| # SPDX-License-Identifier: GPL-2.0+ |
| # Copyright (c) 2016 Google, Inc |
| # |
| # Base class for all entries |
| # |
| |
| from collections import namedtuple |
| import importlib |
| import os |
| import pathlib |
| import sys |
| import time |
| |
| from binman import bintool |
| from binman import elf |
| from dtoc import fdt_util |
| from patman import tools |
| from patman.tools import to_hex, to_hex_size |
| from patman import tout |
| |
| modules = {} |
| |
| # This is imported if needed |
| state = None |
| |
| # An argument which can be passed to entries on the command line, in lieu of |
| # device-tree properties. |
| EntryArg = namedtuple('EntryArg', ['name', 'datatype']) |
| |
| # Information about an entry for use when displaying summaries |
| EntryInfo = namedtuple('EntryInfo', ['indent', 'name', 'etype', 'size', |
| 'image_pos', 'uncomp_size', 'offset', |
| 'entry']) |
| |
| class Entry(object): |
| """An Entry in the section |
| |
| An entry corresponds to a single node in the device-tree description |
| of the section. Each entry ends up being a part of the final section. |
| Entries can be placed either right next to each other, or with padding |
| between them. The type of the entry determines the data that is in it. |
| |
| This class is not used by itself. All entry objects are subclasses of |
| Entry. |
| |
| Attributes: |
| section: Section object containing this entry |
| node: The node that created this entry |
| offset: Offset of entry within the section, None if not known yet (in |
| which case it will be calculated by Pack()) |
| size: Entry size in bytes, None if not known |
| pre_reset_size: size as it was before ResetForPack(). This allows us to |
| keep track of the size we started with and detect size changes |
| uncomp_size: Size of uncompressed data in bytes, if the entry is |
| compressed, else None |
| contents_size: Size of contents in bytes, 0 by default |
| align: Entry start offset alignment relative to the start of the |
| containing section, or None |
| align_size: Entry size alignment, or None |
| align_end: Entry end offset alignment relative to the start of the |
| containing section, or None |
| pad_before: Number of pad bytes before the contents when it is placed |
| in the containing section, 0 if none. The pad bytes become part of |
| the entry. |
| pad_after: Number of pad bytes after the contents when it is placed in |
| the containing section, 0 if none. The pad bytes become part of |
| the entry. |
| data: Contents of entry (string of bytes). This does not include |
| padding created by pad_before or pad_after. If the entry is |
| compressed, this contains the compressed data. |
| uncomp_data: Original uncompressed data, if this entry is compressed, |
| else None |
| compress: Compression algoithm used (e.g. 'lz4'), 'none' if none |
| orig_offset: Original offset value read from node |
| orig_size: Original size value read from node |
| missing: True if this entry is missing its contents. Note that if it is |
| optional, this entry will not appear in the list generated by |
| entry.CheckMissing() since it is considered OK for it to be missing. |
| allow_missing: Allow children of this entry to be missing (used by |
| subclasses such as Entry_section) |
| allow_fake: Allow creating a dummy fake file if the blob file is not |
| available. This is mainly used for testing. |
| external: True if this entry contains an external binary blob |
| bintools: Bintools used by this entry (only populated for Image) |
| missing_bintools: List of missing bintools for this entry |
| update_hash: True if this entry's "hash" subnode should be |
| updated with a hash of the entry contents |
| comp_bintool: Bintools used for compress and decompress data |
| fake_fname: Fake filename, if one was created, else None |
| required_props (dict of str): Properties which must be present. This can |
| be added to by subclasses |
| elf_fname (str): Filename of the ELF file, if this entry holds an ELF |
| file, or is a binary file produced from an ELF file |
| auto_write_symbols (bool): True to write ELF symbols into this entry's |
| contents |
| absent (bool): True if this entry is absent. This can be controlled by |
| the entry itself, allowing it to vanish in certain circumstances. |
| An absent entry is removed during processing so that it does not |
| appear in the map |
| optional (bool): True if this entry contains an optional external blob |
| """ |
| fake_dir = None |
| |
| def __init__(self, section, etype, node, name_prefix='', |
| auto_write_symbols=False): |
| # Put this here to allow entry-docs and help to work without libfdt |
| global state |
| from binman import state |
| |
| self.section = section |
| self.etype = etype |
| self._node = node |
| self.name = node and (name_prefix + node.name) or 'none' |
| self.offset = None |
| self.size = None |
| self.pre_reset_size = None |
| self.uncomp_size = None |
| self.data = None |
| self.uncomp_data = None |
| self.contents_size = 0 |
| self.align = None |
| self.align_size = None |
| self.align_end = None |
| self.pad_before = 0 |
| self.pad_after = 0 |
| self.offset_unset = False |
| self.image_pos = None |
| self.extend_size = False |
| self.compress = 'none' |
| self.missing = False |
| self.faked = False |
| self.external = False |
| self.allow_missing = False |
| self.allow_fake = False |
