On Sat, Dec 09, 2023 at 07:59:17AM +0900, Masami Hiramatsu wrote: > On Fri, 8 Dec 2023 00:07:48 -0500 > Kris Van Hees <kris.van.hees@xxxxxxxxxx> wrote: > > > The CONFIG_BUILTIN_RANGES option controls whether offset range data is > > generated for kernel modules that are built into the kernel image. > > > > Signed-off-by: Kris Van Hees <kris.van.hees@xxxxxxxxxx> > > Reviewed-by: Nick Alcock <nick.alcock@xxxxxxxxxx> > > Reviewed-by: Alan Maguire <alan.maguire@xxxxxxxxxx> > > --- > > kernel/module/Kconfig | 17 +++++++++++++++++ > > 1 file changed, 17 insertions(+) > > > > diff --git a/kernel/module/Kconfig b/kernel/module/Kconfig > > index 33a2e991f608..0798439b11ac 100644 > > --- a/kernel/module/Kconfig > > +++ b/kernel/module/Kconfig > > @@ -389,4 +389,21 @@ config MODULES_TREE_LOOKUP > > def_bool y > > depends on PERF_EVENTS || TRACING || CFI_CLANG > > > > +config BUILTIN_RANGES > > BUILTIN_MODULE_RANGES ? Ah yes, thank you. Will fix in v2. > BTW, even if CONFIG_MODULES=n, we can embed the kernel module code. > So should this visible if the CONFIG_MODULES=n ? That is a very good point. And in that case, the ranges information should still be produced when this option is set. I will move the option to a more appropriate location, not depending on CONFIG_MODULES. > Thank you, Thank you for your feedback! > > + bool "Generate address range information for builtin modules" > > + depends on VMLINUX_MAP > > + help > > + When modules are built into the kernel, there will be no module name > > + associated with its symbols in /proc/kallsyms. Tracers may want to > > + identify symbols by module name and symbol name regardless of whether > > + the module is configured as loadable or not. > > + > > + This option generates modules.builtin.ranges in the build tree with > > + offset ranges (per ELF section) for the module(s) they belong to. > > + It also records an anchor symbol to determine the load address of the > > + section. > > + > > + It is fully compatible with CONFIG_RANDOMIZE_BASE and similar late- > > + address-modification options. > > + > > endif # MODULES > > -- > > 2.42.0 > > > > > -- > Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
