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binman: Build FIT image subentries with the section etype

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When reading subentries of each image, the FIT entry type directly
concatenates their contents without padding them according to their
offset, size, align, align-size, align-end, pad-before, pad-after
properties.

This patch makes sure these properties are respected by offloading this
image-data building to the section etype, where each subnode of the
"images" node is processed as a section. Alignments and offsets are
respective to the beginning of each image. For example, the following
fragment can end up having "u-boot-spl" start at 0x88 within the final
FIT binary, while "u-boot" would then end up starting at e.g. 0x20088.

	fit {
		description = "example";

		images {
			kernel-1 {
				description = "U-Boot with SPL";
				type = "kernel";
				arch = "arm64";
				os = "linux";
				compression = "none";

				u-boot-spl {
				};
				u-boot {
					align = <0x10000>;
				};
			};
		};
	}

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reinstate check in testPadInSections(), squash in
   "binman: Allow FIT binaries to have missing external blobs"
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
This commit is contained in:
Alper Nebi Yasak 2020-08-31 12:58:20 +03:00 committed by Simon Glass
parent 3fdeb14d95
commit fe05701b05
4 changed files with 169 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

56
tools/binman/etype/fit.py
View file

@ -55,14 +55,14 @@ class Entry_fit(Entry):
"""
Members:
_fit: FIT file being built
_fit_content: dict:
_fit_sections: dict:
key: relative path to entry Node (from the base of the FIT)
value: List of Entry objects comprising the contents of this
value: Entry_section object comprising the contents of this
node
"""
super().__init__(section, etype, node)
self._fit = None
self._fit_content = defaultdict(list)
self._fit_sections = {}
self._fit_props = {}
def ReadNode(self):
@ -91,15 +91,23 @@ class Entry_fit(Entry):
rel_path = node.path[len(base_node.path):]
has_images = depth == 2 and rel_path.startswith('/images/')
if has_images:
# This node is a FIT subimage node (e.g. "/images/kernel")
# containing content nodes. We collect the subimage nodes and
# section entries for them here to merge the content subnodes
# together and put the merged contents in the subimage node's
# 'data' property later.
entry = Entry.Create(self.section, node, etype='section')
entry.ReadNode()
self._fit_sections[rel_path] = entry
for subnode in node.subnodes:
if has_images and not (subnode.name.startswith('hash') or
subnode.name.startswith('signature')):
# This is a content node. We collect all of these together
# and put them in the 'data' property. They do not appear
# in the FIT.
entry = Entry.Create(self.section, subnode)
entry.ReadNode()
self._fit_content[rel_path].append(entry)
# This subnode is a content node not meant to appear in
# the FIT (e.g. "/images/kernel/u-boot"), so don't call
# fsw.add_node() or _AddNode() for it.
pass
else:
with fsw.add_node(subnode.name):
_AddNode(base_node, depth + 1, subnode)
@ -123,9 +131,8 @@ class Entry_fit(Entry):
This adds the 'data' properties to the input ITB (Image-tree Binary)
then runs mkimage to process it.
"""
# self._BuildInput() either returns bytes or raises an exception.
data = self._BuildInput(self._fdt)
if data == False:
return False
uniq = self.GetUniqueName()
input_fname = tools.GetOutputFilename('%s.itb' % uniq)
output_fname = tools.GetOutputFilename('%s.fit' % uniq)
@ -150,15 +157,30 @@ class Entry_fit(Entry):
Returns:
New fdt contents (bytes)
"""
for path, entries in self._fit_content.items():
for path, section in self._fit_sections.items():
node = fdt.GetNode(path)
data = b''
for entry in entries:
if not entry.ObtainContents():
return False
data += entry.GetData()
# Entry_section.ObtainContents() either returns True or
# raises an exception.
section.ObtainContents()
section.Pack(0)
data = section.GetData()
node.AddData('data', data)
fdt.Sync(auto_resize=True)
data = fdt.GetContents()
return data
def CheckMissing(self, missing_list):
"""Check if any entries in this FIT have missing external blobs
If there are missing blobs, the entries are added to the list
Args:
missing_list: List of Entry objects to be added to
"""
for path, section in self._fit_sections.items():
section.CheckMissing(missing_list)
def SetAllowMissing(self, allow_missing):
for section in self._fit_sections.values():
section.SetAllowMissing(allow_missing)

