mirror of
https://github.com/AsahiLinux/u-boot
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939d1062d0
Normally when an entry is created, any entry arguments it has are required to be provided, so it can actually generate its contents correctly. However when an existing image is read, Entry objects are created for each of the entries in the image. This happens as part of the process of reading the image into binman. In this case we don't need the entry arguments, since we do not intend to regenerate the entries, or at least not unless requested. So there is no sense in reporting an error for missing entry arguments. Add a new property for the Image to handle this case. Update the error reporting to be conditional on this property. Signed-off-by: Simon Glass <sjg@chromium.org>
377 lines
14 KiB
Python
377 lines
14 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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# Class for an image, the output of binman
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#
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from collections import OrderedDict
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import fnmatch
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from operator import attrgetter
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import os
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import re
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import sys
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from binman.entry import Entry
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from binman.etype import fdtmap
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from binman.etype import image_header
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from binman.etype import section
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from dtoc import fdt
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from dtoc import fdt_util
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from patman import tools
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from patman import tout
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class Image(section.Entry_section):
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"""A Image, representing an output from binman
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An image is comprised of a collection of entries each containing binary
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data. The image size must be large enough to hold all of this data.
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This class implements the various operations needed for images.
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Attributes:
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filename: Output filename for image
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image_node: Name of node containing the description for this image
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fdtmap_dtb: Fdt object for the fdtmap when loading from a file
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fdtmap_data: Contents of the fdtmap when loading from a file
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allow_repack: True to add properties to allow the image to be safely
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repacked later
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Args:
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copy_to_orig: Copy offset/size to orig_offset/orig_size after reading
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from the device tree
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test: True if this is being called from a test of Images. This this case
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there is no device tree defining the structure of the section, so
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we create a section manually.
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ignore_missing: Ignore any missing entry arguments (i.e. don't raise an
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exception). This should be used if the Image is being loaded from
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a file rather than generated. In that case we obviously don't need
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the entry arguments since the contents already exists.
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"""
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def __init__(self, name, node, copy_to_orig=True, test=False,
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ignore_missing=False):
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super().__init__(None, 'section', node, test=test)
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self.copy_to_orig = copy_to_orig
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self.name = 'main-section'
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self.image_name = name
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self._filename = '%s.bin' % self.image_name
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self.fdtmap_dtb = None
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self.fdtmap_data = None
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self.allow_repack = False
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self._ignore_missing = ignore_missing
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if not test:
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self.ReadNode()
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def ReadNode(self):
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super().ReadNode()
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filename = fdt_util.GetString(self._node, 'filename')
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if filename:
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self._filename = filename
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self.allow_repack = fdt_util.GetBool(self._node, 'allow-repack')
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@classmethod
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def FromFile(cls, fname):
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"""Convert an image file into an Image for use in binman
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Args:
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fname: Filename of image file to read
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Returns:
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Image object on success
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Raises:
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ValueError if something goes wrong
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"""
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data = tools.ReadFile(fname)
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size = len(data)
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# First look for an image header
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pos = image_header.LocateHeaderOffset(data)
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if pos is None:
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# Look for the FDT map
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pos = fdtmap.LocateFdtmap(data)
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if pos is None:
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raise ValueError('Cannot find FDT map in image')
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# We don't know the FDT size, so check its header first
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probe_dtb = fdt.Fdt.FromData(
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data[pos + fdtmap.FDTMAP_HDR_LEN:pos + 256])
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dtb_size = probe_dtb.GetFdtObj().totalsize()
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fdtmap_data = data[pos:pos + dtb_size + fdtmap.FDTMAP_HDR_LEN]
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fdt_data = fdtmap_data[fdtmap.FDTMAP_HDR_LEN:]
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out_fname = tools.GetOutputFilename('fdtmap.in.dtb')
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tools.WriteFile(out_fname, fdt_data)
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dtb = fdt.Fdt(out_fname)
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dtb.Scan()
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# Return an Image with the associated nodes
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root = dtb.GetRoot()
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image = Image('image', root, copy_to_orig=False, ignore_missing=True)
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image.image_node = fdt_util.GetString(root, 'image-node', 'image')
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image.fdtmap_dtb = dtb
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image.fdtmap_data = fdtmap_data
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image._data = data
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image._filename = fname
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image.image_name, _ = os.path.splitext(fname)
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return image
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def Raise(self, msg):
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"""Convenience function to raise an error referencing an image"""
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raise ValueError("Image '%s': %s" % (self._node.path, msg))
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def PackEntries(self):
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"""Pack all entries into the image"""
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super().Pack(0)
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def SetImagePos(self):
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# This first section in the image so it starts at 0
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super().SetImagePos(0)
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def ProcessEntryContents(self):
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"""Call the ProcessContents() method for each entry
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This is intended to adjust the contents as needed by the entry type.
