The upcoming module hashes functionality will build the modules in between the generation of the BTF data and the final link of vmlinux. At this point vmlinux is not yet built and therefore can't be used for module BTF generation. vmlinux.unstripped however is usable and sufficient for BTF generation.
Signed-off-by: Thomas Weißschuh <[email protected]> Reviewed-by: Nicolas Schier <[email protected]> --- scripts/Makefile.modfinal | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal index adcbcde16a07..b09040ccddd2 100644 --- a/scripts/Makefile.modfinal +++ b/scripts/Makefile.modfinal @@ -38,12 +38,14 @@ quiet_cmd_ld_ko_o = LD [M] $@ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ -T $(objtree)/scripts/module.lds -o $@ $(filter %.o, $^) +btf-vmlinux := $(if $(KBUILD_EXTMOD),vmlinux,vmlinux.unstripped) + quiet_cmd_btf_ko = BTF [M] $@ cmd_btf_ko = \ - if [ ! -f $(objtree)/vmlinux ]; then \ - printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ + if [ ! -f $(objtree)/$(btf-vmlinux) ]; then \ + printf "Skipping BTF generation for %s due to unavailability of $(btf-vmlinux)\n" $@ 1>&2; \ else \ - $(CONFIG_SHELL) $(srctree)/scripts/gen-btf.sh --btf_base $(objtree)/vmlinux $@; \ + $(CONFIG_SHELL) $(srctree)/scripts/gen-btf.sh --btf_base $(objtree)/$(btf-vmlinux) $@; \ fi; # Same as newer-prereqs, but allows to exclude specified extra dependencies @@ -55,8 +57,8 @@ if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) # Re-generate module BTFs if either module's .ko or vmlinux changed -%.ko: %.o %.mod.o .module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(objtree)/vmlinux) FORCE - +$(call if_changed_except,ld_ko_o,$(objtree)/vmlinux) +%.ko: %.o %.mod.o .module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(objtree)/$(btf-vmlinux)) FORCE + +$(call if_changed_except,ld_ko_o,$(objtree)/$(btf-vmlinux)) ifdef CONFIG_DEBUG_INFO_BTF_MODULES +$(if $(newer-prereqs),$(call cmd,btf_ko)) endif -- 2.54.0
