lib/bpf/elf.c

29 	Elf *elf;
32 		pr_warn("elf: failed to init libelf for %s\n", binary_path);
38 		pr_warn("elf: failed to open %s: %s\n", binary_path,
42 	elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
43 	if (!elf) {
44 		pr_warn("elf: could not read elf from %s: %s\n", binary_path, elf_errmsg(-1));
49 	elf_fd->elf = elf;
57 	elf_end(elf_fd->elf);
62 static Elf_Scn *elf_find_next_scn_by_type(Elf *elf, int sh_type, Elf_Scn *scn)
64 	while ((scn = elf_nextscn(elf, scn)) != NULL) {
84 	Elf *elf;
97 			    Elf *elf, const char *binary_path,
106 	if (!gelf_getehdr(elf, &ehdr)) {
107 		pr_warn("elf: failed to get ehdr from %s: %s\n", binary_path, elf_errmsg(-1));
111 	scn = elf_find_next_scn_by_type(elf, sh_type, NULL);
113 		pr_debug("elf: failed to find symbol table ELF sections in '%s'\n",
124 		pr_warn("elf: failed to get symbols for symtab section in '%s': %s\n",
129 	iter->elf = elf;
136 	scn = elf_find_next_scn_by_type(elf, SHT_GNU_versym, NULL);
141 	scn = elf_find_next_scn_by_type(elf, SHT_GNU_verdef, NULL);
147 		pr_warn("elf: failed to get verdef ELF section in '%s'\n", binary_path);
169 		name = elf_strptr(iter->elf, iter->strtabidx, sym->st_name);
172 		sym_scn = elf_getscn(iter->elf, sym->st_shndx);
217 		return elf_strptr(iter->elf, iter->verdef_strtabidx, verdaux.vda_name);
272  * the path to the ELF binary represented by "elf", and only used for error
276 long elf_find_func_offset(Elf *elf, const char *binary_path, const char *name)
285 	if (!gelf_getehdr(elf, &ehdr)) {
286 		pr_warn("elf: failed to get ehdr from %s: %s\n", binary_path, elf_errmsg(-1));
317 		ret = elf_sym_iter_new(&iter, elf, binary_path, sh_types[i], STT_FUNC);
336 					pr_warn("elf: ambiguous match for '%s', '%s' in '%s'\n",
356 		pr_debug("elf: symbol address match for '%s' in '%s': 0x%lx\n", name, binary_path,
360 			pr_warn("elf: '%s' is 0 in symtab for '%s': %s\n", name, binary_path,
365 			pr_warn("elf: failed to find symbol '%s' in '%s'\n", name, binary_path);
383 	ret = elf_find_func_offset(elf_fd.elf, binary_path, name);
440 		err = elf_sym_iter_new(&iter, elf_fd.elf, binary_path, sh_types[i], st_type);
466 					pr_warn("elf: ambiguous match found '%s@%lu' in '%s' previous offset %lu\n",
521 		err = elf_sym_iter_new(&iter, elf_fd.elf, binary_path, sh_types[i], STT_FUNC);