This function deals with appending integers of various sizes (8, 16
32, and 64 bit currently). It handles endianess conversions. If the
integer will not fit in the requested number of bits of storage it
will have it's high bits ignored.
This patch also rewrites data_append_cell and data_append_addr to use
data_append_integer.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This utility routine will be used in the variable size cell literal
append code. It is a straightforward adaptation of the fdt32_to_cpu
function.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Now that we have utilfdt_read(), ftdump should use it too.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The load_blob() and save_blob() functions are very similar to the utilfdt
versions. This removes the duplicated code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This adds higher-level libfdt operations for reading/writing an fdt
blob from/to a file, as well as a function to decode a data type string
as will be used by fdtget, fdtput.
This also adds a few tests for the simple type argument supported by
utilfdt_decode_type.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
We want to avoid a separate Makefile include for each utility, so this sets
up a general one for utilities.
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Simon Glass <sjg@chromium.org>
With this patch the following property assignment:
property = <0x12345678 'a' '\r' 100>;
is equivalent to:
property = <0x12345678 0x00000061 0x0000000D 0x00000064>
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
A number of the dtc testcases trigger the new "variable set but not
used" warning from gcc 4.6. That is they have variables which are
assigned, but then never read after that point.
In a couple of cases this is just because the variables aren't needed,
so this patch removes them. In subnode_offset.c, it's because one
pair of variables we clearly intended to test we don't actually test.
This patch also adds this missing check.
This patch makes the testsuite compile clean with gcc 4.6.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Move the parsing of hex, octal and escaped characters from data.c
to util.c where it can be used for character literal parsing within
strings as well as for stand alone C style character literals.
Signed-off-by: Anton Staaf <robotboy@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This useful function is split out so it will be available to programs
other than ftdump.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The *p variable is declared and used to save inb->ptr, however p is
later never used. This has been the case since commit 6c0f3676 and can
lead to build failures with -Werror=unused-but-set-variable:
flattree.c: In function 'flat_read_mem_reserve':
flattree.c:700:14: error: variable 'p' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
make: *** [flattree.o] Error 1
Remove the variable.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Commit 376ab6f2 removed the old style check functionality from DTC,
however the check option and variable were not removed. This leads to
build failures when -Werror=unused-but-set-variable is specified:
dtc.c: In function 'main':
dtc.c:102:17: error: variable 'check' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
make: *** [dtc.o] Error 1
make: *** Waiting for unfinished jobs....
Remove the check variable.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
The libfdt shared library is only installed by its unversioned name.
Including it properly in a distribution requires installation of both
the versioned name (used in the binary-only package) and the unversioned
name (used in the development package). The latter is just a symbolic
link, so you need to change the soname in turn to include the version.
While at it, use Makefile variables to shorten some lines and avoid
cut-and-paste typos; and clean up remnants of when shared libraries were
not supported on Darwin.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch adds a "dtdiff" script to do a useful form diff of two
device trees. This automatically converts the tree to dts form (if
it's not already) and uses a new "-s" option in dtc to "sort" the
tree. That is, it sorts the reserve entries, it sorts the properties
within each node by name, and it sorts nodes by name within their
parent.
This gives a pretty sensible diff between the trees, which will ignore
semantically null internal rearrangements (directly diffing the dts
files can give a lot of noise due to the order changes).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When nodes are modified by merging device trees, nodes to be updated/merged can
be specified by a label. Specifying nodes by full path (instead of label)
doesn't quite work. This patch fixes that.
Signed-off-by: John Bonesio <bones@secretlab.ca>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
yyerror is meant to be called by the parser internal code, and it's interface
is limited. Instead create and call a new error message routine that allows
formatted strings to be used.
yyerror uses the new routine so error formatting remains consistent.
Signed-of-by: John Bonesio <bones@secretlab.ca>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Current we check for various error codes with [ $x == "NN" ]. However
'==' is not actually a correct operator for the [ (test) command. It
should be either '=' for string comparison or '-eq' for integer
comparison. It appears that the bash builtin version of test
implements '==' though, so we were getting away with it, as long as
/bin/sh was bash - or the testsuite generated no errors.
This patch fixes the usage of test so that it should work on non-bash
shells.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
During a check of the current git head of the linux kernel with the
static code analysis tool cppcheck
(http://sourceforge.net/apps/mediawiki/cppcheck/index.php?title=Main_Page)
the tool discovered a resource leak in linux-2.6/scripts/dtc/fstree.c.
Please refer the attached patch, that fixes the issue.
Fixes https://bugzilla.kernel.org/show_bug.cgi?id=15363
Signed-off-by: Martin Ettl <ettl.martin@gmx.de>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
The dtbs_equal_ordered test program is used to implement a number of
testcases. However, the test program itself has never been
particularly well tested. In addition there are testcases coming in
future for which it would be useful to have a corresponding
"dtbs_equal_unordered" which checks for equality of device trees, not
considering the internal ordering of elements. Finally, for some
tests we may want it would be useful to check trees for equality with
the PASS case being when they are *not* equal.
