1 # kernel_LIBRARIES .. list of the kernel-space libraries
2 # rtlinux_LIBRARIES.. list of the RT-Linux kernel-space libraries
3 # kernel_HEADERS .. list of the kernel-space public header files
4 # rtlinux_HEADERS .. list of the RT-Linux kernel-space public header files
5 # kernel_MODULES .. list of the kernel side modules/applications
6 # rtlinux_MODULES .. list of RT-Linux the kernel side modules/applications
7 # kernel_INCLUDES .. additional include directories and defines for kernel-space
8 # rtlinux_INCLUDES .. additional include directories and defines for RT-Linux
9 # OMIT_KERNEL_PASSES if defined, all kernel passes are omited
10 # LINUX_DIR .. location of Linux kernel sources
11 # RTL_DIR .. location of RT-Linux sources
13 KERN_INCLUDE_DIR := $(OUTPUT_DIR)/$(COMPILED_DIR_NAME)/include-kern
14 KERN_LIB_DIR := $(OUTPUT_DIR)/$(COMPILED_DIR_NAME)/lib-kern
15 KERN_MODULES_DIR := $(OUTPUT_DIR)/$(COMPILED_DIR_NAME)/modules
16 KERN_BUILD_DIR := $(OUTPUT_DIR)/$(BUILD_DIR_NAME)/kern
17 KERN_MODPOST_DIR := $(OUTPUT_DIR)/$(BUILD_DIR_NAME)/kern-modpost
20 LINUX_VERSION=$(shell uname -r)
23 LINUX_DIR=/lib/modules/$(LINUX_VERSION)/build
26 KERN_OBJS_DIR = $(KERN_BUILD_DIR)/$(RELATIVE_DIR)
28 kernel-lib-pass: include-pass
29 kernel-mod-pass: kernel-lib-pass
30 kernel-modpost-pass: kernel-mod-pass
31 kernel-pass: kernel-mod-pass kernel-modpost-pass
33 #=====================================================================
34 # Kernel-space rules and templates to compile modules, libraries etc.
36 ifdef KERN_RULE_TEMPLATES
38 $(KERN_LIB_DIR)/kernel.mk: $(LINUX_DIR)/.config $(MAKERULES_DIR)/kernelcfg2mk
39 @$(QUIET_CMD_ECHO) " KCFG2MK $@"
40 $(Q) $(MAKERULES_DIR)/kernelcfg2mk $(LINUX_DIR) $(KERN_LIB_DIR)
42 ifeq ($(CONFIG_RTLINUX),y)
43 include $(RTL_DIR)/rtl.mk
46 kern_GCCLIB_DIR=$(shell LANG=C LC_ALL=C LC_MESSAGES=C $(CC) -print-search-dirs | $(SED4OMK) -n -e 's/^install: \(.*\)$$/\1/p' )
47 INCLUDES := -I $(KERN_INCLUDE_DIR) $(INCLUDE) $(rtlinux_INCLUDES) $(kernel_INCLUDES)
49 c_o_kern_COMPILE = $(KERN_CC) -idirafter $(kern_GCCLIB_DIR)/include $(INCLUDES) $(CFLAGS) -DOMK_FOR_KERNEL -DEXPORT_SYMTAB -nostdinc
50 cc_o_kern_COMPILE = $(CXX) $(INCLUDES) $(CXXFLAGS) -DOMK_FOR_KERNEL -DEXPORT_SYMTAB
58 include $(KERN_LIB_DIR)/kernel.mk
61 LINUX_SRC = $(LINUX_DIR)
63 kernel_INCLUDES += -I $(KERN_INCLUDE_DIR) -I $(LINUX_DIR) -idirafter $(LINUX_SRC)/include/linux
67 kern_GCCLIB_DIR=$(shell LANG=C LC_ALL=C LC_MESSAGES=C $(LINUX_CC) -print-search-dirs | $(SED4OMK) -n -e 's/^install: \(.*\)$$/\1/p' )
