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# PLATFORM_SEPOLICY_VERSION is a number of the form "NN.m" with "NN" mapping to
# PLATFORM_SDK_VERSION and "m" as a minor number which allows for SELinux
# changes independent of PLATFORM_SDK_VERSION. This value will be set to
# 10000.0 to represent tip-of-tree development that is inherently unstable and
# thus designed not to work with any shipping vendor policy. This is similar in
# spirit to how DEFAULT_APP_TARGET_SDK is set.
# The minor version ('m' component) must be updated every time a platform release
# is made which breaks compatibility with the previous platform sepolicy version,
# not just on every increase in PLATFORM_SDK_VERSION. The minor version should
# be reset to 0 on every bump of the PLATFORM_SDK_VERSION.
sepolicy_minor_vers := 0
ifneq ($(sepolicy_major_vers), $(PLATFORM_SDK_VERSION))
$(error sepolicy_major_version does not match PLATFORM_SDK_VERSION, please update.)
endif
ifneq (REL,$(PLATFORM_VERSION_CODENAME))
sepolicy_major_vers := 10000
sepolicy_minor_vers := 0
endif
PLATFORM_SEPOLICY_VERSION := $(join $(addsuffix .,$(sepolicy_major_vers)), $(sepolicy_minor_vers))
sepolicy_major_vers :=
sepolicy_minor_vers :=
# Must be <= /sys/fs/selinux/policyvers reported by the Android kernel.
# Must be within the compatibility range reported by checkpolicy -V.
ifdef BOARD_SEPOLICY_REPLACE
$(error BOARD_SEPOLICY_REPLACE is no longer supported; please remove from your BoardConfig.mk or other .mk file.)
endif
ifdef BOARD_SEPOLICY_IGNORE
$(error BOARD_SEPOLICY_IGNORE is no longer supported; please remove from your BoardConfig.mk or other .mk file.)
endif
ifdef BOARD_SEPOLICY_UNION
$(warning BOARD_SEPOLICY_UNION is no longer required - all files found in BOARD_SEPOLICY_DIRS are implicitly unioned; please remove from your BoardConfig.mk or other .mk file.)
endif
ifdef BOARD_SEPOLICY_M4DEFS
LOCAL_ADDITIONAL_M4DEFS := $(addprefix -D, $(BOARD_SEPOLICY_M4DEFS))