This patch addresses all of the above. A dtbs_equal_unordered is
added, and both it and the existing dtbs_equal_ordered program now
take a -n option to make the PASS case be where the trees are not
equal. A number of example trees with slight modifications from
test_tree1 are used to verify that both these programs correctly
identify when the tree is altered, and a dtb_reverse program is used
to verify that the unordered version does not depend on internal
ordering. These new testcases for the equality testing programs are
split out into a new test group in run_tests.sh.
dtbs_equal_unordered uses the new property iteration functions, and so
this also acts as further testing for those functions.
dtbs_equal_unordered will be useful for further testing the recently
added tree-merging code and its upcoming extensions.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
We are almost clean already with the -Wredundant-decls warning. The
only exception is a declaration for isatty() inside the flex-generated
code. This can be removed by using flex's "never-interactive" option,
which we probably should be using anyway, since we never parse
interactively in the sense that this option implies.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
For ages, we've been talking about adding functions to libfdt to allow
iteration through properties. So, finally, here are some.
I got bogged down on this for a long time because I didn't want to
expose offsets directly to properties to the callers. But without
that, attempting to make reasonable iteration functions just became
horrible. So eventually, I settled on an interface which does now
expose property offsets. fdt_first_property_offset() and
fdt_next_property_offset() are used to step through the offsets of the
properties starting from a particularly node offset. The details of
the property at each offset can then be retrieved with either
fdt_get_property_by_offset() or fdt_getprop_by_offset() which have
interfaces similar to fdt_get_property() and fdt_getprop()
respectively.
No explicit testcases are included, but we do use the new functions to
reimplement the existing fdt_get_property() function.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch turns on a bunch of extra gcc warnings, most of which are
probably a good idea. Of the new warnings -Wnested-externs and
-Wstrict-prototypes need no code changes, we're already warning-clean.
The remaining one, -Wmissing-prototypes requires trivial changes in
some of the tests (making functions local).
This patch also rearranges the warnings flags into a separate make
variable for convenience, and turns on -Werror, to really encourage
people to keep the code warning-clean.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Since util.c is used in programs other than full dtc, it shouldn't
include the full dtc.h, just util.h which has prototypes directly
relevant to it. This patch makes the change, and also adds includes
of the necessary system headers which were previously included
indirectly by dtc.h.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch allows the following construct:
/ {
property-a = "old";
property-b = "does not change";
};
/ {
property-a = "changed";
property-c = "new";
node-a {
};
};
Where the later device tree overrides the properties found in the
earlier tree. This is useful for laying down a template device tree
in an include file and modifying it for a specific board without having
to clone the entire tree.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
The somewhat embarrasing bug in the first version of my previous patch
would have been detected by valgrind. Thus reminded, I've run the
testsuite under valgrind and fixed any errors I found. This turned
out to be just some uninitialized buffers in test programs. The
fragments of uninitialized data aren't particularly important, but we
might as well squash the valgrind warnings, so that future valgrind
errors will stand out.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
At present, both the grammar and our internal data structures mean
that there can be only one label on a node or property. This is a
fairly arbitrary constraint, given that any number of value labels can
appear at the same point, and that in C you can have any number of
labels on the same statement.
This is pretty much a non-issue now, but it may become important with
some of the extensions that Grant and I have in mind. It's not that
hard to change, so this patch does so, allowing an arbitrary number of
labels on any given node or property. As usual a testcase is added
too.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
The only purpose of the dtc_references_dts0 testcase was to check
handling of references in the old dts v0 syntax. Since we no longer
support the old syntax, and the references_dts0.dts has been converted
to the new format, it's entirely redundant. This patch removes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, nothing will stop you from re-using the same label string
multiple times in a dts, e.g.:
/ {
samelabel: prop1 = "foo";
samelabel: prop2 = "bar";
};
or
/ {
samelabel: prop1 = "foo";
samelabel: subnode {
};
};
When using node references by label, this could lead to confusing
results (with no warning), and in -Oasm mode will result in output
which the assembler will complain about (since it too will have
duplicate labels).
This patch, therefore, adds code to checks.c to give errors if you
attempt to re-use the same label. It treats all labels (node,
property, and value) as residing in the same namespace, since the
assembler will treat them so for -Oasm mode.
Testcases for the new code are also added.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, when in -Idts -Odtb or -Ifs -Odtb modes, dtc always
defaults to using 0 as the value for the boot_cpuid_phys header field.
