diff options
Diffstat (limited to 'scripts/Makefile.modpost')
| -rw-r--r-- | scripts/Makefile.modpost | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost index 08dce14f2dc..002089141df 100644 --- a/scripts/Makefile.modpost +++ b/scripts/Makefile.modpost @@ -14,7 +14,8 @@ # 3) create one <module>.mod.c file pr. module # 4) create one Module.symvers file with CRC for all exported symbols # 5) compile all <module>.mod.c files -# 6) final link of the module to a <module.ko> file +# 6) final link of the module to a <module.ko> (or <module.unsigned>) file +# 7) signs the modules to a <module.ko> file # Step 3 is used to place certain information in the module's ELF # section, including information such as: @@ -32,6 +33,8 @@ # Step 4 is solely used to allow module versioning in external modules, # where the CRC of each module is retrieved from the Module.symvers file. +# Step 7 is dependent on CONFIG_MODULE_SIG being enabled. + # KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined # symbols in the final module linking stage # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. @@ -60,7 +63,7 @@ kernelsymfile := $(objtree)/Module.symvers modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers # Step 1), find all modules listed in $(MODVERDIR)/ -__modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod))) +__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod))) modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) # Stop after building .o files if NOFINAL is set. Makes compile tests quicker @@ -116,6 +119,7 @@ $(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE targets += $(modules:.ko=.mod.o) # Step 6), final link of the modules +ifneq ($(CONFIG_MODULE_SIG),y) quiet_cmd_ld_ko_o = LD [M] $@ cmd_ld_ko_o = $(LD) -r $(LDFLAGS) \ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ @@ -125,7 +129,78 @@ $(modules): %.ko :%.o %.mod.o FORCE $(call if_changed,ld_ko_o) targets += $(modules) +else +quiet_cmd_ld_ko_unsigned_o = LD [M] $@ + cmd_ld_ko_unsigned_o = \ + $(LD) -r $(LDFLAGS) \ + $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ + -o $@ $(filter-out FORCE,$^) \ + $(if $(AFTER_LINK),; $(AFTER_LINK)) + +$(modules:.ko=.ko.unsigned): %.ko.unsigned :%.o %.mod.o FORCE + $(call if_changed,ld_ko_unsigned_o) + +targets += $(modules:.ko=.ko.unsigned) + +# Step 7), sign the modules +MODSECKEY = ./signing_key.priv +MODPUBKEY = ./signing_key.x509 + +ifeq ($(wildcard $(MODSECKEY))+$(wildcard $(MODPUBKEY)),$(MODSECKEY)+$(MODPUBKEY)) +ifeq ($(KBUILD_SRC),) + # no O= is being used + SCRIPTS_DIR := scripts +else + SCRIPTS_DIR := $(KBUILD_SRC)/scripts +endif +SIGN_MODULES := 1 +else +SIGN_MODULES := 0 +endif + +# only sign if it's an in-tree module +ifneq ($(KBUILD_EXTMOD),) +SIGN_MODULES := 0 +endif +# We strip the module as best we can - note that using both strip and eu-strip +# results in a smaller module than using either alone. +EU_STRIP = $(shell which eu-strip || echo true) + +quiet_cmd_sign_ko_stripped_ko_unsigned = STRIP [M] $@ + cmd_sign_ko_stripped_ko_unsigned = \ + cp $< $@ && \ + strip -x -g $@ && \ + $(EU_STRIP) $@ + +ifeq ($(SIGN_MODULES),1) + +quiet_cmd_genkeyid = GENKEYID $@ + cmd_genkeyid = \ + perl $(SCRIPTS_DIR)/x509keyid $< $<.signer $<.keyid + +%.signer %.keyid: % + $(call if_changed,genkeyid) + +KEYRING_DEP := $(MODSECKEY) $(MODPUBKEY) $(MODPUBKEY).signer $(MODPUBKEY).keyid +quiet_cmd_sign_ko_ko_stripped = SIGN [M] $@ + cmd_sign_ko_ko_stripped = \ + sh $(SCRIPTS_DIR)/sign-file $(MODSECKEY) $(MODPUBKEY) $< $@ +else +KEYRING_DEP := +quiet_cmd_sign_ko_ko_unsigned = NO SIGN [M] $@ + cmd_sign_ko_ko_unsigned = \ + cp $< $@ +endif + +$(modules): %.ko :%.ko.stripped $(KEYRING_DEP) FORCE + $(call if_changed,sign_ko_ko_stripped) + +$(patsubst %.ko,%.ko.stripped,$(modules)): %.ko.stripped :%.ko.unsigned FORCE + $(call if_changed,sign_ko_stripped_ko_unsigned) + +targets += $(modules) +endif # Add FORCE to the prequisites of a target to force it to be always rebuilt. # --------------------------------------------------------------------------- |