596 lines
22 KiB
Python
596 lines
22 KiB
Python
#!/usr/bin/env python3
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#
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# ESP32 partition table generation tool
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#
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# Converts partition tables to/from CSV and binary formats.
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#
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# See https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/partition-tables.html
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# for explanation of partition table structure and uses.
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#
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# SPDX-FileCopyrightText: 2016-2021 Espressif Systems (Shanghai) CO LTD
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# SPDX-License-Identifier: Apache-2.0
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from __future__ import division, print_function, unicode_literals
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import argparse
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import binascii
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import errno
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import hashlib
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import os
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import re
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import struct
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import sys
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MAX_PARTITION_LENGTH = 0xC00 # 3K for partition data (96 entries) leaves 1K in a 4K sector for signature
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MD5_PARTITION_BEGIN = b'\xEB\xEB' + b'\xFF' * 14 # The first 2 bytes are like magic numbers for MD5 sum
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PARTITION_TABLE_SIZE = 0x1000 # Size of partition table
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MIN_PARTITION_SUBTYPE_APP_OTA = 0x10
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NUM_PARTITION_SUBTYPE_APP_OTA = 16
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__version__ = '1.2'
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APP_TYPE = 0x00
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DATA_TYPE = 0x01
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TYPES = {
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'app': APP_TYPE,
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'data': DATA_TYPE,
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}
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def get_ptype_as_int(ptype):
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""" Convert a string which might be numeric or the name of a partition type to an integer """
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try:
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return TYPES[ptype]
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except KeyError:
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try:
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return int(ptype, 0)
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except TypeError:
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return ptype
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# Keep this map in sync with esp_partition_subtype_t enum in esp_partition.h
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SUBTYPES = {
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APP_TYPE: {
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'factory': 0x00,
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'test': 0x20,
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},
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DATA_TYPE: {
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'ota': 0x00,
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'phy': 0x01,
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'nvs': 0x02,
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'coredump': 0x03,
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'nvs_keys': 0x04,
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'efuse': 0x05,
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'undefined': 0x06,
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'esphttpd': 0x80,
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'fat': 0x81,
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'spiffs': 0x82,
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},
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}
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def get_subtype_as_int(ptype, subtype):
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""" Convert a string which might be numeric or the name of a partition subtype to an integer """
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try:
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return SUBTYPES[get_ptype_as_int(ptype)][subtype]
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except KeyError:
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try:
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return int(subtype, 0)
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except TypeError:
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return subtype
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ALIGNMENT = {
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APP_TYPE: 0x10000,
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DATA_TYPE: 0x1000,
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}
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def get_alignment_for_type(ptype):
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return ALIGNMENT.get(ptype, ALIGNMENT[DATA_TYPE])
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def get_partition_type(ptype):
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if ptype == 'app':
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return APP_TYPE
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if ptype == 'data':
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return DATA_TYPE
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raise InputError('Invalid partition type')
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def add_extra_subtypes(csv):
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for line_no in csv:
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try:
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fields = [line.strip() for line in line_no.split(',')]
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for subtype, subtype_values in SUBTYPES.items():
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if (int(fields[2], 16) in subtype_values.values() and subtype == get_partition_type(fields[0])):
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raise ValueError('Found duplicate value in partition subtype')
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SUBTYPES[TYPES[fields[0]]][fields[1]] = int(fields[2], 16)
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except InputError as err:
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raise InputError('Error parsing custom subtypes: %s' % err)
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quiet = False
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md5sum = True
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secure = False
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offset_part_table = 0
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def status(msg):
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""" Print status message to stderr """
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if not quiet:
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critical(msg)
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def critical(msg):
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""" Print critical message to stderr """
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sys.stderr.write(msg)
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sys.stderr.write('\n')
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class PartitionTable(list):
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def __init__(self):
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super(PartitionTable, self).__init__(self)
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@classmethod
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def from_file(cls, f):
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data = f.read()
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data_is_binary = data[0:2] == PartitionDefinition.MAGIC_BYTES
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if data_is_binary:
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status('Parsing binary partition input...')
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return cls.from_binary(data), True
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data = data.decode()
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status('Parsing CSV input...')
