Gitiles
Code Review Sign In
LeafOS / LeafOS-Project / android_external_dtc / 7f68de32c60769c3d3217e5cec68ac68e6b97a0a
commit7f68de32c60769c3d3217e5cec68ac68e6b97a0a[log] [tgz]
authorMike McTernan <mikemcternan@google.com>Fri Jul 22 09:28:07 2022 +0100
committerPierre-Clément Tosi <ptosi@google.com>Wed Aug 10 16:28:40 2022 +0100
tree93abc88f0c753c4420cbb859d7c0a0857be98e2f
parent354123a2d174d69854cc66d989e400c066d8fd07 [diff]
ANDROID: fuzz: Rename libfdt_fuzzer.cpp to .c

Change cpp to c file ahead of further extensions to the fuzzing test
harness. This simplifies building afl-fuzz or with just C tools, but
could be made C++ again if needed in the future.

Test: build and ran libFuzzer test
Change-Id: Ibc7edc8834fa71d4bbabac826efccb49d8a1be38
Merged-In: I8873883ab5b91f36b707cd9d05856aa4c9c222bd
2 files changed
tree: 93abc88f0c753c4420cbb859d7c0a0857be98e2f
  1. Documentation/
  2. fuzzing/
  3. libfdt/
  4. pylibfdt/
  5. scripts/
  6. tests/
  7. .cirrus.yml
  8. .editorconfig
  9. .gitignore
  10. .travis.yml
  11. Android.bp
  12. BSD-2-Clause
  13. checks.c
  14. CONTRIBUTING.md
  15. convert-dtsv0-lexer.l
  16. data.c
  17. dtc-lexer.l
  18. dtc-parser.y
  19. dtc.c
  20. dtc.h
  21. dtdiff
  22. fdtdump.c
  23. fdtget.c
  24. fdtoverlay.c
  25. fdtput.c
  26. flattree.c
  27. fstree.c
  28. GPL
  29. livetree.c
  30. Makefile
  31. Makefile.convert-dtsv0
  32. Makefile.dtc
  33. Makefile.utils
  34. MANIFEST.in
  35. meson.build
  36. meson_options.txt
  37. METADATA
  38. MODULE_LICENSE_GPL
  39. NOTICE
  40. OWNERS
  41. README.license
  42. README.md
  43. README.version
  44. setup.py
  45. srcpos.c
  46. srcpos.h
  47. TODO
  48. treesource.c
  49. util.c
  50. util.h
  51. version_gen.h.in
  52. version_non_gen.h
  53. yamltree.c
README.md

Device Tree Compiler and libfdt

The source tree contains the Device Tree Compiler (dtc) toolchain for working with device tree source and binary files and also libfdt, a utility library for reading and manipulating the binary format.

dtc and libfdt are maintained by:

Python library

A Python library wrapping libfdt is also available. To build this you will need to install swig and Python development files. On Debian distributions:

$ sudo apt-get install swig python3-dev

The library provides an Fdt class which you can use like this:

$ PYTHONPATH=../pylibfdt python3
>>> import libfdt
>>> fdt = libfdt.Fdt(open('test_tree1.dtb', mode='rb').read())
>>> node = fdt.path_offset('/subnode@1')
>>> print(node)
124
>>> prop_offset = fdt.first_property_offset(node)
>>> prop = fdt.get_property_by_offset(prop_offset)
>>> print('%s=%s' % (prop.name, prop.as_str()))
compatible=subnode1
>>> node2 = fdt.path_offset('/')
>>> print(fdt.getprop(node2, 'compatible').as_str())
test_tree1

You will find tests in tests/pylibfdt_tests.py showing how to use each method. Help is available using the Python help command, e.g.:

$ cd pylibfdt
$ python3 -c "import libfdt; help(libfdt)"

If you add new features, please check code coverage:

$ sudo apt-get install python3-coverage
$ cd tests
# It's just 'coverage' on most other distributions
$ python3-coverage run pylibfdt_tests.py
$ python3-coverage html
# Open 'htmlcov/index.html' in your browser

The library can be installed with pip from a local source tree:

$ pip install . [--user|--prefix=/path/to/install_dir]

Or directly from a remote git repo:

$ pip install git+git://git.kernel.org/pub/scm/utils/dtc/dtc.git@main

The install depends on libfdt shared library being installed on the host system first. Generally, using --user or --prefix is not necessary and pip will use the default location for the Python installation which varies if the user is root or not.

You can also install everything via make if you like, but pip is recommended.

To install both libfdt and pylibfdt you can use:

$ make install [PREFIX=/path/to/install_dir]

To disable building the python library, even if swig and Python are available, use:

$ make NO_PYTHON=1

More work remains to support all of libfdt, including access to numeric values.

Mailing lists