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CMakeLists.txt
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CMakeLists.txt
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if(NOT DEFINED ZEPHYR_BINARY_DIR)
message(FATAL_ERROR "A user error has occured.
cmake was invoked with '${CMAKE_CURRENT_LIST_DIR}' specified as the source directory,
but it must be invoked with an application source directory,
such as '${CMAKE_CURRENT_LIST_DIR}/samples/hello_world'.
Debug variables:
CMAKE_CACHEFILE_DIR: ${CMAKE_CACHEFILE_DIR}
")
endif()
project(Zephyr-Kernel VERSION ${PROJECT_VERSION})
enable_language(C CXX ASM)
# *DOCUMENTATION*
#
# Note that this is *NOT* the top-level CMakeLists.txt. That's in the
# application. See the Application Development Primer documentation
# for details.
#
# To see a list of typical targets execute "make usage"
# More info can be located in ./README.rst
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
# Verify that the toolchain can compile a dummy file, if it is not we
# won't be able to test for compatiblity with certain C flags.
check_c_compiler_flag("" toolchain_is_ok)
assert(toolchain_is_ok "The toolchain is unable to build a dummy C file. See CMakeError.log.")
set(CMAKE_EXECUTABLE_SUFFIX .elf)
if(NOT PROPERTY_LINKER_SCRIPT_DEFINES)
set_property(GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES -D__GCC_LINKER_CMD__)
endif()
define_property(GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT BRIEF_DOCS " " FULL_DOCS " ")
set_property( GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT elf32-little${ARCH})
# zephyr_interface is a source-less library that has all the global
# compiler options needed by all source files. All zephyr libraries,
# including the library named "zephyr" link with this library to
# obtain these flags.
add_library(zephyr_interface INTERFACE)
# zephyr is a catchall CMake library for source files that can be
# built purely with the include paths, defines, and other compiler
# flags that come with zephyr_interface.
zephyr_library_named(zephyr)
zephyr_include_directories(
kernel/include
arch/${ARCH}/include
${SOC_DIR}/${ARCH}/${SOC_PATH}
${SOC_DIR}/${ARCH}/${SOC_PATH}/include
${SOC_DIR}/${ARCH}/${SOC_FAMILY}/include
include
include/drivers
${PROJECT_BINARY_DIR}/include/generated
${USERINCLUDE}
${STDINCLUDE}
)
zephyr_compile_definitions(
KERNEL
__ZEPHYR__=1
)
if(NOT CONFIG_NO_OPTIMIZATIONS)
zephyr_compile_definitions(
_FORTIFY_SOURCE=2
)
endif()
if(BUILD_VERSION)
zephyr_compile_definitions(
BUILD_VERSION=${BUILD_VERSION}
)
endif()
# We need to set an optimization level.
# Default to -Os
# unless CONFIG_NO_OPTIMIZATIONS is set, then it is -O0
# or unless CONFIG_DEBUG is set, then it is -Og
#
# also, some toolchain's break with -Os, and some toolchain's break
# with -Og so allow them to override what flag to use
#
# Finally, the user can use Kconfig to add compiler options that will
# come after these options and override them
set_ifndef(OPTIMIZE_FOR_NO_OPTIMIZATIONS_FLAG "-O0")
set_ifndef(OPTIMIZE_FOR_DEBUG_FLAG "-Og")
set_ifndef(OPTIMIZE_FOR_SIZE_FLAG "-Os")
set_ifndef(OPTIMIZE_FOR_SPEED_FLAG "-O2")
if(CONFIG_NO_OPTIMIZATIONS)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_NO_OPTIMIZATIONS_FLAG})
elseif(CONFIG_DEBUG_OPTIMIZATIONS)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_DEBUG_FLAG})
elseif(CONFIG_SPEED_OPTIMIZATIONS)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_SPEED_FLAG})
elseif(CONFIG_SIZE_OPTIMIZATIONS)
set(OPTIMIZATION_FLAG ${OPTIMIZE_FOR_SIZE_FLAG}) # Default
else()
assert(0 "Unreachable code. Expected optimization level to have been chosen. See misc/Kconfig.")
endif()
# Dialects of C++, corresponding to the multiple published ISO standards.
# Which standard it implements can be selected using the -std= command-line option.
set_ifndef(DIALECT_STD_CPP98 "c++98")
set_ifndef(DIALECT_STD_CPP11 "c++11")
set_ifndef(DIALECT_STD_CPP14 "c++14")
set_ifndef(DIALECT_STD_CPP17 "c++17")
set_ifndef(DIALECT_STD_CPP2A "c++2a")
if(CONFIG_STD_CPP98)
set(STD_CPP_DIALECT ${DIALECT_STD_CPP98})
elseif(CONFIG_STD_CPP11)
set(STD_CPP_DIALECT ${DIALECT_STD_CPP11}) # Default
elseif(CONFIG_STD_CPP14)
set(STD_CPP_DIALECT ${DIALECT_STD_CPP14})
elseif(CONFIG_STD_CPP17)
set(STD_CPP_DIALECT ${DIALECT_STD_CPP17})
elseif(CONFIG_STD_CPP2A)
set(STD_CPP_DIALECT ${DIALECT_STD_CPP2A})
else()
assert(0 "Unreachable code. Expected C++ standard to have been chosen. See misc/Kconfig.")
endif()
zephyr_compile_options(
${OPTIMIZATION_FLAG} # Usually -Os
-g # TODO: build configuration enough?
