1 # SPDX-License-Identifier: GPL-2.0+
2 # Copyright (c) 2018 Google, Inc
3 # Written by Simon Glass <sjg@chromium.org>
5 """Entry-type module for sections (groups of entries)
7 Sections are entries which can contain other entries. This allows hierarchical
11 from collections import OrderedDict
15 from binman.entry import Entry
16 from dtoc import fdt_util
17 from patman import tools
18 from patman import tout
19 from patman.tools import ToHexSize
22 class Entry_section(Entry):
23 """Entry that contains other entries
25 Properties / Entry arguments: (see binman README for more information)
26 pad-byte: Pad byte to use when padding
27 sort-by-offset: True if entries should be sorted by offset, False if
28 they must be in-order in the device tree description
29 end-at-4gb: Used to build an x86 ROM which ends at 4GB (2^32)
30 skip-at-start: Number of bytes before the first entry starts. These
31 effectively adjust the starting offset of entries. For example,
32 if this is 16, then the first entry would start at 16. An entry
33 with offset = 20 would in fact be written at offset 4 in the image
34 file, since the first 16 bytes are skipped when writing.
35 name-prefix: Adds a prefix to the name of every entry in the section
36 when writing out the map
39 allow_missing: True if this section permits external blobs to be
40 missing their contents. The second will produce an image but of
41 course it will not work.
43 Since a section is also an entry, it inherits all the properies of entries
46 A section is an entry which can contain other entries, thus allowing
47 hierarchical images to be created. See 'Sections and hierarchical images'
48 in the binman README for more information.
50 def __init__(self, section, etype, node, test=False):
52 super().__init__(section, etype, node)
53 self._entries = OrderedDict()
56 self._skip_at_start = None
60 """Read properties from the section node"""
62 self._pad_byte = fdt_util.GetInt(self._node, 'pad-byte', 0)
63 self._sort = fdt_util.GetBool(self._node, 'sort-by-offset')
64 self._end_4gb = fdt_util.GetBool(self._node, 'end-at-4gb')
65 self._skip_at_start = fdt_util.GetInt(self._node, 'skip-at-start')
68 self.Raise("Section size must be provided when using end-at-4gb")
69 if self._skip_at_start is not None:
70 self.Raise("Provide either 'end-at-4gb' or 'skip-at-start'")
72 self._skip_at_start = 0x100000000 - self.size
74 if self._skip_at_start is None:
75 self._skip_at_start = 0
76 self._name_prefix = fdt_util.GetString(self._node, 'name-prefix')
77 filename = fdt_util.GetString(self._node, 'filename')
79 self._filename = filename
83 def _ReadEntries(self):
84 for node in self._node.subnodes:
85 if node.name.startswith('hash') or node.name.startswith('signature'):
87 entry = Entry.Create(self, node)
89 entry.SetPrefix(self._name_prefix)
90 self._entries[node.name] = entry
92 def _Raise(self, msg):
93 """Raises an error for this section
96 msg: Error message to use in the raise string
100 raise ValueError("Section '%s': %s" % (self._node.path, msg))
104 for entry in self._entries.values():
105 fdts.update(entry.GetFdts())
108 def ProcessFdt(self, fdt):
109 """Allow entries to adjust the device tree
111 Some entries need to adjust the device tree for their purposes. This
112 may involve adding or deleting properties.
114 todo = self._entries.values()
115 for passnum in range(3):
118 if not entry.ProcessFdt(fdt):
119 next_todo.append(entry)
124 self.Raise('Internal error: Could not complete processing of Fdt: remaining %s' %
128 def ExpandEntries(self):
129 """Expand out any entries which have calculated sub-entries
131 Some entries are expanded out at runtime, e.g. 'files', which produces
132 a section containing a list of files. Process these entries so that
133 this information is added to the device tree.
135 super().ExpandEntries()
136 for entry in self._entries.values():
137 entry.ExpandEntries()
139 def AddMissingProperties(self):
140 """Add new properties to the device tree as needed for this entry"""
141 super().AddMissingProperties()
142 for entry in self._entries.values():
143 entry.AddMissingProperties()
145 def ObtainContents(self):
146 return self.GetEntryContents()
148 def GetPaddedDataForEntry(self, entry):
149 """Get the data for an entry including any padding
151 Gets the entry data and uses the section pad-byte value to add padding
152 before and after as defined by the pad-before and pad-after properties.
153 This does not consider alignment.
156 entry: Entry to check
159 Contents of the entry along with any pad bytes before and
162 pad_byte = (entry._pad_byte if isinstance(entry, Entry_section)
166 # Handle padding before the entry
168 data += tools.GetBytes(self._pad_byte, entry.pad_before)
170 # Add in the actual entry data
171 data += entry.GetData()
173 # Handle padding after the entry
175 data += tools.GetBytes(self._pad_byte, entry.pad_after)
178 data += tools.GetBytes(pad_byte, entry.size - len(data))
180 self.Detail('GetPaddedDataForEntry: size %s' % ToHexSize(self.data))
184 def _BuildSectionData(self):
185 """Build the contents of a section
187 This places all entries at the right place, dealing with padding before
188 and after entries. It does not do padding for the section itself (the
189 pad-before and pad-after properties in the section items) since that is
190 handled by the parent section.
193 Contents of the section (bytes)
197 for entry in self._entries.values():
198 data = self.GetPaddedDataForEntry(entry)
199 # Handle empty space before the entry
200 pad = (entry.offset or 0) - self._skip_at_start - len(section_data)
202 section_data += tools.GetBytes(self._pad_byte, pad)
204 # Add in the actual entry data
207 self.Detail('GetData: %d entries, total size %#x' %
208 (len(self._entries), len(section_data)))
209 return self.CompressData(section_data)
211 def GetPaddedData(self):
212 """Get the data for a section including any padding
214 Gets the section data and uses the parent section's pad-byte value to
215 add padding before and after as defined by the pad-before and pad-after
216 properties. If this is a top-level section (i.e. an image), this is the
217 same as GetData(), since padding is not supported.
219 This does not consider alignment.
222 Contents of the section along with any pad bytes before and
225 section = self.section or self
226 return section.GetPaddedDataForEntry(self)
229 """Get the contents of an entry
231 This builds the contents of the section, stores this as the contents of
232 the section and returns it
235 bytes content of the section, made up for all all of its subentries.
236 This excludes any padding. If the section is compressed, the
237 compressed data is returned
239 data = self._BuildSectionData()
240 self.SetContents(data)
243 def GetOffsets(self):
244 """Handle entries that want to set the offset/size of other entries
246 This calls each entry's GetOffsets() method. If it returns a list
247 of entries to update, it updates them.
249 self.GetEntryOffsets()
252 def ResetForPack(self):
253 """Reset offset/size fields so that packing can be done again"""
254 super().ResetForPack()
255 for entry in self._entries.values():
258 def Pack(self, offset):
259 """Pack all entries into the section"""
261 return super().Pack(offset)
263 def _PackEntries(self):
264 """Pack all entries into the section"""
265 offset = self._skip_at_start
266 for entry in self._entries.values():
267 offset = entry.Pack(offset)
268 self.size = self.CheckSize()
270 def _ExpandEntries(self):
271 """Expand any entries that are permitted to"""
273 for entry in self._entries.values():
275 exp_entry.ExpandToLimit(entry.offset)
277 if entry.expand_size:
280 exp_entry.ExpandToLimit(self.size)
282 def _SortEntries(self):
283 """Sort entries by offset"""
284 entries = sorted(self._entries.values(), key=lambda entry: entry.offset)
285 self._entries.clear()
286 for entry in entries:
287 self._entries[entry._node.name] = entry
289 def CheckEntries(self):
290 """Check that entries do not overlap or extend outside the section"""
293 self._ExpandEntries()
296 for entry in self._entries.values():
298 if (entry.offset < self._skip_at_start or
299 entry.offset + entry.size > self._skip_at_start +
301 entry.Raise('Offset %#x (%d) size %#x (%d) is outside the '
302 "section '%s' starting at %#x (%d) "
304 (entry.offset, entry.offset, entry.size, entry.size,
305 self._node.path, self._skip_at_start,
306 self._skip_at_start, self.size, self.size))
307 if entry.offset < offset and entry.size:
308 entry.Raise("Offset %#x (%d) overlaps with previous entry '%s' "
309 "ending at %#x (%d)" %
310 (entry.offset, entry.offset, prev_name, offset, offset))
311 offset = entry.offset + entry.size
312 prev_name = entry.GetPath()
314 def WriteSymbols(self, section):
315 """Write symbol values into binary files for access at run time"""
316 for entry in self._entries.values():
317 entry.WriteSymbols(self)
319 def SetCalculatedProperties(self):
320 super().SetCalculatedProperties()
321 for entry in self._entries.values():
322 entry.SetCalculatedProperties()
324 def SetImagePos(self, image_pos):
325 super().SetImagePos(image_pos)
326 for entry in self._entries.values():
327 entry.SetImagePos(image_pos + self.offset)
329 def ProcessContents(self):
330 sizes_ok_base = super(Entry_section, self).ProcessContents()
332 for entry in self._entries.values():
333 if not entry.ProcessContents():
335 return sizes_ok and sizes_ok_base
337 def CheckOffset(self):
340 def WriteMap(self, fd, indent):
341 """Write a map of the section to a .map file
344 fd: File to write the map to
346 Entry.WriteMapLine(fd, indent, self.name, self.offset or 0,
347 self.size, self.image_pos)
348 for entry in self._entries.values():
349 entry.WriteMap(fd, indent + 1)
351 def GetEntries(self):
354 def GetContentsByPhandle(self, phandle, source_entry):
355 """Get the data contents of an entry specified by a phandle
357 This uses a phandle to look up a node and and find the entry
358 associated with it. Then it returnst he contents of that entry.