69 KERN_CC = echo KERN_CC not defined - compilation skipped
71 c_o_kern_COMPILE = $(KERN_CC) $(kernel_INCLUDES) -idirafter $(kern_GCCLIB_DIR)/include $(LINUX_CPPFLAGS) $(LINUX_CFLAGS) $(LINUX_CFLAGS_MODULE) -DOMK_FOR_KERNEL -DEXPORT_SYMTAB -nostdinc
72 cc_o_kern_COMPILE = $(KERN_CC) $(kernel_INCLUDES) -idirafter $(kern_GCCLIB_DIR)/include $(LINUX_CPPFLAGS) $(LINUX_CFLAGS) $(LINUX_CFLAGS_MODULE) -DOMK_FOR_KERNEL -DEXPORT_SYMTAB
73 S_o_kern_COMPILE = $(KERN_CC) $(kernel_INCLUDES) -idirafter $(kern_GCCLIB_DIR)/include $(LINUX_CPPFLAGS) $(LINUX_AFLAGS) $(LINUX_AFLAGS_MODULE) -DOMK_FOR_KERNEL -DEXPORT_SYMTAB -nostdinc
74 KERN_EXE_SUFFIX := $(LINUX_MODULE_EXT)
75 KERN_LDFLAGS = $(LINUX_LDFLAGS) $(LINUX_LDFLAGS_MODULE)
77 KERN_ARCH = $(LINUX_ARCH)
79 KERN_ARCH = echo KERN_ARCH not defined - skipped
84 KERN_LD = echo KERN_LD not defined - skipped
91 ifeq ($(LINUX_QUOTE_MODNAME),y)
93 KERN_KBUILD_MODNAME=-D"KBUILD_MODNAME=((THIS_MODULE)!=NULL?(THIS_MODULE)->name:NULL)"
95 endif # CONFIG_RTLINUX
97 KERN_LOADLIBES += -L$(KERN_LIB_DIR)
99 KERN_LOADLIBES += $(rtlinux_LOADLIBES:%=-l%)
100 KERN_LOADLIBES += $(kernel_LOADLIBES:%=-l%)
104 # Check GCC version for kernel part of build
105 ifndef kern_CC_MAJOR_VERSION
106 kern_CC_MAJOR_VERSION := $(shell $(KERN_CC) -dumpversion | $(SED4OMK) -e 's/\([^.]\)\..*/\1/')
108 # Prepare suitable define for dependency building
109 ifeq ($(kern_CC_MAJOR_VERSION),2)
110 kern_CC_DEPFLAGS = -Wp,-MD,"$@.d.tmp"
112 kern_CC_DEPFLAGS = -MT $@ -MD -MP -MF "$@.d.tmp"
115 ifeq ($(KERN_EXE_SUFFIX),.ko)
116 ifeq ($(wildcard $(LINUX_DIR)/scripts/mod/modpost),)
117 KERN_MODPOST = $(LINUX_DIR)/scripts/modpost
119 KERN_MODPOST = $(LINUX_DIR)/scripts/mod/modpost
121 KERN_MODULES_LINK_DIR = $(KERN_MODPOST_DIR)
122 KERN_LINK_SUFFIX = .o
124 KERN_MODULES_LINK_DIR = $(KERN_MODULES_DIR)
125 KERN_LINK_SUFFIX = $(KERN_EXE_SUFFIX)
128 ifeq ($(LINUX_CONFIG_MODVERSIONS),y)
130 MODPOST_OPTS += -i $(LINUX_DIR)/Module.symvers
131 ifneq ($(LINUX_BUILDHOST),) # this is not correct point, it should look for 2.6.17 kernel
132 MODPOST_OPTS += -I $(KERN_LIB_DIR)/Module.symvers
134 MODPOST_OPTS += -o $(KERN_LIB_DIR)/Module.symvers
137 ifeq ($(LINUX_CONFIG_DEBUG_SECTION_MISMATCH),y)
141 ifeq ($(LINUX_CONFIG_MARKERS),y)
142 MODPOST_OPTS += -K $(LINUX_DIR)/Module.markers
143 MODPOST_OPTS += -M $(KERN_LIB_DIR)/Module.markers
146 ifeq ($(LINUX_KBUILD_MODPOST_WARN),y)
150 ifneq ($(LINUX_BUILDHOST),)
151 ifneq ($(LINUX_BUILDHOST),$(LINUX_ARCH))
156 define COMPILE_c_o_kern_template
159 @$(QUIET_CMD_ECHO) " CC [K] $$@"