| self.bintools = {} |
| self.missing_bintools = [] |
| self.update_hash = True |
| self.fake_fname = None |
| self.required_props = [] |
| self.comp_bintool = None |
| self.elf_fname = None |
| self.auto_write_symbols = auto_write_symbols |
| self.absent = False |
| self.optional = False |
| |
| @staticmethod |
| def FindEntryClass(etype, expanded): |
| """Look up the entry class for a node. |
| |
| Args: |
| node_node: Path name of Node object containing information about |
| the entry to create (used for errors) |
| etype: Entry type to use |
| expanded: Use the expanded version of etype |
| |
| Returns: |
| The entry class object if found, else None if not found and expanded |
| is True, else a tuple: |
| module name that could not be found |
| exception received |
| """ |
| # Convert something like 'u-boot@0' to 'u_boot' since we are only |
| # interested in the type. |
| module_name = etype.replace('-', '_') |
| |
| if '@' in module_name: |
| module_name = module_name.split('@')[0] |
| if expanded: |
| module_name += '_expanded' |
| module = modules.get(module_name) |
| |
| # Also allow entry-type modules to be brought in from the etype directory. |
| |
| # Import the module if we have not already done so. |
| if not module: |
| try: |
| module = importlib.import_module('binman.etype.' + module_name) |
| except ImportError as e: |
| if expanded: |
| return None |
| return module_name, e |
| modules[module_name] = module |
| |
| # Look up the expected class name |
| return getattr(module, 'Entry_%s' % module_name) |
| |
| @staticmethod |
| def Lookup(node_path, etype, expanded, missing_etype=False): |
| """Look up the entry class for a node. |
| |
| Args: |
| node_node (str): Path name of Node object containing information |
| about the entry to create (used for errors) |
| etype (str): Entry type to use |
| expanded (bool): Use the expanded version of etype |
| missing_etype (bool): True to default to a blob etype if the |
| requested etype is not found |
| |
| Returns: |
| The entry class object if found, else None if not found and expanded |
| is True |
| |
| Raise: |
| ValueError if expanded is False and the class is not found |
| """ |
| # Convert something like 'u-boot@0' to 'u_boot' since we are only |
| # interested in the type. |
| cls = Entry.FindEntryClass(etype, expanded) |
| if cls is None: |
| return None |
| elif isinstance(cls, tuple): |
| if missing_etype: |
| cls = Entry.FindEntryClass('blob', False) |
| if isinstance(cls, tuple): # This should not fail |
| module_name, e = cls |
| raise ValueError( |
| "Unknown entry type '%s' in node '%s' (expected etype/%s.py, error '%s'" % |
| (etype, node_path, module_name, e)) |
| return cls |
| |
| @staticmethod |
| def Create(section, node, etype=None, expanded=False, missing_etype=False): |
| """Create a new entry for a node. |
| |
| Args: |
| section (entry_Section): Section object containing this node |
| node (Node): Node object containing information about the entry to |
| create |
| etype (str): Entry type to use, or None to work it out (used for |
| tests) |
| expanded (bool): Use the expanded version of etype |
| missing_etype (bool): True to default to a blob etype if the |
| requested etype is not found |
| |
| Returns: |
| A new Entry object of the correct type (a subclass of Entry) |
| """ |
| if not etype: |
| etype = fdt_util.GetString(node, 'type', node.name) |
| obj = Entry.Lookup(node.path, etype, expanded, missing_etype) |
| if obj and expanded: |
| # Check whether to use the expanded entry |
| new_etype = etype + '-expanded' |
| can_expand = not fdt_util.GetBool(node, 'no-expanded') |
| if can_expand and obj.UseExpanded(node, etype, new_etype): |
| etype = new_etype |
| else: |
| obj = None |
| if not obj: |
| obj = Entry.Lookup(node.path, etype, False, missing_etype) |
| |
| # Call its constructor to get the object we want. |
| return obj(section, etype, node) |
| |
| def ReadNode(self): |
| """Read entry information from the node |
| |
| This must be called as the first thing after the Entry is created. |
| |
| This reads all the fields we recognise from the node, ready for use. |
| """ |
| self.ensure_props() |
| if 'pos' in self._node.props: |
| self.Raise("Please use 'offset' instead of 'pos'") |
| if 'expand-size' in self._node.props: |
| self.Raise("Please use 'extend-size' instead of 'expand-size'") |
| self.offset = fdt_util.GetInt(self._node, 'offset') |
| self.size = fdt_util.GetInt(self._node, 'size') |
| self.orig_offset = fdt_util.GetInt(self._node, 'orig-offset') |
| self.orig_size = fdt_util.GetInt(self._node, 'orig-size') |
| if self.GetImage().copy_to_orig: |
| self.orig_offset = self.offset |
| self.orig_size = self.size |
| |
| # These should not be set in input files, but are set in an FDT map, |
| # which is also read by this code. |
| self.image_pos = fdt_util.GetInt(self._node, 'image-pos') |
| self.uncomp_size = fdt_util.GetInt(self._node, 'uncomp-size') |
| |
| self.align = fdt_util.GetInt(self._node, 'align') |
| if tools.not_power_of_two(self.align): |
| raise ValueError("Node '%s': Alignment %s must be a power of two" % |
| (self._node.path, self.align)) |
| if self.section and self.align is None: |
| self.align = self.section.align_default |
| self.pad_before = fdt_util.GetInt(self._node, 'pad-before', 0) |
| self.pad_after = fdt_util.GetInt(self._node, 'pad-after', 0) |
