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https://github.com/espressif/esp-idf.git
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dd849ffc26
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
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#
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# Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import argparse
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import re
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import subprocess
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from typing import Tuple
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argparser = argparse.ArgumentParser()
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argparser.add_argument('readelf')
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argparser.add_argument('elf')
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args = argparser.parse_args()
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# Get the content of the readelf command
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contents = subprocess.check_output([args.readelf, '-S', args.elf]).decode()
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# Define a class for readelf parsing error
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class ParsingError(Exception):
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pass
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# Look for the start address and size of any section
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def find_partition_info(sectionname): # type: (str) -> Tuple[int, int, int]
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match = re.search(sectionname + r'\s+PROGBITS\s+([a-f0-9]+) [a-f0-9]+ ([a-f0-9]+) \d+\s+[A-Z]+ 0 0 (\d+)',
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contents)
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if not match:
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raise ParsingError('ELF header parsing error')
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# Return the address of the section, the size and the alignment
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address = match.group(1)
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size = match.group(2)
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alignment = match.group(3)
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return (int(address, 16), int(size, 16), int(alignment, 10))
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# Get address and size for .flash.appdesc section
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app_address, app_size, app_align = find_partition_info('.flash.appdesc')
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# Same goes for .flash.rodata section
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rodata_address, _, rodata_align = find_partition_info('.flash.rodata')
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# Assert than everything is as expected:
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# appdesc is aligned on 16
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# rodata is aligned on 64
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# appdesc ends where rodata starts
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assert app_align == 16, '.flash.appdesc section should have been aligned on 16!'
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assert rodata_align == 64, '.flash.rodata section should have been aligned on 64!'
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assert app_address + app_size == rodata_address, ".flash.appdesc's end address and .flash.rodata's begin start must have no gap in between!"
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