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seL4/CMakeLists.txt

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CMake
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#
# Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
#
# SPDX-License-Identifier: GPL-2.0-only
#
cmake_minimum_required(VERSION 3.16.0)
include(CheckCCompilerFlag)
include(${CMAKE_CURRENT_LIST_DIR}/configs/seL4Config.cmake)
project(seL4 C ASM)
# First find our helpers
find_file(KERNEL_HELPERS_PATH helpers.cmake PATHS tools CMAKE_FIND_ROOT_PATH_BOTH)
mark_as_advanced(FORCE KERNEL_HELPERS_PATH)
include(${KERNEL_HELPERS_PATH})
function(RequireTool config file)
RequireFile("${config}" "${file}" PATHS tools)
endfunction(RequireTool)
RequireTool(KERNEL_FLAGS_PATH flags.cmake)
if(CCACHEFOUND)
set(ccache "ccache")
endif()
include(tools/internal.cmake)
# Define tools used by the kernel
set(PYTHON3 "python3" CACHE INTERNAL "")
RequireTool(CPP_GEN_PATH cpp_gen.sh)
RequireTool(CIRCULAR_INCLUDES circular_includes.py)
RequireTool(CONFIG_GEN_PATH config_gen.py)
RequireTool(BF_GEN_PATH bitfield_gen.py)
RequireTool(HARDWARE_GEN_PATH hardware_gen.py)
RequireTool(INVOCATION_ID_GEN_PATH invocation_header_gen.py)
RequireTool(INVOCATION_JSON_GEN_PATH invocation_json_gen.py)
RequireTool(SYSCALL_ID_GEN_PATH syscall_header_gen.py)
RequireTool(XMLLINT_PATH xmllint.sh)
# Process the configuration scripts
include(config.cmake)
# Define default global flag information so that users can compile with the same
# basic architecture flags as the kernel
string(APPEND common_flags " -D__KERNEL_${KernelWordSize}__")
if(KernelArchX86)
if(${KernelX86MicroArch} STREQUAL "generic")
string(APPEND common_flags " -mtune=generic")
else()
string(APPEND common_flags " -march=${KernelX86MicroArch}")
endif()
if(KernelSel4ArchX86_64)
string(APPEND common_exe_flags " -Wl,-m,elf_x86_64")
elseif(KernelSel4ArchIA32)
string(APPEND common_exe_flags " -Wl,-m,elf_i386")
else()
message(FATAL_ERROR "unknown x86 KernelSel4Arch '${KernelSel4Arch}'")
endif()
string(APPEND c_common_flags " -m${KernelWordSize}")
if(LLVM_TOOLCHAIN)
if(KernelSel4ArchIA32)
string(APPEND asm_common_flags " -m32")
endif()
else() # default is GCC toolchain
string(APPEND asm_common_flags " -Wa,--${KernelWordSize}")
endif()
elseif(KernelArchARM)
set(arm_march "${KernelArmArmV}${KernelArmMachFeatureModifiers}")
string(APPEND c_common_flags " -march=${arm_march}")
string(APPEND asm_common_flags " -march=${arm_march}")
if(KernelSel4ArchAarch64)
# nothing special
elseif(KernelSel4ArchAarch32)
# Explicitly request ARM instead of THUMB for compilation.
string(APPEND c_common_flags " -marm")
else()
message(FATAL_ERROR "unknown ARM KernelSel4Arch '${KernelSel4Arch}'")
endif()
elseif(KernelArchRiscV)
# The "RISC-V Instruction Set Manual, Volume I: RISC-V User-Level ISA",
# chapter "ISA Extension Naming Conventions" describes the march string. Its
# form is roughly "rv(32|64)((im?a?f?d?)|g)q?c?b?...", where 'g' equals
# 'mafd_Zicsr_Zifencei'. Underscores are allowed as extension separator and
# even required between for all Z-extensions.
if(KernelSel4ArchRiscV32)
set(_riscv_march "rv32i") # Currently we don't support "rv32e"
set(_riscv_mabi "ilp32")
elseif(KernelSel4ArchRiscV64)
set(_riscv_march "rv64i")
set(_riscv_mabi "lp64")
else()
message(FATAL_ERROR "unknown RISC-V KernelSel4Arch '${KernelSel4Arch}'")
endif()