| self.align_size = fdt_util.GetInt(self._node, 'align-size') |
| if tools.not_power_of_two(self.align_size): |
| self.Raise("Alignment size %s must be a power of two" % |
| self.align_size) |
| self.align_end = fdt_util.GetInt(self._node, 'align-end') |
| self.offset_unset = fdt_util.GetBool(self._node, 'offset-unset') |
| self.extend_size = fdt_util.GetBool(self._node, 'extend-size') |
| self.missing_msg = fdt_util.GetString(self._node, 'missing-msg') |
| self.optional = fdt_util.GetBool(self._node, 'optional') |
| |
| # This is only supported by blobs and sections at present |
| self.compress = fdt_util.GetString(self._node, 'compress', 'none') |
| |
| def GetDefaultFilename(self): |
| return None |
| |
| def GetFdts(self): |
| """Get the device trees used by this entry |
| |
| Returns: |
| Empty dict, if this entry is not a .dtb, otherwise: |
| Dict: |
| key: Filename from this entry (without the path) |
| value: Tuple: |
| Entry object for this dtb |
| Filename of file containing this dtb |
| """ |
| return {} |
| |
| def gen_entries(self): |
| """Allow entries to generate other entries |
| |
| Some entries generate subnodes automatically, from which sub-entries |
| are then created. This method allows those to be added to the binman |
| definition for the current image. An entry which implements this method |
| should call state.AddSubnode() to add a subnode and can add properties |
| with state.AddString(), etc. |
| |
| An example is 'files', which produces a section containing a list of |
| files. |
| """ |
| pass |
| |
| def AddMissingProperties(self, have_image_pos): |
| """Add new properties to the device tree as needed for this entry |
| |
| Args: |
| have_image_pos: True if this entry has an image position. This can |
| be False if its parent section is compressed, since compression |
| groups all entries together into a compressed block of data, |
| obscuring the start of each individual child entry |
| """ |
| for prop in ['offset', 'size']: |
| if not prop in self._node.props: |
| state.AddZeroProp(self._node, prop) |
| if have_image_pos and 'image-pos' not in self._node.props: |
| state.AddZeroProp(self._node, 'image-pos') |
| if self.GetImage().allow_repack: |
| if self.orig_offset is not None: |
| state.AddZeroProp(self._node, 'orig-offset', True) |
| if self.orig_size is not None: |
| state.AddZeroProp(self._node, 'orig-size', True) |
| |
| if self.compress != 'none': |
| state.AddZeroProp(self._node, 'uncomp-size') |
| |
| if self.update_hash: |
| err = state.CheckAddHashProp(self._node) |
| if err: |
| self.Raise(err) |
| |
| def SetCalculatedProperties(self): |
| """Set the value of device-tree properties calculated by binman""" |
| state.SetInt(self._node, 'offset', self.offset) |
| state.SetInt(self._node, 'size', self.size) |
| base = self.section.GetRootSkipAtStart() if self.section else 0 |
| if self.image_pos is not None: |
| state.SetInt(self._node, 'image-pos', self.image_pos - base) |
| if self.GetImage().allow_repack: |
| if self.orig_offset is not None: |
| state.SetInt(self._node, 'orig-offset', self.orig_offset, True) |
| if self.orig_size is not None: |
| state.SetInt(self._node, 'orig-size', self.orig_size, True) |
| if self.uncomp_size is not None: |
| state.SetInt(self._node, 'uncomp-size', self.uncomp_size) |
| |
| if self.update_hash: |
| state.CheckSetHashValue(self._node, self.GetData) |
| |
| def ProcessFdt(self, fdt): |
| """Allow entries to adjust the device tree |
| |
| Some entries need to adjust the device tree for their purposes. This |
| may involve adding or deleting properties. |
| |
| Returns: |
| True if processing is complete |
| False if processing could not be completed due to a dependency. |
| This will cause the entry to be retried after others have been |
| called |
| """ |
| return True |
| |
| def SetPrefix(self, prefix): |
| """Set the name prefix for a node |
| |
| Args: |
| prefix: Prefix to set, or '' to not use a prefix |
| """ |
| if prefix: |
| self.name = prefix + self.name |
| |
| def SetContents(self, data): |
| """Set the contents of an entry |
| |
| This sets both the data and content_size properties |
| |
| Args: |
| data: Data to set to the contents (bytes) |
| """ |
| self.data = data |
| self.contents_size = len(self.data) |
| |
| def ProcessContentsUpdate(self, data): |
| """Update the contents of an entry, after the size is fixed |
| |
| This checks that the new data is the same size as the old. If the size |
| has changed, this triggers a re-run of the packing algorithm. |
| |
| Args: |
| data: Data to set to the contents (bytes) |
| |
| Raises: |
| ValueError if the new data size is not the same as the old |
| """ |
| size_ok = True |
| new_size = len(data) |
| if state.AllowEntryExpansion() and new_size > self.contents_size: |
| # self.data will indicate the new size needed |
| size_ok = False |
| elif state.AllowEntryContraction() and new_size < self.contents_size: |
| size_ok = False |
| |
| # If not allowed to change, try to deal with it or give up |
| if size_ok: |
| if new_size > self.contents_size: |
| self.Raise('Cannot update entry size from %d to %d' % |
| (self.contents_size, new_size)) |
| |
| # Don't let the data shrink. Pad it if necessary |
| if size_ok and new_size < self.contents_size: |
| data += tools.get_bytes(0, self.contents_size - new_size) |
| |
| if not size_ok: |
| tout.debug("Entry '%s' size change from %s to %s" % ( |
