We want to support multiple sections within a single image. To do this, move most of the Image class implementation into a new Section class. An Image contains only a single Section, but at some point we will support a new 'section' entry, thus allowing Sections within Sections.
Use the name 'bsection' for the module so we can use 'section' for the etype module.
Signed-off-by: Simon Glass sjg@chromium.org ---
tools/binman/bsection.py | 302 +++++++++++++++++++++++++++++++++++++ tools/binman/ftest.py | 16 +- tools/binman/image.py | 247 +++--------------------------- tools/binman/image_test.py | 18 ++- 4 files changed, 340 insertions(+), 243 deletions(-) create mode 100644 tools/binman/bsection.py
diff --git a/tools/binman/bsection.py b/tools/binman/bsection.py new file mode 100644 index 00000000000..70da2c9ef50 --- /dev/null +++ b/tools/binman/bsection.py @@ -0,0 +1,302 @@ +# Copyright (c) 2018 Google, Inc +# +# SPDX-License-Identifier: GPL-2.0+ +# +# Base class for sections (collections of entries) +# + +from __future__ import print_function + +from collections import OrderedDict +import sys + +import fdt_util +import re +import tools + +class Section(object): + """A section which contains multiple entries + + A section represents a collection of entries. There must be one or more + sections in an image. Sections are used to group entries together. + + Attributes: + _node: Node object that contains the section definition in device tree + _size: Section size in bytes, or None if not known yet + _align_size: Section size alignment, or None + _pad_before: Number of bytes before the first entry starts. This + effectively changes the place where entry position 0 starts + _pad_after: Number of bytes after the last entry ends. The last + entry will finish on or before this boundary + _pad_byte: Byte to use to pad the section where there is no entry + _sort: True if entries should be sorted by position, False if they + must be in-order in the device tree description + _skip_at_start: Number of bytes before the first entry starts. These + effectively adjust the starting position of entries. For example, + if _pad_before is 16, then the first entry would start at 16. + An entry with pos = 20 would in fact be written at position 4 + in the image file. + _end_4gb: Indicates that the section ends at the 4GB boundary. This is + used for x86 images, which want to use positions such that a + memory address (like 0xff800000) is the first entry position. + This causes _skip_at_start to be set to the starting memory + address. + _entries: OrderedDict() of entries + """ + def __init__(self, name, node, test=False): + global entry + global Entry + import entry + from entry import Entry + + self._node = node + self._size = None + self._align_size = None + self._pad_before = 0 + self._pad_after = 0 + self._pad_byte = 0 + self._sort = False + self._skip_at_start = 0 + self._end_4gb = False + self._entries = OrderedDict() + if not test: + self._ReadNode() + self._ReadEntries() + + def _ReadNode(self): + """Read properties from the section node""" + self._size = fdt_util.GetInt(self._node, 'size') + self._align_size = fdt_util.GetInt(self._node, 'align-size') + if tools.NotPowerOfTwo(self._align_size): + self._Raise("Alignment size %s must be a power of two" % + self._align_size) + self._pad_before = fdt_util.GetInt(self._node, 'pad-before', 0) + self._pad_after = fdt_util.GetInt(self._node, 'pad-after', 0) + self._pad_byte = fdt_util.GetInt(self._node, 'pad-byte', 0) + self._sort = fdt_util.GetBool(self._node, 'sort-by-pos') + self._end_4gb = fdt_util.GetBool(self._node, 'end-at-4gb') + if self._end_4gb and not self._size: + self._Raise("Section size must be provided when using end-at-4gb") + if self._end_4gb: + self._skip_at_start = 0x100000000 - self._size + + def _ReadEntries(self): + for node in self._node.subnodes: + self._entries[node.name] = Entry.Create(self, node) + + def CheckSize(self): + """Check that the section contents does not exceed its size, etc.""" + contents_size = 0 + for entry in self._entries.values(): + contents_size = max(contents_size, entry.pos + entry.size) + + contents_size -= self._skip_at_start + + size = self._size + if not size: + size = self._pad_before + contents_size + self._pad_after + size = tools.Align(size, self._align_size) + + if self._size and contents_size > self._size: + self._Raise("contents size %#x (%d) exceeds section size %#x (%d)" % + (contents_size, contents_size, self._size, self._size)) + if not self._size: + self._size = size + 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)) + return size + + def _Raise(self, msg): + """Raises an error for this section + + Args: + msg: Error message to use in the raise string + Raises: + ValueError() + """ + raise ValueError("Section '%s': %s" % (self._node.path, msg)) + + def GetPath(self): + """Get the path of an image (in the FDT) + + Returns: + Full path of the node for this image + """ + return self._node.path + + def FindEntryType(self, etype): + """Find an entry type in the section + + Args: + etype: Entry type to find + Returns: + entry matching that type, or None if not found + """ + for entry in self._entries.values(): + if entry.etype == etype: + return entry + return None + + def GetEntryContents(self): + """Call ObtainContents() for each entry + + This calls each entry's ObtainContents() a few times until they all + return True. We stop calling an entry's function once it returns + True. This allows the contents of one entry to depend on another. + + After 3 rounds we give up since it's likely an error. + """ + todo = self._entries.values() + for passnum in range(3): + next_todo = [] + for entry in todo: + if not entry.ObtainContents(): + next_todo.append(entry) + todo = next_todo + if not todo: + break + + def _SetEntryPosSize(self, name, pos, size): + """Set the position and size of an entry + + Args: + name: Entry name to update + pos: New position + size: New size + """ + entry = self._entries.get(name) + if not entry: + self._Raise("Unable to set pos/size for unknown entry '%s'" % name) + entry.SetPositionSize(self._skip_at_start + pos, size) + + def GetEntryPositions(self): + """Handle entries that want to set the position/size of other entries + + This calls each entry's GetPositions() method. If it returns a list + of entries to update, it updates them. + """ + for entry in self._entries.values(): + pos_dict = entry.GetPositions() + for name, info in pos_dict.iteritems(): + self._SetEntryPosSize(name, *info) + + def PackEntries(self): + """Pack all entries into the section""" + pos = self._skip_at_start + for entry in self._entries.values(): + pos = entry.Pack(pos) + + def _SortEntries(self): + """Sort entries by position""" + entries = sorted(self._entries.values(), key=lambda entry: entry.pos) + self._entries.clear() + for entry in entries: + self._entries[entry._node.name] = entry + + def CheckEntries(self): + """Check that entries do not overlap or extend outside the section""" + if self._sort: + self._SortEntries() + pos = 0 + prev_name = 'None' + for entry in self._entries.values(): + if (entry.pos < self._skip_at_start or + entry.pos >= self._skip_at_start + self._size): + entry.Raise("Position %#x (%d) is outside the section starting " + "at %#x (%d)" % + (entry.pos, entry.pos, self._skip_at_start, + self._skip_at_start)) + if entry.pos < pos: + entry.Raise("Position %#x (%d) overlaps with previous entry '%s' " + "ending at %#x (%d)" % + (entry.pos, entry.pos, prev_name, pos, pos)) + pos = entry.pos + entry.size + prev_name = entry.GetPath() + + def ProcessEntryContents(self): + """Call the ProcessContents() method for each entry + + This is intended to adjust the contents as needed by the entry type. + """ + for entry in self._entries.values(): + entry.ProcessContents() + + def WriteSymbols(self): + """Write symbol values into binary files for access at run time""" + for entry in self._entries.values(): + entry.WriteSymbols(self) + + def BuildSection(self, fd, base_pos): + """Write the section to a file""" + fd.seek(base_pos) + fd.write(self.GetData()) + + def GetData(self): + """Write the section to a file""" + section_data = chr(self._pad_byte) * self._size + + for entry in self._entries.values(): + data = entry.GetData() + base = self._pad_before + entry.pos - self._skip_at_start + section_data = (section_data[:base] + data + + section_data[base + len(data):]) + return