# Copyright (c) 2022-2022 Huawei Technologies Co., Ltd. All rights reserved.
#
# UniProton is licensed under Mulan PSL v2.
# You can use this software according to the terms and conditions of the Mulan PSL v2.
# You may obtain a copy of Mulan PSL v2 at:
#          http://license.coscl.org.cn/MulanPSL2
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
# See the Mulan PSL v2 for more details.
# Create: 2022-09-21
# Description: UniProton内核编译脚本。
import("//build/lite/config/component/lite_component.gni")
import("//build/ohos.gni")
import("//third_party/littlefs/littlefs.gni")
import("//third_party/lwip/lwip.gni")
import("uniproton.gni")

declare_args() {
  uniproton_name = "OHOS_Image"
  HAVE_DEVICE_SDK = true
}

arch_cflags = []
cc = "$ohos_current_cc_command " + string_join(" ", arch_cflags)

config("arch_config") {
  cflags = arch_cflags
  ldflags = cflags
  asmflags = cflags
}

config("kconfig_config") {
  cflags = [
    "-imacros",
    "$MENUCONFIG_H",
  ]
  asmflags = cflags
  cflags_cc = cflags
}

config("kernel_config") {
  include_dirs = [
    "$OSTOPDIR/include/uapi",
    "//third_party/bounds_checking_function/include",
  ]
  if (defined(OS_ARCH_ARMV7_M)) {
    include_dirs += ARCH_ARMVM7_M_INCLUDE_DIRS
  }
}

config("strong_waring_flag") {
  base_flags = [
    "-Wunused",
    "-Wredundant-decls",
    "-Wfloat-conversion",
    "-Wwrite-strings",
    "-Wunused-macros",
    "-Wswitch-default",
    "-Wshift-overflow=2",
    "-Wmissing-include-dirs",
    "-Wlogical-op",
    "-Wformat-security",
    "-Wvla",
    "-Wframe-larger-than=4096",
    "-Wduplicated-cond",
    "-Wdisabled-optimization",
    "-Wduplicated-branches",
    "-Wignored-qualifiers",
    "-Wimplicit-fallthrough=3",
    "-Wpointer-arith",
    "-Wshift-negative-value",
    "-Wsign-compare",
    "-Wtype-limits",
    "-Wcast-qual",
    "-Wundef",
    "-Wpacked",
    "-Wstack-usage=2048",
  ]

  cflags = base_flags
  cflags += [
    "-Wnested-externs",
    "-Wjump-misses-init",
    "-Wbad-function-cast",
    "-Wold-style-definition",
    "-Wstrict-prototypes",
  ]
  cflags_cc = base_flags
}

config("warn_config") {
  cflags = [
    "-Wall",
    "-Werror",
    "-Wextra",
    "-Wformat=2",
    "-Wfloat-equal",
    "-Wshadow",
    "-Wtrampolines",
    "-Wdate-time",
  ]

  cflags_cc = cflags
}

config("stdinc_config") {
  std_include = exec_script("//build/lite/run_shell_cmd.py",
                            [ "$cc -print-file-name=include" ],
                            "trim string")
  cflags = [
    "-isystem",
    std_include,
  ]
  asmflags = cflags
}

config("ssp_config") {
  cflags = []
  if (defined(CC_STACKPROTECTOR_ALL)) {
    cflags += [ "-fstack-protector-all" ]
  } else if (defined(CC_STACKPROTECTOR_STRONG)) {
    cflags += [ "-fstack-protector-strong" ]
  } else if (defined(CC_STACKPROTECTOR)) {
    cflags += [
      "-fstack-protector",
      "--param",
      "ssp-buffer-size=4",
    ]
  } else {
    cflags += [ "-fno-stack-protector" ]
  }
  asmflags = cflags
}

config("misc_config") {
  cflags = [
    "-fno-pic",
    "-fno-builtin",
    "-fms-extensions",
    "-fno-strict-aliasing",
    "-fno-common",
    "-fsigned-char",
    "-ffunction-sections",
    "-fdata-sections",
    "-fno-exceptions",
    "-fno-omit-frame-pointer",
  ]

  asmflags = cflags
  asmflags += [ "-DCLZ=CLZ" ]
}

config("os_config") {
  configs = [
    ":arch_config",
    ":stdinc_config",
    ":ssp_config",

