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
163 # Handle padding before the entry
165 data += tools.GetBytes(self._pad_byte, entry.pad_before)
167 # Add in the actual entry data
168 data += entry.GetData()
170 # Handle padding after the entry
172 data += tools.GetBytes(self._pad_byte, entry.pad_after)
174 self.Detail('GetPaddedDataForEntry: size %s' % ToHexSize(self.data))
178 def _BuildSectionData(self):
179 """Build the contents of a section
181 This places all entries at the right place, dealing with padding before
182 and after entries. It does not do padding for the section itself (the
183 pad-before and pad-after properties in the section items) since that is
184 handled by the parent section.
187 Contents of the section (bytes)
191 for entry in self._entries.values():
192 data = self.GetPaddedDataForEntry(entry)
193 # Handle empty space before the entry
194 pad = (entry.offset or 0) - self._skip_at_start - len(section_data)
196 section_data += tools.GetBytes(self._pad_byte, pad)
198 # Add in the actual entry data
202 section_data += tools.GetBytes(self._pad_byte,
203 self.size - len(section_data))
204 self.Detail('GetData: %d entries, total size %#x' %
205 (len(self._entries), len(section_data)))
206 return self.CompressData(section_data)
208 def GetPaddedData(self):
209 """Get the data for a section including any padding
211 Gets the section data and uses the parent section's pad-byte value to
212 add padding before and after as defined by the pad-before and pad-after
213 properties. If this is a top-level section (i.e. an image), this is the
214 same as GetData(), since padding is not supported.
216 This does not consider alignment.
219 Contents of the section along with any pad bytes before and
223 return super().GetPaddedData()
224 return self.GetData()
227 return self._BuildSectionData()
229 def GetOffsets(self):
230 """Handle entries that want to set the offset/size of other entries
232 This calls each entry's GetOffsets() method. If it returns a list
233 of entries to update, it updates them.
235 self.GetEntryOffsets()
238 def ResetForPack(self):
239 """Reset offset/size fields so that packing can be done again"""
240 super().ResetForPack()
241 for entry in self._entries.values():
244 def Pack(self, offset):
245 """Pack all entries into the section"""
247 return super().Pack(offset)
249 def _PackEntries(self):
250 """Pack all entries into the section"""
251 offset = self._skip_at_start
252 for entry in self._entries.values():
253 offset = entry.Pack(offset)
254 self.size = self.CheckSize()
256 def _ExpandEntries(self):
257 """Expand any entries that are permitted to"""
259 for entry in self._entries.values():
261 exp_entry.ExpandToLimit(entry.offset)
263 if entry.expand_size:
266 exp_entry.ExpandToLimit(self.size)
268 def _SortEntries(self):
269 """Sort entries by offset"""
270 entries = sorted(self._entries.values(), key=lambda entry: entry.offset)
271 self._entries.clear()
272 for entry in entries:
273 self._entries[entry._node.name] = entry
275 def CheckEntries(self):
276 """Check that entries do not overlap or extend outside the section"""
279 self._ExpandEntries()
282 for entry in self._entries.values():
284 if (entry.offset < self._skip_at_start or
285 entry.offset + entry.size > self._skip_at_start +
287 entry.Raise('Offset %#x (%d) size %#x (%d) is outside the '
288 "section '%s' starting at %#x (%d) "
290 (entry.offset, entry.offset, entry.size, entry.size,
291 self._node.path, self._skip_at_start,
292 self._skip_at_start, self.size, self.size))
293 if entry.offset < offset and entry.size:
294 entry.Raise("Offset %#x (%d) overlaps with previous entry '%s' "
295 "ending at %#x (%d)" %
296 (entry.offset, entry.offset, prev_name, offset, offset))
297 offset = entry.offset + entry.size
298 prev_name = entry.GetPath()
300 def WriteSymbols(self, section):
301 """Write symbol values into binary files for access at run time"""
302 for entry in self._entries.values():
303 entry.WriteSymbols(self)
305 def SetCalculatedProperties(self):
306 super().SetCalculatedProperties()
307 for entry in self._entries.values():
308 entry.SetCalculatedProperties()
310 def SetImagePos(self, image_pos):
311 super().SetImagePos(image_pos)
312 for entry in self._entries.values():
313 entry.SetImagePos(image_pos + self.offset)
315 def ProcessContents(self):
316 sizes_ok_base = super(Entry_section, self).ProcessContents()
318 for entry in self._entries.values():
319 if not entry.ProcessContents():
321 return sizes_ok and sizes_ok_base
323 def CheckOffset(self):
326 def WriteMap(self, fd, indent):
327 """Write a map of the section to a .map file
330 fd: File to write the map to
332 Entry.WriteMapLine(fd, indent, self.name, self.offset or 0,
333 self.size, self.image_pos)
334 for entry in self._entries.values():
335 entry.WriteMap(fd, indent + 1)
337 def GetEntries(self):
340 def GetContentsByPhandle(self, phandle, source_entry):
341 """Get the data contents of an entry specified by a phandle
343 This uses a phandle to look up a node and and find the entry
344 associated with it. Then it returnst he contents of that entry.