section_data + + def LookupSymbol(self, sym_name, optional, msg): + """Look up a symbol in an ELF file + + Looks up a symbol in an ELF file. Only entry types which come from an + ELF image can be used by this function. + + At present the only entry property supported is pos. + + Args: + sym_name: Symbol name in the ELF file to look up in the format + _binman_<entry>_prop_<property> where <entry> is the name of + the entry and <property> is the property to find (e.g. + _binman_u_boot_prop_pos). As a special case, you can append + _any to <entry> to have it search for any matching entry. E.g. + _binman_u_boot_any_prop_pos will match entries called u-boot, + u-boot-img and u-boot-nodtb) + optional: True if the symbol is optional. If False this function + will raise if the symbol is not found + msg: Message to display if an error occurs + + Returns: + Value that should be assigned to that symbol, or None if it was + optional and not found + + Raises: + ValueError if the symbol is invalid or not found, or references a + property which is not supported + """ + m = re.match(r'^_binman_(\w+)_prop_(\w+)$', sym_name) + if not m: + raise ValueError("%s: Symbol '%s' has invalid format" % + (msg, sym_name)) + entry_name, prop_name = m.groups() + entry_name = entry_name.replace('_', '-') + entry = self._entries.get(entry_name) + if not entry: + if entry_name.endswith('-any'): + root = entry_name[:-4] + for name in self._entries: + if name.startswith(root): + rest = name[len(root):] + if rest in ['', '-img', '-nodtb']: + entry = self._entries[name] + if not entry: + err = ("%s: Entry '%s' not found in list (%s)" % + (msg, entry_name, ','.join(self._entries.keys()))) + if optional: + print('Warning: %s' % err, file=sys.stderr) + return None + raise ValueError(err) + if prop_name == 'pos': + return entry.pos + else: + raise ValueError("%s: No such property '%s'" % (msg, prop_name)) + + def GetEntries(self): + return self._entries diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py index b5e8736fbb5..4a95a9c430a 100644 --- a/tools/binman/ftest.py +++ b/tools/binman/ftest.py @@ -413,7 +413,7 @@ class TestFunctional(unittest.TestCase): self.assertEqual(0, retcode) self.assertIn('image', control.images) image = control.images['image'] - entries = image._entries + entries = image.GetEntries() self.assertEqual(5, len(entries))
# First u-boot @@ -456,7 +456,7 @@ class TestFunctional(unittest.TestCase): self.assertEqual(0, retcode) self.assertIn('image', control.images) image = control.images['image'] - entries = image._entries + entries = image.GetEntries() self.assertEqual(5, len(entries))
# First u-boot with padding before and after @@ -540,7 +540,7 @@ class TestFunctional(unittest.TestCase): """Test that entries which overflow the image size are detected""" with self.assertRaises(ValueError) as e: self._DoTestFile('16_pack_image_overflow.dts') - self.assertIn("Image '/binman': contents size 0x4 (4) exceeds image " + self.assertIn("Section '/binman': contents size 0x4 (4) exceeds section " "size 0x3 (3)", str(e.exception))
def testPackImageSize(self): @@ -563,14 +563,14 @@ class TestFunctional(unittest.TestCase): """Test that invalid image alignment is detected""" with self.assertRaises(ValueError) as e: self._DoTestFile('19_pack_inv_image_align.dts') - self.assertIn("Image '/binman': Size 0x7 (7) does not match " + self.assertIn("Section '/binman': Size 0x7 (7) does not match " "align-size 0x8 (8)", str(e.exception))
def testPackAlignPowerOf2(self): """Test that invalid image alignment is detected""" with self.assertRaises(ValueError) as e: self._DoTestFile('20_pack_inv_image_align_power2.dts') - self.assertIn("Image '/binman': Alignment size 131 must be a power of " + self.assertIn("Section '/binman': Alignment size 131 must be a power of " "two", str(e.exception))
def testImagePadByte(self): @@ -620,7 +620,7 @@ class TestFunctional(unittest.TestCase): """Test that the end-at-4gb property requires a size property""" with self.assertRaises(ValueError) as e: self._DoTestFile('27_pack_4gb_no_size.dts') - self.assertIn("Image '/binman': Image size must be provided when " + self.assertIn("Section '/binman': Section size must be provided when " "using end-at-4gb", str(e.exception))
