include/kernel.mk

   1 #
   2 # Copyright (C) 2006-2015 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7
   8 ifneq ($(filter check,$(MAKECMDGOALS)),)
   9 CHECK:=1
  10 DUMP:=1
  11 endif
  12
  13 ifneq ($(SOURCE_DATE_EPOCH),)
  14   ifndef DUMP
  15     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  16   endif
  17 endif
  18
  19 ifeq ($(__target_inc),)
  20   ifndef CHECK
  21     include $(INCLUDE_DIR)/target.mk
  22   endif
  23 endif
  24
  25 ifeq ($(DUMP),1)
  26   KERNEL?=<KERNEL>
  27   BOARD?=<BOARD>
  28   LINUX_VERSION?=<LINUX_VERSION>
  29   LINUX_VERMAGIC?=<LINUX_VERMAGIC>
  30 else
  31   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  32     export GCC_HONOUR_COPTS=s
  33   endif
  34
  35   LINUX_KMOD_SUFFIX=ko
  36
  37   ifneq (,$(findstring uml,$(BOARD)))
  38     KERNEL_CC?=$(HOSTCC)
  39     KERNEL_CROSS?=
  40   else
  41     KERNEL_CC?=$(TARGET_CC)
  42     KERNEL_CROSS?=$(TARGET_CROSS)
  43   endif
  44
  45   ifeq ($(TARGET_BUILD),1)
  46     PATCH_DIR ?= $(CURDIR)/patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  47     FILES_DIR ?= $(foreach dir,$(wildcard $(CURDIR)/files $(CURDIR)/files-$(KERNEL_PATCHVER)),"$(dir)")
  48   endif
  49   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
  50   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  51   LINUX_UAPI_DIR=uapi/
  52   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
  53   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
  54
  55   LINUX_UNAME_VERSION:=$(KERNEL_BASE)
  56   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  57     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  58   endif
  59
  60   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  61
  62   ifneq (,$(findstring -rc,$(LINUX_VERSION)))
  63       LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.gz
  64   else
  65       LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
  66   endif
  67
  68   ifneq (,$(findstring -rc,$(LINUX_VERSION)))
  69       LINUX_SITE:=https://git.kernel.org/torvalds/t
  70   else ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  71       LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x
  72   else
  73       LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
  74   endif
  75
  76   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  77   TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  78
  79   ifneq ($(TARGET_BUILD),1)
  80     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  81   endif
  82 endif
  83
  84 ifneq (,$(findstring uml,$(BOARD)))
  85   LINUX_KARCH=um
  86 else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
  87   LINUX_KARCH := arm64
  88 else ifneq (,$(findstring $(ARCH) , arceb ))
  89   LINUX_KARCH := arc
  90 else ifneq (,$(findstring $(ARCH) , armeb ))
  91   LINUX_KARCH := arm
  92 else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
  93   LINUX_KARCH := mips
  94 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
  95   LINUX_KARCH := powerpc
  96 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
  97   LINUX_KARCH := sh
  98 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
  99   LINUX_KARCH := x86
 100 else
 101   LINUX_KARCH := $(ARCH)
 102 endif
 103
 104 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
 105
 106 KERNEL_MAKE_FLAGS = \
 107         KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR)))" \
 108         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 109         CROSS_COMPILE="$(KERNEL_CROSS)" \
 110         ARCH="$(LINUX_KARCH)" \
 111         KBUILD_HAVE_NLS=no \
 112         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 113         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 114         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 115         KBUILD_BUILD_VERSION="0" \
 116         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 117         KBUILD_HOSTLDLIBS="-L$(STAGING_DIR_HOST)/lib" \
 118         CONFIG_SHELL="$(BASH)" \
 119         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 120         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 121         cmd_syscalls=
 122
 123 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 124   KERNEL_MAKE_FLAGS += \
 125         KERNELRELEASE=$(LINUX_VERSION)
 126 endif
 127
 128 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 129
 130 ifdef CONFIG_USE_SPARSE
 131   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 132 endif
 133
 134 ifneq ($(HOST_OS),Linux)
