943bf78a48
In some cases entries encapsulate other data and it is useful to access the data within. An example is the fdtmap which consists of a 16-byte header, followed by a devicetree. Provide an option to specify an alternative format when extracting files. In the case of fdtmap, this is 'fdt', which produces an FDT file which can be viewed with fdtdump. Signed-off-by: Simon Glass <sjg@chromium.org>
687 lines
24 KiB
Python
687 lines
24 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2016 Google, Inc
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# Written by Simon Glass <sjg@chromium.org>
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#
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# Creates binary images from input files controlled by a description
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#
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from collections import OrderedDict
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import glob
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import os
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import pkg_resources
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import re
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import sys
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from patman import tools
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from binman import cbfs_util
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from binman import elf
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from patman import command
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from patman import tout
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# List of images we plan to create
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# Make this global so that it can be referenced from tests
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images = OrderedDict()
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# Help text for each type of missing blob, dict:
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# key: Value of the entry's 'missing-msg' or entry name
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# value: Text for the help
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missing_blob_help = {}
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def _ReadImageDesc(binman_node, use_expanded):
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"""Read the image descriptions from the /binman node
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This normally produces a single Image object called 'image'. But if
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multiple images are present, they will all be returned.
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Args:
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binman_node: Node object of the /binman node
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use_expanded: True if the FDT will be updated with the entry information
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Returns:
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OrderedDict of Image objects, each of which describes an image
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"""
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images = OrderedDict()
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if 'multiple-images' in binman_node.props:
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for node in binman_node.subnodes:
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images[node.name] = Image(node.name, node,
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use_expanded=use_expanded)
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else:
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images['image'] = Image('image', binman_node, use_expanded=use_expanded)
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return images
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def _FindBinmanNode(dtb):
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"""Find the 'binman' node in the device tree
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Args:
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dtb: Fdt object to scan
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Returns:
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Node object of /binman node, or None if not found
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"""
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for node in dtb.GetRoot().subnodes:
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if node.name == 'binman':
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return node
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return None
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def _ReadMissingBlobHelp():
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"""Read the missing-blob-help file
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This file containins help messages explaining what to do when external blobs
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are missing.
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Returns:
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Dict:
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key: Message tag (str)
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value: Message text (str)
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"""
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def _FinishTag(tag, msg, result):
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if tag:
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result[tag] = msg.rstrip()
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tag = None
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msg = ''
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return tag, msg
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my_data = pkg_resources.resource_string(__name__, 'missing-blob-help')
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re_tag = re.compile('^([-a-z0-9]+):$')
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result = {}
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tag = None
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msg = ''
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for line in my_data.decode('utf-8').splitlines():
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if not line.startswith('#'):
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m_tag = re_tag.match(line)
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if m_tag:
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_, msg = _FinishTag(tag, msg, result)
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tag = m_tag.group(1)
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elif tag:
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msg += line + '\n'
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_FinishTag(tag, msg, result)
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return result
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def _ShowBlobHelp(path, text):
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tout.Warning('\n%s:' % path)
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for line in text.splitlines():
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tout.Warning(' %s' % line)
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def _ShowHelpForMissingBlobs(missing_list):
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"""Show help for each missing blob to help the user take action
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Args:
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missing_list: List of Entry objects to show help for
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"""
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global missing_blob_help
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if not missing_blob_help:
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missing_blob_help = _ReadMissingBlobHelp()
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for entry in missing_list:
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tags = entry.GetHelpTags()
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# Show the first match help message
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for tag in tags:
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if tag in missing_blob_help:
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_ShowBlobHelp(entry._node.path, missing_blob_help[tag])
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break
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def GetEntryModules(include_testing=True):
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"""Get a set of entry class implementations
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Returns:
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Set of paths to entry class filenames
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"""
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glob_list = pkg_resources.resource_listdir(__name__, 'etype')
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glob_list = [fname for fname in glob_list if fname.endswith('.py')]
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return set([os.path.splitext(os.path.basename(item))[0]
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for item in glob_list
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if include_testing or '_testing' not in item])
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def WriteEntryDocs(modules, test_missing=None):
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"""Write out documentation for all entries
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Args:
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modules: List of Module objects to get docs for
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test_missing: Used for testing only, to force an entry's documeentation
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to show as missing even if it is present. Should be set to None in
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normal use.
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"""
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from binman.entry import Entry
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Entry.WriteDocs(modules, test_missing)
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def ListEntries(image_fname, entry_paths):
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"""List the entries in an image
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This decodes the supplied image and displays a table of entries from that
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image, preceded by a header.
