mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 23:24:38 +00:00
72e423c6b6
Unfortunately mkimage gets upset with zero-sized files. Update the ObtainContents() method to support specifying the size, if a fake blob is created. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
1166 lines
42 KiB
Python
1166 lines
42 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2016 Google, Inc
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#
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# Base class for all entries
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#
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from collections import namedtuple
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import importlib
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import os
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import pathlib
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import sys
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from binman import bintool
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from binman import comp_util
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from dtoc import fdt_util
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from patman import tools
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from patman.tools import to_hex, to_hex_size
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from patman import tout
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modules = {}
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# This is imported if needed
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state = None
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# An argument which can be passed to entries on the command line, in lieu of
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# device-tree properties.
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EntryArg = namedtuple('EntryArg', ['name', 'datatype'])
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# Information about an entry for use when displaying summaries
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EntryInfo = namedtuple('EntryInfo', ['indent', 'name', 'etype', 'size',
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'image_pos', 'uncomp_size', 'offset',
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'entry'])
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class Entry(object):
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"""An Entry in the section
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An entry corresponds to a single node in the device-tree description
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of the section. Each entry ends up being a part of the final section.
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Entries can be placed either right next to each other, or with padding
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between them. The type of the entry determines the data that is in it.
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This class is not used by itself. All entry objects are subclasses of
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Entry.
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Attributes:
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section: Section object containing this entry
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node: The node that created this entry
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offset: Offset of entry within the section, None if not known yet (in
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which case it will be calculated by Pack())
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size: Entry size in bytes, None if not known
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pre_reset_size: size as it was before ResetForPack(). This allows us to
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keep track of the size we started with and detect size changes
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uncomp_size: Size of uncompressed data in bytes, if the entry is
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compressed, else None
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contents_size: Size of contents in bytes, 0 by default
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align: Entry start offset alignment relative to the start of the
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containing section, or None
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align_size: Entry size alignment, or None
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align_end: Entry end offset alignment relative to the start of the
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containing section, or None
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pad_before: Number of pad bytes before the contents when it is placed
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in the containing section, 0 if none. The pad bytes become part of
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the entry.
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pad_after: Number of pad bytes after the contents when it is placed in
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the containing section, 0 if none. The pad bytes become part of
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the entry.
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data: Contents of entry (string of bytes). This does not include
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padding created by pad_before or pad_after. If the entry is
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compressed, this contains the compressed data.
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uncomp_data: Original uncompressed data, if this entry is compressed,
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else None
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compress: Compression algoithm used (e.g. 'lz4'), 'none' if none
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orig_offset: Original offset value read from node
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orig_size: Original size value read from node
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missing: True if this entry is missing its contents
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allow_missing: Allow children of this entry to be missing (used by
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subclasses such as Entry_section)
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allow_fake: Allow creating a dummy fake file if the blob file is not
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available. This is mainly used for testing.
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external: True if this entry contains an external binary blob
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bintools: Bintools used by this entry (only populated for Image)
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missing_bintools: List of missing bintools for this entry
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update_hash: True if this entry's "hash" subnode should be
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updated with a hash of the entry contents
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"""
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def __init__(self, section, etype, node, name_prefix=''):
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# Put this here to allow entry-docs and help to work without libfdt
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global state
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from binman import state
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self.section = section
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self.etype = etype
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self._node = node
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self.name = node and (name_prefix + node.name) or 'none'
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self.offset = None
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self.size = None
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self.pre_reset_size = None
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self.uncomp_size = None
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self.data = None
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self.uncomp_data = None
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self.contents_size = 0
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self.align = None
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self.align_size = None
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self.align_end = None
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self.pad_before = 0
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self.pad_after = 0
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self.offset_unset = False
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self.image_pos = None
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self.extend_size = False
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self.compress = 'none'
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self.missing = False
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self.faked = False
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self.external = False
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self.allow_missing = False
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self.allow_fake = False
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self.bintools = {}
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self.missing_bintools = []
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self.update_hash = True
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@staticmethod
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def FindEntryClass(etype, expanded):
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"""Look up the entry class for a node.
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Args:
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node_node: Path name of Node object containing information about
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the entry to create (used for errors)
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etype: Entry type to use
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expanded: Use the expanded version of etype
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Returns:
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The entry class object if found, else None if not found and expanded
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is True, else a tuple:
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module name that could not be found
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exception received
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"""
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# Convert something like 'u-boot@0' to 'u_boot' since we are only
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# interested in the type.
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module_name = etype.replace('-', '_')
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if '@' in module_name:
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module_name = module_name.split('@')[0]
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if expanded:
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module_name += '_expanded'
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module = modules.get(module_name)
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# Also allow entry-type modules to be brought in from the etype directory.
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# Import the module if we have not already done so.