| self._node.path, to_hex(self.contents_size), |
| to_hex(new_size))) |
| self.SetContents(data) |
| return size_ok |
| |
| def ObtainContents(self, skip_entry=None, fake_size=0): |
| """Figure out the contents of an entry. |
| |
| Args: |
| skip_entry (Entry): Entry to skip when obtaining section contents |
| fake_size (int): Size of fake file to create if needed |
| |
| Returns: |
| True if the contents were found, False if another call is needed |
| after the other entries are processed. |
| """ |
| # No contents by default: subclasses can implement this |
| return True |
| |
| def ResetForPack(self): |
| """Reset offset/size fields so that packing can be done again""" |
| self.Detail('ResetForPack: offset %s->%s, size %s->%s' % |
| (to_hex(self.offset), to_hex(self.orig_offset), |
| to_hex(self.size), to_hex(self.orig_size))) |
| self.pre_reset_size = self.size |
| self.offset = self.orig_offset |
| self.size = self.orig_size |
| |
| def Pack(self, offset): |
| """Figure out how to pack the entry into the section |
| |
| Most of the time the entries are not fully specified. There may be |
| an alignment but no size. In that case we take the size from the |
| contents of the entry. |
| |
| If an entry has no hard-coded offset, it will be placed at @offset. |
| |
| Once this function is complete, both the offset and size of the |
| entry will be know. |
| |
| Args: |
| Current section offset pointer |
| |
| Returns: |
| New section offset pointer (after this entry) |
| """ |
| self.Detail('Packing: offset=%s, size=%s, content_size=%x' % |
| (to_hex(self.offset), to_hex(self.size), |
| self.contents_size)) |
| if self.offset is None: |
| if self.offset_unset: |
| self.Raise('No offset set with offset-unset: should another ' |
| 'entry provide this correct offset?') |
| self.offset = tools.align(offset, self.align) |
| needed = self.pad_before + self.contents_size + self.pad_after |
| needed = tools.align(needed, self.align_size) |
| size = self.size |
| if not size: |
| size = needed |
| new_offset = self.offset + size |
| aligned_offset = tools.align(new_offset, self.align_end) |
| if aligned_offset != new_offset: |
| size = aligned_offset - self.offset |
| new_offset = aligned_offset |
| |
| if not self.size: |
| self.size = size |
| |
| if self.size < needed: |
| self.Raise("Entry contents size is %#x (%d) but entry size is " |
| "%#x (%d)" % (needed, needed, self.size, self.size)) |
| # Check that the alignment is correct. It could be wrong if the |
| # and offset or size values were provided (i.e. not calculated), but |
| # conflict with the provided alignment values |
| if self.size != tools.align(self.size, self.align_size): |
| self.Raise("Size %#x (%d) does not match align-size %#x (%d)" % |
| (self.size, self.size, self.align_size, self.align_size)) |
| if self.offset != tools.align(self.offset, self.align): |
| self.Raise("Offset %#x (%d) does not match align %#x (%d)" % |
| (self.offset, self.offset, self.align, self.align)) |
| self.Detail(' - packed: offset=%#x, size=%#x, content_size=%#x, next_offset=%x' % |
| (self.offset, self.size, self.contents_size, new_offset)) |
| |
| return new_offset |
| |
| def Raise(self, msg): |
| """Convenience function to raise an error referencing a node""" |
| raise ValueError("Node '%s': %s" % (self._node.path, msg)) |
| |
| def Info(self, msg): |
| """Convenience function to log info referencing a node""" |
| tag = "Info '%s'" % self._node.path |
| tout.detail('%30s: %s' % (tag, msg)) |
| |
| def Detail(self, msg): |
| """Convenience function to log detail referencing a node""" |
| tag = "Node '%s'" % self._node.path |
| tout.detail('%30s: %s' % (tag, msg)) |
| |
| def GetEntryArgsOrProps(self, props, required=False): |
| """Return the values of a set of properties |
| |
| Args: |
| props: List of EntryArg objects |
| |
| Raises: |
| ValueError if a property is not found |
| """ |
| values = [] |
| missing = [] |
| for prop in props: |
| python_prop = prop.name.replace('-', '_') |
| if hasattr(self, python_prop): |
| value = getattr(self, python_prop) |
| else: |
| value = None |
| if value is None: |
| value = self.GetArg(prop.name, prop.datatype) |
| if value is None and required: |
| missing.append(prop.name) |
| values.append(value) |
| if missing: |
| self.GetImage().MissingArgs(self, missing) |
| return values |
| |
| def GetPath(self): |
| """Get the path of a node |
| |
| Returns: |
| Full path of the node for this entry |
| """ |
| return self._node.path |
| |
| def GetData(self, required=True): |
| """Get the contents of an entry |
| |
| Args: |
| required: True if the data must be present, False if it is OK to |
| return None |
| |
| Returns: |
| bytes content of the entry, excluding any padding. If the entry is |
| compressed, the compressed data is returned. If the entry data |
| is not yet available, False can be returned |
| """ |
| self.Detail('GetData: size %s' % to_hex_size(self.data)) |
| return self.data |
| |
| def GetPaddedData(self, data=None): |
| """Get the data for an entry including any padding |
| |
| Gets the entry data and uses its section's pad-byte value to add padding |
| before and after as defined by the pad-before and pad-after properties. |
| |
| This does not consider alignment. |
| |
| Returns: |
| Contents of the entry along with any pad bytes before and |
| after it (bytes) |
| """ |