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Args:
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image_fname: Image filename to process
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entry_paths: List of wildcarded paths (e.g. ['*dtb*', 'u-boot*',
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'section/u-boot'])
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"""
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image = Image.FromFile(image_fname)
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entries, lines, widths = image.GetListEntries(entry_paths)
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num_columns = len(widths)
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for linenum, line in enumerate(lines):
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if linenum == 1:
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# Print header line
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print('-' * (sum(widths) + num_columns * 2))
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out = ''
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for i, item in enumerate(line):
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width = -widths[i]
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if item.startswith('>'):
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width = -width
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item = item[1:]
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txt = '%*s ' % (width, item)
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out += txt
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print(out.rstrip())
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def ReadEntry(image_fname, entry_path, decomp=True):
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"""Extract an entry from an image
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This extracts the data from a particular entry in an image
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Args:
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image_fname: Image filename to process
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entry_path: Path to entry to extract
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decomp: True to return uncompressed data, if the data is compress
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False to return the raw data
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Returns:
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data extracted from the entry
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"""
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global Image
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from binman.image import Image
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image = Image.FromFile(image_fname)
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entry = image.FindEntryPath(entry_path)
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return entry.ReadData(decomp)
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def ShowAltFormats(image):
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"""Show alternative formats available for entries in the image
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This shows a list of formats available.
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Args:
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image (Image): Image to check
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"""
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alt_formats = {}
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image.CheckAltFormats(alt_formats)
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print('%-10s %-20s %s' % ('Flag (-F)', 'Entry type', 'Description'))
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for name, val in alt_formats.items():
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entry, helptext = val
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print('%-10s %-20s %s' % (name, entry.etype, helptext))
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def ExtractEntries(image_fname, output_fname, outdir, entry_paths,
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decomp=True, alt_format=None):
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"""Extract the data from one or more entries and write it to files
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Args:
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image_fname: Image filename to process
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output_fname: Single output filename to use if extracting one file, None
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otherwise
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outdir: Output directory to use (for any number of files), else None
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entry_paths: List of entry paths to extract
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decomp: True to decompress the entry data
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Returns:
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List of EntryInfo records that were written
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"""
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image = Image.FromFile(image_fname)
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if alt_format == 'list':
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ShowAltFormats(image)
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return
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# Output an entry to a single file, as a special case
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if output_fname:
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if not entry_paths:
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raise ValueError('Must specify an entry path to write with -f')
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if len(entry_paths) != 1:
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raise ValueError('Must specify exactly one entry path to write with -f')
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entry = image.FindEntryPath(entry_paths[0])
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data = entry.ReadData(decomp, alt_format)
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tools.WriteFile(output_fname, data)
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tout.Notice("Wrote %#x bytes to file '%s'" % (len(data), output_fname))
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return
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# Otherwise we will output to a path given by the entry path of each entry.
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# This means that entries will appear in subdirectories if they are part of
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# a sub-section.
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einfos = image.GetListEntries(entry_paths)[0]
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tout.Notice('%d entries match and will be written' % len(einfos))
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for einfo in einfos:
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entry = einfo.entry
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data = entry.ReadData(decomp, alt_format)
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path = entry.GetPath()[1:]
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fname = os.path.join(outdir, path)
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# If this entry has children, create a directory for it and put its
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# data in a file called 'root' in that directory
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if entry.GetEntries():
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if fname and not os.path.exists(fname):
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os.makedirs(fname)
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fname = os.path.join(fname, 'root')
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tout.Notice("Write entry '%s' size %x to '%s'" %
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(entry.GetPath(), len(data), fname))
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tools.WriteFile(fname, data)
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return einfos
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def BeforeReplace(image, allow_resize):
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"""Handle getting an image ready for replacing entries in it
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Args:
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image: Image to prepare
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"""
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state.PrepareFromLoadedData(image)
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image.LoadData()
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# If repacking, drop the old offset/size values except for the original
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# ones, so we are only left with the constraints.
