In some cases you need to add a property but the contents of it
are not known at creation time, merely the extend of it.
This method allows you to create a property of a given size (filled
with garbage) while a pointer to the property data will be provided.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[dwg: Corrected commit message]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, both legacy (linux,phandle) and ePAPR (phandle) properties
are inserted into dtbs by default. The newer ePAPR style has been
supported in dtc and Linux kernel for 7 years. That should be a long
enough transition period. We can save a little space by not putting both
into the dtb.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add an fdtoverlay unit test. Applies applies overlay(s) and then
retrieves an inserted property to verify.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Since libfdt support overlay application on FDT blobs, provide
a command line tool that applies an arbitrary number of
overlays, one after another to a base fdt blob and output
the result in the given file.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The -d and -s options were undocumented. Add an entry in the manual.
Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2a42b14 "dtc: check.c fix compile error" changed a format string using
%lx which wasn't correct for all platforms. Unfortunately it changed it to
%zx, which is wrong for a different set of platforms (and only right on
the others by accident). The parameter we're formatting here is uint64_t,
not size_t, so we need to use the PRIx64 macro from <inttypes.h> to get
this right.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The host compiler on MSYS2 and Cygwin does not allow the -fPIC option,
issuing a warning that is treated as an error and stops the build.
Detect whether we're running under MSYS2 or Cygwin and avoid adding
-fPIC to prevent the error from happening.
Tested on Linux, MSYS2 and Cygwin.
Signed-off-by: Carles Cufi <carles.cufi@gmail.com>
[dwg: Added explicit empty CFLAGS for clarity]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
- Allow overriding of shared library compile time flags for platforms whic
need it
- Include -fPIC in the link flags variable instead of including it raw
in the target rule
- Cosmetic formatting tweaks
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Since 548aea2 "fdtdump: Discourage use of fdtdump", fdtdump unconditionally
prints a message discouraging its own use except for debugging purposes.
This shows up messily in the "make check" output, so suppress it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Fix the following compile error found on odroid-xu4:
checks.c: In function ‘check_simple_bus_reg’:
checks.c:876:41: error: format ‘%lx’ expects argument of type
‘long unsigned int’, but argument 4 has type
‘uint64_t{aka long long unsigned int}’ [-Werror=format=]
snprintf(unit_addr, sizeof(unit_addr), "%lx", reg);
^
checks.c:876:41: error: format ‘%lx’ expects argument of type
‘long unsigned int’, but argument 4 has type
‘uint64_t {aka long long unsigned int}’ [-Werror=format=]
cc1: all warnings being treated as errors
Makefile:304: recipe for target 'checks.o' failed
make: *** [checks.o] Error 1
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
[dwg: Correct new format to be correct in general]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When determining if to recurse into a node, get_node_by_path does not
check if the length of each node name is equal. If searching for
/foo/baz, this can result in recursing into /foobar because
strneq("foo", "foobar", 3) is true.
This can result in a reference to /foo/baz to be incorrectly set to
/foobar/baz. A test for this was added.
Signed-off-by: Tim Montague <tmontague@ghs.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
fdtdump is, and always has been, a quick-and-dirty debugging tool. However
I keep getting reports of people using it for real work. For production
decompiling of a dtb, dtc in -I dtb -O dts mode is the right tool. In the
hopes of getting that message out there, add a warning message to fdtdump
to discourage its use.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
It's perfectly valid for a dtb to have version and last compat version set
to the same value, and that value can be 17 (the latest defined version).
However, since 0931cea "dtc: fdtdump: check fdt if not in scanning mode"
fdtdump will refuse to process such a dtb. We get away with this in many
cases because dtc's typical output has last compat version equal to 16,
rather than 17, but it's still a bug.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
These were noticed when synching with U-Boot's downstream tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Since we are using the standard .i extension for the swig file, we can use
setup.py to build the wrapper. Drop the existing build code since it is
not needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The current mechanism uses a shell construct, but it seems better to use
a Makefile approach.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present we require that setup.py is executed from the Makefile, which
sets up various important things like the list of files to build and the
version number.
However many installation systems expect to be able to change to the
directory containing setup.py and run it. This allows them to support (for
example) building/installing for multiple Python versions, varying
installation paths, particular C flags, etc.
The problem in implementing this is that we don't want to duplicate the
information in the Makefile. A common solution (so I am told) is to parse
the Makefile to obtain the required information.
Update the setup.py script to read a few Makefiles when it does not see
the required information in its environment. This allows installation
using:
./pylibfdt/setup.py install
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
I've recently signed up dtc for Coverity Scan coverage. This adds magic
to the .travis.yml file to submit builds to Coverity for analysis.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We should follow PEP8 even for our setup() call.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The .i extension allows Python distutils to automatically handle the swig
file. Rename it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The existing function to add a new property to a tree being built requires
that the entire contents of the new property be passed in. For some
applications it is more convenient to be able to add the property contents
later, perhaps by reading from a file. This avoids double-buffering of the
contents.
Add a new function to support this and adjust the existing fdt_property() to
use it.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This is in a separate patch since I not sure if GNU make features
are permitted in the Makefile.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Use the same version number in the module as with the rest of libfdt. This
can be examined with:
import pkg_resources
print pkg_resources.require('libfdt')[0].version
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Adjust the setup script to support installation, and call it from the
Makefile if enabled. It will be disabled if we were unable to build the
module (e.g. due to swig being missing), or the NO_PYTHON environment
variable is set.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Some build systems want to build python libraries separately from the
rest of the build.