| if data is None: |
| data = self.GetData() |
| return self.section.GetPaddedDataForEntry(self, data) |
| |
| def GetOffsets(self): |
| """Get the offsets for siblings |
| |
| Some entry types can contain information about the position or size of |
| other entries. An example of this is the Intel Flash Descriptor, which |
| knows where the Intel Management Engine section should go. |
| |
| If this entry knows about the position of other entries, it can specify |
| this by returning values here |
| |
| Returns: |
| Dict: |
| key: Entry type |
| value: List containing position and size of the given entry |
| type. Either can be None if not known |
| """ |
| return {} |
| |
| def SetOffsetSize(self, offset, size): |
| """Set the offset and/or size of an entry |
| |
| Args: |
| offset: New offset, or None to leave alone |
| size: New size, or None to leave alone |
| """ |
| if offset is not None: |
| self.offset = offset |
| if size is not None: |
| self.size = size |
| |
| def SetImagePos(self, image_pos): |
| """Set the position in the image |
| |
| Args: |
| image_pos: Position of this entry in the image |
| """ |
| self.image_pos = image_pos + self.offset |
| |
| def ProcessContents(self): |
| """Do any post-packing updates of entry contents |
| |
| This function should call ProcessContentsUpdate() to update the entry |
| contents, if necessary, returning its return value here. |
| |
| Args: |
| data: Data to set to the contents (bytes) |
| |
| Returns: |
| True if the new data size is OK, False if expansion is needed |
| |
| Raises: |
| ValueError if the new data size is not the same as the old and |
| state.AllowEntryExpansion() is False |
| """ |
| return True |
| |
| def WriteSymbols(self, section): |
| """Write symbol values into binary files for access at run time |
| |
| Args: |
| section: Section containing the entry |
| """ |
| if self.auto_write_symbols: |
| # Check if we are writing symbols into an ELF file |
| is_elf = self.GetDefaultFilename() == self.elf_fname |
| elf.LookupAndWriteSymbols(self.elf_fname, self, section.GetImage(), |
| is_elf) |
| |
| def CheckEntries(self): |
| """Check that the entry offsets are correct |
| |
| This is used for entries which have extra offset requirements (other |
| than having to be fully inside their section). Sub-classes can implement |
| this function and raise if there is a problem. |
| """ |
| pass |
| |
| @staticmethod |
| def GetStr(value): |
| if value is None: |
| return '<none> ' |
| return '%08x' % value |
| |
| @staticmethod |
| def WriteMapLine(fd, indent, name, offset, size, image_pos): |
| print('%s %s%s %s %s' % (Entry.GetStr(image_pos), ' ' * indent, |
| Entry.GetStr(offset), Entry.GetStr(size), |
| name), file=fd) |
| |
| def WriteMap(self, fd, indent): |
| """Write a map of the entry to a .map file |
| |
| Args: |
| fd: File to write the map to |
| indent: Curent indent level of map (0=none, 1=one level, etc.) |
| """ |
| self.WriteMapLine(fd, indent, self.name, self.offset, self.size, |
| self.image_pos) |
| |
| # pylint: disable=assignment-from-none |
| def GetEntries(self): |
| """Return a list of entries contained by this entry |
| |
| Returns: |
| List of entries, or None if none. A normal entry has no entries |
| within it so will return None |
| """ |
| return None |
| |
| def FindEntryByNode(self, find_node): |
| """Find a node in an entry, searching all subentries |
| |
| This does a recursive search. |
| |
| Args: |
| find_node (fdt.Node): Node to find |
| |
| Returns: |
| Entry: entry, if found, else None |
| """ |
| entries = self.GetEntries() |
| if entries: |
| for entry in entries.values(): |
| if entry._node == find_node: |
| return entry |
| found = entry.FindEntryByNode(find_node) |
| if found: |
| return found |
| |
| return None |
| |
| def GetArg(self, name, datatype=str): |
| """Get the value of an entry argument or device-tree-node property |
| |
| Some node properties can be provided as arguments to binman. First check |
| the entry arguments, and fall back to the device tree if not found |
| |
| Args: |
| name: Argument name |
| datatype: Data type (str or int) |
| |
| Returns: |
| Value of argument as a string or int, or None if no value |
| |
| Raises: |
| ValueError if the argument cannot be converted to in |
| """ |
| value = state.GetEntryArg(name) |
| if value is not None: |
| if datatype == int: |
| try: |
| value = int(value) |
| except ValueError: |
| self.Raise("Cannot convert entry arg '%s' (value '%s') to integer" % |
| (name, value)) |
| elif datatype == str: |
| pass |
| else: |
| raise ValueError("GetArg() internal error: Unknown data type '%s'" % |
| datatype) |
| else: |
| value = fdt_util.GetDatatype(self._node, name, datatype) |
| return value |
| |
| @staticmethod |
| def WriteDocs(modules, test_missing=None): |
| """Write out documentation about the various entry types to stdout |
| |
| Args: |
| modules: List of modules to include |
| test_missing: Used for testing. This is a module to report |
| as missing |
| """ |
| print('''Binman Entry Documentation |
| =========================== |
| |
| This file describes the entry types supported by binman. These entry types can |
| be placed in an image one by one to build up a final firmware image. It is |
| fairly easy to create new entry types. Just add a new file to the 'etype' |
| directory. You can use the existing entries as examples. |