# Currently there are no KernelRiscvExtM or KernelRiscvExtA, thus the
# M-extension and A-extension are always enabled.
string(APPEND _riscv_march "ma")
# FPU support. The Q-extension implies the D-extension, which implies the
# F-extension, which implies the "Zicsr"-extension. Currently there is no
# KernelRiscvExtQ yet.
if(KernelRiscvExtD)
# Since the D-extension implies F-extension, specifying "d" would be
# sufficient. But it's common practice to say "fd"
string(APPEND _riscv_march "fd")
# Pass floating-point values up to 64 bits in F registers
string(APPEND _riscv_mabi "d")
elseif(KernelRiscvExtF)
string(APPEND _riscv_march "f")
# Pass floating-point values up to 32 bits in F registers
string(APPEND _riscv_mabi "f")
endif()
# Currently there is no KernelRiscvExtC and thus the C-extension is always
# enabled
string(APPEND _riscv_march "c")
# Determine if GNU toolchain is used and if yes, whether GCC version >= 11.3 (implies binutils version >= 2.38)
if(
CMAKE_ASM_COMPILER_ID STREQUAL "GNU"
AND CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "11.3"
)
# Manually enable Zicsr and Zifencei extensions
# This became necessary due to a change in the default ISA version in GNU binutils 2.38 which is the
# default binutils version shipped with GCC 11.3
string(APPEND _riscv_march "_zicsr_zifencei")
endif()
string(APPEND common_flags " -march=${_riscv_march} -mabi=${_riscv_mabi}")
else()
message(FATAL_ERROR "unknown KernelArch '${KernelArch}'")
endif()
set(
BASE_ASM_FLAGS "${asm_common_flags} ${common_flags}"
CACHE INTERNAL "Default ASM flags for compilation \
(subset of flags used by the kernel build)"
)
set(
BASE_C_FLAGS "${c_common_flags} ${common_flags}"
CACHE INTERNAL "Default C flags for compilation \
(subset of flags used by the kernel)"
)
set(
BASE_CXX_FLAGS "${cxx_common_flags} ${c_common_flags} ${common_flags}"
CACHE INTERNAL "Default CXX flags for compilation"
)
set(
BASE_EXE_LINKER_FLAGS "${common_flags} ${common_exe_flags} "
CACHE INTERNAL "Default flags for linker an elf binary application"
)
# Setup kernel specific flags. Initialize all flags them from the same base
# flags that the users will use. The kernel is a stand-alone application with a
# custom implementation of the standard libraries.
include(${KERNEL_FLAGS_PATH})
add_compile_options(
-std=c99
#-----------------------------------
# Configure warnings
#-----------------------------------
-Wall
-Werror
-Wstrict-prototypes
-Wmissing-prototypes
-Wnested-externs
-Wmissing-declarations
-Wundef
-Wpointer-arith
-Wno-nonnull
#-----------------------------------
# Configure compiler settings.
#-----------------------------------
-nostdinc # Do not use any system include paths, only use those given
# explicitly by the "-I <path>" parameters.
-ffreestanding # implies "-fno-builtin". Execution will not start at main().
# No assumptions about the meaning of function names from the
# standard library are made, except for memcpy(), memmove(),
# memset() and memcmp(). __builtin_trap() will call abort().
-fno-stack-protector
-fno-asynchronous-unwind-tables
# GCC < 10 and clang < 11 put uninitialized global variables into a 'COMMON'
# section unless '-fno-common' is specified. The linker will put anything
# from 'COMMON' as the end of the '.bss' if nothing else is specified in the
# linker script. Besides making the variable placement look odd, this also
# tends to waste a page because we puts large aligned block at the end.
# Eventually, GCC 10 and clang 11 made '-fno-common' the default, see
# - https://gcc.gnu.org/gcc-10/changes.html
# - https://releases.llvm.org/11.0.0/tools/clang/docs/ReleaseNotes.html
-fno-common
)