 135   KERNEL_MAKEOPTS += CONFIG_STACK_VALIDATION=
 136   export SKIP_STACK_VALIDATION:=1
 137 endif
 138
 139 PKG_EXTMOD_SUBDIRS ?= .
 140
 141 define populate_module_symvers
 142         @mkdir -p $(PKG_INFO_DIR)
 143         cat /dev/null > $(PKG_INFO_DIR)/$(PKG_NAME).symvers; \
 144         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 145                 cat $(PKG_INFO_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
 146         done
 147 endef
 148
 149 define collect_module_symvers
 150         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 151                 realdir=$$$$(readlink -f $(PKG_BUILD_DIR)); \
 152                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 153                 [ "$(PKG_BUILD_DIR)" = "$$$$realdir" ] || \
 154                         grep -F $$$$realdir $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 155         done; \
 156         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 157         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
 158 endef
 159
 160 define KernelPackage/hooks
 161   ifneq ($(PKG_NAME),kernel)
 162     Hooks/Compile/Pre += populate_module_symvers
 163     Hooks/Compile/Post += collect_module_symvers
 164   endif
 165   define KernelPackage/hooks
 166   endef
 167 endef
 168
 169 define KernelPackage/Defaults
 170   FILES:=
 171   AUTOLOAD:=
 172   MODPARAMS:=
 173   PKGFLAGS+=nonshared
 174 endef
 175
 176 # 1: name
 177 # 2: install prefix
 178 # 3: module priority prefix
 179 # 4: required for boot
 180 # 5: module list
 181 define ModuleAutoLoad
 182   $(if $(5), \
 183     mkdir -p $(2)/etc/modules.d; \
 184     ($(foreach mod,$(5), \
 185       echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
 186     $(if $(4), \
 187       mkdir -p $(2)/etc/modules-boot.d; \
 188       ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 189 endef
 190
 191 ifeq ($(DUMP)$(TARGET_BUILD),)
 192   -include $(LINUX_DIR)/.config
 193 endif
 194
 195 define KernelPackage/depends
 196   $(STAMP_BUILT): $(LINUX_DIR)/.config
 197   define KernelPackage/depends
 198   endef
 199 endef
 200
 201 define KernelPackage
 202   NAME:=$(1)
 203   $(eval $(call Package/Default))
 204   $(eval $(call KernelPackage/Defaults))
 205   $(eval $(call KernelPackage/$(1)))
 206   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 207   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 208
 209   define Package/kmod-$(1)
 210     TITLE:=$(TITLE)
 211     SECTION:=kernel
 212     CATEGORY:=Kernel modules
 213     DESCRIPTION:=$(DESCRIPTION)
 214     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 215     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 216     PKGFLAGS:=$(PKGFLAGS)
 217     $(call KernelPackage/$(1))
 218     $(call KernelPackage/$(1)/$(BOARD))
 219     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 220   endef
 221
 222   ifdef KernelPackage/$(1)/conffiles
 223     define Package/kmod-$(1)/conffiles
 224 $(call KernelPackage/$(1)/conffiles)
 225     endef
 226   endif
 227
 228   ifdef KernelPackage/$(1)/description
 229     define Package/kmod-$(1)/description
 230 $(call KernelPackage/$(1)/description)
 231     endef
 232   endif
 233
 234   ifdef KernelPackage/$(1)/config
 235     define Package/kmod-$(1)/config
 236 $(call KernelPackage/$(1)/config)
 237     endef
 238   endif
 239
 240   $(call KernelPackage/depends)
 241   $(call KernelPackage/hooks)
 242
 243   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 244     define Package/kmod-$(1)/install
 245                   @for mod in $$(call version_filter,$$(FILES)); do \
 246                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 247                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 248                         elif [ -e $$$$$$$$mod ]; then \
 249                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 250                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 251                         else \
 252                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 253                                 exit 1; \
 254                         fi; \
 255                   done;
 256                   $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(sort $(wordlist 3,99,$(AUTOLOAD))))
 257                   $(call KernelPackage/$(1)/install,$$(1))
 258     endef
 259   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 260     else
 261       compile: $(1)-disabled
 262       $(1)-disabled:
 263                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 264
 265       define Package/kmod-$(1)/install
 266                 true
 267       endef
 268   )
 269   endif
 270   $$(eval $$(call BuildPackage,kmod-$(1)))
 271
 272   $$(IPKG_kmod-$(1)): $$(wildcard $$(call version_filter,$$(FILES)))
 273
 274 endef
 275
 276 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 277
 278 # 1: priority (optional)
 279 # 2: module list
 280 # 3: boot flag
 281 define AutoLoad
 282   $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 283 endef
 284
 285 # 1: module list
 286 # 2: boot flag
 287 define AutoProbe
 288   $(call AutoLoad,,$(1),$(2))
 289 endef
 290
 291 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 292 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 293
 294 ifdef DUMP
 295   kernel_version_cmp=
 296 else
 297   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 298 endif
 299
 300 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 301
 302 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 303 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 304 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 305 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 306 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 307