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, have_image_pos):
140 """Add new properties to the device tree as needed for this entry"""
141 super().AddMissingProperties(have_image_pos)
142 if self.compress != 'none':
143 have_image_pos = False
144 for entry in self._entries.values():
145 entry.AddMissingProperties(have_image_pos)
147 def ObtainContents(self):
148 return self.GetEntryContents()
150 def GetPaddedDataForEntry(self, entry, entry_data):
151 """Get the data for an entry including any padding
153 Gets the entry data and uses the section pad-byte value to add padding
154 before and after as defined by the pad-before and pad-after properties.
155 This does not consider alignment.
158 entry: Entry to check
161 Contents of the entry along with any pad bytes before and
164 pad_byte = (entry._pad_byte if isinstance(entry, Entry_section)
168 # Handle padding before the entry
170 data += tools.GetBytes(self._pad_byte, entry.pad_before)
172 # Add in the actual entry data
175 # Handle padding after the entry
177 data += tools.GetBytes(self._pad_byte, entry.pad_after)
180 data += tools.GetBytes(pad_byte, entry.size - len(data))
182 self.Detail('GetPaddedDataForEntry: size %s' % ToHexSize(self.data))
186 def _BuildSectionData(self):
187 """Build the contents of a section
189 This places all entries at the right place, dealing with padding before
190 and after entries. It does not do padding for the section itself (the
191 pad-before and pad-after properties in the section items) since that is
192 handled by the parent section.
195 Contents of the section (bytes)
199 for entry in self._entries.values():
200 data = self.GetPaddedDataForEntry(entry, entry.GetData())
201 # Handle empty space before the entry
202 pad = (entry.offset or 0) - self._skip_at_start - len(section_data)
204 section_data += tools.GetBytes(self._pad_byte, pad)
206 # Add in the actual entry data
209 self.Detail('GetData: %d entries, total size %#x' %
210 (len(self._entries), len(section_data)))
211 return self.CompressData(section_data)
213 def GetPaddedData(self, data=None):
214 """Get the data for a section including any padding
216 Gets the section data and uses the parent section's pad-byte value to
217 add padding before and after as defined by the pad-before and pad-after
218 properties. If this is a top-level section (i.e. an image), this is the
219 same as GetData(), since padding is not supported.
221 This does not consider alignment.
224 Contents of the section along with any pad bytes before and
227 section = self.section or self
229 data = self.GetData()
230 return section.GetPaddedDataForEntry(self, data)
233 """Get the contents of an entry
235 This builds the contents of the section, stores this as the contents of
236 the section and returns it
239 bytes content of the section, made up for all all of its subentries.
240 This excludes any padding. If the section is compressed, the
241 compressed data is returned
243 data = self._BuildSectionData()
244 self.SetContents(data)
247 def GetOffsets(self):
248 """Handle entries that want to set the offset/size of other entries
250 This calls each entry's GetOffsets() method. If it returns a list
251 of entries to update, it updates them.
253 self.GetEntryOffsets()
256 def ResetForPack(self):
257 """Reset offset/size fields so that packing can be done again"""
258 super().ResetForPack()
259 for entry in self._entries.values():
262 def Pack(self, offset):
263 """Pack all entries into the section"""
267 self._ExpandEntries()
269 data = self._BuildSectionData()
270 self.SetContents(data)
274 offset = super().Pack(offset)
278 def _PackEntries(self):
279 """Pack all entries into the section"""
280 offset = self._skip_at_start
281 for entry in self._entries.values():
282 offset = entry.Pack(offset)
285 def _ExpandEntries(self):
286 """Expand any entries that are permitted to"""
288 for entry in self._entries.values():
290 exp_entry.ExpandToLimit(entry.offset)
292 if entry.expand_size:
295 exp_entry.ExpandToLimit(self.size)
297 def _SortEntries(self):
298 """Sort entries by offset"""
299 entries = sorted(self._entries.values(), key=lambda entry: entry.offset)
300 self._entries.clear()
301 for entry in entries:
302 self._entries[entry._node.name] = entry
304 def CheckEntries(self):
305 """Check that entries do not overlap or extend outside the section"""
306 max_size = self.size if self.uncomp_size is None else self.uncomp_size
310 for entry in self._entries.values():
312 if (entry.offset < self._skip_at_start or
313 entry.offset + entry.size > self._skip_at_start +
315 entry.Raise('Offset %#x (%d) size %#x (%d) is outside the '
316 "section '%s' starting at %#x (%d) "
318 (entry.offset, entry.offset, entry.size, entry.size,
319 self._node.path, self._skip_at_start,
320 self._skip_at_start, max_size, max_size))
321 if entry.offset < offset and entry.size:
322 entry.Raise("Offset %#x (%d) overlaps with previous entry '%s' "
323 "ending at %#x (%d)" %
324 (entry.offset, entry.offset, prev_name, offset, offset))
325 offset = entry.offset + entry.size
326 prev_name = entry.GetPath()
328 def WriteSymbols(self, section):
329 """Write symbol values into binary files for access at run time"""
330 for entry in self._entries.values():
331 entry.WriteSymbols(self)
333 def SetCalculatedProperties(self):
334 super().SetCalculatedProperties()
335 for entry in self._entries.values():
336 entry.SetCalculatedProperties()
338 def SetImagePos(self, image_pos):
339 super().SetImagePos(image_pos)
340 if self.compress == 'none':
341 for entry in self._entries.values():
342 entry.SetImagePos(image_pos + self.offset)
344 def ProcessContents(self):
345 sizes_ok_base = super(Entry_section, self).ProcessContents()
347 for entry in self._entries.values():
348 if not entry.ProcessContents():
350 return sizes_ok and sizes_ok_base
352 def WriteMap(self, fd, indent):
353 """Write a map of the section to a .map file
356 fd: File to write the map to
358 Entry.WriteMapLine(fd, indent, self.name, self.offset or 0,
359 self.size, self.image_pos)
360 for entry in self._entries.values():
361 entry.WriteMap(fd, indent + 1)
363 def GetEntries(self):
366 def GetContentsByPhandle(self, phandle, source_entry):
367 """Get the data contents of an entry specified by a phandle
369 This uses a phandle to look up a node and and find the entry
370 associated with it. Then it returnst he contents of that entry.
373 phandle: Phandle to look up (integer)
374 source_entry: Entry containing that phandle (used for error
378 data from associated entry (as a string), or None if not found
380 node = self._node.GetFdt().LookupPhandle(phandle)
382 source_entry.Raise("Cannot find node for phandle %d" % phandle)
383 for entry in self._entries.values():
384 if entry._node == node:
385 return entry.GetData()
386 source_entry.Raise("Cannot find entry for node '%s'" % node.name)
388 def LookupSymbol(self, sym_name, optional, msg, base_addr):
389 """Look up a symbol in an ELF file
391 Looks up a symbol in an ELF file. Only entry types which come from an
392 ELF image can be used by this function.
394 At present the only entry properties supported are:
396 image_pos - 'base_addr' is added if this is not an end-at-4gb image
400 sym_name: Symbol name in the ELF file to look up in the format
401 _binman_<entry>_prop_<property> where <entry> is the name of
402 the entry and <property> is the property to find (e.g.
403 _binman_u_boot_prop_offset). As a special case, you can append
404 _any to <entry> to have it search for any matching entry. E.g.
405 _binman_u_boot_any_prop_offset will match entries called u-boot,
406 u-boot-img and u-boot-nodtb)
407 optional: True if the symbol is optional. If False this function
408 will raise if the symbol is not found
409 msg: Message to display if an error occurs
410 base_addr: Base address of image. This is added to the returned
411 image_pos in most cases so that the returned position indicates
412 where the targetted entry/binary has actually been loaded. But
413 if end-at-4gb is used, this is not done, since the binary is
414 already assumed to be linked to the ROM position and using
415 execute-in-place (XIP).
418 Value that should be assigned to that symbol, or None if it was
419 optional and not found
422 ValueError if the symbol is invalid or not found, or references a
423 property which is not supported
425 m = re.match(r'^_binman_(\w+)_prop_(\w+)$', sym_name)
427 raise ValueError("%s: Symbol '%s' has invalid format" %
429 entry_name, prop_name = m.groups()
430 entry_name = entry_name.replace('_', '-')
431 entry = self._entries.get(entry_name)
433 if entry_name.endswith('-any'):
434 root = entry_name[:-4]
435 for name in self._entries:
436 if name.startswith(root):
437 rest = name[len(root):]
438 if rest in ['', '-img', '-nodtb']:
439 entry = self._entries[name]
441 err = ("%s: Entry '%s' not found in list (%s)" %
442 (msg, entry_name, ','.join(self._entries.keys())))
444 print('Warning: %s' % err, file=sys.stderr)
446 raise ValueError(err)
447 if prop_name == 'offset':
449 elif prop_name == 'image_pos':
450 value = entry.image_pos
451 if not self.GetImage()._end_4gb:
454 if prop_name == 'size':
457 raise ValueError("%s: No such property '%s'" % (msg, prop_name))
459 def GetRootSkipAtStart(self):
460 """Get the skip-at-start value for the top-level section
462 This is used to find out the starting offset for root section that
463 contains this section. If this is a top-level section then it returns
464 the skip-at-start offset for this section.
