1 # SPDX-License-Identifier: GPL-2.0+
2 # Copyright (c) 2016 Google, Inc
3 # Written by Simon Glass <sjg@chromium.org>
5 # Class for an image, the output of binman
8 from collections import OrderedDict
10 from operator import attrgetter
15 from binman.entry import Entry
16 from binman.etype import fdtmap
17 from binman.etype import image_header
18 from binman.etype import section
20 from dtoc import fdt_util
21 from patman import tools
22 from patman import tout
24 class Image(section.Entry_section):
25 """A Image, representing an output from binman
27 An image is comprised of a collection of entries each containing binary
28 data. The image size must be large enough to hold all of this data.
30 This class implements the various operations needed for images.
33 filename: Output filename for image
34 image_node: Name of node containing the description for this image
35 fdtmap_dtb: Fdt object for the fdtmap when loading from a file
36 fdtmap_data: Contents of the fdtmap when loading from a file
37 allow_repack: True to add properties to allow the image to be safely
41 copy_to_orig: Copy offset/size to orig_offset/orig_size after reading
43 test: True if this is being called from a test of Images. This this case
44 there is no device tree defining the structure of the section, so
45 we create a section manually.
46 ignore_missing: Ignore any missing entry arguments (i.e. don't raise an
47 exception). This should be used if the Image is being loaded from
48 a file rather than generated. In that case we obviously don't need
49 the entry arguments since the contents already exists.
51 def __init__(self, name, node, copy_to_orig=True, test=False,
52 ignore_missing=False):
53 super().__init__(None, 'section', node, test=test)
54 self.copy_to_orig = copy_to_orig
55 self.name = 'main-section'
56 self.image_name = name
57 self._filename = '%s.bin' % self.image_name
58 self.fdtmap_dtb = None
59 self.fdtmap_data = None
60 self.allow_repack = False
61 self._ignore_missing = ignore_missing
67 filename = fdt_util.GetString(self._node, 'filename')
69 self._filename = filename
70 self.allow_repack = fdt_util.GetBool(self._node, 'allow-repack')
73 def FromFile(cls, fname):
74 """Convert an image file into an Image for use in binman
77 fname: Filename of image file to read
80 Image object on success
83 ValueError if something goes wrong
85 data = tools.ReadFile(fname)
88 # First look for an image header
89 pos = image_header.LocateHeaderOffset(data)
91 # Look for the FDT map
92 pos = fdtmap.LocateFdtmap(data)
94 raise ValueError('Cannot find FDT map in image')
96 # We don't know the FDT size, so check its header first
97 probe_dtb = fdt.Fdt.FromData(
98 data[pos + fdtmap.FDTMAP_HDR_LEN:pos + 256])
99 dtb_size = probe_dtb.GetFdtObj().totalsize()
100 fdtmap_data = data[pos:pos + dtb_size + fdtmap.FDTMAP_HDR_LEN]
101 fdt_data = fdtmap_data[fdtmap.FDTMAP_HDR_LEN:]
102 out_fname = tools.GetOutputFilename('fdtmap.in.dtb')
103 tools.WriteFile(out_fname, fdt_data)
104 dtb = fdt.Fdt(out_fname)
107 # Return an Image with the associated nodes
109 image = Image('image', root, copy_to_orig=False, ignore_missing=True)
111 image.image_node = fdt_util.GetString(root, 'image-node', 'image')
112 image.fdtmap_dtb = dtb
113 image.fdtmap_data = fdtmap_data
115 image._filename = fname
116 image.image_name, _ = os.path.splitext(fname)
119 def Raise(self, msg):
120 """Convenience function to raise an error referencing an image"""
121 raise ValueError("Image '%s': %s" % (self._node.path, msg))
123 def PackEntries(self):
124 """Pack all entries into the image"""
127 def SetImagePos(self):
128 # This first section in the image so it starts at 0
129 super().SetImagePos(0)
131 def ProcessEntryContents(self):
132 """Call the ProcessContents() method for each entry
134 This is intended to adjust the contents as needed by the entry type.
137 True if the new data size is OK, False if expansion is needed
139 return super().ProcessContents()
141 def WriteSymbols(self):
142 """Write symbol values into binary files for access at run time"""
143 super().WriteSymbols(self)
145 def BuildImage(self):
146 """Write the image to a file"""
147 fname = tools.GetOutputFilename(self._filename)
148 tout.Info("Writing image to '%s'" % fname)
149 with open(fname, 'wb') as fd:
150 data = self.GetPaddedData()
152 tout.Info("Wrote %#x bytes" % len(data))
155 """Write a map of the image to a .map file
158 Filename of map file written
160 filename = '%s.map' % self.image_name
161 fname = tools.GetOutputFilename(filename)
162 with open(fname, 'w') as fd:
163 print('%8s %8s %8s %s' % ('ImagePos', 'Offset', 'Size', 'Name'),
165 super().WriteMap(fd, 0)
168 def BuildEntryList(self):
169 """List the files in an image
172 List of entry.EntryInfo objects describing all entries in the image
175 self.ListEntries(entries, 0)
178 def FindEntryPath(self, entry_path):
179 """Find an entry at a given path in the image
182 entry_path: Path to entry (e.g. /ro-section/u-boot')
185 Entry object corresponding to that past
188 ValueError if no entry found
190 parts = entry_path.split('/')
191 entries = self.GetEntries()
194 entry = entries.get(part)
196 raise ValueError("Entry '%s' not found in '%s'" %
198 parent = entry.GetPath()
199 entries = entry.GetEntries()
202 def ReadData(self, decomp=True):
203 tout.Debug("Image '%s' ReadData(), size=%#x" %
204 (self.GetPath(), len(self._data)))
207 def GetListEntries(self, entry_paths):
208 """List the entries in an image
210 This decodes the supplied image and returns a list of entries from that
211 image, preceded by a header.
