blob: 4957b5fd2e0f90524d6b69e10ebb9ce2023c6fef [file] [log] [blame]
# SPDX-License-Identifier: Apache-2.0
set_property(TARGET linker PROPERTY devices_start_symbol "__device_start")
if(DEFINED TOOLCHAIN_HOME)
# When Toolchain home is defined, then we are cross-compiling, so only look
# for linker in that path, else we are using host tools.
set(LD_SEARCH_PATH PATHS ${TOOLCHAIN_HOME} NO_DEFAULT_PATH)
endif()
find_program(CMAKE_LINKER ${CROSS_COMPILE}ld.bfd ${LD_SEARCH_PATH})
if(NOT CMAKE_LINKER)
find_program(CMAKE_LINKER ${CROSS_COMPILE}ld ${LD_SEARCH_PATH})
endif()
set_ifndef(LINKERFLAGPREFIX -Wl)
if(NOT "${ZEPHYR_TOOLCHAIN_VARIANT}" STREQUAL "host")
if(CONFIG_EXCEPTIONS)
# When building with C++ Exceptions, it is important that crtbegin and crtend
# are linked at specific locations.
# The location is so important that we cannot let this be controlled by normal
# link libraries, instead we must control the link command specifically as
# part of toolchain.
set(CMAKE_CXX_LINK_EXECUTABLE
"<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> ${LIBGCC_DIR}/crtbegin.o <OBJECTS> -o <TARGET> <LINK_LIBRARIES> ${LIBGCC_DIR}/crtend.o")
endif()
endif()
# Run $LINKER_SCRIPT file through the C preprocessor, producing ${linker_script_gen}
# NOTE: ${linker_script_gen} will be produced at build-time; not at configure-time
macro(configure_linker_script linker_script_gen linker_pass_define)
set(extra_dependencies ${ARGN})
if(CONFIG_CMAKE_LINKER_GENERATOR)
add_custom_command(
OUTPUT ${linker_script_gen}
COMMAND ${CMAKE_COMMAND}
-DPASS="${linker_pass_define}"
-DFORMAT="$<TARGET_PROPERTY:linker,FORMAT>"
-DENTRY="$<TARGET_PROPERTY:linker,ENTRY>"
-DMEMORY_REGIONS="$<TARGET_PROPERTY:linker,MEMORY_REGIONS>"
-DGROUPS="$<TARGET_PROPERTY:linker,GROUPS>"
-DSECTIONS="$<TARGET_PROPERTY:linker,SECTIONS>"
-DSECTION_SETTINGS="$<TARGET_PROPERTY:linker,SECTION_SETTINGS>"
-DSYMBOLS="$<TARGET_PROPERTY:linker,SYMBOLS>"
-DOUT_FILE=${CMAKE_CURRENT_BINARY_DIR}/${linker_script_gen}
-P ${ZEPHYR_BASE}/cmake/linker/ld/ld_script.cmake
)
else()
set(template_script_defines ${linker_pass_define})
list(TRANSFORM template_script_defines PREPEND "-D")
# Only Ninja and Makefile generators support DEPFILE.
if((CMAKE_GENERATOR STREQUAL "Ninja")
OR (CMAKE_GENERATOR MATCHES "Makefiles")
)
set(linker_script_dep DEPFILE ${PROJECT_BINARY_DIR}/${linker_script_gen}.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()
zephyr_get_include_directories_for_lang(C current_includes)
get_property(current_defines GLOBAL PROPERTY PROPERTY_LINKER_SCRIPT_DEFINES)
if("${SPARSE}" STREQUAL "y")
set(ld_command ${REAL_CC})
else()
set(ld_command ${CMAKE_C_COMPILER})
endif()
add_custom_command(
OUTPUT ${linker_script_gen}
DEPENDS
${LINKER_SCRIPT}
${AUTOCONF_H}
${extra_dependencies}
# NB: 'linker_script_dep' will use a keyword that ends 'DEPENDS'
${linker_script_dep}
COMMAND ${ld_command}
-x assembler-with-cpp
${NOSYSDEF_CFLAG}
-MD -MF ${linker_script_gen}.dep -MT ${linker_script_gen}
-D_LINKER
-D_ASMLANGUAGE
-imacros ${AUTOCONF_H}
${current_includes}
${current_defines}
${template_script_defines}
-E ${LINKER_SCRIPT}
-P # Prevent generation of debug `#line' directives.
-o ${linker_script_gen}
VERBATIM
WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
COMMAND_EXPAND_LISTS
)
endif()
endmacro()
# Force symbols to be entered in the output file as undefined symbols
function(toolchain_ld_force_undefined_symbols)
foreach(symbol ${ARGN})
zephyr_link_libraries(${LINKERFLAGPREFIX},-u,${symbol})
endforeach()
endfunction()
# Link a target to given libraries with toolchain-specific argument order
#
# Usage:
# toolchain_ld_link_elf(
# TARGET_ELF <target_elf>
# OUTPUT_MAP <output_map_file_of_target>
# LIBRARIES_PRE_SCRIPT [libraries_pre_script]
# LINKER_SCRIPT <linker_script>
# LIBRARIES_POST_SCRIPT [libraries_post_script]
# DEPENDENCIES [dependencies]
# )
function(toolchain_ld_link_elf)
cmake_parse_arguments(
TOOLCHAIN_LD_LINK_ELF # prefix of output variables
"" # list of names of the boolean arguments
"TARGET_ELF;OUTPUT_MAP;LINKER_SCRIPT" # list of names of scalar arguments
"LIBRARIES_PRE_SCRIPT;LIBRARIES_POST_SCRIPT;DEPENDENCIES" # list of names of list arguments
${ARGN} # input args to parse
)
if(${CMAKE_LINKER} STREQUAL "${CROSS_COMPILE}ld.bfd")
# ld.bfd was found so let's explicitly use that for linking, see #32237
set(use_linker "-fuse-ld=bfd")
endif()
target_link_libraries(
${TOOLCHAIN_LD_LINK_ELF_TARGET_ELF}
${TOOLCHAIN_LD_LINK_ELF_LIBRARIES_PRE_SCRIPT}
${use_linker}
${TOPT}
${TOOLCHAIN_LD_LINK_ELF_LINKER_SCRIPT}
${TOOLCHAIN_LD_LINK_ELF_LIBRARIES_POST_SCRIPT}
${LINKERFLAGPREFIX},-Map=${TOOLCHAIN_LD_LINK_ELF_OUTPUT_MAP}
${LINKERFLAGPREFIX},--whole-archive
${ZEPHYR_LIBS_PROPERTY}
${LINKERFLAGPREFIX},--no-whole-archive
kernel
$<TARGET_OBJECTS:${OFFSETS_LIB}>
${LIB_INCLUDE_DIR}
-L${PROJECT_BINARY_DIR}
${TOOLCHAIN_LIBS}
${TOOLCHAIN_LD_LINK_ELF_DEPENDENCIES}
)
endfunction(toolchain_ld_link_elf)
# Load toolchain_ld-family macros
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/target_base.cmake)
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/target_baremetal.cmake)
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/target_cpp.cmake)
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/target_relocation.cmake)
include(${ZEPHYR_BASE}/cmake/linker/${LINKER}/target_configure.cmake)