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Returns:
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True if the new data size is OK, False if expansion is needed
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"""
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sizes_ok = True
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for entry in self._entries.values():
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if not entry.ProcessContents():
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sizes_ok = False
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tout.Debug("Entry '%s' size change" % self._node.path)
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return sizes_ok
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def WriteSymbols(self):
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"""Write symbol values into binary files for access at run time"""
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super().WriteSymbols(self)
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def BuildImage(self):
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"""Write the image to a file"""
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fname = tools.GetOutputFilename(self._filename)
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tout.Info("Writing image to '%s'" % fname)
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with open(fname, 'wb') as fd:
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data = self.GetPaddedData()
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fd.write(data)
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tout.Info("Wrote %#x bytes" % len(data))
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def WriteMap(self):
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"""Write a map of the image to a .map file
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Returns:
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Filename of map file written
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"""
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filename = '%s.map' % self.image_name
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fname = tools.GetOutputFilename(filename)
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with open(fname, 'w') as fd:
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print('%8s %8s %8s %s' % ('ImagePos', 'Offset', 'Size', 'Name'),
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file=fd)
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super().WriteMap(fd, 0)
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return fname
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def BuildEntryList(self):
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"""List the files in an image
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Returns:
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List of entry.EntryInfo objects describing all entries in the image
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"""
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entries = []
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self.ListEntries(entries, 0)
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return entries
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def FindEntryPath(self, entry_path):
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"""Find an entry at a given path in the image
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Args:
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entry_path: Path to entry (e.g. /ro-section/u-boot')
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Returns:
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Entry object corresponding to that past
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Raises:
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ValueError if no entry found
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"""
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parts = entry_path.split('/')
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entries = self.GetEntries()
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parent = '/'
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for part in parts:
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entry = entries.get(part)
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if not entry:
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raise ValueError("Entry '%s' not found in '%s'" %
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(part, parent))
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parent = entry.GetPath()
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entries = entry.GetEntries()
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return entry
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def ReadData(self, decomp=True):
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tout.Debug("Image '%s' ReadData(), size=%#x" %
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(self.GetPath(), len(self._data)))
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return self._data
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def GetListEntries(self, entry_paths):
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"""List the entries in an image
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This decodes the supplied image and returns a list of entries from that
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image, preceded by a header.
