mirror of
https://github.com/espressif/esp-idf.git
synced 2025-10-31 13:09:38 +00:00
375f969d43
It is now possible to have any alignment restriction on rodata in the user applicaiton. It will not affect the first section which must be aligned on a 16-byte bound. Closes https://github.com/espressif/esp-idf/issues/6719
65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
#!/usr/bin/env python
|
|
#
|
|
# Copyright 2020 Espressif Systems (Shanghai) PTE LTD
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
#
|
|
|
|
import argparse
|
|
import re
|
|
import subprocess
|
|
from typing import Tuple
|
|
|
|
argparser = argparse.ArgumentParser()
|
|
|
|
argparser.add_argument('readelf')
|
|
argparser.add_argument('elf')
|
|
|
|
args = argparser.parse_args()
|
|
|
|
# Get the content of the readelf command
|
|
contents = subprocess.check_output([args.readelf, '-S', args.elf]).decode()
|
|
|
|
|
|
# Define a class for readelf parsing error
|
|
class ParsingError(Exception):
|
|
pass
|
|
|
|
|
|
# Look for the start address and size of any section
|
|
def find_partition_info(sectionname): # type: (str) -> Tuple[int, int, int]
|
|
match = re.search(sectionname + r'\s+PROGBITS\s+([a-f0-9]+) [a-f0-9]+ ([a-f0-9]+) \d+\s+[A-Z]+ 0 0 (\d+)',
|
|
contents)
|
|
if not match:
|
|
raise ParsingError('ELF header parsing error')
|
|
# Return the address of the section, the size and the alignment
|
|
address = match.group(1)
|
|
size = match.group(2)
|
|
alignment = match.group(3)
|
|
return (int(address, 16), int(size, 16), int(alignment, 10))
|
|
|
|
|
|
# Get address and size for .flash.appdesc section
|
|
app_address, app_size, app_align = find_partition_info('.flash.appdesc')
|
|
|
|
# Same goes for .flash.rodata section
|
|
rodata_address, _, rodata_align = find_partition_info('.flash.rodata')
|
|
|
|
# Assert than everything is as expected:
|
|
# appdesc is aligned on 16
|
|
# rodata is aligned on 64
|
|
# appdesc ends where rodata starts
|
|
assert app_align == 16, '.flash.appdesc section should have been aligned on 16!'
|
|
assert rodata_align == 64, '.flash.rodata section should have been aligned on 64!'
|
|
assert app_address + app_size == rodata_address, ".flash.appdesc's end address and .flash.rodata's begin start must have no gap in between!"
|