    #":warn_config",
    #":strong_waring_flag",
    ":misc_config",
  ]

  configs += [ ":kernel_config" ]
  if (HAVE_DEVICE_SDK) {
    configs += [ "$device_path:public" ]
  }
}

config("public") {
  include_dirs = [
    "//kernel/uniproton/src/arch/include",
    "//kernel/uniproton/src/core/kernel/include",
  ]
}

ohos_static_library("notice") {
  license_file = "./NOTICE"
}

static_library("libkernel") {
  include_dirs = KERNEL_BASE_INCLUDE_DIRS
  sources = KERNEL_BASE_SOURCES

  if (defined(OS_OPTION_EVENT)) {
    sources += KERNEL_IPC_EVENT_SOURCES
  }
  if (defined(OS_OPTION_QUEUE)) {
    sources += KERNEL_IPC_QUEUE_SOURCES
  }
  if (defined(INTERNAL_OS_SWTMR)) {
    sources += KERNEL_SWTMR_SOURCES
  }
  sources += KERNEL_IPC_SEM_SOURCES
  sources += KERNEL_MEM_SOURCES
  sources += KERNEL_OM_SOURCES
  if (defined(OS_OPTION_CPUP)) {
    sources += KERNEL_OM_CPUP_SOURCES
  }
  sources += KERNEL_SECURITY_SOURCES
  sources += KERNEL_UTILITY_SOURCES

  if (defined(OS_SUPPORT_FS)) {
    sources += KERNEL_FS_SOURCES + LITTLEFS_SRC_FILES_FOR_KERNEL_MODULE
    include_dirs += KERNEL_FS_INCLUDE_DIRS + LITTLEFS_INCLUDE_DIRS
  }

  if (defined(OS_SUPPORT_NET)) {
    sources += KERNEL_LWIP_SOURCES + LWIPNOAPPSFILES
    include_dirs += KERNEL_LWIP_INCLUDE_DIRS + LWIP_INCLUDE_DIRS
  }

  if (defined(OS_ARCH_ARMV7_M)) {
    sources += ARCH_ARMVM7_M_SOURCES
    if ("$board_cpu" == "cortex-m4") {
      sources += ARCH_CORTEX_M4_SOURCES
      include_dirs += ARCH_CORTEX_M4_INCLUDE_DIRS
    }
  }

  configs += [ ":os_config" ]

  deps = [ "//third_party/bounds_checking_function:libsec_static" ]
  deps += [ "//third_party/musl/porting/uniproton/kernel:kernel" ]
  if (defined(DRIVERS_HDF)) {
    deps += [ HDFTOPDIR ]
  }
}

group("kernel") {
  deps = [
    ":libkernel",
    ":notice",
  ]
}

executable("uniproton") {
  configs += [ ":os_config" ]

  ldflags = [
    "-static",
    "-Wl,--gc-sections",
    "-Wl,-Map=$uniproton_name.map",
  ]

  output_dir = target_out_dir

  deps = [ "//build/lite:ohos" ]

  if (HAVE_DEVICE_SDK) {
    deps += [
      "$device_path:device",
      "$product_path:$product",
    ]
  }
}

copy("copy_image") {
  deps = [ ":uniproton" ]
  sources = [ "$target_out_dir/unstripped/bin/uniproton" ]
  outputs = [ "$root_out_dir/$uniproton_name" ]
}

build_ext_component("build_kernel_image") {
  deps = [ ":copy_image" ]
  exec_path = rebase_path(root_out_dir)

  objcopy = "${compile_prefix}objcopy$toolchain_cmd_suffix"
  objdump = "${compile_prefix}objdump$toolchain_cmd_suffix"

  command = "$objcopy -O binary $uniproton_name $uniproton_name.bin"
  command += " && sh -c '$objdump -t $uniproton_name | sort >$uniproton_name.sym.sorted'"
  command += " && sh -c '$objdump -d $uniproton_name >$uniproton_name.asm'"
}