# Linker parameters. There are two kinds actually:
# - flags processed by GCC when invoking it as linker wrapper
# - flags passed by GCC to the actual linker invocation ("-Wl,<flag>").
string(
APPEND CMAKE_EXE_LINKER_FLAGS
# KernelCommonFlags adds "-nostdlib", it's the GCC linker step counterpart
# for "-ffreestanding" and makes GCC not use the standard system startup
# files or libraries. This also excludes GCC's helper library libgcc. Any
# libraries that are to be linked must be specified explicitly. Tests have
# shown that this parameter doesn't prevent GCC from adding paths from a
# "-L <path>" argument to the linker invocation for the standard libs, and
# there seems no option that prevents this apart from providing an entirely
# different specs file via -specs=<file>. Note that "-Wl,-nostdlib" is not
# used here, because it is not needed. It makes the linker use library
# directories specified on the command line only and ignore any SEARCH_DIR
# set in a linker script. We provide our own linker scripts, and these
# don't set SEARCH_DIR.
" -static" # Implies "-no-pie" (and overrides "-pie"). The ld 2.37 docs say
# "-no-pie" is a linker option, but passing "-Wl,-no-pie" fails.
" -Wl,--build-id=none" # Ensure reproducible builds
" -Wl,-n" # Disable page alignment of sections
)
# Setup kernel specific flags used for both the compilation and linking step
macro(KernelCommonFlags)
foreach(common_flag IN ITEMS ${ARGV})
add_compile_options(${common_flag})
string(APPEND CMAKE_EXE_LINKER_FLAGS " ${common_flag} ")
endforeach()
endmacro(KernelCommonFlags)
KernelCommonFlags(
${KernelOptimisation}
# The following options are gcc options, it is unclear if ld options are
# generated automatically when gcc wraps the linking step and invokes ld.
-nostdlib -fno-pic -fno-pie
)
# Disable cloned functions. This is needed for binary verification at -O2.
if(NOT KernelOptimisationCloneFunctions AND (CMAKE_C_COMPILER_ID STREQUAL "GNU"))
KernelCommonFlags(-fno-partial-inlining -fno-ipa-cp -fno-ipa-sra)
endif()
if(KernelFWholeProgram)
# KernelFWholeProgram is still an experimental feature and disabled by
# default. Clarify if the linker step via GCC actually cares about this
# parameter. There are also the options -flto and -fuse-linker-plugin that
# might be a more modern approach.
KernelCommonFlags(-fwhole-program)
endif()
if(KernelDebugBuild)
KernelCommonFlags(-DDEBUG -g -ggdb)
# Pretend to CMake that we're a release build with debug info. This is because
# we do actually allow CMake to do the final link step, so we'd like it not to
# strip our binary
set(CMAKE_BUILD_TYPE "RelWithDebInfo")
else()
set(CMAKE_BUILD_TYPE "Release")
endif()
if(KernelArchX86)
if(KernelSel4ArchX86_64)
KernelCommonFlags(-mcmodel=kernel)
elseif(KernelSel4ArchIA32)
# nothing special
else()
message(FATAL_ERROR "unknown x86 KernelSel4Arch '${KernelSel4Arch}'")
endif()
add_compile_options(-mno-mmx -mno-sse -mno-sse2 -mno-3dnow)
elseif(KernelArchARM)
if(KernelSel4ArchAarch64)
KernelCommonFlags(-mgeneral-regs-only)
if(
((CMAKE_C_COMPILER_ID STREQUAL "GNU")
AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "10.0.0")
)
OR
((CMAKE_C_COMPILER_ID STREQUAL "Clang")
AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "12.0.0")
)
)
add_compile_options(-mno-outline-atomics)
endif()
elseif(KernelSel4ArchAarch32)
KernelCommonFlags(-mfloat-abi=soft)
else()
message(FATAL_ERROR "unknown ARM KernelSel4Arch '${KernelSel4Arch}'")
endif()
elseif(KernelArchRiscV)
# Group "small" data objects together in a small-data section so they can
# be referenced using gp-relative addressing. The exact value of
# small-data-limit is not crucial but it should be lowered if .small
# exceeds 4KiB.
#
KernelCommonFlags(-mcmodel=medany -msmall-data-limit=1024)
else()
message(FATAL_ERROR "unknown KernelArch '${KernelArch}'")
endif()
if(
(CMAKE_C_COMPILER_ID STREQUAL "Clang")
AND (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "20.0.0")
)
# To avoid clang: error: argument unused during compilation: '-c'
add_compile_options(-Wno-unused-command-line-argument)
endif()
# Sort the C sources to ensure a stable layout of the final C file
list(SORT c_sources)
# Add the domain schedule now that its sorted
list(APPEND c_sources "${KernelDomainSchedule}")
# Add static header includes
include_directories(
"include"
"include/${KernelWordSize}"
"include/arch/${KernelArch}"
"include/arch/${KernelArch}/arch/${KernelWordSize}"
"include/plat/${KernelPlatform}"
"include/plat/${KernelPlatform}/plat/${KernelWordSize}"
)
if(KernelArchARM)
include_directories(
"include/arch/arm/armv/${KernelArmArmV}"
"include/arch/arm/armv/${KernelArmArmV}/${KernelWordSize}"
)
endif()
if(KernelArmMach STREQUAL "exynos")
include_directories("include/plat/exynos_common/")
endif()
# Add libsel4 include directories. These are explicitly added instead of calling
# target_link_libraries(${target} sel4) because we don't want to inherit any
# other build options from libsel4.
include_directories(
"libsel4/include"
"libsel4/arch_include/${KernelArch}"
"libsel4/sel4_arch_include/${KernelSel4Arch}"
"libsel4/sel4_plat_include/${KernelPlatform}"
"libsel4/mode_include/${KernelWordSize}"
)
#
# Config generation
#
include_directories($<TARGET_PROPERTY:kernel_Config,INTERFACE_INCLUDE_DIRECTORIES>)
# The kernel expects to be able to include an 'autoconf.h' file at the moment.
# So lets generate one for it to use
# TODO: use the kernel_Config directly
generate_autoconf(kernel_autoconf "kernel")
include_directories($<TARGET_PROPERTY:kernel_autoconf,INTERFACE_INCLUDE_DIRECTORIES>)
# Target for the config / autoconf headers. This is what all the other generated headers
# can depend upon
add_custom_target(
kernel_config_headers
DEPENDS
kernel_autoconf_Gen
kernel_autoconf
kernel_Config
kernel_Gen
)
# Target for all generated headers. We start with just all the config / autoconf headers
add_custom_target(kernel_headers DEPENDS kernel_config_headers)
# Build up a list of generated files. needed for dependencies in custom commands
get_generated_files(gen_files_list kernel_autoconf_Gen)
get_generated_files(gen_files2 kernel_Gen)
list(APPEND gen_files_list "${gen_files2}")
#
# C source generation
#
# Kernel compiles all C sources as a single C file, this provides
# rules for doing the concatenation
add_custom_command(
OUTPUT kernel_all.c
COMMAND
"${CPP_GEN_PATH}" ${c_sources} > kernel_all.c
DEPENDS "${CPP_GEN_PATH}" ${c_sources}
COMMENT "Concatenating C files"
VERBATIM
)
add_custom_target(kernel_all_c_wrapper DEPENDS kernel_all.c)
#
# Header Generation
#
# Rules for generating invocation and syscall headers
# Aside from generating file rules for dependencies this section will also produce a target
# that can be depended upon (along with the desired files themselves) to control parallelism
set(xml_headers "")
set(header_dest "gen_headers/arch/api/invocation.h")
gen_invocation_header(
OUTPUT ${header_dest}
XML
${CMAKE_CURRENT_SOURCE_DIR}/libsel4/arch_include/${KernelArch}/interfaces/object-api-arch.xml
ARCH
)
list(APPEND xml_headers "${header_dest}")
list(APPEND gen_files_list "${header_dest}")
set(header_dest "gen_headers/arch/api/sel4_invocation.h")
gen_invocation_header(
OUTPUT "${header_dest}"
XML
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/sel4_arch_include/${KernelSel4Arch}/interfaces/object-api-sel4-arch.xml"
SEL4ARCH
)
list(APPEND xml_headers "${header_dest}")
list(APPEND gen_files_list "${header_dest}")
set(header_dest "gen_headers/api/invocation.h")
gen_invocation_header(
OUTPUT "${header_dest}"
XML "${CMAKE_CURRENT_SOURCE_DIR}/libsel4/include/interfaces/object-api.xml"
)
list(APPEND xml_headers "${header_dest}")
list(APPEND gen_files_list "${header_dest}")
get_absolute_source_or_binary(
invocations_absolute "${CMAKE_CURRENT_SOURCE_DIR}/libsel4/include/interfaces/object-api.xml"
)
get_absolute_source_or_binary(
arch_invocations_absolute
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/arch_include/${KernelArch}/interfaces/object-api-arch.xml"
)
get_absolute_source_or_binary(
sel4_arch_invocations_absolute
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/sel4_arch_include/${KernelSel4Arch}/interfaces/object-api-sel4-arch.xml"
)
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/invocations_all.json
COMMAND rm -f ${CMAKE_CURRENT_BINARY_DIR}/generated/invocations_all.json
COMMAND
"${PYTHON3}" "${INVOCATION_JSON_GEN_PATH}"
--gen_config ${CMAKE_CURRENT_BINARY_DIR}/gen_config/kernel/gen_config.json
--invocations "${invocations_absolute}"
--arch_invocations "${arch_invocations_absolute}"
--sel4_arch_invocations "${sel4_arch_invocations_absolute}"
--dest ${CMAKE_CURRENT_BINARY_DIR}/generated/invocations_all.json
DEPENDS
"${CMAKE_CURRENT_BINARY_DIR}/gen_config/kernel/gen_config.json"
"${INVOCATION_JSON_GEN_PATH}"
"${invocations_absolute}"
"${arch_invocations_absolute}"
"${sel4_arch_invocations_absolute}"
)
list(APPEND gen_files_list "generated/invocations_all.json")
set(syscall_xml_base "${CMAKE_CURRENT_SOURCE_DIR}/libsel4/include/api")
set(syscall_dest "gen_headers/arch/api/syscall.h")
if(KernelIsMCS)
set(mcs --mcs)
endif()
add_custom_command(
OUTPUT ${syscall_dest}
COMMAND
"${XMLLINT_PATH}"
--noout
--schema "${syscall_xml_base}/syscall.xsd" "${syscall_xml_base}/syscall.xml"
COMMAND
${CMAKE_COMMAND} -E remove -f "${syscall_dest}"
COMMAND
${PYTHON3} "${SYSCALL_ID_GEN_PATH}"
--xml "${syscall_xml_base}/syscall.xml"
--kernel_header "${syscall_dest}" ${mcs}
DEPENDS
"${XMLLINT_PATH}"
"${SYSCALL_ID_GEN_PATH}"
"${syscall_xml_base}/syscall.xsd"
"${syscall_xml_base}/syscall.xml"
COMMENT "Generate syscall invocations"
VERBATIM
)
list(APPEND xml_headers "${syscall_dest}")
list(APPEND gen_files_list "${syscall_dest}")
# Construct target for just the xml headers
add_custom_target(xml_headers_target DEPENDS ${xml_headers})
# Add the xml headers to all the kernel headers
add_dependencies(kernel_headers xml_headers_target)
include_directories("${CMAKE_CURRENT_BINARY_DIR}/gen_headers")
#
# Prune list generation
#
# When generating bitfield files we can pass multiple '--prune' parameters that are source
# files that get searched for determing which bitfield functions are used. This allows the
# bitfield generator to only generate functions that are used. Whilst irrelevant for
# normal compilation, not generating unused functions has significant time savings for the
# automated verification tools
# To generate a prune file we 'build' the kernel (similar to the kernel_all_pp.c rule
# below) but strictly WITHOUT the generated header directory where the bitfield generated
# headers are. This means our preprocessed file will contain all the code used by the
# normal compilation, just without the bitfield headers (which we generate dummy versions of).
# If we allowed the bitfield headers to be included then we would have a circular
# dependency. As a result this rule comes *before* the Bitfield header generation section
set(dummy_headers "")
foreach(bf_dec ${bf_declarations})
string(
REPLACE
":"
";"
bf_dec
${bf_dec}
)
list(GET bf_dec 0 bf_file)
list(GET bf_dec 1 bf_gen_dir)
get_filename_component(bf_name "${bf_file}" NAME)
string(
REPLACE
".bf"
"_gen.h"
bf_target
"${bf_name}"
)
list(
APPEND
dummy_headers "${CMAKE_CURRENT_BINARY_DIR}/generated_prune/${bf_gen_dir}/${bf_target}"
)
endforeach()
add_custom_command(
OUTPUT ${dummy_headers}
COMMAND
${CMAKE_COMMAND} -E touch ${dummy_headers}
COMMENT "Generate dummy headers for prune compilation"
)
add_custom_target(dummy_header_wrapper DEPENDS ${dummy_headers})
cppfile(
kernel_all_pp_prune.c kernel_all_pp_prune_wrapper kernel_all.c
EXTRA_FLAGS -CC "-I${CMAKE_CURRENT_BINARY_DIR}/generated_prune"
EXTRA_DEPS
kernel_all_c_wrapper
dummy_header_wrapper
xml_headers_target
kernel_config_headers
${gen_files_list}
)
#
# Bitfield header generation
#
# Need to generate a bunch of unique targets, we'll do this with piano numbers
set(bf_gen_target "kernel_bf_gen_target_1")
foreach(bf_dec ${bf_declarations})
string(
REPLACE
":"
";"
bf_dec
${bf_dec}
)
list(GET bf_dec 0 bf_file)
list(GET bf_dec 1 bf_gen_dir)
get_filename_component(bf_name "${bf_file}" NAME)
string(
REPLACE
".bf"
"_gen.h"
bf_target
"${bf_name}"
)
string(
REPLACE
".bf"
"_defs.thy"
defs_target
"${bf_name}"
)
string(
REPLACE
".bf"
"_proofs.thy"
proofs_target
"${bf_name}"
)