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if not module:
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try:
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module = importlib.import_module('binman.etype.' + module_name)
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except ImportError as e:
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if expanded:
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return None
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return module_name, e
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modules[module_name] = module
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# Look up the expected class name
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return getattr(module, 'Entry_%s' % module_name)
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@staticmethod
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def Lookup(node_path, etype, expanded, missing_etype=False):
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"""Look up the entry class for a node.
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Args:
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node_node (str): Path name of Node object containing information
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about the entry to create (used for errors)
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etype (str): Entry type to use
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expanded (bool): Use the expanded version of etype
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missing_etype (bool): True to default to a blob etype if the
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requested etype is not found
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Returns:
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The entry class object if found, else None if not found and expanded
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is True
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Raise:
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ValueError if expanded is False and the class is not found
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"""
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# Convert something like 'u-boot@0' to 'u_boot' since we are only
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# interested in the type.
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cls = Entry.FindEntryClass(etype, expanded)
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if cls is None:
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return None
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elif isinstance(cls, tuple):
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if missing_etype:
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cls = Entry.FindEntryClass('blob', False)
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if isinstance(cls, tuple): # This should not fail
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module_name, e = cls
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raise ValueError(
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"Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" %
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(etype, node_path, module_name, e))
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return cls
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@staticmethod
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def Create(section, node, etype=None, expanded=False, missing_etype=False):
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"""Create a new entry for a node.
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Args:
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section (entry_Section): Section object containing this node
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node (Node): Node object containing information about the entry to
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create
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etype (str): Entry type to use, or None to work it out (used for
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tests)
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expanded (bool): Use the expanded version of etype
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missing_etype (bool): True to default to a blob etype if the
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requested etype is not found
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Returns:
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A new Entry object of the correct type (a subclass of Entry)
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"""
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if not etype:
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etype = fdt_util.GetString(node, 'type', node.name)
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obj = Entry.Lookup(node.path, etype, expanded, missing_etype)
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if obj and expanded:
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# Check whether to use the expanded entry
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new_etype = etype + '-expanded'
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can_expand = not fdt_util.GetBool(node, 'no-expanded')
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if can_expand and obj.UseExpanded(node, etype, new_etype):
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etype = new_etype
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else:
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obj = None
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if not obj:
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obj = Entry.Lookup(node.path, etype, False, missing_etype)
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# Call its constructor to get the object we want.
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return obj(section, etype, node)
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def ReadNode(self):
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"""Read entry information from the node
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This must be called as the first thing after the Entry is created.
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This reads all the fields we recognise from the node, ready for use.
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"""
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if 'pos' in self._node.props:
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self.Raise("Please use 'offset' instead of 'pos'")
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if 'expand-size' in self._node.props:
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self.Raise("Please use 'extend-size' instead of 'expand-size'")
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self.offset = fdt_util.GetInt(self._node, 'offset')
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self.size = fdt_util.GetInt(self._node, 'size')
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self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset')
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self.orig_size = fdt_util.GetInt(self._node, 'orig-size')
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if self.GetImage().copy_to_orig:
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self.orig_offset = self.offset
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self.orig_size = self.size
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# These should not be set in input files, but are set in an FDT map,
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# which is also read by this code.
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self.image_pos = fdt_util.GetInt(self._node, 'image-pos')
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self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size')
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self.align = fdt_util.GetInt(self._node, 'align')
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if tools.not_power_of_two(self.align):
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raise ValueError("Node '%s': Alignment %s must be a power of two" %
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(self._node.path, self.align))
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if self.section and self.align is None:
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self.align = self.section.align_default
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self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0)
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self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0)
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self.align_size = fdt_util.GetInt(self._node, 'align-size')
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if tools.not_power_of_two(self.align_size):
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self.Raise("Alignment size %s must be a power of two" %
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self.align_size)
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self.align_end = fdt_util.GetInt(self._node, 'align-end')
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self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset')
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self.extend_size = fdt_util.GetBool(self._node, 'extend-size')
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self.missing_msg = fdt_util.GetString(self._node, 'missing-msg')
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# This is only supported by blobs and sections at present
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self.compress = fdt_util.GetString(self._node, 'compress', 'none')
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def GetDefaultFilename(self):
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return None
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def GetFdts(self):
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"""Get the device trees used by this entry
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Returns:
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Empty dict, if this entry is not a .dtb, otherwise:
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Dict:
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key: Filename from this entry (without the path)
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value: Tuple:
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Entry object for this dtb
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Filename of file containing this dtb
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"""
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return {}
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def gen_entries(self):
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"""Allow entries to generate other entries
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Some entries generate subnodes automatically, from which sub-entries
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are then created. This method allows those to be added to the binman
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definition for the current image. An entry which implements this method
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should call state.AddSubnode() to add a subnode and can add properties
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with state.AddString(), etc.
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An example is 'files', which produces a section containing a list of
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files.
