kallsyms__get_function_start
err = kallsyms__get_function_start(from, name, &addr1);
if (kallsyms__get_function_start(to, name, &addr2))
int kallsyms__get_function_start(const char *kallsyms_filename,
err = kallsyms__get_function_start(filename, name, &addr);
if (kallsyms__get_function_start(kallsyms_filename,
if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) {
if (!kallsyms__get_function_start(kallsyms_filename,
if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr))