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binman: Allow updating entries that change size

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So far we don't allow entries to change size when repacking. But this is
not very useful since it is common for entries to change size after an
updated binary is built, etc.

Add support for this, respecting the original offset/size/alignment
constraints of the image layout. For this to work the original image
must have been created with the 'allow-repack' property.

This does not support entry types with sub-entries such as files and
CBFS, but it does support sections.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2019-07-20 12:23:56 -06:00
parent eba1f0cc94
commit 51014aabc2
7 changed files with 113 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

69
tools/binman/ftest.py
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@@ -2724,7 +2724,8 @@ class TestFunctional(unittest.TestCase):
self.assertEqual(len(U_BOOT_DATA), entry.contents_size)
self.assertEqual(len(U_BOOT_DATA), entry.size)
def _RunReplaceCmd(self, entry_name, data, decomp=True):
def _RunReplaceCmd(self, entry_name, data, decomp=True, allow_resize=True,
dts='132_replace.dts'):
"""Replace an entry in an image
This writes the entry data to update it, then opens the updated file and
@@ -2735,13 +2736,16 @@ class TestFunctional(unittest.TestCase):
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
allow_resize: True to allow entries to change size, False to raise
an exception
Returns:
Tuple:
data from entry
data from fdtmap (excluding header)
Image object that was modified
"""
dtb_data = self._DoReadFileDtb('132_replace.dts', use_real_dtb=True,
dtb_data = self._DoReadFileDtb(dts, use_real_dtb=True,
update_dtb=True)[1]
self.assertIn('image', control.images)
@@ -2753,21 +2757,24 @@ class TestFunctional(unittest.TestCase):
image_fname = tools.GetOutputFilename('image.bin')
updated_fname = tools.GetOutputFilename('image-updated.bin')
tools.WriteFile(updated_fname, tools.ReadFile(image_fname))
control.WriteEntry(updated_fname, entry_name, data, decomp)
image = control.WriteEntry(updated_fname, entry_name, data, decomp,
allow_resize)
data = control.ReadEntry(updated_fname, entry_name, decomp)
# The DT data should not change
new_dtb_data = entries['u-boot-dtb'].data
self.assertEqual(new_dtb_data, orig_dtb_data)
new_fdtmap_data = entries['fdtmap'].data
self.assertEqual(new_fdtmap_data, orig_fdtmap_data)
# The DT data should not change unless resized:
if not allow_resize:
new_dtb_data = entries['u-boot-dtb'].data
self.assertEqual(new_dtb_data, orig_dtb_data)
new_fdtmap_data = entries['fdtmap'].data
self.assertEqual(new_fdtmap_data, orig_fdtmap_data)
return data, orig_fdtmap_data[fdtmap.FDTMAP_HDR_LEN:]
return data, orig_fdtmap_data[fdtmap.FDTMAP_HDR_LEN:], image
def testReplaceSimple(self):
"""Test replacing a single file"""
expected = b'x' * len(U_BOOT_DATA)
data, expected_fdtmap = self._RunReplaceCmd('u-boot', expected)
data, expected_fdtmap, _ = self._RunReplaceCmd('u-boot', expected,
allow_resize=False)
self.assertEqual(expected, data)
# Test that the state looks right. There should be an FDT for the fdtmap
@@ -2775,7 +2782,7 @@ class TestFunctional(unittest.TestCase):
# 'control' tables. Checking for an FDT that does not exist should
# return None.
path, fdtmap = state.GetFdtContents('fdtmap')
self.assertIsNone(path)
self.assertIsNotNone(path)
self.assertEqual(expected_fdtmap, fdtmap)
dtb = state.GetFdtForEtype('fdtmap')
@@ -2794,7 +2801,8 @@ class TestFunctional(unittest.TestCase):
"""Test replacing a file by something larger"""
expected = U_BOOT_DATA + b'x'
with self.assertRaises(ValueError) as e:
self._RunReplaceCmd('u-boot', expected)
self._RunReplaceCmd('u-boot', expected, allow_resize=False,
dts='139_replace_repack.dts')
self.assertIn("Node '/u-boot': Entry data size does not match, but resize is disabled",
str(e.exception))
@@ -2806,7 +2814,8 @@ class TestFunctional(unittest.TestCase):
updated_fname = tools.GetOutputFilename('image-updated.bin')
tools.WriteFile(updated_fname, data)
entry_name = 'u-boot'
control.WriteEntry(updated_fname, entry_name, expected)
control.WriteEntry(updated_fname, entry_name, expected,
allow_resize=False)
data = control.ReadEntry(updated_fname, entry_name)
self.assertEqual(expected, data)
@@ -2818,7 +2827,8 @@ class TestFunctional(unittest.TestCase):
updated_fname = tools.GetOutputFilename('first-updated.bin')
tools.WriteFile(updated_fname, tools.ReadFile(image_fname))
entry_name = 'u-boot'
control.WriteEntry(updated_fname, entry_name, expected)
control.WriteEntry(updated_fname, entry_name, expected,
allow_resize=False)
data = control.ReadEntry(updated_fname, entry_name)
self.assertEqual(expected, data)
@@ -2911,6 +2921,37 @@ class TestFunctional(unittest.TestCase):
"""Test an image header at the end of an image with undefined size"""
self._DoReadFileRealDtb('138_fdtmap_hdr_nosize.dts')
def testReplaceResize(self):
"""Test replacing a single file in an entry with a larger file"""
expected = U_BOOT_DATA + b'x'
data, _, image = self._RunReplaceCmd('u-boot', expected,
dts='139_replace_repack.dts')
self.assertEqual(expected, data)
entries = image.GetEntries()
dtb_data = entries['u-boot-dtb'].data
dtb = fdt.Fdt.FromData(dtb_data)
dtb.Scan()
# The u-boot section should now be larger in the dtb
node = dtb.GetNode('/binman/u-boot')
self.assertEqual(len(expected), fdt_util.GetInt(node, 'size'))
# Same for the fdtmap
fdata = entries['fdtmap'].data
fdtb = fdt.Fdt.FromData(fdata[fdtmap.FDTMAP_HDR_LEN:])
fdtb.Scan()
fnode = fdtb.GetNode('/u-boot')
self.assertEqual(len(expected), fdt_util.GetInt(fnode, 'size'))
def testReplaceResizeNoRepack(self):
"""Test replacing an entry with a larger file when not allowed"""
expected = U_BOOT_DATA + b'x'
with self.assertRaises(ValueError) as e:
self._RunReplaceCmd('u-boot', expected)
self.assertIn('Entry data size does not match, but allow-repack is not present for this image',
str(e.exception))
if __name__ == "__main__":
unittest.main()