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https://github.com/xen-project/xen.git
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Julien Grall
4b7fbef6fb
The functions fdt_{first,next}_subnode may not be available because:
* It has been introduced in 2013 => Doesn't work on Wheezy
* The prototype exists but the functions are not exposed. Don't ask
why...
The later has been fixed recently in the dtc repo [1]
When the functions are not available, implement our own in order to use
them in a following patch.
Note that the _hidden attribute is placed in both the prototype and the
declaration because some version of libfdt expose the prototype but not
the declaration.
[1] git://git.kernel.org/pub/scm/utils/dtc/dtc.git
commit a4b093f7366fdb429ca1781144d3985fa50d0fbb
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[ ijc -- ran autogen.sh ]
95 lines
3.5 KiB
C
95 lines
3.5 KiB
C
/*
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* Copyright (C) 2006 David Gibson, IBM Corporation.
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*
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* This file is part of libxl, and was originally taken from libfdt.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; version 2.1 only. with the special
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* exception on linking described in file LICENSE.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* Additionally, this particular file is dual licensed. That is,
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* alternatively, at your option:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Note that this applies only to this file, and other files with a
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* similar notice. Also, note that when the same code is distributed
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* along with the rest of libxl, you must comply with the terms of the
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* LGPLv2.1 for the whole of libxl including this file.
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*
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* The intent is to permit, in particular, upstream libfdt to
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* incorporate improvements to this file within upstream libfdt. At
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* the time of writing, upstream libfdt is dual licensed: 2-clause BSD
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* (as above) and GPLv2-or-later. The 2-clause BSD licence is
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* compatible with both GPLv2-or-later and LGPLv2.1-only; this permits
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* copying in both directions, and the optional licence upgrade to a
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* copyleft licence by libdft upstream or the Xen Project,
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* respectively.
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*/
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#include <libfdt.h>
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#include "libxl_libfdt_compat.h"
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#ifndef HAVE_FDT_FIRST_SUBNODE
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_hidden int fdt_first_subnode(const void *fdt, int offset)
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{
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int depth = 0;
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offset = fdt_next_node(fdt, offset, &depth);
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if (offset < 0 || depth != 1)
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return -FDT_ERR_NOTFOUND;
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return offset;
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}
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#endif
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#ifndef HAVE_FDT_NEXT_SUBNODE
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_hidden int fdt_next_subnode(const void *fdt, int offset)
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{
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int depth = 1;
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/*
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* With respect to the parent, the depth of the next subnode will be
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* the same as the last.
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*/
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do {
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offset = fdt_next_node(fdt, offset, &depth);
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if (offset < 0 || depth < 1)
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return -FDT_ERR_NOTFOUND;
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} while (depth > 1);
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return offset;
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}
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#endif
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