def testPackX86RomOutside(self): @@ -628,7 +628,7 @@ class TestFunctional(unittest.TestCase): with self.assertRaises(ValueError) as e: self._DoTestFile('28_pack_4gb_outside.dts') self.assertIn("Node '/binman/u-boot': Position 0x0 (0) is outside " - "the image starting at 0xffffffe0 (4294967264)", + "the section starting at 0xffffffe0 (4294967264)", str(e.exception))
def testPackX86Rom(self): @@ -823,7 +823,7 @@ class TestFunctional(unittest.TestCase): """Test that microcode must be placed within the image""" with self.assertRaises(ValueError) as e: self._DoReadFile('41_unknown_pos_size.dts', True) - self.assertIn("Image '/binman': Unable to set pos/size for unknown " + self.assertIn("Section '/binman': Unable to set pos/size for unknown " "entry 'invalid-entry'", str(e.exception))
def testPackFsp(self): diff --git a/tools/binman/image.py b/tools/binman/image.py index b10b1887957..1d234965fa3 100644 --- a/tools/binman/image.py +++ b/tools/binman/image.py @@ -13,6 +13,7 @@ import re import sys
import fdt_util +import bsection import tools
class Image: @@ -27,158 +28,31 @@ class Image: _node: Node object that contains the image definition in device tree _name: Image name _size: Image size in bytes, or None if not known yet - _align_size: Image size alignment, or None - _pad_before: Number of bytes before the first entry starts. This - effectively changes the place where entry position 0 starts - _pad_after: Number of bytes after the last entry ends. The last - entry will finish on or before this boundary - _pad_byte: Byte to use to pad the image where there is no entry _filename: Output filename for image - _sort: True if entries should be sorted by position, False if they - must be in-order in the device tree description - _skip_at_start: Number of bytes before the first entry starts. These - effecively adjust the starting position of entries. For example, - if _pad_before is 16, then the first entry would start at 16. - An entry with pos = 20 would in fact be written at position 4 - in the image file. - _end_4gb: Indicates that the image ends at the 4GB boundary. This is - used for x86 images, which want to use positions such that a - memory address (like 0xff800000) is the first entry position. - This causes _skip_at_start to be set to the starting memory - address. - _entries: OrderedDict() of entries + _sections: Sections present in this image (may be one or more) """ def __init__(self, name, node, test=False): - global entry - global Entry - import entry - from entry import Entry - self._node = node self._name = name self._size = None - self._align_size = None - self._pad_before = 0 - self._pad_after = 0 - self._pad_byte = 0 self._filename = '%s.bin' % self._name - self._sort = False - self._skip_at_start = 0 - self._end_4gb = False - self._entries = OrderedDict() - - if not test: + if test: + self._section = bsection.Section('main-section', self._node, True) + else: self._ReadNode() - self._ReadEntries()
def _ReadNode(self): """Read properties from the image node""" self._size = fdt_util.GetInt(self._node, 'size') - self._align_size = fdt_util.GetInt(self._node, 'align-size') - if tools.NotPowerOfTwo(self._align_size): - self._Raise("Alignment size %s must be a power of two" % - self._align_size) - self._pad_before = fdt_util.GetInt(self._node, 'pad-before', 0) - self._pad_after = fdt_util.GetInt(self._node, 'pad-after', 0) - self._pad_byte = fdt_util.GetInt(self._node, 'pad-byte', 0) filename = fdt_util.GetString(self._node, 'filename') if filename: self._filename = filename - self._sort = fdt_util.GetBool(self._node, 'sort-by-pos') - self._end_4gb = fdt_util.GetBool(self._node, 'end-at-4gb') - if self._end_4gb and not self._size: - self._Raise("Image size must be provided when using end-at-4gb") - if self._end_4gb: - self._skip_at_start = 0x100000000 - self._size - - def CheckSize(self): - """Check that the image contents does not exceed its size, etc.""" - contents_size = 0 - for entry in self._entries.values(): - contents_size = max(contents_size, entry.pos + entry.size) - - contents_size -= self._skip_at_start - - size = self._size - if not size: - size = self._pad_before + contents_size + self._pad_after - size = tools.Align(size, self._align_size) - - if self._size and contents_size > self._size: - self._Raise("contents size %#x (%d) exceeds image size %#x (%d)" % - (contents_size, contents_size, self._size, self._size)) - if not self._size: - self._size = size - 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)) - - def _Raise(self, msg): - """Raises an error for this image - - Args: - msg: Error message to use in the raise string - Raises: - ValueError() - """ - raise ValueError("Image '%s': %s" % (self._node.path, msg)) - - def GetPath(self): - """Get the path of an image (in the FDT) - - Returns: - Full path of the node for this image - """ - return self._node.path - - def _ReadEntries(self): - for node in self._node.subnodes: - self._entries[node.name] = Entry.Create(self, node) - - def FindEntryType(self, etype): - """Find an entry type in the image - - Args: - etype: Entry type to find - Returns: - entry matching that type, or None if not found - """ - for entry in self._entries.values(): - if entry.etype == etype: - return entry - return None + self._section = bsection.Section('main-section', self._node)
def GetEntryContents(self): - """Call ObtainContents() for each entry - - This calls each entry's ObtainContents() a few times until they all - return True. We stop calling an entry's function once it returns - True. This allows the contents of one entry to depend on another. - - After 3 rounds we give up since it's likely an error. + """Call ObtainContents() for the section """ - todo = self._entries.values() - for passnum in range(3): - next_todo = [] - for entry in todo: - if not entry.ObtainContents(): - next_todo.append(entry) - todo = next_todo - if not todo: - break - - def _SetEntryPosSize(self, name, pos, size): - """Set the position and size of an entry - - Args: - name: Entry name to update - pos: New position - size: New size - """ - entry = self._entries.get(name) - if not entry: - self._Raise("Unable to set pos/size for unknown entry '%s'" % name) - entry.SetPositionSize(self._skip_at_start + pos, size) + self._section.GetEntryContents()
def GetEntryPositions(self): """Handle entries that want to set the position/size of other entries @@ -186,119 +60,36 @@ class Image: This calls each entry's GetPositions() method. If it returns a list of entries to update, it updates them. """ - for entry in self._entries.values(): - pos_dict = entry.GetPositions() - for name, info in pos_dict.iteritems(): - self._SetEntryPosSize(name, *info) + self._section.GetEntryPositions()
def PackEntries(self): """Pack all entries into the image""" - pos = self._skip_at_start - for entry in self._entries.values(): - pos = entry.Pack(pos) + self._section.PackEntries()
- def _SortEntries(self): - """Sort entries by position""" - entries = sorted(self._entries.values(), key=lambda entry: entry.pos) - self._entries.clear() - for entry in entries: - self._entries[entry._node.name] = entry + def CheckSize(self): + """Check that the image contents does not exceed its size, etc.""" + self._size = self._section.CheckSize()
def CheckEntries(self): """Check that entries do not overlap or extend outside the image""" - if self._sort: - self._SortEntries() - pos = 0 - prev_name = 'None' - for entry in self._entries.values(): - if (entry.pos < self._skip_at_start or - entry.pos >= self._skip_at_start + self._size): - entry.Raise("Position %#x (%d) is outside the image starting " - "at %#x (%d)" % - (entry.pos, entry.pos, self._skip_at_start, - self._skip_at_start)) - if entry.pos < pos: - entry.Raise("Position %#x (%d) overlaps with previous entry '%s' " - "ending at %#x (%d)" % - (entry.pos, entry.pos, prev_name, pos, pos)) - pos = entry.pos + entry.size - prev_name = entry.GetPath() + self._section.CheckEntries()
def ProcessEntryContents(self): """Call the ProcessContents() method for each entry
This is intended to adjust the contents as needed by the entry type. """ - for entry in self._entries.values(): - entry.ProcessContents() + self._section.ProcessEntryContents()
def WriteSymbols(self): """Write symbol values into binary files for access at run time""" - for entry in self._entries.values(): - entry.WriteSymbols(self) + self._section.WriteSymbols()
