diff options
Diffstat (limited to 'scripts/Makefile.modpost')
| -rw-r--r-- | scripts/Makefile.modpost | 133 |
1 files changed, 41 insertions, 92 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost index 6b19c1a4eae5..952fff485546 100644 --- a/scripts/Makefile.modpost +++ b/scripts/Makefile.modpost @@ -15,15 +15,13 @@ # 2) modpost is then used to # 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 # Step 3 is used to place certain information in the module's ELF # section, including information such as: # Version magic (see include/linux/vermagic.h for full details) # - Kernel release # - SMP is CONFIG_SMP -# - PREEMPT is CONFIG_PREEMPT +# - PREEMPT is CONFIG_PREEMPT[_RT] # - GCC Version # Module info # - Module version (MODULE_VERSION) @@ -38,12 +36,37 @@ # symbols in the final module linking stage # KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. # This is solely useful to speed up test compiles -PHONY := _modpost -_modpost: __modpost + +PHONY := __modpost +__modpost: include include/config/auto.conf include scripts/Kbuild.include +kernelsymfile := $(objtree)/Module.symvers +modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers + +MODPOST = scripts/mod/modpost \ + $(if $(CONFIG_MODVERSIONS),-m) \ + $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \ + $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \ + $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \ + $(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS))) \ + $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \ + $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \ + $(if $(KBUILD_MODPOST_WARN),-w) \ + $(if $(filter nsdeps,$(MAKECMDGOALS)),-d) + +ifdef MODPOST_VMLINUX + +quiet_cmd_modpost = MODPOST vmlinux.o + cmd_modpost = $(MODPOST) vmlinux.o + +__modpost: + $(call cmd,modpost) + +else + # When building external modules load the Kbuild file to retrieve EXTRA_SYMBOLS info ifneq ($(KBUILD_EXTMOD),) @@ -56,99 +79,25 @@ include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \ $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile) endif -include scripts/Makefile.lib +MODPOST += $(subst -i,-n,$(filter -i,$(MAKEFLAGS))) -s -T - $(wildcard vmlinux) -kernelsymfile := $(objtree)/Module.symvers -modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers +# find all modules listed in modules.order +modules := $(sort $(shell cat $(MODORDER))) -modorder := $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)modules.order +# Read out modules.order instead of expanding $(modules) to pass in modpost. +# Otherwise, allmodconfig would fail with "Argument list too long". +quiet_cmd_modpost = MODPOST $(words $(modules)) modules + cmd_modpost = sed 's/ko$$/o/' $(MODORDER) | $(MODPOST) -# Step 1), find all modules listed in modules.order -ifdef CONFIG_MODULES -modules := $(sort $(shell cat $(modorder))) +__modpost: + @$(kecho) ' Building modules, stage 2.' + $(call cmd,modpost) +ifneq ($(KBUILD_MODPOST_NOFINAL),1) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal endif -# Stop after building .o files if NOFINAL is set. Makes compile tests quicker -_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules)) - -# Step 2), invoke modpost -# Includes step 3,4 -modpost = scripts/mod/modpost \ - $(if $(CONFIG_MODVERSIONS),-m) \ - $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \ - $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \ - $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \ - $(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \ - $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \ - $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \ - $(if $(KBUILD_MODPOST_WARN),-w) - -MODPOST_OPT=$(subst -i,-n,$(filter -i,$(MAKEFLAGS))) - -# We can go over command line length here, so be careful. -quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules - cmd_modpost = sed 's/ko$$/o/' $(modorder) | $(modpost) $(MODPOST_OPT) -s -T - - -PHONY += __modpost -__modpost: $(modules:.ko=.o) FORCE - $(call cmd,modpost) $(wildcard vmlinux) - -quiet_cmd_kernel-mod = MODPOST $@ - cmd_kernel-mod = $(modpost) $@ - -vmlinux.o: FORCE - $(call cmd,kernel-mod) - -# Declare generated files as targets for modpost -$(modules:.ko=.mod.c): __modpost ; - - -# Step 5), compile all *.mod.c files - -# modname is set to make c_flags define KBUILD_MODNAME -modname = $(notdir $(@:.mod.o=)) - -quiet_cmd_cc_o_c = CC $@ - cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \ - -c -o $@ $< - -$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE - $(call if_changed_dep,cc_o_c) - -targets += $(modules:.ko=.mod.o) - -ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) - -# Step 6), final link of the modules with optional arch pass after final link -quiet_cmd_ld_ko_o = LD [M] $@ - cmd_ld_ko_o = \ - $(LD) -r $(KBUILD_LDFLAGS) \ - $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ - -o $@ $(real-prereqs) ; \ - $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) - -$(modules): %.ko :%.o %.mod.o FORCE - +$(call if_changed,ld_ko_o) - -targets += $(modules) - - -# Add FORCE to the prequisites of a target to force it to be always rebuilt. -# --------------------------------------------------------------------------- - -PHONY += FORCE - -FORCE: - -# Read all saved command lines and dependencies for the $(targets) we -# may be building above, using $(if_changed{,_dep}). As an -# optimization, we don't need to read them if the target does not -# exist, we will rebuild anyway in that case. - -cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) +nsdeps: __modpost -ifneq ($(cmd_files),) - include $(cmd_files) endif .PHONY: $(PHONY) |