54 static int elf_getphdrnum(Elf *elf, size_t *dst)  in elf_getphdrnum()  argument
59 	ehdr = gelf_getehdr(elf, &gehdr);  in elf_getphdrnum()
70 static int elf_getshdrstrndx(Elf *elf __maybe_unused, size_t *dst __maybe_unused)  in elf_getshdrstrndx()
167 static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)  in elf_addr_to_index()  argument
173 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in elf_addr_to_index()
186 Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,  in elf_section_by_name()  argument
192 	/* ELF is corrupted/truncated, avoid calling elf_strptr. */  in elf_section_by_name()
193 	if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL))  in elf_section_by_name()
196 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in elf_section_by_name()
200 		str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);  in elf_section_by_name()
215 	Elf *elf;  in filename__has_section()  local
224 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in filename__has_section()
225 	if (elf == NULL)  in filename__has_section()
228 	if (gelf_getehdr(elf, &ehdr) == NULL)  in filename__has_section()
231 	found = !!elf_section_by_name(elf, &ehdr, &shdr, sec, NULL);  in filename__has_section()
234 	elf_end(elf);  in filename__has_section()
240 static int elf_read_program_header(Elf *elf, u64 vaddr, GElf_Phdr *phdr)  in elf_read_program_header()  argument
245 	if (elf_getphdrnum(elf, &phdrnum))  in elf_read_program_header()
249 		if (gelf_getphdr(elf, i, phdr) == NULL)  in elf_read_program_header()
335 static bool get_ifunc_name(Elf *elf, struct dso *dso, GElf_Ehdr *ehdr,  in get_ifunc_name()  argument
345 	if (elf_read_program_header(elf, addr, &phdr))  in get_ifunc_name()
471 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
478 	scn = elf_section_by_name(elf, ehdr, &rela_dyn_shdr, ".rela.dyn", NULL);  in get_rela_dyn_info()
485 	scn = elf_getscn(elf, rela_dyn_shdr.sh_link);  in get_rela_dyn_info()
490 	di->dynstr_data = elf_getdata(elf_getscn(elf, shdr.sh_link), NULL);  in get_rela_dyn_info()
565 static int dso__synthesize_plt_got_symbols(struct dso *dso, Elf *elf,  in dso__synthesize_plt_got_symbols()  argument
576 	scn = elf_section_by_name(elf, ehdr, &shdr, ".plt.got", NULL);  in dso__synthesize_plt_got_symbols()
581 		get_rela_dyn_info(elf, ehdr, &di, scn);  in dso__synthesize_plt_got_symbols()
616 	Elf *elf;  in dso__synthesize_plt_symbols()  local
621 	elf = ss->elf;  in dso__synthesize_plt_symbols()
624 	if (!elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL))  in dso__synthesize_plt_symbols()
647 	    dso__synthesize_plt_got_symbols(dso, elf, &ehdr, sympltname, sizeof(sympltname)))  in dso__synthesize_plt_symbols()
652 	    elf_section_by_name(elf, &ehdr, &plt_sec_shdr, ".plt.sec", NULL)) {  in dso__synthesize_plt_symbols()
665 	scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,  in dso__synthesize_plt_symbols()
668 		scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,  in dso__synthesize_plt_symbols()
710 	scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);  in dso__synthesize_plt_symbols()
755 		else if (!get_ifunc_name(elf, dso, &ehdr, &ri, sympltname, sizeof(sympltname)))  in dso__synthesize_plt_symbols()
784 static int elf_read_build_id(Elf *elf, void *bf, size_t size)  in elf_read_build_id()  argument
797 	ek = elf_kind(elf);  in elf_read_build_id()
801 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in elf_read_build_id()
802 		pr_err("%s: cannot get elf header.\n", __func__);  in elf_read_build_id()
813 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
818 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
823 		sec = elf_section_by_name(elf, &ehdr, &shdr,  in elf_read_build_id()
867 	Elf *elf;  in read_build_id()  local
880 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in read_build_id()
881 	if (elf == NULL) {  in read_build_id()
882 		pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);  in read_build_id()
886 	err = elf_read_build_id(elf, bid->data, size);  in read_build_id()
890 	elf_end(elf);  in read_build_id()
985 	Elf *elf;  in filename__read_debuglink()  local