-Wall
-Wformat
-Wformat-security
-Wno-format-zero-length
-imacros ${AUTOCONF_H}
-ffreestanding
-Wno-main
${NOSTDINC_F}
${TOOLCHAIN_C_FLAGS}
)
zephyr_compile_options(
$<$<COMPILE_LANGUAGE:CXX>:-std=${STD_CPP_DIALECT}>
$<$<COMPILE_LANGUAGE:CXX>:-fcheck-new>
$<$<COMPILE_LANGUAGE:CXX>:-ffunction-sections>
$<$<COMPILE_LANGUAGE:CXX>:-fdata-sections>
$<$<COMPILE_LANGUAGE:ASM>:-xassembler-with-cpp>
$<$<COMPILE_LANGUAGE:ASM>:-D_ASMLANGUAGE>
)
if(NOT CONFIG_RTTI)
zephyr_compile_options(
$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>
)
endif()
if(NOT CONFIG_EXCEPTIONS)
zephyr_compile_options(
$<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
)
endif()
if(NOT CONFIG_NATIVE_APPLICATION)
zephyr_ld_options(
-nostdlib
-static
-no-pie
)
endif()
if(CONFIG_LIB_CPLUSPLUS)
zephyr_ld_options(
-lstdc++
)
endif()
# ==========================================================================
#
# cmake -DW=... settings
#
# W=1 - warnings that may be relevant and does not occur too often
# W=2 - warnings that occur quite often but may still be relevant
# W=3 - the more obscure warnings, can most likely be ignored
# ==========================================================================
if(W MATCHES "1")
zephyr_compile_options(
-Wextra
-Wunused
-Wno-unused-parameter
-Wmissing-declarations
-Wmissing-format-attribute
-Wold-style-definition
)
zephyr_cc_option(
-Wmissing-prototypes
-Wmissing-include-dirs
-Wunused-but-set-variable
-Wno-missing-field-initializers
)
endif()
if(W MATCHES "2")
zephyr_compile_options(
-Waggregate-return
-Wcast-align
-Wdisabled-optimization
-Wnested-externs
-Wshadow
)
zephyr_cc_option(
-Wlogical-op
-Wmissing-field-initializers
)
endif()
if(W MATCHES "3")
zephyr_compile_options(
-Wbad-function-cast
-Wcast-qual
-Wconversion
-Wpacked
-Wpadded
-Wpointer-arith
-Wredundant-decls
-Wswitch-default
)
zephyr_cc_option(
-Wpacked-bitfield-compat
-Wvla
)
endif()
# Allow the user to inject options when calling cmake, e.g.
# 'cmake -DEXTRA_CFLAGS="-Werror -Wno-deprecated-declarations" ..'
include(cmake/extra_flags.cmake)
if(CONFIG_READABLE_ASM)
zephyr_cc_option(-fno-reorder-blocks)
zephyr_cc_option(-fno-ipa-cp-clone)
zephyr_cc_option(-fno-partial-inlining)
endif()
zephyr_cc_option(-fno-asynchronous-unwind-tables)
zephyr_cc_option(-fno-pie)
zephyr_cc_option(-fno-pic)
zephyr_cc_option(-fno-strict-overflow)
zephyr_cc_option(-Wno-pointer-sign)
zephyr_compile_options_ifdef(CONFIG_STACK_CANARIES -fstack-protector-all)
if(CONFIG_OVERRIDE_FRAME_POINTER_DEFAULT)
if(CONFIG_OMIT_FRAME_POINTER)
zephyr_cc_option(-fomit-frame-pointer)
else()
zephyr_cc_option(-fno-omit-frame-pointer)
endif()
endif()
separate_arguments(CONFIG_COMPILER_OPT_AS_LIST UNIX_COMMAND ${CONFIG_COMPILER_OPT})
zephyr_compile_options(${CONFIG_COMPILER_OPT_AS_LIST})