That's correct quite often, but there are some systems where there is
no CPU with hardware ID of 0, or where we don't want to use the CPU
with hardware ID 0 at all (e.g. for AMP-style partitioning). The only
way to override this default currently, is with the -b command line
option.
This patch improves dtc to instead base the default boot_cpuid_phys
value on the reg property of the first listed subnode of /cpus. This
means that dtc will get boot_cpuid_phys correct by default in a
greater proportion of cases (since the boot cpu is usually listed
first, and this way at least the boot_cpuid_phys default will match
some existing cpu node). If the node doesn't exist or has an invalid
'reg' property (missing or not 4 bytes in length), then
boot_cpuid_phys is set to 0.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This mod allows successful build of dtc using both bison/flex and yacc/lex.
Signed-off-by: Lukasz Wojcik <zbr@semihalf.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This patch makes some small cleanups to the declaration of YYLTYPE,
YYLLOC_DEFAULT and related things.
- We used to use undocumented magic #defines for bison,
YYLTYPE_IS_DECLARED and YYLTYPE_IS_TRIVIAL. This may not be
portable across bison versions. Instead define YYLTYPE as a
macro in terms of struct srcpos, as the info pages suggest.
- Our kernel-derived coding style discourages typedefed
structures. So use 'struct srcpos' instead of 'srcpos'
throughout'.
- Indent the YYLLOC_DEFAULT macro according to our coding
style (it was in GNU indent style, since it was taken from
the example in the bison info).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
There are several small problems with the current srcpos_string().
- The code unnecessarily uses a temp buffer and two rounds of
*printf(); a single asprintf() will suffice.
- With previous changes, pos->file->name can never be NULL,
and the name field for a srcfile bound to stdin is already
set to something sensible.
- On allocation failure in asprintf() it returns a bogus
result, instead of causing a fatal error like every other
failed allocation.
- The format for representing file/line/column is gratuitously
different from the file/line format we used to use, and the
format used by gcc and bison.
This patch addresses all of these. There remains the problem that
asprintf() is not portable, but that can wait until another patch.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Our YYLTYPE current carries around first and last line and first and
last column information. However, of these, on the first line
information is actually filled in properly.
Furthermore, filling in the line number information from yylineno is
kind of clunky: we have to copy its value to the srcfile stack and
back to handle include file positioning correctly.
This patch cleans this up. We turn off flex's yylineno option and
instead track the line and column number ourselves from
YY_USER_ACTION. The line and column number are stored directly inside
the srcfile_state structure, so it's automatically a per-file
quantity. We now also fill in all the yylloc from YY_USER_ACTION.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch cleans up our handling of input files, particularly dts
source files, but also (to an extent) other input files such as those
used by /incbin/ and those used in -I dtb and -I fs modes.
We eliminate the current clunky mechanism which combines search paths
(which we don't actually use at present) with the open relative to
current source file behaviour, which we do.
Instead there's a single srcfile_relative_open() entry point for
callers which opens a new input file relative to the current source
file (which the srcpos code tracks internally). It doesn't currently
do search paths, but we can add that later without messing with the
callers, by drawing the search path from a global (which makes sense
anyway, rather than shuffling it around the rest of the processing
code).
That suffices for non-dts input files. For the actual dts files,
srcfile_push() and srcfile_pop() wrappers open the file while also
keeping track of it as the current source file for future opens.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently, the Linux kernel, libfdt and dtc, when using flattened
device trees encode a node's phandle into a property named
"linux,phandle". The ePAPR specification, however - aiming as it is
to not be a Linux specific spec - requires that phandles be encoded in
a property named simply "phandle".
This patch adds support for this newer approach to dtc and libfdt.
Specifically:
- fdt_get_phandle() will now return the correct phandle if it
is supplied in either of these properties
- fdt_node_offset_by_phandle() will correctly find a node with
the given phandle encoded in either property.
- By default, when auto-generating phandles, dtc will encode
it into both properties for maximum compatibility. A new -H
option allows either only old-style or only new-style
properties to be generated.
- If phandle properties are explicitly supplied in the dts
file, dtc will not auto-generate ones in the alternate format.
- If both properties are supplied, dtc will check that they
have the same value.
- Some existing testcases are updated to use a mix of old and
new-style phandles, partially testing the changes.
- A new phandle_format test further tests the libfdt support,
and the -H option.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This patch makes a number of minor changes to the ftdump debugging
tool.
* There was an endian bug in one place, which this fixes.
* We now use const qualifiers in a number of places where we can
* ftdump can now be instructed to read from stdin by giving "-" as
the filename.
* The buffer into which the blob is read is increased from 16k to
64k, and is now dynamically allocated.