1000 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in filename__read_debuglink()
1001 	if (elf == NULL) {  in filename__read_debuglink()
1002 		pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);  in filename__read_debuglink()
1006 	ek = elf_kind(elf);  in filename__read_debuglink()
1010 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in filename__read_debuglink()
1011 		pr_err("%s: cannot get elf header.\n", __func__);  in filename__read_debuglink()
1015 	sec = elf_section_by_name(elf, &ehdr, &shdr,  in filename__read_debuglink()
1030 	elf_end(elf);  in filename__read_debuglink()
1050 	elf_end(ss->elf);  in symsrc__destroy()
1057 	 * Usually vmlinux is an ELF file with type ET_EXEC for most  in elf__needs_adjust_symbols()
1065 static Elf *read_gnu_debugdata(struct dso *dso, Elf *elf, const char *name, int *fd_ret)  in read_gnu_debugdata()  argument
1067 	Elf *elf_embedded;  in read_gnu_debugdata()
1074 	char temp_filename[] = "/tmp/perf.gnu_debugdata.elf.XXXXXX";  in read_gnu_debugdata()
1077 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in read_gnu_debugdata()
1078 		pr_debug("%s: cannot read %s ELF file.\n", __func__, name);  in read_gnu_debugdata()
1083 	scn = elf_section_by_name(elf, &ehdr, &shdr, ".gnu_debugdata", &shndx);  in read_gnu_debugdata()
1090 		pr_debug("%s: .gnu_debugdata of ELF file %s has no data.\n", __func__, name);  in read_gnu_debugdata()
1144 	Elf *elf;  in symsrc__init()  local
1161 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in symsrc__init()
1162 	if (elf == NULL) {  in symsrc__init()
1163 		pr_debug("%s: cannot read %s ELF file.\n", __func__, name);  in symsrc__init()
1170 		Elf *embedded = read_gnu_debugdata(dso, elf, name, &new_fd);  in symsrc__init()
1175 		elf_end(elf);  in symsrc__init()
1178 		elf = embedded;  in symsrc__init()
1181 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in symsrc__init()
1183 		pr_debug("%s: cannot get elf header.\n", __func__);  in symsrc__init()
1198 		size = elf_read_build_id(elf, build_id, BUILD_ID_SIZE);  in symsrc__init()
1212 	ss->is_64_bit = (gelf_getclass(elf) == ELFCLASS64);  in symsrc__init()
1215 	ss->symtab = elf_section_by_name(elf, &ehdr, &ss->symshdr, ".symtab",  in symsrc__init()
1221 	ss->dynsym = elf_section_by_name(elf, &ehdr, &ss->dynshdr, ".dynsym",  in symsrc__init()
1227 	ss->opdsec = elf_section_by_name(elf, &ehdr, &ss->opdshdr, ".opd",  in symsrc__init()
1243 	ss->elf    = elf;  in symsrc__init()
1251 	elf_end(elf);  in symsrc__init()
1268 static u64 max_text_section(Elf *elf, GElf_Ehdr *ehdr)  in max_text_section()  argument
1279 	/* ELF is corrupted/truncated, avoid calling elf_strptr. */  in max_text_section()
1280 	if (!elf_rawdata(elf_getscn(elf, ehdr->e_shstrndx), NULL))  in max_text_section()
1283 	while ((sec = elf_nextscn(elf, sec)) != NULL) {  in max_text_section()
1293 		sec_name = elf_strptr(elf, ehdr->e_shstrndx, shdr.sh_name);  in max_text_section()
1480 	Elf *elf;  in dso__load_sym_internal()  local
1488 	elf = syms_ss->elf;  in dso__load_sym_internal()
1498 	if (elf_section_by_name(runtime_ss->elf, &runtime_ss->ehdr, &tshdr,  in dso__load_sym_internal()
1511 	sec = elf_getscn(elf, shdr.sh_link);  in dso__load_sym_internal()
1519 	sec_strndx = elf_getscn(runtime_ss->elf, runtime_ss->ehdr.e_shstrndx);  in dso__load_sym_internal()
1527 	sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);  in dso__load_sym_internal()
1573 		max_text_sh_offset = max_text_section(runtime_ss->elf, &runtime_ss->ehdr);  in dso__load_sym_internal()
1587 		/* Reject ARM ELF "mapping symbols": these aren't unique and  in dso__load_sym_internal()
1596 		/* Reject RISCV ELF "mapping symbols" */  in dso__load_sym_internal()
1606 			sym.st_shndx = elf_addr_to_index(runtime_ss->elf,  in dso__load_sym_internal()
1623 		sec = elf_getscn(syms_ss->elf, sym.st_shndx);  in dso__load_sym_internal()
1649 			sec = elf_getscn(runtime_ss->elf, sym.st_shndx);  in dso__load_sym_internal()
1682 			if (elf_read_program_header(runtime_ss->elf,  in dso__load_sym_internal()
1695 				 * is not necessary for normal C ELF file, we  in dso__load_sym_internal()
1804 static int elf_read_maps(Elf *elf, bool exe, mapfn_t mapfn, void *data)  in elf_read_maps()  argument