# TODO: Include arch compiler options at this point.
if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
zephyr_cc_option(
#FIXME: need to fix all of those
-Wno-sometimes-uninitialized
-Wno-shift-overflow
-Wno-missing-braces
-Wno-self-assign
-Wno-address-of-packed-member
-Wno-unused-function
-Wno-initializer-overrides
-Wno-section
-Wno-unknown-warning-option
-Wno-unused-variable
-Wno-format-invalid-specifier
-Wno-gnu
# comparison of unsigned expression < 0 is always false
-Wno-tautological-compare
)
else() # GCC assumed
zephyr_cc_option(
-Wno-unused-but-set-variable
-fno-reorder-functions
)
if(NOT ${ZEPHYR_TOOLCHAIN_VARIANT} STREQUAL "xcc")
zephyr_cc_option(-fno-defer-pop)
endif()
endif()
zephyr_cc_option_ifdef(CONFIG_STACK_USAGE -fstack-usage)
zephyr_system_include_directories(${NOSTDINC})
# Force an error when things like SYS_INIT(foo, ...) occur with a missing header.
zephyr_cc_option(-Werror=implicit-int)
# Prohibit void pointer arithmetic. Illegal in C99
zephyr_cc_option(-Wpointer-arith)
# Prohibit date/time macros, which would make the build non-deterministic
# cc-option(-Werror=date-time)
# TODO: Archiver arguments
# ar_option(D)
set_ifndef(LINKERFLAGPREFIX -Wl)
if(NOT CONFIG_NATIVE_APPLICATION)
zephyr_ld_options(
${LINKERFLAGPREFIX},-X
${LINKERFLAGPREFIX},-N
)
endif()
zephyr_ld_options(
${LINKERFLAGPREFIX},--gc-sections
${LINKERFLAGPREFIX},--build-id=none
)
if(NOT CONFIG_NATIVE_APPLICATION)
# Funny thing is if this is set to =error, some architectures will
# skip this flag even though the compiler flag check passes
# (e.g. ARC and Xtensa). So warning should be the default for now.
#
# Skip this for native application as Zephyr only provides
# additions to the host toolchain linker script. The relocation
# sections (.rel*) requires us to override those provided
# by host toolchain. As we can't account for all possible
# combination of compiler and linker on all machines used
# for development, it is better to turn this off.
#
# CONFIG_LINKER_ORPHAN_SECTION_PLACE is to place the orphan sections
# without any warnings or errors, which is the default behavior.
# So there is no need to explicity set a linker flag.
if(CONFIG_LINKER_ORPHAN_SECTION_WARN)
zephyr_ld_options(
${LINKERFLAGPREFIX},--orphan-handling=warn
)
elseif(CONFIG_LINKER_ORPHAN_SECTION_ERROR)
zephyr_ld_options(
${LINKERFLAGPREFIX},--orphan-handling=error
)
endif()
endif()
if(CONFIG_HAVE_CUSTOM_LINKER_SCRIPT)
set(LINKER_SCRIPT ${APPLICATION_SOURCE_DIR}/${CONFIG_CUSTOM_LINKER_SCRIPT})
if(NOT EXISTS ${LINKER_SCRIPT})
set(LINKER_SCRIPT ${CONFIG_CUSTOM_LINKER_SCRIPT})
assert_exists(CONFIG_CUSTOM_LINKER_SCRIPT)
endif()
else()
# Try a board specific linker file
set(LINKER_SCRIPT ${BOARD_DIR}/linker.ld)
if(NOT EXISTS ${LINKER_SCRIPT})
# If not available, try an SoC specific linker file
set(LINKER_SCRIPT ${SOC_DIR}/${ARCH}/${SOC_PATH}/linker.ld)
endif()
endif()
if(NOT EXISTS ${LINKER_SCRIPT})
message(FATAL_ERROR "Could not find linker script: '${LINKER_SCRIPT}'. Corrupted configuration?")
endif()
# Custom section support in linker scripts requires that the application source
# directory is in the preprocessor search path, in order to find the custom
# linker script fragments.
if(CONFIG_CUSTOM_RODATA_LD OR CONFIG_CUSTOM_RWDATA_LD OR CONFIG_CUSTOM_SECTIONS_LD)
zephyr_include_directories(${APPLICATION_SOURCE_DIR})
endif()
configure_file(version.h.in ${PROJECT_BINARY_DIR}/include/generated/version.h)
# Unfortunately, the order in which CMakeLists.txt code is processed
# matters so we need to be careful about how we order the processing
# of subdirectories. One example is "Compiler flags added late in the
# build are not exported to external build systems #5605"; when we
# integrate with an external build system we read out all compiler
# flags when the external project is created. So an external project
# defined in subsys or ext will not get global flags added by drivers/
# or tests/ as the subdirectories are ordered now.
#
# Another example of when the order matters is the reading and writing
# of global properties such as ZEPHYR_LIBS or
# GENERATED_KERNEL_OBJECT_FILES.
#
# Arch is placed early because it defines important compiler flags
# that must be exported to external build systems defined in
# e.g. subsys/.
add_subdirectory(arch)
add_subdirectory(lib)
add_subdirectory(misc)