361 phandle: Phandle to look up (integer)
362 source_entry: Entry containing that phandle (used for error
366 data from associated entry (as a string), or None if not found
368 node = self._node.GetFdt().LookupPhandle(phandle)
370 source_entry.Raise("Cannot find node for phandle %d" % phandle)
371 for entry in self._entries.values():
372 if entry._node == node:
373 return entry.GetData()
374 source_entry.Raise("Cannot find entry for node '%s'" % node.name)
376 def LookupSymbol(self, sym_name, optional, msg, base_addr):
377 """Look up a symbol in an ELF file
379 Looks up a symbol in an ELF file. Only entry types which come from an
380 ELF image can be used by this function.
382 At present the only entry properties supported are:
384 image_pos - 'base_addr' is added if this is not an end-at-4gb image
388 sym_name: Symbol name in the ELF file to look up in the format
389 _binman_<entry>_prop_<property> where <entry> is the name of
390 the entry and <property> is the property to find (e.g.
391 _binman_u_boot_prop_offset). As a special case, you can append
392 _any to <entry> to have it search for any matching entry. E.g.
393 _binman_u_boot_any_prop_offset will match entries called u-boot,
394 u-boot-img and u-boot-nodtb)
395 optional: True if the symbol is optional. If False this function
396 will raise if the symbol is not found
397 msg: Message to display if an error occurs
398 base_addr: Base address of image. This is added to the returned
399 image_pos in most cases so that the returned position indicates
400 where the targetted entry/binary has actually been loaded. But
401 if end-at-4gb is used, this is not done, since the binary is
402 already assumed to be linked to the ROM position and using
403 execute-in-place (XIP).
406 Value that should be assigned to that symbol, or None if it was
407 optional and not found
410 ValueError if the symbol is invalid or not found, or references a
411 property which is not supported
413 m = re.match(r'^_binman_(\w+)_prop_(\w+)$', sym_name)
415 raise ValueError("%s: Symbol '%s' has invalid format" %
417 entry_name, prop_name = m.groups()
418 entry_name = entry_name.replace('_', '-')
419 entry = self._entries.get(entry_name)
421 if entry_name.endswith('-any'):
422 root = entry_name[:-4]
423 for name in self._entries:
424 if name.startswith(root):
425 rest = name[len(root):]
426 if rest in ['', '-img', '-nodtb']:
427 entry = self._entries[name]
429 err = ("%s: Entry '%s' not found in list (%s)" %
430 (msg, entry_name, ','.join(self._entries.keys())))
432 print('Warning: %s' % err, file=sys.stderr)
434 raise ValueError(err)
435 if prop_name == 'offset':
437 elif prop_name == 'image_pos':
438 value = entry.image_pos
439 if not self.GetImage()._end_4gb:
442 if prop_name == 'size':
445 raise ValueError("%s: No such property '%s'" % (msg, prop_name))
447 def GetRootSkipAtStart(self):
448 """Get the skip-at-start value for the top-level section
450 This is used to find out the starting offset for root section that
451 contains this section. If this is a top-level section then it returns
452 the skip-at-start offset for this section.
