ehdr, &shdr, SDT_NOTE_SCN, NULL);  in construct_sdt_notes_list()
2902 			ret = populate_sdt_note(&elf, ((data->d_buf) + desc_off),  in construct_sdt_notes_list()
2921  * the ELF and then calls construct_sdt_notes_list.
2925 	Elf *elf;  in get_sdt_note_list()  local
2932 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in get_sdt_note_list()
2933 	if (!elf) {  in get_sdt_note_list()
2937 	ret = construct_sdt_notes_list(elf, head);  in get_sdt_note_list()
2938 	elf_end(elf);  in get_sdt_note_list()