cmake: support ELF image adjustment
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>
diff --git a/scripts/gen_image_info.py b/scripts/gen_image_info.py
index aad71b1..758c0b8 100644
--- a/scripts/gen_image_info.py
+++ b/scripts/gen_image_info.py
@@ -16,6 +16,7 @@
- Number of segments in the image
- LMA address of each segment
- VMA address of each segment
+- LMA adjusted of each segment if the LMA addresses has been adjusted after linking
- Size of each segment
'''
@@ -23,7 +24,7 @@
from elftools.elf.elffile import ELFFile
-def write_header(filename, segments):
+def write_header(filename, segments, adjusted_lma):
content = []
filename_we = filename.split('.h')[0].upper()
@@ -31,6 +32,7 @@
content.append(f'#define {filename_we}_H')
content.append(f'')
content.append(f'#define SEGMENT_NUM {len(segments)}')
+ content.append(f'#define ADJUSTED_LMA {adjusted_lma}')
for idx, segment in enumerate(segments):
segment_header = segment['segment'].header
@@ -69,10 +71,12 @@
help="""Header file to write with image data.""")
parser.add_argument('--elf-file', required=True,
help="""ELF File to process.""")
+ parser.add_argument('--adjusted-lma', required=False, default=0,
+ help="""Adjusted LMA address value.""")
args = parser.parse_args()
segments = read_segments(args.elf_file)
- write_header(args.header_file, segments)
+ write_header(args.header_file, segments, args.adjusted_lma)
if __name__ == "__main__":