# We use include instead of add_subdirectory to avoid creating a new directory scope.
# This is because source file properties are directory scoped, including the GENERATED
# property which is set implicitly for custom command outputs
include(misc/generated/CMakeLists.txt)
if(EXISTS ${SOC_DIR}/${ARCH}/CMakeLists.txt)
add_subdirectory(${SOC_DIR}/${ARCH} soc/${ARCH})
else()
add_subdirectory(${SOC_DIR}/${ARCH}/${SOC_PATH} soc/${ARCH}/${SOC_PATH})
endif()
add_subdirectory(boards)
add_subdirectory(ext)
add_subdirectory(subsys)
add_subdirectory(drivers)
add_subdirectory(tests)
set(syscall_macros_h ${ZEPHYR_BINARY_DIR}/include/generated/syscall_macros.h)
add_custom_target(syscall_macros_h_target DEPENDS ${syscall_macros_h})
add_custom_command( OUTPUT ${syscall_macros_h}
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/gen_syscall_header.py
> ${syscall_macros_h}
DEPENDS ${ZEPHYR_BASE}/scripts/gen_syscall_header.py
)
set(syscall_list_h ${CMAKE_CURRENT_BINARY_DIR}/include/generated/syscall_list.h)
set(syscalls_json ${CMAKE_CURRENT_BINARY_DIR}/misc/generated/syscalls.json)
# The syscalls subdirs txt file is constructed by python containing a list of folders to use for
# dependency handling, including empty folders.
# Windows: The list is used to specify DIRECTORY list with CMAKE_CONFIGURE_DEPENDS attribute.
# Other OS: The list will update whenever a file is added/removed/modified and ensure a re-build.
set(syscalls_subdirs_txt ${CMAKE_CURRENT_BINARY_DIR}/misc/generated/syscalls_subdirs.txt)
# As syscalls_subdirs_txt is updated whenever a file is modified, this file can not be used for
# monitoring of added / removed folders. A trigger file is thus used for correct dependency
# handling. The trigger file will update when a folder is added / removed.
set(syscalls_subdirs_trigger ${CMAKE_CURRENT_BINARY_DIR}/misc/generated/syscalls_subdirs.trigger)
if(NOT (${CMAKE_HOST_SYSTEM_NAME} STREQUAL Windows))
set(syscalls_links --create-links ${CMAKE_CURRENT_BINARY_DIR}/misc/generated/syscalls_links)
endif()
# When running CMake it must be ensured that all dependencies are correctly acquired.
execute_process(
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/subfolder_list.py
--directory ${ZEPHYR_BASE}/include # Walk this directory
--out-file ${syscalls_subdirs_txt} # Write file with discovered folder
--trigger ${syscalls_subdirs_trigger} # Trigger file that is used for json generation
${syscalls_links} # If defined, create symlinks for dependencies
)
file(STRINGS ${syscalls_subdirs_txt} PARSE_SYSCALLS_PATHS_DEPENDS)
if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL Windows)
# On windows only adding/removing files or folders will be reflected in depends.
# Hence adding a file requires CMake to re-run to add this file to the file list.
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${PARSE_SYSCALLS_PATHS_DEPENDS})
# Also On Windows each header file must be monitored as file modifications are not reflected
# on directory level.
file(GLOB_RECURSE PARSE_SYSCALLS_HEADER_DEPENDS ${ZEPHYR_BASE}/include/*.h)
else()
# The syscall parsing depends on the folders in order to detect add/removed/modified files.
# When a folder is removed, CMake will try to find a target that creates that dependency.
# This command sets up the target for CMake to find.
# Without this code, CMake will fail with the following error:
# <folder> needed by '<target>', missing and no known rule to make it
# when a folder is removed.
add_custom_command(OUTPUT ${PARSE_SYSCALLS_PATHS_DEPENDS}
COMMAND ${CMAKE_COMMAND} -E echo ""
COMMENT "Preparing syscall dependency handling"
)
add_custom_command(
OUTPUT
${syscalls_subdirs_trigger}
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/subfolder_list.py
--directory ${ZEPHYR_BASE}/include # Walk this directory
--out-file ${syscalls_subdirs_txt} # Write file with discovered folder
--trigger ${syscalls_subdirs_trigger} # Trigger file that is used for json generation
${syscalls_links} # If defined, create symlinks for dependencies
DEPENDS ${PARSE_SYSCALLS_PATHS_DEPENDS}
)
# Ensure subdir file always exists when specifying CMake dependency.
if(NOT EXISTS ${syscalls_subdirs_txt})
file(WRITE ${syscalls_subdirs_txt} "")
endif()