| |
| Note that some entries are subclasses of others, using and extending their |
| features to produce new behaviours. |
| |
| |
| ''') |
| modules = sorted(modules) |
| |
| # Don't show the test entry |
| if '_testing' in modules: |
| modules.remove('_testing') |
| missing = [] |
| for name in modules: |
| module = Entry.Lookup('WriteDocs', name, False) |
| docs = getattr(module, '__doc__') |
| if test_missing == name: |
| docs = None |
| if docs: |
| lines = docs.splitlines() |
| first_line = lines[0] |
| rest = [line[4:] for line in lines[1:]] |
| hdr = 'Entry: %s: %s' % (name.replace('_', '-'), first_line) |
| |
| # Create a reference for use by rST docs |
| ref_name = f'etype_{module.__name__[6:]}'.lower() |
| print('.. _%s:' % ref_name) |
| print() |
| print(hdr) |
| print('-' * len(hdr)) |
| print('\n'.join(rest)) |
| print() |
| print() |
| else: |
| missing.append(name) |
| |
| if missing: |
| raise ValueError('Documentation is missing for modules: %s' % |
| ', '.join(missing)) |
| |
| def GetUniqueName(self): |
| """Get a unique name for a node |
| |
| Returns: |
| String containing a unique name for a node, consisting of the name |
| of all ancestors (starting from within the 'binman' node) separated |
| by a dot ('.'). This can be useful for generating unique filesnames |
| in the output directory. |
| """ |
| name = self.name |
| node = self._node |
| while node.parent: |
| node = node.parent |
| if node.name in ('binman', '/'): |
| break |
| name = '%s.%s' % (node.name, name) |
| return name |
| |
| def extend_to_limit(self, limit): |
| """Extend an entry so that it ends at the given offset limit""" |
| if self.offset + self.size < limit: |
| self.size = limit - self.offset |
| # Request the contents again, since changing the size requires that |
| # the data grows. This should not fail, but check it to be sure. |
| if not self.ObtainContents(): |
| self.Raise('Cannot obtain contents when expanding entry') |
| |
| def HasSibling(self, name): |
| """Check if there is a sibling of a given name |
| |
| Returns: |
| True if there is an entry with this name in the the same section, |
| else False |
| """ |
| return name in self.section.GetEntries() |
| |
| def GetSiblingImagePos(self, name): |
| """Return the image position of the given sibling |
| |
| Returns: |
| Image position of sibling, or None if the sibling has no position, |
| or False if there is no such sibling |
| """ |
| if not self.HasSibling(name): |
| return False |
| return self.section.GetEntries()[name].image_pos |
| |
| @staticmethod |
| def AddEntryInfo(entries, indent, name, etype, size, image_pos, |
| uncomp_size, offset, entry): |
| """Add a new entry to the entries list |
| |
| Args: |
| entries: List (of EntryInfo objects) to add to |
| indent: Current indent level to add to list |
| name: Entry name (string) |
| etype: Entry type (string) |
| size: Entry size in bytes (int) |
| image_pos: Position within image in bytes (int) |
| uncomp_size: Uncompressed size if the entry uses compression, else |
| None |
| offset: Entry offset within parent in bytes (int) |
| entry: Entry object |
| """ |
| entries.append(EntryInfo(indent, name, etype, size, image_pos, |
| uncomp_size, offset, entry)) |
| |
| def ListEntries(self, entries, indent): |
| """Add files in this entry to the list of entries |
| |
| This can be overridden by subclasses which need different behaviour. |
| |
| Args: |
| entries: List (of EntryInfo objects) to add to |
| indent: Current indent level to add to list |
| """ |
| self.AddEntryInfo(entries, indent, self.name, self.etype, self.size, |
| self.image_pos, self.uncomp_size, self.offset, self) |
| |
| def ReadData(self, decomp=True, alt_format=None): |
| """Read the data for an entry from the image |
| |
| This is used when the image has been read in and we want to extract the |
| data for a particular entry from that image. |
| |
| Args: |
| decomp: True to decompress any compressed data before returning it; |
| False to return the raw, uncompressed data |
| |
| Returns: |
| Entry data (bytes) |
| """ |
| # Use True here so that we get an uncompressed section to work from, |
| # although compressed sections are currently not supported |
| tout.debug("ReadChildData section '%s', entry '%s'" % |
| (self.section.GetPath(), self.GetPath())) |
| data = self.section.ReadChildData(self, decomp, alt_format) |
| return data |
| |
| def ReadChildData(self, child, decomp=True, alt_format=None): |
| """Read the data for a particular child entry |
| |
| This reads data from the parent and extracts the piece that relates to |
| the given child. |
| |
| Args: |
| child (Entry): Child entry to read data for (must be valid) |
| decomp (bool): True to decompress any compressed data before |
| returning it; False to return the raw, uncompressed data |
| alt_format (str): Alternative format to read in, or None |
| |
| Returns: |
| Data for the child (bytes) |
| """ |
| pass |
| |
| def LoadData(self, decomp=True): |
| data = self.ReadData(decomp) |
| self.contents_size = len(data) |
| self.ProcessContentsUpdate(data) |
| self.Detail('Loaded data size %x' % len(data)) |
| |
| def GetAltFormat(self, data, alt_format): |
| """Read the data for an extry in an alternative format |
| |
| Supported formats are list in the documentation for each entry. An |
| example is fdtmap which provides . |
| |
| Args: |
