kernel/module/kallsyms.c

3  * Module kallsyms support
10 #include <linux/kallsyms.h>
182 	mod->kallsyms = (void __rcu *)init_data_base +
187 	rcu_dereference(mod->kallsyms)->symtab = (void *)symsec->sh_addr;
188 	rcu_dereference(mod->kallsyms)->num_symtab = symsec->sh_size / sizeof(Elf_Sym);
190 	rcu_dereference(mod->kallsyms)->strtab =
192 	rcu_dereference(mod->kallsyms)->typetab = init_data_base + info->init_typeoffs;
195 	 * Now populate the cut down core kallsyms for after init
202 	src = rcu_dereference(mod->kallsyms)->symtab;
203 	for (ndst = i = 0; i < rcu_dereference(mod->kallsyms)->num_symtab; i++) {
204 		rcu_dereference(mod->kallsyms)->typetab[i] = elf_type(src + i, info);
211 			    rcu_dereference(mod->kallsyms)->typetab[i];
215 				      &rcu_dereference(mod->kallsyms)->strtab[src[i].st_name],
247 static const char *kallsyms_symbol_name(struct mod_kallsyms *kallsyms, unsigned int symnum)
249 	return kallsyms->strtab + kallsyms->symtab[symnum].st_name;
263 	struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
274 	bestval = kallsyms_symbol_value(&kallsyms->symtab[best]);
280 	for (i = 1; i < kallsyms->num_symtab; i++) {
281 		const Elf_Sym *sym = &kallsyms->symtab[i];
291 		if (*kallsyms_symbol_name(kallsyms, i) == '\0' ||
292 		    is_mapping_symbol(kallsyms_symbol_name(kallsyms, i)))
311 	return kallsyms_symbol_name(kallsyms, best);
321  * For kallsyms to ask for address resolution.  NULL means not found.  Careful
391 		struct mod_kallsyms *kallsyms;
395 		kallsyms = rcu_dereference_sched(mod->kallsyms);
396 		if (symnum < kallsyms->num_symtab) {
397 			const Elf_Sym *sym = &kallsyms->symtab[symnum];
400 			*type = kallsyms->typetab[symnum];
401 			strscpy(name, kallsyms_symbol_name(kallsyms, symnum), KSYM_NAME_LEN);
407 		symnum -= kallsyms->num_symtab;
417 	struct mod_kallsyms *kallsyms = rcu_dereference_sched(mod->kallsyms);
419 	for (i = 0; i < kallsyms->num_symtab; i++) {
420 		const Elf_Sym *sym = &kallsyms->symtab[i];
422 		if (strcmp(name, kallsyms_symbol_name(kallsyms, i)) == 0 &&
486 		struct mod_kallsyms *kallsyms;
496 		kallsyms = rcu_dereference_sched(mod->kallsyms);
499 		for (i = 0; i < kallsyms->num_symtab; i++) {
500 			const Elf_Sym *sym = &kallsyms->symtab[i];
505 			ret = fn(data, kallsyms_symbol_name(kallsyms, i),