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"""
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pass
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def AddMissingProperties(self, have_image_pos):
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"""Add new properties to the device tree as needed for this entry
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Args:
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have_image_pos: True if this entry has an image position. This can
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be False if its parent section is compressed, since compression
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groups all entries together into a compressed block of data,
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obscuring the start of each individual child entry
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"""
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for prop in ['offset', 'size']:
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if not prop in self._node.props:
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state.AddZeroProp(self._node, prop)
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if have_image_pos and 'image-pos' not in self._node.props:
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state.AddZeroProp(self._node, 'image-pos')
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if self.GetImage().allow_repack:
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if self.orig_offset is not None:
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state.AddZeroProp(self._node, 'orig-offset', True)
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if self.orig_size is not None:
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state.AddZeroProp(self._node, 'orig-size', True)
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if self.compress != 'none':
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state.AddZeroProp(self._node, 'uncomp-size')
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if self.update_hash:
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err = state.CheckAddHashProp(self._node)
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if err:
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self.Raise(err)
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def SetCalculatedProperties(self):
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"""Set the value of device-tree properties calculated by binman"""
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state.SetInt(self._node, 'offset', self.offset)
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state.SetInt(self._node, 'size', self.size)
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base = self.section.GetRootSkipAtStart() if self.section else 0
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if self.image_pos is not None:
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state.SetInt(self._node, 'image-pos', self.image_pos - base)
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if self.GetImage().allow_repack:
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if self.orig_offset is not None:
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state.SetInt(self._node, 'orig-offset', self.orig_offset, True)
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if self.orig_size is not None:
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state.SetInt(self._node, 'orig-size', self.orig_size, True)
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if self.uncomp_size is not None:
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state.SetInt(self._node, 'uncomp-size', self.uncomp_size)
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if self.update_hash:
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state.CheckSetHashValue(self._node, self.GetData)
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def ProcessFdt(self, fdt):
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"""Allow entries to adjust the device tree
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Some entries need to adjust the device tree for their purposes. This
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may involve adding or deleting properties.
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Returns:
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True if processing is complete
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False if processing could not be completed due to a dependency.
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This will cause the entry to be retried after others have been
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called
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"""
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return True
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def SetPrefix(self, prefix):
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"""Set the name prefix for a node
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Args:
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prefix: Prefix to set, or '' to not use a prefix
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"""
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if prefix:
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self.name = prefix + self.name
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def SetContents(self, data):
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"""Set the contents of an entry
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This sets both the data and content_size properties
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Args:
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data: Data to set to the contents (bytes)
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"""
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self.data = data
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self.contents_size = len(self.data)
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def ProcessContentsUpdate(self, data):
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"""Update the contents of an entry, after the size is fixed
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This checks that the new data is the same size as the old. If the size
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has changed, this triggers a re-run of the packing algorithm.
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Args:
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data: Data to set to the contents (bytes)
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Raises:
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ValueError if the new data size is not the same as the old
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"""
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size_ok = True
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new_size = len(data)
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if state.AllowEntryExpansion() and new_size > self.contents_size:
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# self.data will indicate the new size needed
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size_ok = False
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elif state.AllowEntryContraction() and new_size < self.contents_size:
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size_ok = False
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# If not allowed to change, try to deal with it or give up
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if size_ok:
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if new_size > self.contents_size:
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self.Raise('Cannot update entry size from %d to %d' %
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(self.contents_size, new_size))
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# Don't let the data shrink. Pad it if necessary
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if size_ok and new_size < self.contents_size:
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data += tools.get_bytes(0, self.contents_size - new_size)
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if not size_ok:
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tout.debug("Entry '%s' size change from %s to %s" % (
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self._node.path, to_hex(self.contents_size),
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to_hex(new_size)))
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self.SetContents(data)
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return size_ok
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def ObtainContents(self, skip_entry=None, fake_size=0):
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"""Figure out the contents of an entry.
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Args:
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skip_entry (Entry): Entry to skip when obtaining section contents
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fake_size (int): Size of fake file to create if needed
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Returns:
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True if the contents were found, False if another call is needed
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after the other entries are processed.
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"""
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# No contents by default: subclasses can implement this
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return True
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def ResetForPack(self):
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"""Reset offset/size fields so that packing can be done again"""
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self.Detail('ResetForPack: offset %s->%s, size %s->%s' %
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(to_hex(self.offset), to_hex(self.orig_offset),
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to_hex(self.size), to_hex(self.orig_size)))
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self.pre_reset_size = self.size
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self.offset = self.orig_offset
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self.size = self.orig_size
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def Pack(self, offset):
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"""Figure out how to pack the entry into the section
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Most of the time the entries are not fully specified. There may be
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an alignment but no size. In that case we take the size from the
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contents of the entry.
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If an entry has no hard-coded offset, it will be placed at @offset.
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Once this function is complete, both the offset and size of the
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entry will be know.