347 phandle: Phandle to look up (integer)
348 source_entry: Entry containing that phandle (used for error
352 data from associated entry (as a string), or None if not found
354 node = self._node.GetFdt().LookupPhandle(phandle)
356 source_entry.Raise("Cannot find node for phandle %d" % phandle)
357 for entry in self._entries.values():
358 if entry._node == node:
359 return entry.GetData()
360 source_entry.Raise("Cannot find entry for node '%s'" % node.name)
362 def LookupSymbol(self, sym_name, optional, msg, base_addr):
363 """Look up a symbol in an ELF file
365 Looks up a symbol in an ELF file. Only entry types which come from an
366 ELF image can be used by this function.
368 At present the only entry properties supported are:
370 image_pos - 'base_addr' is added if this is not an end-at-4gb image
374 sym_name: Symbol name in the ELF file to look up in the format
375 _binman_<entry>_prop_<property> where <entry> is the name of
376 the entry and <property> is the property to find (e.g.
377 _binman_u_boot_prop_offset). As a special case, you can append
378 _any to <entry> to have it search for any matching entry. E.g.
379 _binman_u_boot_any_prop_offset will match entries called u-boot,
380 u-boot-img and u-boot-nodtb)
381 optional: True if the symbol is optional. If False this function
382 will raise if the symbol is not found
383 msg: Message to display if an error occurs
384 base_addr: Base address of image. This is added to the returned
385 image_pos in most cases so that the returned position indicates
386 where the targetted entry/binary has actually been loaded. But
387 if end-at-4gb is used, this is not done, since the binary is
388 already assumed to be linked to the ROM position and using
389 execute-in-place (XIP).
392 Value that should be assigned to that symbol, or None if it was
393 optional and not found
396 ValueError if the symbol is invalid or not found, or references a
397 property which is not supported
399 m = re.match(r'^_binman_(\w+)_prop_(\w+)$', sym_name)
401 raise ValueError("%s: Symbol '%s' has invalid format" %
403 entry_name, prop_name = m.groups()
404 entry_name = entry_name.replace('_', '-')
405 entry = self._entries.get(entry_name)
407 if entry_name.endswith('-any'):
408 root = entry_name[:-4]
409 for name in self._entries:
410 if name.startswith(root):
411 rest = name[len(root):]
412 if rest in ['', '-img', '-nodtb']:
413 entry = self._entries[name]
415 err = ("%s: Entry '%s' not found in list (%s)" %
416 (msg, entry_name, ','.join(self._entries.keys())))
418 print('Warning: %s' % err, file=sys.stderr)
420 raise ValueError(err)
421 if prop_name == 'offset':
423 elif prop_name == 'image_pos':
424 value = entry.image_pos
425 if not self.GetImage()._end_4gb:
428 if prop_name == 'size':
431 raise ValueError("%s: No such property '%s'" % (msg, prop_name))
433 def GetRootSkipAtStart(self):
434 """Get the skip-at-start value for the top-level section
436 This is used to find out the starting offset for root section that
437 contains this section. If this is a top-level section then it returns
438 the skip-at-start offset for this section.