# On other OS'es, modifying a file is reflected on the folder timestamp and hence detected
# when using depend on directory level.
# Thus CMake only needs to re-run when sub-directories are added / removed, which is indicated
# using a trigger file.
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${syscalls_subdirs_txt})
endif()
# SYSCALL_INCLUDE_DIRECTORY will include the directories that needs to be
# searched for syscall declarations if CONFIG_APPLICATION_DEFINED_SYSCALL is set
if(CONFIG_APPLICATION_DEFINED_SYSCALL)
set(SYSCALL_INCLUDE_DIRECTORY --include ${APPLICATION_SOURCE_DIR})
endif()
add_custom_command(
OUTPUT
${syscalls_json}
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/parse_syscalls.py
--include ${ZEPHYR_BASE}/include # Read files from this dir
${SYSCALL_INCLUDE_DIRECTORY}
--json-file ${syscalls_json} # Write this file
DEPENDS ${syscalls_subdirs_trigger} ${PARSE_SYSCALLS_HEADER_DEPENDS}
)
add_custom_target(syscall_list_h_target DEPENDS ${syscall_list_h})
add_custom_command(OUTPUT include/generated/syscall_dispatch.c ${syscall_list_h}
# Also, some files are written to include/generated/syscalls/
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/gen_syscalls.py
--json-file ${syscalls_json} # Read this file
--base-output include/generated/syscalls # Write to this dir
--syscall-dispatch include/generated/syscall_dispatch.c # Write this file
--syscall-list ${syscall_list_h}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
DEPENDS ${syscalls_json}
)
set(DRV_VALIDATION ${PROJECT_BINARY_DIR}/include/generated/driver-validation.h)
add_custom_command(
OUTPUT ${DRV_VALIDATION}
COMMAND
${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/scripts/gen_kobject_list.py
--validation-output ${DRV_VALIDATION}
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(driver_validation_h_target DEPENDS ${DRV_VALIDATION})
include($ENV{ZEPHYR_BASE}/cmake/kobj.cmake)
gen_kobj(KOBJ_INCLUDE_PATH)
# Generate offsets.c.obj from offsets.c
# Generate offsets.h from offsets.c.obj
set(OFFSETS_C_PATH ${ZEPHYR_BASE}/arch/${ARCH}/core/offsets/offsets.c)
set(OFFSETS_O_PATH ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/offsets.dir/arch/${ARCH}/core/offsets/offsets.c.obj)
set(OFFSETS_H_PATH ${PROJECT_BINARY_DIR}/include/generated/offsets.h)
add_library( offsets STATIC ${OFFSETS_C_PATH})
target_link_libraries(offsets zephyr_interface)
add_dependencies( offsets
syscall_list_h_target
syscall_macros_h_target
driver_validation_h_target
kobj_types_h_target
)
add_custom_command(
OUTPUT ${OFFSETS_H_PATH}
COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/gen_offset_header.py
-i ${OFFSETS_O_PATH}
-o ${OFFSETS_H_PATH}
DEPENDS offsets
)
add_custom_target(offsets_h DEPENDS ${OFFSETS_H_PATH})
zephyr_include_directories(${TOOLCHAIN_INCLUDES})
zephyr_get_include_directories_for_lang(C ZEPHYR_INCLUDES)
add_subdirectory(kernel)
# Read list content
get_property(ZEPHYR_LIBS_PROPERTY GLOBAL PROPERTY ZEPHYR_LIBS)
foreach(zephyr_lib ${ZEPHYR_LIBS_PROPERTY})
# TODO: Could this become an INTERFACE property of zephyr_interface?
add_dependencies(${zephyr_lib} offsets_h)
# Verify that all (non-imported) libraries have source
# files. Libraries without source files are not supported because
# they are an indication that something has been misconfigured.
get_target_property(lib_imported ${zephyr_lib} IMPORTED)
get_target_property(lib_sources ${zephyr_lib} SOURCES)
if(lib_sources STREQUAL lib_sources-NOTFOUND
AND (NOT (${zephyr_lib} STREQUAL app))
AND (NOT lib_imported)
)
# app is not checked because it's sources are added to it after
# this CMakeLists.txt file has been processed
message(FATAL_ERROR "\
The Zephyr library '${zephyr_lib}' was created without source files. \
Empty (non-imported) libraries are not supported. \
Either make sure that the library has the sources it should have, \
or make sure it is not created when it has no source files.")
endif()
endforeach()
get_property(OUTPUT_FORMAT GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT)
get_property(LINKER_SCRIPT_DEFINES GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES)
if(CONFIG_APPLICATION_MEMORY)
# Objects default to being in kernel space, and then we exclude
# certain items.
set(kernel_object_file_list
${ZEPHYR_LIBS_PROPERTY}
kernel
)
list(
REMOVE_ITEM
kernel_object_file_list
app
)