160 $(Q) if $$(c_o_kern_COMPILE) $$(kern_CC_DEPFLAGS) $(3) $(KERN_KBUILD_MODNAME) \
161 -D"KBUILD_BASENAME=$(KERN_MQ)$(notdir $(basename $(1)))$(KERN_MQ)" \
163 then mv -f "$$@.d.tmp" "$$@.d" ; \
164 else rm -f "$$@.d.tmp" ; exit 1; \
170 define COMPILE_cc_o_kern_template
173 @$(QUIET_CMD_ECHO) " CXX [K] $$@"
174 $(Q) if $$(cc_o_kern_COMPILE) $$(kern_CC_DEPFLAGS) $(3) $(KERN_KBUILD_MODNAME) \
175 -D"KBUILD_BASENAME=$(KERN_MQ)$(notdir $(basename $(1)))$(KERN_MQ)" \
177 then mv -f "$$@.d.tmp" "$$@.d" ; \
178 else rm -f "$$@.d.tmp" ; exit 1; \
184 define COMPILE_S_o_kern_template
187 @$(QUIET_CMD_ECHO) " AS [K] $$@"
188 $(Q) if $$(S_o_kern_COMPILE) $$(kern_CC_DEPFLAGS) $(3) $(KERN_KBUILD_MODNAME) \
189 -D"KBUILD_BASENAME=$(KERN_MQ)$(notdir $(basename $(1)))$(KERN_MQ)" \
191 then mv -f "$$@.d.tmp" "$$@.d" ; \
192 else rm -f "$$@.d.tmp" ; exit 1; \
198 define MODULE_kern_template
199 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.c=%.o))
200 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cc=%.o))
201 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cxx=%.o))
202 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cpp=%.o))
203 $(1)_OBJS := $$(sort $$($(1)_OBJS))
205 KERN_OBJS += $$($(1)_OBJS)
206 KERN_SOURCES += $$($(1)_SOURCES)
208 # this is hack to build "__this_module" structure for 2.6.x kernels
209 # modpost is used for that purpose now
213 # #include <linux/version.h>@\
214 # #include <linux/module.h>@\
215 # #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,5))@\
216 # #include <linux/vermagic.h>@\
217 # #include <linux/compiler.h>@\
219 # MODULE_INFO(vermagic, VERMAGIC_STRING);@\
222 # struct module __this_module@\
223 # __attribute__((section(\".gnu.linkonce.this_module\"))) = {@\
224 # .name = __stringify(KBUILD_MODNAME),@\
225 # .init = init_module,@\
226 # #ifdef CONFIG_MODULE_UNLOAD@\
227 # .exit = cleanup_module,@\
234 #$(eval $(call COMPILE_c_o_kern_template,$(1).mod.c,$(1).mod.o,-DKBUILD_MODNAME=$(1)))
236 $(2)/$(1)$(KERN_LINK_SUFFIX): $$($(1)_OBJS)
237 @$(QUIET_CMD_ECHO) " LD [K] $$@"
238 $(Q) $$(KERN_LD) $$(KERN_LDFLAGS) -r $$($(1)_OBJS) -L$$(kern_GCCLIB_DIR) $$($(1)_LIBS:%=-l%) $$(KERN_LOADLIBES) -Map $(KERN_OBJS_DIR)/$(1).mod.map -o $$@
239 @echo "$(2)/$(1)$(KERN_LINK_SUFFIX): \\" >$(KERN_OBJS_DIR)/$(1).mod.d
240 @$(SED4OMK) -n -e 's/^LOAD \(.*\)$$$$/ \1 \\/p' $(KERN_OBJS_DIR)/$(1).mod.map >>$(KERN_OBJS_DIR)/$(1).mod.d
241 @echo >>$(KERN_OBJS_DIR)/$(1).mod.d
242 @if [ "$(KERN_EXE_SUFFIX)" = ".ko" ] ; then \
243 echo $(1) >>$(KERN_MODPOST_DIR)/module-changes ; \
