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Many of the libfdt entry points call some sort of sanity check function
before doing anything else. These need to do slightly different things for
the various classes of functions.
The read-only version is shared with the exported fdt_check_header(), which
limits us a bit in how we can improve it. For that reason split the two
functions apart (though the exported one just calls the ro one for now).
We also rename the functions for more consistency - they're all named
fdt_XX_probe_() where the XX indicates which class of functions they're
for. "probe" is a better "term" than the previous check, since they really
only do minimal validation.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
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In a lot of places libfdt uses a leading _ character to mark an identifier
as "internal" (not part of the published libfdt API). This is a bad idea,
because identifiers with a leading _ are generally reserved by the C
library or system. It's particularly dangerous for libfdt, because it's
designed to be able to be integrated into lots of different environments.
In some cases the leading _ has no purpose, so we simply drop it. In most
cases we move it to the end, as our new convention for marking internal
identifiers.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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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>
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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>
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The standard way of setting an empty property using libfdt is:
fdt_setprop(fdt, nodeoffset, propname, NULL, 0);
However, the implementation of this includes an unconditional:
memcpy(prop->data, NULL, 0);
Which although it will be a no-op (which is what we want) on many platforms
is technically undefined behaviour. Correct this, so that when passing
a 0 length, passing a NULL pointer as the value to fdt_setprop() is
definitely safe. This should quiet static checkers which complain about
this.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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The variable "err" is unneeded.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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This patch catches the conditions where:
- 'splicepoint' is set to a point outside of [ fdt, fdt_totalsize(fdt) )
- 'newlen' is negative, or 'splicepoint' plus 'newlen' results in overflow
Either of these cases can be caused by math which overflows in calling
functions, or by sizes specified through dynamic means.
Signed-off-by: Courtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
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Import from:
git://git.kernel.org/pub/scm/utils/dtc/dtc.git
Commit:
604e61e081e3c6c8fa1a8189c71cb3908a5bbc1e
Date:
2015-09-29T09:09:08Z
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