set(pbf_name "generated/${bf_gen_dir}/${bf_name}.pbf")
set(pbf_target "${bf_gen_target}_pbf")
cppfile(
"${pbf_name}" "${pbf_target}" "${bf_file}"
EXTRA_FLAGS -P
EXTRA_DEPS kernel_config_headers ${gen_files_list}
)
GenHBFTarget(
""
${bf_gen_target}
"generated/${bf_gen_dir}/${bf_target}"
"${pbf_name}"
"${pbf_target}"
"kernel_all_pp_prune.c"
"kernel_all_pp_prune_wrapper"
"${bf_file}"
)
GenDefsBFTarget(
"${bf_gen_target}_def"
"generated/${bf_gen_dir}/${defs_target}"
"${pbf_name}"
"${pbf_target}"
"kernel_all_pp_prune.c"
"kernel_all_pp_prune_wrapper"
)
GenProofsBFTarget(
"${bf_gen_target}_proof"
"generated/${bf_gen_dir}/${proofs_target}"
"${pbf_name}"
"${pbf_target}"
"kernel_all_pp_prune.c"
"kernel_all_pp_prune_wrapper"
)
list(
APPEND
theories_deps
"${bf_gen_target}_def"
"${CMAKE_CURRENT_BINARY_DIR}/generated/${bf_gen_dir}/${defs_target}"
"${bf_gen_target}_proof"
"${CMAKE_CURRENT_BINARY_DIR}/generated/${bf_gen_dir}/${proofs_target}"
)
add_dependencies(kernel_headers "${bf_gen_target}")
list(APPEND gen_files_list "${CMAKE_CURRENT_BINARY_DIR}/generated/${bf_gen_dir}/${bf_target}")
set(bf_gen_target "${bf_gen_target}1")
endforeach()
# At this point we have generated a bunch of headers into ${CMAKE_CURRENT_BINARY_DIR}/generated
# but we do not pass this to include_directories, as that will cause it to be an include directory
# for *all* targets in this file (including ones we defined earlier) and the prune generation
# *must not* see this files and generate dependencies on them as this will result in nonsense.
# As such we must manually add this as an include directory to future targets
set(CPPExtraFlags "-I${CMAKE_CURRENT_BINARY_DIR}/generated")
#
# Kernel compilation
#
cppfile(
kernel_all.i kernel_i_wrapper kernel_all.c
EXTRA_DEPS kernel_all_c_wrapper kernel_headers ${gen_files_list}
EXTRA_FLAGS
-CC "${CPPExtraFlags}"
# The circular_includes script relies upon parsing out exactly 'kernel_all_copy.c' as
# a special case so we must ask cppfile to use this input name
EXACT_NAME kernel_all_copy.c
)
# Explain to cmake that our object file is actually a C input file
set_property(SOURCE kernel_all.i PROPERTY LANGUAGE C)
if(KernelArchARM)
set(linker_source "src/arch/arm/common_arm.lds")
elseif(KernelArchRiscV)
set(linker_source "src/arch/riscv/common_riscv.lds")
else()
set(linker_source "src/plat/${KernelPlatform}/linker.lds")
endif()
set(linker_lds_path "${CMAKE_CURRENT_BINARY_DIR}/linker.lds_pp")
# Preprocess the linker script
cppfile(
"${linker_lds_path}" linker_ld_wrapper "${linker_source}"
EXTRA_DEPS kernel_headers ${gen_files_list}
EXTRA_FLAGS -CC -P "${CPPExtraFlags}"
)
add_custom_command(
OUTPUT circular_includes_valid
COMMAND ${PYTHON3} ${CIRCULAR_INCLUDES} --ignore kernel_all_copy.c < kernel_all.i
COMMAND touch circular_includes_valid
DEPENDS kernel_i_wrapper kernel_all.i
)
add_custom_target(circular_includes DEPENDS circular_includes_valid)
add_custom_command(
OUTPUT kernel_all_pp.c
COMMAND
${CMAKE_COMMAND} -E copy kernel_all.i kernel_all_pp.c
DEPENDS kernel_i_wrapper kernel_all.i
)
add_custom_target(kernel_all_pp_wrapper DEPENDS kernel_all_pp.c)
add_custom_target(kernel_theories DEPENDS ${theories_deps})
# Declare final kernel output
add_executable(kernel.elf EXCLUDE_FROM_ALL ${asm_sources} kernel_all.c)
target_include_directories(kernel.elf PRIVATE ${config_dir})
target_include_directories(kernel.elf PRIVATE include)
target_include_directories(kernel.elf PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/generated")
target_link_libraries(kernel.elf PRIVATE kernel_Config kernel_autoconf)
set_property(TARGET kernel.elf APPEND_STRING PROPERTY LINK_FLAGS " -Wl,-T ${linker_lds_path} ")
set_target_properties(kernel.elf PROPERTIES LINK_DEPENDS "${linker_lds_path}")
add_dependencies(kernel.elf circular_includes)