# The zephyr libraries in zephyr/lib/ and zephyr/test/ belong in
# userspace.
# NB: The business logic for determing what source files are in
# kernel space and what source files are in user space is
# fragile. Fix ASAP.
#
# The intended design is that certain directories are designated as
# containing userspace code and others for kernel space code. The
# implementation we have however is not working on directories of
# code, it is working on zephyr libraries. It is exploiting the fact
# that zephyr libraries follow a naming scheme as described in
# extensions.cmake:zephyr_library_get_current_dir_lib_name
#
# But code from test/ and lib/ that is placed in the "zephyr"
# library (with zephyr_sources()) will not be in a library that is
# prefixed with lib__ or test__ and will end up in the wrong address
# space.
set(application_space_dirs
lib
tests
)
foreach(f ${kernel_object_file_list})
foreach(app_dir ${application_space_dirs})
if(${f} MATCHES "^${app_dir}__") # Begins with ${app_dir}__, e.g. lib__libc
list(
REMOVE_ITEM
kernel_object_file_list
${f}
)
endif()
endforeach()
endforeach()
# Create a list ks, with relative paths to kernel space libs.
foreach(f ${kernel_object_file_list})
get_target_property(target_name ${f} NAME)
get_target_property(target_binary_dir ${f} BINARY_DIR)
string(REPLACE
${PROJECT_BINARY_DIR}
""
fixed_path
${target_binary_dir}
)
# Append / if not empty
if(fixed_path)
set(fixed_path "${fixed_path}/")
endif()
# Cut off leading / if present
if(fixed_path MATCHES "^/.+")
string(SUBSTRING ${fixed_path} 1 -1 fixed_path)
endif()
set(fixed_path "${fixed_path}lib${target_name}.a")
if(CMAKE_GENERATOR STREQUAL "Ninja")
# Ninja invokes the linker from the root of the build directory
# (APPLICATION_BINARY_DIR) instead of from the build/zephyr
# directory (PROJECT_BINARY_DIR). So for linker-defs.h to get
# the correct path we need to prefix with zephyr/.
set(fixed_path "zephyr/${fixed_path}")
endif()
list(APPEND ks ${fixed_path})
endforeach()
# We are done constructing kernel_object_file_list, now we inject
# this list into the linker script through the define
# KERNELSPACE_OBJECT_FILES
set(def -DKERNELSPACE_OBJECT_FILES=)
foreach(f ${ks})
set(def "${def} ${f}")
endforeach()
list(APPEND LINKER_SCRIPT_DEFINES ${def})
endif() # CONFIG_APPLICATION_MEMORY
# Declare MPU userspace dependencies before the linker scripts to make
# sure the order of dependencies are met
if(CONFIG_CPU_HAS_MPU AND CONFIG_USERSPACE)
if(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT AND CONFIG_APP_SHARED_MEM )
set(APP_SMEM_DEP app_smem_linker)
endif()
if(CONFIG_MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT AND CONFIG_APPLICATION_MEMORY)
set(ALIGN_SIZING_DEP app_sizing_prebuilt linker_app_sizing_script)
endif()
if(CONFIG_ARM)
set(PRIV_STACK_DEP priv_stacks_prebuilt)
endif()
endif()
function(construct_add_custom_command_for_linker_pass linker_output_name output_variable)
set(linker_cmd_file_name ${linker_output_name}.cmd)
if (${linker_output_name} MATCHES "^linker_pass_final$")
set(LINKER_PASS_DEFINE -DLINKER_PASS2)
else()
set(LINKER_PASS_DEFINE "")
endif()
# Different generators deal with depfiles differently.
if(CMAKE_GENERATOR STREQUAL "Unix Makefiles")
# Note that the IMPLICIT_DEPENDS option is currently supported only
# for Makefile generators and will be ignored by other generators.
set(LINKER_SCRIPT_DEP IMPLICIT_DEPENDS C ${LINKER_SCRIPT})
elseif(CMAKE_GENERATOR STREQUAL "Ninja")
# Using DEPFILE with other generators than Ninja is an error.
set(LINKER_SCRIPT_DEP DEPFILE ${PROJECT_BINARY_DIR}/${linker_cmd_file_name}.dep)
else()
# TODO: How would the linker script dependencies work for non-linker
# script generators.
message(STATUS "Warning; this generator is not well supported. The
Linker script may not be regenerated when it should.")
set(LINKER_SCRIPT_DEP "")
endif()
set(${output_variable}
OUTPUT ${linker_cmd_file_name}
DEPENDS ${LINKER_SCRIPT}
${LINKER_SCRIPT_DEP}
COMMAND ${CMAKE_C_COMPILER}
-x assembler-with-cpp
${NOSTDINC_F}
${NOSYSDEF_CFLAG}
-MD -MF ${linker_cmd_file_name}.dep -MT ${BASE_NAME}/${linker_cmd_file_name}
${ZEPHYR_INCLUDES}
${LINKER_SCRIPT_DEFINES}
${LINKER_PASS_DEFINE}
-E ${LINKER_SCRIPT}
-P # Prevent generation of debug `#line' directives.