1811 	if (elf_getphdrnum(elf, &phdrnum))  in elf_read_maps()
1815 		if (gelf_getphdr(elf, i, &phdr) == NULL)  in elf_read_maps()
1840 	Elf *elf;  in file__read_maps()  local
1842 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in file__read_maps()
1843 	if (elf == NULL)  in file__read_maps()
1847 		*is_64_bit = (gelf_getclass(elf) == ELFCLASS64);  in file__read_maps()
1849 	err = elf_read_maps(elf, exe, mapfn, data);  in file__read_maps()
1851 	elf_end(elf);  in file__read_maps()
1860 	Elf *elf;  in dso__type_fd()  local
1862 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in dso__type_fd()
1863 	if (elf == NULL)  in dso__type_fd()
1866 	ek = elf_kind(elf);  in dso__type_fd()
1870 	if (gelf_getclass(elf) == ELFCLASS64) {  in dso__type_fd()
1875 	if (gelf_getehdr(elf, &ehdr) == NULL)  in dso__type_fd()
1883 	elf_end(elf);  in dso__type_fd()
1932 	Elf *elf;  member
1944 	kcore->elf = elf_begin(kcore->fd, ELF_C_READ, NULL);  in kcore__open()
1945 	if (!kcore->elf)  in kcore__open()
1948 	kcore->elfclass = gelf_getclass(kcore->elf);  in kcore__open()
1952 	ehdr = gelf_getehdr(kcore->elf, &kcore->ehdr);  in kcore__open()
1959 	elf_end(kcore->elf);  in kcore__open()
1977 	kcore->elf = elf_begin(kcore->fd, ELF_C_WRITE, NULL);  in kcore__init()
1978 	if (!kcore->elf)  in kcore__init()
1981 	if (!gelf_newehdr(kcore->elf, elfclass))  in kcore__init()
1989 	elf_end(kcore->elf);  in kcore__init()
1998 	elf_end(kcore->elf);  in kcore__close()
2029 	if (!gelf_update_ehdr(to->elf, ehdr))  in kcore__copy_hdr()
2032 	if (!gelf_newphdr(to->elf, count))  in kcore__copy_hdr()
2052 	if (!gelf_update_phdr(kcore->elf, idx, &phdr))  in kcore__add_phdr()
2060 	return elf_update(kcore->elf, ELF_C_WRITE);  in kcore__write()
2272 static int kcore_copy__read_maps(struct kcore_copy_info *kci, Elf *elf)  in kcore_copy__read_maps()  argument
2274 	if (elf_read_maps(elf, true, kcore_copy__read_map, kci) < 0)  in kcore_copy__read_maps()
2339 				 Elf *elf)  in kcore_copy__calc_maps()  argument
2377 	if (kcore_copy__read_maps(kci, elf))  in kcore_copy__calc_maps()
2527 	if (kcore_copy__calc_maps(&kci, from_dir, kcore.elf))  in kcore_copy()
2536 	offset = gelf_fsize(extract.elf, ELF_T_EHDR, 1, EV_CURRENT) +  in kcore_copy()
2537 		 gelf_fsize(extract.elf, ELF_T_PHDR, kci.phnum, EV_CURRENT);  in kcore_copy()
2660  * @elf: elf of the opened file
2666  * Responsible for parsing the @data in section .note.stapsdt in @elf and
2669 static int populate_sdt_note(Elf **elf, const char *data, size_t len,  in populate_sdt_note()  argument
2685 		.d_size = gelf_fsize((*elf), ELF_T_ADDR, NR_ADDR, EV_CURRENT),  in populate_sdt_note()
2706 	if (gelf_xlatetom(*elf, &dst, &src,  in populate_sdt_note()
2707 			  elf_getident(*elf, NULL)[EI_DATA]) == NULL) {  in populate_sdt_note()
2749 	if (gelf_getclass(*elf) == ELFCLASS32) {  in populate_sdt_note()
2757 	if (!gelf_getehdr(*elf, &ehdr)) {  in populate_sdt_note()
2758 		pr_debug("%s : cannot get elf header.\n", __func__);  in populate_sdt_note()
2770 	if (elf_section_by_name(*elf, &ehdr, &shdr, SDT_BASE_SCN, NULL))  in populate_sdt_note()
2774 	if (elf_section_by_name(*elf, &ehdr, &shdr, SDT_PROBES_SCN, NULL))  in populate_sdt_note()
2794  * @elf : elf to look into
2797  * Scans the sections in 'elf' for the section
2801 static int construct_sdt_notes_list(Elf *elf, struct list_head *sdt_notes)  in construct_sdt_notes_list()  argument
2812 	if (gelf_getehdr(elf, &ehdr) == NULL) {  in construct_sdt_notes_list()
2816 	if (elf_getshdrstrndx(elf, &shstrndx) != 0) {  in construct_sdt_notes_list()
2822 	scn = elf_section_by_name(elf, &ehdr, &shdr, SDT_NOTE_SCN, NULL);  in construct_sdt_notes_list()
2845 			ret = populate_sdt_note(&elf, ((data->d_buf) + desc_off),  in construct_sdt_notes_list()
2864  * the ELF and then calls construct_sdt_notes_list.
2868 	Elf *elf;  in get_sdt_note_list()  local
2875 	elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);  in get_sdt_note_list()
2876 	if (!elf) {  in get_sdt_note_list()
2880 	ret = construct_sdt_notes_list(elf, head);  in get_sdt_note_list()
2881 	elf_end(elf);  in get_sdt_note_list()