* ftdump now emits source in dts-v1 format
Since ftdump is little used these days, these fixes are arguably of
little use. On the other hand, I already did the work of making the
changes some time back, so I guess we might as well fold these small
fixes and improvements in.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
I've just tested building dtc as an x86_64 binary on a 32-bit i386
host by using:
make CC="gcc -m64"
This patch fixes a handful of minor bugs thus discovered:
* There is a printf() type mismatch on 64-bit in value-labels.c
* For the tests which use libdl, we were using the GNU make feature
where it will find libdl.so given a dependency in the form '-ldl'.
But this built-in make logic doesn't know we're compiling 64-bit so
finds the 32-bit version of the library. We avoid using this and
instead explicitly pass -ldl to CC, which being the 64-bit version
does know where to look.
* To process dtc's asm output into .so files, run_tests.sh was
directly invoking the (default instance of) the assembler and linker.
Instead invoke these via the CC driver, and allow that to be overriden
from the make environment.
* The x86_64 assembler doesn't 0 fill with the .balign directive
(presumably it is NOP filling). That doesn't produce strictly
incorrect trees, but it is confusing and confounds are testcases which
do byte-by-byte comparison of the trees produced by asm output with
direct dtb output (which does 0 pad where necessary, of course). This
patch uses the optional second argument to .balign to force gas to
zero-fill instead.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
In one section, the run_tests script attempts to use the -e (interpret
escapes) option to echo. This option is not portable - for example
the echo built into dash, now the default /bin/sh on several
distributions does not support it and will just echo "-e" literally.
Since we don't actually use any of the escapes that -e enables, this
patch simply removes it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
yylloc is the correct way to get token positioning information.
yyloc is a bison internal variable that only works by accident.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
When in -Odts mode, dtc will not produce correct output for
string-like properties which have more than one \0 character at the
end of the property's bytestring. In fact, it generates output which
is not syntactically correct. This patch fixes the bug, and adds a
testcase for future regressions here.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
use dylib shared lib extention
allow to specifiy os specific shared lib link option
Mac OS use -dynamiclib instead of -shared, -install_name instead of -soname
and does not support --version-script
add HOSTOS macro to detect the current os you are
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Allow the inclusion of libfdt.h in C++ source.
Signed-off-by: Laurent Gregoire <laurent.gregoire@tomtom.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
.../dtc/libfdt/fdt_sw.c: In function 'fdt_end_node':
.../dtc/libfdt/fdt_sw.c:81: error: assuming signed overflow does not occur when assuming that (X + c) < X is always false
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Currently, callers of fdt_next_tag() must usually follow the call with
some sort of call to fdt_offset_ptr() to verify that the blob isn't
truncated in the middle of the tag data they're going to process.
This is a bit silly, since fdt_next_tag() generally has to call
fdt_offset_ptr() on at least some of the data following the tag for
its own operation.
This patch alters fdt_next_tag() to always use fdt_offset_ptr() to
verify the data between its starting offset and the offset it returns
in nextoffset. This simplifies fdt_get_property() which no longer has
to verify itself that the property data is all present.
At the same time, I neaten and clarify the error handling for
fdt_next_tag(). Previously, fdt_next_tag() could return -1 instead of
a tag value in some circumstances - which almost none of the callers
checked for. Also, fdt_next_tag() could return FDT_END either because
it encountered an FDT_END tag, or because it reached the end of the
structure block - no way was provided to tell between these cases.
With this patch, fdt_next_tag() always returns FDT_END with a negative
value in nextoffset for an error. This means the several places which
loop looking for FDT_END will still work correctly - they only need to
check for errors at the end. The errors which fdt_next_tag() can
report are:
- -FDT_ERR_TRUNCATED if it reached the end of the structure
block instead of finding a tag.
- -FDT_BADSTRUCTURE if a bad tag was encountered, or if the
tag data couldn't be verified with fdt_offset_ptr().
This patch also updates the callers of fdt_next_tag(), where
appropriate, to make use of the new error reporting.
Finally, the prototype for the long gone _fdt_next_tag() is removed
from libfdt_internal.h.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Currently fdt_next_node() will find the next node in the blob
regardless of whether it is above, below or at the same level in the
tree as the starting node - the depth parameter is updated to indicate
which is the case. When a depth parameter is supplied, this patch
makes it instead terminate immediately when it finds the END_NODE tag
for a node at depth 0. In this case it returns the offset immediately
past the END_NODE tag.
This has a couple of advantages. First, this slightly simplifies
fdt_subnode_offset(), which no longer needs to explicitly check that
fdt_next_node()'s iteration hasn't left the starting node. Second,
this allows fdt_next_node() to be used to implement
_fdt_node_end_offset() considerably simplifying the latter function.
The other users of fdt_next_node() either don't need to iterate out of
the starting node, or don't pass a depth parameter at all. Any
callers that really need to iterate out of the starting node, but keep
tracking depth can do so by biasing the initial depth value.
This is a semantic change, but I think it's very unlikely to break any
existing library users.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Anton Staaf