def BuildImage(self): """Write the image to a file""" fname = tools.GetOutputFilename(self._filename) with open(fname, 'wb') as fd: - fd.write(chr(self._pad_byte) * self._size) + self._section.BuildSection(fd, 0)
- for entry in self._entries.values(): - data = entry.GetData() - fd.seek(self._pad_before + entry.pos - self._skip_at_start) - fd.write(data) - - def LookupSymbol(self, sym_name, optional, msg): - """Look up a symbol in an ELF file - - Looks up a symbol in an ELF file. Only entry types which come from an - ELF image can be used by this function. - - At present the only entry property supported is pos. - - Args: - sym_name: Symbol name in the ELF file to look up in the format - _binman_<entry>_prop_<property> where <entry> is the name of - the entry and <property> is the property to find (e.g. - _binman_u_boot_prop_pos). As a special case, you can append - _any to <entry> to have it search for any matching entry. E.g. - _binman_u_boot_any_prop_pos will match entries called u-boot, - u-boot-img and u-boot-nodtb) - optional: True if the symbol is optional. If False this function - will raise if the symbol is not found - msg: Message to display if an error occurs - - Returns: - Value that should be assigned to that symbol, or None if it was - optional and not found - - Raises: - ValueError if the symbol is invalid or not found, or references a - property which is not supported - """ - m = re.match(r'^_binman_(\w+)_prop_(\w+)$', sym_name) - if not m: - raise ValueError("%s: Symbol '%s' has invalid format" % - (msg, sym_name)) - entry_name, prop_name = m.groups() - entry_name = entry_name.replace('_', '-') - entry = self._entries.get(entry_name) - if not entry: - if entry_name.endswith('-any'): - root = entry_name[:-4] - for name in self._entries: - if name.startswith(root): - rest = name[len(root):] - if rest in ['', '-img', '-nodtb']: - entry = self._entries[name] - if not entry: - err = ("%s: Entry '%s' not found in list (%s)" % - (msg, entry_name, ','.join(self._entries.keys()))) - if optional: - print('Warning: %s' % err, file=sys.stderr) - return None - raise ValueError(err) - if prop_name == 'pos': - return entry.pos - else: - raise ValueError("%s: No such property '%s'" % (msg, prop_name)) + def GetEntries(self): + return self._section.GetEntries() diff --git a/tools/binman/image_test.py b/tools/binman/image_test.py index 44a5a2c010f..45dd2378c8a 100644 --- a/tools/binman/image_test.py +++ b/tools/binman/image_test.py @@ -12,25 +12,28 @@ from elf_test import capture_sys_output class TestImage(unittest.TestCase): def testInvalidFormat(self): image = Image('name', 'node', test=True) + section = image._section with self.assertRaises(ValueError) as e: - image.LookupSymbol('_binman_something_prop_', False, 'msg') + section.LookupSymbol('_binman_something_prop_', False, 'msg') self.assertIn( "msg: Symbol '_binman_something_prop_' has invalid format", str(e.exception))
def testMissingSymbol(self): image = Image('name', 'node', test=True) - image._entries = {} + section = image._section + section._entries = {} with self.assertRaises(ValueError) as e: - image.LookupSymbol('_binman_type_prop_pname', False, 'msg') + section.LookupSymbol('_binman_type_prop_pname', False, 'msg') self.assertIn("msg: Entry 'type' not found in list ()", str(e.exception))
def testMissingSymbolOptional(self): image = Image('name', 'node', test=True) - image._entries = {} + section = image._section + section._entries = {} with capture_sys_output() as (stdout, stderr): - val = image.LookupSymbol('_binman_type_prop_pname', True, 'msg') + val = section.LookupSymbol('_binman_type_prop_pname', True, 'msg') self.assertEqual(val, None) self.assertEqual("Warning: msg: Entry 'type' not found in list ()\n", stderr.getvalue()) @@ -38,7 +41,8 @@ class TestImage(unittest.TestCase):
def testBadProperty(self): image = Image('name', 'node', test=True) - image._entries = {'u-boot': 1} + section = image._section + section._entries = {'u-boot': 1} with self.assertRaises(ValueError) as e: - image.LookupSymbol('_binman_u_boot_prop_bad', False, 'msg') + section.LookupSymbol('_binman_u_boot_prop_bad', False, 'msg') self.assertIn("msg: No such property 'bad", str(e.exception))