32
tools/binman/ftest.py
View file

@ -3491,5 +3491,37 @@ class TestFunctional(unittest.TestCase):
U_BOOT_DATA)
self.assertEqual(expected, data)
def testFitImageSubentryAlignment(self):
"""Test relative alignability of FIT image subentries"""
entry_args = {
'test-id': TEXT_DATA,
}
data, _, _, _ = self._DoReadFileDtb('167_fit_image_subentry_alignment.dts',
entry_args=entry_args)
dtb = fdt.Fdt.FromData(data)
dtb.Scan()
node = dtb.GetNode('/images/kernel')
data = dtb.GetProps(node)["data"].bytes
align_pad = 0x10 - (len(U_BOOT_SPL_DATA) % 0x10)
expected = (tools.GetBytes(0, 0x20) + U_BOOT_SPL_DATA +
tools.GetBytes(0, align_pad) + U_BOOT_DATA)
self.assertEqual(expected, data)
node = dtb.GetNode('/images/fdt-1')
data = dtb.GetProps(node)["data"].bytes
expected = (U_BOOT_SPL_DTB_DATA + tools.GetBytes(0, 20) +
tools.ToBytes(TEXT_DATA) + tools.GetBytes(0, 30) +
U_BOOT_DTB_DATA)
self.assertEqual(expected, data)
def testFitExtblobMissingOk(self):
"""Test a FIT with a missing external blob that is allowed"""
with test_util.capture_sys_output() as (stdout, stderr):
self._DoTestFile('168_fit_missing_blob.dts',
allow_missing=True)
err = stderr.getvalue()
self.assertRegex(err, "Image 'main-section'.*missing.*: blob-ext")
if __name__ == "__main__":
unittest.main()

57
tools/binman/test/167_fit_image_subentry_alignment.dts Normal file
View file

@ -0,0 +1,57 @@
// SPDX-License-Identifier: GPL-2.0+
/dts-v1/;
/ {
#address-cells = <1>;
#size-cells = <1>;
binman {
fit {
description = "test-desc";
#address-cells = <1>;
images {
kernel {
description = "Offset-Align Test";
type = "kernel";
arch = "arm64";
os = "linux";
compression = "none";
load = <00000000>;
entry = <00000000>;
u-boot-spl {
offset = <0x20>;
};
u-boot {
align = <0x10>;
};
};
fdt-1 {
description = "Pad-Before-After Test";
type = "flat_dt";
arch = "arm64";
compression = "none";
u-boot-spl-dtb {
};
text {
text-label = "test-id";
pad-before = <20>;
pad-after = <30>;
};
u-boot-dtb {
};
};
};
configurations {
default = "conf-1";
conf-1 {
description = "Kernel with FDT blob";
kernel = "kernel";
fdt = "fdt-1";
};
};
};
};
};

41
tools/binman/test/168_fit_missing_blob.dts Normal file
View file

@ -0,0 +1,41 @@
// SPDX-License-Identifier: GPL-2.0+
/dts-v1/;
/ {
#address-cells = <1>;
#size-cells = <1>;
binman {
u-boot {
};
fit {
description = "test-desc";
#address-cells = <1>;
fit,fdt-list = "of-list";
images {
kernel {
description = "ATF BL31";
type = "kernel";
arch = "ppc";
os = "linux";
compression = "gzip";
load = <00000000>;
entry = <00000000>;
hash-1 {
algo = "crc32";
};
hash-2 {
algo = "sha1";
};
blob-ext {
filename = "missing";
};
};
};
};
u-boot-nodtb {
};
};
};