From 4f9f1056ecf2d9e54803b89fd0784240a8d89fd8 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 9 Jul 2020 18:39:38 -0600 Subject: [PATCH] binman: Allow external binaries to be missing Sometimes it is useful to build an image even though external binaries are not present. This allows the build system to continue to function without these files, albeit not producing valid images. U-Boot does with with ATF (ARM Trusted Firmware) today. Add a new flag to binman to request this behaviour. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- tools/binman/README.entries | 3 +++ tools/binman/cmdline.py | 2 ++ tools/binman/control.py | 7 +++++-- tools/binman/entry.py | 9 +++++++++ tools/binman/etype/blob_ext.py | 13 ++++++++++--- tools/binman/etype/section.py | 24 ++++++++++++++++++++++++ tools/binman/ftest.py | 8 +++++++- tools/patman/tools.py | 8 ++++++-- 8 files changed, 66 insertions(+), 8 deletions(-) diff --git a/tools/binman/README.entries b/tools/binman/README.entries index 46f6ab1..f45f514 100644 --- a/tools/binman/README.entries +++ b/tools/binman/README.entries @@ -48,6 +48,9 @@ Entry: blob-ext: Entry containing an externally built binary blob Note: This should not be used by itself. It is normally used as a parent class by other entry types. +If the file providing this blob is missing, binman can optionally ignore it +and produce a broken image with a warning. + See 'blob' for Properties / Entry arguments. diff --git a/tools/binman/cmdline.py b/tools/binman/cmdline.py index 1e38593..bb4d9d1 100644 --- a/tools/binman/cmdline.py +++ b/tools/binman/cmdline.py @@ -53,6 +53,8 @@ controlled by a description in the board device tree.''' help='Add a path to the list of directories to use for input files') build_parser.add_argument('-m', '--map', action='store_true', default=False, help='Output a map file for each image') + build_parser.add_argument('-M', '--allow-missing', action='store_true', + default=False, help='Allow external blobs to be missing') build_parser.add_argument('-O', '--outdir', type=str, action='store', help='Path to directory to use for intermediate and ' 'output files') diff --git a/tools/binman/control.py b/tools/binman/control.py index dc1dd2a..8c6eae8 100644 --- a/tools/binman/control.py +++ b/tools/binman/control.py @@ -387,7 +387,7 @@ def PrepareImagesAndDtbs(dtb_fname, select_images, update_fdt): def ProcessImage(image, update_fdt, write_map, get_contents=True, - allow_resize=True): + allow_resize=True, allow_missing=False): """Perform all steps for this image, including checking and # writing it. This means that errors found with a later image will be reported after @@ -402,8 +402,10 @@ def ProcessImage(image, update_fdt, write_map, get_contents=True, the contents is already present allow_resize: True to allow entries to change size (this does a re-pack of the entries), False to raise an exception + allow_missing: Allow blob_ext objects to be missing """ if get_contents: + image.SetAllowMissing(allow_missing) image.GetEntryContents() image.GetEntryOffsets() @@ -523,7 +525,8 @@ def Binman(args): images = PrepareImagesAndDtbs(dtb_fname, args.image, args.update_fdt) for image in images.values(): - ProcessImage(image, args.update_fdt, args.map) + ProcessImage(image, args.update_fdt, args.map, + allow_missing=args.allow_missing) # Write the updated FDTs to our output files for dtb_item in state.GetAllFdts(): diff --git a/tools/binman/entry.py b/tools/binman/entry.py index 90ffd27..9388586 100644 --- a/tools/binman/entry.py +++ b/tools/binman/entry.py @@ -794,3 +794,12 @@ features to produce new behaviours. 