# Step 3 is used to place certain information in the module's ELF
# section, including information such as:
-# Version magic (see include/vermagic.h for full details)
+# Version magic (see include/linux/vermagic.h for full details)
# - Kernel release
# - SMP is CONFIG_SMP
# - PREEMPT is CONFIG_PREEMPT
# - See include/linux/module.h for more details
# Step 4 is solely used to allow module versioning in external modules,
-# where the CRC of each module is retrieved from the Module.symers file.
+# where the CRC of each module is retrieved from the Module.symvers file.
# 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.
-# This is solely usefull to speed up test compiles
+# This is solely useful to speed up test compiles
PHONY := _modpost
_modpost: __modpost
include include/config/auto.conf
include scripts/Kbuild.include
+
+# When building external modules load the Kbuild file to retrieve EXTRA_SYMBOLS info
+ifneq ($(KBUILD_EXTMOD),)
+
+# set src + obj - they may be used when building the .mod.c file
+obj := $(KBUILD_EXTMOD)
+src := $(obj)
+
+# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
+include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \
+ $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile)
+endif
+
include scripts/Makefile.lib
kernelsymfile := $(objtree)/Module.symvers
# Stop after building .o files if NOFINAL is set. Makes compile tests quicker
_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))
+ifneq ($(KBUILD_BUILDHOST),$(ARCH))
+ cross_build := 1
+endif
# 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_DEBUG_SECTION_MISMATCH),,-S) \
+ $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \
+ $(if $(cross_build),-c) \
+ $(if $(CONFIG_ENTERPRISE_SUPPORT), \
+ -N $(firstword $(wildcard $(dir $(MODVERDIR))/Module.supported \
+ $(objtree)/Module.supported \
+ $(srctree)/Module.supported /dev/null)))
+
quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
- cmd_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),-o $(modulesymfile)) \
- $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \
- $(wildcard vmlinux) $(filter-out FORCE,$^)
+ cmd_modpost = $(modpost) -s
PHONY += __modpost
__modpost: $(modules:.ko=.o) FORCE
- $(call cmd,modpost)
+ $(call cmd,modpost) $(wildcard vmlinux) $(filter-out FORCE,$^)
quiet_cmd_kernel-mod = MODPOST $@
- cmd_kernel-mod = $(cmd_modpost)
+ cmd_kernel-mod = $(modpost) $@
-vmlinux: FORCE
+vmlinux.o: FORCE
$(call cmd,kernel-mod)
# Declare generated files as targets for modpost
modname = $(notdir $(@:.mod.o=))
quiet_cmd_cc_o_c = CC $@
- cmd_cc_o_c = $(CC) $(c_flags) $(CFLAGS_MODULE) \
+ cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \
-c -o $@ $<
$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE
# Step 6), final link of the modules
quiet_cmd_ld_ko_o = LD [M] $@
- cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \
- $(filter-out FORCE,$^)
+ cmd_ld_ko_o = $(LD) -r $(LDFLAGS) \
+ $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
+ -o $@ $(filter-out FORCE,$^)
$(modules): %.ko :%.o %.mod.o FORCE
$(call if_changed,ld_ko_o)