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Args:
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Current section offset pointer
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Returns:
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New section offset pointer (after this entry)
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"""
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self.Detail('Packing: offset=%s, size=%s, content_size=%x' %
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(to_hex(self.offset), to_hex(self.size),
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self.contents_size))
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if self.offset is None:
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if self.offset_unset:
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self.Raise('No offset set with offset-unset: should another '
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'entry provide this correct offset?')
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self.offset = tools.align(offset, self.align)
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needed = self.pad_before + self.contents_size + self.pad_after
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needed = tools.align(needed, self.align_size)
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size = self.size
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if not size:
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size = needed
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new_offset = self.offset + size
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aligned_offset = tools.align(new_offset, self.align_end)
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if aligned_offset != new_offset:
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size = aligned_offset - self.offset
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new_offset = aligned_offset
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if not self.size:
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self.size = size
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if self.size < needed:
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self.Raise("Entry contents size is %#x (%d) but entry size is "
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"%#x (%d)" % (needed, needed, self.size, self.size))
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# Check that the alignment is correct. It could be wrong if the
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# and offset or size values were provided (i.e. not calculated), but
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# conflict with the provided alignment values
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if self.size != tools.align(self.size, self.align_size):
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self.Raise("Size %#x (%d) does not match align-size %#x (%d)" %
|
|
(self.size, self.size, self.align_size, self.align_size))
|
|
if self.offset != tools.align(self.offset, self.align):
|
|
self.Raise("Offset %#x (%d) does not match align %#x (%d)" %
|
|
(self.offset, self.offset, self.align, self.align))
|
|
self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' %
|
|
(self.offset, self.size, self.contents_size, new_offset))
|
|
|
|
return new_offset
|
|
|
|
def Raise(self, msg):
|
|
"""Convenience function to raise an error referencing a node"""
|
|
raise ValueError("Node '%s': %s" % (self._node.path, msg))
|
|
|
|
def Info(self, msg):
|
|
"""Convenience function to log info referencing a node"""
|
|
tag = "Info '%s'" % self._node.path
|
|
tout.detail('%30s: %s' % (tag, msg))
|
|
|
|
def Detail(self, msg):
|
|
"""Convenience function to log detail referencing a node"""
|
|
tag = "Node '%s'" % self._node.path
|
|
tout.detail('%30s: %s' % (tag, msg))
|
|
|
|
def GetEntryArgsOrProps(self, props, required=False):
|
|
"""Return the values of a set of properties
|
|
|
|
Args:
|
|
props: List of EntryArg objects
|
|
|
|
Raises:
|
|
ValueError if a property is not found
|
|
"""
|
|
values = []
|
|
missing = []
|
|
for prop in props:
|
|
python_prop = prop.name.replace('-', '_')
|
|
if hasattr(self, python_prop):
|
|
value = getattr(self, python_prop)
|
|
else:
|
|
value = None
|
|
if value is None:
|
|
value = self.GetArg(prop.name, prop.datatype)
|
|
if value is None and required:
|
|
missing.append(prop.name)
|
|
values.append(value)
|
|
if missing:
|
|
self.GetImage().MissingArgs(self, missing)
|
|
return values
|
|
|
|
def GetPath(self):
|
|
"""Get the path of a node
|
|
|
|
Returns:
|
|
Full path of the node for this entry
|
|
"""
|
|
return self._node.path
|
|
|
|
def GetData(self, required=True):
|
|
"""Get the contents of an entry
|
|
|
|
Args:
|
|
required: True if the data must be present, False if it is OK to
|
|
return None
|
|
|
|
Returns:
|
|
bytes content of the entry, excluding any padding. If the entry is
|
|
compressed, the compressed data is returned
|
|
"""
|
|
self.Detail('GetData: size %s' % to_hex_size(self.data))
|
|
return self.data
|
|
|
|
def GetPaddedData(self, data=None):
|
|
"""Get the data for an entry including any padding
|
|
|
|
Gets the entry data and uses its section's pad-byte value to add padding
|
|
before and after as defined by the pad-before and pad-after properties.
|
|
|
|
This does not consider alignment.
|
|
|
|
Returns:
|
|
Contents of the entry along with any pad bytes before and
|
|
after it (bytes)
|
|
"""
|
|
if data is None:
|
|
data = self.GetData()
|
|
return self.section.GetPaddedDataForEntry(self, data)
|
|
|
|
def GetOffsets(self):
|
|
"""Get the offsets for siblings
|
|
|
|
Some entry types can contain information about the position or size of
|
|
other entries. An example of this is the Intel Flash Descriptor, which
|
|
knows where the Intel Management Engine section should go.
