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cmake: support ELF image adjustment

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This commit adds support for adjust the addresses of the final image.
This is useful when the image is to be flashed at a location different
from the LMA address encoded in the ELF file by the linker.

An example use-case is multicore systems where core A might load image
from a flash partition into RAM in order for core B to execute and load,
but where the image itself is build with the RAM addresses as LMA.

It updates the zephyr_image_info.h header with information of adjustment
value.

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
This commit is contained in:
Torsten Rasmussen 2022-01-12 14:21:07 +01:00 • committed by Christopher Friedt
commit d51a67b7c0
4 changed files with 45 additions and 2 deletions
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13
CMakeLists.txt
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@ -1393,6 +1393,18 @@ if(CONFIG_OUTPUT_PRINT_MEMORY_USAGE)
endif()
endif()
if(CONFIG_BUILD_OUTPUT_ADJUST_LMA)
math(EXPR adjustment "${CONFIG_BUILD_OUTPUT_ADJUST_LMA}" OUTPUT_FORMAT DECIMAL)
list(APPEND
post_build_commands
COMMAND $<TARGET_PROPERTY:bintools,elfconvert_command>
$<TARGET_PROPERTY:bintools,elfconvert_flag_final>
$<TARGET_PROPERTY:bintools,elfconvert_flag_lma_adjust>${adjustment}
$<TARGET_PROPERTY:bintools,elfconvert_flag_infile>${KERNEL_ELF_NAME}
$<TARGET_PROPERTY:bintools,elfconvert_flag_outfile>${KERNEL_ELF_NAME}
)
endif()
if(CONFIG_BUILD_OUTPUT_HEX OR BOARD_FLASH_RUNNER STREQUAL openocd)
get_property(elfconvert_formats TARGET bintools PROPERTY elfconvert_formats)
if(ihex IN_LIST elfconvert_formats)
@ -1582,6 +1594,7 @@ if(CONFIG_BUILD_OUTPUT_INFO_HEADER)
COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/scripts/gen_image_info.py
--elf-file=${KERNEL_ELF_NAME}
--header-file=${PROJECT_BINARY_DIR}/include/public/zephyr_image_info.h
$<$<BOOL:${adjustment}>:--adjusted-lma=${adjustment}>
)
list(APPEND
post_build_byproducts