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scripts: gen_relocate_app.py: add custom align size for relocation

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add custom align size for code relocation to reduce alignment memory
wasting.

Fixes: #17337.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
This commit is contained in:
Wentong Wu 2019-09-19 21:40:29 +08:00 • committed by Anas Nashif
commit 09af98aba9
1 changed files with 17 additions and 1 deletions
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18
scripts/gen_relocate_app.py
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@ -84,7 +84,11 @@ LINKER_SECTION_SEQ_MPU = """
{{
__{0}_{1}_start = .;
{4}
#if {6}
. = ALIGN({6});
#else
MPU_ALIGN(__{0}_{1}_size);
#endif
__{0}_{1}_end = .;
}} {5}
__{0}_{1}_size = __{0}_{1}_end - __{0}_{1}_start;
@ -187,6 +191,12 @@ def assign_to_correct_mem_region(memory_type,
iteration_sections["text"] or iteration_sections["rodata"]):
all_regions = True
pos = memory_type.find('_')
if pos in range(len(memory_type)):
align_size = int(memory_type[pos+1:])
memory_type = memory_type[:pos]
mpu_align[memory_type] = align_size
if memory_type in complete_list_of_sections:
for iter_sec in ["text", "rodata", "data", "bss"]:
if ((iteration_sections[iter_sec] or all_regions) and
@ -229,8 +239,12 @@ def string_create_helper(region, memory_type,
linker_string += tmp
else:
if memory_type != 'SRAM' and region == 'rodata':
align_size = 0
if memory_type in mpu_align.keys():
align_size = mpu_align[memory_type]
linker_string += LINKER_SECTION_SEQ_MPU.format(memory_type.lower(), region, memory_type.upper(),
region.upper(), tmp, load_address_string)
region.upper(), tmp, load_address_string, align_size)
else:
linker_string += LINKER_SECTION_SEQ.format(memory_type.lower(), region, memory_type.upper(),
region.upper(), tmp, load_address_string)
@ -389,6 +403,8 @@ def create_dict_wrt_mem():
def main():
global mpu_align
mpu_align = {}
parse_args()
searchpath = args.directory
linker_file = args.output