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if allow_resize:
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image.ResetForPack()
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def ReplaceOneEntry(image, entry, data, do_compress, allow_resize):
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"""Handle replacing a single entry an an image
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Args:
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image: Image to update
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entry: Entry to write
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data: Data to replace with
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do_compress: True to compress the data if needed, False if data is
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already compressed so should be used as is
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allow_resize: True to allow entries to change size (this does a re-pack
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of the entries), False to raise an exception
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"""
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if not entry.WriteData(data, do_compress):
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if not image.allow_repack:
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entry.Raise('Entry data size does not match, but allow-repack is not present for this image')
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if not allow_resize:
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entry.Raise('Entry data size does not match, but resize is disabled')
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def AfterReplace(image, allow_resize, write_map):
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"""Handle write out an image after replacing entries in it
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Args:
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image: Image to write
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allow_resize: True to allow entries to change size (this does a re-pack
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of the entries), False to raise an exception
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write_map: True to write a map file
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"""
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tout.Info('Processing image')
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ProcessImage(image, update_fdt=True, write_map=write_map,
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get_contents=False, allow_resize=allow_resize)
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def WriteEntryToImage(image, entry, data, do_compress=True, allow_resize=True,
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write_map=False):
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BeforeReplace(image, allow_resize)
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tout.Info('Writing data to %s' % entry.GetPath())
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ReplaceOneEntry(image, entry, data, do_compress, allow_resize)
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AfterReplace(image, allow_resize=allow_resize, write_map=write_map)
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def WriteEntry(image_fname, entry_path, data, do_compress=True,
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allow_resize=True, write_map=False):
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"""Replace an entry in an image
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This replaces the data in a particular entry in an image. This size of the
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new data must match the size of the old data unless allow_resize is True.
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Args:
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image_fname: Image filename to process
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entry_path: Path to entry to extract
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data: Data to replace with
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do_compress: True to compress the data if needed, False if data is
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already compressed so should be used as is
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allow_resize: True to allow entries to change size (this does a re-pack
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of the entries), False to raise an exception
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write_map: True to write a map file
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Returns:
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Image object that was updated
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"""
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tout.Info("Write entry '%s', file '%s'" % (entry_path, image_fname))
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image = Image.FromFile(image_fname)
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entry = image.FindEntryPath(entry_path)
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WriteEntryToImage(image, entry, data, do_compress=do_compress,
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allow_resize=allow_resize, write_map=write_map)
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return image
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def ReplaceEntries(image_fname, input_fname, indir, entry_paths,
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do_compress=True, allow_resize=True, write_map=False):
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"""Replace the data from one or more entries from input files
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Args:
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image_fname: Image filename to process
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input_fname: Single input filename to use if replacing one file, None
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otherwise
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indir: Input directory to use (for any number of files), else None
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entry_paths: List of entry paths to replace
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do_compress: True if the input data is uncompressed and may need to be
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compressed if the entry requires it, False if the data is already
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compressed.
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write_map: True to write a map file
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Returns:
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List of EntryInfo records that were written
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"""
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image_fname = os.path.abspath(image_fname)
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image = Image.FromFile(image_fname)
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# Replace an entry from a single file, as a special case
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if input_fname:
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if not entry_paths:
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raise ValueError('Must specify an entry path to read with -f')
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if len(entry_paths) != 1:
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raise ValueError('Must specify exactly one entry path to write with -f')
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entry = image.FindEntryPath(entry_paths[0])
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data = tools.ReadFile(input_fname)
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tout.Notice("Read %#x bytes from file '%s'" % (len(data), input_fname))
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WriteEntryToImage(image, entry, data, do_compress=do_compress,
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allow_resize=allow_resize, write_map=write_map)
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return
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# Otherwise we will input from a path given by the entry path of each entry.
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# This means that files must appear in subdirectories if they are part of
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# a sub-section.
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einfos = image.GetListEntries(entry_paths)[0]
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tout.Notice("Replacing %d matching entries in image '%s'" %
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(len(einfos), image_fname))
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BeforeReplace(image, allow_resize)
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for einfo in einfos:
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entry = einfo.entry
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if entry.GetEntries():
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tout.Info("Skipping section entry '%s'" % entry.GetPath())
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continue
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path = entry.GetPath()[1:]
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fname = os.path.join(indir, path)
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if os.path.exists(fname):
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tout.Notice("Write entry '%s' from file '%s'" %
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(entry.GetPath(), fname))
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data = tools.ReadFile(fname)
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ReplaceOneEntry(image, entry, data, do_compress, allow_resize)
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else:
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tout.Warning("Skipping entry '%s' from missing file '%s'" %
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(entry.GetPath(), fname))
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AfterReplace(image, allow_resize=allow_resize, write_map=write_map)
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return image
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def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt, use_expanded):
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"""Prepare the images to be processed and select the device tree
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This function:
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- reads in the device tree
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- finds and scans the binman node to create all entries
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- selects which images to build
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- Updates the device tress with placeholder properties for offset,
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image-pos, etc.
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Args:
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dtb_fname: Filename of the device tree file to use (.dts or .dtb)
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selected_images: List of images to output, or None for all
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update_fdt: True to update the FDT wth entry offsets, etc.
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use_expanded: True to use expanded versions of entries, if available.