Add a NO_PYTHON option to enable this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
To make sure the Makefile behaves in both cases, make Travis matrix builds
with and without swig installed.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present we manually move _libfdt.so into the correct place. Provide a
package directory so we can avoid needing to do this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present setup.py adjusts its command line when running, so that the
C flags and file list can be passed as arguments. Pass them in environment
variables instead, so we can avoid this messiness. It also allows us to
support the 'install' command.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Some build systems have their own version of the pkg-config tool.
Use a variable for this instead of hard-coding it, to allow for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Mike Frysinger <vapier@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
If swig and the Python are available, build pylibfdt automatically.
Adjust the tests to run Python tests too in this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
[dwg: Make error message clearer that missing swig or python-dev isn't
fatal to the whole build]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
There are a few places where libfdt.h cannot be used as is with swig:
- macros like fdt_totalsize() have to be defined as C declarations
- fdt_offset_ptr() and fdt_getprop_namelen() need special treatment due to
a TODO in the wrapper for fdt_getprop(). However they are not useful to
Python so can be removed
Add #ifdefs to work around these problem.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a note about pylibfdt in the README.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add a set of tests to cover the functionality in pylibfdt.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add Python bindings for a bare-bones set of libfdt functions. These allow
navigating the tree and reading node names and properties.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Node name unit-addresses should generally never begin with 0x or leading
0s. Add warnings to check for these cases, but only for nodes without a
known bus type as there should be better bus specific checks of the
unit address in those cases. Any unit addresses that don't follow the
general rule will need to add a new bus type. There aren't any known
ones ATM.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add checks to identify simple-bus bus types and checks for child
devices. Simple-bus type is generally identified by "simple-bus"
compatible string. We also treat the root as a simple-bus, but only for
child nodes with reg property.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Add PCI bridge and device node checks. We identify PCI bridges with
'device_type = "pci"' as only PCI bridges should set that property. For
bridges, check that node name is pci or pcie, ranges and bus-range are
present, and #address-cells and #size-cells are correct.
For devices, check the reg property fields are correct for the first
element (the config address). Check that the unit address is formatted
corectly based on the reg property. Device unit addresses are in the
form DD or DD,F where DD is the device 0-0x1f and F is the function 0-7.
Also, check that the bus number is within the expected range defined by
bridge's bus-ranges.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Rob Herring <robh@kernel.org>
[dwg: Added a missing check dependency]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When clang checks the documentation tags (with -Wdocumentation flag), it
reports the following warning:
fdtput.c:70:11: error: parameter '*value_len' not found in the
function declaration [-Werror,-Wdocumentation]
* @param *value_len Returns length of value encoded
^~~~~~~~~~
fdtput.c:70:11: note: did you mean 'value_len'?
* @param *value_len Returns length of value encoded
^~~~~~~~~~
value_len
As this sounds reasonable, remove the star from the documentation tag.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This bug has been found by using clang Static Analyzer: it reported that
the value stored to fdt was never read.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
overlay_update_local_node_references() saves the result of
fdt_subnode_offset() into variable tree_child but checks for variable
ret afterwards. As this does not make sense, check tree_child instead of
ret.
This bug has been found by compiling with clang. The compiler reported
the following warning:
libfdt/fdt_overlay.c:275:7: error: variable 'ret' may be
uninitialized when used here
[-Werror,-Wconditional-uninitialized]
if (ret == -FDT_ERR_NOTFOUND)
^~~
libfdt/fdt_overlay.c:210:9: note: initialize the variable 'ret' to
silence this
warning
int ret;
^
= 0
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Using %.*s format helps making asm_emit_string() not modify its "str"
parameter.
While at it, constify the "str" parameter of bin_emit_string() and
asm_emit_string(), as these function no longer modify it.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The default libfdt_env.h (for POSIXish userland builds) supports sparse
checking. It has a couple of helper macros, __force and __bitwise which
expand the relevant sparse attributes to enable checking for incorrect
or missing endian conversions.
Those are bad names: for one, leading underscores are supposed to be
reserved for the system libraries, and worse, some systems (including
RHEL7) do define those names already.
So change them to FDT_FORCE and FDT_BITWISE which are far less likely to
have collisions.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This fixes a great many sparse warnings on the fdt and libfdt sources.
These are mostly due to incorrect mixing of endian annotated and native
integer types.
This includes fixing a couple of quasi-bugs where we had endian conversions
the wrong way around (this will have the right effect in practice, but is
certainly conceptually incorrect).
This doesn't make the whole tree sparse clean: there are many warnings in
bison and lex generated code, and there are a handful of other remaining
warnings that are (for now) more trouble than they're worth to fix (and
are not genuine bugs).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We have a number of explicit __GNUC__ conditionals to tell if we want to
use some gcc extensions for extra warnings. This cleans this up to use
a single conditional, defining convenience macros for those attributes.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
struct fdt_reserve_entry is defined in fdt.h to exactly mirror the
in-memory layout of a reserve entry in the flattened tree. Since that is
always big-endian, it uses fdt64_t elements, which have sparse annotations
marking them as not native endian.
However, in dtc, we also use struct fdt_reserve_entry inside struct
reserve_info, and use it with native endian values. This will cause sparse
errors.
This stops this abuse, making struct reserve_info have its own native
endian fields for the same information.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Pantelis Antoniou