440 This is used to get the absolute position of section within the image.
443 Integer skip-at-start value for the root section containing this
447 return self.section.GetRootSkipAtStart()
448 return self._skip_at_start
450 def GetStartOffset(self):
451 """Get the start offset for this section
454 The first available offset in this section (typically 0)
456 return self._skip_at_start
458 def GetImageSize(self):
459 """Get the size of the image containing this section
462 Image size as an integer number of bytes, which may be None if the
463 image size is dynamic and its sections have not yet been packed
465 return self.GetImage().size
467 def FindEntryType(self, etype):
468 """Find an entry type in the section
471 etype: Entry type to find
473 entry matching that type, or None if not found
475 for entry in self._entries.values():
476 if entry.etype == etype:
480 def GetEntryContents(self):
481 """Call ObtainContents() for each entry in the section
483 todo = self._entries.values()
484 for passnum in range(3):
487 if not entry.ObtainContents():
488 next_todo.append(entry)
493 self.Raise('Internal error: Could not complete processing of contents: remaining %s' %
497 def _SetEntryOffsetSize(self, name, offset, size):
498 """Set the offset and size of an entry
501 name: Entry name to update
502 offset: New offset, or None to leave alone
503 size: New size, or None to leave alone
505 entry = self._entries.get(name)
507 self._Raise("Unable to set offset/size for unknown entry '%s'" %
509 entry.SetOffsetSize(self._skip_at_start + offset if offset is not None
512 def GetEntryOffsets(self):
513 """Handle entries that want to set the offset/size of other entries
515 This calls each entry's GetOffsets() method. If it returns a list
516 of entries to update, it updates them.
518 for entry in self._entries.values():
519 offset_dict = entry.GetOffsets()
520 for name, info in offset_dict.items():
521 self._SetEntryOffsetSize(name, *info)
525 """Check that the section contents does not exceed its size, etc."""
527 for entry in self._entries.values():
528 contents_size = max(contents_size, entry.offset + entry.size)
530 contents_size -= self._skip_at_start
534 size = self.pad_before + contents_size + self.pad_after
535 size = tools.Align(size, self.align_size)
537 if self.size and contents_size > self.size:
538 self._Raise("contents size %#x (%d) exceeds section size %#x (%d)" %
539 (contents_size, contents_size, self.size, self.size))
542 if self.size != tools.Align(self.size, self.align_size):
543 self._Raise("Size %#x (%d) does not match align-size %#x (%d)" %
544 (self.size, self.size, self.align_size,
548 def ListEntries(self, entries, indent):
549 """List the files in the section"""
550 Entry.AddEntryInfo(entries, indent, self.name, 'section', self.size,
551 self.image_pos, None, self.offset, self)
552 for entry in self._entries.values():
553 entry.ListEntries(entries, indent + 1)
555 def LoadData(self, decomp=True):
556 for entry in self._entries.values():
557 entry.LoadData(decomp)
558 self.Detail('Loaded data')
561 """Get the image containing this section
563 Note that a top-level section is actually an Image, so this function may
567 Image object containing this section
571 return self.section.GetImage()
574 """Check if the entries in this section will be sorted
577 True if to be sorted, False if entries will be left in the order
578 they appear in the device tree
582 def ReadData(self, decomp=True):
583 tout.Info("ReadData path='%s'" % self.GetPath())
584 parent_data = self.section.ReadData(True)
585 tout.Info('%s: Reading data from offset %#x-%#x, size %#x' %
586 (self.GetPath(), self.offset, self.offset + self.size,
588 data = parent_data[self.offset:self.offset + self.size]
591 def ReadChildData(self, child, decomp=True):
592 tout.Debug("ReadChildData for child '%s'" % child.GetPath())
593 parent_data = self.ReadData(True)
594 offset = child.offset - self._skip_at_start
595 tout.Debug("Extract for child '%s': offset %#x, skip_at_start %#x, result %#x" %
596 (child.GetPath(), child.offset, self._skip_at_start, offset))
597 data = parent_data[offset:offset + child.size]
600 data = tools.Decompress(indata, child.compress)
601 if child.uncomp_size:
602 tout.Info("%s: Decompressing data size %#x with algo '%s' to data size %#x" %
603 (child.GetPath(), len(indata), child.compress,
607 def WriteChildData(self, child):
610 def SetAllowMissing(self, allow_missing):
611 """Set whether a section allows missing external blobs
614 allow_missing: True if allowed, False if not allowed
616 self.allow_missing = allow_missing
617 for entry in self._entries.values():
618 entry.SetAllowMissing(allow_missing)
620 def CheckMissing(self, missing_list):
621 """Check if any entries in this section have missing external blobs
623 If there are missing blobs, the entries are added to the list
626 missing_list: List of Entry objects to be added to
628 for entry in self._entries.values():
629 entry.CheckMissing(missing_list)