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So if 'u-boot' is called for, we use 'u-boot-expanded' instead. This
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is needed if update_fdt is True (although tests may disable it)
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Returns:
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OrderedDict of images:
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key: Image name (str)
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value: Image object
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"""
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# Import these here in case libfdt.py is not available, in which case
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# the above help option still works.
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from dtoc import fdt
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from dtoc import fdt_util
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global images
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# Get the device tree ready by compiling it and copying the compiled
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# output into a file in our output directly. Then scan it for use
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# in binman.
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dtb_fname = fdt_util.EnsureCompiled(dtb_fname)
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fname = tools.GetOutputFilename('u-boot.dtb.out')
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tools.WriteFile(fname, tools.ReadFile(dtb_fname))
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dtb = fdt.FdtScan(fname)
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node = _FindBinmanNode(dtb)
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if not node:
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raise ValueError("Device tree '%s' does not have a 'binman' "
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"node" % dtb_fname)
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images = _ReadImageDesc(node, use_expanded)
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if select_images:
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skip = []
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new_images = OrderedDict()
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for name, image in images.items():
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if name in select_images:
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new_images[name] = image
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else:
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skip.append(name)
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images = new_images
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tout.Notice('Skipping images: %s' % ', '.join(skip))
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state.Prepare(images, dtb)
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# Prepare the device tree by making sure that any missing
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# properties are added (e.g. 'pos' and 'size'). The values of these
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# may not be correct yet, but we add placeholders so that the
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# size of the device tree is correct. Later, in
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# SetCalculatedProperties() we will insert the correct values
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# without changing the device-tree size, thus ensuring that our
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# entry offsets remain the same.
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for image in images.values():
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image.ExpandEntries()
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if update_fdt:
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image.AddMissingProperties(True)
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image.ProcessFdt(dtb)
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for dtb_item in state.GetAllFdts():
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dtb_item.Sync(auto_resize=True)
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dtb_item.Pack()
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dtb_item.Flush()
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return images
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def ProcessImage(image, update_fdt, write_map, get_contents=True,
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allow_resize=True, allow_missing=False):
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"""Perform all steps for this image, including checking and # writing it.
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This means that errors found with a later image will be reported after
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earlier images are already completed and written, but that does not seem
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important.
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Args:
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image: Image to process
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update_fdt: True to update the FDT wth entry offsets, etc.
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write_map: True to write a map file
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get_contents: True to get the image contents from files, etc., False if
|
|
the contents is already present
|
|
allow_resize: True to allow entries to change size (this does a re-pack
|
|
of the entries), False to raise an exception
|
|
allow_missing: Allow blob_ext objects to be missing
|
|
|
|
Returns:
|
|
True if one or more external blobs are missing, False if all are present
|
|
"""
|
|
if get_contents:
|
|
image.SetAllowMissing(allow_missing)
|
|
image.GetEntryContents()
|
|
image.GetEntryOffsets()
|
|
|
|
# We need to pack the entries to figure out where everything
|
|
# should be placed. This sets the offset/size of each entry.
|
|
# However, after packing we call ProcessEntryContents() which
|
|
# may result in an entry changing size. In that case we need to
|
|
# do another pass. Since the device tree often contains the
|
|
# final offset/size information we try to make space for this in
|
|
# AddMissingProperties() above. However, if the device is
|
|
# compressed we cannot know this compressed size in advance,
|
|
# since changing an offset from 0x100 to 0x104 (for example) can
|
|
# alter the compressed size of the device tree. So we need a
|
|
# third pass for this.
|
|
passes = 5
|
|
for pack_pass in range(passes):
|
|
try:
|
|
image.PackEntries()
|
|
except Exception as e:
|
|
if write_map:
|
|
fname = image.WriteMap()
|
|
print("Wrote map file '%s' to show errors" % fname)
|
|
raise
|
|
image.SetImagePos()
|
|
if update_fdt:
|
|
image.SetCalculatedProperties()
|
|
for dtb_item in state.GetAllFdts():
|
|
dtb_item.Sync()
|
|
dtb_item.Flush()
|
|
image.WriteSymbols()
|
|
sizes_ok = image.ProcessEntryContents()
|
|
if sizes_ok:
|
|
break
|
|
image.ResetForPack()
|
|
tout.Info('Pack completed after %d pass(es)' % (pack_pass + 1))
|
|
if not sizes_ok:
|
|
image.Raise('Entries changed size after packing (tried %s passes)' %
|
|
passes)
|
|
|
|
image.BuildImage()
|
|
if write_map:
|
|
image.WriteMap()
|
|
missing_list = []
|
|
image.CheckMissing(missing_list)
|
|
if missing_list:
|
|
tout.Warning("Image '%s' is missing external blobs and is non-functional: %s" %
|
|
(image.name, ' '.join([e.name for e in missing_list])))
|
|
_ShowHelpForMissingBlobs(missing_list)
|
|
return bool(missing_list)
|
|
|
|
|
|
def Binman(args):
|
|
"""The main control code for binman
|
|
|
|
This assumes that help and test options have already been dealt with. It
|
|
deals with the core task of building images.