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Args:
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entry_paths: List of paths to match (each can have wildcards). Only
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entries whose names match one of these paths will be printed
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Returns:
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String error message if something went wrong, otherwise
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3-Tuple:
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List of EntryInfo objects
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List of lines, each
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List of text columns, each a string
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List of widths of each column
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"""
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def _EntryToStrings(entry):
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"""Convert an entry to a list of strings, one for each column
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Args:
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entry: EntryInfo object containing information to output
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Returns:
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List of strings, one for each field in entry
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"""
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def _AppendHex(val):
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"""Append a hex value, or an empty string if val is None
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Args:
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val: Integer value, or None if none
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"""
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args.append('' if val is None else '>%x' % val)
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args = [' ' * entry.indent + entry.name]
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_AppendHex(entry.image_pos)
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_AppendHex(entry.size)
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args.append(entry.etype)
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_AppendHex(entry.offset)
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_AppendHex(entry.uncomp_size)
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return args
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def _DoLine(lines, line):
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"""Add a line to the output list
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This adds a line (a list of columns) to the output list. It also updates
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the widths[] array with the maximum width of each column
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Args:
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lines: List of lines to add to
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line: List of strings, one for each column
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"""
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for i, item in enumerate(line):
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widths[i] = max(widths[i], len(item))
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lines.append(line)
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def _NameInPaths(fname, entry_paths):
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"""Check if a filename is in a list of wildcarded paths
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Args:
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fname: Filename to check
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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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Returns:
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True if any wildcard matches the filename (using Unix filename
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pattern matching, not regular expressions)
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False if not
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"""
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for path in entry_paths:
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if fnmatch.fnmatch(fname, path):
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return True
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return False
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entries = self.BuildEntryList()
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# This is our list of lines. Each item in the list is a list of strings, one
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# for each column
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lines = []
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HEADER = ['Name', 'Image-pos', 'Size', 'Entry-type', 'Offset',
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'Uncomp-size']
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num_columns = len(HEADER)
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# This records the width of each column, calculated as the maximum width of
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# all the strings in that column
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widths = [0] * num_columns
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_DoLine(lines, HEADER)
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# We won't print anything unless it has at least this indent. So at the
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# start we will print nothing, unless a path matches (or there are no
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# entry paths)
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MAX_INDENT = 100
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min_indent = MAX_INDENT
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path_stack = []
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path = ''
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indent = 0
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selected_entries = []
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for entry in entries:
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if entry.indent > indent:
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path_stack.append(path)
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elif entry.indent < indent:
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path_stack.pop()
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if path_stack:
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path = path_stack[-1] + '/' + entry.name
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indent = entry.indent
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# If there are entry paths to match and we are not looking at a
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# sub-entry of a previously matched entry, we need to check the path
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if entry_paths and indent <= min_indent:
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if _NameInPaths(path[1:], entry_paths):
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# Print this entry and all sub-entries (=higher indent)
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min_indent = indent
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else:
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# Don't print this entry, nor any following entries until we get
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# a path match
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min_indent = MAX_INDENT
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continue
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_DoLine(lines, _EntryToStrings(entry))
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selected_entries.append(entry)
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return selected_entries, lines, widths
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def LookupImageSymbol(self, sym_name, optional, msg, base_addr):
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"""Look up a symbol in an ELF file
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Looks up a symbol in an ELF file. Only entry types which come from an
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ELF image can be used by this function.
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This searches through this image including all of its subsections.
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At present the only entry properties supported are:
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offset
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image_pos - 'base_addr' is added if this is not an end-at-4gb image
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size
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Args:
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sym_name: Symbol name in the ELF file to look up in the format
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_binman_<entry>_prop_<property> where <entry> is the name of
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the entry and <property> is the property to find (e.g.
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_binman_u_boot_prop_offset). As a special case, you can append
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_any to <entry> to have it search for any matching entry. E.g.
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_binman_u_boot_any_prop_offset will match entries called u-boot,
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u-boot-img and u-boot-nodtb)
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optional: True if the symbol is optional. If False this function
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will raise if the symbol is not found
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msg: Message to display if an error occurs
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base_addr: Base address of image. This is added to the returned
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image_pos in most cases so that the returned position indicates
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where the targeted entry/binary has actually been loaded. But
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if end-at-4gb is used, this is not done, since the binary is
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already assumed to be linked to the ROM position and using
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execute-in-place (XIP).
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Returns:
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Value that should be assigned to that symbol, or None if it was
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optional and not found
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Raises:
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ValueError if the symbol is invalid or not found, or references a
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property which is not supported
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"""
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entries = OrderedDict()
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entries_by_name = {}
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self._CollectEntries(entries, entries_by_name, self)
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return self.LookupSymbol(sym_name, optional, msg, base_addr,
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entries_by_name)
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