244 echo $(1) >$(KERN_MODPOST_DIR)/$(1).mod.stamp ; \
251 define LIBRARY_kern_template
252 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.c=%.o))
253 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cc=%.o))
254 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cxx=%.o))
255 $(1)_OBJS += $$(filter %.o,$$($(1)_SOURCES:%.cpp=%.o))
256 $(1)_OBJS := $$(sort $$($(1)_OBJS))
258 KERN_OBJS += $$($(1)_OBJS)
259 KERN_SOURCES += $$($(1)_SOURCES)
261 $(KERN_LIB_DIR)/lib$(1).a: $$($(1)_OBJS)
262 @$(QUIET_CMD_ECHO) " AR [K] $$@"
263 $(Q) $(KERN_AR) rcs $$@ $$^
269 kernel-lib-pass-local: $(kernel_LIBRARIES:%=$(KERN_LIB_DIR)/lib%.a)
271 kernel-mod-pass-local: $(kernel_MODULES:%=$(KERN_MODULES_LINK_DIR)/%$(KERN_LINK_SUFFIX))
273 $(foreach module,$(kernel_MODULES),$(eval $(call MODULE_kern_template,$(module),$(KERN_MODULES_LINK_DIR))))
275 $(foreach lib,$(kernel_LIBRARIES),$(eval $(call LIBRARY_kern_template,$(lib))))
280 ifeq ($(CONFIG_RTLINUX),y)
282 kernel-mod-pass-local: $(rtlinux_MODULES:%=$(KERN_MODULES_LINK_DIR)/%$(KERN_LINK_SUFFIX))
284 kernel-lib-pass-local: $(rtlinux_LIBRARIES:%=$(KERN_LIB_DIR)/lib%.a)
286 $(foreach module,$(rtlinux_MODULES),$(eval $(call MODULE_kern_template,$(module),$(KERN_MODULES_LINK_DIR))))
288 $(foreach lib,$(rtlinux_LIBRARIES),$(eval $(call LIBRARY_kern_template,$(lib))))
292 ifeq ($(KERN_MODPOST_PASS),y)
294 MODULES_LIST := $(wildcard *.mod.stamp)
295 MODULES_LIST := $(MODULES_LIST:%.mod.stamp=%)
297 define MODPOST_kern_template
298 $(2) : $(1)$(KERN_LINK_SUFFIX) $(1).mod.c
299 @$(QUIET_CMD_ECHO) " LD [M] $$@"
300 $(Q) $$(c_o_kern_COMPILE) -D"KBUILD_BASENAME=$(KERN_MQ)$(1)$(KERN_MQ)" \
301 -D"KBUILD_MODNAME=$(KERN_MQ)$(1)$(KERN_MQ)" \
302 -o $(1).mod.o -c $(1).mod.c
303 $(Q) $$(KERN_LD) $$(KERN_LDFLAGS) $(1)$(KERN_LINK_SUFFIX) $(1).mod.o -r -o $$@
306 kernel-modpost-versions: $(wildcard $(LINUX_DIR)/Module.symvers)
307 @$(QUIET_CMD_ECHO) " MODPOST $(KERN_MODPOST_DIR)"
308 @echo >$(KERN_MODPOST_DIR)/modpost-running
309 @rm -f $(KERN_MODPOST_DIR)/module-changes
310 $(Q) $(KERN_MODPOST) $(MODPOST_OPTS) $(MODULES_LIST:%=%$(KERN_LINK_SUFFIX))
312 $(MODULES_LIST:%=%.mod.c) : kernel-modpost-versions
314 kernel-modpost-pass-local: $(MODULES_LIST:%=$(KERN_MODULES_DIR)/%$(KERN_EXE_SUFFIX))
315 @rm -f $(KERN_MODPOST_DIR)/modpost-running
317 $(foreach module,$(MODULES_LIST),$(eval $(call MODPOST_kern_template,$(module),$(module:%=$(KERN_MODULES_DIR)/%$(KERN_EXE_SUFFIX)))))
321 -include $(KERN_OBJS_DIR)/*.d
325 #=====================================================================