| data (bytes): Data to convert (this should have been produced by the |
| entry) |
| alt_format (str): Format to use |
| |
| """ |
| pass |
| |
| def GetImage(self): |
| """Get the image containing this entry |
| |
| Returns: |
| Image object containing this entry |
| """ |
| return self.section.GetImage() |
| |
| def WriteData(self, data, decomp=True): |
| """Write the data to an entry in the image |
| |
| This is used when the image has been read in and we want to replace the |
| data for a particular entry in that image. |
| |
| The image must be re-packed and written out afterwards. |
| |
| Args: |
| data: Data to replace it with |
| decomp: True to compress the data if needed, False if data is |
| already compressed so should be used as is |
| |
| Returns: |
| True if the data did not result in a resize of this entry, False if |
| the entry must be resized |
| """ |
| if self.size is not None: |
| self.contents_size = self.size |
| else: |
| self.contents_size = self.pre_reset_size |
| ok = self.ProcessContentsUpdate(data) |
| self.Detail('WriteData: size=%x, ok=%s' % (len(data), ok)) |
| section_ok = self.section.WriteChildData(self) |
| return ok and section_ok |
| |
| def WriteChildData(self, child): |
| """Handle writing the data in a child entry |
| |
| This should be called on the child's parent section after the child's |
| data has been updated. It should update any data structures needed to |
| validate that the update is successful. |
| |
| This base-class implementation does nothing, since the base Entry object |
| does not have any children. |
| |
| Args: |
| child: Child Entry that was written |
| |
| Returns: |
| True if the section could be updated successfully, False if the |
| data is such that the section could not update |
| """ |
| return True |
| |
| def GetSiblingOrder(self): |
| """Get the relative order of an entry amoung its siblings |
| |
| Returns: |
| 'start' if this entry is first among siblings, 'end' if last, |
| otherwise None |
| """ |
| entries = list(self.section.GetEntries().values()) |
| if entries: |
| if self == entries[0]: |
| return 'start' |
| elif self == entries[-1]: |
| return 'end' |
| return 'middle' |
| |
| def SetAllowMissing(self, allow_missing): |
| """Set whether a section allows missing external blobs |
| |
| Args: |
| allow_missing: True if allowed, False if not allowed |
| """ |
| # This is meaningless for anything other than sections |
| pass |
| |
| def SetAllowFakeBlob(self, allow_fake): |
| """Set whether a section allows to create a fake blob |
| |
| Args: |
| allow_fake: True if allowed, False if not allowed |
| """ |
| self.allow_fake = allow_fake |
| |
| def CheckMissing(self, missing_list): |
| """Check if the entry has missing external blobs |
| |
| If there are missing (non-optional) blobs, the entries are added to the |
| list |
| |
| Args: |
| missing_list: List of Entry objects to be added to |
| """ |
| if self.missing and not self.optional: |
| missing_list.append(self) |
| |
| def check_fake_fname(self, fname, size=0): |
| """If the file is missing and the entry allows fake blobs, fake it |
| |
| Sets self.faked to True if faked |
| |
| Args: |
| fname (str): Filename to check |
| size (int): Size of fake file to create |
| |
| Returns: |
| tuple: |
| fname (str): Filename of faked file |
| bool: True if the blob was faked, False if not |
| """ |
| if self.allow_fake and not pathlib.Path(fname).is_file(): |
| if not self.fake_fname: |
| outfname = os.path.join(self.fake_dir, os.path.basename(fname)) |
| with open(outfname, "wb") as out: |
| out.truncate(size) |
| tout.info(f"Entry '{self._node.path}': Faked blob '{outfname}'") |
| self.fake_fname = outfname |
| self.faked = True |
| return self.fake_fname, True |
| return fname, False |
| |
| def CheckFakedBlobs(self, faked_blobs_list): |
| """Check if any entries in this section have faked external blobs |
| |
| If there are faked blobs, the entries are added to the list |
| |
| Args: |
| fake_blobs_list: List of Entry objects to be added to |
| """ |
| # This is meaningless for anything other than blobs |
| pass |
| |
| def CheckOptional(self, optional_list): |
| """Check if the entry has missing but optional external blobs |
| |
| If there are missing (optional) blobs, the entries are added to the list |
| |
| Args: |
| optional_list (list): List of Entry objects to be added to |
| """ |
| if self.missing and self.optional: |
| optional_list.append(self) |
| |
| def GetAllowMissing(self): |
| """Get whether a section allows missing external blobs |
| |
| Returns: |
| True if allowed, False if not allowed |
| """ |
| return self.allow_missing |
| |
| def record_missing_bintool(self, bintool): |
| """Record a missing bintool that was needed to produce this entry |
| |
| Args: |
| bintool (Bintool): Bintool that was missing |
| """ |
| if bintool not in self.missing_bintools: |
| self.missing_bintools.append(bintool) |
| |
| def check_missing_bintools(self, missing_list): |
| """Check if any entries in this section have missing bintools |
| |
| If there are missing bintools, these are added to the list |
| |
| Args: |
| missing_list: List of Bintool objects to be added to |
| """ |
| for bintool in self.missing_bintools: |
| if bintool not in missing_list: |
| missing_list.append(bintool) |
| |
| |
| def GetHelpTags(self): |
| """Get the tags use for missing-blob help |