-o ${linker_cmd_file_name}
VERBATIM
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
PARENT_SCOPE
)
endfunction()
get_filename_component(BASE_NAME ${CMAKE_CURRENT_BINARY_DIR} NAME)
construct_add_custom_command_for_linker_pass(linker custom_command)
add_custom_command(
${custom_command}
)
add_custom_target(
linker_script
DEPENDS
${ALIGN_SIZING_DEP} ${PRIV_STACK_DEP}
${APP_SMEM_DEP}
linker.cmd
offsets_h
)
# Give the 'linker_script' target all of the include directories so
# that cmake can successfully find the linker_script's header
# dependencies.
zephyr_get_include_directories_for_lang(C
ZEPHYR_INCLUDE_DIRS
STRIP_PREFIX # Don't use a -I prefix
)
set_property(TARGET
linker_script
PROPERTY INCLUDE_DIRECTORIES
${ZEPHYR_INCLUDE_DIRS}
)
set(zephyr_lnk
${LINKERFLAGPREFIX},-Map=${PROJECT_BINARY_DIR}/${KERNEL_MAP_NAME}
-u_OffsetAbsSyms
-u_ConfigAbsSyms
${LINKERFLAGPREFIX},--whole-archive
${ZEPHYR_LIBS_PROPERTY}
${LINKERFLAGPREFIX},--no-whole-archive
kernel
${OFFSETS_O_PATH}
${LIB_INCLUDE_DIR}
-L${PROJECT_BINARY_DIR}
${TOOLCHAIN_LIBS}
)
if(CONFIG_GEN_ISR_TABLES)
if(CONFIG_GEN_SW_ISR_TABLE)
list(APPEND GEN_ISR_TABLE_EXTRA_ARG --sw-isr-table)
endif()
if(CONFIG_GEN_IRQ_VECTOR_TABLE)
list(APPEND GEN_ISR_TABLE_EXTRA_ARG --vector-table)
endif()
# isr_tables.c is generated from zephyr_prebuilt by
# gen_isr_tables.py
add_custom_command(
OUTPUT isr_tables.c
COMMAND ${CMAKE_OBJCOPY}
-I ${OUTPUT_FORMAT}
-O binary
--only-section=.intList
$<TARGET_FILE:zephyr_prebuilt>
isrList.bin
COMMAND ${PYTHON_EXECUTABLE}
${ZEPHYR_BASE}/arch/common/gen_isr_tables.py
--output-source isr_tables.c
--kernel $<TARGET_FILE:zephyr_prebuilt>
--intlist isrList.bin
$<$<BOOL:${CONFIG_BIG_ENDIAN}>:--big-endian>
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--debug>
${GEN_ISR_TABLE_EXTRA_ARG}
DEPENDS zephyr_prebuilt
)
set_property(GLOBAL APPEND PROPERTY GENERATED_KERNEL_SOURCE_FILES isr_tables.c)
endif()
if(CONFIG_ARM AND CONFIG_USERSPACE)
set(GEN_PRIV_STACKS $ENV{ZEPHYR_BASE}/scripts/gen_priv_stacks.py)
set(PROCESS_PRIV_STACKS_GPERF $ENV{ZEPHYR_BASE}/scripts/process_gperf.py)
set(PRIV_STACKS priv_stacks_hash.gperf)
set(PRIV_STACKS_OUTPUT_SRC_PRE priv_stacks_hash_preprocessed.c)
set(PRIV_STACKS_OUTPUT_SRC priv_stacks_hash.c)
set(PRIV_STACKS_OUTPUT_OBJ priv_stacks_hash.c.obj)
set(PRIV_STACKS_OUTPUT_OBJ_RENAMED priv_stacks_hash_renamed.o)
# Essentially what we are doing here is extracting some information
# out of the nearly finished elf file, generating the source code
# for a hash table based on that information, and then compiling and
# linking the hash table back into a now even more nearly finished
# elf file.
# Use the script GEN_PRIV_STACKS to scan the kernel binary's
# (zephyr_prebuilt) DWARF information to produce a table of kernel
# objects (PRIV_STACKS) which we will then pass to gperf
add_custom_command(
OUTPUT ${PRIV_STACKS}
COMMAND
${PYTHON_EXECUTABLE}
${GEN_PRIV_STACKS}
--kernel $<TARGET_FILE:priv_stacks_prebuilt>
--output ${PRIV_STACKS}
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
DEPENDS priv_stacks_prebuilt
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(priv_stacks DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS})
# Use gperf to generate C code (PRIV_STACKS_OUTPUT_SRC_PRE) which implements a
# perfect hashtable based on PRIV_STACKS
add_custom_command(
OUTPUT ${PRIV_STACKS_OUTPUT_SRC_PRE}
COMMAND
${GPERF} -C
--output-file ${PRIV_STACKS_OUTPUT_SRC_PRE}
${PRIV_STACKS}
DEPENDS priv_stacks ${PRIV_STACKS}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(priv_stacks_output_src_pre DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_SRC_PRE})