454 This is used to get the absolute position of section within the image.
457 Integer skip-at-start value for the root section containing this
461 return self.section.GetRootSkipAtStart()
462 return self._skip_at_start
464 def GetStartOffset(self):
465 """Get the start offset for this section
468 The first available offset in this section (typically 0)
470 return self._skip_at_start
472 def GetImageSize(self):
473 """Get the size of the image containing this section
476 Image size as an integer number of bytes, which may be None if the
477 image size is dynamic and its sections have not yet been packed
479 return self.GetImage().size
481 def FindEntryType(self, etype):
482 """Find an entry type in the section
485 etype: Entry type to find
487 entry matching that type, or None if not found
489 for entry in self._entries.values():
490 if entry.etype == etype:
494 def GetEntryContents(self):
495 """Call ObtainContents() for each entry in the section
497 todo = self._entries.values()
498 for passnum in range(3):
501 if not entry.ObtainContents():
502 next_todo.append(entry)
507 self.Raise('Internal error: Could not complete processing of contents: remaining %s' %
511 def _SetEntryOffsetSize(self, name, offset, size):
512 """Set the offset and size of an entry
515 name: Entry name to update
516 offset: New offset, or None to leave alone
517 size: New size, or None to leave alone
519 entry = self._entries.get(name)
521 self._Raise("Unable to set offset/size for unknown entry '%s'" %
523 entry.SetOffsetSize(self._skip_at_start + offset if offset is not None
526 def GetEntryOffsets(self):
527 """Handle entries that want to set the offset/size of other entries
529 This calls each entry's GetOffsets() method. If it returns a list
530 of entries to update, it updates them.
532 for entry in self._entries.values():
533 offset_dict = entry.GetOffsets()
534 for name, info in offset_dict.items():
535 self._SetEntryOffsetSize(name, *info)
539 """Check that the section contents does not exceed its size, etc."""
541 for entry in self._entries.values():
542 contents_size = max(contents_size, entry.offset + entry.size)
544 contents_size -= self._skip_at_start
548 size = self.pad_before + contents_size + self.pad_after
549 size = tools.Align(size, self.align_size)
551 if self.size and contents_size > self.size:
552 self._Raise("contents size %#x (%d) exceeds section size %#x (%d)" %
553 (contents_size, contents_size, self.size, self.size))
556 if self.size != tools.Align(self.size, self.align_size):
557 self._Raise("Size %#x (%d) does not match align-size %#x (%d)" %
558 (self.size, self.size, self.align_size,
562 def ListEntries(self, entries, indent):
563 """List the files in the section"""
564 Entry.AddEntryInfo(entries, indent, self.name, 'section', self.size,
565 self.image_pos, None, self.offset, self)
566 for entry in self._entries.values():
567 entry.ListEntries(entries, indent + 1)
569 def LoadData(self, decomp=True):
570 for entry in self._entries.values():
571 entry.LoadData(decomp)
572 self.Detail('Loaded data')
575 """Get the image containing this section
577 Note that a top-level section is actually an Image, so this function may
581 Image object containing this section
585 return self.section.GetImage()
588 """Check if the entries in this section will be sorted
591 True if to be sorted, False if entries will be left in the order
592 they appear in the device tree
596 def ReadData(self, decomp=True):
597 tout.Info("ReadData path='%s'" % self.GetPath())
598 parent_data = self.section.ReadData(True)
599 tout.Info('%s: Reading data from offset %#x-%#x, size %#x' %
600 (self.GetPath(), self.offset, self.offset + self.size,
602 data = parent_data[self.offset:self.offset + self.size]
605 def ReadChildData(self, child, decomp=True):
606 tout.Debug("ReadChildData for child '%s'" % child.GetPath())
607 parent_data = self.ReadData(True)
608 offset = child.offset - self._skip_at_start
609 tout.Debug("Extract for child '%s': offset %#x, skip_at_start %#x, result %#x" %
610 (child.GetPath(), child.offset, self._skip_at_start, offset))
611 data = parent_data[offset:offset + child.size]
614 data = tools.Decompress(indata, child.compress)
615 if child.uncomp_size:
616 tout.Info("%s: Decompressing data size %#x with algo '%s' to data size %#x" %
617 (child.GetPath(), len(indata), child.compress,
621 def WriteChildData(self, child):
624 def SetAllowMissing(self, allow_missing):
625 """Set whether a section allows missing external blobs
628 allow_missing: True if allowed, False if not allowed
630 self.allow_missing = allow_missing
631 for entry in self._entries.values():
632 entry.SetAllowMissing(allow_missing)
634 def CheckMissing(self, missing_list):
635 """Check if any entries in this section have missing external blobs
637 If there are missing blobs, the entries are added to the list
640 missing_list: List of Entry objects to be added to
642 for entry in self._entries.values():
643 entry.CheckMissing(missing_list)