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 diff --git a/tools/binman/etype/blob_ext.py b/tools/binman/etype/blob_ext.py index cc8d91b..51779c8 100644 --- a/tools/binman/etype/blob_ext.py +++ b/tools/binman/etype/blob_ext.py @@ -18,6 +18,9 @@ class Entry_blob_ext(Entry_blob): Note: This should not be used by itself. It is normally used as a parent class by other entry types. + If the file providing this blob is missing, binman can optionally ignore it + and produce a broken image with a warning. + See 'blob' for Properties / Entry arguments. """ def __init__(self, section, etype, node): @@ -26,6 +29,10 @@ class Entry_blob_ext(Entry_blob): def ObtainContents(self): self._filename = self.GetDefaultFilename() - self._pathname = tools.GetInputFilename(self._filename) - self.ReadBlobContents() - return True + self._pathname = tools.GetInputFilename(self._filename, + self.section.GetAllowMissing()) + # Allow the file to be missing + if not self._pathname: + self.SetContents(b'') + return True + return super().ObtainContents() diff --git a/tools/binman/etype/section.py b/tools/binman/etype/section.py index f108121..9b718f1 100644 --- a/tools/binman/etype/section.py +++ b/tools/binman/etype/section.py @@ -34,6 +34,11 @@ class Entry_section(Entry): name-prefix: Adds a prefix to the name of every entry in the section when writing out the map + Properties: + _allow_missing: True if this section permits external blobs to be + missing their contents. The second will produce an image but of + course it will not work. + Since a section is also an entry, it inherits all the properies of entries too. @@ -49,6 +54,7 @@ class Entry_section(Entry): self._sort = False self._skip_at_start = None self._end_4gb = False + self._allow_missing = False def ReadNode(self): """Read properties from the image node""" @@ -535,3 +541,21 @@ class Entry_section(Entry): def WriteChildData(self, child): return True + + def SetAllowMissing(self, allow_missing): + """Set whether a section allows missing external blobs + + Args: + allow_missing: True if allowed, False if not allowed + """ + self._allow_missing = allow_missing + for entry in self._entries.values(): + entry.SetAllowMissing(allow_missing) + + def GetAllowMissing(self): + """Get whether a section allows missing external blobs + + Returns: + True if allowed, False if not allowed + """ + return self._allow_missing diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py index f8d5191..7c8b3eb 100644 --- a/tools/binman/ftest.py +++ b/tools/binman/ftest.py @@ -285,7 +285,7 @@ class TestFunctional(unittest.TestCase): def _DoTestFile(self, fname, debug=False, map=False, update_dtb=False, entry_args=None, images=None, use_real_dtb=False, - verbosity=None): + verbosity=None, allow_missing=False): """Run binman with a given test file Args: @@ -319,6 +319,8 @@ class TestFunctional(unittest.TestCase): if entry_args: for arg, value in entry_args.items(): args.append('-a%s=%s' % (arg, value)) + if allow_missing: + args.append('-M') if images: for image in images: args += ['-i', image] @@ -3376,6 +3378,10 @@ class TestFunctional(unittest.TestCase): self.assertIn("Filename 'missing-file' not found in input path", str(e.exception)) + def testExtblobMissingOk(self): + """Test an image with an missing external blob that is allowed""" + self._DoTestFile('158_blob_ext_missing.dts', allow_missing=True) + if __name__ == "__main__": unittest.main() diff --git a/tools/patman/tools.py b/tools/patman/tools.py index f402b9a..d41115a 100644 --- a/tools/patman/tools.py +++ b/tools/patman/tools.py @@ -114,14 +114,16 @@ def SetInputDirs(dirname): indir = dirname tout.Debug("Using input directories %s" % indir) -def GetInputFilename(fname): +def GetInputFilename(fname, allow_missing=False): """Return a filename for use as input. Args: fname: Filename to use for new file + allow_missing: True if the filename can be missing Returns: - The full path of the filename, within the input directory + The full path of the filename, within the input directory, or + None on error """ if not indir or fname[:1] == '/': return fname @@ -130,6 +132,8 @@ def GetInputFilename(fname): if os.path.exists(pathname): return pathname + if allow_missing: + return None raise ValueError("Filename '%s' not found in input path (%s) (cwd='%s')" % (fname, ','.join(indir), os.getcwd())) -- 2.7.4