| |
| Returns: |
| list of possible tags, most desirable first |
| """ |
| return list(filter(None, [self.missing_msg, self.name, self.etype])) |
| |
| def CompressData(self, indata): |
| """Compress data according to the entry's compression method |
| |
| Args: |
| indata: Data to compress |
| |
| Returns: |
| Compressed data |
| """ |
| self.uncomp_data = indata |
| if self.compress != 'none': |
| self.uncomp_size = len(indata) |
| if self.comp_bintool.is_present(): |
| data = self.comp_bintool.compress(indata) |
| else: |
| self.record_missing_bintool(self.comp_bintool) |
| data = tools.get_bytes(0, 1024) |
| else: |
| data = indata |
| return data |
| |
| def DecompressData(self, indata): |
| """Decompress data according to the entry's compression method |
| |
| Args: |
| indata: Data to decompress |
| |
| Returns: |
| Decompressed data |
| """ |
| if self.compress != 'none': |
| if self.comp_bintool.is_present(): |
| data = self.comp_bintool.decompress(indata) |
| self.uncomp_size = len(data) |
| else: |
| self.record_missing_bintool(self.comp_bintool) |
| data = tools.get_bytes(0, 1024) |
| else: |
| data = indata |
| self.uncomp_data = data |
| return data |
| |
| @classmethod |
| def UseExpanded(cls, node, etype, new_etype): |
| """Check whether to use an expanded entry type |
| |
| This is called by Entry.Create() when it finds an expanded version of |
| an entry type (e.g. 'u-boot-expanded'). If this method returns True then |
| it will be used (e.g. in place of 'u-boot'). If it returns False, it is |
| ignored. |
| |
| Args: |
| node: Node object containing information about the entry to |
| create |
| etype: Original entry type being used |
| new_etype: New entry type proposed |
| |
| Returns: |
| True to use this entry type, False to use the original one |
| """ |
| tout.info("Node '%s': etype '%s': %s selected" % |
| (node.path, etype, new_etype)) |
| return True |
| |
| def CheckAltFormats(self, alt_formats): |
| """Add any alternative formats supported by this entry type |
| |
| Args: |
| alt_formats (dict): Dict to add alt_formats to: |
| key: Name of alt format |
| value: Help text |
| """ |
| pass |
| |
| def AddBintools(self, btools): |
| """Add the bintools used by this entry type |
| |
| Args: |
| btools (dict of Bintool): |
| |
| Raise: |
| ValueError if compression algorithm is not supported |
| """ |
| algo = self.compress |
| if algo != 'none': |
| algos = ['bzip2', 'gzip', 'lz4', 'lzma', 'lzo', 'xz', 'zstd'] |
| if algo not in algos: |
| raise ValueError("Unknown algorithm '%s'" % algo) |
| names = {'lzma': 'lzma_alone', 'lzo': 'lzop'} |
| name = names.get(self.compress, self.compress) |
| self.comp_bintool = self.AddBintool(btools, name) |
| |
| @classmethod |
| def AddBintool(self, tools, name): |
| """Add a new bintool to the tools used by this etype |
| |
| Args: |
| name: Name of the tool |
| """ |
| btool = bintool.Bintool.create(name) |
| tools[name] = btool |
| return btool |
| |
| def SetUpdateHash(self, update_hash): |
| """Set whether this entry's "hash" subnode should be updated |
| |
| Args: |
| update_hash: True if hash should be updated, False if not |
| """ |
| self.update_hash = update_hash |
| |
| def collect_contents_to_file(self, entries, prefix, fake_size=0): |
| """Put the contents of a list of entries into a file |
| |
| Args: |
| entries (list of Entry): Entries to collect |
| prefix (str): Filename prefix of file to write to |
| fake_size (int): Size of fake file to create if needed |
| |
| If any entry does not have contents yet, this function returns False |
| for the data. |
| |
| Returns: |
| Tuple: |
| bytes: Concatenated data from all the entries (or None) |
| str: Filename of file written (or None if no data) |
| str: Unique portion of filename (or None if no data) |
| """ |
| data = b'' |
| for entry in entries: |
| # First get the input data and put it in a file. If not available, |
| # try later. |
| if not entry.ObtainContents(fake_size=fake_size): |
| return None, None, None |
| data += entry.GetData() |
| uniq = self.GetUniqueName() |
| fname = tools.get_output_filename(f'{prefix}.{uniq}') |
| tools.write_file(fname, data) |
| return data, fname, uniq |
| |
| @classmethod |
| def create_fake_dir(cls): |
| """Create the directory for fake files""" |
| cls.fake_dir = tools.get_output_filename('binman-fake') |
| if not os.path.exists(cls.fake_dir): |
| os.mkdir(cls.fake_dir) |
| tout.notice(f"Fake-blob dir is '{cls.fake_dir}'") |
| |
| def ensure_props(self): |
| """Raise an exception if properties are missing |
| |
| Args: |
| prop_list (list of str): List of properties to check for |
| |
| Raises: |
| ValueError: Any property is missing |
| """ |
| not_present = [] |
| for prop in self.required_props: |
| if not prop in self._node.props: |
| not_present.append(prop) |
| if not_present: |
| self.Raise(f"'{self.etype}' entry is missing properties: {' '.join(not_present)}") |
| |
| def mark_absent(self, msg): |
| tout.info("Entry '%s' marked absent: %s" % (self._node.path, msg)) |
| self.absent = True |
| |
| def read_elf_segments(self): |
| """Read segments from an entry that can generate an ELF file |
| |
| Returns: |
| tuple: |
| list of segments, each: |
| int: Segment number (0 = first) |
| int: Start address of segment in memory |
| bytes: Contents of segment |
| int: entry address of ELF file |
| """ |
| return None |