|
|
|
|
If this entry knows about the position of other entries, it can specify
|
|
this by returning values here
|
|
|
|
Returns:
|
|
Dict:
|
|
key: Entry type
|
|
value: List containing position and size of the given entry
|
|
type. Either can be None if not known
|
|
"""
|
|
return {}
|
|
|
|
def SetOffsetSize(self, offset, size):
|
|
"""Set the offset and/or size of an entry
|
|
|
|
Args:
|
|
offset: New offset, or None to leave alone
|
|
size: New size, or None to leave alone
|
|
"""
|
|
if offset is not None:
|
|
self.offset = offset
|
|
if size is not None:
|
|
self.size = size
|
|
|
|
def SetImagePos(self, image_pos):
|
|
"""Set the position in the image
|
|
|
|
Args:
|
|
image_pos: Position of this entry in the image
|
|
"""
|
|
self.image_pos = image_pos + self.offset
|
|
|
|
def ProcessContents(self):
|
|
"""Do any post-packing updates of entry contents
|
|
|
|
This function should call ProcessContentsUpdate() to update the entry
|
|
contents, if necessary, returning its return value here.
|
|
|
|
Args:
|
|
data: Data to set to the contents (bytes)
|
|
|
|
Returns:
|
|
True if the new data size is OK, False if expansion is needed
|
|
|
|
Raises:
|
|
ValueError if the new data size is not the same as the old and
|
|
state.AllowEntryExpansion() is False
|
|
"""
|
|
return True
|
|
|
|
def WriteSymbols(self, section):
|
|
"""Write symbol values into binary files for access at run time
|
|
|
|
Args:
|
|
section: Section containing the entry
|
|
"""
|
|
pass
|
|
|
|
def CheckEntries(self):
|
|
"""Check that the entry offsets are correct
|
|
|
|
This is used for entries which have extra offset requirements (other
|
|
than having to be fully inside their section). Sub-classes can implement
|
|
this function and raise if there is a problem.
|
|
"""
|
|
pass
|
|
|
|
@staticmethod
|
|
def GetStr(value):
|
|
if value is None:
|
|
return '<none> '
|
|
return '%08x' % value
|
|
|
|
@staticmethod
|
|
def WriteMapLine(fd, indent, name, offset, size, image_pos):
|
|
print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent,
|
|
Entry.GetStr(offset), Entry.GetStr(size),
|
|
name), file=fd)
|
|
|
|
def WriteMap(self, fd, indent):
|
|
"""Write a map of the entry to a .map file
|
|
|
|
Args:
|
|
fd: File to write the map to
|
|
indent: Curent indent level of map (0=none, 1=one level, etc.)
|
|
"""
|
|
self.WriteMapLine(fd, indent, self.name, self.offset, self.size,
|
|
self.image_pos)
|
|
|
|
def GetEntries(self):
|
|
"""Return a list of entries contained by this entry
|
|
|
|
Returns:
|
|
List of entries, or None if none. A normal entry has no entries
|
|
within it so will return None
|
|
"""
|
|
return None
|
|
|
|
def GetArg(self, name, datatype=str):
|
|
"""Get the value of an entry argument or device-tree-node property
|
|
|
|
Some node properties can be provided as arguments to binman. First check
|
|
the entry arguments, and fall back to the device tree if not found
|
|
|
|
Args:
|
|
name: Argument name
|
|
datatype: Data type (str or int)
|
|
|
|
Returns:
|
|
Value of argument as a string or int, or None if no value
|
|
|
|
Raises:
|
|
ValueError if the argument cannot be converted to in
|
|
"""
|
|
value = state.GetEntryArg(name)
|
|
if value is not None:
|
|
if datatype == int:
|
|
try:
|
|
value = int(value)
|
|
except ValueError:
|
|
self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" %
|
|
(name, value))
|
|
elif datatype == str:
|
|
pass
|
|
else:
|
|
raise ValueError("GetArg() internal error: Unknown data type '%s'" %
|
|
datatype)
|
|
else:
|
|
value = fdt_util.GetDatatype(self._node, name, datatype)
|
|
return value
|
|
|
|
@staticmethod
|
|
def WriteDocs(modules, test_missing=None):
|
|
"""Write out documentation about the various entry types to stdout
|
|
|
|
Args:
|
|
modules: List of modules to include
|
|
test_missing: Used for testing. This is a module to report
|
|
as missing
|
|
"""
|
|
print('''Binman Entry Documentation
|
|
===========================
|
|
|
|
This file describes the entry types supported by binman. These entry types can
|
|
be placed in an image one by one to build up a final firmware image. It is
|
|
fairly easy to create new entry types. Just add a new file to the 'etype'
|
|
directory. You can use the existing entries as examples.
|
|
|
|
Note that some entries are subclasses of others, using and extending their
|
|
features to produce new behaviours.
