Based on Linus' patch. Link: https://lore.kernel.org/lkml/CAHk-=wgjTMQgiKzBZTmb=uWGDEQxDdyF1+qxBkODYciuNsmwnw@xxxxxxxxxxxxxx/ Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx> --- scripts/Makefile.lib | 31 ++++++++++++++++--------------- scripts/Makefile.vmlinux_o | 17 ++++++++--------- 2 files changed, 24 insertions(+), 24 deletions(-) diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index b594705d571a..731f735240f8 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -229,25 +229,26 @@ ifdef CONFIG_OBJTOOL objtool := $(objtree)/tools/objtool/objtool -objtool_args = \ - $(if $(CONFIG_HAVE_JUMP_LABEL_HACK), --hacks=jump_label) \ - $(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr) \ - $(if $(CONFIG_X86_KERNEL_IBT), --ibt) \ - $(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) \ - $(if $(CONFIG_UNWINDER_ORC), --orc) \ - $(if $(CONFIG_RETPOLINE), --retpoline) \ - $(if $(CONFIG_RETHUNK), --rethunk) \ - $(if $(CONFIG_SLS), --sls) \ - $(if $(CONFIG_STACK_VALIDATION), --stackval) \ - $(if $(CONFIG_HAVE_STATIC_CALL_INLINE), --static-call) \ - $(if $(CONFIG_HAVE_UACCESS_VALIDATION), --uaccess) \ +objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label +objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr +objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt +objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount +objtool-args-$(CONFIG_UNWINDER_ORC) += --orc +objtool-args-$(CONFIG_RETPOLINE) += --retpoline +objtool-args-$(CONFIG_RETHUNK) += --rethunk +objtool-args-$(CONFIG_SLS) += --sls +objtool-args-$(CONFIG_STACK_VALIDATION) += --stackval +objtool-args-$(CONFIG_HAVE_STATIC_CALL_INLINE) += --static-call +objtool-args-$(CONFIG_HAVE_UACCESS_VALIDATION) += --uaccess +objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable + +objtool-args = $(objtool-args-y) \ $(if $(delay-objtool), --link) \ - $(if $(part-of-module), --module) \ - $(if $(CONFIG_GCOV_KERNEL), --no-unreachable) + $(if $(part-of-module), --module) delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT)) -cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool_args) $@) +cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@) cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd) endif # CONFIG_OBJTOOL diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o index 81a4e0484457..df928a6717a1 100644 --- a/scripts/Makefile.vmlinux_o +++ b/scripts/Makefile.vmlinux_o @@ -35,18 +35,17 @@ endif objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) -# Reuse objtool_args defined in scripts/Makefile.lib if LTO or IBT is enabled. +# Reuse objtool-args-y defined in scripts/Makefile.lib if LTO or IBT is enabled. +# (Expand objtool-args-y to a simple variable to avoid circular reference) # # Add some more flags as needed. -# --no-unreachable and --link might be added twice, but it is fine. -# -# Expand objtool_args to a simple variable to avoid circular reference. +# --no-unreachable might be added twice, but it is fine. + +objtool-args-$(delay-objtool) := $(objtool-args-y) +objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable +objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret)) -objtool_args := \ - $(if $(delay-objtool),$(objtool_args)) \ - $(if $(CONFIG_NOINSTR_VALIDATION), --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret)) \ - $(if $(CONFIG_GCOV_KERNEL), --no-unreachable) \ - --link +objtool-args = $(objtool-args-y) --link # Link of vmlinux.o used for section mismatch analysis # --------------------------------------------------------------------------- -- 2.34.1