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return cls.from_csv(data), False
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@classmethod
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def from_csv(cls, csv_contents):
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res = PartitionTable()
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lines = csv_contents.splitlines()
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def expand_vars(f):
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f = os.path.expandvars(f)
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m = re.match(r'(?<!\\)\$([A-Za-z_][A-Za-z0-9_]*)', f)
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if m:
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raise InputError("unknown variable '%s'" % m.group(1))
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return f
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for line_no in range(len(lines)):
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line = expand_vars(lines[line_no]).strip()
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if line.startswith('#') or len(line) == 0:
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continue
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try:
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res.append(PartitionDefinition.from_csv(line, line_no + 1))
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except InputError as err:
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raise InputError('Error at line %d: %s\nPlease check extra_partition_subtypes.inc file in build/config directory' % (line_no + 1, err))
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except Exception:
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critical('Unexpected error parsing CSV line %d: %s' % (line_no + 1, line))
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raise
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# fix up missing offsets & negative sizes
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last_end = offset_part_table + PARTITION_TABLE_SIZE # first offset after partition table
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for e in res:
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if e.offset is not None and e.offset < last_end:
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if e == res[0]:
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raise InputError('CSV Error at line %d: Partitions overlap. Partition sets offset 0x%x. '
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'But partition table occupies the whole sector 0x%x. '
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'Use a free offset 0x%x or higher.'
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% (e.line_no, e.offset, offset_part_table, last_end))
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else:
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raise InputError('CSV Error at line %d: Partitions overlap. Partition sets offset 0x%x. Previous partition ends 0x%x'
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% (e.line_no, e.offset, last_end))
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if e.offset is None:
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pad_to = get_alignment_for_type(e.type)
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if last_end % pad_to != 0:
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last_end += pad_to - (last_end % pad_to)
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e.offset = last_end
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if e.size < 0:
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e.size = -e.size - e.offset
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last_end = e.offset + e.size
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return res
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def __getitem__(self, item):
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""" Allow partition table access via name as well as by
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numeric index. """
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if isinstance(item, str):
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for x in self:
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if x.name == item:
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return x
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raise ValueError("No partition entry named '%s'" % item)
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else:
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return super(PartitionTable, self).__getitem__(item)
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def find_by_type(self, ptype, subtype):
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""" Return a partition by type & subtype, returns
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None if not found """
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# convert ptype & subtypes names (if supplied this way) to integer values
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ptype = get_ptype_as_int(ptype)
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subtype = get_subtype_as_int(ptype, subtype)
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for p in self:
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if p.type == ptype and p.subtype == subtype:
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yield p
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return
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def find_by_name(self, name):
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for p in self:
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if p.name == name:
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return p
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return None
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def verify(self):
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# verify each partition individually
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for p in self:
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p.verify()
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# check on duplicate name
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names = [p.name for p in self]
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duplicates = set(n for n in names if names.count(n) > 1)
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# print sorted duplicate partitions by name
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if len(duplicates) != 0:
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critical('A list of partitions that have the same name:')
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for p in sorted(self, key=lambda x:x.name):
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if len(duplicates.intersection([p.name])) != 0:
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critical('%s' % (p.to_csv()))
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raise InputError('Partition names must be unique')
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# check for overlaps
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last = None
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for p in sorted(self, key=lambda x:x.offset):
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if p.offset < offset_part_table + PARTITION_TABLE_SIZE:
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raise InputError('Partition offset 0x%x is below 0x%x' % (p.offset, offset_part_table + PARTITION_TABLE_SIZE))
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if last is not None and p.offset < last.offset + last.size:
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raise InputError('Partition at 0x%x overlaps 0x%x-0x%x' % (p.offset, last.offset, last.offset + last.size - 1))
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last = p
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# check that otadata should be unique
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otadata_duplicates = [p for p in self if p.type == TYPES['data'] and p.subtype == SUBTYPES[DATA_TYPE]['ota']]
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if len(otadata_duplicates) > 1:
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for p in otadata_duplicates:
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critical('%s' % (p.to_csv()))
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raise InputError('Found multiple otadata partitions. Only one partition can be defined with type="data"(1) and subtype="ota"(0).')
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if len(otadata_duplicates) == 1 and otadata_duplicates[0].size != 0x2000:
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p = otadata_duplicates[0]
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critical('%s' % (p.to_csv()))
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raise InputError('otadata partition must have size = 0x2000')
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def flash_size(self):
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""" Return the size that partitions will occupy in flash
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(ie the offset the last partition ends at)
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"""
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try:
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last = sorted(self, reverse=True)[0]
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except IndexError:
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return 0 # empty table!