endif
# sepolicy is now divided into multiple portions:
# public - policy exported on which non-platform policy developers may write
# additional policy. types and attributes are versioned and included in
# delivered non-platform policy, which is to be combined with platform policy.
# private - platform-only policy required for platform functionality but which
# is not exported to vendor policy developers and as such may not be assumed
# to exist.
# vendor - vendor-only policy required for vendor functionality. This policy can
# reference the public policy but cannot reference the private policy. This
# policy is for components which are produced from the core/non-vendor tree and
# placed into a vendor partition.
# mapping - This contains policy statements which map the attributes
# exposed in the public policy of previous versions to the concrete types used
# in this policy to ensure that policy targeting attributes from public
# policy from an older platform version continues to work.
# build process for device:
# 1) convert policies to CIL:
# - private + public platform policy to CIL
# - mapping file to CIL (should already be in CIL form)
# - non-platform public policy to CIL
# - non-platform public + private policy to CIL
# 2) attributize policy
# - run script which takes non-platform public and non-platform combined
# private + public policy and produces attributized and versioned
# non-platform policy
# 3) combine policy files
# - combine mapping, platform and non-platform policy.
# - compile output binary policy file
PLAT_PUBLIC_POLICY := $(LOCAL_PATH)/public
PLAT_PRIVATE_POLICY := $(LOCAL_PATH)/private
PLAT_VENDOR_POLICY := $(LOCAL_PATH)/vendor
REQD_MASK_POLICY := $(LOCAL_PATH)/reqd_mask
# TODO: move to README when doing the README update and finalizing versioning.
# BOARD_SEPOLICY_VERS must take the format "NN.m" and contain the sepolicy
# version identifier corresponding to the sepolicy on which the non-platform
# policy is to be based. If unspecified, this will build against the current
# public platform policy in tree
ifndef BOARD_SEPOLICY_VERS
$(warning BOARD_SEPOLICY_VERS not specified, assuming current platform version)
# The default platform policy version.
BOARD_SEPOLICY_VERS := $(PLATFORM_SEPOLICY_VERSION)
platform_mapping_file := $(BOARD_SEPOLICY_VERS).cil
###########################################################
# Compute policy files to be used in policy build.
# $(1): files to include
# $(2): directories in which to find files
###########################################################
define build_policy
$(foreach type, $(1), $(foreach file, $(addsuffix /$(type), $(2)), $(sort $(wildcard $(file)))))
endef
# Builds paths for all policy files found in BOARD_SEPOLICY_DIRS.
# $(1): the set of policy name paths to build
build_device_policy = $(call build_policy, $(1), $(PLAT_VENDOR_POLICY) $(BOARD_SEPOLICY_DIRS))
# Add a file containing only a newline in-between each policy configuration
# 'contexts' file. This will allow OEM policy configuration files without a
# final newline (0x0A) to be built correctly by the m4(1) macro processor.
# $(1): the set of contexts file names.
# $(2): the file containing only 0x0A.
add_nl = $(foreach entry, $(1), $(subst $(entry), $(entry) $(2), $(entry)))
sepolicy_build_files := security_classes \
initial_sids \
access_vectors \
global_macros \
mls_decl \
mls \
policy_capabilities \
te_macros \
attributes \
roles_decl \
roles \
users \
initial_sid_contexts \
fs_use \
genfs_contexts \
port_contexts
# CIL files which contain workarounds for current limitation of human-readable
# module policy language. These files are appended to the CIL files produced
# from module language files.
sepolicy_build_cil_workaround_files := technical_debt.cil
my_target_arch := $(TARGET_ARCH)
ifneq (,$(filter mips mips64,$(TARGET_ARCH)))
my_target_arch := mips
endif
intermediates := $(TARGET_OUT_INTERMEDIATES)/ETC/sepolicy_intermediates
with_asan := false
ifneq (,$(filter address,$(SANITIZE_TARGET)))
with_asan := true
endif
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include $(CLEAR_VARS)
LOCAL_MODULE := selinux_policy
LOCAL_MODULE_TAGS := optional
# Include SELinux policy. We do this here because different modules
# need to be included based on the value of PRODUCT_FULL_TREBLE. This
# type of conditional inclusion cannot be done in top-level files such
# as build/target/product/embedded.mk.
# This conditional inclusion closely mimics the conditional logic
# inside init/init.cpp for loading SELinux policy from files.
ifeq ($(PRODUCT_FULL_TREBLE),true)
# Use split SELinux policy
LOCAL_REQUIRED_MODULES += \
$(platform_mapping_file) \
nonplat_sepolicy.cil \
plat_sepolicy.cil \
plat_and_mapping_sepolicy.cil.sha256 \
secilc \
nonplat_file_contexts \
plat_file_contexts \
plat_sepolicy_vers.txt
# Include precompiled policy, unless told otherwise
ifneq ($(PRODUCT_PRECOMPILED_SEPOLICY),false)
LOCAL_REQUIRED_MODULES += precompiled_sepolicy precompiled_sepolicy.plat_and_mapping.sha256
endif
else
# Use monolithic SELinux policy
LOCAL_REQUIRED_MODULES += sepolicy \
file_contexts.bin
endif
include $(BUILD_PHONY_PACKAGE)
# reqd_policy_mask - a policy.conf file which contains only the bare minimum
# policy necessary to use checkpolicy. This bare-minimum policy needs to be
# present in all policy.conf files, but should not necessarily be exported as
# part of the public policy. The rules generated by reqd_policy_mask will allow
# the compilation of public policy and subsequent removal of CIL policy that
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