466 This is used to get the absolute position of section within the image.
469 Integer skip-at-start value for the root section containing this
473 return self.section.GetRootSkipAtStart()
474 return self._skip_at_start
476 def GetStartOffset(self):
477 """Get the start offset for this section
480 The first available offset in this section (typically 0)
482 return self._skip_at_start
484 def GetImageSize(self):
485 """Get the size of the image containing this section
488 Image size as an integer number of bytes, which may be None if the
489 image size is dynamic and its sections have not yet been packed
491 return self.GetImage().size
493 def FindEntryType(self, etype):
494 """Find an entry type in the section
497 etype: Entry type to find
499 entry matching that type, or None if not found
501 for entry in self._entries.values():
502 if entry.etype == etype:
506 def GetEntryContents(self):
507 """Call ObtainContents() for each entry in the section
509 todo = self._entries.values()
510 for passnum in range(3):
513 if not entry.ObtainContents():
514 next_todo.append(entry)
519 self.Raise('Internal error: Could not complete processing of contents: remaining %s' %
523 def _SetEntryOffsetSize(self, name, offset, size):
524 """Set the offset and size of an entry
527 name: Entry name to update
528 offset: New offset, or None to leave alone
529 size: New size, or None to leave alone
531 entry = self._entries.get(name)
533 self._Raise("Unable to set offset/size for unknown entry '%s'" %
535 entry.SetOffsetSize(self._skip_at_start + offset if offset is not None
538 def GetEntryOffsets(self):
539 """Handle entries that want to set the offset/size of other entries
541 This calls each entry's GetOffsets() method. If it returns a list
542 of entries to update, it updates them.
544 for entry in self._entries.values():
545 offset_dict = entry.GetOffsets()
546 for name, info in offset_dict.items():
547 self._SetEntryOffsetSize(name, *info)
550 contents_size = len(self.data)
554 data = self.GetPaddedData(self.data)
556 size = tools.Align(size, self.align_size)
558 if self.size and contents_size > self.size:
559 self._Raise("contents size %#x (%d) exceeds section size %#x (%d)" %
560 (contents_size, contents_size, self.size, self.size))
563 if self.size != tools.Align(self.size, self.align_size):
564 self._Raise("Size %#x (%d) does not match align-size %#x (%d)" %
565 (self.size, self.size, self.align_size,
569 def ListEntries(self, entries, indent):
570 """List the files in the section"""
571 Entry.AddEntryInfo(entries, indent, self.name, 'section', self.size,
572 self.image_pos, None, self.offset, self)
573 for entry in self._entries.values():
574 entry.ListEntries(entries, indent + 1)
576 def LoadData(self, decomp=True):
577 for entry in self._entries.values():
578 entry.LoadData(decomp)
579 self.Detail('Loaded data')
582 """Get the image containing this section
584 Note that a top-level section is actually an Image, so this function may
588 Image object containing this section
592 return self.section.GetImage()
595 """Check if the entries in this section will be sorted
598 True if to be sorted, False if entries will be left in the order
599 they appear in the device tree
603 def ReadData(self, decomp=True):
604 tout.Info("ReadData path='%s'" % self.GetPath())
605 parent_data = self.section.ReadData(True)
606 tout.Info('%s: Reading data from offset %#x-%#x, size %#x' %
607 (self.GetPath(), self.offset, self.offset + self.size,
609 data = parent_data[self.offset:self.offset + self.size]
612 def ReadChildData(self, child, decomp=True):
613 tout.Debug("ReadChildData for child '%s'" % child.GetPath())
614 parent_data = self.ReadData(True)
615 offset = child.offset - self._skip_at_start
616 tout.Debug("Extract for child '%s': offset %#x, skip_at_start %#x, result %#x" %
617 (child.GetPath(), child.offset, self._skip_at_start, offset))
618 data = parent_data[offset:offset + child.size]
621 data = tools.Decompress(indata, child.compress)
622 if child.uncomp_size:
623 tout.Info("%s: Decompressing data size %#x with algo '%s' to data size %#x" %
624 (child.GetPath(), len(indata), child.compress,
628 def WriteChildData(self, child):
631 def SetAllowMissing(self, allow_missing):
632 """Set whether a section allows missing external blobs
635 allow_missing: True if allowed, False if not allowed
637 self.allow_missing = allow_missing
638 for entry in self._entries.values():
639 entry.SetAllowMissing(allow_missing)
641 def CheckMissing(self, missing_list):
642 """Check if any entries in this section have missing external blobs
644 If there are missing blobs, the entries are added to the list
647 missing_list: List of Entry objects to be added to
649 for entry in self._entries.values():
650 entry.CheckMissing(missing_list)