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return last.offset + last.size
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def verify_size_fits(self, flash_size_bytes: int) -> None:
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""" Check that partition table fits into the given flash size.
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Raises InputError otherwise.
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"""
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table_size = self.flash_size()
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if flash_size_bytes < table_size:
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mb = 1024 * 1024
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raise InputError('Partitions tables occupies %.1fMB of flash (%d bytes) which does not fit in configured '
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"flash size %dMB. Change the flash size in menuconfig under the 'Serial Flasher Config' menu." %
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(table_size / mb, table_size, flash_size_bytes / mb))
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@classmethod
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def from_binary(cls, b):
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md5 = hashlib.md5()
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result = cls()
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for o in range(0,len(b),32):
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data = b[o:o + 32]
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if len(data) != 32:
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raise InputError('Partition table length must be a multiple of 32 bytes')
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if data == b'\xFF' * 32:
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return result # got end marker
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if md5sum and data[:2] == MD5_PARTITION_BEGIN[:2]: # check only the magic number part
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if data[16:] == md5.digest():
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continue # the next iteration will check for the end marker
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else:
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raise InputError("MD5 checksums don't match! (computed: 0x%s, parsed: 0x%s)" % (md5.hexdigest(), binascii.hexlify(data[16:])))
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else:
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md5.update(data)
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result.append(PartitionDefinition.from_binary(data))
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raise InputError('Partition table is missing an end-of-table marker')
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def to_binary(self):
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result = b''.join(e.to_binary() for e in self)
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if md5sum:
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result += MD5_PARTITION_BEGIN + hashlib.md5(result).digest()
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if len(result) >= MAX_PARTITION_LENGTH:
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raise InputError('Binary partition table length (%d) longer than max' % len(result))
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result += b'\xFF' * (MAX_PARTITION_LENGTH - len(result)) # pad the sector, for signing
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return result
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def to_csv(self, simple_formatting=False):
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rows = ['# ESP-IDF Partition Table',
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'# Name, Type, SubType, Offset, Size, Flags']
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rows += [x.to_csv(simple_formatting) for x in self]
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return '\n'.join(rows) + '\n'
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class PartitionDefinition(object):
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MAGIC_BYTES = b'\xAA\x50'
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# dictionary maps flag name (as used in CSV flags list, property name)
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# to bit set in flags words in binary format
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FLAGS = {
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'encrypted': 0
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}
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# add subtypes for the 16 OTA slot values ("ota_XX, etc.")
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for ota_slot in range(NUM_PARTITION_SUBTYPE_APP_OTA):
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SUBTYPES[TYPES['app']]['ota_%d' % ota_slot] = MIN_PARTITION_SUBTYPE_APP_OTA + ota_slot
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def __init__(self):
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self.name = ''
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self.type = None
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self.subtype = None
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self.offset = None
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self.size = None
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self.encrypted = False
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@classmethod
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def from_csv(cls, line, line_no):
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""" Parse a line from the CSV """
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line_w_defaults = line + ',,,,' # lazy way to support default fields
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fields = [f.strip() for f in line_w_defaults.split(',')]
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res = PartitionDefinition()
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res.line_no = line_no
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res.name = fields[0]
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res.type = res.parse_type(fields[1])
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res.subtype = res.parse_subtype(fields[2])
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res.offset = res.parse_address(fields[3])
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res.size = res.parse_address(fields[4])
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if res.size is None:
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raise InputError("Size field can't be empty")
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flags = fields[5].split(':')
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for flag in flags:
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if flag in cls.FLAGS:
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setattr(res, flag, True)
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elif len(flag) > 0:
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raise InputError("CSV flag column contains unknown flag '%s'" % (flag))
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return res
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def __eq__(self, other):
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return self.name == other.name and self.type == other.type \
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and self.subtype == other.subtype and self.offset == other.offset \
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and self.size == other.size
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def __repr__(self):
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def maybe_hex(x):
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return '0x%x' % x if x is not None else 'None'
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return "PartitionDefinition('%s', 0x%x, 0x%x, %s, %s)" % (self.name, self.type, self.subtype or 0,
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maybe_hex(self.offset), maybe_hex(self.size))
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def __str__(self):
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return "Part '%s' %d/%d @ 0x%x size 0x%x" % (self.name, self.type, self.subtype, self.offset or -1, self.size or -1)
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def __cmp__(self, other):
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return self.offset - other.offset
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def __lt__(self, other):
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return self.offset < other.offset
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def __gt__(self, other):
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return self.offset > other.offset
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def __le__(self, other):
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return self.offset <= other.offset
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def __ge__(self, other):
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return self.offset >= other.offset
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def parse_type(self, strval):
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if strval == '':
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raise InputError("Field 'type' can't be left empty.")