# The following commands setup the install target for copying generated files and
# compilation outputs to an install location: CMAKE_INSTALL_PREFIX.
# CMAKE_INSTALL_PREFIX can be set on the cmake command line.
#
# The current installation outputs are:
# - ${CMAKE_INSTALL_PREFIX}/bin/kernel.elf: Location of kernel.elf binary
# - ${CMAKE_INSTALL_PREFIX}/libsel4/include: The include root for libsel4
# - ${CMAKE_INSTALL_PREFIX}/libsel4/src: The c source files for the libsel4 library
#
# The install target is only created if this is the top level project.
# We don't currently support creating install targets if the kernel is
# imported in another project.
if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
# Import libsel4 to get access to generation targets
add_subdirectory(libsel4)
# Add a default target that builds kernel.elf and generates all libsel4 headers
add_custom_target(single-project ALL DEPENDS sel4_generated kernel.elf)
# Disable the libsel4.a target as we don't intend to build the libsel4 sources
set_target_properties(sel4 PROPERTIES EXCLUDE_FROM_ALL ON)
# Install kernel.elf to bin/kernel.elf
install(TARGETS kernel.elf RUNTIME DESTINATION bin)
# Install all libsel4 headers to libsel4/include
# If building for aarch32,hyp explicitly use aarch32 for sel4arch path
# otherwise the install command tries to install the arm_hyp symlink file
# instead of its realpath.
set(realpath_sel4arch "${KernelSel4Arch}")
if(KernelSel4ArchArmHyp)
set(realpath_sel4arch "aarch32")
endif()
install(
DIRECTORY
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/include/"
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/arch_include/${KernelArch}/"
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/sel4_arch_include/${realpath_sel4arch}/"
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/sel4_plat_include/${KernelPlatform}/"
"${CMAKE_CURRENT_SOURCE_DIR}/libsel4/mode_include/${KernelWordSize}/"
"${CMAKE_CURRENT_BINARY_DIR}/libsel4/include/"
"${CMAKE_CURRENT_BINARY_DIR}/libsel4/arch_include/${KernelArch}/"
"${CMAKE_CURRENT_BINARY_DIR}/libsel4/sel4_arch_include/${realpath_sel4arch}/"
# The following directories install the autoconf headers
"${CMAKE_CURRENT_BINARY_DIR}/gen_config/"
"${CMAKE_CURRENT_BINARY_DIR}/libsel4/gen_config/"
"${CMAKE_CURRENT_BINARY_DIR}/libsel4/autoconf/"
DESTINATION libsel4/include
FILES_MATCHING
PATTERN "*.h"
PATTERN "*.pbf"
PATTERN "api/syscall.xml"
PATTERN "api/syscall.xsd"
PATTERN "object-api*.xml"
PATTERN "gen_config.json"
)
# Install libsel4 sources to libsel4/src
install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/libsel4/src/" DESTINATION libsel4/src)
# Install additional support files
if(DEFINED KernelDTBPath)
install(FILES ${KernelDTBPath} DESTINATION support)
endif()
if(DEFINED platform_yaml)
install(FILES ${platform_yaml} DESTINATION support)
endif()
if(DEFINED platform_json)
install(FILES ${platform_json} DESTINATION support)
endif()
endif()
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