327 # Kernel requires its own set of configuration header-files
328 ifneq ($(kernel_LIBRARIES)$(rtlinux_LIBRARIES)$(kernel_MODULES)$(rtlinux_MODULES)$(kernel_HEADERS)$(rtlinux_HEADERS)$(kernel_HEADERS)$(rtlinux_HEADERS)$(nobase_kernel_HEADERS)$(nobase_rtlinux_HEADERS)$(renamed_kernel_HEADERS)$(renamed_rtlinux_HEADERS),)
329 KERN_CONFIG_HEADERS_REQUIRED = y
332 $(eval $(call omk_pass_template, kernel-lib-pass,$(KERN_OBJS_DIR),KERN_RULE_TEMPLATES=y,$(kernel_LIBRARIES)$(rtlinux_LIBRARIES)))
333 $(eval $(call omk_pass_template, kernel-mod-pass,$(KERN_OBJS_DIR),KERN_RULE_TEMPLATES=y,$(kernel_MODULES)$(rtlinux_MODULES)))
336 +@if [ -e "$(KERN_MODPOST_DIR)/module-changes" -o -e "$(KERN_MODPOST_DIR)/modpost-running" ] ; \
338 $(MAKE) --no-print-directory -C $(KERN_MODPOST_DIR) \
339 -f $(SOURCES_DIR)/Makefile KERN_RULE_TEMPLATES=y KERN_MODPOST_PASS=y $(@:%=%-local) ; \
343 @$(call mkdir_def,$(KERN_BUILD_DIR))
344 @$(call mkdir_def,$(KERN_INCLUDE_DIR))
345 @$(call mkdir_def,$(KERN_LIB_DIR))
346 @$(call mkdir_def,$(KERN_MODULES_DIR))
347 @$(call mkdir_def,$(KERN_MODPOST_DIR))
349 $(eval $(call include-pass-template,$(KERN_INCLUDE_DIR),kernel))
350 ifeq ($(CONFIG_RTLINUX),y)
351 $(eval $(call include-pass-template,$(KERN_INCLUDE_DIR),rtlinux))
354 ifdef KERN_RULE_TEMPLATES
356 KERN_SOURCES := $(sort $(KERN_SOURCES))
358 #$(warning KERN_SOURCES = $(KERN_SOURCES))
360 $(foreach src,$(filter %.c,$(KERN_SOURCES)),$(eval $(call COMPILE_c_o_kern_template,$(SOURCES_DIR)/$(src),$(src:%.c=%.o),)))
362 $(foreach src,$(filter %.cc,$(KERN_SOURCES)),$(eval $(call COMPILE_cc_o_kern_template,$(SOURCES_DIR)/$(src),$(src:%.cc=%.o),)))
364 $(foreach src,$(filter %.cxx,$(KERN_SOURCES)),$(eval $(call COMPILE_cc_o_kern_template,$(SOURCES_DIR)/$(src),$(src:%.cxx=%.o),)))
366 $(foreach src,$(filter %.cpp,$(KERN_SOURCES)),$(eval $(call COMPILE_cc_o_kern_template,$(SOURCES_DIR)/$(src),$(src:%.cpp=%.o),)))
368 $(foreach src,$(filter %.S,$(USER_SOURCES)),$(eval $(call COMPILE_S_o_kern_template,$(SOURCES_DIR)/$(src),$(src:%.S=%.o),)))
372 @echo Cleaning in $(KERN_OBJS_DIR)
373 @rm -f $(KERN_OBJS_DIR)/*.o \
374 $(KERN_OBJS_DIR)/*.d \
375 $(KERN_OBJS_DIR)/*.map \
376 $(KERN_OBJS_DIR)/*.mod.c \
377 $(kernel_MODULES:%=$(KERN_MODPOST_DIR)/%.*) \
378 $(LOCAL_CONFIG_H:%=$(KERN_OBJS_DIR)/%)
379 @if [ -e $(KERN_LIB_DIR)/kernel.mk ] ; then \
380 touch -t 200001010101 $(KERN_LIB_DIR)/kernel.mk ; \
383 ifndef OMIT_KERNEL_PASSES
384 # Also make kernel passes if not disabled
385 default: kernel-lib-pass kernel-pass