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return parse_int(strval, TYPES)
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def parse_subtype(self, strval):
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if strval == '':
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if self.type == TYPES['app']:
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raise InputError('App partition cannot have an empty subtype')
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return SUBTYPES[DATA_TYPE]['undefined']
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return parse_int(strval, SUBTYPES.get(self.type, {}))
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def parse_address(self, strval):
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if strval == '':
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return None # PartitionTable will fill in default
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return parse_int(strval)
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def verify(self):
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if self.type is None:
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raise ValidationError(self, 'Type field is not set')
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if self.subtype is None:
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raise ValidationError(self, 'Subtype field is not set')
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if self.offset is None:
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raise ValidationError(self, 'Offset field is not set')
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align = get_alignment_for_type(self.type)
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if self.offset % align:
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raise ValidationError(self, 'Offset 0x%x is not aligned to 0x%x' % (self.offset, align))
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if self.size % align and secure and self.type == APP_TYPE:
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raise ValidationError(self, 'Size 0x%x is not aligned to 0x%x' % (self.size, align))
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if self.size is None:
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raise ValidationError(self, 'Size field is not set')
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if self.name in TYPES and TYPES.get(self.name, '') != self.type:
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critical("WARNING: Partition has name '%s' which is a partition type, but does not match this partition's "
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'type (0x%x). Mistake in partition table?' % (self.name, self.type))
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all_subtype_names = []
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for names in (t.keys() for t in SUBTYPES.values()):
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all_subtype_names += names
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if self.name in all_subtype_names and SUBTYPES.get(self.type, {}).get(self.name, '') != self.subtype:
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critical("WARNING: Partition has name '%s' which is a partition subtype, but this partition has "
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'non-matching type 0x%x and subtype 0x%x. Mistake in partition table?' % (self.name, self.type, self.subtype))
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STRUCT_FORMAT = b'<2sBBLL16sL'
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@classmethod
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def from_binary(cls, b):
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if len(b) != 32:
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raise InputError('Partition definition length must be exactly 32 bytes. Got %d bytes.' % len(b))
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res = cls()
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(magic, res.type, res.subtype, res.offset,
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res.size, res.name, flags) = struct.unpack(cls.STRUCT_FORMAT, b)
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if b'\x00' in res.name: # strip null byte padding from name string
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res.name = res.name[:res.name.index(b'\x00')]
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res.name = res.name.decode()
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if magic != cls.MAGIC_BYTES:
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raise InputError('Invalid magic bytes (%r) for partition definition' % magic)
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for flag,bit in cls.FLAGS.items():
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if flags & (1 << bit):
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setattr(res, flag, True)
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flags &= ~(1 << bit)
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if flags != 0:
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critical('WARNING: Partition definition had unknown flag(s) 0x%08x. Newer binary format?' % flags)
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return res
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def get_flags_list(self):
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return [flag for flag in self.FLAGS.keys() if getattr(self, flag)]
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def to_binary(self):
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flags = sum((1 << self.FLAGS[flag]) for flag in self.get_flags_list())
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return struct.pack(self.STRUCT_FORMAT,
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self.MAGIC_BYTES,
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self.type, self.subtype,
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self.offset, self.size,
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self.name.encode(),
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flags)
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def to_csv(self, simple_formatting=False):
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def addr_format(a, include_sizes):
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if not simple_formatting and include_sizes:
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for (val, suffix) in [(0x100000, 'M'), (0x400, 'K')]:
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if a % val == 0:
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return '%d%s' % (a // val, suffix)
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return '0x%x' % a
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def lookup_keyword(t, keywords):
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for k,v in keywords.items():
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if simple_formatting is False and t == v:
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return k
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|
return '%d' % t
|
|
|
|
def generate_text_flags():
|
|
""" colon-delimited list of flags """
|
|
return ':'.join(self.get_flags_list())
|
|
|
|
return ','.join([self.name,
|
|
lookup_keyword(self.type, TYPES),
|
|
lookup_keyword(self.subtype, SUBTYPES.get(self.type, {})),
|
|
addr_format(self.offset, False),
|
|
addr_format(self.size, True),
|
|
generate_text_flags()])
|
|
|
|
|
|
def parse_int(v, keywords={}):
|
|
"""Generic parser for integer fields - int(x,0) with provision for
|
|
k/m/K/M suffixes and 'keyword' value lookup.