|
|
|
|
|
|
''')
|
|
modules = sorted(modules)
|
|
|
|
# Don't show the test entry
|
|
if '_testing' in modules:
|
|
modules.remove('_testing')
|
|
missing = []
|
|
for name in modules:
|
|
module = Entry.Lookup('WriteDocs', name, False)
|
|
docs = getattr(module, '__doc__')
|
|
if test_missing == name:
|
|
docs = None
|
|
if docs:
|
|
lines = docs.splitlines()
|
|
first_line = lines[0]
|
|
rest = [line[4:] for line in lines[1:]]
|
|
hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line)
|
|
print(hdr)
|
|
print('-' * len(hdr))
|
|
print('\n'.join(rest))
|
|
print()
|
|
print()
|
|
else:
|
|
missing.append(name)
|
|
|
|
if missing:
|
|
raise ValueError('Documentation is missing for modules: %s' %
|
|
', '.join(missing))
|
|
|
|
def GetUniqueName(self):
|
|
"""Get a unique name for a node
|
|
|
|
Returns:
|
|
String containing a unique name for a node, consisting of the name
|
|
of all ancestors (starting from within the 'binman' node) separated
|
|
by a dot ('.'). This can be useful for generating unique filesnames
|
|
in the output directory.
|
|
"""
|
|
name = self.name
|
|
node = self._node
|
|
while node.parent:
|
|
node = node.parent
|
|
if node.name == 'binman':
|
|
break
|
|
name = '%s.%s' % (node.name, name)
|
|
return name
|
|
|
|
def extend_to_limit(self, limit):
|
|
"""Extend an entry so that it ends at the given offset limit"""
|
|
if self.offset + self.size < limit:
|
|
self.size = limit - self.offset
|
|
# Request the contents again, since changing the size requires that
|
|
# the data grows. This should not fail, but check it to be sure.
|
|
if not self.ObtainContents():
|
|
self.Raise('Cannot obtain contents when expanding entry')
|
|
|
|
def HasSibling(self, name):
|
|
"""Check if there is a sibling of a given name
|
|
|
|
Returns:
|
|
True if there is an entry with this name in the the same section,
|
|
else False
|
|
"""
|
|
return name in self.section.GetEntries()
|
|
|
|
def GetSiblingImagePos(self, name):
|
|
"""Return the image position of the given sibling
|
|
|
|
Returns:
|
|
Image position of sibling, or None if the sibling has no position,
|
|
or False if there is no such sibling
|
|
"""
|
|
if not self.HasSibling(name):
|
|
return False
|
|
return self.section.GetEntries()[name].image_pos
|
|
|
|
@staticmethod
|
|
def AddEntryInfo(entries, indent, name, etype, size, image_pos,
|
|
uncomp_size, offset, entry):
|
|
"""Add a new entry to the entries list
|
|
|
|
Args:
|
|
entries: List (of EntryInfo objects) to add to
|
|
indent: Current indent level to add to list
|
|
name: Entry name (string)
|
|
etype: Entry type (string)
|
|
size: Entry size in bytes (int)
|
|
image_pos: Position within image in bytes (int)
|
|
uncomp_size: Uncompressed size if the entry uses compression, else
|
|
None
|
|
offset: Entry offset within parent in bytes (int)
|
|
entry: Entry object
|
|
"""
|
|
entries.append(EntryInfo(indent, name, etype, size, image_pos,
|
|
uncomp_size, offset, entry))
|
|
|
|
def ListEntries(self, entries, indent):
|
|
"""Add files in this entry to the list of entries
|
|
|
|
This can be overridden by subclasses which need different behaviour.
|
|
|
|
Args:
|
|
entries: List (of EntryInfo objects) to add to
|
|
indent: Current indent level to add to list
|
|
"""
|
|
self.AddEntryInfo(entries, indent, self.name, self.etype, self.size,
|
|
self.image_pos, self.uncomp_size, self.offset, self)
|
|
|
|
def ReadData(self, decomp=True, alt_format=None):
|
|
"""Read the data for an entry from the image
|
|
|
|
This is used when the image has been read in and we want to extract the
|
|
data for a particular entry from that image.
|
|
|
|
Args:
|
|
decomp: True to decompress any compressed data before returning it;
|
|
False to return the raw, uncompressed data
|
|
|
|
Returns:
|
|
Entry data (bytes)
|
|
"""
|
|
# Use True here so that we get an uncompressed section to work from,
|
|
# although compressed sections are currently not supported
|
|
tout.debug("ReadChildData section '%s', entry '%s'" %
|
|
(self.section.GetPath(), self.GetPath()))
|
|
data = self.section.ReadChildData(self, decomp, alt_format)
|
|
return data
|
|
|
|
def ReadChildData(self, child, decomp=True, alt_format=None):
|
|
"""Read the data for a particular child entry
|
|
|
|
This reads data from the parent and extracts the piece that relates to
|
|
the given child.
