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) $(KERNEL_MAKEOPTS)
 105
 106 KERNEL_MAKE_FLAGS = \
 107         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 108         CROSS_COMPILE="$(KERNEL_CROSS)" \
 109         ARCH="$(LINUX_KARCH)" \
 110         KBUILD_HAVE_NLS=no \
 111         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 112         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 113         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 114         KBUILD_BUILD_VERSION="0" \
 115         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 116         CONFIG_SHELL="$(BASH)" \
 117         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 118         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 119         cmd_syscalls=
 120
 121 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 122   KERNEL_MAKE_FLAGS += \
 123         KERNELRELEASE=$(LINUX_VERSION)
 124 endif
 125
 126 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 127
 128 ifdef CONFIG_USE_SPARSE
 129   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 130 endif
 131
 132 ifeq ($(HOST_OS),Darwin)
 133   export SKIP_STACK_VALIDATION:=1
 134 endif
 135
 136 PKG_EXTMOD_SUBDIRS ?= .
 137
 138 define populate_module_symvers
 139         @mkdir -p $(PKG_INFO_DIR)
 140         cat /dev/null > $(PKG_INFO_DIR)/$(PKG_NAME).symvers; \
 141         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 142                 cat $(PKG_INFO_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
 143         done
 144 endef
 145
 146 define collect_module_symvers
 147         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 148                 realdir=$$$$(readlink -f $(PKG_BUILD_DIR)); \
 149                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 150                 [ "$(PKG_BUILD_DIR)" = "$$$$realdir" ] || \
 151                         grep -F $$$$realdir $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 152         done; \
 153         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 154         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
 155 endef
 156
 157 define KernelPackage/hooks
 158   ifneq ($(PKG_NAME),kernel)
 159     Hooks/Compile/Pre += populate_module_symvers
 160     Hooks/Compile/Post += collect_module_symvers
 161   endif
 162   define KernelPackage/hooks
 163   endef
 164 endef
 165
 166 define KernelPackage/Defaults
 167   FILES:=
 168   AUTOLOAD:=
 169   MODPARAMS:=
 170   PKGFLAGS+=nonshared
 171 endef
 172
 173 # 1: name
 174 # 2: install prefix
 175 # 3: module priority prefix
 176 # 4: required for boot
 177 # 5: module list
 178 define ModuleAutoLoad
 179   $(if $(5), \
 180     mkdir -p $(2)/etc/modules.d; \
 181     ($(foreach mod,$(5), \
 182       echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
 183     $(if $(4), \
 184       mkdir -p $(2)/etc/modules-boot.d; \
 185       ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
 186 endef
 187
 188 ifeq ($(DUMP)$(TARGET_BUILD),)
 189   -include $(LINUX_DIR)/.config
 190 endif
 191
 192 define KernelPackage/depends
 193   $(STAMP_BUILT): $(LINUX_DIR)/.config
 194   define KernelPackage/depends
 195   endef
 196 endef
 197
 198 define KernelPackage
 199   NAME:=$(1)
 200   $(eval $(call Package/Default))
 201   $(eval $(call KernelPackage/Defaults))
 202   $(eval $(call KernelPackage/$(1)))
 203   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 204   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 205
 206   define Package/kmod-$(1)
 207     TITLE:=$(TITLE)
 208     SECTION:=kernel
 209     CATEGORY:=Kernel modules
 210     DESCRIPTION:=$(DESCRIPTION)
 211     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 212     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 213     PKGFLAGS:=$(PKGFLAGS)
 214     $(call KernelPackage/$(1))
 215     $(call KernelPackage/$(1)/$(BOARD))
 216     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 217   endef
 218
 219   ifdef KernelPackage/$(1)/conffiles
 220     define Package/kmod-$(1)/conffiles
 221 $(call KernelPackage/$(1)/conffiles)
 222     endef
 223   endif
 224
 225   ifdef KernelPackage/$(1)/description
 226     define Package/kmod-$(1)/description
 227 $(call KernelPackage/$(1)/description)
 228     endef
 229   endif
 230
 231   ifdef KernelPackage/$(1)/config
 232     define Package/kmod-$(1)/config
 233 $(call KernelPackage/$(1)/config)
 234     endef
 235   endif
 236
 237   $(call KernelPackage/depends)
 238   $(call KernelPackage/hooks)
 239
 240   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 241     define Package/kmod-$(1)/install
 242                   @for mod in $$(call version_filter,$$(FILES)); do \
 243                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 244                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 245                         elif [ -e $$$$$$$$mod ]; then \
 246                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 247                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 248                         else \
 249                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 250                                 exit 1; \
 251                         fi; \
 252                   done;
 253                   $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(sort $(wordlist 3,99,$(AUTOLOAD))))
 254                   $(call KernelPackage/$(1)/install,$$(1))
 255     endef
 256   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 257     else
 258       compile: $(1)-disabled
 259       $(1)-disabled:
 260                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 261
 262       define Package/kmod-$(1)/install
 263                 true
 264       endef
 265   )
 266   endif
 267   $$(eval $$(call BuildPackage,kmod-$(1)))
 268
 269   $$(IPKG_kmod-$(1)): $$(wildcard $$(call version_filter,$$(FILES)))
 270
 271 endef
 272
 273 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 274
 275 # 1: priority (optional)
 276 # 2: module list
 277 # 3: boot flag
 278 define AutoLoad
 279   $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
 280 endef
 281
 282 # 1: module list
 283 # 2: boot flag
 284 define AutoProbe
 285   $(call AutoLoad,,$(1),$(2))
 286 endef
 287
 288 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 289 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 290
 291 ifdef DUMP
 292   kernel_version_cmp=
 293 else
 294   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 295 endif
 296
 297 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 298
 299 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 300 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 301 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 302 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 303 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 304