# For our purposes the code/data generated by gperf is not optimal.
#
# The script PROCESS_GPERF creates a new c file OUTPUT_SRC based on
# OUTPUT_SRC_PRE to greatly reduce the amount of code/data generated
# since we know we are always working with pointer values
add_custom_command(
OUTPUT ${PRIV_STACKS_OUTPUT_SRC}
COMMAND
${PYTHON_EXECUTABLE}
${PROCESS_PRIV_STACKS_GPERF}
-i ${PRIV_STACKS_OUTPUT_SRC_PRE}
-o ${PRIV_STACKS_OUTPUT_SRC}
-p "struct _k_priv_stack_map"
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
DEPENDS priv_stacks_output_src_pre ${PRIV_STACKS_OUTPUT_SRC_PRE}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(priv_stacks_output_src DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_SRC})
# We need precise control of where generated text/data ends up in the final
# kernel image. Disable function/data sections and use objcopy to move
# generated data into special section names
add_library(priv_stacks_output_lib STATIC
${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_SRC}
)
target_link_libraries(priv_stacks_output_lib zephyr_interface)
# Turn off -ffunction-sections, etc.
# NB: Using a library instead of target_compile_options(priv_stacks_output_lib
# [...]) because a library's options have precedence
add_library(priv_stacks_output_lib_interface INTERFACE)
target_compile_options(priv_stacks_output_lib_interface INTERFACE
-fno-function-sections
-fno-data-sections
)
target_link_libraries(priv_stacks_output_lib priv_stacks_output_lib_interface)
set(PRIV_STACKS_OUTPUT_OBJ_PATH ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/priv_stacks_output_lib.dir/${PRIV_STACKS_OUTPUT_OBJ})
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_OBJ_RENAMED}
COMMAND
${CMAKE_OBJCOPY}
--rename-section .bss=.priv_stacks.noinit
--rename-section .data=.priv_stacks.data
--rename-section .text=.priv_stacks.text
--rename-section .rodata=.priv_stacks.rodata
${PRIV_STACKS_OUTPUT_OBJ_PATH}
${PRIV_STACKS_OUTPUT_OBJ_RENAMED}
DEPENDS priv_stacks_output_lib
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(priv_stacks_output_obj_renamed DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_OBJ_RENAMED})
add_library(priv_stacks_output_obj_renamed_lib STATIC IMPORTED GLOBAL)
set_property(
TARGET priv_stacks_output_obj_renamed_lib
PROPERTY
IMPORTED_LOCATION ${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_OBJ_RENAMED}
)
add_dependencies(
priv_stacks_output_obj_renamed_lib
priv_stacks_output_obj_renamed
)
set_property(GLOBAL APPEND PROPERTY GENERATED_KERNEL_OBJECT_FILES priv_stacks_output_obj_renamed_lib)
endif()
if(CONFIG_USERSPACE)
set(GEN_KOBJ_LIST ${ZEPHYR_BASE}/scripts/gen_kobject_list.py)
set(PROCESS_GPERF ${ZEPHYR_BASE}/scripts/process_gperf.py)
set(OBJ_LIST kobject_hash.gperf)
set(OUTPUT_SRC_PRE kobject_hash_preprocessed.c)
set(OUTPUT_SRC kobject_hash.c)
set(OUTPUT_OBJ kobject_hash.c.obj)
set(OUTPUT_OBJ_RENAMED kobject_hash_renamed.o)
# Essentially what we are doing here is extracting some information
# out of the nearly finished elf file, generating the source code
# for a hash table based on that information, and then compiling and
# linking the hash table back into a now even more nearly finished
# elf file.
# Use the script GEN_KOBJ_LIST to scan the kernel binary's
# (zephyr_prebuilt) DWARF information to produce a table of kernel
# objects (OBJ_LIST) which we will then pass to gperf
add_custom_command(
OUTPUT ${OBJ_LIST}
COMMAND
${PYTHON_EXECUTABLE}
${GEN_KOBJ_LIST}
--kernel $<TARGET_FILE:zephyr_prebuilt>
--gperf-output ${OBJ_LIST}
$<$<BOOL:${CMAKE_VERBOSE_MAKEFILE}>:--verbose>
DEPENDS zephyr_prebuilt
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(obj_list DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OBJ_LIST})
# Use gperf to generate C code (OUTPUT_SRC_PRE) which implements a
# perfect hashtable based on OBJ_LIST
add_custom_command(
OUTPUT ${OUTPUT_SRC_PRE}
COMMAND
${GPERF}
--output-file ${OUTPUT_SRC_PRE}
${OBJ_LIST}
DEPENDS obj_list ${OBJ_LIST}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
)
add_custom_target(output_src_pre DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_SRC_PRE})
# For our purposes the code/data generated by gperf is not optimal.
#
# The script PROCESS_GPERF creates a new c file OUTPUT_SRC based on
# OUTPUT_SRC_PRE to greatly reduce the amount of code/data generated
# since we know we are always working with pointer values