|
|
"""
|
|
try:
|
|
for letter, multiplier in [('k', 1024), ('m', 1024 * 1024)]:
|
|
if v.lower().endswith(letter):
|
|
return parse_int(v[:-1], keywords) * multiplier
|
|
return int(v, 0)
|
|
except ValueError:
|
|
if len(keywords) == 0:
|
|
raise InputError('Invalid field value %s' % v)
|
|
try:
|
|
return keywords[v.lower()]
|
|
except KeyError:
|
|
raise InputError("Value '%s' is not valid. Known keywords: %s" % (v, ', '.join(keywords)))
|
|
|
|
|
|
def main():
|
|
global quiet
|
|
global md5sum
|
|
global offset_part_table
|
|
global secure
|
|
parser = argparse.ArgumentParser(description='ESP32 partition table utility')
|
|
|
|
parser.add_argument('--flash-size', help='Optional flash size limit, checks partition table fits in flash',
|
|
nargs='?', choices=['1MB', '2MB', '4MB', '8MB', '16MB', '32MB', '64MB', '128MB'])
|
|
parser.add_argument('--disable-md5sum', help='Disable md5 checksum for the partition table', default=False, action='store_true')
|
|
parser.add_argument('--no-verify', help="Don't verify partition table fields", action='store_true')
|
|
parser.add_argument('--verify', '-v', help='Verify partition table fields (deprecated, this behaviour is '
|
|
'enabled by default and this flag does nothing.', action='store_true')
|
|
parser.add_argument('--quiet', '-q', help="Don't print non-critical status messages to stderr", action='store_true')
|
|
parser.add_argument('--offset', '-o', help='Set offset partition table', default='0x8000')
|
|
parser.add_argument('--secure', help='Require app partitions to be suitable for secure boot', action='store_true')
|
|
parser.add_argument('--extra-partition-subtypes', help='Extra partition subtype entries', nargs='*')
|
|
parser.add_argument('input', help='Path to CSV or binary file to parse.', type=argparse.FileType('rb'))
|
|
parser.add_argument('output', help='Path to output converted binary or CSV file. Will use stdout if omitted.',
|
|
nargs='?', default='-')
|
|
|
|
args = parser.parse_args()
|
|
|
|
quiet = args.quiet
|
|
md5sum = not args.disable_md5sum
|
|
secure = args.secure
|
|
offset_part_table = int(args.offset, 0)
|
|
if args.extra_partition_subtypes:
|
|
add_extra_subtypes(args.extra_partition_subtypes)
|
|
|
|
table, input_is_binary = PartitionTable.from_file(args.input)
|
|
|
|
if not args.no_verify:
|
|
status('Verifying table...')
|
|
table.verify()
|
|
|
|
if args.flash_size:
|
|
size_mb = int(args.flash_size.replace('MB', ''))
|
|
table.verify_size_fits(size_mb * 1024 * 1024)
|
|
|
|
# Make sure that the output directory is created
|
|
output_dir = os.path.abspath(os.path.dirname(args.output))
|
|
|
|
if not os.path.exists(output_dir):
|
|
try:
|
|
os.makedirs(output_dir)
|
|
except OSError as exc:
|
|
if exc.errno != errno.EEXIST:
|
|
raise
|
|
|
|
if input_is_binary:
|
|
output = table.to_csv()
|
|
with sys.stdout if args.output == '-' else open(args.output, 'w') as f:
|
|
f.write(output)
|
|
else:
|
|
output = table.to_binary()
|
|
try:
|
|
stdout_binary = sys.stdout.buffer # Python 3
|
|
except AttributeError:
|
|
stdout_binary = sys.stdout
|
|
with stdout_binary if args.output == '-' else open(args.output, 'wb') as f:
|
|
f.write(output)
|
|
|
|
|
|
class InputError(RuntimeError):
|
|
def __init__(self, e):
|
|
super(InputError, self).__init__(e)
|
|
|
|
|
|
class ValidationError(InputError):
|
|
def __init__(self, partition, message):
|
|
super(ValidationError, self).__init__(
|
|
'Partition %s invalid: %s' % (partition.name, message))
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
main()
|
|
except InputError as e:
|
|
print(e, file=sys.stderr)
|
|
sys.exit(2)
|