|
|
|
|
Args:
|
|
child (Entry): Child entry to read data for (must be valid)
|
|
decomp (bool): True to decompress any compressed data before
|
|
returning it; False to return the raw, uncompressed data
|
|
alt_format (str): Alternative format to read in, or None
|
|
|
|
Returns:
|
|
Data for the child (bytes)
|
|
"""
|
|
pass
|
|
|
|
def LoadData(self, decomp=True):
|
|
data = self.ReadData(decomp)
|
|
self.contents_size = len(data)
|
|
self.ProcessContentsUpdate(data)
|
|
self.Detail('Loaded data size %x' % len(data))
|
|
|
|
def GetAltFormat(self, data, alt_format):
|
|
"""Read the data for an extry in an alternative format
|
|
|
|
Supported formats are list in the documentation for each entry. An
|
|
example is fdtmap which provides .
|
|
|
|
Args:
|
|
data (bytes): Data to convert (this should have been produced by the
|
|
entry)
|
|
alt_format (str): Format to use
|
|
|
|
"""
|
|
pass
|
|
|
|
def GetImage(self):
|
|
"""Get the image containing this entry
|
|
|
|
Returns:
|
|
Image object containing this entry
|
|
"""
|
|
return self.section.GetImage()
|
|
|
|
def WriteData(self, data, decomp=True):
|
|
"""Write the data to an entry in the image
|
|
|
|
This is used when the image has been read in and we want to replace the
|
|
data for a particular entry in that image.
|
|
|
|
The image must be re-packed and written out afterwards.
|
|
|
|
Args:
|
|
data: Data to replace it with
|
|
decomp: True to compress the data if needed, False if data is
|
|
already compressed so should be used as is
|
|
|
|
Returns:
|
|
True if the data did not result in a resize of this entry, False if
|
|
the entry must be resized
|
|
"""
|
|
if self.size is not None:
|
|
self.contents_size = self.size
|
|
else:
|
|
self.contents_size = self.pre_reset_size
|
|
ok = self.ProcessContentsUpdate(data)
|
|
self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok))
|
|
section_ok = self.section.WriteChildData(self)
|
|
return ok and section_ok
|
|
|
|
def WriteChildData(self, child):
|
|
"""Handle writing the data in a child entry
|
|
|
|
This should be called on the child's parent section after the child's
|
|
data has been updated. It should update any data structures needed to
|
|
validate that the update is successful.
|
|
|
|
This base-class implementation does nothing, since the base Entry object
|
|
does not have any children.
|
|
|
|
Args:
|
|
child: Child Entry that was written
|
|
|
|
Returns:
|
|
True if the section could be updated successfully, False if the
|
|
data is such that the section could not update
|
|
"""
|
|
return True
|
|
|
|
def GetSiblingOrder(self):
|
|
"""Get the relative order of an entry amoung its siblings
|
|
|
|
Returns:
|
|
'start' if this entry is first among siblings, 'end' if last,
|
|
otherwise None
|
|
"""
|
|
entries = list(self.section.GetEntries().values())
|
|
if entries:
|
|
if self == entries[0]:
|
|
return 'start'
|
|
elif self == entries[-1]:
|
|
return 'end'
|
|
return 'middle'
|
|
|
|
def SetAllowMissing(self, allow_missing):
|
|
"""Set whether a section allows missing external blobs
|
|
|
|
Args:
|
|
allow_missing: True if allowed, False if not allowed
|
|
"""
|
|
# This is meaningless for anything other than sections
|
|
pass
|
|
|
|
def SetAllowFakeBlob(self, allow_fake):
|
|
"""Set whether a section allows to create a fake blob
|
|
|
|
Args:
|
|
allow_fake: True if allowed, False if not allowed
|
|
"""
|
|
self.allow_fake = allow_fake
|
|
|
|
def CheckMissing(self, missing_list):
|
|
"""Check if any entries in this section have missing external blobs
|
|
|
|
If there are missing blobs, the entries are added to the list
|
|
|
|
Args:
|
|
missing_list: List of Entry objects to be added to
|
|
"""
|
|
if self.missing:
|
|
missing_list.append(self)
|
|
|
|
def check_fake_fname(self, fname, size=0):
|
|
"""If the file is missing and the entry allows fake blobs, fake it
|
|
|
|
Sets self.faked to True if faked
|
|
|
|
Args:
|
|
fname (str): Filename to check
|
|
size (int): Size of fake file to create
|
|
|
|
Returns:
|
|
tuple:
|
|
fname (str): Filename of faked file
|
|
bool: True if the blob was faked, False if not
|
|
"""
|
|
if self.allow_fake and not pathlib.Path(fname).is_file():
|
|
outfname = tools.get_output_filename(os.path.basename(fname))
|
|
with open(outfname, "wb") as out:
|
|
out.truncate(size)
|
|
self.faked = True
|
|