|
|
|
|
Args:
|
|
args: Command line arguments Namespace object
|
|
"""
|
|
global Image
|
|
global state
|
|
|
|
if args.full_help:
|
|
tools.PrintFullHelp(
|
|
os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])), 'README.rst')
|
|
)
|
|
return 0
|
|
|
|
# Put these here so that we can import this module without libfdt
|
|
from binman.image import Image
|
|
from binman import state
|
|
|
|
if args.cmd in ['ls', 'extract', 'replace']:
|
|
try:
|
|
tout.Init(args.verbosity)
|
|
tools.PrepareOutputDir(None)
|
|
if args.cmd == 'ls':
|
|
ListEntries(args.image, args.paths)
|
|
|
|
if args.cmd == 'extract':
|
|
ExtractEntries(args.image, args.filename, args.outdir, args.paths,
|
|
not args.uncompressed, args.format)
|
|
|
|
if args.cmd == 'replace':
|
|
ReplaceEntries(args.image, args.filename, args.indir, args.paths,
|
|
do_compress=not args.compressed,
|
|
allow_resize=not args.fix_size, write_map=args.map)
|
|
except:
|
|
raise
|
|
finally:
|
|
tools.FinaliseOutputDir()
|
|
return 0
|
|
|
|
elf_params = None
|
|
if args.update_fdt_in_elf:
|
|
elf_params = args.update_fdt_in_elf.split(',')
|
|
if len(elf_params) != 4:
|
|
raise ValueError('Invalid args %s to --update-fdt-in-elf: expected infile,outfile,begin_sym,end_sym' %
|
|
elf_params)
|
|
|
|
# Try to figure out which device tree contains our image description
|
|
if args.dt:
|
|
dtb_fname = args.dt
|
|
else:
|
|
board = args.board
|
|
if not board:
|
|
raise ValueError('Must provide a board to process (use -b <board>)')
|
|
board_pathname = os.path.join(args.build_dir, board)
|
|
dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
|
|
if not args.indir:
|
|
args.indir = ['.']
|
|
args.indir.append(board_pathname)
|
|
|
|
try:
|
|
tout.Init(args.verbosity)
|
|
elf.debug = args.debug
|
|
cbfs_util.VERBOSE = args.verbosity > 2
|
|
state.use_fake_dtb = args.fake_dtb
|
|
|
|
# Normally we replace the 'u-boot' etype with 'u-boot-expanded', etc.
|
|
# When running tests this can be disabled using this flag. When not
|
|
# updating the FDT in image, it is not needed by binman, but we use it
|
|
# for consistency, so that the images look the same to U-Boot at
|
|
# runtime.
|
|
use_expanded = not args.no_expanded
|
|
try:
|
|
tools.SetInputDirs(args.indir)
|
|
tools.PrepareOutputDir(args.outdir, args.preserve)
|
|
tools.SetToolPaths(args.toolpath)
|
|
state.SetEntryArgs(args.entry_arg)
|
|
state.SetThreads(args.threads)
|
|
|
|
images = PrepareImagesAndDtbs(dtb_fname, args.image,
|
|
args.update_fdt, use_expanded)
|
|
if args.test_section_timeout:
|
|
# Set the first image to timeout, used in testThreadTimeout()
|
|
images[list(images.keys())[0]].test_section_timeout = True
|
|
missing = False
|
|
for image in images.values():
|
|
missing |= ProcessImage(image, args.update_fdt, args.map,
|
|
allow_missing=args.allow_missing)
|
|
|
|
# Write the updated FDTs to our output files
|
|
for dtb_item in state.GetAllFdts():
|
|
tools.WriteFile(dtb_item._fname, dtb_item.GetContents())
|
|
|
|
if elf_params:
|
|
data = state.GetFdtForEtype('u-boot-dtb').GetContents()
|
|
elf.UpdateFile(*elf_params, data)
|
|
|
|
if missing:
|
|
tout.Warning("\nSome images are invalid")
|
|
|
|
# Use this to debug the time take to pack the image
|
|
#state.TimingShow()
|
|
finally:
|
|
tools.FinaliseOutputDir()
|
|
finally:
|
|
tout.Uninit()
|
|
|
|
return 0
|