# Copyright (C) 2015 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

LOCAL_PATH := $(call my-dir)


# Common variables.
# ========================================================
libminijailSrcFiles := \
	bpf.c \
	libminijail.c \
	signal_handler.c \
	syscall_filter.c \
	util.c

minijailCommonCFlags := -Wall -Werror
minijailCommonLibraries := libcap


# Static library for generated code.
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := libminijail_generated

LOCAL_MODULE_CLASS := STATIC_LIBRARIES
generated_sources_dir := $(local-generated-sources-dir)

$(generated_sources_dir)/libsyscalls.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_ARCH)" $@
$(generated_sources_dir)/libsyscalls.c: $(LOCAL_PATH)/gen_syscalls.sh
	$(transform-generated-source)
LOCAL_GENERATED_SOURCES_$(TARGET_ARCH) += $(generated_sources_dir)/libsyscalls.c

$(generated_sources_dir)/libconstants.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_ARCH)" $@
$(generated_sources_dir)/libconstants.c: $(LOCAL_PATH)/gen_constants.sh
	$(transform-generated-source)
LOCAL_GENERATED_SOURCES_$(TARGET_ARCH) += $(generated_sources_dir)/libconstants.c

# For processes running in 32-bit compat mode on 64-bit processors.
ifdef TARGET_2ND_ARCH
$(generated_sources_dir)/libsyscalls.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_2ND_ARCH)" $@
$(generated_sources_dir)/libsyscalls.c: $(LOCAL_PATH)/gen_syscalls.sh
	$(transform-generated-source)
LOCAL_GENERATED_SOURCES_$(TARGET_2ND_ARCH) += $(generated_sources_dir)/libsyscalls.c

$(generated_sources_dir)/libconstants.c: PRIVATE_CUSTOM_TOOL = $< "$(lastword $(CLANG)) -isystem bionic/libc/kernel/uapi/asm-$(TARGET_2ND_ARCH)" $@
$(generated_sources_dir)/libconstants.c: $(LOCAL_PATH)/gen_constants.sh
	$(transform-generated-source)
LOCAL_GENERATED_SOURCES_$(TARGET_2ND_ARCH) += $(generated_sources_dir)/libconstants.c
endif

LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
include $(BUILD_STATIC_LIBRARY)


# libminijail shared library for target.
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := libminijail

LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
LOCAL_SRC_FILES := $(libminijailSrcFiles)

LOCAL_STATIC_LIBRARIES := libminijail_generated
LOCAL_SHARED_LIBRARIES := $(minijailCommonLibraries)
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
include $(BUILD_SHARED_LIBRARY)


# libminijail static library for target.
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := libminijail

LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
LOCAL_SRC_FILES := $(libminijailSrcFiles)

LOCAL_STATIC_LIBRARIES := libminijail_generated $(minijailCommonLibraries)
LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
include $(BUILD_STATIC_LIBRARY)


# libminijail native unit tests. Run with:
# adb shell /data/nativetest/libminijail_unittest/libminijail_unittest
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := libminijail_unittest
ifdef BRILLO
  LOCAL_MODULE_TAGS := debug
endif

LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
LOCAL_SRC_FILES := \
	bpf.c \
	libminijail.c \
	libminijail_unittest.c \
	signal_handler.c \
	syscall_filter.c \
	util.c \

LOCAL_STATIC_LIBRARIES := libminijail_generated
LOCAL_SHARED_LIBRARIES := $(minijailCommonLibraries)
include $(BUILD_NATIVE_TEST)


# Syscall filtering native unit tests. Run with:
# adb shell /data/nativetest/syscall_filter_unittest/syscall_filter_unittest
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := syscall_filter_unittest
ifdef BRILLO
  LOCAL_MODULE_TAGS := debug
endif

LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
LOCAL_SRC_FILES := \
	bpf.c \
	syscall_filter.c \
	syscall_filter_unittest.c \
	util.c \

LOCAL_STATIC_LIBRARIES := libminijail_generated
LOCAL_SHARED_LIBRARIES := $(minijailCommonLibraries)
include $(BUILD_NATIVE_TEST)


# libminijail usage example.
# ========================================================
include $(CLEAR_VARS)
LOCAL_MODULE := drop_privs
LOCAL_MODULE_TAGS := optional
LOCAL_CFLAGS := $(minijailCommonCFlags)
LOCAL_CLANG := true
LOCAL_SRC_FILES := \
	examples/drop_privs.cpp

LOCAL_SHARED_LIBRARIES := libbase libminijail
include $(BUILD_EXECUTABLE)