tout.info(f"Entry '{self._node.path}': Faked file '{outfname}'")
|
|
return outfname, True
|
|
return fname, False
|
|
|
|
def CheckFakedBlobs(self, faked_blobs_list):
|
|
"""Check if any entries in this section have faked external blobs
|
|
|
|
If there are faked blobs, the entries are added to the list
|
|
|
|
Args:
|
|
fake_blobs_list: List of Entry objects to be added to
|
|
"""
|
|
# This is meaningless for anything other than blobs
|
|
pass
|
|
|
|
def GetAllowMissing(self):
|
|
"""Get whether a section allows missing external blobs
|
|
|
|
Returns:
|
|
True if allowed, False if not allowed
|
|
"""
|
|
return self.allow_missing
|
|
|
|
def record_missing_bintool(self, bintool):
|
|
"""Record a missing bintool that was needed to produce this entry
|
|
|
|
Args:
|
|
bintool (Bintool): Bintool that was missing
|
|
"""
|
|
self.missing_bintools.append(bintool)
|
|
|
|
def check_missing_bintools(self, missing_list):
|
|
"""Check if any entries in this section have missing bintools
|
|
|
|
If there are missing bintools, these are added to the list
|
|
|
|
Args:
|
|
missing_list: List of Bintool objects to be added to
|
|
"""
|
|
missing_list += self.missing_bintools
|
|
|
|
def GetHelpTags(self):
|
|
"""Get the tags use for missing-blob help
|
|
|
|
Returns:
|
|
list of possible tags, most desirable first
|
|
"""
|
|
return list(filter(None, [self.missing_msg, self.name, self.etype]))
|
|
|
|
def CompressData(self, indata):
|
|
"""Compress data according to the entry's compression method
|
|
|
|
Args:
|
|
indata: Data to compress
|
|
|
|
Returns:
|
|
Compressed data (first word is the compressed size)
|
|
"""
|
|
self.uncomp_data = indata
|
|
if self.compress != 'none':
|
|
self.uncomp_size = len(indata)
|
|
data = comp_util.compress(indata, self.compress)
|
|
return data
|
|
|
|
@classmethod
|
|
def UseExpanded(cls, node, etype, new_etype):
|
|
"""Check whether to use an expanded entry type
|
|
|
|
This is called by Entry.Create() when it finds an expanded version of
|
|
an entry type (e.g. 'u-boot-expanded'). If this method returns True then
|
|
it will be used (e.g. in place of 'u-boot'). If it returns False, it is
|
|
ignored.
|
|
|
|
Args:
|
|
node: Node object containing information about the entry to
|
|
create
|
|
etype: Original entry type being used
|
|
new_etype: New entry type proposed
|
|
|
|
Returns:
|
|
True to use this entry type, False to use the original one
|
|
"""
|
|
tout.info("Node '%s': etype '%s': %s selected" %
|
|
(node.path, etype, new_etype))
|
|
return True
|
|
|
|
def CheckAltFormats(self, alt_formats):
|
|
"""Add any alternative formats supported by this entry type
|
|
|
|
Args:
|
|
alt_formats (dict): Dict to add alt_formats to:
|
|
key: Name of alt format
|
|
value: Help text
|
|
"""
|
|
pass
|
|
|
|
def AddBintools(self, btools):
|
|
"""Add the bintools used by this entry type
|
|
|
|
Args:
|
|
btools (dict of Bintool):
|
|
"""
|
|
pass
|
|
|
|
@classmethod
|
|
def AddBintool(self, tools, name):
|
|
"""Add a new bintool to the tools used by this etype
|
|
|
|
Args:
|
|
name: Name of the tool
|
|
"""
|
|
btool = bintool.Bintool.create(name)
|
|
tools[name] = btool
|
|
return btool
|
|
|
|
def SetUpdateHash(self, update_hash):
|
|
"""Set whether this entry's "hash" subnode should be updated
|
|
|
|
Args:
|
|
update_hash: True if hash should be updated, False if not
|
|
"""
|
|
self.update_hash = update_hash
|
|
|
|
def collect_contents_to_file(self, entries, prefix, fake_size=0):
|
|
"""Put the contents of a list of entries into a file
|
|
|
|
Args:
|
|
entries (list of Entry): Entries to collect
|
|
prefix (str): Filename prefix of file to write to
|
|
fake_size (int): Size of fake file to create if needed
|
|
|
|
If any entry does not have contents yet, this function returns False
|
|
for the data.
|
|
|
|
Returns:
|
|
Tuple:
|
|
bytes: Concatenated data from all the entries (or None)
|
|
str: Filename of file written (or None if no data)
|
|
str: Unique portion of filename (or None if no data)
|
|
"""
|
|
data = b''
|
|
for entry in entries:
|
|
# First get the input data and put it in a file. If not available,
|
|
# try later.
|
|
if not entry.ObtainContents(fake_size=fake_size):
|
|
return None, None, None
|
|
data += entry.GetData()
|
|
uniq = self.GetUniqueName()
|
|
fname = tools.get_output_filename(f'{prefix}.{uniq}')
|
|
tools.write_file(fname, data)
|
|
return data, fname, uniq
|