214 entry_paths: List of paths to match (each can have wildcards). Only
215 entries whose names match one of these paths will be printed
218 String error message if something went wrong, otherwise
220 List of EntryInfo objects
222 List of text columns, each a string
223 List of widths of each column
225 def _EntryToStrings(entry):
226 """Convert an entry to a list of strings, one for each column
229 entry: EntryInfo object containing information to output
232 List of strings, one for each field in entry
235 """Append a hex value, or an empty string if val is None
238 val: Integer value, or None if none
240 args.append('' if val is None else '>%x' % val)
242 args = [' ' * entry.indent + entry.name]
243 _AppendHex(entry.image_pos)
244 _AppendHex(entry.size)
245 args.append(entry.etype)
246 _AppendHex(entry.offset)
247 _AppendHex(entry.uncomp_size)
250 def _DoLine(lines, line):
251 """Add a line to the output list
253 This adds a line (a list of columns) to the output list. It also updates
254 the widths[] array with the maximum width of each column
257 lines: List of lines to add to
258 line: List of strings, one for each column
260 for i, item in enumerate(line):
261 widths[i] = max(widths[i], len(item))
264 def _NameInPaths(fname, entry_paths):
265 """Check if a filename is in a list of wildcarded paths
268 fname: Filename to check
269 entry_paths: List of wildcarded paths (e.g. ['*dtb*', 'u-boot*',
273 True if any wildcard matches the filename (using Unix filename
274 pattern matching, not regular expressions)
277 for path in entry_paths:
278 if fnmatch.fnmatch(fname, path):
282 entries = self.BuildEntryList()
284 # This is our list of lines. Each item in the list is a list of strings, one
287 HEADER = ['Name', 'Image-pos', 'Size', 'Entry-type', 'Offset',
289 num_columns = len(HEADER)
291 # This records the width of each column, calculated as the maximum width of
292 # all the strings in that column
293 widths = [0] * num_columns
294 _DoLine(lines, HEADER)
296 # We won't print anything unless it has at least this indent. So at the
297 # start we will print nothing, unless a path matches (or there are no
300 min_indent = MAX_INDENT
304 selected_entries = []
305 for entry in entries:
306 if entry.indent > indent:
307 path_stack.append(path)
308 elif entry.indent < indent:
311 path = path_stack[-1] + '/' + entry.name
312 indent = entry.indent
314 # If there are entry paths to match and we are not looking at a
315 # sub-entry of a previously matched entry, we need to check the path
316 if entry_paths and indent <= min_indent:
317 if _NameInPaths(path[1:], entry_paths):
318 # Print this entry and all sub-entries (=higher indent)
321 # Don't print this entry, nor any following entries until we get
323 min_indent = MAX_INDENT
325 _DoLine(lines, _EntryToStrings(entry))
326 selected_entries.append(entry)
327 return selected_entries, lines, widths
329 def LookupImageSymbol(self, sym_name, optional, msg, base_addr):
330 """Look up a symbol in an ELF file
332 Looks up a symbol in an ELF file. Only entry types which come from an
333 ELF image can be used by this function.
335 This searches through this image including all of its subsections.
337 At present the only entry properties supported are:
339 image_pos - 'base_addr' is added if this is not an end-at-4gb image
343 sym_name: Symbol name in the ELF file to look up in the format
344 _binman_<entry>_prop_<property> where <entry> is the name of
345 the entry and <property> is the property to find (e.g.
346 _binman_u_boot_prop_offset). As a special case, you can append
347 _any to <entry> to have it search for any matching entry. E.g.
348 _binman_u_boot_any_prop_offset will match entries called u-boot,
349 u-boot-img and u-boot-nodtb)
350 optional: True if the symbol is optional. If False this function
351 will raise if the symbol is not found
352 msg: Message to display if an error occurs
353 base_addr: Base address of image. This is added to the returned
354 image_pos in most cases so that the returned position indicates
355 where the targeted entry/binary has actually been loaded. But
356 if end-at-4gb is used, this is not done, since the binary is
357 already assumed to be linked to the ROM position and using
358 execute-in-place (XIP).
361 Value that should be assigned to that symbol, or None if it was
362 optional and not found
365 ValueError if the symbol is invalid or not found, or references a
366 property which is not supported
368 entries = OrderedDict()
370 self._CollectEntries(entries, entries_by_name, self)
371 return self.LookupSymbol(sym_name, optional, msg, base_addr,